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

   1 /* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
   2  * vim: ts=4 sw=4 noet ai cindent syntax=c
   3  *
   4  * Conky, a system monitor, based on torsmo
   5  *
   6  * Any original torsmo code is licensed under the BSD license
   7  *
   8  * All code written since the fork of torsmo is licensed under the GPL
   9  *
  10  * Please see COPYING for details
  11  *
  12  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
  13  * Copyright (c) 2007 Toni Spets
  14  * Copyright (c) 2005-2010 Brenden Matthews, Philip Kovacs, et. al.
  15  *      (see AUTHORS)
  16  * All rights reserved.
  17  *
  18  * This program is free software: you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation, either version 3 of the License, or
  21  * (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  29  *
  30  */
  31
  32 #include "conky.h"
  33 #include "logging.h"
  34 #include "common.h"
  35 #include "linux.h"
  36 #include "net_stat.h"
  37 #include "diskio.h"
  38 #include "temphelper.h"
  39 #include <dirent.h>
  40 #include <ctype.h>
  41 #include <errno.h>
  42 #include <limits.h>
  43 #include <sys/types.h>
  44 #include <sys/sysinfo.h>
  45 #include <sys/stat.h>
  46 #ifndef HAVE_CLOCK_GETTIME
  47 #include <sys/time.h>
  48 #endif
  49 #include <fcntl.h>
  50 #include <unistd.h>
  51 // #include <assert.h>
  52 #include <time.h>
  53 #include "top.h"
  54
  55 #include <sys/ioctl.h>
  56 #include <sys/socket.h>
  57 #include <netinet/in.h>
  58 #include <linux/sockios.h>
  59 #include <net/if.h>
  60 #include <arpa/inet.h>
  61 #ifdef _NET_IF_H
  62 #define _LINUX_IF_H
  63 #endif
  64 #include <linux/route.h>
  65 #include <math.h>
  66 #include <pthread.h>
  67
  68 /* The following ifdefs were adapted from gkrellm */
  69 #include <linux/major.h>
  70
  71 #if !defined(MD_MAJOR)
  72 #define MD_MAJOR 9
  73 #endif
  74
  75 #if !defined(LVM_BLK_MAJOR)
  76 #define LVM_BLK_MAJOR 58
  77 #endif
  78
  79 #if !defined(NBD_MAJOR)
  80 #define NBD_MAJOR 43
  81 #endif
  82
  83 #ifdef HAVE_IWLIB
  84 #include <iwlib.h>
  85 #endif
  86
  87 struct sysfs {
  88         int fd;
  89         int arg;
  90         char devtype[256];
  91         char type[64];
  92         float factor, offset;
  93 };
  94
  95 #define SHORTSTAT_TEMPL "%*s %llu %llu %llu"
  96 #define LONGSTAT_TEMPL "%*s %llu %llu %llu "
  97
  98 /* This flag tells the linux routines to use the /proc system where possible,
  99  * even if other api's are available, e.g. sysinfo() or getloadavg().
 100  * the reason for this is to allow for /proc-based distributed monitoring.
 101  * using a flag in this manner creates less confusing code. */
 102 static int prefer_proc = 0;
 103
 104 void prepare_update(void)
 105 {
 106 }
 107
 108 void update_uptime(void)
 109 {
 110 #ifdef HAVE_SYSINFO
 111         if (!prefer_proc) {
 112                 struct sysinfo s_info;
 113
 114                 sysinfo(&s_info);
 115                 info.uptime = (double) s_info.uptime;
 116         } else
 117 #endif
 118         {
 119                 static int rep = 0;
 120                 FILE *fp;
 121
 122                 if (!(fp = open_file("/proc/uptime", &rep))) {
 123                         info.uptime = 0.0;
 124                         return;
 125                 }
 126                 fscanf(fp, "%lf", &info.uptime);
 127                 fclose(fp);
 128         }
 129 }
 130
 131 int check_mount(char *s)
 132 {
 133         int ret = 0;
 134         FILE *mtab = fopen("/etc/mtab", "r");
 135
 136         if (mtab) {
 137                 char buf1[256], buf2[128];
 138
 139                 while (fgets(buf1, 256, mtab)) {
 140                         sscanf(buf1, "%*s %128s", buf2);
 141                         if (!strcmp(s, buf2)) {
 142                                 ret = 1;
 143                                 break;
 144                         }
 145                 }
 146                 fclose(mtab);
 147         } else {
 148                 NORM_ERR("Could not open mtab");
 149         }
 150         return ret;
 151 }
 152
 153 /* these things are also in sysinfo except Buffers:
 154  * (that's why I'm reading them from proc) */
 155
 156 void update_meminfo(void)
 157 {
 158         FILE *meminfo_fp;
 159         static int rep = 0;
 160
 161         /* unsigned int a; */
 162         char buf[256];
 163
 164         info.mem = info.memmax = info.swap = info.swapfree = info.swapmax = info.bufmem =
 165                 info.buffers = info.cached = info.memfree = info.memeasyfree = 0;
 166
 167         if (!(meminfo_fp = open_file("/proc/meminfo", &rep))) {
 168                 return;
 169         }
 170
 171         while (!feof(meminfo_fp)) {
 172                 if (fgets(buf, 255, meminfo_fp) == NULL) {
 173                         break;
 174                 }
 175
 176                 if (strncmp(buf, "MemTotal:", 9) == 0) {
 177                         sscanf(buf, "%*s %llu", &info.memmax);
 178                 } else if (strncmp(buf, "MemFree:", 8) == 0) {
 179                         sscanf(buf, "%*s %llu", &info.memfree);
 180                 } else if (strncmp(buf, "SwapTotal:", 10) == 0) {
 181                         sscanf(buf, "%*s %llu", &info.swapmax);
 182                 } else if (strncmp(buf, "SwapFree:", 9) == 0) {
 183                         sscanf(buf, "%*s %llu", &info.swapfree);
 184                 } else if (strncmp(buf, "Buffers:", 8) == 0) {
 185                         sscanf(buf, "%*s %llu", &info.buffers);
 186                 } else if (strncmp(buf, "Cached:", 7) == 0) {
 187                         sscanf(buf, "%*s %llu", &info.cached);
 188                 }
 189         }
 190
 191         info.mem = info.memmax - info.memfree;
 192         info.memeasyfree = info.memfree;
 193         info.swap = info.swapmax - info.swapfree;
 194
 195         info.bufmem = info.cached + info.buffers;
 196
 197         fclose(meminfo_fp);
 198 }
 199
 200 int get_laptop_mode(void)
 201 {
 202         FILE *fp;
 203         int val = -1;
 204
 205         if ((fp = fopen("/proc/sys/vm/laptop_mode", "r")) != NULL)
 206                 fscanf(fp, "%d\n", &val);
 207         fclose(fp);
 208         return val;
 209 }
 210
 211 /* my system says:
 212  * # cat /sys/block/sda/queue/scheduler
 213  * noop [anticipatory] cfq
 214  */
 215 char *get_ioscheduler(char *disk)
 216 {
 217         FILE *fp;
 218         char buf[128];
 219
 220         if (!disk)
 221                 return strndup("n/a", text_buffer_size);
 222
 223         snprintf(buf, 127, "/sys/block/%s/queue/scheduler", disk);
 224         if ((fp = fopen(buf, "r")) == NULL) {
 225                 return strndup("n/a", text_buffer_size);
 226         }
 227         while (!feof(fp)) {
 228                 fscanf(fp, "%127s", buf);
 229                 if (buf[0] == '[') {
 230                         buf[strlen(buf) - 1] = '\0';
 231                         fclose(fp);
 232                         return strndup(buf + 1, text_buffer_size);
 233                 }
 234         }
 235         fclose(fp);
 236         return strndup("n/a", text_buffer_size);
 237 }
 238
 239 static struct {
 240         char *iface;
 241         char *ip;
 242         int count;
 243 } gw_info;
 244
 245 #define COND_FREE(x) if(x) free(x); x = 0
 246 #define SAVE_SET_STRING(x, y) \
 247         if (x && strcmp((char *)x, (char *)y)) { \
 248                 free(x); \
 249                 x = strndup("multiple", text_buffer_size); \
 250         } else if (!x) { \
 251                 x = strndup(y, text_buffer_size); \
 252         }
 253
 254 void update_gateway_info_failure(const char *reason)
 255 {
 256         if(reason != NULL) {
 257                 perror(reason);
 258         }
 259         //2 pointers to 1 location causes a crash when we try to free them both
 260         gw_info.iface = strndup("failed", text_buffer_size);
 261         gw_info.ip = strndup("failed", text_buffer_size);
 262 }
 263
 264
 265 /* Iface Destination Gateway Flags RefCnt Use Metric Mask MTU Window IRTT */
 266 #define RT_ENTRY_FORMAT "%63s %lx %lx %x %*d %*d %*d %lx %*d %*d %*d\n"
 267
 268 void update_gateway_info(void)
 269 {
 270         FILE *fp;
 271         struct in_addr ina;
 272         char iface[64];
 273         unsigned long dest, gate, mask;
 274         unsigned int flags;
 275
 276         COND_FREE(gw_info.iface);
 277         COND_FREE(gw_info.ip);
 278         gw_info.count = 0;
 279
 280         if ((fp = fopen("/proc/net/route", "r")) == NULL) {
 281                 update_gateway_info_failure("fopen()");
 282                 return;
 283         }
 284
 285         /* skip over the table header line, which is always present */
 286         fscanf(fp, "%*[^\n]\n");
 287
 288         while (!feof(fp)) {
 289                 if(fscanf(fp, RT_ENTRY_FORMAT,
 290                           iface, &dest, &gate, &flags, &mask) != 5) {
 291                         update_gateway_info_failure("fscanf()");
 292                         break;
 293                 }
 294                 if (!(dest || mask) && ((flags & RTF_GATEWAY) || !gate) ) {
 295                         gw_info.count++;
 296                         SAVE_SET_STRING(gw_info.iface, iface)
 297                         ina.s_addr = gate;
 298                         SAVE_SET_STRING(gw_info.ip, inet_ntoa(ina))
 299                 }
 300         }
 301         fclose(fp);
 302         return;
 303 }
 304
 305 void free_gateway_info(void)
 306 {
 307         if (gw_info.iface)
 308                 free(gw_info.iface);
 309         if (gw_info.ip)
 310                 free(gw_info.ip);
 311         memset(&gw_info, 0, sizeof(gw_info));
 312 }
 313
 314 int gateway_exists(void)
 315 {
 316         return !!gw_info.count;
 317 }
 318
 319 void print_gateway_iface(char *p, int p_max_size)
 320 {
 321         snprintf(p, p_max_size, "%s", gw_info.iface);
 322 }
 323
 324 void print_gateway_ip(char *p, int p_max_size)
 325 {
 326         snprintf(p, p_max_size, "%s", gw_info.ip);
 327 }
 328
 329 void update_net_stats(void)
 330 {
 331         FILE *net_dev_fp;
 332         static int rep = 0;
 333         static char first = 1;
 334
 335         // FIXME: arbitrary size chosen to keep code simple.
