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

   1 /* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
   2  * vim: ts=4 sw=4 noet ai cindent syntax=c
   3  *
   4  * Conky, a system monitor, based on torsmo
   5  *
   6  * Any original torsmo code is licensed under the BSD license
   7  *
   8  * All code written since the fork of torsmo is licensed under the GPL
   9  *
  10  * Please see COPYING for details
  11  *
  12  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
  13  * Copyright (c) 2007 Toni Spets
  14  * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
  15  *      (see AUTHORS)
  16  * All rights reserved.
  17  *
  18  * This program is free software: you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation, either version 3 of the License, or
  21  * (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  29  *
  30  */
  31
  32 #include "conky.h"
  33 #include "logging.h"
  34 #include "common.h"
  35 #include "linux.h"
  36 #include "net_stat.h"
  37 #include "diskio.h"
  38 #include "temphelper.h"
  39 #include <dirent.h>
  40 #include <ctype.h>
  41 #include <errno.h>
  42 #include <limits.h>
  43 #include <sys/types.h>
  44 #include <sys/sysinfo.h>
  45 #include <sys/stat.h>
  46 #ifndef HAVE_CLOCK_GETTIME
  47 #include <sys/time.h>
  48 #endif
  49 #include <fcntl.h>
  50 #include <unistd.h>
  51 // #include <assert.h>
  52 #include <time.h>
  53 #include "top.h"
  54
  55 #include <sys/ioctl.h>
  56 #include <sys/socket.h>
  57 #include <netinet/in.h>
  58 #include <linux/sockios.h>
  59 #include <net/if.h>
  60 #include <arpa/inet.h>
  61 #ifdef _NET_IF_H
  62 #define _LINUX_IF_H
  63 #endif
  64 #include <linux/route.h>
  65 #include <math.h>
  66
  67 /* The following ifdefs were adapted from gkrellm */
  68 #include <linux/major.h>
  69
  70 #if !defined(MD_MAJOR)
  71 #define MD_MAJOR 9
  72 #endif
  73
  74 #if !defined(LVM_BLK_MAJOR)
  75 #define LVM_BLK_MAJOR 58
  76 #endif
  77
  78 #if !defined(NBD_MAJOR)
  79 #define NBD_MAJOR 43
  80 #endif
  81
  82 #ifdef HAVE_IWLIB
  83 #include <iwlib.h>
  84 #endif
  85
  86 struct sysfs {
  87         int fd;
  88         int arg;
  89         char devtype[256];
  90         char type[64];
  91         float factor, offset;
  92 };
  93
  94 #define SHORTSTAT_TEMPL "%*s %llu %llu %llu"
  95 #define LONGSTAT_TEMPL "%*s %llu %llu %llu "
  96
  97 /* This flag tells the linux routines to use the /proc system where possible,
  98  * even if other api's are available, e.g. sysinfo() or getloadavg().
  99  * the reason for this is to allow for /proc-based distributed monitoring.
 100  * using a flag in this manner creates less confusing code. */
 101 static int prefer_proc = 0;
 102
 103 void prepare_update(void)
 104 {
 105 }
 106
 107 void update_uptime(void)
 108 {
 109 #ifdef HAVE_SYSINFO
 110         if (!prefer_proc) {
 111                 struct sysinfo s_info;
 112
 113                 sysinfo(&s_info);
 114                 info.uptime = (double) s_info.uptime;
 115         } else
 116 #endif
 117         {
 118                 static int rep = 0;
 119                 FILE *fp;
 120
 121                 if (!(fp = open_file("/proc/uptime", &rep))) {
 122                         info.uptime = 0.0;
 123                         return;
 124                 }
 125                 fscanf(fp, "%lf", &info.uptime);
 126                 fclose(fp);
 127         }
 128 }
 129
 130 int check_mount(char *s)
 131 {
 132         int ret = 0;
 133         FILE *mtab = fopen("/etc/mtab", "r");
 134
 135         if (mtab) {
 136                 char buf1[256], buf2[128];
 137
 138                 while (fgets(buf1, 256, mtab)) {
 139                         sscanf(buf1, "%*s %128s", buf2);
 140                         if (!strcmp(s, buf2)) {
 141                                 ret = 1;
 142                                 break;
 143                         }
 144                 }
 145                 fclose(mtab);
 146         } else {
 147                 NORM_ERR("Could not open mtab");
 148         }
 149         return ret;
 150 }
 151
 152 /* these things are also in sysinfo except Buffers:
 153  * (that's why I'm reading them from proc) */
 154
 155 void update_meminfo(void)
 156 {
 157         FILE *meminfo_fp;
 158         static int rep = 0;
 159
 160         /* unsigned int a; */
 161         char buf[256];
 162
 163         info.mem = info.memmax = info.swap = info.swapfree = info.swapmax = info.bufmem =
 164                 info.buffers = info.cached = info.memfree = info.memeasyfree = 0;
 165
 166         if (!(meminfo_fp = open_file("/proc/meminfo", &rep))) {
 167                 return;
 168         }
 169
 170         while (!feof(meminfo_fp)) {
 171                 if (fgets(buf, 255, meminfo_fp) == NULL) {
 172                         break;
 173                 }
 174
 175                 if (strncmp(buf, "MemTotal:", 9) == 0) {
 176                         sscanf(buf, "%*s %llu", &info.memmax);
 177                 } else if (strncmp(buf, "MemFree:", 8) == 0) {
 178                         sscanf(buf, "%*s %llu", &info.memfree);
 179                 } else if (strncmp(buf, "SwapTotal:", 10) == 0) {
 180                         sscanf(buf, "%*s %llu", &info.swapmax);
 181                 } else if (strncmp(buf, "SwapFree:", 9) == 0) {
 182                         sscanf(buf, "%*s %llu", &info.swapfree);
 183                 } else if (strncmp(buf, "Buffers:", 8) == 0) {
 184                         sscanf(buf, "%*s %llu", &info.buffers);
 185                 } else if (strncmp(buf, "Cached:", 7) == 0) {
 186                         sscanf(buf, "%*s %llu", &info.cached);
 187                 }
 188         }
 189
 190         info.mem = info.memmax - info.memfree;
 191         info.memeasyfree = info.memfree;
 192         info.swap = info.swapmax - info.swapfree;
 193
 194         info.bufmem = info.cached + info.buffers;
 195
 196         fclose(meminfo_fp);
 197 }
 198
 199 int get_laptop_mode(void)
 200 {
 201         FILE *fp;
 202         int val = -1;
 203
 204         if ((fp = fopen("/proc/sys/vm/laptop_mode", "r")) != NULL)
 205                 fscanf(fp, "%d\n", &val);
 206         fclose(fp);
 207         return val;
 208 }
 209
 210 /* my system says:
 211  * # cat /sys/block/sda/queue/scheduler
 212  * noop [anticipatory] cfq
 213  */
 214 char *get_ioscheduler(char *disk)
 215 {
 216         FILE *fp;
 217         char buf[128];
 218
 219         if (!disk)
 220                 return strndup("n/a", text_buffer_size);
 221
 222         snprintf(buf, 127, "/sys/block/%s/queue/scheduler", disk);
 223         if ((fp = fopen(buf, "r")) == NULL) {
 224                 return strndup("n/a", text_buffer_size);
 225         }
 226         while (!feof(fp)) {
 227                 fscanf(fp, "%127s", buf);
 228                 if (buf[0] == '[') {
 229                         buf[strlen(buf) - 1] = '\0';
 230                         fclose(fp);
 231                         return strndup(buf + 1, text_buffer_size);
 232                 }
 233         }
 234         fclose(fp);
 235         return strndup("n/a", text_buffer_size);
 236 }
 237
 238 static struct {
 239         char *iface;
 240         char *ip;
 241         int count;
 242 } gw_info;
 243
 244 #define COND_FREE(x) if(x) free(x); x = 0
 245 #define SAVE_SET_STRING(x, y) \
 246         if (x && strcmp((char *)x, (char *)y)) { \
 247                 free(x); \
 248                 x = strndup("multiple", text_buffer_size); \
 249         } else if (!x) { \
 250                 x = strndup(y, text_buffer_size); \
 251         }
 252
 253 void update_gateway_info_failure(const char *reason)
 254 {
 255         if(reason != NULL) {
 256                 perror(reason);
 257         }
 258         //2 pointers to 1 location causes a crash when we try to free them both
 259         gw_info.iface = strndup("failed", text_buffer_size);
 260         gw_info.ip = strndup("failed", text_buffer_size);
 261 }
 262
 263
 264 /* Iface Destination Gateway Flags RefCnt Use Metric Mask MTU Window IRTT */
 265 #define RT_ENTRY_FORMAT "%63s %lx %lx %x %*d %*d %*d %lx %*d %*d %*d\n"
 266
 267 void update_gateway_info(void)
 268 {
 269         FILE *fp;
 270         struct in_addr ina;
 271         char iface[64];
 272         unsigned long dest, gate, mask;
 273         unsigned int flags;
 274
 275         COND_FREE(gw_info.iface);
 276         COND_FREE(gw_info.ip);
 277         gw_info.count = 0;
 278
 279         if ((fp = fopen("/proc/net/route", "r")) == NULL) {
 280                 update_gateway_info_failure("fopen()");
 281                 return;
 282         }
 283
 284         /* skip over the table header line, which is always present */
 285         fscanf(fp, "%*[^\n]\n");
 286
 287         while (!feof(fp)) {
 288                 if(fscanf(fp, RT_ENTRY_FORMAT,
 289                           iface, &dest, &gate, &flags, &mask) != 5) {
 290                         update_gateway_info_failure("fscanf()");
 291                         break;
 292                 }
 293                 if (!(dest || mask) && ((flags & RTF_GATEWAY) || !gate) ) {
 294                         gw_info.count++;
 295                         SAVE_SET_STRING(gw_info.iface, iface)
 296                         ina.s_addr = gate;
 297                         SAVE_SET_STRING(gw_info.ip, inet_ntoa(ina))
 298                 }
 299         }
 300         fclose(fp);
 301         return;
 302 }
 303
 304 void free_gateway_info(void)
 305 {
 306         if (gw_info.iface)
 307                 free(gw_info.iface);
 308         if (gw_info.ip)
 309                 free(gw_info.ip);
 310         memset(&gw_info, 0, sizeof(gw_info));
 311 }
 312
 313 int gateway_exists(void)
 314 {
 315         return !!gw_info.count;
 316 }
 317
 318 void print_gateway_iface(char *p, int p_max_size)
 319 {
 320         snprintf(p, p_max_size, "%s", gw_info.iface);
 321 }
 322
 323 void print_gateway_ip(char *p, int p_max_size)
 324 {
 325         snprintf(p, p_max_size, "%s", gw_info.ip);
 326 }
 327
 328 void update_net_stats(void)
 329 {
 330         FILE *net_dev_fp;
 331         static int rep = 0;
 332         static char first = 1;
 333
 334         // FIXME: arbitrary size chosen to keep code simple.
