git.maemo.org Git - monky/blob - src/linux.c

   1 /* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
   2  * vim: ts=4 sw=4 noet ai cindent syntax=c
   3  *
   4  * Conky, a system monitor, based on torsmo
   5  *
   6  * Any original torsmo code is licensed under the BSD license
   7  *
   8  * All code written since the fork of torsmo is licensed under the GPL
   9  *
  10  * Please see COPYING for details
  11  *
  12  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
  13  * Copyright (c) 2007 Toni Spets
  14  * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
  15  *      (see AUTHORS)
  16  * All rights reserved.
  17  *
  18  * This program is free software: you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation, either version 3 of the License, or
  21  * (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  29  *
  30  */
  31
  32 #include "conky.h"
  33 #include "logging.h"
  34 #include "common.h"
  35 #include "linux.h"
  36 #include "net_stat.h"
  37 #include "diskio.h"
  38 #include "temphelper.h"
  39 #include <dirent.h>
  40 #include <ctype.h>
  41 #include <errno.h>
  42 #include <limits.h>
  43 #include <sys/types.h>
  44 #include <sys/sysinfo.h>
  45 #include <sys/stat.h>
  46 #ifndef HAVE_CLOCK_GETTIME
  47 #include <sys/time.h>
  48 #endif
  49 #include <fcntl.h>
  50 #include <unistd.h>
  51 // #include <assert.h>
  52 #include <time.h>
  53 #include "top.h"
  54
  55 #include <sys/ioctl.h>
  56 #include <sys/socket.h>
  57 #include <netinet/in.h>
  58 #include <linux/sockios.h>
  59 #include <net/if.h>
  60 #include <arpa/inet.h>
  61 #ifdef _NET_IF_H
  62 #define _LINUX_IF_H
  63 #endif
  64 #include <linux/route.h>
  65 #include <math.h>
  66
  67 /* The following ifdefs were adapted from gkrellm */
  68 #include <linux/major.h>
  69
  70 #if !defined(MD_MAJOR)
  71 #define MD_MAJOR 9
  72 #endif
  73
  74 #if !defined(LVM_BLK_MAJOR)
  75 #define LVM_BLK_MAJOR 58
  76 #endif
  77
  78 #if !defined(NBD_MAJOR)
  79 #define NBD_MAJOR 43
  80 #endif
  81
  82 #ifdef HAVE_IWLIB
  83 #include <iwlib.h>
  84 #endif
  85
  86 struct sysfs {
  87         int fd;
  88         int arg;
  89         char devtype[256];
  90         char type[64];
  91         float factor, offset;
  92 };
  93
  94 #define SHORTSTAT_TEMPL "%*s %llu %llu %llu"
  95 #define LONGSTAT_TEMPL "%*s %llu %llu %llu "
  96
  97 /* This flag tells the linux routines to use the /proc system where possible,
  98  * even if other api's are available, e.g. sysinfo() or getloadavg().
  99  * the reason for this is to allow for /proc-based distributed monitoring.
 100  * using a flag in this manner creates less confusing code. */
 101 static int prefer_proc = 0;
 102
 103 void prepare_update(void)
 104 {
 105 }
 106
 107 void update_uptime(void)
 108 {
 109 #ifdef HAVE_SYSINFO
 110         if (!prefer_proc) {
 111                 struct sysinfo s_info;
 112
 113                 sysinfo(&s_info);
 114                 info.uptime = (double) s_info.uptime;
 115         } else
 116 #endif
 117         {
 118                 static int rep = 0;
 119                 FILE *fp;
 120
 121                 if (!(fp = open_file("/proc/uptime", &rep))) {
 122                         info.uptime = 0.0;
 123                         return;
 124                 }
 125                 fscanf(fp, "%lf", &info.uptime);
 126                 fclose(fp);
 127         }
 128 }
 129
 130 int check_mount(char *s)
 131 {
 132         int ret = 0;
 133         FILE *mtab = fopen("/etc/mtab", "r");
 134
 135         if (mtab) {
 136                 char buf1[256], buf2[128];
 137
 138                 while (fgets(buf1, 256, mtab)) {
 139                         sscanf(buf1, "%*s %128s", buf2);
 140                         if (!strcmp(s, buf2)) {
 141                                 ret = 1;
 142                                 break;
 143                         }
 144                 }
 145                 fclose(mtab);
 146         } else {
 147                 NORM_ERR("Could not open mtab");
 148         }
 149         return ret;
 150 }
 151
 152 /* these things are also in sysinfo except Buffers:
 153  * (that's why I'm reading them from proc) */
 154
 155 void update_meminfo(void)
 156 {
 157         FILE *meminfo_fp;
 158         static int rep = 0;
 159
 160         /* unsigned int a; */
 161         char buf[256];
 162
 163         info.mem = info.memmax = info.swap = info.swapfree = info.swapmax = info.bufmem =
 164                 info.buffers = info.cached = info.memfree = info.memeasyfree = 0;
 165
 166         if (!(meminfo_fp = open_file("/proc/meminfo", &rep))) {
 167                 return;
 168         }
 169
 170         while (!feof(meminfo_fp)) {
 171                 if (fgets(buf, 255, meminfo_fp) == NULL) {
 172                         break;
 173                 }
 174
 175                 if (strncmp(buf, "MemTotal:", 9) == 0) {
 176                         sscanf(buf, "%*s %llu", &info.memmax);
 177                 } else if (strncmp(buf, "MemFree:", 8) == 0) {
 178                         sscanf(buf, "%*s %llu", &info.memfree);
 179                 } else if (strncmp(buf, "SwapTotal:", 10) == 0) {
 180                         sscanf(buf, "%*s %llu", &info.swapmax);
 181                 } else if (strncmp(buf, "SwapFree:", 9) == 0) {
 182                         sscanf(buf, "%*s %llu", &info.swapfree);
 183                 } else if (strncmp(buf, "Buffers:", 8) == 0) {
 184                         sscanf(buf, "%*s %llu", &info.buffers);
 185                 } else if (strncmp(buf, "Cached:", 7) == 0) {
 186                         sscanf(buf, "%*s %llu", &info.cached);
 187                 }
 188         }
 189
 190         info.mem = info.memmax - info.memfree;
 191         info.memeasyfree = info.memfree;
 192         info.swap = info.swapmax - info.swapfree;
 193
 194         info.bufmem = info.cached + info.buffers;
 195
 196         fclose(meminfo_fp);
 197 }
 198
 199 int get_laptop_mode(void)
 200 {
 201         FILE *fp;
 202         int val = -1;
 203
 204         if ((fp = fopen("/proc/sys/vm/laptop_mode", "r")) != NULL)
 205                 fscanf(fp, "%d\n", &val);
 206         fclose(fp);
 207         return val;
 208 }
 209
 210 /* my system says:
 211  * # cat /sys/block/sda/queue/scheduler
 212  * noop [anticipatory] cfq
 213  */
 214 char *get_ioscheduler(char *disk)
 215 {
 216         FILE *fp;
 217         char buf[128];
 218
 219         if (!disk)
 220                 return strndup("n/a", text_buffer_size);
 221
 222         snprintf(buf, 127, "/sys/block/%s/queue/scheduler", disk);
 223         if ((fp = fopen(buf, "r")) == NULL) {
 224                 return strndup("n/a", text_buffer_size);
 225         }
 226         while (!feof(fp)) {
 227                 fscanf(fp, "%127s", buf);
 228                 if (buf[0] == '[') {
 229                         buf[strlen(buf) - 1] = '\0';
 230                         fclose(fp);
 231                         return strndup(buf + 1, text_buffer_size);
 232                 }
 233         }
 234         fclose(fp);
 235         return strndup("n/a", text_buffer_size);
 236 }
 237
 238 static struct {
 239         char *iface;
 240         char *ip;
 241         int count;
 242 } gw_info;
 243
 244 #define COND_FREE(x) if(x) free(x); x = 0
 245 #define SAVE_SET_STRING(x, y) \
 246         if (x && strcmp((char *)x, (char *)y)) { \
 247                 free(x); \
 248                 x = strndup("multiple", text_buffer_size); \
 249         } else if (!x) { \
 250                 x = strndup(y, text_buffer_size); \
 251         }
 252
 253 void update_gateway_info_failure(const char *reason)
 254 {
 255         if(reason != NULL) {
 256                 perror(reason);
 257         }
 258         //2 pointers to 1 location causes a crash when we try to free them both
 259         gw_info.iface = strndup("failed", text_buffer_size);
 260         gw_info.ip = strndup("failed", text_buffer_size);
 261 }
 262
 263
 264 /* Iface Destination Gateway Flags RefCnt Use Metric Mask MTU Window IRTT */
 265 #define RT_ENTRY_FORMAT "%63s %lx %lx %x %*d %*d %*d %lx %*d %*d %*d\n"
 266
 267 void update_gateway_info(void)
 268 {
 269         FILE *fp;
 270         struct in_addr ina;
 271         char iface[64];
 272         unsigned long dest, gate, mask;
 273         unsigned int flags;
 274
 275         COND_FREE(gw_info.iface);
 276         COND_FREE(gw_info.ip);
 277         gw_info.count = 0;
 278
 279         if ((fp = fopen("/proc/net/route", "r")) == NULL) {
 280                 update_gateway_info_failure("fopen()");
 281                 return;
 282         }
 283
 284         /* skip over the table header line, which is always present */
 285         fscanf(fp, "%*[^\n]\n");
 286
 287         while (!feof(fp)) {
 288                 if(fscanf(fp, RT_ENTRY_FORMAT,
 289                           iface, &dest, &gate, &flags, &mask) != 5) {
 290                         update_gateway_info_failure("fscanf()");
 291                         break;
 292                 }
 293                 if (!(dest || mask) && ((flags & RTF_GATEWAY) || !gate) ) {
 294                         gw_info.count++;
 295                         SAVE_SET_STRING(gw_info.iface, iface)
 296                         ina.s_addr = gate;
 297                         SAVE_SET_STRING(gw_info.ip, inet_ntoa(ina))
 298                 }
 299         }
 300         fclose(fp);
 301         return;
 302 }
 303
 304 void free_gateway_info(void)
 305 {
 306         if (gw_info.iface)
 307                 free(gw_info.iface);
 308         if (gw_info.ip)
 309                 free(gw_info.ip);
 310         memset(&gw_info, 0, sizeof(gw_info));
 311 }
 312
 313 int gateway_exists(void)
 314 {
 315         return !!gw_info.count;
 316 }
 317
 318 void print_gateway_iface(char *p, int p_max_size)
 319 {
 320         snprintf(p, p_max_size, "%s", gw_info.iface);
 321 }
 322
 323 void print_gateway_ip(char *p, int p_max_size)
 324 {
 325         snprintf(p, p_max_size, "%s", gw_info.ip);
 326 }
 327
 328 void update_net_stats(void)
 329 {
 330         FILE *net_dev_fp;
 331         static int rep = 0;
 332         static char first = 1;
 333
 334         // FIXME: arbitrary size chosen to keep code simple.
