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 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_threads = 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_threads);
 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 /***********************************************************/
 823 /***********************************************************/
 824 /***********************************************************/
 825
 826 static int no_dots(const struct dirent *d)
 827 {
 828         if (d->d_name[0] == '.') {
 829                 return 0;
 830         }
 831         return 1;
 832 }
 833
 834 static int get_first_file_in_a_directory(const char *dir, char *s, int *rep)
 835 {
 836         struct dirent **namelist;
 837         int i, n;
 838
 839         n = scandir(dir, &namelist, no_dots, alphasort);
 840         if (n < 0) {
 841                 if (!rep || !*rep) {
 842                         NORM_ERR("scandir for %s: %s", dir, strerror(errno));
 843                         if (rep) {
 844                                 *rep = 1;
 845                         }
 846                 }
 847                 return 0;
 848         } else {
 849                 if (n == 0) {
 850                         return 0;
 851                 }
 852
 853                 strncpy(s, namelist[0]->d_name, 255);
 854                 s[255] = '\0';
 855
 856 #ifdef HAVE_OPENMP
 857 #pragma omp parallel for schedule(dynamic,10)
 858 #endif /* HAVE_OPENMP */
 859                 for (i = 0; i < n; i++) {
 860                         free(namelist[i]);
 861                 }
 862                 free(namelist);
 863
 864                 return 1;
 865         }
 866 }
 867
 868 static int open_sysfs_sensor(const char *dir, const char *dev, const char *type, int n,
 869                 int *divisor, char *devtype)
 870 {
 871         char path[256];
 872         char buf[256];
 873         int fd;
 874         int divfd;
 875
 876         memset(buf, 0, sizeof(buf));
 877
 878         /* if device is NULL or *, get first */
 879         if (dev == NULL || strcmp(dev, "*") == 0) {
 880                 static int rep = 0;
 881
 882                 if (!get_first_file_in_a_directory(dir, buf, &rep)) {
 883                         return -1;
 884                 }
 885                 dev = buf;
 886         }
 887
 888         if (strcmp(dir, "/sys/class/hwmon/") == 0) {
 889                 if (*buf) {
 890                         /* buf holds result from get_first_file_in_a_directory() above,
 891                          * e.g. "hwmon0" -- append "/device" */
 892                         strcat(buf, "/device");
 893                 } else {
 894                         /* dev holds device number N as a string,
 895                          * e.g. "0", -- convert to "hwmon0/device" */
 896                         sprintf(buf, "hwmon%s/device", dev);
 897                         dev = buf;
 898                 }
 899         }
 900
 901         /* change vol to in, tempf to temp */
 902         if (strcmp(type, "vol") == 0) {
 903                 type = "in";
 904         } else if (strcmp(type, "tempf") == 0) {
 905                 type = "temp";
 906         }
 907
 908         /* construct path */
 909         snprintf(path, 255, "%s%s/%s%d_input", dir, dev, type, n);
 910
 911         /* first, attempt to open file in /device */
 912         fd = open(path, O_RDONLY);
 913         if (fd < 0) {
 914
 915                 /* if it fails, strip the /device from dev and attempt again */
 916                 buf[strlen(buf) - 7] = 0;
 917                 snprintf(path, 255, "%s%s/%s%d_input", dir, dev, type, n);
 918                 fd = open(path, O_RDONLY);
 919                 if (fd < 0) {
 920                         CRIT_ERR(NULL, NULL, "can't open '%s': %s\nplease check your device or remove this "
 921                                          "var from "PACKAGE_NAME, path, strerror(errno));
 922                 }
 923         }
 924
 925         strncpy(devtype, path, 255);
 926
 927         if (strcmp(type, "in") == 0 || strcmp(type, "temp") == 0
 928                         || strcmp(type, "tempf") == 0) {
 929                 *divisor = 1;
 930         } else {
 931                 *divisor = 0;
 932         }
 933         /* fan does not use *_div as a read divisor */
 934         if (strcmp("fan", type) == 0) {
 935                 return fd;
 936         }
 937
 938         /* test if *_div file exist, open it and use it as divisor */
 939         if (strcmp(type, "tempf") == 0) {
 940                 snprintf(path, 255, "%s%s/%s%d_div", dir, "one", "two", n);
 941         } else {
 942                 snprintf(path, 255, "%s%s/%s%d_div", dir, dev, type, n);
 943         }
 944
 945         divfd = open(path, O_RDONLY);
 946         if (divfd > 0) {
 947                 /* read integer */
 948                 char divbuf[64];
 949                 int divn;
 950
 951                 divn = read(divfd, divbuf, 63);
 952                 /* should read until n == 0 but I doubt that kernel will give these
 953                  * in multiple pieces. :) */
 954                 if (divn < 0) {
 955                         NORM_ERR("open_sysfs_sensor(): can't read from sysfs");
 956                 } else {
 957                         divbuf[divn] = '\0';
 958                         *divisor = atoi(divbuf);
 959                 }
 960                 close(divfd);
 961         }
 962
 963         return fd;
 964 }
 965
 966 static double get_sysfs_info(int *fd, int divisor, char *devtype, char *type)
 967 {
 968         int val = 0;
 969
 970         if (*fd <= 0) {
 971                 return 0;
 972         }
 973
 974         lseek(*fd, 0, SEEK_SET);
 975
 976         /* read integer */
 977         {
 978                 char buf[64];
 979                 int n;
 980                 n = read(*fd, buf, 63);
 981                 /* should read until n == 0 but I doubt that kernel will give these
 982                  * in multiple pieces. :) */
 983                 if (n < 0) {
 984                         NORM_ERR("get_sysfs_info(): read from %s failed\n", devtype);