 335         int i, i2;
 336         unsigned int curtmp1, curtmp2;
 337         unsigned int k;
 338         struct ifconf conf;
 339         char buf[256];
 340         double delta;
 341
 342 #ifdef HAVE_IWLIB
 343         // wireless info variables
 344         int skfd, has_bitrate = 0;
 345         struct wireless_info *winfo;
 346         struct iwreq wrq;
 347 #endif
 348
 349         /* get delta */
 350         delta = current_update_time - last_update_time;
 351         if (delta <= 0.0001) {
 352                 return;
 353         }
 354
 355         /* open file and ignore first two lines */
 356         if (!(net_dev_fp = open_file("/proc/net/dev", &rep))) {
 357                 clear_net_stats();
 358                 return;
 359         }
 360
 361         fgets(buf, 255, net_dev_fp);    /* garbage */
 362         fgets(buf, 255, net_dev_fp);    /* garbage (field names) */
 363
 364         /* read each interface */
 365         for (i2 = 0; i2 < MAX_NET_INTERFACES; i2++) {
 366                 struct net_stat *ns;
 367                 char *s, *p;
 368                 char temp_addr[18];
 369                 long long r, t, last_recv, last_trans;
 370
 371                 if (fgets(buf, 255, net_dev_fp) == NULL) {
 372                         break;
 373                 }
 374                 p = buf;
 375                 while (isspace((int) *p)) {
 376                         p++;
 377                 }
 378
 379                 s = p;
 380
 381                 while (*p && *p != ':') {
 382                         p++;
 383                 }
 384                 if (*p == '\0') {
 385                         continue;
 386                 }
 387                 *p = '\0';
 388                 p++;
 389
 390                 ns = get_net_stat(s, NULL, NULL);
 391                 ns->up = 1;
 392                 memset(&(ns->addr.sa_data), 0, 14);
 393
 394                 memset(ns->addrs, 0, 17 * MAX_NET_INTERFACES + 1); /* Up to 17 chars per ip, max MAX_NET_INTERFACES interfaces. Nasty memory usage... */
 395
 396                 last_recv = ns->recv;
 397                 last_trans = ns->trans;
 398
 399                 /* bytes packets errs drop fifo frame compressed multicast|bytes ... */
 400                 sscanf(p, "%lld  %*d     %*d  %*d  %*d  %*d   %*d        %*d       %lld",
 401                         &r, &t);
 402
 403                 /* if recv or trans is less than last time, an overflow happened */
 404                 if (r < ns->last_read_recv) {
 405                         last_recv = 0;
 406                 } else {
 407                         ns->recv += (r - ns->last_read_recv);
 408                 }
 409                 ns->last_read_recv = r;
 410
 411                 if (t < ns->last_read_trans) {
 412                         last_trans = 0;
 413                 } else {
 414                         ns->trans += (t - ns->last_read_trans);
 415                 }
 416                 ns->last_read_trans = t;
 417
 418                 /*** ip addr patch ***/
 419                 i = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
 420
 421                 conf.ifc_buf = malloc(sizeof(struct ifreq) * MAX_NET_INTERFACES);
 422                 conf.ifc_len = sizeof(struct ifreq) * MAX_NET_INTERFACES;
 423                 memset(conf.ifc_buf, 0, conf.ifc_len);
 424
 425                 ioctl((long) i, SIOCGIFCONF, &conf);
 426
 427                 for (k = 0; k < conf.ifc_len / sizeof(struct ifreq); k++) {
 428                         struct net_stat *ns2;
 429
 430                         if (!(((struct ifreq *) conf.ifc_buf) + k))
 431                                 break;
 432
 433                         ns2 = get_net_stat(
 434                                         ((struct ifreq *) conf.ifc_buf)[k].ifr_ifrn.ifrn_name, NULL, NULL);
 435                         ns2->addr = ((struct ifreq *) conf.ifc_buf)[k].ifr_ifru.ifru_addr;
 436                         sprintf(temp_addr, "%u.%u.%u.%u, ",
 437                                         ns2->addr.sa_data[2] & 255,
 438                                         ns2->addr.sa_data[3] & 255,
 439                                         ns2->addr.sa_data[4] & 255,
 440                                         ns2->addr.sa_data[5] & 255);
 441                         if(NULL == strstr(ns2->addrs, temp_addr))
 442                                 strncpy(ns2->addrs + strlen(ns2->addrs), temp_addr, 17);
 443                 }
 444
 445                 close((long) i);
 446
 447                 free(conf.ifc_buf);
 448
 449                 /*** end ip addr patch ***/
 450
 451                 if (!first) {
 452                         /* calculate speeds */
 453                         ns->net_rec[0] = (ns->recv - last_recv) / delta;
 454                         ns->net_trans[0] = (ns->trans - last_trans) / delta;
 455                 }
 456
 457                 curtmp1 = 0;
 458                 curtmp2 = 0;
 459                 // get an average
 460 #ifdef HAVE_OPENMP
 461 #pragma omp parallel for reduction(+:curtmp1, curtmp2) schedule(dynamic,10)
 462 #endif /* HAVE_OPENMP */
 463                 for (i = 0; i < info.net_avg_samples; i++) {
 464                         curtmp1 = curtmp1 + ns->net_rec[i];
 465                         curtmp2 = curtmp2 + ns->net_trans[i];
 466                 }
 467                 if (curtmp1 == 0) {
 468                         curtmp1 = 1;
 469                 }
 470                 if (curtmp2 == 0) {
 471                         curtmp2 = 1;
 472                 }
 473                 ns->recv_speed = curtmp1 / (double) info.net_avg_samples;
 474                 ns->trans_speed = curtmp2 / (double) info.net_avg_samples;
 475                 if (info.net_avg_samples > 1) {
 476 #ifdef HAVE_OPENMP
 477 #pragma omp parallel for schedule(dynamic,10)
 478 #endif /* HAVE_OPENMP */
 479                         for (i = info.net_avg_samples; i > 1; i--) {
 480                                 ns->net_rec[i - 1] = ns->net_rec[i - 2];
 481                                 ns->net_trans[i - 1] = ns->net_trans[i - 2];
 482                         }
 483                 }
 484
 485 #ifdef HAVE_IWLIB
 486                 /* update wireless info */
 487                 winfo = malloc(sizeof(struct wireless_info));
 488                 memset(winfo, 0, sizeof(struct wireless_info));
 489
 490                 skfd = iw_sockets_open();
 491                 if (iw_get_basic_config(skfd, s, &(winfo->b)) > -1) {
 492
 493                         // set present winfo variables
 494                         if (iw_get_stats(skfd, s, &(winfo->stats),
 495                                         &winfo->range, winfo->has_range) >= 0) {
 496                                 winfo->has_stats = 1;
 497                         }
 498                         if (iw_get_range_info(skfd, s, &(winfo->range)) >= 0) {
 499                                 winfo->has_range = 1;
 500                         }
 501                         if (iw_get_ext(skfd, s, SIOCGIWAP, &wrq) >= 0) {
 502                                 winfo->has_ap_addr = 1;
 503                                 memcpy(&(winfo->ap_addr), &(wrq.u.ap_addr), sizeof(sockaddr));
 504                         }
 505
 506                         // get bitrate
 507                         if (iw_get_ext(skfd, s, SIOCGIWRATE, &wrq) >= 0) {
 508                                 memcpy(&(winfo->bitrate), &(wrq.u.bitrate), sizeof(iwparam));
 509                                 iw_print_bitrate(ns->bitrate, 16, winfo->bitrate.value);
 510                                 has_bitrate = 1;
 511                         }
 512
 513                         // get link quality
 514                         if (winfo->has_range && winfo->has_stats
 515                                         && ((winfo->stats.qual.level != 0)
 516                                         || (winfo->stats.qual.updated & IW_QUAL_DBM))) {
 517                                 if (!(winfo->stats.qual.updated & IW_QUAL_QUAL_INVALID)) {
 518                                         ns->link_qual = winfo->stats.qual.qual;
 519                                         ns->link_qual_max = winfo->range.max_qual.qual;
 520                                 }
 521                         }
 522
 523                         // get ap mac
 524                         if (winfo->has_ap_addr) {
 525                                 iw_sawap_ntop(&winfo->ap_addr, ns->ap);
 526                         }
 527
 528                         // get essid
 529                         if (winfo->b.has_essid) {
 530                                 if (winfo->b.essid_on) {
 531                                         snprintf(ns->essid, 32, "%s", winfo->b.essid);
 532                                 } else {
 533                                         snprintf(ns->essid, 32, "off/any");
 534                                 }
 535                         }
 536
 537                         snprintf(ns->mode, 16, "%s", iw_operation_mode[winfo->b.mode]);
 538                 }
 539                 iw_sockets_close(skfd);
 540                 free(winfo);
 541 #endif
 542         }
 543         first = 0;
 544
 545         fclose(net_dev_fp);
 546 }
 547
 548 int result;
 549
 550 void update_total_processes(void)
 551 {
 552         DIR *dir;
 553         struct dirent *entry;
 554         int ignore1;
 555         char ignore2;
 556
 557         info.procs = 0;
 558         if (!(dir = opendir("/proc"))) {
 559                 return;
 560         }
 561         while ((entry = readdir(dir))) {
 562                 if (!entry) {
 563                         /* Problem reading list of processes */
 564                         closedir(dir);
 565                         info.procs = 0;
 566                         return;
 567                 }
 568                 if (sscanf(entry->d_name, "%d%c", &ignore1, &ignore2) == 1) {
 569                         info.procs++;
 570                 }
 571         }
 572         closedir(dir);
 573 }
 574
 575 void update_threads(void)
 576 {
 577 #ifdef HAVE_SYSINFO
 578         if (!prefer_proc) {
 579                 struct sysinfo s_info;
 580
 581                 sysinfo(&s_info);
 582                 info.threads = s_info.procs;
 583         } else
 584 #endif
 585         {
 586                 static int rep = 0;
 587                 FILE *fp;
 588
 589                 if (!(fp = open_file("/proc/loadavg", &rep))) {
 590                         info.threads = 0;
 591                         return;
 592                 }
 593                 fscanf(fp, "%*f %*f %*f %*d/%hu", &info.threads);
 594                 fclose(fp);
 595         }
 596 }
 597
 598 #define CPU_SAMPLE_COUNT 15
 599 struct cpu_info {
 600         unsigned long long cpu_user;
 601         unsigned long long cpu_system;
 602         unsigned long long cpu_nice;
 603         unsigned long long cpu_idle;
 604         unsigned long long cpu_iowait;
 605         unsigned long long cpu_irq;
 606         unsigned long long cpu_softirq;
 607         unsigned long long cpu_steal;
 608         unsigned long long cpu_total;
 609         unsigned long long cpu_active_total;
 610         unsigned long long cpu_last_total;
 611         unsigned long long cpu_last_active_total;
 612         double cpu_val[CPU_SAMPLE_COUNT];
 613 };
 614 static short cpu_setup = 0;
 615
 616 /* Determine if this kernel gives us "extended" statistics information in
 617  * /proc/stat.
 618  * Kernels around 2.5 and earlier only reported user, system, nice, and
 619  * idle values in proc stat.