 336         int i, i2;
 337         unsigned int curtmp1, curtmp2;
 338         unsigned int k;
 339         struct ifconf conf;
 340         char buf[256];
 341         double delta;
 342
 343 #ifdef HAVE_IWLIB
 344         // wireless info variables
 345         int skfd, has_bitrate = 0;
 346         struct wireless_info *winfo;
 347         struct iwreq wrq;
 348 #endif
 349
 350         /* get delta */
 351         delta = current_update_time - last_update_time;
 352         if (delta <= 0.0001) {
 353                 return;
 354         }
 355
 356         /* open file and ignore first two lines */
 357         if (!(net_dev_fp = open_file("/proc/net/dev", &rep))) {
 358                 clear_net_stats();
 359                 return;
 360         }
 361
 362         fgets(buf, 255, net_dev_fp);    /* garbage */
 363         fgets(buf, 255, net_dev_fp);    /* garbage (field names) */
 364
 365         /* read each interface */
 366         for (i2 = 0; i2 < MAX_NET_INTERFACES; i2++) {
 367                 struct net_stat *ns;
 368                 char *s, *p;
 369                 char temp_addr[18];
 370                 long long r, t, last_recv, last_trans;
 371
 372                 if (fgets(buf, 255, net_dev_fp) == NULL) {
 373                         break;
 374                 }
 375                 p = buf;
 376                 while (isspace((int) *p)) {
 377                         p++;
 378                 }
 379
 380                 s = p;
 381
 382                 while (*p && *p != ':') {
 383                         p++;
 384                 }
 385                 if (*p == '\0') {
 386                         continue;
 387                 }
 388                 *p = '\0';
 389                 p++;
 390
 391                 ns = get_net_stat(s, NULL, NULL);
 392                 ns->up = 1;
 393                 memset(&(ns->addr.sa_data), 0, 14);
 394
 395                 memset(ns->addrs, 0, 17 * MAX_NET_INTERFACES + 1); /* Up to 17 chars per ip, max MAX_NET_INTERFACES interfaces. Nasty memory usage... */
 396
 397                 last_recv = ns->recv;
 398                 last_trans = ns->trans;
 399
 400                 /* bytes packets errs drop fifo frame compressed multicast|bytes ... */
 401                 sscanf(p, "%lld  %*d     %*d  %*d  %*d  %*d   %*d        %*d       %lld",
 402                         &r, &t);
 403
 404                 /* if recv or trans is less than last time, an overflow happened */
 405                 if (r < ns->last_read_recv) {
 406                         last_recv = 0;
 407                 } else {
 408                         ns->recv += (r - ns->last_read_recv);
 409                 }
 410                 ns->last_read_recv = r;
 411
 412                 if (t < ns->last_read_trans) {
 413                         last_trans = 0;
 414                 } else {
 415                         ns->trans += (t - ns->last_read_trans);
 416                 }
 417                 ns->last_read_trans = t;
 418
 419                 /*** ip addr patch ***/
 420                 i = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
 421
 422                 conf.ifc_buf = malloc(sizeof(struct ifreq) * MAX_NET_INTERFACES);
 423                 conf.ifc_len = sizeof(struct ifreq) * MAX_NET_INTERFACES;
 424                 memset(conf.ifc_buf, 0, conf.ifc_len);
 425
 426                 ioctl((long) i, SIOCGIFCONF, &conf);
 427
 428                 for (k = 0; k < conf.ifc_len / sizeof(struct ifreq); k++) {
 429                         struct net_stat *ns2;
 430
 431                         if (!(((struct ifreq *) conf.ifc_buf) + k))
 432                                 break;
 433
 434                         ns2 = get_net_stat(
 435                                         ((struct ifreq *) conf.ifc_buf)[k].ifr_ifrn.ifrn_name, NULL, NULL);
 436                         ns2->addr = ((struct ifreq *) conf.ifc_buf)[k].ifr_ifru.ifru_addr;
 437                         sprintf(temp_addr, "%u.%u.%u.%u, ",
 438                                         ns2->addr.sa_data[2] & 255,
 439                                         ns2->addr.sa_data[3] & 255,
 440                                         ns2->addr.sa_data[4] & 255,
 441                                         ns2->addr.sa_data[5] & 255);
 442                         if(NULL == strstr(ns2->addrs, temp_addr))
 443                                 strncpy(ns2->addrs + strlen(ns2->addrs), temp_addr, 17);
 444                 }
 445
 446                 close((long) i);
 447
 448                 free(conf.ifc_buf);
 449
 450                 /*** end ip addr patch ***/
 451
 452                 if (!first) {
 453                         /* calculate speeds */
 454                         ns->net_rec[0] = (ns->recv - last_recv) / delta;
 455                         ns->net_trans[0] = (ns->trans - last_trans) / delta;
 456                 }
 457
 458                 curtmp1 = 0;
 459                 curtmp2 = 0;
 460                 // get an average
 461 #ifdef HAVE_OPENMP
 462 #pragma omp parallel for reduction(+:curtmp1, curtmp2) schedule(dynamic,10)
 463 #endif /* HAVE_OPENMP */
 464                 for (i = 0; i < info.net_avg_samples; i++) {
 465                         curtmp1 = curtmp1 + ns->net_rec[i];
 466                         curtmp2 = curtmp2 + ns->net_trans[i];
 467                 }
 468                 ns->recv_speed = curtmp1 / (double) info.net_avg_samples;
 469                 ns->trans_speed = curtmp2 / (double) info.net_avg_samples;
 470                 if (info.net_avg_samples > 1) {
 471 #ifdef HAVE_OPENMP
 472 #pragma omp parallel for schedule(dynamic,10)
 473 #endif /* HAVE_OPENMP */
 474                         for (i = info.net_avg_samples; i > 1; i--) {
 475                                 ns->net_rec[i - 1] = ns->net_rec[i - 2];
 476                                 ns->net_trans[i - 1] = ns->net_trans[i - 2];
 477                         }
 478                 }
 479
 480 #ifdef HAVE_IWLIB
 481                 /* update wireless info */
 482                 winfo = malloc(sizeof(struct wireless_info));
 483                 memset(winfo, 0, sizeof(struct wireless_info));
 484
 485                 skfd = iw_sockets_open();
 486                 if (iw_get_basic_config(skfd, s, &(winfo->b)) > -1) {
 487
 488                         // set present winfo variables
 489                         if (iw_get_stats(skfd, s, &(winfo->stats),
 490                                         &winfo->range, winfo->has_range) >= 0) {
 491                                 winfo->has_stats = 1;
 492                         }
 493                         if (iw_get_range_info(skfd, s, &(winfo->range)) >= 0) {
 494                                 winfo->has_range = 1;
 495                         }
 496                         if (iw_get_ext(skfd, s, SIOCGIWAP, &wrq) >= 0) {
 497                                 winfo->has_ap_addr = 1;
 498                                 memcpy(&(winfo->ap_addr), &(wrq.u.ap_addr), sizeof(sockaddr));
 499                         }
 500
 501                         // get bitrate
 502                         if (iw_get_ext(skfd, s, SIOCGIWRATE, &wrq) >= 0) {
 503                                 memcpy(&(winfo->bitrate), &(wrq.u.bitrate), sizeof(iwparam));
 504                                 iw_print_bitrate(ns->bitrate, 16, winfo->bitrate.value);
 505                                 has_bitrate = 1;
 506                         }
 507
 508                         // get link quality
 509                         if (winfo->has_range && winfo->has_stats
 510                                         && ((winfo->stats.qual.level != 0)
 511                                         || (winfo->stats.qual.updated & IW_QUAL_DBM))) {
 512                                 if (!(winfo->stats.qual.updated & IW_QUAL_QUAL_INVALID)) {
 513                                         ns->link_qual = winfo->stats.qual.qual;
 514                                         ns->link_qual_max = winfo->range.max_qual.qual;
 515                                 }
 516                         }
 517
 518                         // get ap mac
 519                         if (winfo->has_ap_addr) {
 520                                 iw_sawap_ntop(&winfo->ap_addr, ns->ap);
 521                         }
 522
 523                         // get essid
 524                         if (winfo->b.has_essid) {
 525                                 if (winfo->b.essid_on) {
 526                                         snprintf(ns->essid, 32, "%s", winfo->b.essid);
 527                                 } else {
 528                                         snprintf(ns->essid, 32, "off/any");
 529                                 }
 530                         }
 531
 532                         snprintf(ns->mode, 16, "%s", iw_operation_mode[winfo->b.mode]);
 533                 }
 534                 iw_sockets_close(skfd);
 535                 free(winfo);
 536 #endif
 537         }
 538         first = 0;
 539
 540         fclose(net_dev_fp);
 541 }
 542
 543 int result;
 544
 545 void update_total_processes(void)
 546 {
 547         DIR *dir;
 548         struct dirent *entry;
 549         int ignore1;
 550         char ignore2;
 551
 552         info.procs = 0;
 553         if (!(dir = opendir("/proc"))) {
 554                 return;
 555         }
 556         while ((entry = readdir(dir))) {
 557                 if (!entry) {
 558                         /* Problem reading list of processes */
 559                         closedir(dir);
 560                         info.procs = 0;
 561                         return;
 562                 }
 563                 if (sscanf(entry->d_name, "%d%c", &ignore1, &ignore2) == 1) {
 564                         info.procs++;
 565                 }
 566         }
 567         closedir(dir);
 568 }
 569
 570 void update_threads(void)
 571 {
 572 #ifdef HAVE_SYSINFO
 573         if (!prefer_proc) {
 574                 struct sysinfo s_info;
 575
 576                 sysinfo(&s_info);
 577                 info.threads = s_info.procs;
 578         } else
 579 #endif
 580         {
 581                 static int rep = 0;
 582                 FILE *fp;
 583
 584                 if (!(fp = open_file("/proc/loadavg", &rep))) {
 585                         info.threads = 0;
 586                         return;
 587                 }
 588                 fscanf(fp, "%*f %*f %*f %*d/%hu", &info.threads);
 589                 fclose(fp);
 590         }
 591 }
 592
 593 #define CPU_SAMPLE_COUNT 15
 594 struct cpu_info {
 595         unsigned long long cpu_user;
 596         unsigned long long cpu_system;
 597         unsigned long long cpu_nice;
 598         unsigned long long cpu_idle;
 599         unsigned long long cpu_iowait;
 600         unsigned long long cpu_irq;
 601         unsigned long long cpu_softirq;
 602         unsigned long long cpu_steal;
 603         unsigned long long cpu_total;
 604         unsigned long long cpu_active_total;
 605         unsigned long long cpu_last_total;
 606         unsigned long long cpu_last_active_total;
 607         double cpu_val[CPU_SAMPLE_COUNT];
 608 };
 609 static short cpu_setup = 0;
 610
 611 /* Determine if this kernel gives us "extended" statistics information in
 612  * /proc/stat.
 613  * Kernels around 2.5 and earlier only reported user, system, nice, and
 614  * idle values in proc stat.