 335         int i, i2;
 336         unsigned int curtmp1, curtmp2;
 337         unsigned int k;
 338         struct ifconf conf;
 339         char buf[256];
 340         double delta;
 341
 342 #ifdef HAVE_IWLIB
 343         // wireless info variables
 344         int skfd, has_bitrate = 0;
 345         struct wireless_info *winfo;
 346         struct iwreq wrq;
 347 #endif
 348
 349         /* get delta */
 350         delta = current_update_time - last_update_time;
 351         if (delta <= 0.0001) {
 352                 return;
 353         }
 354
 355         /* open file and ignore first two lines */
 356         if (!(net_dev_fp = open_file("/proc/net/dev", &rep))) {
 357                 clear_net_stats();
 358                 return;
 359         }
 360
 361         fgets(buf, 255, net_dev_fp);    /* garbage */
 362         fgets(buf, 255, net_dev_fp);    /* garbage (field names) */
 363
 364         /* read each interface */
 365         for (i2 = 0; i2 < 16; i2++) {
 366                 struct net_stat *ns;
 367                 char *s, *p;
 368                 char temp_addr[18];
 369                 long long r, t, last_recv, last_trans;
 370
 371                 if (fgets(buf, 255, net_dev_fp) == NULL) {
 372                         break;
 373                 }
 374                 p = buf;
 375                 while (isspace((int) *p)) {
 376                         p++;
 377                 }
 378
 379                 s = p;
 380
 381                 while (*p && *p != ':') {
 382                         p++;
 383                 }
 384                 if (*p == '\0') {
 385                         continue;
 386                 }
 387                 *p = '\0';
 388                 p++;
 389
 390                 ns = get_net_stat(s, NULL, NULL);
 391                 ns->up = 1;
 392                 memset(&(ns->addr.sa_data), 0, 14);
 393
 394                 memset(ns->addrs, 0, 17 * 16 + 1); /* Up to 17 chars per ip, max 16 interfaces. Nasty memory usage... */
 395
 396                 last_recv = ns->recv;
 397                 last_trans = ns->trans;
 398
 399                 /* bytes packets errs drop fifo frame compressed multicast|bytes ... */
 400                 sscanf(p, "%lld  %*d     %*d  %*d  %*d  %*d   %*d        %*d       %lld",
 401                         &r, &t);
 402
 403                 /* if recv or trans is less than last time, an overflow happened */
 404                 if (r < ns->last_read_recv) {
 405                         last_recv = 0;
 406                 } else {
 407                         ns->recv += (r - ns->last_read_recv);
 408                 }
 409                 ns->last_read_recv = r;
 410
 411                 if (t < ns->last_read_trans) {
 412                         last_trans = 0;
 413                 } else {
 414                         ns->trans += (t - ns->last_read_trans);
 415                 }
 416                 ns->last_read_trans = t;
 417
 418                 /*** ip addr patch ***/
 419                 i = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
 420
 421                 conf.ifc_buf = malloc(sizeof(struct ifreq) * 16);
 422                 conf.ifc_len = sizeof(struct ifreq) * 16;
 423                 memset(conf.ifc_buf, 0, conf.ifc_len);
 424
 425                 ioctl((long) i, SIOCGIFCONF, &conf);
 426
 427                 for (k = 0; k < conf.ifc_len / sizeof(struct ifreq); k++) {
 428                         struct net_stat *ns2;
 429
 430                         if (!(((struct ifreq *) conf.ifc_buf) + k))
 431                                 break;
 432
 433                         ns2 = get_net_stat(
 434                                         ((struct ifreq *) conf.ifc_buf)[k].ifr_ifrn.ifrn_name, NULL, NULL);
 435                         ns2->addr = ((struct ifreq *) conf.ifc_buf)[k].ifr_ifru.ifru_addr;
 436                         sprintf(temp_addr, "%u.%u.%u.%u, ",
 437                                         ns2->addr.sa_data[2] & 255,
 438                                         ns2->addr.sa_data[3] & 255,
 439                                         ns2->addr.sa_data[4] & 255,
 440                                         ns2->addr.sa_data[5] & 255);
 441                         if(NULL == strstr(ns2->addrs, temp_addr))
 442                                 strncpy(ns2->addrs + strlen(ns2->addrs), temp_addr, 17);
 443                 }
 444
 445                 close((long) i);
 446
 447                 free(conf.ifc_buf);
 448
 449                 /*** end ip addr patch ***/
 450
 451                 if (!first) {
 452                         /* calculate speeds */
 453                         ns->net_rec[0] = (ns->recv - last_recv) / delta;
 454                         ns->net_trans[0] = (ns->trans - last_trans) / delta;
 455                 }
 456
 457                 curtmp1 = 0;
 458                 curtmp2 = 0;
 459                 // get an average
 460 #ifdef HAVE_OPENMP
 461 #pragma omp parallel for reduction(+:curtmp1, curtmp2) schedule(dynamic,10)
 462 #endif /* HAVE_OPENMP */
 463                 for (i = 0; i < info.net_avg_samples; i++) {
 464                         curtmp1 = curtmp1 + ns->net_rec[i];
 465                         curtmp2 = curtmp2 + ns->net_trans[i];
 466                 }
 467                 if (curtmp1 == 0) {
 468                         curtmp1 = 1;
 469                 }
 470                 if (curtmp2 == 0) {
 471                         curtmp2 = 1;
 472                 }
 473                 ns->recv_speed = curtmp1 / (double) info.net_avg_samples;
 474                 ns->trans_speed = curtmp2 / (double) info.net_avg_samples;
 475                 if (info.net_avg_samples > 1) {
 476 #ifdef HAVE_OPENMP
 477 #pragma omp parallel for schedule(dynamic,10)
 478 #endif /* HAVE_OPENMP */
 479                         for (i = info.net_avg_samples; i > 1; i--) {
 480                                 ns->net_rec[i - 1] = ns->net_rec[i - 2];
 481                                 ns->net_trans[i - 1] = ns->net_trans[i - 2];
 482                         }
 483                 }
 484
 485 #ifdef HAVE_IWLIB
 486                 /* update wireless info */
 487                 winfo = malloc(sizeof(struct wireless_info));
 488                 memset(winfo, 0, sizeof(struct wireless_info));
 489
 490                 skfd = iw_sockets_open();
 491                 if (iw_get_basic_config(skfd, s, &(winfo->b)) > -1) {
 492
 493                         // set present winfo variables
 494                         if (iw_get_stats(skfd, s, &(winfo->stats),
 495                                         &winfo->range, winfo->has_range) >= 0) {
 496                                 winfo->has_stats = 1;
 497                         }
 498                         if (iw_get_range_info(skfd, s, &(winfo->range)) >= 0) {
 499                                 winfo->has_range = 1;
 500                         }
 501                         if (iw_get_ext(skfd, s, SIOCGIWAP, &wrq) >= 0) {
 502                                 winfo->has_ap_addr = 1;
 503                                 memcpy(&(winfo->ap_addr), &(wrq.u.ap_addr), sizeof(sockaddr));
 504                         }
 505
 506                         // get bitrate
 507                         if (iw_get_ext(skfd, s, SIOCGIWRATE, &wrq) >= 0) {
 508                                 memcpy(&(winfo->bitrate), &(wrq.u.bitrate), sizeof(iwparam));
 509                                 iw_print_bitrate(ns->bitrate, 16, winfo->bitrate.value);
 510                                 has_bitrate = 1;
 511                         }
 512
 513                         // get link quality
 514                         if (winfo->has_range && winfo->has_stats
 515                                         && ((winfo->stats.qual.level != 0)
 516                                         || (winfo->stats.qual.updated & IW_QUAL_DBM))) {
 517                                 if (!(winfo->stats.qual.updated & IW_QUAL_QUAL_INVALID)) {
 518                                         ns->link_qual = winfo->stats.qual.qual;
 519                                         ns->link_qual_max = winfo->range.max_qual.qual;
 520                                 }
 521                         }
 522
 523                         // get ap mac
 524                         if (winfo->has_ap_addr) {
 525                                 iw_sawap_ntop(&winfo->ap_addr, ns->ap);
 526                         }
 527
 528                         // get essid
 529                         if (winfo->b.has_essid) {
 530                                 if (winfo->b.essid_on) {
 531                                         snprintf(ns->essid, 32, "%s", winfo->b.essid);
 532                                 } else {
 533                                         snprintf(ns->essid, 32, "off/any");
 534                                 }
 535                         }
 536
 537                         snprintf(ns->mode, 16, "%s", iw_operation_mode[winfo->b.mode]);
 538                 }
 539                 iw_sockets_close(skfd);
 540                 free(winfo);
 541 #endif
 542         }
 543         first = 0;
 544
 545         fclose(net_dev_fp);
 546 }
 547
 548 int result;
 549
 550 void update_total_processes(void)
 551 {
 552 #ifdef HAVE_SYSINFO
 553         if (!prefer_proc) {
 554                 struct sysinfo s_info;
 555
 556                 sysinfo(&s_info);
 557                 info.procs = s_info.procs;
 558         } else
 559 #endif
 560         {
 561                 static int rep = 0;
 562                 FILE *fp;
 563
 564                 if (!(fp = open_file("/proc/loadavg", &rep))) {
 565                         info.procs = 0;
 566                         return;
 567                 }
 568                 fscanf(fp, "%*f %*f %*f %*d/%hu", &info.procs);
 569                 fclose(fp);
 570         }
 571 }
 572
 573 #define CPU_SAMPLE_COUNT 15
 574 struct cpu_info {
 575         unsigned long long cpu_user;
 576         unsigned long long cpu_system;
 577         unsigned long long cpu_nice;
 578         unsigned long long cpu_idle;
 579         unsigned long long cpu_iowait;
 580         unsigned long long cpu_irq;
 581         unsigned long long cpu_softirq;
 582         unsigned long long cpu_steal;
 583         unsigned long long cpu_total;
 584         unsigned long long cpu_active_total;
 585         unsigned long long cpu_last_total;
 586         unsigned long long cpu_last_active_total;
 587         double cpu_val[CPU_SAMPLE_COUNT];
 588 };
 589 static short cpu_setup = 0;
 590
 591 /* Determine if this kernel gives us "extended" statistics information in
 592  * /proc/stat.
 593  * Kernels around 2.5 and earlier only reported user, system, nice, and
 594  * idle values in proc stat.