 620  * Kernels around 2.6 and greater report these PLUS iowait, irq, softirq,
 621  * and steal */
 622 void determine_longstat(char *buf)
 623 {
 624         unsigned long long iowait = 0;
 625
 626         KFLAG_SETOFF(KFLAG_IS_LONGSTAT);
 627         /* scanf will either return -1 or 1 because there is only 1 assignment */
 628         if (sscanf(buf, "%*s %*d %*d %*d %*d %llu", &iowait) > 0) {
 629                 KFLAG_SETON(KFLAG_IS_LONGSTAT);
 630         }
 631 }
 632
 633 void get_cpu_count(void)
 634 {
 635         FILE *stat_fp;
 636         static int rep = 0;
 637         char buf[256];
 638
 639         if (info.cpu_usage) {
 640                 return;
 641         }
 642
 643         if (!(stat_fp = open_file("/proc/stat", &rep))) {
 644                 return;
 645         }
 646
 647         info.cpu_count = 0;
 648
 649         while (!feof(stat_fp)) {
 650                 if (fgets(buf, 255, stat_fp) == NULL) {
 651                         break;
 652                 }
 653
 654                 if (strncmp(buf, "cpu", 3) == 0 && isdigit(buf[3])) {
 655                         if (info.cpu_count == 0) {
 656                                 determine_longstat(buf);
 657                         }
 658                         info.cpu_count++;
 659                 }
 660         }
 661         info.cpu_usage = malloc((info.cpu_count + 1) * sizeof(float));
 662
 663         fclose(stat_fp);
 664 }
 665
 666 #define TMPL_LONGSTAT "%*s %llu %llu %llu %llu %llu %llu %llu %llu"
 667 #define TMPL_SHORTSTAT "%*s %llu %llu %llu %llu"
 668
 669 inline static void update_stat(void)
 670 {
 671         FILE *stat_fp;
 672         static int rep = 0;
 673         static struct cpu_info *cpu = NULL;
 674         char buf[256];
 675         int i;
 676         unsigned int idx;
 677         double curtmp;
 678         const char *stat_template = NULL;
 679         unsigned int malloc_cpu_size = 0;
 680         extern void* global_cpu;
 681         static double last_stat_update = 0.0;
 682
 683         /* since we use wrappers for this function, the update machinery
 684          * can't eliminate double invocations of this function. Check for
 685          * them here, otherwise cpu_usage counters are freaking out. */
 686         if (last_stat_update == current_update_time)
 687                 return;
 688         last_stat_update = current_update_time;
 689
 690         /* add check for !info.cpu_usage since that mem is freed on a SIGUSR1 */
 691         if (!cpu_setup || !info.cpu_usage) {
 692                 get_cpu_count();
 693                 cpu_setup = 1;
 694         }
 695
 696         if (!stat_template) {
 697                 stat_template =
 698                         KFLAG_ISSET(KFLAG_IS_LONGSTAT) ? TMPL_LONGSTAT : TMPL_SHORTSTAT;
 699         }
 700
 701         if (!global_cpu) {
 702                 malloc_cpu_size = (info.cpu_count + 1) * sizeof(struct cpu_info);
 703                 cpu = malloc(malloc_cpu_size);
 704                 memset(cpu, 0, malloc_cpu_size);
 705                 global_cpu = cpu;
 706         }
 707
 708         if (!(stat_fp = open_file("/proc/stat", &rep))) {
 709                 info.run_procs = 0;
 710                 if (info.cpu_usage) {
 711                         memset(info.cpu_usage, 0, info.cpu_count * sizeof(float));
 712                 }
 713                 return;
 714         }
 715
 716         idx = 0;
 717         while (!feof(stat_fp)) {
 718                 if (fgets(buf, 255, stat_fp) == NULL) {
 719                         break;
 720                 }
 721
 722                 if (strncmp(buf, "procs_running ", 14) == 0) {
 723                         sscanf(buf, "%*s %hu", &info.run_procs);
 724                 } else if (strncmp(buf, "cpu", 3) == 0) {
 725                         double delta;
 726                         if (isdigit(buf[3])) {
 727                                 idx = atoi(&buf[3]) + 1;
 728                         } else {
 729                                 idx = 0;
 730                         }
 731                         sscanf(buf, stat_template, &(cpu[idx].cpu_user),
 732                                 &(cpu[idx].cpu_nice), &(cpu[idx].cpu_system),
 733                                 &(cpu[idx].cpu_idle), &(cpu[idx].cpu_iowait),
 734                                 &(cpu[idx].cpu_irq), &(cpu[idx].cpu_softirq),
 735                                 &(cpu[idx].cpu_steal));
 736
 737                         cpu[idx].cpu_total = cpu[idx].cpu_user + cpu[idx].cpu_nice +
 738                                 cpu[idx].cpu_system + cpu[idx].cpu_idle +
 739                                 cpu[idx].cpu_iowait + cpu[idx].cpu_irq +
 740                                 cpu[idx].cpu_softirq + cpu[idx].cpu_steal;
 741
 742                         cpu[idx].cpu_active_total = cpu[idx].cpu_total -
 743                                 (cpu[idx].cpu_idle + cpu[idx].cpu_iowait);
 744
 745                         delta = current_update_time - last_update_time;
 746
 747                         if (delta <= 0.001) {
 748                                 break;
 749                         }
 750
 751                         cpu[idx].cpu_val[0] = (cpu[idx].cpu_active_total -
 752                                 cpu[idx].cpu_last_active_total) /
 753                                 (float) (cpu[idx].cpu_total - cpu[idx].cpu_last_total);
 754                         curtmp = 0;
 755 #ifdef HAVE_OPENMP
 756 #pragma omp parallel for reduction(+:curtmp) schedule(dynamic,10)
 757 #endif /* HAVE_OPENMP */
 758                         for (i = 0; i < info.cpu_avg_samples; i++) {
 759                                 curtmp = curtmp + cpu[idx].cpu_val[i];
 760                         }
 761                         /* TESTING -- I've removed this, because I don't think it is right.
 762                          * You shouldn't divide by the cpu count here ...
 763                          * removing for testing */
 764                         /* if (idx == 0) {
 765                                 info.cpu_usage[idx] = curtmp / info.cpu_avg_samples /
 766                                         info.cpu_count;
 767                         } else {
 768                                 info.cpu_usage[idx] = curtmp / info.cpu_avg_samples;
 769                         } */
 770                         /* TESTING -- this line replaces the prev. "suspect" if/else */
 771                         info.cpu_usage[idx] = curtmp / info.cpu_avg_samples;
 772
 773                         cpu[idx].cpu_last_total = cpu[idx].cpu_total;
 774                         cpu[idx].cpu_last_active_total = cpu[idx].cpu_active_total;
 775 #ifdef HAVE_OPENMP
 776 #pragma omp parallel for schedule(dynamic,10)
 777 #endif /* HAVE_OPENMP */
 778                         for (i = info.cpu_avg_samples - 1; i > 0; i--) {
 779                                 cpu[idx].cpu_val[i] = cpu[idx].cpu_val[i - 1];
 780                         }
 781                 }
 782         }
 783         fclose(stat_fp);
 784 }
 785
 786 void update_running_processes(void)
 787 {
 788         update_stat();
 789 }
 790
 791 void update_cpu_usage(void)
 792 {
 793         update_stat();
 794 }
 795
 796 void update_load_average(void)
 797 {
 798 #ifdef HAVE_GETLOADAVG
 799         if (!prefer_proc) {
 800                 double v[3];
 801
 802                 getloadavg(v, 3);
 803                 info.loadavg[0] = (float) v[0];
 804                 info.loadavg[1] = (float) v[1];
 805                 info.loadavg[2] = (float) v[2];
 806         } else
 807 #endif
 808         {
 809                 static int rep = 0;
 810                 FILE *fp;
 811
 812                 if (!(fp = open_file("/proc/loadavg", &rep))) {
 813                         info.loadavg[0] = info.loadavg[1] = info.loadavg[2] = 0.0;
 814                         return;
 815                 }
 816                 fscanf(fp, "%f %f %f", &info.loadavg[0], &info.loadavg[1],
 817                         &info.loadavg[2]);
 818                 fclose(fp);
 819         }
 820 }
 821
 822 #define PROC_I8K "/proc/i8k"
 823 #define I8K_DELIM " "
 824 static char *i8k_procbuf = NULL;
 825 void update_i8k(void)
 826 {
 827         FILE *fp;
 828
 829         if (!i8k_procbuf) {
 830                 i8k_procbuf = (char *) malloc(128 * sizeof(char));
 831         }
 832         if ((fp = fopen(PROC_I8K, "r")) == NULL) {
 833                 CRIT_ERR(NULL, NULL, "/proc/i8k doesn't exist! use insmod to make sure the kernel "
 834                         "driver is loaded...");
 835         }
 836
 837         memset(&i8k_procbuf[0], 0, 128);
 838         if (fread(&i8k_procbuf[0], sizeof(char), 128, fp) == 0) {
 839                 NORM_ERR("something wrong with /proc/i8k...");
 840         }
 841
 842         fclose(fp);
 843
 844         i8k.version = strtok(&i8k_procbuf[0], I8K_DELIM);
 845         i8k.bios = strtok(NULL, I8K_DELIM);
 846         i8k.serial = strtok(NULL, I8K_DELIM);
 847         i8k.cpu_temp = strtok(NULL, I8K_DELIM);
 848         i8k.left_fan_status = strtok(NULL, I8K_DELIM);
 849         i8k.right_fan_status = strtok(NULL, I8K_DELIM);
 850         i8k.left_fan_rpm = strtok(NULL, I8K_DELIM);
 851         i8k.right_fan_rpm = strtok(NULL, I8K_DELIM);
 852         i8k.ac_status = strtok(NULL, I8K_DELIM);
 853         i8k.buttons_status = strtok(NULL, I8K_DELIM);
 854 }
 855
 856 /***********************************************************/
 857 /***********************************************************/
 858 /***********************************************************/
 859
 860 static int no_dots(const struct dirent *d)
 861 {
 862         if (d->d_name[0] == '.') {
 863                 return 0;
 864         }
 865         return 1;
 866 }
 867
 868 static int get_first_file_in_a_directory(const char *dir, char *s, int *rep)
 869 {
 870         struct dirent **namelist;
 871         int i, n;
 872
 873         n = scandir(dir, &namelist, no_dots, alphasort);
 874         if (n < 0) {
 875                 if (!rep || !*rep) {
 876                         NORM_ERR("scandir for %s: %s", dir, strerror(errno));
 877                         if (rep) {
 878                                 *rep = 1;
 879                         }
 880                 }
 881                 return 0;
 882         } else {
 883                 if (n == 0) {
 884                         return 0;
 885                 }
 886
 887                 strncpy(s, namelist[0]->d_name, 255);
 888                 s[255] = '\0';
 889
 890 #ifdef HAVE_OPENMP
 891 #pragma omp parallel for schedule(dynamic,10)
 892 #endif /* HAVE_OPENMP */
 893                 for (i = 0; i < n; i++) {
 894                         free(namelist[i]);
 895                 }
 896                 free(namelist);
 897
 898                 return 1;
 899         }
 900 }
 901
 902 static int open_sysfs_sensor(const char *dir, const char *dev, const char *type, int n,
 903                 int *divisor, char *devtype)
 904 {
 905         char path[256];
 906         char buf[256];
 907         int fd;
 908         int divfd;
 909
 910         memset(buf, 0, sizeof(buf));
 911
 912         /* if device is NULL or *, get first */