 985                 } else {
 986                         buf[n] = '\0';
 987                         val = atoi(buf);
 988                 }
 989         }
 990
 991         close(*fd);
 992         /* open file */
 993         *fd = open(devtype, O_RDONLY);
 994         if (*fd < 0) {
 995                 NORM_ERR("can't open '%s': %s", devtype, strerror(errno));
 996         }
 997
 998         /* My dirty hack for computing CPU value
 999          * Filedil, from forums.gentoo.org */
1000         /* if (strstr(devtype, "temp1_input") != NULL) {
1001                 return -15.096 + 1.4893 * (val / 1000.0);
1002         } */
1003
1004         /* divide voltage and temperature by 1000 */
1005         /* or if any other divisor is given, use that */
1006         if (strcmp(type, "tempf") == 0) {
1007                 if (divisor > 1) {
1008                         return ((val / divisor + 40) * 9.0 / 5) - 40;
1009                 } else if (divisor) {
1010                         return ((val / 1000.0 + 40) * 9.0 / 5) - 40;
1011                 } else {
1012                         return ((val + 40) * 9.0 / 5) - 40;
1013                 }
1014         } else {
1015                 if (divisor > 1) {
1016                         return val / divisor;
1017                 } else if (divisor) {
1018                         return val / 1000.0;
1019                 } else {
1020                         return val;
1021                 }
1022         }
1023 }
1024
1025 #define HWMON_RESET() {\
1026                 buf1[0] = 0; \
1027                 factor = 1.0; \
1028                 offset = 0.0; }
1029
1030 static void parse_sysfs_sensor(struct text_object *obj, const char *arg, const char *path, const char *type)
1031 {
1032         char buf1[64], buf2[64];
1033         float factor, offset;
1034         int n, found = 0;
1035         struct sysfs *sf;
1036
1037         if (sscanf(arg, "%63s %d %f %f", buf2, &n, &factor, &offset) == 4) found = 1; else HWMON_RESET();
1038         if (!found && sscanf(arg, "%63s %63s %d %f %f", buf1, buf2, &n, &factor, &offset) == 5) found = 1; else if (!found) HWMON_RESET();
1039         if (!found && sscanf(arg, "%63s %63s %d", buf1, buf2, &n) == 3) found = 1; else if (!found) HWMON_RESET();
1040         if (!found && sscanf(arg, "%63s %d", buf2, &n) == 2) found = 1; else if (!found) HWMON_RESET();
1041
1042         if (!found) {
1043                 NORM_ERR("i2c failed to parse arguments");
1044                 obj->type = OBJ_text;
1045                 return;
1046         }
1047         DBGP("parsed %s args: '%s' '%s' %d %f %f\n", type, buf1, buf2, n, factor, offset);
1048         sf = malloc(sizeof(struct sysfs));
1049         memset(sf, 0, sizeof(struct sysfs));
1050         sf->fd = open_sysfs_sensor(path, (*buf1) ? buf1 : 0, buf2, n,
1051                         &sf->arg, sf->devtype);
1052         strncpy(sf->type, buf2, 63);
1053         sf->factor = factor;
1054         sf->offset = offset;
1055         obj->data.opaque = sf;
1056 }
1057
1058 #define PARSER_GENERATOR(name, path)                                \
1059 void parse_##name##_sensor(struct text_object *obj, const char *arg) \
1060 {                                                                   \
1061         parse_sysfs_sensor(obj, arg, path, #name);           \
1062 }
1063
1064 PARSER_GENERATOR(i2c, "/sys/bus/i2c/devices/")
1065 PARSER_GENERATOR(hwmon, "/sys/class/hwmon/")
1066 PARSER_GENERATOR(platform, "/sys/bus/platform/devices/")
1067
1068 void print_sysfs_sensor(struct text_object *obj, char *p, int p_max_size)
1069 {
1070         double r;
1071         struct sysfs *sf = obj->data.opaque;
1072
1073         if (!sf)
1074                 return;
1075
1076         r = get_sysfs_info(&sf->fd, sf->arg,
1077                         sf->devtype, sf->type);
1078
1079         r = r * sf->factor + sf->offset;
1080
1081         if (!strncmp(sf->type, "temp", 4)) {
1082                 temp_print(p, p_max_size, r, TEMP_CELSIUS);
1083         } else if (r >= 100.0 || r == 0) {
1084                 snprintf(p, p_max_size, "%d", (int) r);
1085         } else {
1086                 snprintf(p, p_max_size, "%.1f", r);
1087         }
1088 }
1089
1090 void free_sysfs_sensor(struct text_object *obj)
1091 {
1092         struct sysfs *sf = obj->data.opaque;
1093
1094         if (!sf)
1095                 return;
1096
1097         close(sf->fd);
1098         free(obj->data.opaque);
1099         obj->data.opaque = NULL;
1100 }
1101
1102 #define CPUFREQ_PREFIX "/sys/devices/system/cpu"
1103 #define CPUFREQ_POSTFIX "cpufreq/scaling_cur_freq"
1104
1105 /* return system frequency in MHz (use divisor=1) or GHz (use divisor=1000) */
1106 char get_freq(char *p_client_buffer, size_t client_buffer_size,
1107                 const char *p_format, int divisor, unsigned int cpu)
1108 {
1109         FILE *f;
1110         static int rep = 0;
1111         char frequency[32];
1112         char s[256];
1113         double freq = 0;
1114
1115         if (!p_client_buffer || client_buffer_size <= 0 || !p_format
1116                         || divisor <= 0) {
1117                 return 0;
1118         }
1119
1120         if (!prefer_proc) {
1121                 char current_freq_file[128];
1122
1123                 snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu - 1,
1124                         CPUFREQ_POSTFIX);
1125                 f = fopen(current_freq_file, "r");
1126                 if (f) {
1127                         /* if there's a cpufreq /sys node, read the current frequency from
1128                          * this node and divide by 1000 to get Mhz. */
1129                         if (fgets(s, sizeof(s), f)) {
1130                                 s[strlen(s) - 1] = '\0';
1131                                 freq = strtod(s, NULL);
1132                         }
1133                         fclose(f);
1134                         snprintf(p_client_buffer, client_buffer_size, p_format,
1135                                 (freq / 1000) / divisor);
1136                         return 1;
1137                 }
1138         }