 595  * Kernels around 2.6 and greater report these PLUS iowait, irq, softirq,
 596  * and steal */
 597 void determine_longstat(char *buf)
 598 {
 599         unsigned long long iowait = 0;
 600
 601         KFLAG_SETOFF(KFLAG_IS_LONGSTAT);
 602         /* scanf will either return -1 or 1 because there is only 1 assignment */
 603         if (sscanf(buf, "%*s %*d %*d %*d %*d %llu", &iowait) > 0) {
 604                 KFLAG_SETON(KFLAG_IS_LONGSTAT);
 605         }
 606 }
 607
 608 void get_cpu_count(void)
 609 {
 610         FILE *stat_fp;
 611         static int rep = 0;
 612         char buf[256];
 613
 614         if (info.cpu_usage) {
 615                 return;
 616         }
 617
 618         if (!(stat_fp = open_file("/proc/stat", &rep))) {
 619                 return;
 620         }
 621
 622         info.cpu_count = 0;
 623
 624         while (!feof(stat_fp)) {
 625                 if (fgets(buf, 255, stat_fp) == NULL) {
 626                         break;
 627                 }
 628
 629                 if (strncmp(buf, "cpu", 3) == 0 && isdigit(buf[3])) {
 630                         if (info.cpu_count == 0) {
 631                                 determine_longstat(buf);
 632                         }
 633                         info.cpu_count++;
 634                 }
 635         }
 636         info.cpu_usage = malloc((info.cpu_count + 1) * sizeof(float));
 637
 638         fclose(stat_fp);
 639 }
 640
 641 #define TMPL_LONGSTAT "%*s %llu %llu %llu %llu %llu %llu %llu %llu"
 642 #define TMPL_SHORTSTAT "%*s %llu %llu %llu %llu"
 643
 644 inline static void update_stat(void)
 645 {
 646         FILE *stat_fp;
 647         static int rep = 0;
 648         static struct cpu_info *cpu = NULL;
 649         char buf[256];
 650         int i;
 651         unsigned int idx;
 652         double curtmp;
 653         const char *stat_template = NULL;
 654         unsigned int malloc_cpu_size = 0;
 655         extern void* global_cpu;
 656         static double last_stat_update = 0.0;
 657
 658         /* since we use wrappers for this function, the update machinery
 659          * can't eliminate double invocations of this function. Check for
 660          * them here, otherwise cpu_usage counters are freaking out. */
 661         if (last_stat_update == current_update_time)
 662                 return;
 663         last_stat_update = current_update_time;
 664
 665         /* add check for !info.cpu_usage since that mem is freed on a SIGUSR1 */
 666         if (!cpu_setup || !info.cpu_usage) {
 667                 get_cpu_count();
 668                 cpu_setup = 1;
 669         }
 670
 671         if (!stat_template) {
 672                 stat_template =
 673                         KFLAG_ISSET(KFLAG_IS_LONGSTAT) ? TMPL_LONGSTAT : TMPL_SHORTSTAT;
 674         }
 675
 676         if (!global_cpu) {
 677                 malloc_cpu_size = (info.cpu_count + 1) * sizeof(struct cpu_info);
 678                 cpu = malloc(malloc_cpu_size);
 679                 memset(cpu, 0, malloc_cpu_size);
 680                 global_cpu = cpu;
 681         }
 682
 683         if (!(stat_fp = open_file("/proc/stat", &rep))) {
 684                 info.run_procs = 0;
 685                 if (info.cpu_usage) {
 686                         memset(info.cpu_usage, 0, info.cpu_count * sizeof(float));
 687                 }
 688                 return;
 689         }
 690
 691         idx = 0;
 692         while (!feof(stat_fp)) {
 693                 if (fgets(buf, 255, stat_fp) == NULL) {
 694                         break;
 695                 }
 696
 697                 if (strncmp(buf, "procs_running ", 14) == 0) {
 698                         sscanf(buf, "%*s %hu", &info.run_procs);
 699                 } else if (strncmp(buf, "cpu", 3) == 0) {
 700                         double delta;
 701                         if (isdigit(buf[3])) {
 702                                 idx = atoi(&buf[3]) + 1;
 703                         } else {
 704                                 idx = 0;
 705                         }
 706                         sscanf(buf, stat_template, &(cpu[idx].cpu_user),
 707                                 &(cpu[idx].cpu_nice), &(cpu[idx].cpu_system),
 708                                 &(cpu[idx].cpu_idle), &(cpu[idx].cpu_iowait),
 709                                 &(cpu[idx].cpu_irq), &(cpu[idx].cpu_softirq),
 710                                 &(cpu[idx].cpu_steal));
 711
 712                         cpu[idx].cpu_total = cpu[idx].cpu_user + cpu[idx].cpu_nice +
 713                                 cpu[idx].cpu_system + cpu[idx].cpu_idle +
 714                                 cpu[idx].cpu_iowait + cpu[idx].cpu_irq +
 715                                 cpu[idx].cpu_softirq + cpu[idx].cpu_steal;
 716
 717                         cpu[idx].cpu_active_total = cpu[idx].cpu_total -
 718                                 (cpu[idx].cpu_idle + cpu[idx].cpu_iowait);
 719
 720                         delta = current_update_time - last_update_time;
 721
 722                         if (delta <= 0.001) {
 723                                 break;
 724                         }
 725
 726                         cpu[idx].cpu_val[0] = (cpu[idx].cpu_active_total -
 727                                 cpu[idx].cpu_last_active_total) /
 728                                 (float) (cpu[idx].cpu_total - cpu[idx].cpu_last_total);
 729                         curtmp = 0;
 730 #ifdef HAVE_OPENMP
 731 #pragma omp parallel for reduction(+:curtmp) schedule(dynamic,10)
 732 #endif /* HAVE_OPENMP */
 733                         for (i = 0; i < info.cpu_avg_samples; i++) {
 734                                 curtmp = curtmp + cpu[idx].cpu_val[i];
 735                         }
 736                         /* TESTING -- I've removed this, because I don't think it is right.
 737                          * You shouldn't divide by the cpu count here ...
 738                          * removing for testing */
 739                         /* if (idx == 0) {
 740                                 info.cpu_usage[idx] = curtmp / info.cpu_avg_samples /
 741                                         info.cpu_count;
 742                         } else {
 743                                 info.cpu_usage[idx] = curtmp / info.cpu_avg_samples;
 744                         } */
 745                         /* TESTING -- this line replaces the prev. "suspect" if/else */
 746                         info.cpu_usage[idx] = curtmp / info.cpu_avg_samples;
 747
 748                         cpu[idx].cpu_last_total = cpu[idx].cpu_total;
 749                         cpu[idx].cpu_last_active_total = cpu[idx].cpu_active_total;
 750 #ifdef HAVE_OPENMP
 751 #pragma omp parallel for schedule(dynamic,10)
 752 #endif /* HAVE_OPENMP */
 753                         for (i = info.cpu_avg_samples - 1; i > 0; i--) {
 754                                 cpu[idx].cpu_val[i] = cpu[idx].cpu_val[i - 1];
 755                         }
 756                 }
 757         }
 758         fclose(stat_fp);
 759 }
 760
 761 void update_running_processes(void)
 762 {
 763         update_stat();
 764 }
 765
 766 void update_cpu_usage(void)
 767 {
 768         update_stat();
 769 }
 770
 771 void update_load_average(void)
 772 {
 773 #ifdef HAVE_GETLOADAVG
 774         if (!prefer_proc) {
 775                 double v[3];
 776
 777                 getloadavg(v, 3);
 778                 info.loadavg[0] = (float) v[0];
 779                 info.loadavg[1] = (float) v[1];
 780                 info.loadavg[2] = (float) v[2];
 781         } else
 782 #endif
 783         {
 784                 static int rep = 0;
 785                 FILE *fp;
 786
 787                 if (!(fp = open_file("/proc/loadavg", &rep))) {
 788                         info.loadavg[0] = info.loadavg[1] = info.loadavg[2] = 0.0;
 789                         return;
 790                 }
 791                 fscanf(fp, "%f %f %f", &info.loadavg[0], &info.loadavg[1],
 792                         &info.loadavg[2]);
 793                 fclose(fp);
 794         }
 795 }
 796
 797 #define PROC_I8K "/proc/i8k"
 798 #define I8K_DELIM " "
 799 static char *i8k_procbuf = NULL;
 800 void update_i8k(void)
 801 {
 802         FILE *fp;
 803
 804         if (!i8k_procbuf) {
 805                 i8k_procbuf = (char *) malloc(128 * sizeof(char));
 806         }
 807         if ((fp = fopen(PROC_I8K, "r")) == NULL) {
 808                 CRIT_ERR(NULL, NULL, "/proc/i8k doesn't exist! use insmod to make sure the kernel "
 809                         "driver is loaded...");
 810         }
 811
 812         memset(&i8k_procbuf[0], 0, 128);
 813         if (fread(&i8k_procbuf[0], sizeof(char), 128, fp) == 0) {
 814                 NORM_ERR("something wrong with /proc/i8k...");
 815         }
 816
 817         fclose(fp);
 818
 819         i8k.version = strtok(&i8k_procbuf[0], I8K_DELIM);
 820         i8k.bios = strtok(NULL, I8K_DELIM);
 821         i8k.serial = strtok(NULL, I8K_DELIM);
 822         i8k.cpu_temp = strtok(NULL, I8K_DELIM);
 823         i8k.left_fan_status = strtok(NULL, I8K_DELIM);
 824         i8k.right_fan_status = strtok(NULL, I8K_DELIM);
 825         i8k.left_fan_rpm = strtok(NULL, I8K_DELIM);
 826         i8k.right_fan_rpm = strtok(NULL, I8K_DELIM);
 827         i8k.ac_status = strtok(NULL, I8K_DELIM);
 828         i8k.buttons_status = strtok(NULL, I8K_DELIM);
 829 }
 830
 831 /***********************************************************/
 832 /***********************************************************/
 833 /***********************************************************/
 834
 835 static int no_dots(const struct dirent *d)
 836 {
 837         if (d->d_name[0] == '.') {
 838                 return 0;
 839         }
 840         return 1;
 841 }
 842
 843 static int get_first_file_in_a_directory(const char *dir, char *s, int *rep)
 844 {
 845         struct dirent **namelist;
 846         int i, n;
 847
 848         n = scandir(dir, &namelist, no_dots, alphasort);
 849         if (n < 0) {
 850                 if (!rep || !*rep) {
 851                         NORM_ERR("scandir for %s: %s", dir, strerror(errno));
 852                         if (rep) {
 853                                 *rep = 1;
 854                         }
 855                 }
 856                 return 0;
 857         } else {
 858                 if (n == 0) {
 859                         return 0;
 860                 }
 861
 862                 strncpy(s, namelist[0]->d_name, 255);
 863                 s[255] = '\0';
 864
 865 #ifdef HAVE_OPENMP
 866 #pragma omp parallel for schedule(dynamic,10)
 867 #endif /* HAVE_OPENMP */
 868                 for (i = 0; i < n; i++) {
 869                         free(namelist[i]);
 870                 }
 871                 free(namelist);
 872
 873                 return 1;
 874         }
 875 }
 876
 877 static int open_sysfs_sensor(const char *dir, const char *dev, const char *type, int n,
 878                 int *divisor, char *devtype)
 879 {
 880         char path[256];
 881         char buf[256];
 882         int fd;
 883         int divfd;
 884
 885         memset(buf, 0, sizeof(buf));
 886
 887         /* if device is NULL or *, get first */
 888         if (dev == NULL || strcmp(dev, "*") == 0) {
 889                 static int rep = 0;
 890
 891                 if (!get_first_file_in_a_directory(dir, buf, &rep)) {
 892                         return -1;
 893                 }
 894                 dev = buf;
 895         }
 896
 897         if (strcmp(dir, "/sys/class/hwmon/") == 0) {
 898                 if (*buf) {
 899                         /* buf holds result from get_first_file_in_a_directory() above,
 900                          * e.g. "hwmon0" -- append "/device" */
 901                         strcat(buf, "/device");
 902                 } else {
 903                         /* dev holds device number N as a string,