 913         if (dev == NULL || strcmp(dev, "*") == 0) {
 914                 static int rep = 0;
 915
 916                 if (!get_first_file_in_a_directory(dir, buf, &rep)) {
 917                         return -1;
 918                 }
 919                 dev = buf;
 920         }
 921
 922         if (strcmp(dir, "/sys/class/hwmon/") == 0) {
 923                 if (*buf) {
 924                         /* buf holds result from get_first_file_in_a_directory() above,
 925                          * e.g. "hwmon0" -- append "/device" */
 926                         strcat(buf, "/device");
 927                 } else {
 928                         /* dev holds device number N as a string,
 929                          * e.g. "0", -- convert to "hwmon0/device" */
 930                         sprintf(buf, "hwmon%s/device", dev);
 931                         dev = buf;
 932                 }
 933         }
 934
 935         /* change vol to in, tempf to temp */
 936         if (strcmp(type, "vol") == 0) {
 937                 type = "in";
 938         } else if (strcmp(type, "tempf") == 0) {
 939                 type = "temp";
 940         }
 941
 942         /* construct path */
 943         snprintf(path, 255, "%s%s/%s%d_input", dir, dev, type, n);
 944
 945         /* first, attempt to open file in /device */
 946         fd = open(path, O_RDONLY);
 947         if (fd < 0) {
 948
 949                 /* if it fails, strip the /device from dev and attempt again */
 950                 buf[strlen(buf) - 7] = 0;
 951                 snprintf(path, 255, "%s%s/%s%d_input", dir, dev, type, n);
 952                 fd = open(path, O_RDONLY);
 953                 if (fd < 0) {
 954                         CRIT_ERR(NULL, NULL, "can't open '%s': %s\nplease check your device or remove this "
 955                                          "var from "PACKAGE_NAME, path, strerror(errno));
 956                 }
 957         }
 958
 959         strncpy(devtype, path, 255);
 960
 961         if (strcmp(type, "in") == 0 || strcmp(type, "temp") == 0
 962                         || strcmp(type, "tempf") == 0) {
 963                 *divisor = 1;
 964         } else {
 965                 *divisor = 0;
 966         }
 967         /* fan does not use *_div as a read divisor */
 968         if (strcmp("fan", type) == 0) {
 969                 return fd;
 970         }
 971
 972         /* test if *_div file exist, open it and use it as divisor */
 973         if (strcmp(type, "tempf") == 0) {
 974                 snprintf(path, 255, "%s%s/%s%d_div", dir, "one", "two", n);
 975         } else {
 976                 snprintf(path, 255, "%s%s/%s%d_div", dir, dev, type, n);
 977         }
 978
 979         divfd = open(path, O_RDONLY);
 980         if (divfd > 0) {
 981                 /* read integer */
 982                 char divbuf[64];
 983                 int divn;
 984
 985                 divn = read(divfd, divbuf, 63);
 986                 /* should read until n == 0 but I doubt that kernel will give these
 987                  * in multiple pieces. :) */
 988                 if (divn < 0) {
 989                         NORM_ERR("open_sysfs_sensor(): can't read from sysfs");
 990                 } else {
 991                         divbuf[divn] = '\0';
 992                         *divisor = atoi(divbuf);
 993                 }
 994                 close(divfd);
 995         }
 996
 997         return fd;
 998 }
 999
1000 static double get_sysfs_info(int *fd, int divisor, char *devtype, char *type)
1001 {
1002         int val = 0;
1003
1004         if (*fd <= 0) {
1005                 return 0;
1006         }
1007
1008         lseek(*fd, 0, SEEK_SET);
1009
1010         /* read integer */
1011         {
1012                 char buf[64];
1013                 int n;
1014                 n = read(*fd, buf, 63);
1015                 /* should read until n == 0 but I doubt that kernel will give these
1016                  * in multiple pieces. :) */
1017                 if (n < 0) {
1018                         NORM_ERR("get_sysfs_info(): read from %s failed\n", devtype);
1019                 } else {
1020                         buf[n] = '\0';
1021                         val = atoi(buf);
1022                 }
1023         }
1024
1025         close(*fd);
1026         /* open file */
1027         *fd = open(devtype, O_RDONLY);
1028         if (*fd < 0) {
1029                 NORM_ERR("can't open '%s': %s", devtype, strerror(errno));
1030         }
1031
1032         /* My dirty hack for computing CPU value
1033          * Filedil, from forums.gentoo.org */
1034         /* if (strstr(devtype, "temp1_input") != NULL) {
1035                 return -15.096 + 1.4893 * (val / 1000.0);
1036         } */
1037
1038         /* divide voltage and temperature by 1000 */
1039         /* or if any other divisor is given, use that */
1040         if (strcmp(type, "tempf") == 0) {
1041                 if (divisor > 1) {
1042                         return ((val / divisor + 40) * 9.0 / 5) - 40;
1043                 } else if (divisor) {
1044                         return ((val / 1000.0 + 40) * 9.0 / 5) - 40;
1045                 } else {
1046                         return ((val + 40) * 9.0 / 5) - 40;
1047                 }
1048         } else {
1049                 if (divisor > 1) {
1050                         return val / divisor;
1051                 } else if (divisor) {
1052                         return val / 1000.0;
1053                 } else {
1054                         return val;
1055                 }
1056         }
1057 }
1058
1059 #define HWMON_RESET() {\
1060                 buf1[0] = 0; \
1061                 factor = 1.0; \
1062                 offset = 0.0; }
1063
1064 static void parse_sysfs_sensor(struct text_object *obj, const char *arg, const char *path, const char *type)
1065 {
1066         char buf1[64], buf2[64];
1067         float factor, offset;
1068         int n, found = 0;
1069         struct sysfs *sf;
1070
1071         if (sscanf(arg, "%63s %d %f %f", buf2, &n, &factor, &offset) == 4) found = 1; else HWMON_RESET();
1072         if (!found && sscanf(arg, "%63s %63s %d %f %f", buf1, buf2, &n, &factor, &offset) == 5) found = 1; else if (!found) HWMON_RESET();
1073         if (!found && sscanf(arg, "%63s %63s %d", buf1, buf2, &n) == 3) found = 1; else if (!found) HWMON_RESET();
1074         if (!found && sscanf(arg, "%63s %d", buf2, &n) == 2) found = 1; else if (!found) HWMON_RESET();
1075
1076         if (!found) {
1077                 NORM_ERR("i2c failed to parse arguments");
1078                 obj->type = OBJ_text;
1079                 return;
1080         }
1081         DBGP("parsed %s args: '%s' '%s' %d %f %f\n", type, buf1, buf2, n, factor, offset);
1082         sf = malloc(sizeof(struct sysfs));
1083         memset(sf, 0, sizeof(struct sysfs));
1084         sf->fd = open_sysfs_sensor(path, (*buf1) ? buf1 : 0, buf2, n,
1085                         &sf->arg, sf->devtype);
1086         strncpy(sf->type, buf2, 63);
1087         sf->factor = factor;
1088         sf->offset = offset;
1089         obj->data.opaque = sf;
1090 }
1091
1092 #define PARSER_GENERATOR(name, path)                                \
1093 void parse_##name##_sensor(struct text_object *obj, const char *arg) \
1094 {                                                                   \
1095         parse_sysfs_sensor(obj, arg, path, #name);           \
1096 }
1097
1098 PARSER_GENERATOR(i2c, "/sys/bus/i2c/devices/")
1099 PARSER_GENERATOR(hwmon, "/sys/class/hwmon/")
1100 PARSER_GENERATOR(platform, "/sys/bus/platform/devices/")
1101
1102 void print_sysfs_sensor(struct text_object *obj, char *p, int p_max_size)
1103 {
1104         double r;
1105         struct sysfs *sf = obj->data.opaque;
1106
1107         if (!sf)
1108                 return;
1109
1110         r = get_sysfs_info(&sf->fd, sf->arg,
1111                         sf->devtype, sf->type);
1112
1113         r = r * sf->factor + sf->offset;
1114
1115         if (!strncmp(sf->type, "temp", 4)) {
1116                 temp_print(p, p_max_size, r, TEMP_CELSIUS);
1117         } else if (r >= 100.0 || r == 0) {
1118                 snprintf(p, p_max_size, "%d", (int) r);
1119         } else {
1120                 snprintf(p, p_max_size, "%.1f", r);
1121         }
1122 }
1123
1124 void free_sysfs_sensor(struct text_object *obj)
1125 {
1126         struct sysfs *sf = obj->data.opaque;
1127
1128         if (!sf)
1129                 return;
1130
1131         close(sf->fd);
1132         free(obj->data.opaque);
1133         obj->data.opaque = NULL;
1134 }
1135
1136 #define CPUFREQ_PREFIX "/sys/devices/system/cpu"
1137 #define CPUFREQ_POSTFIX "cpufreq/scaling_cur_freq"
1138
1139 /* return system frequency in MHz (use divisor=1) or GHz (use divisor=1000) */
1140 char get_freq(char *p_client_buffer, size_t client_buffer_size,
1141                 const char *p_format, int divisor, unsigned int cpu)
1142 {
1143         FILE *f;
1144         static int rep = 0;
1145         char frequency[32];
1146         char s[256];
1147         double freq = 0;
1148
1149         if (!p_client_buffer || client_buffer_size <= 0 || !p_format
1150                         || divisor <= 0) {
1151                 return 0;
1152         }
1153
1154         if (!prefer_proc) {
1155                 char current_freq_file[128];
1156
1157                 snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu - 1,
1158                         CPUFREQ_POSTFIX);
1159                 f = fopen(current_freq_file, "r");
1160                 if (f) {
1161                         /* if there's a cpufreq /sys node, read the current frequency from
1162                          * this node and divide by 1000 to get Mhz. */
1163                         if (fgets(s, sizeof(s), f)) {
1164                                 s[strlen(s) - 1] = '\0';
1165                                 freq = strtod(s, NULL);
1166                         }
1167                         fclose(f);
1168                         snprintf(p_client_buffer, client_buffer_size, p_format,
1169                                 (freq / 1000) / divisor);
1170                         return 1;
1171                 }
1172         }
1173
1174         // open the CPU information file
1175         f = open_file("/proc/cpuinfo", &rep);
1176         if (!f) {
1177                 perror(PACKAGE_NAME": Failed to access '/proc/cpuinfo' at get_freq()");
1178                 return 0;
1179         }
1180
1181         // read the file
1182         while (fgets(s, sizeof(s), f) != NULL) {
1183
1184 #if defined(__i386) || defined(__x86_64)
1185                 // and search for the cpu mhz
1186                 if (strncmp(s, "cpu MHz", 7) == 0 && cpu == 0) {
1187 #else
1188 #if defined(__alpha)
1189                 // different on alpha
1190                 if (strncmp(s, "cycle frequency [Hz]", 20) == 0 && cpu == 0) {
1191 #else
1192                 // this is different on ppc for some reason
1193                 if (strncmp(s, "clock", 5) == 0 && cpu == 0) {
1194 #endif // defined(__alpha)
1195 #endif // defined(__i386) || defined(__x86_64)
1196
1197                         // copy just the number
1198                         strcpy(frequency, strchr(s, ':') + 2);
1199 #if defined(__alpha)