1139
1140         // open the CPU information file
1141         f = open_file("/proc/cpuinfo", &rep);
1142         if (!f) {
1143                 perror(PACKAGE_NAME": Failed to access '/proc/cpuinfo' at get_freq()");
1144                 return 0;
1145         }
1146
1147         // read the file
1148         while (fgets(s, sizeof(s), f) != NULL) {
1149
1150 #if defined(__i386) || defined(__x86_64)
1151                 // and search for the cpu mhz
1152                 if (strncmp(s, "cpu MHz", 7) == 0 && cpu == 0) {
1153 #else
1154 #if defined(__alpha)
1155                 // different on alpha
1156                 if (strncmp(s, "cycle frequency [Hz]", 20) == 0 && cpu == 0) {
1157 #else
1158                 // this is different on ppc for some reason
1159                 if (strncmp(s, "clock", 5) == 0 && cpu == 0) {
1160 #endif // defined(__alpha)
1161 #endif // defined(__i386) || defined(__x86_64)
1162
1163                         // copy just the number
1164                         strcpy(frequency, strchr(s, ':') + 2);
1165 #if defined(__alpha)
1166                         // strip " est.\n"
1167                         frequency[strlen(frequency) - 6] = '\0';
1168                         // kernel reports in Hz
1169                         freq = strtod(frequency, NULL) / 1000000;
1170 #else
1171                         // strip \n
1172                         frequency[strlen(frequency) - 1] = '\0';
1173                         freq = strtod(frequency, NULL);
1174 #endif
1175                         break;
1176                 }
1177                 if (strncmp(s, "processor", 9) == 0) {
1178                         cpu--;
1179                         continue;
1180                 }
1181         }
1182
1183         fclose(f);
1184         snprintf(p_client_buffer, client_buffer_size, p_format,
1185                 (float) freq / divisor);
1186         return 1;
1187 }
1188
1189 #define CPUFREQ_VOLTAGE "cpufreq/scaling_voltages"
1190
1191 /* /sys/devices/system/cpu/cpu0/cpufreq/scaling_voltages looks something
1192  * like this:
1193 # frequency voltage
1194 1800000 1340
1195 1600000 1292
1196 1400000 1100
1197 1200000 988
1198 1000000 1116
1199 800000 1004
1200 600000 988
1201  * Peter Tarjan (ptarjan@citromail.hu) */
1202
1203 /* return cpu voltage in mV (use divisor=1) or V (use divisor=1000) */
1204 char get_voltage(char *p_client_buffer, size_t client_buffer_size,
1205                 const char *p_format, int divisor, unsigned int cpu)
1206 {
1207         FILE *f;
1208         char s[256];
1209         int freq = 0;
1210         int voltage = 0;
1211         char current_freq_file[128];
1212         int freq_comp = 0;
1213
1214         /* build the voltage file name */
1215         cpu--;
1216         snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu,
1217                 CPUFREQ_POSTFIX);
1218
1219         if (!p_client_buffer || client_buffer_size <= 0 || !p_format
1220                         || divisor <= 0) {
1221                 return 0;
1222         }
1223
1224         /* read the current cpu frequency from the /sys node */
1225         f = fopen(current_freq_file, "r");
1226         if (f) {
1227                 if (fgets(s, sizeof(s), f)) {
1228                         s[strlen(s) - 1] = '\0';
1229                         freq = strtod(s, NULL);
1230                 }
1231                 fclose(f);
1232         } else {
1233                 fprintf(stderr, PACKAGE_NAME": Failed to access '%s' at ", current_freq_file);
1234                 perror("get_voltage()");
1235                 if (f) {
1236                         fclose(f);
1237                 }
1238                 return 0;
1239         }
1240
1241         snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu,
1242                 CPUFREQ_VOLTAGE);
1243
1244         /* use the current cpu frequency to find the corresponding voltage */
1245         f = fopen(current_freq_file, "r");
1246
1247         if (f) {
1248                 while (!feof(f)) {
1249                         char line[256];
1250
1251                         if (fgets(line, 255, f) == NULL) {
1252                                 break;
1253                         }
1254                         sscanf(line, "%d %d", &freq_comp, &voltage);
1255                         if (freq_comp == freq) {
1256                                 break;
1257                         }
1258                 }
1259                 fclose(f);
1260         } else {
1261                 fprintf(stderr, PACKAGE_NAME": Failed to access '%s' at ", current_freq_file);
1262                 perror("get_voltage()");
1263                 if (f) {
1264                         fclose(f);
1265                 }
1266                 return 0;
1267         }
1268         snprintf(p_client_buffer, client_buffer_size, p_format,
1269                 (float) voltage / divisor);
1270         return 1;
1271 }
1272
1273 #define ACPI_FAN_DIR "/proc/acpi/fan/"
1274
1275 void get_acpi_fan(char *p_client_buffer, size_t client_buffer_size)
1276 {
1277         static int rep = 0;
1278         char buf[256];
1279         char buf2[256];
1280         FILE *fp;
1281
1282         if (!p_client_buffer || client_buffer_size <= 0) {
1283                 return;
1284         }
1285
1286         /* yeah, slow... :/ */
1287         if (!get_first_file_in_a_directory(ACPI_FAN_DIR, buf, &rep)) {
1288                 snprintf(p_client_buffer, client_buffer_size, "no fans?");
1289                 return;
1290         }
1291
1292         snprintf(buf2, sizeof(buf2), "%s%s/state", ACPI_FAN_DIR, buf);
1293
1294         fp = open_file(buf2, &rep);
1295         if (!fp) {
1296                 snprintf(p_client_buffer, client_buffer_size,
1297                         "can't open fan's state file");
1298                 return;
1299         }
1300         memset(buf, 0, sizeof(buf));
1301         fscanf(fp, "%*s %99s", buf);
1302         fclose(fp);
1303
1304         snprintf(p_client_buffer, client_buffer_size, "%s", buf);
1305 }
1306
1307 #define SYSFS_AC_ADAPTER_DIR "/sys/class/power_supply/AC"
1308 #define ACPI_AC_ADAPTER_DIR "/proc/acpi/ac_adapter/"