 904                          * e.g. "0", -- convert to "hwmon0/device" */
 905                         sprintf(buf, "hwmon%s/device", dev);
 906                         dev = buf;
 907                 }
 908         }
 909
 910         /* change vol to in, tempf to temp */
 911         if (strcmp(type, "vol") == 0) {
 912                 type = "in";
 913         } else if (strcmp(type, "tempf") == 0) {
 914                 type = "temp";
 915         }
 916
 917         /* construct path */
 918         snprintf(path, 255, "%s%s/%s%d_input", dir, dev, type, n);
 919
 920         /* first, attempt to open file in /device */
 921         fd = open(path, O_RDONLY);
 922         if (fd < 0) {
 923
 924                 /* if it fails, strip the /device from dev and attempt again */
 925                 buf[strlen(buf) - 7] = 0;
 926                 snprintf(path, 255, "%s%s/%s%d_input", dir, dev, type, n);
 927                 fd = open(path, O_RDONLY);
 928                 if (fd < 0) {
 929                         CRIT_ERR(NULL, NULL, "can't open '%s': %s\nplease check your device or remove this "
 930                                          "var from "PACKAGE_NAME, path, strerror(errno));
 931                 }
 932         }
 933
 934         strncpy(devtype, path, 255);
 935
 936         if (strcmp(type, "in") == 0 || strcmp(type, "temp") == 0
 937                         || strcmp(type, "tempf") == 0) {
 938                 *divisor = 1;
 939         } else {
 940                 *divisor = 0;
 941         }
 942         /* fan does not use *_div as a read divisor */
 943         if (strcmp("fan", type) == 0) {
 944                 return fd;
 945         }
 946
 947         /* test if *_div file exist, open it and use it as divisor */
 948         if (strcmp(type, "tempf") == 0) {
 949                 snprintf(path, 255, "%s%s/%s%d_div", dir, "one", "two", n);
 950         } else {
 951                 snprintf(path, 255, "%s%s/%s%d_div", dir, dev, type, n);
 952         }
 953
 954         divfd = open(path, O_RDONLY);
 955         if (divfd > 0) {
 956                 /* read integer */
 957                 char divbuf[64];
 958                 int divn;
 959
 960                 divn = read(divfd, divbuf, 63);
 961                 /* should read until n == 0 but I doubt that kernel will give these
 962                  * in multiple pieces. :) */
 963                 if (divn < 0) {
 964                         NORM_ERR("open_sysfs_sensor(): can't read from sysfs");
 965                 } else {
 966                         divbuf[divn] = '\0';
 967                         *divisor = atoi(divbuf);
 968                 }
 969                 close(divfd);
 970         }
 971
 972         return fd;
 973 }
 974
 975 static double get_sysfs_info(int *fd, int divisor, char *devtype, char *type)
 976 {
 977         int val = 0;
 978
 979         if (*fd <= 0) {
 980                 return 0;
 981         }
 982
 983         lseek(*fd, 0, SEEK_SET);
 984
 985         /* read integer */
 986         {
 987                 char buf[64];
 988                 int n;
 989                 n = read(*fd, buf, 63);
 990                 /* should read until n == 0 but I doubt that kernel will give these
 991                  * in multiple pieces. :) */
 992                 if (n < 0) {
 993                         NORM_ERR("get_sysfs_info(): read from %s failed\n", devtype);
 994                 } else {
 995                         buf[n] = '\0';
 996                         val = atoi(buf);
 997                 }
 998         }
 999
1000         close(*fd);
1001         /* open file */
1002         *fd = open(devtype, O_RDONLY);
1003         if (*fd < 0) {
1004                 NORM_ERR("can't open '%s': %s", devtype, strerror(errno));
1005         }
1006
1007         /* My dirty hack for computing CPU value
1008          * Filedil, from forums.gentoo.org */
1009         /* if (strstr(devtype, "temp1_input") != NULL) {
1010                 return -15.096 + 1.4893 * (val / 1000.0);
1011         } */
1012
1013         /* divide voltage and temperature by 1000 */
1014         /* or if any other divisor is given, use that */
1015         if (strcmp(type, "tempf") == 0) {
1016                 if (divisor > 1) {
1017                         return ((val / divisor + 40) * 9.0 / 5) - 40;
1018                 } else if (divisor) {
1019                         return ((val / 1000.0 + 40) * 9.0 / 5) - 40;
1020                 } else {
1021                         return ((val + 40) * 9.0 / 5) - 40;
1022                 }
1023         } else {
1024                 if (divisor > 1) {
1025                         return val / divisor;
1026                 } else if (divisor) {
1027                         return val / 1000.0;
1028                 } else {
1029                         return val;
1030                 }
1031         }
1032 }
1033
1034 #define HWMON_RESET() {\
1035                 buf1[0] = 0; \
1036                 factor = 1.0; \
1037                 offset = 0.0; }
1038
1039 static void parse_sysfs_sensor(struct text_object *obj, const char *arg, const char *path, const char *type)
1040 {
1041         char buf1[64], buf2[64];
1042         float factor, offset;
1043         int n, found = 0;
1044         struct sysfs *sf;
1045
1046         if (sscanf(arg, "%63s %d %f %f", buf2, &n, &factor, &offset) == 4) found = 1; else HWMON_RESET();
1047         if (!found && sscanf(arg, "%63s %63s %d %f %f", buf1, buf2, &n, &factor, &offset) == 5) found = 1; else if (!found) HWMON_RESET();
1048         if (!found && sscanf(arg, "%63s %63s %d", buf1, buf2, &n) == 3) found = 1; else if (!found) HWMON_RESET();
1049         if (!found && sscanf(arg, "%63s %d", buf2, &n) == 2) found = 1; else if (!found) HWMON_RESET();
1050
1051         if (!found) {
1052                 NORM_ERR("i2c failed to parse arguments");
1053                 obj->type = OBJ_text;
1054                 return;
1055         }
1056         DBGP("parsed %s args: '%s' '%s' %d %f %f\n", type, buf1, buf2, n, factor, offset);
1057         sf = malloc(sizeof(struct sysfs));
1058         memset(sf, 0, sizeof(struct sysfs));
1059         sf->fd = open_sysfs_sensor(path, (*buf1) ? buf1 : 0, buf2, n,
1060                         &sf->arg, sf->devtype);
1061         strncpy(sf->type, buf2, 63);
1062         sf->factor = factor;
1063         sf->offset = offset;
1064         obj->data.opaque = sf;
1065 }
1066
1067 #define PARSER_GENERATOR(name, path)                                \
1068 void parse_##name##_sensor(struct text_object *obj, const char *arg) \
1069 {                                                                   \
1070         parse_sysfs_sensor(obj, arg, path, #name);           \
1071 }
1072
1073 PARSER_GENERATOR(i2c, "/sys/bus/i2c/devices/")
1074 PARSER_GENERATOR(hwmon, "/sys/class/hwmon/")
1075 PARSER_GENERATOR(platform, "/sys/bus/platform/devices/")
1076
1077 void print_sysfs_sensor(struct text_object *obj, char *p, int p_max_size)
1078 {
1079         double r;
1080         struct sysfs *sf = obj->data.opaque;
1081
1082         if (!sf)
1083                 return;
1084
1085         r = get_sysfs_info(&sf->fd, sf->arg,
1086                         sf->devtype, sf->type);
1087
1088         r = r * sf->factor + sf->offset;
1089
1090         if (!strncmp(sf->type, "temp", 4)) {
1091                 temp_print(p, p_max_size, r, TEMP_CELSIUS);
1092         } else if (r >= 100.0 || r == 0) {
1093                 snprintf(p, p_max_size, "%d", (int) r);
1094         } else {
1095                 snprintf(p, p_max_size, "%.1f", r);
1096         }
1097 }
1098
1099 void free_sysfs_sensor(struct text_object *obj)
1100 {
1101         struct sysfs *sf = obj->data.opaque;
1102
1103         if (!sf)
1104                 return;
1105
1106         close(sf->fd);
1107         free(obj->data.opaque);
1108         obj->data.opaque = NULL;
1109 }
1110
1111 /* Prior to kernel version 2.6.12, the CPU fan speed was available in
1112  * ADT746X_FAN_OLD, whereas later kernel versions provide this information in
1113  * ADT746X_FAN. */
1114 #define ADT746X_FAN "/sys/devices/temperatures/sensor1_fan_speed"
1115 #define ADT746X_FAN_OLD "/sys/devices/temperatures/cpu_fan_speed"
1116
1117 void get_adt746x_fan(char *p_client_buffer, size_t client_buffer_size)
1118 {
1119         static int rep = 0;
1120         char adt746x_fan_state[64];
1121         FILE *fp;
1122
1123         if (!p_client_buffer || client_buffer_size <= 0) {
1124                 return;
1125         }
1126
1127         if ((fp = open_file(ADT746X_FAN, &rep)) == NULL
1128                         && (fp = open_file(ADT746X_FAN_OLD, &rep)) == NULL) {
1129                 sprintf(adt746x_fan_state, "adt746x not found");
1130         } else {
1131                 fgets(adt746x_fan_state, sizeof(adt746x_fan_state), fp);
1132                 adt746x_fan_state[strlen(adt746x_fan_state) - 1] = 0;
1133                 fclose(fp);
1134         }
1135
1136         snprintf(p_client_buffer, client_buffer_size, "%s", adt746x_fan_state);
1137 }
1138
1139 /* Prior to kernel version 2.6.12, the CPU temperature was found in
1140  * ADT746X_CPU_OLD, whereas later kernel versions provide this information in
1141  * ADT746X_CPU. */
1142 #define ADT746X_CPU "/sys/devices/temperatures/sensor1_temperature"
1143 #define ADT746X_CPU_OLD "/sys/devices/temperatures/cpu_temperature"
1144
1145 void get_adt746x_cpu(char *p_client_buffer, size_t client_buffer_size)
1146 {
1147         static int rep = 0;
1148         char adt746x_cpu_state[64];
1149         FILE *fp;
1150
1151         if (!p_client_buffer || client_buffer_size <= 0) {
1152                 return;
1153         }
1154
1155         if ((fp = open_file(ADT746X_CPU, &rep)) == NULL
1156                         && (fp = open_file(ADT746X_CPU_OLD, &rep)) == NULL) {
1157                 sprintf(adt746x_cpu_state, "adt746x not found");
1158         } else {
1159                 fscanf(fp, "%2s", adt746x_cpu_state);
1160                 fclose(fp);
1161         }
1162
1163         snprintf(p_client_buffer, client_buffer_size, "%s", adt746x_cpu_state);
1164 }
1165
1166 #define CPUFREQ_PREFIX "/sys/devices/system/cpu"
1167 #define CPUFREQ_POSTFIX "cpufreq/scaling_cur_freq"
1168
1169 /* return system frequency in MHz (use divisor=1) or GHz (use divisor=1000) */
1170 char get_freq(char *p_client_buffer, size_t client_buffer_size,
1171                 const char *p_format, int divisor, unsigned int cpu)
1172 {
1173         FILE *f;
1174         static int rep = 0;
1175         char frequency[32];
1176         char s[256];
1177         double freq = 0;
1178
1179         if (!p_client_buffer || client_buffer_size <= 0 || !p_format
1180                         || divisor <= 0) {
1181                 return 0;
1182         }
1183
1184         if (!prefer_proc) {
1185                 char current_freq_file[128];
1186
1187                 snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu - 1,
1188                         CPUFREQ_POSTFIX);
1189                 f = fopen(current_freq_file, "r");
1190                 if (f) {
1191                         /* if there's a cpufreq /sys node, read the current frequency from
1192                          * this node and divide by 1000 to get Mhz. */
1193                         if (fgets(s, sizeof(s), f)) {
1194                                 s[strlen(s) - 1] = '\0';
1195                                 freq = strtod(s, NULL);
1196                         }
1197                         fclose(f);
1198                         snprintf(p_client_buffer, client_buffer_size, p_format,
1199                                 (freq / 1000) / divisor);
1200                         return 1;
1201                 }
1202         }
1203
1204         // open the CPU information file
1205         f = open_file("/proc/cpuinfo", &rep);
1206         if (!f) {