 615  * Kernels around 2.6 and greater report these PLUS iowait, irq, softirq,
 616  * and steal */
 617 void determine_longstat(char *buf)
 618 {
 619         unsigned long long iowait = 0;
 620
 621         KFLAG_SETOFF(KFLAG_IS_LONGSTAT);
 622         /* scanf will either return -1 or 1 because there is only 1 assignment */
 623         if (sscanf(buf, "%*s %*d %*d %*d %*d %llu", &iowait) > 0) {
 624                 KFLAG_SETON(KFLAG_IS_LONGSTAT);
 625         }
 626 }
 627
 628 void get_cpu_count(void)
 629 {
 630         FILE *stat_fp;
 631         static int rep = 0;
 632         char buf[256];
 633
 634         if (info.cpu_usage) {
 635                 return;
 636         }
 637
 638         if (!(stat_fp = open_file("/proc/stat", &rep))) {
 639                 return;
 640         }
 641
 642         info.cpu_count = 0;
 643
 644         while (!feof(stat_fp)) {
 645                 if (fgets(buf, 255, stat_fp) == NULL) {
 646                         break;
 647                 }
 648
 649                 if (strncmp(buf, "cpu", 3) == 0 && isdigit(buf[3])) {
 650                         if (info.cpu_count == 0) {
 651                                 determine_longstat(buf);
 652                         }
 653                         info.cpu_count++;
 654                 }
 655         }
 656         info.cpu_usage = malloc((info.cpu_count + 1) * sizeof(float));
 657
 658         fclose(stat_fp);
 659 }
 660
 661 #define TMPL_LONGSTAT "%*s %llu %llu %llu %llu %llu %llu %llu %llu"
 662 #define TMPL_SHORTSTAT "%*s %llu %llu %llu %llu"
 663
 664 void update_stat(void)
 665 {
 666         FILE *stat_fp;
 667         static int rep = 0;
 668         static struct cpu_info *cpu = NULL;
 669         char buf[256];
 670         int i;
 671         unsigned int idx;
 672         double curtmp;
 673         const char *stat_template = NULL;
 674         unsigned int malloc_cpu_size = 0;
 675         extern void* global_cpu;
 676
 677         static pthread_mutex_t last_stat_update_mutex = PTHREAD_MUTEX_INITIALIZER;
 678         static double last_stat_update = 0.0;
 679
 680         /* since we use wrappers for this function, the update machinery
 681          * can't eliminate double invocations of this function. Check for
 682          * them here, otherwise cpu_usage counters are freaking out. */
 683         pthread_mutex_lock(&last_stat_update_mutex);
 684         if (last_stat_update == current_update_time) {
 685                 pthread_mutex_unlock(&last_stat_update_mutex);
 686                 return;
 687         }
 688         last_stat_update = current_update_time;
 689         pthread_mutex_unlock(&last_stat_update_mutex);
 690
 691         /* add check for !info.cpu_usage since that mem is freed on a SIGUSR1 */
 692         if (!cpu_setup || !info.cpu_usage) {
 693                 get_cpu_count();
 694                 cpu_setup = 1;
 695         }
 696
 697         if (!stat_template) {
 698                 stat_template =
 699                         KFLAG_ISSET(KFLAG_IS_LONGSTAT) ? TMPL_LONGSTAT : TMPL_SHORTSTAT;
 700         }
 701
 702         if (!global_cpu) {
 703                 malloc_cpu_size = (info.cpu_count + 1) * sizeof(struct cpu_info);
 704                 cpu = malloc(malloc_cpu_size);
 705                 memset(cpu, 0, malloc_cpu_size);
 706                 global_cpu = cpu;
 707         }
 708
 709         if (!(stat_fp = open_file("/proc/stat", &rep))) {
 710                 info.run_threads = 0;
 711                 if (info.cpu_usage) {
 712                         memset(info.cpu_usage, 0, info.cpu_count * sizeof(float));
 713                 }
 714                 return;
 715         }
 716
 717         idx = 0;
 718         while (!feof(stat_fp)) {
 719                 if (fgets(buf, 255, stat_fp) == NULL) {
 720                         break;
 721                 }
 722
 723                 if (strncmp(buf, "procs_running ", 14) == 0) {
 724                         sscanf(buf, "%*s %hu", &info.run_threads);
 725                 } else if (strncmp(buf, "cpu", 3) == 0) {
 726                         double delta;
 727                         if (isdigit(buf[3])) {
 728                                 idx = atoi(&buf[3]) + 1;
 729                         } else {
 730                                 idx = 0;
 731                         }
 732                         sscanf(buf, stat_template, &(cpu[idx].cpu_user),
 733                                 &(cpu[idx].cpu_nice), &(cpu[idx].cpu_system),
 734                                 &(cpu[idx].cpu_idle), &(cpu[idx].cpu_iowait),
 735                                 &(cpu[idx].cpu_irq), &(cpu[idx].cpu_softirq),
 736                                 &(cpu[idx].cpu_steal));
 737
 738                         cpu[idx].cpu_total = cpu[idx].cpu_user + cpu[idx].cpu_nice +
 739                                 cpu[idx].cpu_system + cpu[idx].cpu_idle +
 740                                 cpu[idx].cpu_iowait + cpu[idx].cpu_irq +
 741                                 cpu[idx].cpu_softirq + cpu[idx].cpu_steal;
 742
 743                         cpu[idx].cpu_active_total = cpu[idx].cpu_total -
 744                                 (cpu[idx].cpu_idle + cpu[idx].cpu_iowait);
 745
 746                         delta = current_update_time - last_update_time;
 747
 748                         if (delta <= 0.001) {
 749                                 break;
 750                         }
 751
 752                         cpu[idx].cpu_val[0] = (cpu[idx].cpu_active_total -
 753                                 cpu[idx].cpu_last_active_total) /
 754                                 (float) (cpu[idx].cpu_total - cpu[idx].cpu_last_total);
 755                         curtmp = 0;
 756 #ifdef HAVE_OPENMP
 757 #pragma omp parallel for reduction(+:curtmp) schedule(dynamic,10)
 758 #endif /* HAVE_OPENMP */
 759                         for (i = 0; i < info.cpu_avg_samples; i++) {
 760                                 curtmp = curtmp + cpu[idx].cpu_val[i];
 761                         }
 762                         /* TESTING -- I've removed this, because I don't think it is right.
 763                          * You shouldn't divide by the cpu count here ...
 764                          * removing for testing */
 765                         /* if (idx == 0) {
 766                                 info.cpu_usage[idx] = curtmp / info.cpu_avg_samples /
 767                                         info.cpu_count;
 768                         } else {
 769                                 info.cpu_usage[idx] = curtmp / info.cpu_avg_samples;
 770                         } */
 771                         /* TESTING -- this line replaces the prev. "suspect" if/else */
 772                         info.cpu_usage[idx] = curtmp / info.cpu_avg_samples;
 773
 774                         cpu[idx].cpu_last_total = cpu[idx].cpu_total;
 775                         cpu[idx].cpu_last_active_total = cpu[idx].cpu_active_total;
 776 #ifdef HAVE_OPENMP
 777 #pragma omp parallel for schedule(dynamic,10)
 778 #endif /* HAVE_OPENMP */
 779                         for (i = info.cpu_avg_samples - 1; i > 0; i--) {
 780                                 cpu[idx].cpu_val[i] = cpu[idx].cpu_val[i - 1];
 781                         }
 782                 }
 783         }
 784         fclose(stat_fp);
 785 }
 786
 787 void update_running_processes(void)
 788 {
 789         update_stat();
 790 }
 791
 792 void update_cpu_usage(void)
 793 {
 794         update_stat();
 795 }
 796
 797 void update_load_average(void)
 798 {
 799 #ifdef HAVE_GETLOADAVG
 800         if (!prefer_proc) {
 801                 double v[3];
 802
 803                 getloadavg(v, 3);
 804                 info.loadavg[0] = (float) v[0];
 805                 info.loadavg[1] = (float) v[1];
 806                 info.loadavg[2] = (float) v[2];
 807         } else
 808 #endif
 809         {
 810                 static int rep = 0;
 811                 FILE *fp;
 812
 813                 if (!(fp = open_file("/proc/loadavg", &rep))) {
 814                         info.loadavg[0] = info.loadavg[1] = info.loadavg[2] = 0.0;
 815                         return;
 816                 }
 817                 fscanf(fp, "%f %f %f", &info.loadavg[0], &info.loadavg[1],
 818                         &info.loadavg[2]);
 819                 fclose(fp);
 820         }
 821 }
 822
 823 /***********************************************************/
 824 /***********************************************************/
 825 /***********************************************************/
 826
 827 static int no_dots(const struct dirent *d)
 828 {
 829         if (d->d_name[0] == '.') {
 830                 return 0;
 831         }
 832         return 1;
 833 }
 834
 835 static int get_first_file_in_a_directory(const char *dir, char *s, int *rep)
 836 {
 837         struct dirent **namelist;
 838         int i, n;
 839
 840         n = scandir(dir, &namelist, no_dots, alphasort);
 841         if (n < 0) {
 842                 if (!rep || !*rep) {
 843                         NORM_ERR("scandir for %s: %s", dir, strerror(errno));
 844                         if (rep) {
 845                                 *rep = 1;
 846                         }
 847                 }
 848                 return 0;
 849         } else {
 850                 if (n == 0) {
 851                         return 0;
 852                 }
 853
 854                 strncpy(s, namelist[0]->d_name, 255);
 855                 s[255] = '\0';
 856
 857 #ifdef HAVE_OPENMP
 858 #pragma omp parallel for schedule(dynamic,10)
 859 #endif /* HAVE_OPENMP */
 860                 for (i = 0; i < n; i++) {
 861                         free(namelist[i]);
 862                 }
 863                 free(namelist);
 864
 865                 return 1;
 866         }
 867 }
 868
 869 static int open_sysfs_sensor(const char *dir, const char *dev, const char *type, int n,
 870                 int *divisor, char *devtype)
 871 {
 872         char path[256];
 873         char buf[256];
 874         int fd;
 875         int divfd;
 876
 877         memset(buf, 0, sizeof(buf));
 878
 879         /* if device is NULL or *, get first */
 880         if (dev == NULL || strcmp(dev, "*") == 0) {
 881                 static int rep = 0;
 882
 883                 if (!get_first_file_in_a_directory(dir, buf, &rep)) {
 884                         return -1;
 885                 }
 886                 dev = buf;
 887         }
 888
 889         if (strcmp(dir, "/sys/class/hwmon/") == 0) {
 890                 if (*buf) {
 891                         /* buf holds result from get_first_file_in_a_directory() above,
 892                          * e.g. "hwmon0" -- append "/device" */
 893                         strcat(buf, "/device");
 894                 } else {
 895                         /* dev holds device number N as a string,
 896                          * e.g. "0", -- convert to "hwmon0/device" */
 897                         sprintf(buf, "hwmon%s/device", dev);
 898                         dev = buf;
 899                 }
 900         }
 901