1309 /* Linux 2.6.25 onwards ac adapter info is in
1310    /sys/class/power_supply/AC/
1311    On my system I get the following.
1312      /sys/class/power_supply/AC/uevent:
1313      PHYSDEVPATH=/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:01/PNP0C09:00/ACPI0003:00
1314      PHYSDEVBUS=acpi
1315      PHYSDEVDRIVER=ac
1316      POWER_SUPPLY_NAME=AC
1317      POWER_SUPPLY_TYPE=Mains
1318      POWER_SUPPLY_ONLINE=1
1319 */
1320
1321 void get_acpi_ac_adapter(char *p_client_buffer, size_t client_buffer_size)
1322 {
1323         static int rep = 0;
1324
1325         char buf[256];
1326         char buf2[256];
1327         FILE *fp;
1328
1329         if (!p_client_buffer || client_buffer_size <= 0) {
1330                 return;
1331         }
1332
1333         snprintf(buf2, sizeof(buf2), "%s/uevent", SYSFS_AC_ADAPTER_DIR);
1334         fp = open_file(buf2, &rep);
1335         if (fp) {
1336                 /* sysfs processing */
1337                 while (!feof(fp)) {
1338                         if (fgets(buf, sizeof(buf), fp) == NULL)
1339                                 break;
1340
1341                         if (strncmp(buf, "POWER_SUPPLY_ONLINE=", 20) == 0) {
1342                                 int online = 0;
1343                                 sscanf(buf, "POWER_SUPPLY_ONLINE=%d", &online);
1344                                 snprintf(p_client_buffer, client_buffer_size,
1345                                          "%s-line", (online ? "on" : "off"));
1346                                 break;
1347                         }
1348                 }
1349                 fclose(fp);
1350         } else {
1351                 /* yeah, slow... :/ */
1352                 if (!get_first_file_in_a_directory(ACPI_AC_ADAPTER_DIR, buf, &rep)) {
1353                         snprintf(p_client_buffer, client_buffer_size, "no ac_adapters?");
1354                         return;
1355                 }
1356
1357                 snprintf(buf2, sizeof(buf2), "%s%s/state", ACPI_AC_ADAPTER_DIR, buf);
1358
1359                 fp = open_file(buf2, &rep);
1360                 if (!fp) {
1361                         snprintf(p_client_buffer, client_buffer_size,
1362                                  "No ac adapter found.... where is it?");
1363                         return;
1364                 }
1365                 memset(buf, 0, sizeof(buf));
1366                 fscanf(fp, "%*s %99s", buf);
1367                 fclose(fp);
1368
1369                 snprintf(p_client_buffer, client_buffer_size, "%s", buf);
1370         }
1371 }
1372
1373 /*
1374 /proc/acpi/thermal_zone/THRM/cooling_mode
1375 cooling mode:            active
1376 /proc/acpi/thermal_zone/THRM/polling_frequency
1377 <polling disabled>
1378 /proc/acpi/thermal_zone/THRM/state
1379 state:                   ok
1380 /proc/acpi/thermal_zone/THRM/temperature
1381 temperature:             45 C
1382 /proc/acpi/thermal_zone/THRM/trip_points
1383 critical (S5):           73 C
1384 passive:                 73 C: tc1=4 tc2=3 tsp=40 devices=0xcdf6e6c0
1385 */
1386
1387 #define ACPI_THERMAL_DIR "/proc/acpi/thermal_zone/"
1388 #define ACPI_THERMAL_FORMAT "/proc/acpi/thermal_zone/%s/temperature"
1389
1390 int open_acpi_temperature(const char *name)
1391 {
1392         char path[256];
1393         char buf[256];
1394         int fd;
1395
1396         if (name == NULL || strcmp(name, "*") == 0) {
1397                 static int rep = 0;
1398
1399                 if (!get_first_file_in_a_directory(ACPI_THERMAL_DIR, buf, &rep)) {
1400                         return -1;
1401                 }
1402                 name = buf;
1403         }
1404
1405         snprintf(path, 255, ACPI_THERMAL_FORMAT, name);
1406
1407         fd = open(path, O_RDONLY);
1408         if (fd < 0) {
1409                 NORM_ERR("can't open '%s': %s", path, strerror(errno));
1410         }
1411
1412         return fd;
1413 }
1414
1415 static double last_acpi_temp;
1416 static double last_acpi_temp_time;
1417
1418 double get_acpi_temperature(int fd)
1419 {
1420         if (fd <= 0) {
1421                 return 0;
1422         }
1423
1424         /* don't update acpi temperature too often */
1425         if (current_update_time - last_acpi_temp_time < 11.32) {
1426                 return last_acpi_temp;
1427         }
1428         last_acpi_temp_time = current_update_time;
1429
1430         /* seek to beginning */
1431         lseek(fd, 0, SEEK_SET);
1432
1433         /* read */
1434         {
1435                 char buf[256];
1436                 int n;
1437
1438                 n = read(fd, buf, 255);
1439                 if (n < 0) {
1440                         NORM_ERR("can't read fd %d: %s", fd, strerror(errno));
1441                 } else {
1442                         buf[n] = '\0';
1443                         sscanf(buf, "temperature: %lf", &last_acpi_temp);
1444                 }
1445         }
1446
1447         return last_acpi_temp;
1448 }
1449
1450 /*
1451 hipo@lepakko hipo $ cat /proc/acpi/battery/BAT1/info
1452 present:                 yes
1453 design capacity:         4400 mAh
1454 last full capacity:      4064 mAh
1455 battery technology:      rechargeable
1456 design voltage:          14800 mV
1457 design capacity warning: 300 mAh
1458 design capacity low:     200 mAh
1459 capacity granularity 1:  32 mAh
1460 capacity granularity 2:  32 mAh
1461 model number:            02KT
1462 serial number:           16922
1463 battery type:            LION
1464 OEM info:                SANYO
1465 */
1466
1467 /*
1468 hipo@lepakko conky $ cat /proc/acpi/battery/BAT1/state
1469 present:                 yes
1470 capacity state:          ok
1471 charging state:          unknown
1472 present rate:            0 mA
1473 remaining capacity:      4064 mAh
1474 present voltage:         16608 mV
1475 */
1476
1477 /*
1478 2213<@jupet�kellari��> jupet@lagi-unstable:~$ cat /proc/apm
1479 2213<@jupet�kellari��> 1.16 1.2 0x03 0x01 0xff 0x10 -1% -1 ?