1207                 perror(PACKAGE_NAME": Failed to access '/proc/cpuinfo' at get_freq()");
1208                 return 0;
1209         }
1210
1211         // read the file
1212         while (fgets(s, sizeof(s), f) != NULL) {
1213
1214 #if defined(__i386) || defined(__x86_64)
1215                 // and search for the cpu mhz
1216                 if (strncmp(s, "cpu MHz", 7) == 0 && cpu == 0) {
1217 #else
1218 #if defined(__alpha)
1219                 // different on alpha
1220                 if (strncmp(s, "cycle frequency [Hz]", 20) == 0 && cpu == 0) {
1221 #else
1222                 // this is different on ppc for some reason
1223                 if (strncmp(s, "clock", 5) == 0 && cpu == 0) {
1224 #endif // defined(__alpha)
1225 #endif // defined(__i386) || defined(__x86_64)
1226
1227                         // copy just the number
1228                         strcpy(frequency, strchr(s, ':') + 2);
1229 #if defined(__alpha)
1230                         // strip " est.\n"
1231                         frequency[strlen(frequency) - 6] = '\0';
1232                         // kernel reports in Hz
1233                         freq = strtod(frequency, NULL) / 1000000;
1234 #else
1235                         // strip \n
1236                         frequency[strlen(frequency) - 1] = '\0';
1237                         freq = strtod(frequency, NULL);
1238 #endif
1239                         break;
1240                 }
1241                 if (strncmp(s, "processor", 9) == 0) {
1242                         cpu--;
1243                         continue;
1244                 }
1245         }
1246
1247         fclose(f);
1248         snprintf(p_client_buffer, client_buffer_size, p_format,
1249                 (float) freq / divisor);
1250         return 1;
1251 }
1252
1253 #define CPUFREQ_VOLTAGE "cpufreq/scaling_voltages"
1254
1255 /* /sys/devices/system/cpu/cpu0/cpufreq/scaling_voltages looks something
1256  * like this:
1257 # frequency voltage
1258 1800000 1340
1259 1600000 1292
1260 1400000 1100
1261 1200000 988
1262 1000000 1116
1263 800000 1004
1264 600000 988
1265  * Peter Tarjan (ptarjan@citromail.hu) */
1266
1267 /* return cpu voltage in mV (use divisor=1) or V (use divisor=1000) */
1268 char get_voltage(char *p_client_buffer, size_t client_buffer_size,
1269                 const char *p_format, int divisor, unsigned int cpu)
1270 {
1271         FILE *f;
1272         char s[256];
1273         int freq = 0;
1274         int voltage = 0;
1275         char current_freq_file[128];
1276         int freq_comp = 0;
1277
1278         /* build the voltage file name */
1279         cpu--;
1280         snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu,
1281                 CPUFREQ_POSTFIX);
1282
1283         if (!p_client_buffer || client_buffer_size <= 0 || !p_format
1284                         || divisor <= 0) {
1285                 return 0;
1286         }
1287
1288         /* read the current cpu frequency from the /sys node */
1289         f = fopen(current_freq_file, "r");
1290         if (f) {
1291                 if (fgets(s, sizeof(s), f)) {
1292                         s[strlen(s) - 1] = '\0';
1293                         freq = strtod(s, NULL);
1294                 }
1295                 fclose(f);
1296         } else {
1297                 fprintf(stderr, PACKAGE_NAME": Failed to access '%s' at ", current_freq_file);
1298                 perror("get_voltage()");
1299                 if (f) {
1300                         fclose(f);
1301                 }
1302                 return 0;
1303         }
1304
1305         snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu,
1306                 CPUFREQ_VOLTAGE);
1307
1308         /* use the current cpu frequency to find the corresponding voltage */
1309         f = fopen(current_freq_file, "r");
1310
1311         if (f) {
1312                 while (!feof(f)) {
1313                         char line[256];
1314
1315                         if (fgets(line, 255, f) == NULL) {
1316                                 break;
1317                         }
1318                         sscanf(line, "%d %d", &freq_comp, &voltage);
1319                         if (freq_comp == freq) {
1320                                 break;
1321                         }
1322                 }
1323                 fclose(f);
1324         } else {
1325                 fprintf(stderr, PACKAGE_NAME": Failed to access '%s' at ", current_freq_file);
1326                 perror("get_voltage()");
1327                 if (f) {
1328                         fclose(f);
1329                 }
1330                 return 0;
1331         }
1332         snprintf(p_client_buffer, client_buffer_size, p_format,
1333                 (float) voltage / divisor);
1334         return 1;
1335 }
1336
1337 #define ACPI_FAN_DIR "/proc/acpi/fan/"
1338
1339 void get_acpi_fan(char *p_client_buffer, size_t client_buffer_size)
1340 {
1341         static int rep = 0;
1342         char buf[256];
1343         char buf2[256];
1344         FILE *fp;
1345
1346         if (!p_client_buffer || client_buffer_size <= 0) {
1347                 return;
1348         }
1349
1350         /* yeah, slow... :/ */
1351         if (!get_first_file_in_a_directory(ACPI_FAN_DIR, buf, &rep)) {
1352                 snprintf(p_client_buffer, client_buffer_size, "no fans?");
1353                 return;
1354         }
1355
1356         snprintf(buf2, sizeof(buf2), "%s%s/state", ACPI_FAN_DIR, buf);
1357
1358         fp = open_file(buf2, &rep);
1359         if (!fp) {
1360                 snprintf(p_client_buffer, client_buffer_size,
1361                         "can't open fan's state file");
1362                 return;
1363         }
1364         memset(buf, 0, sizeof(buf));
1365         fscanf(fp, "%*s %99s", buf);
1366         fclose(fp);
1367
1368         snprintf(p_client_buffer, client_buffer_size, "%s", buf);
1369 }
1370
1371 #define SYSFS_AC_ADAPTER_DIR "/sys/class/power_supply/AC"
1372 #define ACPI_AC_ADAPTER_DIR "/proc/acpi/ac_adapter/"
1373 /* Linux 2.6.25 onwards ac adapter info is in
1374    /sys/class/power_supply/AC/
1375    On my system I get the following.
1376      /sys/class/power_supply/AC/uevent:
1377      PHYSDEVPATH=/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:01/PNP0C09:00/ACPI0003:00
1378      PHYSDEVBUS=acpi
1379      PHYSDEVDRIVER=ac
1380      POWER_SUPPLY_NAME=AC
1381      POWER_SUPPLY_TYPE=Mains
1382      POWER_SUPPLY_ONLINE=1
1383 */
1384
1385 void get_acpi_ac_adapter(char *p_client_buffer, size_t client_buffer_size)
1386 {
1387         static int rep = 0;
1388
1389         char buf[256];
1390         char buf2[256];
1391         FILE *fp;
1392
1393         if (!p_client_buffer || client_buffer_size <= 0) {
1394                 return;
1395         }
1396
1397         snprintf(buf2, sizeof(buf2), "%s/uevent", SYSFS_AC_ADAPTER_DIR);
1398         fp = open_file(buf2, &rep);
1399         if (fp) {
1400                 /* sysfs processing */
1401                 while (!feof(fp)) {
1402                         if (fgets(buf, sizeof(buf), fp) == NULL)
1403                                 break;
1404
1405                         if (strncmp(buf, "POWER_SUPPLY_ONLINE=", 20) == 0) {
1406                                 int online = 0;
1407                                 sscanf(buf, "POWER_SUPPLY_ONLINE=%d", &online);
1408                                 snprintf(p_client_buffer, client_buffer_size,
1409                                          "%s-line", (online ? "on" : "off"));
1410                                 break;
1411                         }
1412                 }
1413                 fclose(fp);
1414         } else {
1415                 /* yeah, slow... :/ */
1416                 if (!get_first_file_in_a_directory(ACPI_AC_ADAPTER_DIR, buf, &rep)) {
1417                         snprintf(p_client_buffer, client_buffer_size, "no ac_adapters?");
1418                         return;
1419                 }
1420
1421                 snprintf(buf2, sizeof(buf2), "%s%s/state", ACPI_AC_ADAPTER_DIR, buf);
1422
1423                 fp = open_file(buf2, &rep);
1424                 if (!fp) {
1425                         snprintf(p_client_buffer, client_buffer_size,
1426                                  "No ac adapter found.... where is it?");
1427                         return;
1428                 }
1429                 memset(buf, 0, sizeof(buf));
1430                 fscanf(fp, "%*s %99s", buf);
1431                 fclose(fp);
1432
1433                 snprintf(p_client_buffer, client_buffer_size, "%s", buf);
1434         }
1435 }
1436
1437 /*
1438 /proc/acpi/thermal_zone/THRM/cooling_mode
1439 cooling mode:            active
1440 /proc/acpi/thermal_zone/THRM/polling_frequency
1441 <polling disabled>
1442 /proc/acpi/thermal_zone/THRM/state
1443 state:                   ok
1444 /proc/acpi/thermal_zone/THRM/temperature
1445 temperature:             45 C
1446 /proc/acpi/thermal_zone/THRM/trip_points
1447 critical (S5):           73 C
1448 passive:                 73 C: tc1=4 tc2=3 tsp=40 devices=0xcdf6e6c0
1449 */
1450
1451 #define ACPI_THERMAL_DIR "/proc/acpi/thermal_zone/"
1452 #define ACPI_THERMAL_FORMAT "/proc/acpi/thermal_zone/%s/temperature"
1453
1454 int open_acpi_temperature(const char *name)
1455 {
1456         char path[256];
1457         char buf[256];
1458         int fd;
1459
1460         if (name == NULL || strcmp(name, "*") == 0) {
1461                 static int rep = 0;
1462
1463                 if (!get_first_file_in_a_directory(ACPI_THERMAL_DIR, buf, &rep)) {
1464                         return -1;
1465                 }
1466                 name = buf;
1467         }
1468
1469         snprintf(path, 255, ACPI_THERMAL_FORMAT, name);
1470
1471         fd = open(path, O_RDONLY);
1472         if (fd < 0) {
1473                 NORM_ERR("can't open '%s': %s", path, strerror(errno));
1474         }
1475
1476         return fd;
1477 }
1478
1479 static double last_acpi_temp;
1480 static double last_acpi_temp_time;
1481
1482 double get_acpi_temperature(int fd)
1483 {
1484         if (fd <= 0) {
1485                 return 0;
1486         }
1487
1488         /* don't update acpi temperature too often */
1489         if (current_update_time - last_acpi_temp_time < 11.32) {
1490                 return last_acpi_temp;
1491         }
1492         last_acpi_temp_time = current_update_time;
1493
1494         /* seek to beginning */
1495         lseek(fd, 0, SEEK_SET);
1496
1497         /* read */
1498         {
1499                 char buf[256];
1500                 int n;
1501
1502                 n = read(fd, buf, 255);
1503                 if (n < 0) {
1504                         NORM_ERR("can't read fd %d: %s", fd, strerror(errno));
1505                 } else {
1506                         buf[n] = '\0';
1507                         sscanf(buf, "temperature: %lf", &last_acpi_temp);
1508                 }
1509         }
1510
1511         return last_acpi_temp;
1512 }
1513
1514 /*
1515 hipo@lepakko hipo $ cat /proc/acpi/battery/BAT1/info
1516 present:                 yes
1517 design capacity:         4400 mAh
1518 last full capacity:      4064 mAh
1519 battery technology:      rechargeable
1520 design voltage:          14800 mV
1521 design capacity warning: 300 mAh
1522 design capacity low:     200 mAh
1523 capacity granularity 1:  32 mAh
1524 capacity granularity 2:  32 mAh
1525 model number:            02KT
1526 serial number:           16922
1527 battery type:            LION
1528 OEM info:                SANYO
1529 */
1530
1531 /*
1532 hipo@lepakko conky $ cat /proc/acpi/battery/BAT1/state
1533 present:                 yes
1534 capacity state:          ok
1535 charging state:          unknown
1536 present rate:            0 mA
1537 remaining capacity:      4064 mAh
1538 present voltage:         16608 mV
1539 */
1540
1541 /*
1542 2213<@jupet�kellari��> jupet@lagi-unstable:~$ cat /proc/apm
1543 2213<@jupet�kellari��> 1.16 1.2 0x03 0x01 0xff 0x10 -1% -1 ?