 902         /* change vol to in, tempf to temp */
 903         if (strcmp(type, "vol") == 0) {
 904                 type = "in";
 905         } else if (strcmp(type, "tempf") == 0) {
 906                 type = "temp";
 907         }
 908
 909         /* construct path */
 910         snprintf(path, 255, "%s%s/%s%d_input", dir, dev, type, n);
 911
 912         /* first, attempt to open file in /device */
 913         fd = open(path, O_RDONLY);
 914         if (fd < 0) {
 915
 916                 /* if it fails, strip the /device from dev and attempt again */
 917                 buf[strlen(buf) - 7] = 0;
 918                 snprintf(path, 255, "%s%s/%s%d_input", dir, dev, type, n);
 919                 fd = open(path, O_RDONLY);
 920                 if (fd < 0) {
 921                         CRIT_ERR(NULL, NULL, "can't open '%s': %s\nplease check your device or remove this "
 922                                          "var from "PACKAGE_NAME, path, strerror(errno));
 923                 }
 924         }
 925
 926         strncpy(devtype, path, 255);
 927
 928         if (strcmp(type, "in") == 0 || strcmp(type, "temp") == 0
 929                         || strcmp(type, "tempf") == 0) {
 930                 *divisor = 1;
 931         } else {
 932                 *divisor = 0;
 933         }
 934         /* fan does not use *_div as a read divisor */
 935         if (strcmp("fan", type) == 0) {
 936                 return fd;
 937         }
 938
 939         /* test if *_div file exist, open it and use it as divisor */
 940         if (strcmp(type, "tempf") == 0) {
 941                 snprintf(path, 255, "%s%s/%s%d_div", dir, "one", "two", n);
 942         } else {
 943                 snprintf(path, 255, "%s%s/%s%d_div", dir, dev, type, n);
 944         }
 945
 946         divfd = open(path, O_RDONLY);
 947         if (divfd > 0) {
 948                 /* read integer */
 949                 char divbuf[64];
 950                 int divn;
 951
 952                 divn = read(divfd, divbuf, 63);
 953                 /* should read until n == 0 but I doubt that kernel will give these
 954                  * in multiple pieces. :) */
 955                 if (divn < 0) {
 956                         NORM_ERR("open_sysfs_sensor(): can't read from sysfs");
 957                 } else {
 958                         divbuf[divn] = '\0';
 959                         *divisor = atoi(divbuf);
 960                 }
 961                 close(divfd);
 962         }
 963
 964         return fd;
 965 }
 966
 967 static double get_sysfs_info(int *fd, int divisor, char *devtype, char *type)
 968 {
 969         int val = 0;
 970
 971         if (*fd <= 0) {
 972                 return 0;
 973         }
 974
 975         lseek(*fd, 0, SEEK_SET);
 976
 977         /* read integer */
 978         {
 979                 char buf[64];
 980                 int n;
 981                 n = read(*fd, buf, 63);
 982                 /* should read until n == 0 but I doubt that kernel will give these
 983                  * in multiple pieces. :) */
 984                 if (n < 0) {
 985                         NORM_ERR("get_sysfs_info(): read from %s failed\n", devtype);
 986                 } else {
 987                         buf[n] = '\0';
 988                         val = atoi(buf);
 989                 }
 990         }
 991
 992         close(*fd);
 993         /* open file */
 994         *fd = open(devtype, O_RDONLY);
 995         if (*fd < 0) {
 996                 NORM_ERR("can't open '%s': %s", devtype, strerror(errno));
 997         }
 998
 999         /* My dirty hack for computing CPU value
1000          * Filedil, from forums.gentoo.org */
1001         /* if (strstr(devtype, "temp1_input") != NULL) {
1002                 return -15.096 + 1.4893 * (val / 1000.0);
1003         } */
1004
1005         /* divide voltage and temperature by 1000 */
1006         /* or if any other divisor is given, use that */
1007         if (strcmp(type, "tempf") == 0) {
1008                 if (divisor > 1) {
1009                         return ((val / divisor + 40) * 9.0 / 5) - 40;
1010                 } else if (divisor) {
1011                         return ((val / 1000.0 + 40) * 9.0 / 5) - 40;
1012                 } else {
1013                         return ((val + 40) * 9.0 / 5) - 40;
1014                 }
1015         } else {
1016                 if (divisor > 1) {
1017                         return val / divisor;
1018                 } else if (divisor) {
1019                         return val / 1000.0;
1020                 } else {
1021                         return val;
1022                 }
1023         }
1024 }
1025
1026 #define HWMON_RESET() {\
1027                 buf1[0] = 0; \
1028                 factor = 1.0; \
1029                 offset = 0.0; }
1030
1031 static void parse_sysfs_sensor(struct text_object *obj, const char *arg, const char *path, const char *type)
1032 {
1033         char buf1[64], buf2[64];
1034         float factor, offset;
1035         int n, found = 0;
1036         struct sysfs *sf;
1037
1038         if (sscanf(arg, "%63s %d %f %f", buf2, &n, &factor, &offset) == 4) found = 1; else HWMON_RESET();
1039         if (!found && sscanf(arg, "%63s %63s %d %f %f", buf1, buf2, &n, &factor, &offset) == 5) found = 1; else if (!found) HWMON_RESET();
1040         if (!found && sscanf(arg, "%63s %63s %d", buf1, buf2, &n) == 3) found = 1; else if (!found) HWMON_RESET();
1041         if (!found && sscanf(arg, "%63s %d", buf2, &n) == 2) found = 1; else if (!found) HWMON_RESET();
1042
1043         if (!found) {
1044                 NORM_ERR("i2c failed to parse arguments");
1045                 obj->type = OBJ_text;
1046                 return;
1047         }
1048         DBGP("parsed %s args: '%s' '%s' %d %f %f\n", type, buf1, buf2, n, factor, offset);
1049         sf = malloc(sizeof(struct sysfs));
1050         memset(sf, 0, sizeof(struct sysfs));
1051         sf->fd = open_sysfs_sensor(path, (*buf1) ? buf1 : 0, buf2, n,
1052                         &sf->arg, sf->devtype);
1053         strncpy(sf->type, buf2, 63);
1054         sf->factor = factor;
1055         sf->offset = offset;
1056         obj->data.opaque = sf;
1057 }
1058
1059 #define PARSER_GENERATOR(name, path)                                \
1060 void parse_##name##_sensor(struct text_object *obj, const char *arg) \
1061 {                                                                   \
1062         parse_sysfs_sensor(obj, arg, path, #name);           \
1063 }
1064
1065 PARSER_GENERATOR(i2c, "/sys/bus/i2c/devices/")
1066 PARSER_GENERATOR(hwmon, "/sys/class/hwmon/")
1067 PARSER_GENERATOR(platform, "/sys/bus/platform/devices/")
1068
1069 void print_sysfs_sensor(struct text_object *obj, char *p, int p_max_size)
1070 {
1071         double r;
1072         struct sysfs *sf = obj->data.opaque;
1073
1074         if (!sf)
1075                 return;
1076
1077         r = get_sysfs_info(&sf->fd, sf->arg,
1078                         sf->devtype, sf->type);
1079
1080         r = r * sf->factor + sf->offset;
1081
1082         if (!strncmp(sf->type, "temp", 4)) {
1083                 temp_print(p, p_max_size, r, TEMP_CELSIUS);
1084         } else if (r >= 100.0 || r == 0) {
1085                 snprintf(p, p_max_size, "%d", (int) r);
1086         } else {
1087                 snprintf(p, p_max_size, "%.1f", r);
1088         }
1089 }
1090
1091 void free_sysfs_sensor(struct text_object *obj)
1092 {
1093         struct sysfs *sf = obj->data.opaque;
1094
1095         if (!sf)
1096                 return;
1097
1098         close(sf->fd);
1099         free(obj->data.opaque);
1100         obj->data.opaque = NULL;
1101 }
1102
1103 #define CPUFREQ_PREFIX "/sys/devices/system/cpu"
1104 #define CPUFREQ_POSTFIX "cpufreq/scaling_cur_freq"
1105
1106 /* return system frequency in MHz (use divisor=1) or GHz (use divisor=1000) */
1107 char get_freq(char *p_client_buffer, size_t client_buffer_size,
1108                 const char *p_format, int divisor, unsigned int cpu)
1109 {
1110         FILE *f;
1111         static int rep = 0;
1112         char frequency[32];
1113         char s[256];
1114         double freq = 0;
1115
1116         if (!p_client_buffer || client_buffer_size <= 0 || !p_format
1117                         || divisor <= 0) {
1118                 return 0;
1119         }
1120
1121         if (!prefer_proc) {
1122                 char current_freq_file[128];
1123
1124                 snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu - 1,
1125                         CPUFREQ_POSTFIX);
1126                 f = fopen(current_freq_file, "r");
1127                 if (f) {
1128                         /* if there's a cpufreq /sys node, read the current frequency from
1129                          * this node and divide by 1000 to get Mhz. */
1130                         if (fgets(s, sizeof(s), f)) {
1131                                 s[strlen(s) - 1] = '\0';
1132                                 freq = strtod(s, NULL);
1133                         }
1134                         fclose(f);
1135                         snprintf(p_client_buffer, client_buffer_size, p_format,
1136                                 (freq / 1000) / divisor);
1137                         return 1;
1138                 }
1139         }
1140
1141         // open the CPU information file
1142         f = open_file("/proc/cpuinfo", &rep);
1143         if (!f) {
1144                 perror(PACKAGE_NAME": Failed to access '/proc/cpuinfo' at get_freq()");
1145                 return 0;
1146         }
1147
1148         // read the file
1149         while (fgets(s, sizeof(s), f) != NULL) {
1150
1151 #if defined(__i386) || defined(__x86_64)
1152                 // and search for the cpu mhz
1153                 if (strncmp(s, "cpu MHz", 7) == 0 && cpu == 0) {
1154 #else
1155 #if defined(__alpha)
1156                 // different on alpha
1157                 if (strncmp(s, "cycle frequency [Hz]", 20) == 0 && cpu == 0) {
1158 #else
1159                 // this is different on ppc for some reason
1160                 if (strncmp(s, "clock", 5) == 0 && cpu == 0) {
1161 #endif // defined(__alpha)
1162 #endif // defined(__i386) || defined(__x86_64)
1163
1164                         // copy just the number
1165                         strcpy(frequency, strchr(s, ':') + 2);
1166 #if defined(__alpha)
1167                         // strip " est.\n"
1168                         frequency[strlen(frequency) - 6] = '\0';
1169                         // kernel reports in Hz
1170                         freq = strtod(frequency, NULL) / 1000000;
1171 #else
1172                         // strip \n
1173                         frequency[strlen(frequency) - 1] = '\0';
1174                         freq = strtod(frequency, NULL);
1175 #endif
1176                         break;
1177                 }
1178                 if (strncmp(s, "processor", 9) == 0) {
1179                         cpu--;
1180                         continue;
1181                 }
1182         }
1183
1184         fclose(f);
1185         snprintf(p_client_buffer, client_buffer_size, p_format,