1480 2213<@jupet�kellari��> (-1 ollee ei akkua kiinni, koska akku on p�yd�ll�)
1481 2214<@jupet�kellari��> jupet@lagi-unstable:~$ cat /proc/apm
1482 2214<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x03 0x09 98% -1 ?
1483
1484 2238<@jupet�kellari��> 1.16 1.2 0x03 0x00 0x00 0x01 100% -1 ? ilman verkkovirtaa
1485 2239<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x00 0x01 99% -1 ? verkkovirralla
1486
1487 2240<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x03 0x09 100% -1 ? verkkovirralla ja monitori p��ll�
1488 2241<@jupet�kellari��> 1.16 1.2 0x03 0x00 0x00 0x01 99% -1 ? monitori p��ll� mutta ilman verkkovirtaa
1489 */
1490
1491 /* Kapil Hari Paranjape <kapil@imsc.res.in>
1492   Linux 2.6.24 onwards battery info is in
1493   /sys/class/power_supply/BAT0/
1494   On my system I get the following.
1495         /sys/class/power_supply/BAT0/uevent:
1496         PHYSDEVPATH=/devices/LNXSYSTM:00/device:00/PNP0A03:00/device:01/PNP0C09:00/PNP0C0A:00
1497         PHYSDEVBUS=acpi
1498         PHYSDEVDRIVER=battery
1499         POWER_SUPPLY_NAME=BAT0
1500         POWER_SUPPLY_TYPE=Battery
1501         POWER_SUPPLY_STATUS=Discharging
1502         POWER_SUPPLY_PRESENT=1
1503         POWER_SUPPLY_TECHNOLOGY=Li-ion
1504         POWER_SUPPLY_VOLTAGE_MIN_DESIGN=10800000
1505         POWER_SUPPLY_VOLTAGE_NOW=10780000
1506         POWER_SUPPLY_CURRENT_NOW=13970000
1507         POWER_SUPPLY_ENERGY_FULL_DESIGN=47510000
1508         POWER_SUPPLY_ENERGY_FULL=27370000
1509         POWER_SUPPLY_ENERGY_NOW=11810000
1510         POWER_SUPPLY_MODEL_NAME=IBM-92P1060
1511         POWER_SUPPLY_MANUFACTURER=Panasonic
1512   On some systems POWER_SUPPLY_ENERGY_* is replaced by POWER_SUPPLY_CHARGE_*
1513 */
1514
1515 #define SYSFS_BATTERY_BASE_PATH "/sys/class/power_supply"
1516 #define ACPI_BATTERY_BASE_PATH "/proc/acpi/battery"
1517 #define APM_PATH "/proc/apm"
1518 #define MAX_BATTERY_COUNT 4
1519
1520 static FILE *sysfs_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1521 static FILE *acpi_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1522 static FILE *apm_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1523
1524 static int batteries_initialized = 0;
1525 static char batteries[MAX_BATTERY_COUNT][32];
1526
1527 static int acpi_last_full[MAX_BATTERY_COUNT];
1528 static int acpi_design_capacity[MAX_BATTERY_COUNT];
1529
1530 /* e.g. "charging 75%" */
1531 static char last_battery_str[MAX_BATTERY_COUNT][64];
1532 /* e.g. "3h 15m" */
1533 static char last_battery_time_str[MAX_BATTERY_COUNT][64];
1534
1535 static double last_battery_time[MAX_BATTERY_COUNT];
1536
1537 static int last_battery_perct[MAX_BATTERY_COUNT];
1538 static double last_battery_perct_time[MAX_BATTERY_COUNT];
1539
1540 void init_batteries(void)
1541 {
1542         int idx;
1543
1544         if (batteries_initialized) {
1545                 return;
1546         }
1547 #ifdef HAVE_OPENMP
1548 #pragma omp parallel for schedule(dynamic,10)
1549 #endif /* HAVE_OPENMP */
1550         for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) {
1551                 batteries[idx][0] = '\0';
1552         }
1553         batteries_initialized = 1;
1554 }
1555
1556 int get_battery_idx(const char *bat)
1557 {
1558         int idx;
1559
1560         for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) {
1561                 if (!strlen(batteries[idx]) || !strcmp(batteries[idx], bat)) {
1562                         break;
1563                 }
1564         }
1565
1566         /* if not found, enter a new entry */
1567         if (!strlen(batteries[idx])) {
1568                 snprintf(batteries[idx], 31, "%s", bat);
1569         }
1570
1571         return idx;
1572 }
1573
1574 void set_return_value(char *buffer, unsigned int n, int item, int idx);
1575
1576 void get_battery_stuff(char *buffer, unsigned int n, const char *bat, int item)
1577 {
1578         static int idx, rep = 0, rep1 = 0, rep2 = 0;
1579         char acpi_path[128];
1580         char sysfs_path[128];
1581
1582         snprintf(acpi_path, 127, ACPI_BATTERY_BASE_PATH "/%s/state", bat);
1583         snprintf(sysfs_path, 127, SYSFS_BATTERY_BASE_PATH "/%s/uevent", bat);
1584
1585         init_batteries();
1586
1587         idx = get_battery_idx(bat);
1588
1589         /* don't update battery too often */
1590         if (current_update_time - last_battery_time[idx] < 29.5) {
1591                 set_return_value(buffer, n, item, idx);
1592                 return;
1593         }
1594
1595         last_battery_time[idx] = current_update_time;
1596
1597         memset(last_battery_str[idx], 0, sizeof(last_battery_str[idx]));
1598         memset(last_battery_time_str[idx], 0, sizeof(last_battery_time_str[idx]));
1599
1600         /* first try SYSFS if that fails try ACPI */
1601
1602         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1603                 sysfs_bat_fp[idx] = open_file(sysfs_path, &rep);
1604         }
1605
1606         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1607                 acpi_bat_fp[idx] = open_file(acpi_path, &rep1);
1608         }
1609
1610         if (sysfs_bat_fp[idx] != NULL) {
1611                 /* SYSFS */
1612                 int present_rate = -1;
1613                 int remaining_capacity = -1;
1614                 char charging_state[64];
1615                 char present[4];
1616
1617                 strcpy(charging_state, "unknown");
1618
1619                 while (!feof(sysfs_bat_fp[idx])) {
1620                         char buf[256];
1621                         if (fgets(buf, 256, sysfs_bat_fp[idx]) == NULL)
1622                                 break;
1623
1624                         /* let's just hope units are ok */
1625                         if (strncmp (buf, "POWER_SUPPLY_PRESENT=1", 22) == 0)
1626                                 strcpy(present, "yes");
1627                         else if (strncmp (buf, "POWER_SUPPLY_PRESENT=0", 22) == 0)
1628                                 strcpy(present, "no");
1629                         else if (strncmp (buf, "POWER_SUPPLY_STATUS=", 20) == 0)
1630                                 sscanf(buf, "POWER_SUPPLY_STATUS=%63s", charging_state);
1631                         /* present_rate is not the same as the
1632                         current flowing now but it is the same value
1633                         which was used in the past. so we continue
1634                         the tradition! */
1635                         else if (strncmp(buf, "POWER_SUPPLY_CURRENT_NOW=", 25) == 0)
1636                                 sscanf(buf, "POWER_SUPPLY_CURRENT_NOW=%d", &present_rate);
1637                         else if (strncmp(buf, "POWER_SUPPLY_ENERGY_NOW=", 24) == 0)