1544 2213<@jupet�kellari��> (-1 ollee ei akkua kiinni, koska akku on p�yd�ll�)
1545 2214<@jupet�kellari��> jupet@lagi-unstable:~$ cat /proc/apm
1546 2214<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x03 0x09 98% -1 ?
1547
1548 2238<@jupet�kellari��> 1.16 1.2 0x03 0x00 0x00 0x01 100% -1 ? ilman verkkovirtaa
1549 2239<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x00 0x01 99% -1 ? verkkovirralla
1550
1551 2240<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x03 0x09 100% -1 ? verkkovirralla ja monitori p��ll�
1552 2241<@jupet�kellari��> 1.16 1.2 0x03 0x00 0x00 0x01 99% -1 ? monitori p��ll� mutta ilman verkkovirtaa
1553 */
1554
1555 /* Kapil Hari Paranjape <kapil@imsc.res.in>
1556   Linux 2.6.24 onwards battery info is in
1557   /sys/class/power_supply/BAT0/
1558   On my system I get the following.
1559         /sys/class/power_supply/BAT0/uevent:
1560         PHYSDEVPATH=/devices/LNXSYSTM:00/device:00/PNP0A03:00/device:01/PNP0C09:00/PNP0C0A:00
1561         PHYSDEVBUS=acpi
1562         PHYSDEVDRIVER=battery
1563         POWER_SUPPLY_NAME=BAT0
1564         POWER_SUPPLY_TYPE=Battery
1565         POWER_SUPPLY_STATUS=Discharging
1566         POWER_SUPPLY_PRESENT=1
1567         POWER_SUPPLY_TECHNOLOGY=Li-ion
1568         POWER_SUPPLY_VOLTAGE_MIN_DESIGN=10800000
1569         POWER_SUPPLY_VOLTAGE_NOW=10780000
1570         POWER_SUPPLY_CURRENT_NOW=13970000
1571         POWER_SUPPLY_ENERGY_FULL_DESIGN=47510000
1572         POWER_SUPPLY_ENERGY_FULL=27370000
1573         POWER_SUPPLY_ENERGY_NOW=11810000
1574         POWER_SUPPLY_MODEL_NAME=IBM-92P1060
1575         POWER_SUPPLY_MANUFACTURER=Panasonic
1576   On some systems POWER_SUPPLY_ENERGY_* is replaced by POWER_SUPPLY_CHARGE_*
1577 */
1578
1579 #define SYSFS_BATTERY_BASE_PATH "/sys/class/power_supply"
1580 #define ACPI_BATTERY_BASE_PATH "/proc/acpi/battery"
1581 #define APM_PATH "/proc/apm"
1582 #define MAX_BATTERY_COUNT 4
1583
1584 static FILE *sysfs_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1585 static FILE *acpi_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1586 static FILE *apm_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1587
1588 static int batteries_initialized = 0;
1589 static char batteries[MAX_BATTERY_COUNT][32];
1590
1591 static int acpi_last_full[MAX_BATTERY_COUNT];
1592 static int acpi_design_capacity[MAX_BATTERY_COUNT];
1593
1594 /* e.g. "charging 75%" */
1595 static char last_battery_str[MAX_BATTERY_COUNT][64];
1596 /* e.g. "3h 15m" */
1597 static char last_battery_time_str[MAX_BATTERY_COUNT][64];
1598
1599 static double last_battery_time[MAX_BATTERY_COUNT];
1600
1601 static int last_battery_perct[MAX_BATTERY_COUNT];
1602 static double last_battery_perct_time[MAX_BATTERY_COUNT];
1603
1604 void init_batteries(void)
1605 {
1606         int idx;
1607
1608         if (batteries_initialized) {
1609                 return;
1610         }
1611 #ifdef HAVE_OPENMP
1612 #pragma omp parallel for schedule(dynamic,10)
1613 #endif /* HAVE_OPENMP */
1614         for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) {
1615                 batteries[idx][0] = '\0';
1616         }
1617         batteries_initialized = 1;
1618 }
1619
1620 int get_battery_idx(const char *bat)
1621 {
1622         int idx;
1623
1624         for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) {
1625                 if (!strlen(batteries[idx]) || !strcmp(batteries[idx], bat)) {
1626                         break;
1627                 }
1628         }
1629
1630         /* if not found, enter a new entry */
1631         if (!strlen(batteries[idx])) {
1632                 snprintf(batteries[idx], 31, "%s", bat);
1633         }
1634
1635         return idx;
1636 }
1637
1638 void set_return_value(char *buffer, unsigned int n, int item, int idx);
1639
1640 void get_battery_stuff(char *buffer, unsigned int n, const char *bat, int item)
1641 {
1642         static int idx, rep = 0, rep1 = 0, rep2 = 0;
1643         char acpi_path[128];
1644         char sysfs_path[128];
1645
1646         snprintf(acpi_path, 127, ACPI_BATTERY_BASE_PATH "/%s/state", bat);
1647         snprintf(sysfs_path, 127, SYSFS_BATTERY_BASE_PATH "/%s/uevent", bat);
1648
1649         init_batteries();
1650
1651         idx = get_battery_idx(bat);
1652
1653         /* don't update battery too often */
1654         if (current_update_time - last_battery_time[idx] < 29.5) {
1655                 set_return_value(buffer, n, item, idx);
1656                 return;
1657         }
1658
1659         last_battery_time[idx] = current_update_time;
1660
1661         memset(last_battery_str[idx], 0, sizeof(last_battery_str[idx]));
1662         memset(last_battery_time_str[idx], 0, sizeof(last_battery_time_str[idx]));
1663
1664         /* first try SYSFS if that fails try ACPI */
1665
1666         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1667                 sysfs_bat_fp[idx] = open_file(sysfs_path, &rep);
1668         }
1669
1670         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1671                 acpi_bat_fp[idx] = open_file(acpi_path, &rep1);
1672         }
1673
1674         if (sysfs_bat_fp[idx] != NULL) {
1675                 /* SYSFS */
1676                 int present_rate = -1;
1677                 int remaining_capacity = -1;
1678                 char charging_state[64];
1679                 char present[4];
1680
1681                 strcpy(charging_state, "unknown");
1682
1683                 while (!feof(sysfs_bat_fp[idx])) {
1684                         char buf[256];
1685                         if (fgets(buf, 256, sysfs_bat_fp[idx]) == NULL)
1686                                 break;
1687
1688                         /* let's just hope units are ok */
1689                         if (strncmp (buf, "POWER_SUPPLY_PRESENT=1", 22) == 0)
1690                                 strcpy(present, "yes");
1691                         else if (strncmp (buf, "POWER_SUPPLY_PRESENT=0", 22) == 0)
1692                                 strcpy(present, "no");
1693                         else if (strncmp (buf, "POWER_SUPPLY_STATUS=", 20) == 0)
1694                                 sscanf(buf, "POWER_SUPPLY_STATUS=%63s", charging_state);
1695                         /* present_rate is not the same as the
1696                         current flowing now but it is the same value
1697                         which was used in the past. so we continue
1698                         the tradition! */
1699                         else if (strncmp(buf, "POWER_SUPPLY_CURRENT_NOW=", 25) == 0)
1700                                 sscanf(buf, "POWER_SUPPLY_CURRENT_NOW=%d", &present_rate);
1701                         else if (strncmp(buf, "POWER_SUPPLY_ENERGY_NOW=", 24) == 0)
1702                                 sscanf(buf, "POWER_SUPPLY_ENERGY_NOW=%d", &remaining_capacity);
1703                         else if (strncmp(buf, "POWER_SUPPLY_ENERGY_FULL=", 25) == 0)
1704                                 sscanf(buf, "POWER_SUPPLY_ENERGY_FULL=%d", &acpi_last_full[idx]);
1705                         else if (strncmp(buf, "POWER_SUPPLY_CHARGE_NOW=", 24) == 0)
1706                                 sscanf(buf, "POWER_SUPPLY_CHARGE_NOW=%d", &remaining_capacity);
1707                         else if (strncmp(buf, "POWER_SUPPLY_CHARGE_FULL=", 25) == 0)
1708                                 sscanf(buf, "POWER_SUPPLY_CHARGE_FULL=%d", &acpi_last_full[idx]);
1709                 }
1710
1711                 fclose(sysfs_bat_fp[idx]);
1712                 sysfs_bat_fp[idx] = NULL;
1713
1714                 /* Hellf[i]re notes that remaining capacity can exceed acpi_last_full */
1715                 if (remaining_capacity > acpi_last_full[idx])
1716                         acpi_last_full[idx] = remaining_capacity;  /* normalize to 100% */
1717
1718                 /* not present */
1719                 if (strcmp(present, "No") == 0) {
1720                         strncpy(last_battery_str[idx], "not present", 64);
1721                 }
1722                 /* charging */
1723                 else if (strcmp(charging_state, "Charging") == 0) {
1724                         if (acpi_last_full[idx] != 0 && present_rate > 0) {
1725                                 /* e.g. charging 75% */
1726                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "charging %i%%",
1727                                         (int) (((float) remaining_capacity / acpi_last_full[idx]) * 100 ));
1728                                 /* e.g. 2h 37m */
1729                                 format_seconds(last_battery_time_str[idx], sizeof(last_battery_time_str[idx])-1,
1730                                               (long) (((float)(acpi_last_full[idx] - remaining_capacity) / present_rate) * 3600));
1731                         } else if (acpi_last_full[idx] != 0 && present_rate <= 0) {
1732                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "charging %d%%",
1733                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1734                                 snprintf(last_battery_time_str[idx],
1735                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1736                         } else {
1737                                 strncpy(last_battery_str[idx], "charging", sizeof(last_battery_str[idx])-1);
1738                                 snprintf(last_battery_time_str[idx],
1739                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1740                         }
1741                 }
1742                 /* discharging */
1743                 else if (strncmp(charging_state, "Discharging", 64) == 0) {
1744                         if (present_rate > 0) {
1745                                 /* e.g. discharging 35% */
1746                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "discharging %i%%",
1747                                         (int) (((float) remaining_capacity / acpi_last_full[idx]) * 100 ));
1748                                 /* e.g. 1h 12m */
1749                                 format_seconds(last_battery_time_str[idx], sizeof(last_battery_time_str[idx])-1,
1750                                               (long) (((float) remaining_capacity / present_rate) * 3600));
1751                         } else if (present_rate == 0) { /* Thanks to Nexox for this one */
1752                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "full");
1753                                 snprintf(last_battery_time_str[idx],
1754                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1755                         } else {
1756                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1,
1757                                         "discharging %d%%",
1758                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1759                                 snprintf(last_battery_time_str[idx],
1760                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1761                         }
1762                 }
1763                 /* charged */
1764                 /* thanks to Lukas Zapletal <lzap@seznam.cz> */
1765                 else if (strncmp(charging_state, "Charged", 64) == 0 || strncmp(charging_state, "Full", 64) == 0) {
1766                                 /* Below happens with the second battery on my X40,
1767                                  * when the second one is empty and the first one
1768                                  * being charged. */
1769                                 if (remaining_capacity == 0)
1770                                         strcpy(last_battery_str[idx], "empty");
1771                                 else
1772                                         strcpy(last_battery_str[idx], "charged");
1773                 }
1774                 /* unknown, probably full / AC */
1775                 else {
1776                         if (acpi_last_full[idx] != 0
1777                             && remaining_capacity != acpi_last_full[idx])
1778                                 snprintf(last_battery_str[idx], 64, "unknown %d%%",
1779                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1780                         else
1781                                 strncpy(last_battery_str[idx], "AC", 64);
1782                 }
1783         } else if (acpi_bat_fp[idx] != NULL) {
1784                 /* ACPI */
1785                 int present_rate = -1;
1786                 int remaining_capacity = -1;
1787                 char charging_state[64];
1788                 char present[4];
1789
1790                 /* read last full capacity if it's zero */
1791                 if (acpi_last_full[idx] == 0) {