1200                         // strip " est.\n"
1201                         frequency[strlen(frequency) - 6] = '\0';
1202                         // kernel reports in Hz
1203                         freq = strtod(frequency, NULL) / 1000000;
1204 #else
1205                         // strip \n
1206                         frequency[strlen(frequency) - 1] = '\0';
1207                         freq = strtod(frequency, NULL);
1208 #endif
1209                         break;
1210                 }
1211                 if (strncmp(s, "processor", 9) == 0) {
1212                         cpu--;
1213                         continue;
1214                 }
1215         }
1216
1217         fclose(f);
1218         snprintf(p_client_buffer, client_buffer_size, p_format,
1219                 (float) freq / divisor);
1220         return 1;
1221 }
1222
1223 #define CPUFREQ_VOLTAGE "cpufreq/scaling_voltages"
1224
1225 /* /sys/devices/system/cpu/cpu0/cpufreq/scaling_voltages looks something
1226  * like this:
1227 # frequency voltage
1228 1800000 1340
1229 1600000 1292
1230 1400000 1100
1231 1200000 988
1232 1000000 1116
1233 800000 1004
1234 600000 988
1235  * Peter Tarjan (ptarjan@citromail.hu) */
1236
1237 /* return cpu voltage in mV (use divisor=1) or V (use divisor=1000) */
1238 char get_voltage(char *p_client_buffer, size_t client_buffer_size,
1239                 const char *p_format, int divisor, unsigned int cpu)
1240 {
1241         FILE *f;
1242         char s[256];
1243         int freq = 0;
1244         int voltage = 0;
1245         char current_freq_file[128];
1246         int freq_comp = 0;
1247
1248         /* build the voltage file name */
1249         cpu--;
1250         snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu,
1251                 CPUFREQ_POSTFIX);
1252
1253         if (!p_client_buffer || client_buffer_size <= 0 || !p_format
1254                         || divisor <= 0) {
1255                 return 0;
1256         }
1257
1258         /* read the current cpu frequency from the /sys node */
1259         f = fopen(current_freq_file, "r");
1260         if (f) {
1261                 if (fgets(s, sizeof(s), f)) {
1262                         s[strlen(s) - 1] = '\0';
1263                         freq = strtod(s, NULL);
1264                 }
1265                 fclose(f);
1266         } else {
1267                 fprintf(stderr, PACKAGE_NAME": Failed to access '%s' at ", current_freq_file);
1268                 perror("get_voltage()");
1269                 if (f) {
1270                         fclose(f);
1271                 }
1272                 return 0;
1273         }
1274
1275         snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu,
1276                 CPUFREQ_VOLTAGE);
1277
1278         /* use the current cpu frequency to find the corresponding voltage */
1279         f = fopen(current_freq_file, "r");
1280
1281         if (f) {
1282                 while (!feof(f)) {
1283                         char line[256];
1284
1285                         if (fgets(line, 255, f) == NULL) {
1286                                 break;
1287                         }
1288                         sscanf(line, "%d %d", &freq_comp, &voltage);
1289                         if (freq_comp == freq) {
1290                                 break;
1291                         }
1292                 }
1293                 fclose(f);
1294         } else {
1295                 fprintf(stderr, PACKAGE_NAME": Failed to access '%s' at ", current_freq_file);
1296                 perror("get_voltage()");
1297                 if (f) {
1298                         fclose(f);
1299                 }
1300                 return 0;
1301         }
1302         snprintf(p_client_buffer, client_buffer_size, p_format,
1303                 (float) voltage / divisor);
1304         return 1;
1305 }
1306
1307 #define ACPI_FAN_DIR "/proc/acpi/fan/"
1308
1309 void get_acpi_fan(char *p_client_buffer, size_t client_buffer_size)
1310 {
1311         static int rep = 0;
1312         char buf[256];
1313         char buf2[256];
1314         FILE *fp;
1315
1316         if (!p_client_buffer || client_buffer_size <= 0) {
1317                 return;
1318         }
1319
1320         /* yeah, slow... :/ */
1321         if (!get_first_file_in_a_directory(ACPI_FAN_DIR, buf, &rep)) {
1322                 snprintf(p_client_buffer, client_buffer_size, "no fans?");
1323                 return;
1324         }
1325
1326         snprintf(buf2, sizeof(buf2), "%s%s/state", ACPI_FAN_DIR, buf);
1327
1328         fp = open_file(buf2, &rep);
1329         if (!fp) {
1330                 snprintf(p_client_buffer, client_buffer_size,
1331                         "can't open fan's state file");
1332                 return;
1333         }
1334         memset(buf, 0, sizeof(buf));
1335         fscanf(fp, "%*s %99s", buf);
1336         fclose(fp);
1337
1338         snprintf(p_client_buffer, client_buffer_size, "%s", buf);
1339 }
1340
1341 #define SYSFS_AC_ADAPTER_DIR "/sys/class/power_supply/AC"
1342 #define ACPI_AC_ADAPTER_DIR "/proc/acpi/ac_adapter/"
1343 /* Linux 2.6.25 onwards ac adapter info is in
1344    /sys/class/power_supply/AC/
1345    On my system I get the following.
1346      /sys/class/power_supply/AC/uevent:
1347      PHYSDEVPATH=/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:01/PNP0C09:00/ACPI0003:00
1348      PHYSDEVBUS=acpi
1349      PHYSDEVDRIVER=ac
1350      POWER_SUPPLY_NAME=AC
1351      POWER_SUPPLY_TYPE=Mains
1352      POWER_SUPPLY_ONLINE=1
1353 */
1354
1355 void get_acpi_ac_adapter(char *p_client_buffer, size_t client_buffer_size)
1356 {
1357         static int rep = 0;
1358
1359         char buf[256];
1360         char buf2[256];
1361         FILE *fp;
1362
1363         if (!p_client_buffer || client_buffer_size <= 0) {
1364                 return;
1365         }
1366
1367         snprintf(buf2, sizeof(buf2), "%s/uevent", SYSFS_AC_ADAPTER_DIR);
1368         fp = open_file(buf2, &rep);
1369         if (fp) {
1370                 /* sysfs processing */
1371                 while (!feof(fp)) {
1372                         if (fgets(buf, sizeof(buf), fp) == NULL)
1373                                 break;
1374
1375                         if (strncmp(buf, "POWER_SUPPLY_ONLINE=", 20) == 0) {
1376                                 int online = 0;
1377                                 sscanf(buf, "POWER_SUPPLY_ONLINE=%d", &online);
1378                                 snprintf(p_client_buffer, client_buffer_size,
1379                                          "%s-line", (online ? "on" : "off"));
1380                                 break;
1381                         }
1382                 }
1383                 fclose(fp);
1384         } else {
1385                 /* yeah, slow... :/ */
1386                 if (!get_first_file_in_a_directory(ACPI_AC_ADAPTER_DIR, buf, &rep)) {
1387                         snprintf(p_client_buffer, client_buffer_size, "no ac_adapters?");
1388                         return;
1389                 }
1390
1391                 snprintf(buf2, sizeof(buf2), "%s%s/state", ACPI_AC_ADAPTER_DIR, buf);
1392
1393                 fp = open_file(buf2, &rep);
1394                 if (!fp) {
1395                         snprintf(p_client_buffer, client_buffer_size,
1396                                  "No ac adapter found.... where is it?");
1397                         return;
1398                 }
1399                 memset(buf, 0, sizeof(buf));
1400                 fscanf(fp, "%*s %99s", buf);
1401                 fclose(fp);
1402
1403                 snprintf(p_client_buffer, client_buffer_size, "%s", buf);
1404         }
1405 }
1406
1407 /*
1408 /proc/acpi/thermal_zone/THRM/cooling_mode
1409 cooling mode:            active
1410 /proc/acpi/thermal_zone/THRM/polling_frequency
1411 <polling disabled>
1412 /proc/acpi/thermal_zone/THRM/state
1413 state:                   ok
1414 /proc/acpi/thermal_zone/THRM/temperature
1415 temperature:             45 C
1416 /proc/acpi/thermal_zone/THRM/trip_points
1417 critical (S5):           73 C
1418 passive:                 73 C: tc1=4 tc2=3 tsp=40 devices=0xcdf6e6c0
1419 */
1420
1421 #define ACPI_THERMAL_DIR "/proc/acpi/thermal_zone/"
1422 #define ACPI_THERMAL_FORMAT "/proc/acpi/thermal_zone/%s/temperature"
1423
1424 int open_acpi_temperature(const char *name)
1425 {
1426         char path[256];
1427         char buf[256];
1428         int fd;
1429
1430         if (name == NULL || strcmp(name, "*") == 0) {
1431                 static int rep = 0;
1432
1433                 if (!get_first_file_in_a_directory(ACPI_THERMAL_DIR, buf, &rep)) {
1434                         return -1;
1435                 }
1436                 name = buf;
1437         }
1438
1439         snprintf(path, 255, ACPI_THERMAL_FORMAT, name);
1440
1441         fd = open(path, O_RDONLY);
1442         if (fd < 0) {
1443                 NORM_ERR("can't open '%s': %s", path, strerror(errno));
1444         }
1445
1446         return fd;
1447 }
1448
1449 static double last_acpi_temp;
1450 static double last_acpi_temp_time;
1451
1452 double get_acpi_temperature(int fd)
1453 {
1454         if (fd <= 0) {
1455                 return 0;
1456         }
1457
1458         /* don't update acpi temperature too often */
1459         if (current_update_time - last_acpi_temp_time < 11.32) {
1460                 return last_acpi_temp;
1461         }
1462         last_acpi_temp_time = current_update_time;
1463
1464         /* seek to beginning */
1465         lseek(fd, 0, SEEK_SET);
1466
1467         /* read */
1468         {
1469                 char buf[256];
1470                 int n;
1471
1472                 n = read(fd, buf, 255);
1473                 if (n < 0) {
1474                         NORM_ERR("can't read fd %d: %s", fd, strerror(errno));
1475                 } else {
1476                         buf[n] = '\0';
1477                         sscanf(buf, "temperature: %lf", &last_acpi_temp);
1478                 }
1479         }
1480
1481         return last_acpi_temp;
1482 }
1483
1484 /*
1485 hipo@lepakko hipo $ cat /proc/acpi/battery/BAT1/info
1486 present:                 yes
1487 design capacity:         4400 mAh
1488 last full capacity:      4064 mAh
1489 battery technology:      rechargeable
1490 design voltage:          14800 mV
1491 design capacity warning: 300 mAh
1492 design capacity low:     200 mAh
1493 capacity granularity 1:  32 mAh
1494 capacity granularity 2:  32 mAh
1495 model number:            02KT
1496 serial number:           16922
1497 battery type:            LION
1498 OEM info:                SANYO
1499 */
1500
1501 /*
1502 hipo@lepakko conky $ cat /proc/acpi/battery/BAT1/state
1503 present:                 yes
1504 capacity state:          ok
1505 charging state:          unknown
1506 present rate:            0 mA
1507 remaining capacity:      4064 mAh
1508 present voltage:         16608 mV
1509 */
1510
1511 /*
1512 2213<@jupet�kellari��> jupet@lagi-unstable:~$ cat /proc/apm
1513 2213<@jupet�kellari��> 1.16 1.2 0x03 0x01 0xff 0x10 -1% -1 ?
1514 2213<@jupet�kellari��> (-1 ollee ei akkua kiinni, koska akku on p�yd�ll�)
1515 2214<@jupet�kellari��> jupet@lagi-unstable:~$ cat /proc/apm
1516 2214<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x03 0x09 98% -1 ?