1186                 (float) freq / divisor);
1187         return 1;
1188 }
1189
1190 #define CPUFREQ_VOLTAGE "cpufreq/scaling_voltages"
1191
1192 /* /sys/devices/system/cpu/cpu0/cpufreq/scaling_voltages looks something
1193  * like this:
1194 # frequency voltage
1195 1800000 1340
1196 1600000 1292
1197 1400000 1100
1198 1200000 988
1199 1000000 1116
1200 800000 1004
1201 600000 988
1202  * Peter Tarjan (ptarjan@citromail.hu) */
1203
1204 /* return cpu voltage in mV (use divisor=1) or V (use divisor=1000) */
1205 static char get_voltage(char *p_client_buffer, size_t client_buffer_size,
1206                 const char *p_format, int divisor, unsigned int cpu)
1207 {
1208         FILE *f;
1209         char s[256];
1210         int freq = 0;
1211         int voltage = 0;
1212         char current_freq_file[128];
1213         int freq_comp = 0;
1214
1215         /* build the voltage file name */
1216         cpu--;
1217         snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu,
1218                 CPUFREQ_POSTFIX);
1219
1220         if (!p_client_buffer || client_buffer_size <= 0 || !p_format
1221                         || divisor <= 0) {
1222                 return 0;
1223         }
1224
1225         /* read the current cpu frequency from the /sys node */
1226         f = fopen(current_freq_file, "r");
1227         if (f) {
1228                 if (fgets(s, sizeof(s), f)) {
1229                         s[strlen(s) - 1] = '\0';
1230                         freq = strtod(s, NULL);
1231                 }
1232                 fclose(f);
1233         } else {
1234                 fprintf(stderr, PACKAGE_NAME": Failed to access '%s' at ", current_freq_file);
1235                 perror("get_voltage()");
1236                 if (f) {
1237                         fclose(f);
1238                 }
1239                 return 0;
1240         }
1241
1242         snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu,
1243                 CPUFREQ_VOLTAGE);
1244
1245         /* use the current cpu frequency to find the corresponding voltage */
1246         f = fopen(current_freq_file, "r");
1247
1248         if (f) {
1249                 while (!feof(f)) {
1250                         char line[256];
1251
1252                         if (fgets(line, 255, f) == NULL) {
1253                                 break;
1254                         }
1255                         sscanf(line, "%d %d", &freq_comp, &voltage);
1256                         if (freq_comp == freq) {
1257                                 break;
1258                         }
1259                 }
1260                 fclose(f);
1261         } else {
1262                 fprintf(stderr, PACKAGE_NAME": Failed to access '%s' at ", current_freq_file);
1263                 perror("get_voltage()");
1264                 if (f) {
1265                         fclose(f);
1266                 }
1267                 return 0;
1268         }
1269         snprintf(p_client_buffer, client_buffer_size, p_format,
1270                 (float) voltage / divisor);
1271         return 1;
1272 }
1273
1274 void print_voltage_mv(struct text_object *obj, char *p, int p_max_size)
1275 {
1276         static int ok = 1;
1277         if (ok) {
1278                 ok = get_voltage(p, p_max_size, "%.0f", 1, obj->data.i);
1279         }
1280 }
1281
1282 void print_voltage_v(struct text_object *obj, char *p, int p_max_size)
1283 {
1284         static int ok = 1;
1285         if (ok) {
1286                 ok = get_voltage(p, p_max_size, "%'.3f", 1000, obj->data.i);
1287         }
1288 }
1289
1290 #define ACPI_FAN_DIR "/proc/acpi/fan/"
1291
1292 void get_acpi_fan(char *p_client_buffer, size_t client_buffer_size)
1293 {
1294         static int rep = 0;
1295         char buf[256];
1296         char buf2[256];
1297         FILE *fp;
1298
1299         if (!p_client_buffer || client_buffer_size <= 0) {
1300                 return;
1301         }
1302
1303         /* yeah, slow... :/ */
1304         if (!get_first_file_in_a_directory(ACPI_FAN_DIR, buf, &rep)) {
1305                 snprintf(p_client_buffer, client_buffer_size, "no fans?");
1306                 return;
1307         }
1308
1309         snprintf(buf2, sizeof(buf2), "%s%s/state", ACPI_FAN_DIR, buf);
1310
1311         fp = open_file(buf2, &rep);
1312         if (!fp) {
1313                 snprintf(p_client_buffer, client_buffer_size,
1314                         "can't open fan's state file");
1315                 return;
1316         }
1317         memset(buf, 0, sizeof(buf));
1318         fscanf(fp, "%*s %99s", buf);
1319         fclose(fp);
1320
1321         snprintf(p_client_buffer, client_buffer_size, "%s", buf);
1322 }
1323
1324 #define SYSFS_AC_ADAPTER_DIR "/sys/class/power_supply"
1325 #define ACPI_AC_ADAPTER_DIR "/proc/acpi/ac_adapter/"
1326 /* Linux 2.6.25 onwards ac adapter info is in
1327    /sys/class/power_supply/AC/
1328    On my system I get the following.
1329      /sys/class/power_supply/AC/uevent:
1330      PHYSDEVPATH=/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:01/PNP0C09:00/ACPI0003:00
1331      PHYSDEVBUS=acpi
1332      PHYSDEVDRIVER=ac
1333      POWER_SUPPLY_NAME=AC
1334      POWER_SUPPLY_TYPE=Mains
1335      POWER_SUPPLY_ONLINE=1
1336
1337    Update: it seems the folder name is hardware-dependent. We add an aditional adapter
1338    argument, specifying the folder name.
1339 */
1340
1341 void get_acpi_ac_adapter(char *p_client_buffer, size_t client_buffer_size, const char *adapter)
1342 {
1343         static int rep = 0;
1344
1345         char buf[256];
1346         char buf2[256];
1347         FILE *fp;
1348
1349         if (!p_client_buffer || client_buffer_size <= 0) {
1350                 return;
1351         }
1352
1353         snprintf(buf2, sizeof(buf2), "%s/%s/uevent", SYSFS_AC_ADAPTER_DIR, adapter);
1354         fp = open_file(buf2, &rep);
1355         if (fp) {
1356                 /* sysfs processing */
1357                 while (!feof(fp)) {
1358                         if (fgets(buf, sizeof(buf), fp) == NULL)
1359                                 break;
1360
1361                         if (strncmp(buf, "POWER_SUPPLY_ONLINE=", 20) == 0) {
1362                                 int online = 0;
1363                                 sscanf(buf, "POWER_SUPPLY_ONLINE=%d", &online);
1364                                 snprintf(p_client_buffer, client_buffer_size,
1365                                          "%s-line", (online ? "on" : "off"));
1366                                 break;
1367                         }
1368                 }
1369                 fclose(fp);
1370         } else {
1371                 /* yeah, slow... :/ */
1372                 if (!get_first_file_in_a_directory(ACPI_AC_ADAPTER_DIR, buf, &rep)) {
1373                         snprintf(p_client_buffer, client_buffer_size, "no ac_adapters?");
1374                         return;
1375                 }
1376
1377                 snprintf(buf2, sizeof(buf2), "%s%s/state", ACPI_AC_ADAPTER_DIR, buf);
1378
1379                 fp = open_file(buf2, &rep);
1380                 if (!fp) {
1381                         snprintf(p_client_buffer, client_buffer_size,
1382                                  "No ac adapter found.... where is it?");
1383                         return;
1384                 }
1385                 memset(buf, 0, sizeof(buf));
1386                 fscanf(fp, "%*s %99s", buf);
1387                 fclose(fp);
1388
1389                 snprintf(p_client_buffer, client_buffer_size, "%s", buf);
1390         }
1391 }
1392
1393 /*
1394 /proc/acpi/thermal_zone/THRM/cooling_mode
1395 cooling mode:            active
1396 /proc/acpi/thermal_zone/THRM/polling_frequency
1397 <polling disabled>
1398 /proc/acpi/thermal_zone/THRM/state
1399 state:                   ok
1400 /proc/acpi/thermal_zone/THRM/temperature
1401 temperature:             45 C
1402 /proc/acpi/thermal_zone/THRM/trip_points
1403 critical (S5):           73 C
1404 passive:                 73 C: tc1=4 tc2=3 tsp=40 devices=0xcdf6e6c0
1405 */
1406
1407 #define ACPI_THERMAL_DIR "/proc/acpi/thermal_zone/"
1408 #define ACPI_THERMAL_FORMAT "/proc/acpi/thermal_zone/%s/temperature"
1409
1410 int open_acpi_temperature(const char *name)
1411 {
1412         char path[256];
1413         char buf[256];
1414         int fd;
1415
1416         if (name == NULL || strcmp(name, "*") == 0) {
1417                 static int rep = 0;
1418
1419                 if (!get_first_file_in_a_directory(ACPI_THERMAL_DIR, buf, &rep)) {
1420                         return -1;
1421                 }
1422                 name = buf;
1423         }
1424
1425         snprintf(path, 255, ACPI_THERMAL_FORMAT, name);
1426
1427         fd = open(path, O_RDONLY);
1428         if (fd < 0) {
1429                 NORM_ERR("can't open '%s': %s", path, strerror(errno));
1430         }
1431
1432         return fd;
1433 }
1434
1435 static double last_acpi_temp;
1436 static double last_acpi_temp_time;
1437
1438 double get_acpi_temperature(int fd)
1439 {
1440         if (fd <= 0) {
1441                 return 0;
1442         }
1443
1444         /* don't update acpi temperature too often */
1445         if (current_update_time - last_acpi_temp_time < 11.32) {
1446                 return last_acpi_temp;
1447         }
1448         last_acpi_temp_time = current_update_time;
1449
1450         /* seek to beginning */
1451         lseek(fd, 0, SEEK_SET);
1452
1453         /* read */
1454         {
1455                 char buf[256];
1456                 int n;
1457
1458                 n = read(fd, buf, 255);
1459                 if (n < 0) {
1460                         NORM_ERR("can't read fd %d: %s", fd, strerror(errno));
1461                 } else {
1462                         buf[n] = '\0';
1463                         sscanf(buf, "temperature: %lf", &last_acpi_temp);
1464                 }
1465         }
1466
1467         return last_acpi_temp;
1468 }
1469
1470 /*
1471 hipo@lepakko hipo $ cat /proc/acpi/battery/BAT1/info
1472 present:                 yes
1473 design capacity:         4400 mAh
1474 last full capacity:      4064 mAh
1475 battery technology:      rechargeable
1476 design voltage:          14800 mV
1477 design capacity warning: 300 mAh
1478 design capacity low:     200 mAh
1479 capacity granularity 1:  32 mAh
1480 capacity granularity 2:  32 mAh
1481 model number:            02KT
1482 serial number:           16922
1483 battery type:            LION
1484 OEM info:                SANYO
1485 */
1486
1487 /*
1488 hipo@lepakko conky $ cat /proc/acpi/battery/BAT1/state
1489 present:                 yes
1490 capacity state:          ok
1491 charging state:          unknown
1492 present rate:            0 mA
1493 remaining capacity:      4064 mAh
1494 present voltage:         16608 mV
1495 */
1496
1497 /*
1498 2213<@jupet�kellari��> jupet@lagi-unstable:~$ cat /proc/apm
1499 2213<@jupet�kellari��> 1.16 1.2 0x03 0x01 0xff 0x10 -1% -1 ?
1500 2213<@jupet�kellari��> (-1 ollee ei akkua kiinni, koska akku on p�yd�ll�)
1501 2214<@jupet�kellari��> jupet@lagi-unstable:~$ cat /proc/apm
1502 2214<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x03 0x09 98% -1 ?