1792                         static int rep3 = 0;
1793                         char path[128];
1794                         FILE *fp;
1795
1796                         snprintf(path, 127, ACPI_BATTERY_BASE_PATH "/%s/info", bat);
1797                         fp = open_file(path, &rep3);
1798                         if (fp != NULL) {
1799                                 while (!feof(fp)) {
1800                                         char b[256];
1801
1802                                         if (fgets(b, 256, fp) == NULL) {
1803                                                 break;
1804                                         }
1805                                         if (sscanf(b, "last full capacity: %d",
1806                                                                 &acpi_last_full[idx]) != 0) {
1807                                                 break;
1808                                         }
1809                                 }
1810
1811                                 fclose(fp);
1812                         }
1813                 }
1814
1815                 fseek(acpi_bat_fp[idx], 0, SEEK_SET);
1816
1817                 strcpy(charging_state, "unknown");
1818
1819                 while (!feof(acpi_bat_fp[idx])) {
1820                         char buf[256];
1821
1822                         if (fgets(buf, 256, acpi_bat_fp[idx]) == NULL) {
1823                                 break;
1824                         }
1825
1826                         /* let's just hope units are ok */
1827                         if (strncmp(buf, "present:", 8) == 0) {
1828                                 sscanf(buf, "present: %4s", present);
1829                         } else if (strncmp(buf, "charging state:", 15) == 0) {
1830                                 sscanf(buf, "charging state: %63s", charging_state);
1831                         } else if (strncmp(buf, "present rate:", 13) == 0) {
1832                                 sscanf(buf, "present rate: %d", &present_rate);
1833                         } else if (strncmp(buf, "remaining capacity:", 19) == 0) {
1834                                 sscanf(buf, "remaining capacity: %d", &remaining_capacity);
1835                         }
1836                 }
1837                 /* Hellf[i]re notes that remaining capacity can exceed acpi_last_full */
1838                 if (remaining_capacity > acpi_last_full[idx]) {
1839                         /* normalize to 100% */
1840                         acpi_last_full[idx] = remaining_capacity;
1841                 }
1842
1843                 /* not present */
1844                 if (strcmp(present, "no") == 0) {
1845                         strncpy(last_battery_str[idx], "not present", 64);
1846                         /* charging */
1847                 } else if (strcmp(charging_state, "charging") == 0) {
1848                         if (acpi_last_full[idx] != 0 && present_rate > 0) {
1849                                 /* e.g. charging 75% */
1850                                 snprintf(last_battery_str[idx],
1851                                                 sizeof(last_battery_str[idx]) - 1, "charging %i%%",
1852                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1853                                 /* e.g. 2h 37m */
1854                                 format_seconds(last_battery_time_str[idx],
1855                                                 sizeof(last_battery_time_str[idx]) - 1,
1856                                                 (long) (((acpi_last_full[idx] - remaining_capacity) *
1857                                                                 3600) / present_rate));
1858                         } else if (acpi_last_full[idx] != 0 && present_rate <= 0) {
1859                                 snprintf(last_battery_str[idx],
1860                                                 sizeof(last_battery_str[idx]) - 1, "charging %d%%",
1861                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1862                                 snprintf(last_battery_time_str[idx],
1863                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1864                         } else {
1865                                 strncpy(last_battery_str[idx], "charging",
1866                                                 sizeof(last_battery_str[idx]) - 1);
1867                                 snprintf(last_battery_time_str[idx],
1868                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1869                         }
1870                         /* discharging */
1871                 } else if (strncmp(charging_state, "discharging", 64) == 0) {
1872                         if (present_rate > 0) {
1873                                 /* e.g. discharging 35% */
1874                                 snprintf(last_battery_str[idx],
1875                                                 sizeof(last_battery_str[idx]) - 1, "discharging %i%%",
1876                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1877                                 /* e.g. 1h 12m */
1878                                 format_seconds(last_battery_time_str[idx],
1879                                                 sizeof(last_battery_time_str[idx]) - 1,
1880                                                 (long) ((remaining_capacity * 3600) / present_rate));
1881                         } else if (present_rate == 0) { /* Thanks to Nexox for this one */
1882                                 snprintf(last_battery_str[idx],
1883                                                 sizeof(last_battery_str[idx]) - 1, "full");
1884                                 snprintf(last_battery_time_str[idx],
1885                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1886                         } else {
1887                                 snprintf(last_battery_str[idx],
1888                                                 sizeof(last_battery_str[idx]) - 1, "discharging %d%%",
1889                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1890                                 snprintf(last_battery_time_str[idx],
1891                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1892                         }
1893                         /* charged */
1894                 } else if (strncmp(charging_state, "charged", 64) == 0) {
1895                         /* thanks to Lukas Zapletal <lzap@seznam.cz> */
1896                         /* Below happens with the second battery on my X40,
1897                          * when the second one is empty and the first one being charged. */
1898                         if (remaining_capacity == 0) {
1899                                 strcpy(last_battery_str[idx], "empty");
1900                         } else {
1901                                 strcpy(last_battery_str[idx], "charged");
1902                         }
1903                         /* unknown, probably full / AC */
1904                 } else {
1905                         if (strncmp(charging_state, "Full", 64) == 0) {
1906                                 strncpy(last_battery_str[idx], "full", 64);
1907                         } else if (acpi_last_full[idx] != 0
1908                                         && remaining_capacity != acpi_last_full[idx]) {
1909                                 snprintf(last_battery_str[idx], 64, "unknown %d%%",
1910                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1911                         } else {
1912                                 strncpy(last_battery_str[idx], "AC", 64);
1913                         }
1914                 }
1915                 fclose(acpi_bat_fp[idx]);
1916                 acpi_bat_fp[idx] = NULL;
1917         } else {
1918                 /* APM */
1919                 if (apm_bat_fp[idx] == NULL) {
1920                         apm_bat_fp[idx] = open_file(APM_PATH, &rep2);
1921                 }
1922
1923                 if (apm_bat_fp[idx] != NULL) {
1924                         unsigned int ac, status, flag;
1925                         int life;
1926
1927                         fscanf(apm_bat_fp[idx], "%*s %*s %*x %x   %x       %x     %d%%",
1928                                 &ac, &status, &flag, &life);
1929
1930                         if (life == -1) {
1931                                 /* could check now that there is ac */
1932                                 snprintf(last_battery_str[idx], 64, "AC");
1933
1934                         /* could check that status == 3 here? */
1935                         } else if (ac && life != 100) {
1936                                 snprintf(last_battery_str[idx], 64, "charging %d%%", life);
1937                         } else {
1938                                 snprintf(last_battery_str[idx], 64, "%d%%", life);
1939                         }
1940
1941                         /* it seemed to buffer it so file must be closed (or could use
1942                          * syscalls directly but I don't feel like coding it now) */
1943                         fclose(apm_bat_fp[idx]);
1944                         apm_bat_fp[idx] = NULL;
1945                 }
1946         }
1947         set_return_value(buffer, n, item, idx);
1948 }
1949
1950 void set_return_value(char *buffer, unsigned int n, int item, int idx)
1951 {
1952         switch (item) {
1953                 case BATTERY_STATUS:
1954                         snprintf(buffer, n, "%s", last_battery_str[idx]);
1955                         break;
1956                 case BATTERY_TIME:
1957                         snprintf(buffer, n, "%s", last_battery_time_str[idx]);
1958                         break;
1959                 default:
1960                         break;
1961         }
1962 }
1963
1964 void get_battery_short_status(char *buffer, unsigned int n, const char *bat)
1965 {
1966         get_battery_stuff(buffer, n, bat, BATTERY_STATUS);
1967         if (0 == strncmp("charging", buffer, 8)) {
1968                 buffer[0] = 'C';
1969                 memmove(buffer + 1, buffer + 8, n - 8);
1970         } else if (0 == strncmp("discharging", buffer, 11)) {
1971                 buffer[0] = 'D';
1972                 memmove(buffer + 1, buffer + 11, n - 11);
1973         } else if (0 == strncmp("charged", buffer, 7)) {
1974                 buffer[0] = 'F';
1975                 memmove(buffer + 1, buffer + 7, n - 7);
1976         } else if (0 == strncmp("not present", buffer, 11)) {
1977                 buffer[0] = 'N';
1978                 memmove(buffer + 1, buffer + 11, n - 11);
1979         } else if (0 == strncmp("empty", buffer, 5)) {
1980                 buffer[0] = 'E';
1981                 memmove(buffer + 1, buffer + 5, n - 5);
1982         } else if (0 != strncmp("AC", buffer, 2)) {
1983                 buffer[0] = 'U';
1984                 memmove(buffer + 1, buffer + 11, n - 11);
1985         }
1986 }
1987
1988 int get_battery_perct(const char *bat)
1989 {
1990         static int rep = 0;
1991         int idx;
1992         char acpi_path[128];
1993         char sysfs_path[128];
1994         int remaining_capacity = -1;
1995
1996         snprintf(acpi_path, 127, ACPI_BATTERY_BASE_PATH "/%s/state", bat);
1997         snprintf(sysfs_path, 127, SYSFS_BATTERY_BASE_PATH "/%s/uevent", bat);
1998
1999         init_batteries();
2000
2001         idx = get_battery_idx(bat);
2002
2003         /* don't update battery too often */
2004         if (current_update_time - last_battery_perct_time[idx] < 30) {
2005                 return last_battery_perct[idx];
2006         }
2007         last_battery_perct_time[idx] = current_update_time;
2008
2009         /* Only check for SYSFS or ACPI */
2010
2011         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
2012                 sysfs_bat_fp[idx] = open_file(sysfs_path, &rep);
2013                 rep = 0;
2014         }
2015
2016         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
2017                 acpi_bat_fp[idx] = open_file(acpi_path, &rep);
2018         }
2019
2020         if (sysfs_bat_fp[idx] != NULL) {
2021                 /* SYSFS */
2022                 while (!feof(sysfs_bat_fp[idx])) {
2023                         char buf[256];
2024                         if (fgets(buf, 256, sysfs_bat_fp[idx]) == NULL)
2025                                 break;
2026
2027                         if (strncmp(buf, "POWER_SUPPLY_CHARGE_NOW=", 24) == 0) {
2028                                 sscanf(buf, "POWER_SUPPLY_CHARGE_NOW=%d", &remaining_capacity);
2029                         } else if (strncmp(buf, "POWER_SUPPLY_CHARGE_FULL=",25) == 0) {