1638                                 sscanf(buf, "POWER_SUPPLY_ENERGY_NOW=%d", &remaining_capacity);
1639                         else if (strncmp(buf, "POWER_SUPPLY_ENERGY_FULL=", 25) == 0)
1640                                 sscanf(buf, "POWER_SUPPLY_ENERGY_FULL=%d", &acpi_last_full[idx]);
1641                         else if (strncmp(buf, "POWER_SUPPLY_CHARGE_NOW=", 24) == 0)
1642                                 sscanf(buf, "POWER_SUPPLY_CHARGE_NOW=%d", &remaining_capacity);
1643                         else if (strncmp(buf, "POWER_SUPPLY_CHARGE_FULL=", 25) == 0)
1644                                 sscanf(buf, "POWER_SUPPLY_CHARGE_FULL=%d", &acpi_last_full[idx]);
1645                 }
1646
1647                 fclose(sysfs_bat_fp[idx]);
1648                 sysfs_bat_fp[idx] = NULL;
1649
1650                 /* Hellf[i]re notes that remaining capacity can exceed acpi_last_full */
1651                 if (remaining_capacity > acpi_last_full[idx])
1652                         acpi_last_full[idx] = remaining_capacity;  /* normalize to 100% */
1653
1654                 /* not present */
1655                 if (strcmp(present, "No") == 0) {
1656                         strncpy(last_battery_str[idx], "not present", 64);
1657                 }
1658                 /* charging */
1659                 else if (strcmp(charging_state, "Charging") == 0) {
1660                         if (acpi_last_full[idx] != 0 && present_rate > 0) {
1661                                 /* e.g. charging 75% */
1662                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "charging %i%%",
1663                                         (int) (((float) remaining_capacity / acpi_last_full[idx]) * 100 ));
1664                                 /* e.g. 2h 37m */
1665                                 format_seconds(last_battery_time_str[idx], sizeof(last_battery_time_str[idx])-1,
1666                                               (long) (((float)(acpi_last_full[idx] - remaining_capacity) / present_rate) * 3600));
1667                         } else if (acpi_last_full[idx] != 0 && present_rate <= 0) {
1668                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "charging %d%%",
1669                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1670                                 snprintf(last_battery_time_str[idx],
1671                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1672                         } else {
1673                                 strncpy(last_battery_str[idx], "charging", sizeof(last_battery_str[idx])-1);
1674                                 snprintf(last_battery_time_str[idx],
1675                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1676                         }
1677                 }
1678                 /* discharging */
1679                 else if (strncmp(charging_state, "Discharging", 64) == 0) {
1680                         if (present_rate > 0) {
1681                                 /* e.g. discharging 35% */
1682                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "discharging %i%%",
1683                                         (int) (((float) remaining_capacity / acpi_last_full[idx]) * 100 ));
1684                                 /* e.g. 1h 12m */
1685                                 format_seconds(last_battery_time_str[idx], sizeof(last_battery_time_str[idx])-1,
1686                                               (long) (((float) remaining_capacity / present_rate) * 3600));
1687                         } else if (present_rate == 0) { /* Thanks to Nexox for this one */
1688                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "full");
1689                                 snprintf(last_battery_time_str[idx],
1690                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1691                         } else {
1692                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1,
1693                                         "discharging %d%%",
1694                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1695                                 snprintf(last_battery_time_str[idx],
1696                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1697                         }
1698                 }
1699                 /* charged */
1700                 /* thanks to Lukas Zapletal <lzap@seznam.cz> */
1701                 else if (strncmp(charging_state, "Charged", 64) == 0 || strncmp(charging_state, "Full", 64) == 0) {
1702                                 /* Below happens with the second battery on my X40,
1703                                  * when the second one is empty and the first one
1704                                  * being charged. */
1705                                 if (remaining_capacity == 0)
1706                                         strcpy(last_battery_str[idx], "empty");
1707                                 else
1708                                         strcpy(last_battery_str[idx], "charged");
1709                 }
1710                 /* unknown, probably full / AC */
1711                 else {
1712                         if (acpi_last_full[idx] != 0
1713                             && remaining_capacity != acpi_last_full[idx])
1714                                 snprintf(last_battery_str[idx], 64, "unknown %d%%",
1715                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1716                         else
1717                                 strncpy(last_battery_str[idx], "AC", 64);
1718                 }
1719         } else if (acpi_bat_fp[idx] != NULL) {
1720                 /* ACPI */
1721                 int present_rate = -1;
1722                 int remaining_capacity = -1;
1723                 char charging_state[64];
1724                 char present[4];
1725
1726                 /* read last full capacity if it's zero */
1727                 if (acpi_last_full[idx] == 0) {
1728                         static int rep3 = 0;
1729                         char path[128];
1730                         FILE *fp;
1731
1732                         snprintf(path, 127, ACPI_BATTERY_BASE_PATH "/%s/info", bat);
1733                         fp = open_file(path, &rep3);
1734                         if (fp != NULL) {
1735                                 while (!feof(fp)) {
1736                                         char b[256];
1737
1738                                         if (fgets(b, 256, fp) == NULL) {
1739                                                 break;
1740                                         }
1741                                         if (sscanf(b, "last full capacity: %d",
1742                                                                 &acpi_last_full[idx]) != 0) {