1503
1504 2238<@jupet�kellari��> 1.16 1.2 0x03 0x00 0x00 0x01 100% -1 ? ilman verkkovirtaa
1505 2239<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x00 0x01 99% -1 ? verkkovirralla
1506
1507 2240<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x03 0x09 100% -1 ? verkkovirralla ja monitori p��ll�
1508 2241<@jupet�kellari��> 1.16 1.2 0x03 0x00 0x00 0x01 99% -1 ? monitori p��ll� mutta ilman verkkovirtaa
1509 */
1510
1511 /* Kapil Hari Paranjape <kapil@imsc.res.in>
1512   Linux 2.6.24 onwards battery info is in
1513   /sys/class/power_supply/BAT0/
1514   On my system I get the following.
1515         /sys/class/power_supply/BAT0/uevent:
1516         PHYSDEVPATH=/devices/LNXSYSTM:00/device:00/PNP0A03:00/device:01/PNP0C09:00/PNP0C0A:00
1517         PHYSDEVBUS=acpi
1518         PHYSDEVDRIVER=battery
1519         POWER_SUPPLY_NAME=BAT0
1520         POWER_SUPPLY_TYPE=Battery
1521         POWER_SUPPLY_STATUS=Discharging
1522         POWER_SUPPLY_PRESENT=1
1523         POWER_SUPPLY_TECHNOLOGY=Li-ion
1524         POWER_SUPPLY_VOLTAGE_MIN_DESIGN=10800000
1525         POWER_SUPPLY_VOLTAGE_NOW=10780000
1526         POWER_SUPPLY_CURRENT_NOW=13970000
1527         POWER_SUPPLY_ENERGY_FULL_DESIGN=47510000
1528         POWER_SUPPLY_ENERGY_FULL=27370000
1529         POWER_SUPPLY_ENERGY_NOW=11810000
1530         POWER_SUPPLY_MODEL_NAME=IBM-92P1060
1531         POWER_SUPPLY_MANUFACTURER=Panasonic
1532   On some systems POWER_SUPPLY_ENERGY_* is replaced by POWER_SUPPLY_CHARGE_*
1533 */
1534
1535 #define SYSFS_BATTERY_BASE_PATH "/sys/class/power_supply"
1536 #define ACPI_BATTERY_BASE_PATH "/proc/acpi/battery"
1537 #define APM_PATH "/proc/apm"
1538 #define MAX_BATTERY_COUNT 4
1539
1540 static FILE *sysfs_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1541 static FILE *acpi_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1542 static FILE *apm_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1543
1544 static int batteries_initialized = 0;
1545 static char batteries[MAX_BATTERY_COUNT][32];
1546
1547 static int acpi_last_full[MAX_BATTERY_COUNT];
1548 static int acpi_design_capacity[MAX_BATTERY_COUNT];
1549
1550 /* e.g. "charging 75%" */
1551 static char last_battery_str[MAX_BATTERY_COUNT][64];
1552 /* e.g. "3h 15m" */
1553 static char last_battery_time_str[MAX_BATTERY_COUNT][64];
1554
1555 static double last_battery_time[MAX_BATTERY_COUNT];
1556
1557 static int last_battery_perct[MAX_BATTERY_COUNT];
1558 static double last_battery_perct_time[MAX_BATTERY_COUNT];
1559
1560 void init_batteries(void)
1561 {
1562         int idx;
1563
1564         if (batteries_initialized) {
1565                 return;
1566         }
1567 #ifdef HAVE_OPENMP
1568 #pragma omp parallel for schedule(dynamic,10)
1569 #endif /* HAVE_OPENMP */
1570         for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) {
1571                 batteries[idx][0] = '\0';
1572         }
1573         batteries_initialized = 1;
1574 }
1575
1576 int get_battery_idx(const char *bat)
1577 {
1578         int idx;
1579
1580         for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) {
1581                 if (!strlen(batteries[idx]) || !strcmp(batteries[idx], bat)) {
1582                         break;
1583                 }
1584         }
1585
1586         /* if not found, enter a new entry */
1587         if (!strlen(batteries[idx])) {
1588                 snprintf(batteries[idx], 31, "%s", bat);
1589         }
1590
1591         return idx;
1592 }
1593
1594 void set_return_value(char *buffer, unsigned int n, int item, int idx);
1595
1596 void get_battery_stuff(char *buffer, unsigned int n, const char *bat, int item)
1597 {
1598         static int idx, rep = 0, rep1 = 0, rep2 = 0;
1599         char acpi_path[128];
1600         char sysfs_path[128];
1601
1602         snprintf(acpi_path, 127, ACPI_BATTERY_BASE_PATH "/%s/state", bat);
1603         snprintf(sysfs_path, 127, SYSFS_BATTERY_BASE_PATH "/%s/uevent", bat);
1604
1605         init_batteries();
1606
1607         idx = get_battery_idx(bat);
1608
1609         /* don't update battery too often */
1610         if (current_update_time - last_battery_time[idx] < 29.5) {
1611                 set_return_value(buffer, n, item, idx);
1612                 return;
1613         }
1614
1615         last_battery_time[idx] = current_update_time;
1616
1617         memset(last_battery_str[idx], 0, sizeof(last_battery_str[idx]));
1618         memset(last_battery_time_str[idx], 0, sizeof(last_battery_time_str[idx]));
1619
1620         /* first try SYSFS if that fails try ACPI */
1621
1622         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1623                 sysfs_bat_fp[idx] = open_file(sysfs_path, &rep);
1624         }
1625
1626         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1627                 acpi_bat_fp[idx] = open_file(acpi_path, &rep1);
1628         }
1629
1630         if (sysfs_bat_fp[idx] != NULL) {
1631                 /* SYSFS */
1632                 int present_rate = -1;
1633                 int remaining_capacity = -1;
1634                 char charging_state[64];
1635                 char present[4];
1636
1637                 strcpy(charging_state, "unknown");
1638
1639                 while (!feof(sysfs_bat_fp[idx])) {
1640                         char buf[256];
1641                         if (fgets(buf, 256, sysfs_bat_fp[idx]) == NULL)
1642                                 break;
1643
1644                         /* let's just hope units are ok */
1645                         if (strncmp (buf, "POWER_SUPPLY_PRESENT=1", 22) == 0)
1646                                 strcpy(present, "yes");
1647                         else if (strncmp (buf, "POWER_SUPPLY_PRESENT=0", 22) == 0)
1648                                 strcpy(present, "no");
1649                         else if (strncmp (buf, "POWER_SUPPLY_STATUS=", 20) == 0)
1650                                 sscanf(buf, "POWER_SUPPLY_STATUS=%63s", charging_state);
1651                         /* present_rate is not the same as the
1652                         current flowing now but it is the same value
1653                         which was used in the past. so we continue
1654                         the tradition! */
1655                         else if (strncmp(buf, "POWER_SUPPLY_CURRENT_NOW=", 25) == 0)
1656                                 sscanf(buf, "POWER_SUPPLY_CURRENT_NOW=%d", &present_rate);
1657                         else if (strncmp(buf, "POWER_SUPPLY_ENERGY_NOW=", 24) == 0)
1658                                 sscanf(buf, "POWER_SUPPLY_ENERGY_NOW=%d", &remaining_capacity);
1659                         else if (strncmp(buf, "POWER_SUPPLY_ENERGY_FULL=", 25) == 0)
1660                                 sscanf(buf, "POWER_SUPPLY_ENERGY_FULL=%d", &acpi_last_full[idx]);
1661                         else if (strncmp(buf, "POWER_SUPPLY_CHARGE_NOW=", 24) == 0)
1662                                 sscanf(buf, "POWER_SUPPLY_CHARGE_NOW=%d", &remaining_capacity);
1663                         else if (strncmp(buf, "POWER_SUPPLY_CHARGE_FULL=", 25) == 0)
1664                                 sscanf(buf, "POWER_SUPPLY_CHARGE_FULL=%d", &acpi_last_full[idx]);
1665                 }
1666
1667                 fclose(sysfs_bat_fp[idx]);
1668                 sysfs_bat_fp[idx] = NULL;
1669
1670                 /* Hellf[i]re notes that remaining capacity can exceed acpi_last_full */
1671                 if (remaining_capacity > acpi_last_full[idx])
1672                         acpi_last_full[idx] = remaining_capacity;  /* normalize to 100% */
1673
1674                 /* not present */
1675                 if (strcmp(present, "No") == 0) {
1676                         strncpy(last_battery_str[idx], "not present", 64);
1677                 }
1678                 /* charging */
1679                 else if (strcmp(charging_state, "Charging") == 0) {
1680                         if (acpi_last_full[idx] != 0 && present_rate > 0) {
1681                                 /* e.g. charging 75% */
1682                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "charging %i%%",
1683                                         (int) (((float) remaining_capacity / acpi_last_full[idx]) * 100 ));
1684                                 /* e.g. 2h 37m */
1685                                 format_seconds(last_battery_time_str[idx], sizeof(last_battery_time_str[idx])-1,
1686                                               (long) (((float)(acpi_last_full[idx] - remaining_capacity) / present_rate) * 3600));
1687                         } else if (acpi_last_full[idx] != 0 && present_rate <= 0) {
1688                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "charging %d%%",
1689                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1690                                 snprintf(last_battery_time_str[idx],
1691                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1692                         } else {
1693                                 strncpy(last_battery_str[idx], "charging", sizeof(last_battery_str[idx])-1);
1694                                 snprintf(last_battery_time_str[idx],
1695                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1696                         }
1697                 }
1698                 /* discharging */
1699                 else if (strncmp(charging_state, "Discharging", 64) == 0) {
1700                         if (present_rate > 0) {
1701                                 /* e.g. discharging 35% */
1702                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "discharging %i%%",
1703                                         (int) (((float) remaining_capacity / acpi_last_full[idx]) * 100 ));
1704                                 /* e.g. 1h 12m */
1705                                 format_seconds(last_battery_time_str[idx], sizeof(last_battery_time_str[idx])-1,
1706                                               (long) (((float) remaining_capacity / present_rate) * 3600));
1707                         } else if (present_rate == 0) { /* Thanks to Nexox for this one */
1708                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "full");
1709                                 snprintf(last_battery_time_str[idx],
1710                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1711                         } else {
1712                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1,
1713                                         "discharging %d%%",
1714                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1715                                 snprintf(last_battery_time_str[idx],
1716                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1717                         }
1718                 }
1719                 /* charged */
1720                 /* thanks to Lukas Zapletal <lzap@seznam.cz> */
1721                 else if (strncmp(charging_state, "Charged", 64) == 0 || strncmp(charging_state, "Full", 64) == 0) {
1722                                 /* Below happens with the second battery on my X40,
1723                                  * when the second one is empty and the first one
1724                                  * being charged. */
1725                                 if (remaining_capacity == 0)
1726                                         strcpy(last_battery_str[idx], "empty");
1727                                 else
1728                                         strcpy(last_battery_str[idx], "charged");
1729                 }
1730                 /* unknown, probably full / AC */
1731                 else {
1732                         if (acpi_last_full[idx] != 0
1733                             && remaining_capacity != acpi_last_full[idx])
1734                                 snprintf(last_battery_str[idx], 64, "unknown %d%%",
1735                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1736                         else
1737                                 strncpy(last_battery_str[idx], "AC", 64);
1738                 }
1739         } else if (acpi_bat_fp[idx] != NULL) {
1740                 /* ACPI */
1741                 int present_rate = -1;
1742                 int remaining_capacity = -1;
1743                 char charging_state[64];
1744                 char present[4];
1745
1746                 /* read last full capacity if it's zero */
1747                 if (acpi_last_full[idx] == 0) {
1748                         static int rep3 = 0;
1749                         char path[128];
1750                         FILE *fp;
1751
1752                         snprintf(path, 127, ACPI_BATTERY_BASE_PATH "/%s/info", bat);