1517
1518 2238<@jupet�kellari��> 1.16 1.2 0x03 0x00 0x00 0x01 100% -1 ? ilman verkkovirtaa
1519 2239<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x00 0x01 99% -1 ? verkkovirralla
1520
1521 2240<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x03 0x09 100% -1 ? verkkovirralla ja monitori p��ll�
1522 2241<@jupet�kellari��> 1.16 1.2 0x03 0x00 0x00 0x01 99% -1 ? monitori p��ll� mutta ilman verkkovirtaa
1523 */
1524
1525 /* Kapil Hari Paranjape <kapil@imsc.res.in>
1526   Linux 2.6.24 onwards battery info is in
1527   /sys/class/power_supply/BAT0/
1528   On my system I get the following.
1529         /sys/class/power_supply/BAT0/uevent:
1530         PHYSDEVPATH=/devices/LNXSYSTM:00/device:00/PNP0A03:00/device:01/PNP0C09:00/PNP0C0A:00
1531         PHYSDEVBUS=acpi
1532         PHYSDEVDRIVER=battery
1533         POWER_SUPPLY_NAME=BAT0
1534         POWER_SUPPLY_TYPE=Battery
1535         POWER_SUPPLY_STATUS=Discharging
1536         POWER_SUPPLY_PRESENT=1
1537         POWER_SUPPLY_TECHNOLOGY=Li-ion
1538         POWER_SUPPLY_VOLTAGE_MIN_DESIGN=10800000
1539         POWER_SUPPLY_VOLTAGE_NOW=10780000
1540         POWER_SUPPLY_CURRENT_NOW=13970000
1541         POWER_SUPPLY_ENERGY_FULL_DESIGN=47510000
1542         POWER_SUPPLY_ENERGY_FULL=27370000
1543         POWER_SUPPLY_ENERGY_NOW=11810000
1544         POWER_SUPPLY_MODEL_NAME=IBM-92P1060
1545         POWER_SUPPLY_MANUFACTURER=Panasonic
1546   On some systems POWER_SUPPLY_ENERGY_* is replaced by POWER_SUPPLY_CHARGE_*
1547 */
1548
1549 #define SYSFS_BATTERY_BASE_PATH "/sys/class/power_supply"
1550 #define ACPI_BATTERY_BASE_PATH "/proc/acpi/battery"
1551 #define APM_PATH "/proc/apm"
1552 #define MAX_BATTERY_COUNT 4
1553
1554 static FILE *sysfs_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1555 static FILE *acpi_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1556 static FILE *apm_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1557
1558 static int batteries_initialized = 0;
1559 static char batteries[MAX_BATTERY_COUNT][32];
1560
1561 static int acpi_last_full[MAX_BATTERY_COUNT];
1562 static int acpi_design_capacity[MAX_BATTERY_COUNT];
1563
1564 /* e.g. "charging 75%" */
1565 static char last_battery_str[MAX_BATTERY_COUNT][64];
1566 /* e.g. "3h 15m" */
1567 static char last_battery_time_str[MAX_BATTERY_COUNT][64];
1568
1569 static double last_battery_time[MAX_BATTERY_COUNT];
1570
1571 static int last_battery_perct[MAX_BATTERY_COUNT];
1572 static double last_battery_perct_time[MAX_BATTERY_COUNT];
1573
1574 void init_batteries(void)
1575 {
1576         int idx;
1577
1578         if (batteries_initialized) {
1579                 return;
1580         }
1581 #ifdef HAVE_OPENMP
1582 #pragma omp parallel for schedule(dynamic,10)
1583 #endif /* HAVE_OPENMP */
1584         for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) {
1585                 batteries[idx][0] = '\0';
1586         }
1587         batteries_initialized = 1;
1588 }
1589
1590 int get_battery_idx(const char *bat)
1591 {
1592         int idx;
1593
1594         for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) {
1595                 if (!strlen(batteries[idx]) || !strcmp(batteries[idx], bat)) {
1596                         break;
1597                 }
1598         }
1599
1600         /* if not found, enter a new entry */
1601         if (!strlen(batteries[idx])) {
1602                 snprintf(batteries[idx], 31, "%s", bat);
1603         }
1604
1605         return idx;
1606 }
1607
1608 void set_return_value(char *buffer, unsigned int n, int item, int idx);
1609
1610 void get_battery_stuff(char *buffer, unsigned int n, const char *bat, int item)
1611 {
1612         static int idx, rep = 0, rep1 = 0, rep2 = 0;
1613         char acpi_path[128];
1614         char sysfs_path[128];
1615
1616         snprintf(acpi_path, 127, ACPI_BATTERY_BASE_PATH "/%s/state", bat);
1617         snprintf(sysfs_path, 127, SYSFS_BATTERY_BASE_PATH "/%s/uevent", bat);
1618
1619         init_batteries();
1620
1621         idx = get_battery_idx(bat);
1622
1623         /* don't update battery too often */
1624         if (current_update_time - last_battery_time[idx] < 29.5) {
1625                 set_return_value(buffer, n, item, idx);
1626                 return;
1627         }
1628
1629         last_battery_time[idx] = current_update_time;
1630
1631         memset(last_battery_str[idx], 0, sizeof(last_battery_str[idx]));
1632         memset(last_battery_time_str[idx], 0, sizeof(last_battery_time_str[idx]));
1633
1634         /* first try SYSFS if that fails try ACPI */
1635
1636         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1637                 sysfs_bat_fp[idx] = open_file(sysfs_path, &rep);
1638         }
1639
1640         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1641                 acpi_bat_fp[idx] = open_file(acpi_path, &rep1);
1642         }
1643
1644         if (sysfs_bat_fp[idx] != NULL) {
1645                 /* SYSFS */
1646                 int present_rate = -1;
1647                 int remaining_capacity = -1;
1648                 char charging_state[64];
1649                 char present[4];
1650
1651                 strcpy(charging_state, "unknown");
1652
1653                 while (!feof(sysfs_bat_fp[idx])) {
1654                         char buf[256];
1655                         if (fgets(buf, 256, sysfs_bat_fp[idx]) == NULL)
1656                                 break;
1657
1658                         /* let's just hope units are ok */
1659                         if (strncmp (buf, "POWER_SUPPLY_PRESENT=1", 22) == 0)
1660                                 strcpy(present, "yes");
1661                         else if (strncmp (buf, "POWER_SUPPLY_PRESENT=0", 22) == 0)
1662                                 strcpy(present, "no");
1663                         else if (strncmp (buf, "POWER_SUPPLY_STATUS=", 20) == 0)
1664                                 sscanf(buf, "POWER_SUPPLY_STATUS=%63s", charging_state);
1665                         /* present_rate is not the same as the
1666                         current flowing now but it is the same value
1667                         which was used in the past. so we continue
1668                         the tradition! */
1669                         else if (strncmp(buf, "POWER_SUPPLY_CURRENT_NOW=", 25) == 0)
1670                                 sscanf(buf, "POWER_SUPPLY_CURRENT_NOW=%d", &present_rate);
1671                         else if (strncmp(buf, "POWER_SUPPLY_ENERGY_NOW=", 24) == 0)
1672                                 sscanf(buf, "POWER_SUPPLY_ENERGY_NOW=%d", &remaining_capacity);
1673                         else if (strncmp(buf, "POWER_SUPPLY_ENERGY_FULL=", 25) == 0)
1674                                 sscanf(buf, "POWER_SUPPLY_ENERGY_FULL=%d", &acpi_last_full[idx]);
1675                         else if (strncmp(buf, "POWER_SUPPLY_CHARGE_NOW=", 24) == 0)
1676                                 sscanf(buf, "POWER_SUPPLY_CHARGE_NOW=%d", &remaining_capacity);
1677                         else if (strncmp(buf, "POWER_SUPPLY_CHARGE_FULL=", 25) == 0)
1678                                 sscanf(buf, "POWER_SUPPLY_CHARGE_FULL=%d", &acpi_last_full[idx]);
1679                 }
1680
1681                 fclose(sysfs_bat_fp[idx]);
1682                 sysfs_bat_fp[idx] = NULL;
1683
1684                 /* Hellf[i]re notes that remaining capacity can exceed acpi_last_full */
1685                 if (remaining_capacity > acpi_last_full[idx])
1686                         acpi_last_full[idx] = remaining_capacity;  /* normalize to 100% */
1687
1688                 /* not present */
1689                 if (strcmp(present, "No") == 0) {
1690                         strncpy(last_battery_str[idx], "not present", 64);
1691                 }
1692                 /* charging */
1693                 else if (strcmp(charging_state, "Charging") == 0) {
1694                         if (acpi_last_full[idx] != 0 && present_rate > 0) {
1695                                 /* e.g. charging 75% */
1696                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "charging %i%%",
1697                                         (int) (((float) remaining_capacity / acpi_last_full[idx]) * 100 ));
1698                                 /* e.g. 2h 37m */
1699                                 format_seconds(last_battery_time_str[idx], sizeof(last_battery_time_str[idx])-1,
1700                                               (long) (((float)(acpi_last_full[idx] - remaining_capacity) / present_rate) * 3600));
1701                         } else if (acpi_last_full[idx] != 0 && present_rate <= 0) {
1702                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "charging %d%%",
1703                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1704                                 snprintf(last_battery_time_str[idx],
1705                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1706                         } else {
1707                                 strncpy(last_battery_str[idx], "charging", sizeof(last_battery_str[idx])-1);
1708                                 snprintf(last_battery_time_str[idx],
1709                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1710                         }
1711                 }
1712                 /* discharging */
1713                 else if (strncmp(charging_state, "Discharging", 64) == 0) {
1714                         if (present_rate > 0) {
1715                                 /* e.g. discharging 35% */
1716                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "discharging %i%%",
1717                                         (int) (((float) remaining_capacity / acpi_last_full[idx]) * 100 ));
1718                                 /* e.g. 1h 12m */
1719                                 format_seconds(last_battery_time_str[idx], sizeof(last_battery_time_str[idx])-1,
1720                                               (long) (((float) remaining_capacity / present_rate) * 3600));
1721                         } else if (present_rate == 0) { /* Thanks to Nexox for this one */
1722                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "full");
1723                                 snprintf(last_battery_time_str[idx],
1724                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1725                         } else {
1726                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1,
1727                                         "discharging %d%%",
1728                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1729                                 snprintf(last_battery_time_str[idx],
1730                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1731                         }
1732                 }
1733                 /* charged */
1734                 /* thanks to Lukas Zapletal <lzap@seznam.cz> */
1735                 else if (strncmp(charging_state, "Charged", 64) == 0 || strncmp(charging_state, "Full", 64) == 0) {
1736                                 /* Below happens with the second battery on my X40,
1737                                  * when the second one is empty and the first one
1738                                  * being charged. */
1739                                 if (remaining_capacity == 0)
1740                                         strcpy(last_battery_str[idx], "empty");
1741                                 else
1742                                         strcpy(last_battery_str[idx], "charged");
1743                 }
1744                 /* unknown, probably full / AC */
1745                 else {
1746                         if (acpi_last_full[idx] != 0
1747                             && remaining_capacity != acpi_last_full[idx])
1748                                 snprintf(last_battery_str[idx], 64, "unknown %d%%",
1749                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1750                         else
1751                                 strncpy(last_battery_str[idx], "AC", 64);
1752                 }
1753         } else if (acpi_bat_fp[idx] != NULL) {
1754                 /* ACPI */
1755                 int present_rate = -1;
1756                 int remaining_capacity = -1;
1757                 char charging_state[64];
1758                 char present[4];
1759
1760                 /* read last full capacity if it's zero */
1761                 if (acpi_last_full[idx] == 0) {
1762                         static int rep3 = 0;
1763                         char path[128];
1764                         FILE *fp;
1765
1766                         snprintf(path, 127, ACPI_BATTERY_BASE_PATH "/%s/info", bat);
