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

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