1753                         fp = open_file(path, &rep3);
1754                         if (fp != NULL) {
1755                                 while (!feof(fp)) {
1756                                         char b[256];
1757
1758                                         if (fgets(b, 256, fp) == NULL) {
1759                                                 break;
1760                                         }
1761                                         if (sscanf(b, "last full capacity: %d",
1762                                                                 &acpi_last_full[idx]) != 0) {
1763                                                 break;
1764                                         }
1765                                 }
1766
1767                                 fclose(fp);
1768                         }
1769                 }
1770
1771                 fseek(acpi_bat_fp[idx], 0, SEEK_SET);
1772
1773                 strcpy(charging_state, "unknown");
1774
1775                 while (!feof(acpi_bat_fp[idx])) {
1776                         char buf[256];
1777
1778                         if (fgets(buf, 256, acpi_bat_fp[idx]) == NULL) {
1779                                 break;
1780                         }
1781
1782                         /* let's just hope units are ok */
1783                         if (strncmp(buf, "present:", 8) == 0) {
1784                                 sscanf(buf, "present: %4s", present);
1785                         } else if (strncmp(buf, "charging state:", 15) == 0) {
1786                                 sscanf(buf, "charging state: %63s", charging_state);
1787                         } else if (strncmp(buf, "present rate:", 13) == 0) {
1788                                 sscanf(buf, "present rate: %d", &present_rate);
1789                         } else if (strncmp(buf, "remaining capacity:", 19) == 0) {
1790                                 sscanf(buf, "remaining capacity: %d", &remaining_capacity);
1791                         }
1792                 }
1793                 /* Hellf[i]re notes that remaining capacity can exceed acpi_last_full */
1794                 if (remaining_capacity > acpi_last_full[idx]) {
1795                         /* normalize to 100% */
1796                         acpi_last_full[idx] = remaining_capacity;
1797                 }
1798
1799                 /* not present */
1800                 if (strcmp(present, "no") == 0) {
1801                         strncpy(last_battery_str[idx], "not present", 64);
1802                         /* charging */
1803                 } else if (strcmp(charging_state, "charging") == 0) {
1804                         if (acpi_last_full[idx] != 0 && present_rate > 0) {
1805                                 /* e.g. charging 75% */
1806                                 snprintf(last_battery_str[idx],
1807                                                 sizeof(last_battery_str[idx]) - 1, "charging %i%%",
1808                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1809                                 /* e.g. 2h 37m */
1810                                 format_seconds(last_battery_time_str[idx],
1811                                                 sizeof(last_battery_time_str[idx]) - 1,
1812                                                 (long) (((acpi_last_full[idx] - remaining_capacity) *
1813                                                                 3600) / present_rate));
1814                         } else if (acpi_last_full[idx] != 0 && present_rate <= 0) {
1815                                 snprintf(last_battery_str[idx],
1816                                                 sizeof(last_battery_str[idx]) - 1, "charging %d%%",
1817                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1818                                 snprintf(last_battery_time_str[idx],
1819                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1820                         } else {
1821                                 strncpy(last_battery_str[idx], "charging",
1822                                                 sizeof(last_battery_str[idx]) - 1);
1823                                 snprintf(last_battery_time_str[idx],
1824                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1825                         }
1826                         /* discharging */
1827                 } else if (strncmp(charging_state, "discharging", 64) == 0) {
1828                         if (present_rate > 0) {
1829                                 /* e.g. discharging 35% */
1830                                 snprintf(last_battery_str[idx],
1831                                                 sizeof(last_battery_str[idx]) - 1, "discharging %i%%",
1832                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1833                                 /* e.g. 1h 12m */
1834                                 format_seconds(last_battery_time_str[idx],
1835                                                 sizeof(last_battery_time_str[idx]) - 1,
1836                                                 (long) ((remaining_capacity * 3600) / present_rate));
1837                         } else if (present_rate == 0) { /* Thanks to Nexox for this one */
1838                                 snprintf(last_battery_str[idx],
1839                                                 sizeof(last_battery_str[idx]) - 1, "full");
1840                                 snprintf(last_battery_time_str[idx],
1841                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1842                         } else {
1843                                 snprintf(last_battery_str[idx],
1844                                                 sizeof(last_battery_str[idx]) - 1, "discharging %d%%",
1845                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1846                                 snprintf(last_battery_time_str[idx],
1847                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1848                         }
1849                         /* charged */
1850                 } else if (strncmp(charging_state, "charged", 64) == 0) {
1851                         /* thanks to Lukas Zapletal <lzap@seznam.cz> */
1852                         /* Below happens with the second battery on my X40,
1853                          * when the second one is empty and the first one being charged. */
1854                         if (remaining_capacity == 0) {
1855                                 strcpy(last_battery_str[idx], "empty");
1856                         } else {
1857                                 strcpy(last_battery_str[idx], "charged");
1858                         }
1859                         /* unknown, probably full / AC */
1860                 } else {
1861                         if (strncmp(charging_state, "Full", 64) == 0) {
1862                                 strncpy(last_battery_str[idx], "full", 64);
1863                         } else if (acpi_last_full[idx] != 0
1864                                         && remaining_capacity != acpi_last_full[idx]) {
1865                                 snprintf(last_battery_str[idx], 64, "unknown %d%%",
1866                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1867                         } else {
1868                                 strncpy(last_battery_str[idx], "AC", 64);
1869                         }
1870                 }
1871                 fclose(acpi_bat_fp[idx]);
1872                 acpi_bat_fp[idx] = NULL;
1873         } else {
1874                 /* APM */
1875                 if (apm_bat_fp[idx] == NULL) {
1876                         apm_bat_fp[idx] = open_file(APM_PATH, &rep2);
1877                 }
1878
1879                 if (apm_bat_fp[idx] != NULL) {
1880                         unsigned int ac, status, flag;
1881                         int life;
1882
1883                         fscanf(apm_bat_fp[idx], "%*s %*s %*x %x   %x       %x     %d%%",
1884                                 &ac, &status, &flag, &life);
1885
1886                         if (life == -1) {
1887                                 /* could check now that there is ac */
1888                                 snprintf(last_battery_str[idx], 64, "AC");
1889
1890                         /* could check that status == 3 here? */
1891                         } else if (ac && life != 100) {
1892                                 snprintf(last_battery_str[idx], 64, "charging %d%%", life);
1893                         } else {
1894                                 snprintf(last_battery_str[idx], 64, "%d%%", life);
1895                         }
1896
1897                         /* it seemed to buffer it so file must be closed (or could use
1898                          * syscalls directly but I don't feel like coding it now) */
1899                         fclose(apm_bat_fp[idx]);
1900                         apm_bat_fp[idx] = NULL;
1901                 }
1902         }
1903         set_return_value(buffer, n, item, idx);
1904 }
1905
1906 void set_return_value(char *buffer, unsigned int n, int item, int idx)
1907 {
1908         switch (item) {
1909                 case BATTERY_STATUS:
1910                         snprintf(buffer, n, "%s", last_battery_str[idx]);
1911                         break;
1912                 case BATTERY_TIME:
1913                         snprintf(buffer, n, "%s", last_battery_time_str[idx]);
1914                         break;
1915                 default:
1916                         break;
1917         }
1918 }
1919
1920 void get_battery_short_status(char *buffer, unsigned int n, const char *bat)
1921 {
1922         get_battery_stuff(buffer, n, bat, BATTERY_STATUS);
1923         if (0 == strncmp("charging", buffer, 8)) {
1924                 buffer[0] = 'C';
1925                 memmove(buffer + 1, buffer + 8, n - 8);
1926         } else if (0 == strncmp("discharging", buffer, 11)) {
1927                 buffer[0] = 'D';
1928                 memmove(buffer + 1, buffer + 11, n - 11);
1929         } else if (0 == strncmp("charged", buffer, 7)) {
1930                 buffer[0] = 'F';
1931                 memmove(buffer + 1, buffer + 7, n - 7);
1932         } else if (0 == strncmp("not present", buffer, 11)) {
1933                 buffer[0] = 'N';
1934                 memmove(buffer + 1, buffer + 11, n - 11);
1935         } else if (0 == strncmp("empty", buffer, 5)) {
1936                 buffer[0] = 'E';
1937                 memmove(buffer + 1, buffer + 5, n - 5);
1938         } else if (0 != strncmp("AC", buffer, 2)) {
1939                 buffer[0] = 'U';
1940                 memmove(buffer + 1, buffer + 11, n - 11);
1941         }
1942 }
1943
1944 int get_battery_perct(const char *bat)
1945 {
1946         static int rep = 0;
1947         int idx;
1948         char acpi_path[128];
1949         char sysfs_path[128];
1950         int remaining_capacity = -1;
1951
1952         snprintf(acpi_path, 127, ACPI_BATTERY_BASE_PATH "/%s/state", bat);
1953         snprintf(sysfs_path, 127, SYSFS_BATTERY_BASE_PATH "/%s/uevent", bat);
1954
1955         init_batteries();
1956
1957         idx = get_battery_idx(bat);
1958
1959         /* don't update battery too often */
1960         if (current_update_time - last_battery_perct_time[idx] < 30) {
1961                 return last_battery_perct[idx];
1962         }
1963         last_battery_perct_time[idx] = current_update_time;
1964
1965         /* Only check for SYSFS or ACPI */
1966
1967         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1968                 sysfs_bat_fp[idx] = open_file(sysfs_path, &rep);
1969                 rep = 0;
1970         }
1971
1972         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1973                 acpi_bat_fp[idx] = open_file(acpi_path, &rep);
1974         }
1975
1976         if (sysfs_bat_fp[idx] != NULL) {
1977                 /* SYSFS */
1978                 while (!feof(sysfs_bat_fp[idx])) {
1979                         char buf[256];
1980                         if (fgets(buf, 256, sysfs_bat_fp[idx]) == NULL)
1981                                 break;
1982
1983                         if (strncmp(buf, "POWER_SUPPLY_CHARGE_NOW=", 24) == 0) {
1984                                 sscanf(buf, "POWER_SUPPLY_CHARGE_NOW=%d", &remaining_capacity);
1985                         } else if (strncmp(buf, "POWER_SUPPLY_CHARGE_FULL=",25) == 0) {
1986                                 sscanf(buf, "POWER_SUPPLY_CHARGE_FULL=%d", &acpi_design_capacity[idx]);
1987                         } else if (strncmp(buf, "POWER_SUPPLY_ENERGY_NOW=", 24) == 0) {