1767                         fp = open_file(path, &rep3);
1768                         if (fp != NULL) {
1769                                 while (!feof(fp)) {
1770                                         char b[256];
1771
1772                                         if (fgets(b, 256, fp) == NULL) {
1773                                                 break;
1774                                         }
1775                                         if (sscanf(b, "last full capacity: %d",
1776                                                                 &acpi_last_full[idx]) != 0) {
1777                                                 break;
1778                                         }
1779                                 }
1780
1781                                 fclose(fp);
1782                         }
1783                 }
1784
1785                 fseek(acpi_bat_fp[idx], 0, SEEK_SET);
1786
1787                 strcpy(charging_state, "unknown");
1788
1789                 while (!feof(acpi_bat_fp[idx])) {
1790                         char buf[256];
1791
1792                         if (fgets(buf, 256, acpi_bat_fp[idx]) == NULL) {
1793                                 break;
1794                         }
1795
1796                         /* let's just hope units are ok */
1797                         if (strncmp(buf, "present:", 8) == 0) {
1798                                 sscanf(buf, "present: %4s", present);
1799                         } else if (strncmp(buf, "charging state:", 15) == 0) {
1800                                 sscanf(buf, "charging state: %63s", charging_state);
1801                         } else if (strncmp(buf, "present rate:", 13) == 0) {
1802                                 sscanf(buf, "present rate: %d", &present_rate);
1803                         } else if (strncmp(buf, "remaining capacity:", 19) == 0) {
1804                                 sscanf(buf, "remaining capacity: %d", &remaining_capacity);
1805                         }
1806                 }
1807                 /* Hellf[i]re notes that remaining capacity can exceed acpi_last_full */
1808                 if (remaining_capacity > acpi_last_full[idx]) {
1809                         /* normalize to 100% */
1810                         acpi_last_full[idx] = remaining_capacity;
1811                 }
1812
1813                 /* not present */
1814                 if (strcmp(present, "no") == 0) {
1815                         strncpy(last_battery_str[idx], "not present", 64);
1816                         /* charging */
1817                 } else if (strcmp(charging_state, "charging") == 0) {
1818                         if (acpi_last_full[idx] != 0 && present_rate > 0) {
1819                                 /* e.g. charging 75% */
1820                                 snprintf(last_battery_str[idx],
1821                                                 sizeof(last_battery_str[idx]) - 1, "charging %i%%",
1822                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1823                                 /* e.g. 2h 37m */
1824                                 format_seconds(last_battery_time_str[idx],
1825                                                 sizeof(last_battery_time_str[idx]) - 1,
1826                                                 (long) (((acpi_last_full[idx] - remaining_capacity) *
1827                                                                 3600) / present_rate));
1828                         } else if (acpi_last_full[idx] != 0 && present_rate <= 0) {
1829                                 snprintf(last_battery_str[idx],
1830                                                 sizeof(last_battery_str[idx]) - 1, "charging %d%%",
1831                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1832                                 snprintf(last_battery_time_str[idx],
1833                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1834                         } else {
1835                                 strncpy(last_battery_str[idx], "charging",
1836                                                 sizeof(last_battery_str[idx]) - 1);
1837                                 snprintf(last_battery_time_str[idx],
1838                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1839                         }
1840                         /* discharging */
1841                 } else if (strncmp(charging_state, "discharging", 64) == 0) {
1842                         if (present_rate > 0) {
1843                                 /* e.g. discharging 35% */
1844                                 snprintf(last_battery_str[idx],
1845                                                 sizeof(last_battery_str[idx]) - 1, "discharging %i%%",
1846                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1847                                 /* e.g. 1h 12m */
1848                                 format_seconds(last_battery_time_str[idx],
1849                                                 sizeof(last_battery_time_str[idx]) - 1,
1850                                                 (long) ((remaining_capacity * 3600) / present_rate));
1851                         } else if (present_rate == 0) { /* Thanks to Nexox for this one */
1852                                 snprintf(last_battery_str[idx],
1853                                                 sizeof(last_battery_str[idx]) - 1, "full");
1854                                 snprintf(last_battery_time_str[idx],
1855                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1856                         } else {
1857                                 snprintf(last_battery_str[idx],
1858                                                 sizeof(last_battery_str[idx]) - 1, "discharging %d%%",
1859                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1860                                 snprintf(last_battery_time_str[idx],
1861                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1862                         }
1863                         /* charged */
1864                 } else if (strncmp(charging_state, "charged", 64) == 0) {
1865                         /* thanks to Lukas Zapletal <lzap@seznam.cz> */
1866                         /* Below happens with the second battery on my X40,
1867                          * when the second one is empty and the first one being charged. */
1868                         if (remaining_capacity == 0) {
1869                                 strcpy(last_battery_str[idx], "empty");
1870                         } else {
1871                                 strcpy(last_battery_str[idx], "charged");
1872                         }
1873                         /* unknown, probably full / AC */
1874                 } else {
1875                         if (strncmp(charging_state, "Full", 64) == 0) {
1876                                 strncpy(last_battery_str[idx], "full", 64);
1877                         } else if (acpi_last_full[idx] != 0
1878                                         && remaining_capacity != acpi_last_full[idx]) {
1879                                 snprintf(last_battery_str[idx], 64, "unknown %d%%",
1880                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1881                         } else {
1882                                 strncpy(last_battery_str[idx], "AC", 64);
1883                         }
1884                 }
1885                 fclose(acpi_bat_fp[idx]);
1886                 acpi_bat_fp[idx] = NULL;
1887         } else {
1888                 /* APM */
1889                 if (apm_bat_fp[idx] == NULL) {
1890                         apm_bat_fp[idx] = open_file(APM_PATH, &rep2);
1891                 }
1892
1893                 if (apm_bat_fp[idx] != NULL) {
1894                         unsigned int ac, status, flag;
1895                         int life;
1896
1897                         fscanf(apm_bat_fp[idx], "%*s %*s %*x %x   %x       %x     %d%%",
1898                                 &ac, &status, &flag, &life);
1899
1900                         if (life == -1) {
1901                                 /* could check now that there is ac */
1902                                 snprintf(last_battery_str[idx], 64, "AC");
1903
1904                         /* could check that status == 3 here? */
1905                         } else if (ac && life != 100) {
1906                                 snprintf(last_battery_str[idx], 64, "charging %d%%", life);
1907                         } else {
1908                                 snprintf(last_battery_str[idx], 64, "%d%%", life);
1909                         }
1910
1911                         /* it seemed to buffer it so file must be closed (or could use
1912                          * syscalls directly but I don't feel like coding it now) */
1913                         fclose(apm_bat_fp[idx]);
1914                         apm_bat_fp[idx] = NULL;
1915                 }
1916         }
1917         set_return_value(buffer, n, item, idx);
1918 }
1919
1920 void set_return_value(char *buffer, unsigned int n, int item, int idx)
1921 {
1922         switch (item) {
1923                 case BATTERY_STATUS:
1924                         snprintf(buffer, n, "%s", last_battery_str[idx]);
1925                         break;
1926                 case BATTERY_TIME:
1927                         snprintf(buffer, n, "%s", last_battery_time_str[idx]);
1928                         break;
1929                 default:
1930                         break;
1931         }
1932 }
1933
1934 void get_battery_short_status(char *buffer, unsigned int n, const char *bat)
1935 {
1936         get_battery_stuff(buffer, n, bat, BATTERY_STATUS);
1937         if (0 == strncmp("charging", buffer, 8)) {
1938                 buffer[0] = 'C';
1939                 memmove(buffer + 1, buffer + 8, n - 8);
1940         } else if (0 == strncmp("discharging", buffer, 11)) {
1941                 buffer[0] = 'D';
1942                 memmove(buffer + 1, buffer + 11, n - 11);
1943         } else if (0 == strncmp("charged", buffer, 7)) {
1944                 buffer[0] = 'F';
1945                 memmove(buffer + 1, buffer + 7, n - 7);
1946         } else if (0 == strncmp("not present", buffer, 11)) {
1947                 buffer[0] = 'N';
1948                 memmove(buffer + 1, buffer + 11, n - 11);
1949         } else if (0 == strncmp("empty", buffer, 5)) {
1950                 buffer[0] = 'E';
1951                 memmove(buffer + 1, buffer + 5, n - 5);
1952         } else if (0 != strncmp("AC", buffer, 2)) {
1953                 buffer[0] = 'U';
1954                 memmove(buffer + 1, buffer + 11, n - 11);
1955         }
1956 }
1957
1958 int get_battery_perct(const char *bat)
1959 {
1960         static int rep = 0;
1961         int idx;
1962         char acpi_path[128];
1963         char sysfs_path[128];
1964         int remaining_capacity = -1;
1965
1966         snprintf(acpi_path, 127, ACPI_BATTERY_BASE_PATH "/%s/state", bat);
1967         snprintf(sysfs_path, 127, SYSFS_BATTERY_BASE_PATH "/%s/uevent", bat);
1968
1969         init_batteries();
1970
1971         idx = get_battery_idx(bat);
1972
1973         /* don't update battery too often */
1974         if (current_update_time - last_battery_perct_time[idx] < 30) {
1975                 return last_battery_perct[idx];
1976         }
1977         last_battery_perct_time[idx] = current_update_time;
1978
1979         /* Only check for SYSFS or ACPI */
1980
1981         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1982                 sysfs_bat_fp[idx] = open_file(sysfs_path, &rep);
1983                 rep = 0;
1984         }
1985
1986         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1987                 acpi_bat_fp[idx] = open_file(acpi_path, &rep);
1988         }
1989
1990         if (sysfs_bat_fp[idx] != NULL) {
1991                 /* SYSFS */
1992                 while (!feof(sysfs_bat_fp[idx])) {
1993                         char buf[256];
1994                         if (fgets(buf, 256, sysfs_bat_fp[idx]) == NULL)
1995                                 break;
1996
1997                         if (strncmp(buf, "POWER_SUPPLY_CHARGE_NOW=", 24) == 0) {
1998                                 sscanf(buf, "POWER_SUPPLY_CHARGE_NOW=%d", &remaining_capacity);
1999                         } else if (strncmp(buf, "POWER_SUPPLY_CHARGE_FULL=",25) == 0) {
2000                                 sscanf(buf, "POWER_SUPPLY_CHARGE_FULL=%d", &acpi_design_capacity[idx]);
2001                         } else if (strncmp(buf, "POWER_SUPPLY_ENERGY_NOW=", 24) == 0) {
