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

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