1743                                                 break;
1744                                         }
1745                                 }
1746
1747                                 fclose(fp);
1748                         }
1749                 }
1750
1751                 fseek(acpi_bat_fp[idx], 0, SEEK_SET);
1752
1753                 strcpy(charging_state, "unknown");
1754
1755                 while (!feof(acpi_bat_fp[idx])) {
1756                         char buf[256];
1757
1758                         if (fgets(buf, 256, acpi_bat_fp[idx]) == NULL) {
1759                                 break;
1760                         }
1761
1762                         /* let's just hope units are ok */
1763                         if (strncmp(buf, "present:", 8) == 0) {
1764                                 sscanf(buf, "present: %4s", present);
1765                         } else if (strncmp(buf, "charging state:", 15) == 0) {
1766                                 sscanf(buf, "charging state: %63s", charging_state);
1767                         } else if (strncmp(buf, "present rate:", 13) == 0) {
1768                                 sscanf(buf, "present rate: %d", &present_rate);
1769                         } else if (strncmp(buf, "remaining capacity:", 19) == 0) {
1770                                 sscanf(buf, "remaining capacity: %d", &remaining_capacity);
1771                         }
1772                 }
1773                 /* Hellf[i]re notes that remaining capacity can exceed acpi_last_full */
1774                 if (remaining_capacity > acpi_last_full[idx]) {
1775                         /* normalize to 100% */
1776                         acpi_last_full[idx] = remaining_capacity;
1777                 }
1778
1779                 /* not present */
1780                 if (strcmp(present, "no") == 0) {
1781                         strncpy(last_battery_str[idx], "not present", 64);
1782                         /* charging */
1783                 } else if (strcmp(charging_state, "charging") == 0) {
1784                         if (acpi_last_full[idx] != 0 && present_rate > 0) {
1785                                 /* e.g. charging 75% */
1786                                 snprintf(last_battery_str[idx],
1787                                                 sizeof(last_battery_str[idx]) - 1, "charging %i%%",
1788                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1789                                 /* e.g. 2h 37m */
1790                                 format_seconds(last_battery_time_str[idx],
1791                                                 sizeof(last_battery_time_str[idx]) - 1,
1792                                                 (long) (((acpi_last_full[idx] - remaining_capacity) *
1793                                                                 3600) / present_rate));
1794                         } else if (acpi_last_full[idx] != 0 && present_rate <= 0) {
1795                                 snprintf(last_battery_str[idx],
1796                                                 sizeof(last_battery_str[idx]) - 1, "charging %d%%",
1797                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1798                                 snprintf(last_battery_time_str[idx],
1799                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1800                         } else {
1801                                 strncpy(last_battery_str[idx], "charging",
1802                                                 sizeof(last_battery_str[idx]) - 1);
1803                                 snprintf(last_battery_time_str[idx],
1804                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1805                         }
1806                         /* discharging */
1807                 } else if (strncmp(charging_state, "discharging", 64) == 0) {
1808                         if (present_rate > 0) {
1809                                 /* e.g. discharging 35% */
1810                                 snprintf(last_battery_str[idx],
1811                                                 sizeof(last_battery_str[idx]) - 1, "discharging %i%%",
1812                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1813                                 /* e.g. 1h 12m */
1814                                 format_seconds(last_battery_time_str[idx],
1815                                                 sizeof(last_battery_time_str[idx]) - 1,
1816                                                 (long) ((remaining_capacity * 3600) / present_rate));
1817                         } else if (present_rate == 0) { /* Thanks to Nexox for this one */
1818                                 snprintf(last_battery_str[idx],
1819                                                 sizeof(last_battery_str[idx]) - 1, "full");
1820                                 snprintf(last_battery_time_str[idx],
1821                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1822                         } else {
1823                                 snprintf(last_battery_str[idx],
1824                                                 sizeof(last_battery_str[idx]) - 1, "discharging %d%%",
1825                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1826                                 snprintf(last_battery_time_str[idx],
1827                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1828                         }
1829                         /* charged */
1830                 } else if (strncmp(charging_state, "charged", 64) == 0) {
1831                         /* thanks to Lukas Zapletal <lzap@seznam.cz> */
1832                         /* Below happens with the second battery on my X40,
1833                          * when the second one is empty and the first one being charged. */
1834                         if (remaining_capacity == 0) {
1835                                 strcpy(last_battery_str[idx], "empty");
1836                         } else {
1837                                 strcpy(last_battery_str[idx], "charged");
1838                         }
1839                         /* unknown, probably full / AC */
1840                 } else {
1841                         if (strncmp(charging_state, "Full", 64) == 0) {
1842                                 strncpy(last_battery_str[idx], "full", 64);
1843                         } else if (acpi_last_full[idx] != 0
1844                                         && remaining_capacity != acpi_last_full[idx]) {
1845                                 snprintf(last_battery_str[idx], 64, "unknown %d%%",
1846                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1847                         } else {
1848                                 strncpy(last_battery_str[idx], "AC", 64);