1988                                 sscanf(buf, "POWER_SUPPLY_ENERGY_NOW=%d", &remaining_capacity);
1989                         } else if (strncmp(buf, "POWER_SUPPLY_ENERGY_FULL=",25) == 0) {
1990                                 sscanf(buf, "POWER_SUPPLY_ENERGY_FULL=%d", &acpi_design_capacity[idx]);
1991                         }
1992                 }
1993
1994                 fclose(sysfs_bat_fp[idx]);
1995                 sysfs_bat_fp[idx] = NULL;
1996
1997         } else if (acpi_bat_fp[idx] != NULL) {
1998                 /* ACPI */
1999                 /* read last full capacity if it's zero */
2000                 if (acpi_design_capacity[idx] == 0) {
2001                         static int rep2;
2002                         char path[128];
2003                         FILE *fp;
2004
2005                         snprintf(path, 127, ACPI_BATTERY_BASE_PATH "/%s/info", bat);
2006                         fp = open_file(path, &rep2);
2007                         if (fp != NULL) {
2008                                 while (!feof(fp)) {
2009                                         char b[256];
2010
2011                                         if (fgets(b, 256, fp) == NULL) {
2012                                                 break;
2013                                         }
2014                                         if (sscanf(b, "last full capacity: %d",
2015                                                                 &acpi_design_capacity[idx]) != 0) {
2016                                                 break;
2017                                         }
2018                                 }
2019                                 fclose(fp);
2020                         }
2021                 }
2022
2023                 fseek(acpi_bat_fp[idx], 0, SEEK_SET);
2024
2025                 while (!feof(acpi_bat_fp[idx])) {
2026                         char buf[256];
2027
2028                         if (fgets(buf, 256, acpi_bat_fp[idx]) == NULL) {
2029                                 break;
2030                         }
2031
2032                         if (buf[0] == 'r') {
2033                                 sscanf(buf, "remaining capacity: %d", &remaining_capacity);
2034                         }
2035                 }
2036         }
2037         if (remaining_capacity < 0) {
2038                 return 0;
2039         }
2040         /* compute the battery percentage */
2041         last_battery_perct[idx] =
2042                 (int) (((float) remaining_capacity / acpi_design_capacity[idx]) * 100);
2043         if (last_battery_perct[idx] > 100) last_battery_perct[idx] = 100;
2044         return last_battery_perct[idx];
2045 }
2046
2047 int get_battery_perct_bar(const char *bar)
2048 {
2049         int idx;
2050
2051         get_battery_perct(bar);
2052         idx = get_battery_idx(bar);
2053         return (int) (last_battery_perct[idx] * 2.56 - 1);
2054 }
2055
2056 /* On Apple powerbook and ibook:
2057 $ cat /proc/pmu/battery_0
2058 flags      : 00000013
2059 charge     : 3623
2060 max_charge : 3720
2061 current    : 388
2062 voltage    : 16787
2063 time rem.  : 900
2064 $ cat /proc/pmu/info
2065 PMU driver version     : 2
2066 PMU firmware version   : 0c
2067 AC Power               : 1
2068 Battery count          : 1
2069 */
2070
2071 /* defines as in <linux/pmu.h> */
2072 #define PMU_BATT_PRESENT                0x00000001
2073 #define PMU_BATT_CHARGING               0x00000002
2074
2075 static FILE *pmu_battery_fp;
2076 static FILE *pmu_info_fp;
2077 static char pb_battery_info[3][32];
2078 static double pb_battery_info_update;
2079
2080 #define PMU_PATH "/proc/pmu"
2081 void get_powerbook_batt_info(char *buffer, size_t n, int i)
2082 {
2083         static int rep = 0;
2084         const char *batt_path = PMU_PATH "/battery_0";
2085         const char *info_path = PMU_PATH "/info";
2086         unsigned int flags;
2087         int charge, max_charge, ac = -1;
2088         long timeval = -1;
2089
2090         /* don't update battery too often */
2091         if (current_update_time - pb_battery_info_update < 29.5) {
2092                 snprintf(buffer, n, "%s", pb_battery_info[i]);
2093                 return;
2094         }
2095         pb_battery_info_update = current_update_time;
2096
2097         if (pmu_battery_fp == NULL) {
2098                 pmu_battery_fp = open_file(batt_path, &rep);
2099                 if (pmu_battery_fp == NULL) {
2100                         return;
2101                 }
2102         }
2103
2104         if (pmu_battery_fp != NULL) {
2105                 rewind(pmu_battery_fp);
2106                 while (!feof(pmu_battery_fp)) {
2107                         char buf[32];
2108
2109                         if (fgets(buf, sizeof(buf), pmu_battery_fp) == NULL) {
2110                                 break;
2111                         }
2112
2113                         if (buf[0] == 'f') {
2114                                 sscanf(buf, "flags      : %8x", &flags);
2115                         } else if (buf[0] == 'c' && buf[1] == 'h') {
2116                                 sscanf(buf, "charge     : %d", &charge);
2117                         } else if (buf[0] == 'm') {
2118                                 sscanf(buf, "max_charge : %d", &max_charge);
2119                         } else if (buf[0] == 't') {
2120                                 sscanf(buf, "time rem.  : %ld", &timeval);
2121                         }
2122                 }
2123         }
2124         if (pmu_info_fp == NULL) {
2125                 pmu_info_fp = open_file(info_path, &rep);
2126                 if (pmu_info_fp == NULL) {
2127                         return;
2128                 }
2129         }
2130
2131         if (pmu_info_fp != NULL) {
2132                 rewind(pmu_info_fp);
2133                 while (!feof(pmu_info_fp)) {
2134                         char buf[32];
2135
2136                         if (fgets(buf, sizeof(buf), pmu_info_fp) == NULL) {
2137                                 break;
2138                         }
2139                         if (buf[0] == 'A') {
2140                                 sscanf(buf, "AC Power               : %d", &ac);
2141                         }
2142                 }
2143         }
2144         /* update status string */
2145         if ((ac && !(flags & PMU_BATT_PRESENT))) {
2146                 strncpy(pb_battery_info[PB_BATT_STATUS], "AC", sizeof(pb_battery_info[PB_BATT_STATUS]));
2147         } else if (ac && (flags & PMU_BATT_PRESENT)
2148                         && !(flags & PMU_BATT_CHARGING)) {
2149                 strncpy(pb_battery_info[PB_BATT_STATUS], "charged", sizeof(pb_battery_info[PB_BATT_STATUS]));
2150         } else if ((flags & PMU_BATT_PRESENT) && (flags & PMU_BATT_CHARGING)) {
2151                 strncpy(pb_battery_info[PB_BATT_STATUS], "charging", sizeof(pb_battery_info[PB_BATT_STATUS]));
2152         } else {
2153                 strncpy(pb_battery_info[PB_BATT_STATUS], "discharging", sizeof(pb_battery_info[PB_BATT_STATUS]));
2154         }
2155
2156         /* update percentage string */
2157         if (timeval == 0 && ac && (flags & PMU_BATT_PRESENT)
2158                         && !(flags & PMU_BATT_CHARGING)) {
2159                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2160                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "100%%");
2161         } else if (timeval == 0) {
2162                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2163                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "unknown");
2164         } else {
2165                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2166                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "%d%%",
2167                         (charge * 100) / max_charge);
2168         }
2169
2170         /* update time string */
2171         if (timeval == 0) {                     /* fully charged or battery not present */
2172                 snprintf(pb_battery_info[PB_BATT_TIME],
2173                         sizeof(pb_battery_info[PB_BATT_TIME]), "unknown");
2174         } else if (timeval < 60 * 60) { /* don't show secs */
2175                 format_seconds_short(pb_battery_info[PB_BATT_TIME],
2176                         sizeof(pb_battery_info[PB_BATT_TIME]), timeval);
2177         } else {
2178                 format_seconds(pb_battery_info[PB_BATT_TIME],
2179                         sizeof(pb_battery_info[PB_BATT_TIME]), timeval);
2180         }
2181
2182         snprintf(buffer, n, "%s", pb_battery_info[i]);
2183 }
2184
2185 void update_top(void)
2186 {
2187         process_find_top(info.cpu, info.memu, info.time
2188 #ifdef IOSTATS
2189                 , info.io
2190 #endif
2191                 );
2192         info.first_process = get_first_process();
2193 }
2194
2195 #define ENTROPY_AVAIL_PATH "/proc/sys/kernel/random/entropy_avail"
2196
2197 int get_entropy_avail(unsigned int *val)
2198 {
2199         static int rep = 0;
2200         FILE *fp;
2201
2202         if (!(fp = open_file(ENTROPY_AVAIL_PATH, &rep)))
2203                 return 1;
2204
2205         if (fscanf(fp, "%u", val) != 1)
2206                 return 1;
2207
2208         fclose(fp);
2209         return 0;
2210 }
2211
2212 #define ENTROPY_POOLSIZE_PATH "/proc/sys/kernel/random/poolsize"
2213
2214 int get_entropy_poolsize(unsigned int *val)
2215 {
2216         static int rep = 0;
2217         FILE *fp;
2218
2219         if (!(fp = open_file(ENTROPY_POOLSIZE_PATH, &rep)))
2220                 return 1;
2221
2222         if (fscanf(fp, "%u", val) != 1)
2223                 return 1;
2224
2225         fclose(fp);
2226         return 0;
2227 }
2228
2229 const char *get_disk_protect_queue(const char *disk)
2230 {
2231         FILE *fp;
2232         char path[128];
2233         int state;
2234
2235         snprintf(path, 127, "/sys/block/%s/device/unload_heads", disk);
2236         if (access(path, F_OK)) {
2237                 snprintf(path, 127, "/sys/block/%s/queue/protect", disk);
2238         }
2239         if ((fp = fopen(path, "r")) == NULL)
2240                 return "n/a   ";
2241         if (fscanf(fp, "%d\n", &state) != 1) {
2242                 fclose(fp);
2243                 return "failed";
2244         }
2245         fclose(fp);
2246         return (state > 0) ? "frozen" : "free  ";
2247 }
2248
2249 void update_diskio(void)
2250 {
2251         FILE *fp;
2252         static int rep = 0;
2253         char buf[512], devbuf[64];
2254         unsigned int major, minor;
2255         int col_count = 0;
2256         struct diskio_stat *cur;
2257         unsigned int reads, writes;
2258         unsigned int total_reads = 0, total_writes = 0;
2259
2260         stats.current = 0;
2261         stats.current_read = 0;
2262         stats.current_write = 0;
2263
2264         if (!(fp = open_file("/proc/diskstats", &rep))) {
2265                 return;
2266         }
2267
2268         /* read reads and writes from all disks (minor = 0), including cd-roms
2269          * and floppies, and sum them up */
2270         while (fgets(buf, 512, fp)) {
2271                 col_count = sscanf(buf, "%u %u %s %*u %*u %u %*u %*u %*u %u", &major,
2272                         &minor, devbuf, &reads, &writes);
2273                 /* ignore subdevices (they have only 3 matching entries in their line)
2274                  * and virtual devices (LVM, network block devices, RAM disks, Loopback)
2275                  *
2276                  * XXX: ignore devices which are part of a SW RAID (MD_MAJOR) */
2277                 if (col_count == 5 && major != LVM_BLK_MAJOR && major != NBD_MAJOR
2278                                 && major != RAMDISK_MAJOR && major != LOOP_MAJOR) {
2279                         total_reads += reads;
2280                         total_writes += writes;
2281                 } else {
2282                         col_count = sscanf(buf, "%u %u %s %*u %u %*u %u",
2283                                 &major, &minor, devbuf, &reads, &writes);
2284                         if (col_count != 5) {
2285                                 continue;
2286                         }
2287                 }
2288                 cur = stats.next;
2289                 while (cur && strcmp(devbuf, cur->dev))
2290                         cur = cur->next;
2291
2292                 if (cur)
2293                         update_diskio_values(cur, reads, writes);
2294         }
2295         update_diskio_values(&stats, total_reads, total_writes);
2296         fclose(fp);
2297 }