2030                                 sscanf(buf, "POWER_SUPPLY_CHARGE_FULL=%d", &acpi_design_capacity[idx]);
2031                         } else if (strncmp(buf, "POWER_SUPPLY_ENERGY_NOW=", 24) == 0) {
2032                                 sscanf(buf, "POWER_SUPPLY_ENERGY_NOW=%d", &remaining_capacity);
2033                         } else if (strncmp(buf, "POWER_SUPPLY_ENERGY_FULL=",25) == 0) {
2034                                 sscanf(buf, "POWER_SUPPLY_ENERGY_FULL=%d", &acpi_design_capacity[idx]);
2035                         }
2036                 }
2037
2038                 fclose(sysfs_bat_fp[idx]);
2039                 sysfs_bat_fp[idx] = NULL;
2040
2041         } else if (acpi_bat_fp[idx] != NULL) {
2042                 /* ACPI */
2043                 /* read last full capacity if it's zero */
2044                 if (acpi_design_capacity[idx] == 0) {
2045                         static int rep2;
2046                         char path[128];
2047                         FILE *fp;
2048
2049                         snprintf(path, 127, ACPI_BATTERY_BASE_PATH "/%s/info", bat);
2050                         fp = open_file(path, &rep2);
2051                         if (fp != NULL) {
2052                                 while (!feof(fp)) {
2053                                         char b[256];
2054
2055                                         if (fgets(b, 256, fp) == NULL) {
2056                                                 break;
2057                                         }
2058                                         if (sscanf(b, "last full capacity: %d",
2059                                                                 &acpi_design_capacity[idx]) != 0) {
2060                                                 break;
2061                                         }
2062                                 }
2063                                 fclose(fp);
2064                         }
2065                 }
2066
2067                 fseek(acpi_bat_fp[idx], 0, SEEK_SET);
2068
2069                 while (!feof(acpi_bat_fp[idx])) {
2070                         char buf[256];
2071
2072                         if (fgets(buf, 256, acpi_bat_fp[idx]) == NULL) {
2073                                 break;
2074                         }
2075
2076                         if (buf[0] == 'r') {
2077                                 sscanf(buf, "remaining capacity: %d", &remaining_capacity);
2078                         }
2079                 }
2080         }
2081         if (remaining_capacity < 0) {
2082                 return 0;
2083         }
2084         /* compute the battery percentage */
2085         last_battery_perct[idx] =
2086                 (int) (((float) remaining_capacity / acpi_design_capacity[idx]) * 100);
2087         if (last_battery_perct[idx] > 100) last_battery_perct[idx] = 100;
2088         return last_battery_perct[idx];
2089 }
2090
2091 int get_battery_perct_bar(const char *bar)
2092 {
2093         int idx;
2094
2095         get_battery_perct(bar);
2096         idx = get_battery_idx(bar);
2097         return (int) (last_battery_perct[idx] * 2.56 - 1);
2098 }
2099
2100 /* On Apple powerbook and ibook:
2101 $ cat /proc/pmu/battery_0
2102 flags      : 00000013
2103 charge     : 3623
2104 max_charge : 3720
2105 current    : 388
2106 voltage    : 16787
2107 time rem.  : 900
2108 $ cat /proc/pmu/info
2109 PMU driver version     : 2
2110 PMU firmware version   : 0c
2111 AC Power               : 1
2112 Battery count          : 1
2113 */
2114
2115 /* defines as in <linux/pmu.h> */
2116 #define PMU_BATT_PRESENT                0x00000001
2117 #define PMU_BATT_CHARGING               0x00000002
2118
2119 static FILE *pmu_battery_fp;
2120 static FILE *pmu_info_fp;
2121 static char pb_battery_info[3][32];
2122 static double pb_battery_info_update;
2123
2124 #define PMU_PATH "/proc/pmu"
2125 void get_powerbook_batt_info(char *buffer, size_t n, int i)
2126 {
2127         static int rep = 0;
2128         const char *batt_path = PMU_PATH "/battery_0";
2129         const char *info_path = PMU_PATH "/info";
2130         unsigned int flags;
2131         int charge, max_charge, ac = -1;
2132         long timeval = -1;
2133
2134         /* don't update battery too often */
2135         if (current_update_time - pb_battery_info_update < 29.5) {
2136                 snprintf(buffer, n, "%s", pb_battery_info[i]);
2137                 return;
2138         }
2139         pb_battery_info_update = current_update_time;
2140
2141         if (pmu_battery_fp == NULL) {
2142                 pmu_battery_fp = open_file(batt_path, &rep);
2143                 if (pmu_battery_fp == NULL) {
2144                         return;
2145                 }
2146         }
2147
2148         if (pmu_battery_fp != NULL) {
2149                 rewind(pmu_battery_fp);
2150                 while (!feof(pmu_battery_fp)) {
2151                         char buf[32];
2152
2153                         if (fgets(buf, sizeof(buf), pmu_battery_fp) == NULL) {
2154                                 break;
2155                         }
2156
2157                         if (buf[0] == 'f') {
2158                                 sscanf(buf, "flags      : %8x", &flags);
2159                         } else if (buf[0] == 'c' && buf[1] == 'h') {
2160                                 sscanf(buf, "charge     : %d", &charge);
2161                         } else if (buf[0] == 'm') {
2162                                 sscanf(buf, "max_charge : %d", &max_charge);
2163                         } else if (buf[0] == 't') {
2164                                 sscanf(buf, "time rem.  : %ld", &timeval);
2165                         }
2166                 }
2167         }
2168         if (pmu_info_fp == NULL) {
2169                 pmu_info_fp = open_file(info_path, &rep);
2170                 if (pmu_info_fp == NULL) {
2171                         return;
2172                 }
2173         }
2174
2175         if (pmu_info_fp != NULL) {
2176                 rewind(pmu_info_fp);
2177                 while (!feof(pmu_info_fp)) {
2178                         char buf[32];
2179
2180                         if (fgets(buf, sizeof(buf), pmu_info_fp) == NULL) {
2181                                 break;
2182                         }
2183                         if (buf[0] == 'A') {
2184                                 sscanf(buf, "AC Power               : %d", &ac);
2185                         }
2186                 }
2187         }
2188         /* update status string */
2189         if ((ac && !(flags & PMU_BATT_PRESENT))) {
2190                 strncpy(pb_battery_info[PB_BATT_STATUS], "AC", sizeof(pb_battery_info[PB_BATT_STATUS]));
2191         } else if (ac && (flags & PMU_BATT_PRESENT)
2192                         && !(flags & PMU_BATT_CHARGING)) {
2193                 strncpy(pb_battery_info[PB_BATT_STATUS], "charged", sizeof(pb_battery_info[PB_BATT_STATUS]));
2194         } else if ((flags & PMU_BATT_PRESENT) && (flags & PMU_BATT_CHARGING)) {
2195                 strncpy(pb_battery_info[PB_BATT_STATUS], "charging", sizeof(pb_battery_info[PB_BATT_STATUS]));
2196         } else {
2197                 strncpy(pb_battery_info[PB_BATT_STATUS], "discharging", sizeof(pb_battery_info[PB_BATT_STATUS]));
2198         }
2199
2200         /* update percentage string */
2201         if (timeval == 0 && ac && (flags & PMU_BATT_PRESENT)
2202                         && !(flags & PMU_BATT_CHARGING)) {
2203                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2204                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "100%%");
2205         } else if (timeval == 0) {
2206                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2207                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "unknown");
2208         } else {
2209                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2210                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "%d%%",
2211                         (charge * 100) / max_charge);
2212         }
2213
2214         /* update time string */
2215         if (timeval == 0) {                     /* fully charged or battery not present */
2216                 snprintf(pb_battery_info[PB_BATT_TIME],
2217                         sizeof(pb_battery_info[PB_BATT_TIME]), "unknown");
2218         } else if (timeval < 60 * 60) { /* don't show secs */
2219                 format_seconds_short(pb_battery_info[PB_BATT_TIME],
2220                         sizeof(pb_battery_info[PB_BATT_TIME]), timeval);
2221         } else {
2222                 format_seconds(pb_battery_info[PB_BATT_TIME],
2223                         sizeof(pb_battery_info[PB_BATT_TIME]), timeval);
2224         }
2225
2226         snprintf(buffer, n, "%s", pb_battery_info[i]);
2227 }
2228
2229 void update_top(void)
2230 {
2231         process_find_top(info.cpu, info.memu, info.time
2232 #ifdef IOSTATS
2233                 , info.io
2234 #endif
2235                 );
2236         info.first_process = get_first_process();
2237 }
2238
2239 void update_entropy(void)
2240 {
2241         static int rep = 0;
2242         const char *entropy_avail = "/proc/sys/kernel/random/entropy_avail";
2243         const char *entropy_poolsize = "/proc/sys/kernel/random/poolsize";
2244         FILE *fp1, *fp2;
2245
2246         info.entropy.entropy_avail = 0;
2247         info.entropy.poolsize = 0;
2248
2249         if ((fp1 = open_file(entropy_avail, &rep)) == NULL) {
2250                 return;
2251         }
2252
2253         if ((fp2 = open_file(entropy_poolsize, &rep)) == NULL) {
2254                 fclose(fp1);
2255                 return;
2256         }
2257
2258         fscanf(fp1, "%u", &info.entropy.entropy_avail);
2259         fscanf(fp2, "%u", &info.entropy.poolsize);
2260
2261         fclose(fp1);
2262         fclose(fp2);
2263 }
2264
2265 const char *get_disk_protect_queue(const char *disk)
2266 {
2267         FILE *fp;
2268         char path[128];
2269         int state;
2270
2271         snprintf(path, 127, "/sys/block/%s/device/unload_heads", disk);
2272         if (access(path, F_OK)) {
2273                 snprintf(path, 127, "/sys/block/%s/queue/protect", disk);
2274         }
2275         if ((fp = fopen(path, "r")) == NULL)
2276                 return "n/a   ";
2277         if (fscanf(fp, "%d\n", &state) != 1) {
2278                 fclose(fp);
2279                 return "failed";
2280         }
2281         fclose(fp);
2282         return (state > 0) ? "frozen" : "free  ";
2283 }
2284
2285 void update_diskio(void)
2286 {
2287         FILE *fp;
2288         static int rep = 0;
2289         char buf[512], devbuf[64];
2290         unsigned int major, minor;
2291         int col_count = 0;
2292         struct diskio_stat *cur;
2293         unsigned int reads, writes;
2294         unsigned int total_reads = 0, total_writes = 0;
2295
2296         stats.current = 0;
2297         stats.current_read = 0;
2298         stats.current_write = 0;
2299
2300         if (!(fp = open_file("/proc/diskstats", &rep))) {
2301                 return;
2302         }
2303
2304         /* read reads and writes from all disks (minor = 0), including cd-roms
2305          * and floppies, and sum them up */
2306         while (fgets(buf, 512, fp)) {
2307                 col_count = sscanf(buf, "%u %u %s %*u %*u %u %*u %*u %*u %u", &major,
2308                         &minor, devbuf, &reads, &writes);
2309                 /* ignore subdevices (they have only 3 matching entries in their line)
2310                  * and virtual devices (LVM, network block devices, RAM disks, Loopback)
2311                  *
2312                  * XXX: ignore devices which are part of a SW RAID (MD_MAJOR) */
2313                 if (col_count == 5 && major != LVM_BLK_MAJOR && major != NBD_MAJOR
2314                                 && major != RAMDISK_MAJOR && major != LOOP_MAJOR) {
2315                         total_reads += reads;
2316                         total_writes += writes;
2317                 } else {
2318                         col_count = sscanf(buf, "%u %u %s %*u %u %*u %u",
2319                                 &major, &minor, devbuf, &reads, &writes);
2320                         if (col_count != 5) {
2321                                 continue;
2322                         }
2323                 }
2324                 cur = stats.next;
2325                 while (cur && strcmp(devbuf, cur->dev))
2326                         cur = cur->next;
2327
2328                 if (cur)
2329                         update_diskio_values(cur, reads, writes);
2330         }
2331         update_diskio_values(&stats, total_reads, total_writes);
2332         fclose(fp);
2333 }