2002                                 sscanf(buf, "POWER_SUPPLY_ENERGY_NOW=%d", &remaining_capacity);
2003                         } else if (strncmp(buf, "POWER_SUPPLY_ENERGY_FULL=",25) == 0) {
2004                                 sscanf(buf, "POWER_SUPPLY_ENERGY_FULL=%d", &acpi_design_capacity[idx]);
2005                         }
2006                 }
2007
2008                 fclose(sysfs_bat_fp[idx]);
2009                 sysfs_bat_fp[idx] = NULL;
2010
2011         } else if (acpi_bat_fp[idx] != NULL) {
2012                 /* ACPI */
2013                 /* read last full capacity if it's zero */
2014                 if (acpi_design_capacity[idx] == 0) {
2015                         static int rep2;
2016                         char path[128];
2017                         FILE *fp;
2018
2019                         snprintf(path, 127, ACPI_BATTERY_BASE_PATH "/%s/info", bat);
2020                         fp = open_file(path, &rep2);
2021                         if (fp != NULL) {
2022                                 while (!feof(fp)) {
2023                                         char b[256];
2024
2025                                         if (fgets(b, 256, fp) == NULL) {
2026                                                 break;
2027                                         }
2028                                         if (sscanf(b, "last full capacity: %d",
2029                                                                 &acpi_design_capacity[idx]) != 0) {
2030                                                 break;
2031                                         }
2032                                 }
2033                                 fclose(fp);
2034                         }
2035                 }
2036
2037                 fseek(acpi_bat_fp[idx], 0, SEEK_SET);
2038
2039                 while (!feof(acpi_bat_fp[idx])) {
2040                         char buf[256];
2041
2042                         if (fgets(buf, 256, acpi_bat_fp[idx]) == NULL) {
2043                                 break;
2044                         }
2045
2046                         if (buf[0] == 'r') {
2047                                 sscanf(buf, "remaining capacity: %d", &remaining_capacity);
2048                         }
2049                 }
2050         }
2051         if (remaining_capacity < 0) {
2052                 return 0;
2053         }
2054         /* compute the battery percentage */
2055         last_battery_perct[idx] =
2056                 (int) (((float) remaining_capacity / acpi_design_capacity[idx]) * 100);
2057         if (last_battery_perct[idx] > 100) last_battery_perct[idx] = 100;
2058         return last_battery_perct[idx];
2059 }
2060
2061 int get_battery_perct_bar(const char *bar)
2062 {
2063         int idx;
2064
2065         get_battery_perct(bar);
2066         idx = get_battery_idx(bar);
2067         return (int) (last_battery_perct[idx] * 2.56 - 1);
2068 }
2069
2070 /* On Apple powerbook and ibook:
2071 $ cat /proc/pmu/battery_0
2072 flags      : 00000013
2073 charge     : 3623
2074 max_charge : 3720
2075 current    : 388
2076 voltage    : 16787
2077 time rem.  : 900
2078 $ cat /proc/pmu/info
2079 PMU driver version     : 2
2080 PMU firmware version   : 0c
2081 AC Power               : 1
2082 Battery count          : 1
2083 */
2084
2085 /* defines as in <linux/pmu.h> */
2086 #define PMU_BATT_PRESENT                0x00000001
2087 #define PMU_BATT_CHARGING               0x00000002
2088
2089 static FILE *pmu_battery_fp;
2090 static FILE *pmu_info_fp;
2091 static char pb_battery_info[3][32];
2092 static double pb_battery_info_update;
2093
2094 #define PMU_PATH "/proc/pmu"
2095 void get_powerbook_batt_info(char *buffer, size_t n, int i)
2096 {
2097         static int rep = 0;
2098         const char *batt_path = PMU_PATH "/battery_0";
2099         const char *info_path = PMU_PATH "/info";
2100         unsigned int flags;
2101         int charge, max_charge, ac = -1;
2102         long timeval = -1;
2103
2104         /* don't update battery too often */
2105         if (current_update_time - pb_battery_info_update < 29.5) {
2106                 snprintf(buffer, n, "%s", pb_battery_info[i]);
2107                 return;
2108         }
2109         pb_battery_info_update = current_update_time;
2110
2111         if (pmu_battery_fp == NULL) {
2112                 pmu_battery_fp = open_file(batt_path, &rep);
2113                 if (pmu_battery_fp == NULL) {
2114                         return;
2115                 }
2116         }
2117
2118         if (pmu_battery_fp != NULL) {
2119                 rewind(pmu_battery_fp);
2120                 while (!feof(pmu_battery_fp)) {
2121                         char buf[32];
2122
2123                         if (fgets(buf, sizeof(buf), pmu_battery_fp) == NULL) {
2124                                 break;
2125                         }
2126
2127                         if (buf[0] == 'f') {
2128                                 sscanf(buf, "flags      : %8x", &flags);
2129                         } else if (buf[0] == 'c' && buf[1] == 'h') {
2130                                 sscanf(buf, "charge     : %d", &charge);
2131                         } else if (buf[0] == 'm') {
2132                                 sscanf(buf, "max_charge : %d", &max_charge);
2133                         } else if (buf[0] == 't') {
2134                                 sscanf(buf, "time rem.  : %ld", &timeval);
2135                         }
2136                 }
2137         }
2138         if (pmu_info_fp == NULL) {
2139                 pmu_info_fp = open_file(info_path, &rep);
2140                 if (pmu_info_fp == NULL) {
2141                         return;
2142                 }
2143         }
2144
2145         if (pmu_info_fp != NULL) {
2146                 rewind(pmu_info_fp);
2147                 while (!feof(pmu_info_fp)) {
2148                         char buf[32];
2149
2150                         if (fgets(buf, sizeof(buf), pmu_info_fp) == NULL) {
2151                                 break;
2152                         }
2153                         if (buf[0] == 'A') {
2154                                 sscanf(buf, "AC Power               : %d", &ac);
2155                         }
2156                 }
2157         }
2158         /* update status string */
2159         if ((ac && !(flags & PMU_BATT_PRESENT))) {
2160                 strncpy(pb_battery_info[PB_BATT_STATUS], "AC", sizeof(pb_battery_info[PB_BATT_STATUS]));
2161         } else if (ac && (flags & PMU_BATT_PRESENT)
2162                         && !(flags & PMU_BATT_CHARGING)) {
2163                 strncpy(pb_battery_info[PB_BATT_STATUS], "charged", sizeof(pb_battery_info[PB_BATT_STATUS]));
2164         } else if ((flags & PMU_BATT_PRESENT) && (flags & PMU_BATT_CHARGING)) {
2165                 strncpy(pb_battery_info[PB_BATT_STATUS], "charging", sizeof(pb_battery_info[PB_BATT_STATUS]));
2166         } else {
2167                 strncpy(pb_battery_info[PB_BATT_STATUS], "discharging", sizeof(pb_battery_info[PB_BATT_STATUS]));
2168         }
2169
2170         /* update percentage string */
2171         if (timeval == 0 && ac && (flags & PMU_BATT_PRESENT)
2172                         && !(flags & PMU_BATT_CHARGING)) {
2173                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2174                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "100%%");
2175         } else if (timeval == 0) {
2176                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2177                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "unknown");
2178         } else {
2179                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2180                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "%d%%",
2181                         (charge * 100) / max_charge);
2182         }
2183
2184         /* update time string */
2185         if (timeval == 0) {                     /* fully charged or battery not present */
2186                 snprintf(pb_battery_info[PB_BATT_TIME],
2187                         sizeof(pb_battery_info[PB_BATT_TIME]), "unknown");
2188         } else if (timeval < 60 * 60) { /* don't show secs */
2189                 format_seconds_short(pb_battery_info[PB_BATT_TIME],
2190                         sizeof(pb_battery_info[PB_BATT_TIME]), timeval);
2191         } else {
2192                 format_seconds(pb_battery_info[PB_BATT_TIME],
2193                         sizeof(pb_battery_info[PB_BATT_TIME]), timeval);
2194         }
2195
2196         snprintf(buffer, n, "%s", pb_battery_info[i]);
2197 }
2198
2199 void update_top(void)
2200 {
2201         process_find_top(info.cpu, info.memu, info.time
2202 #ifdef IOSTATS
2203                 , info.io
2204 #endif
2205                 );
2206         info.first_process = get_first_process();
2207 }
2208
2209 #define ENTROPY_AVAIL_PATH "/proc/sys/kernel/random/entropy_avail"
2210
2211 int get_entropy_avail(unsigned int *val)
2212 {
2213         static int rep = 0;
2214         FILE *fp;
2215
2216         if (!(fp = open_file(ENTROPY_AVAIL_PATH, &rep)))
2217                 return 1;
2218
2219         if (fscanf(fp, "%u", val) != 1)
2220                 return 1;
2221
2222         fclose(fp);
2223         return 0;
2224 }
2225
2226 #define ENTROPY_POOLSIZE_PATH "/proc/sys/kernel/random/poolsize"
2227
2228 int get_entropy_poolsize(unsigned int *val)
2229 {
2230         static int rep = 0;
2231         FILE *fp;
2232
2233         if (!(fp = open_file(ENTROPY_POOLSIZE_PATH, &rep)))
2234                 return 1;
2235
2236         if (fscanf(fp, "%u", val) != 1)
2237                 return 1;
2238
2239         fclose(fp);
2240         return 0;
2241 }
2242
2243 const char *get_disk_protect_queue(const char *disk)
2244 {
2245         FILE *fp;
2246         char path[128];
2247         int state;
2248
2249         snprintf(path, 127, "/sys/block/%s/device/unload_heads", disk);
2250         if (access(path, F_OK)) {
2251                 snprintf(path, 127, "/sys/block/%s/queue/protect", disk);
2252         }
2253         if ((fp = fopen(path, "r")) == NULL)
2254                 return "n/a   ";
2255         if (fscanf(fp, "%d\n", &state) != 1) {
2256                 fclose(fp);
2257                 return "failed";
2258         }
2259         fclose(fp);
2260         return (state > 0) ? "frozen" : "free  ";
2261 }
2262
2263 void update_diskio(void)
2264 {
2265         FILE *fp;
2266         static int rep = 0;
2267         char buf[512], devbuf[64];
2268         unsigned int major, minor;
2269         int col_count = 0;
2270         struct diskio_stat *cur;
2271         unsigned int reads, writes;
2272         unsigned int total_reads = 0, total_writes = 0;
2273
2274         stats.current = 0;
2275         stats.current_read = 0;
2276         stats.current_write = 0;
2277
2278         if (!(fp = open_file("/proc/diskstats", &rep))) {
2279                 return;
2280         }
2281
2282         /* read reads and writes from all disks (minor = 0), including cd-roms
2283          * and floppies, and sum them up */
2284         while (fgets(buf, 512, fp)) {
2285                 col_count = sscanf(buf, "%u %u %s %*u %*u %u %*u %*u %*u %u", &major,
2286                         &minor, devbuf, &reads, &writes);
2287                 /* ignore subdevices (they have only 3 matching entries in their line)
2288                  * and virtual devices (LVM, network block devices, RAM disks, Loopback)
2289                  *
2290                  * XXX: ignore devices which are part of a SW RAID (MD_MAJOR) */
2291                 if (col_count == 5 && major != LVM_BLK_MAJOR && major != NBD_MAJOR
2292                                 && major != RAMDISK_MAJOR && major != LOOP_MAJOR) {
2293                         total_reads += reads;
2294                         total_writes += writes;
2295                 } else {
2296                         col_count = sscanf(buf, "%u %u %s %*u %u %*u %u",
2297                                 &major, &minor, devbuf, &reads, &writes);
2298                         if (col_count != 5) {
2299                                 continue;
2300                         }
2301                 }
2302                 cur = stats.next;
2303                 while (cur && strcmp(devbuf, cur->dev))
2304                         cur = cur->next;
2305
2306                 if (cur)
2307                         update_diskio_values(cur, reads, writes);
2308         }
2309         update_diskio_values(&stats, total_reads, total_writes);
2310         fclose(fp);
2311 }