1849                         }
1850                 }
1851                 fclose(acpi_bat_fp[idx]);
1852                 acpi_bat_fp[idx] = NULL;
1853         } else {
1854                 /* APM */
1855                 if (apm_bat_fp[idx] == NULL) {
1856                         apm_bat_fp[idx] = open_file(APM_PATH, &rep2);
1857                 }
1858
1859                 if (apm_bat_fp[idx] != NULL) {
1860                         unsigned int ac, status, flag;
1861                         int life;
1862
1863                         fscanf(apm_bat_fp[idx], "%*s %*s %*x %x   %x       %x     %d%%",
1864                                 &ac, &status, &flag, &life);
1865
1866                         if (life == -1) {
1867                                 /* could check now that there is ac */
1868                                 snprintf(last_battery_str[idx], 64, "AC");
1869
1870                         /* could check that status == 3 here? */
1871                         } else if (ac && life != 100) {
1872                                 snprintf(last_battery_str[idx], 64, "charging %d%%", life);
1873                         } else {
1874                                 snprintf(last_battery_str[idx], 64, "%d%%", life);
1875                         }
1876
1877                         /* it seemed to buffer it so file must be closed (or could use
1878                          * syscalls directly but I don't feel like coding it now) */
1879                         fclose(apm_bat_fp[idx]);
1880                         apm_bat_fp[idx] = NULL;
1881                 }
1882         }
1883         set_return_value(buffer, n, item, idx);
1884 }
1885
1886 void set_return_value(char *buffer, unsigned int n, int item, int idx)
1887 {
1888         switch (item) {
1889                 case BATTERY_STATUS:
1890                         snprintf(buffer, n, "%s", last_battery_str[idx]);
1891                         break;
1892                 case BATTERY_TIME:
1893                         snprintf(buffer, n, "%s", last_battery_time_str[idx]);
1894                         break;
1895                 default:
1896                         break;
1897         }
1898 }
1899
1900 void get_battery_short_status(char *buffer, unsigned int n, const char *bat)
1901 {
1902         get_battery_stuff(buffer, n, bat, BATTERY_STATUS);
1903         if (0 == strncmp("charging", buffer, 8)) {
1904                 buffer[0] = 'C';
1905                 memmove(buffer + 1, buffer + 8, n - 8);
1906         } else if (0 == strncmp("discharging", buffer, 11)) {
1907                 buffer[0] = 'D';
1908                 memmove(buffer + 1, buffer + 11, n - 11);
1909         } else if (0 == strncmp("charged", buffer, 7)) {
1910                 buffer[0] = 'F';
1911                 memmove(buffer + 1, buffer + 7, n - 7);
1912         } else if (0 == strncmp("not present", buffer, 11)) {
1913                 buffer[0] = 'N';
1914                 memmove(buffer + 1, buffer + 11, n - 11);
1915         } else if (0 == strncmp("empty", buffer, 5)) {
1916                 buffer[0] = 'E';
1917                 memmove(buffer + 1, buffer + 5, n - 5);
1918         } else if (0 != strncmp("AC", buffer, 2)) {
1919                 buffer[0] = 'U';
1920                 memmove(buffer + 1, buffer + 11, n - 11);
1921         }
1922 }
1923
1924 int get_battery_perct(const char *bat)
1925 {
1926         static int rep = 0;
1927         int idx;
1928         char acpi_path[128];
1929         char sysfs_path[128];
1930         int remaining_capacity = -1;
1931
1932         snprintf(acpi_path, 127, ACPI_BATTERY_BASE_PATH "/%s/state", bat);
1933         snprintf(sysfs_path, 127, SYSFS_BATTERY_BASE_PATH "/%s/uevent", bat);
1934
1935         init_batteries();
1936
1937         idx = get_battery_idx(bat);
1938
1939         /* don't update battery too often */
1940         if (current_update_time - last_battery_perct_time[idx] < 30) {
1941                 return last_battery_perct[idx];
1942         }
1943         last_battery_perct_time[idx] = current_update_time;
1944
1945         /* Only check for SYSFS or ACPI */
1946
1947         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1948                 sysfs_bat_fp[idx] = open_file(sysfs_path, &rep);
1949                 rep = 0;
1950         }
1951
1952         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1953                 acpi_bat_fp[idx] = open_file(acpi_path, &rep);
1954         }
1955
1956         if (sysfs_bat_fp[idx] != NULL) {
1957                 /* SYSFS */
1958                 while (!feof(sysfs_bat_fp[idx])) {
1959                         char buf[256];
1960                         if (fgets(buf, 256, sysfs_bat_fp[idx]) == NULL)
1961                                 break;
1962
1963                         if (strncmp(buf, "POWER_SUPPLY_CHARGE_NOW=", 24) == 0) {
1964                                 sscanf(buf, "POWER_SUPPLY_CHARGE_NOW=%d", &remaining_capacity);
1965                         } else if (strncmp(buf, "POWER_SUPPLY_CHARGE_FULL=",25) == 0) {
1966                                 sscanf(buf, "POWER_SUPPLY_CHARGE_FULL=%d", &acpi_design_capacity[idx]);
1967                         } else if (strncmp(buf, "POWER_SUPPLY_ENERGY_NOW=", 24) == 0) {
1968                                 sscanf(buf, "POWER_SUPPLY_ENERGY_NOW=%d", &remaining_capacity);
1969                         } else if (strncmp(buf, "POWER_SUPPLY_ENERGY_FULL=",25) == 0) {
1970                                 sscanf(buf, "POWER_SUPPLY_ENERGY_FULL=%d", &acpi_design_capacity[idx]);
1971                         }
1972                 }
1973
1974                 fclose(sysfs_bat_fp[idx]);
1975                 sysfs_bat_fp[idx] = NULL;
1976
1977         } else if (acpi_bat_fp[idx] != NULL) {
1978                 /* ACPI */
1979                 /* read last full capacity if it's zero */
1980                 if (acpi_design_capacity[idx] == 0) {
1981                         static int rep2;
1982                         char path[128];
1983                         FILE *fp;
1984
1985                         snprintf(path, 127, ACPI_BATTERY_BASE_PATH "/%s/info", bat);
1986                         fp = open_file(path, &rep2);
1987                         if (fp != NULL) {
1988                                 while (!feof(fp)) {
1989                                         char b[256];
1990
1991                                         if (fgets(b, 256, fp) == NULL) {
1992                                                 break;
1993                                         }
1994                                         if (sscanf(b, "last full capacity: %d",
1995                                                                 &acpi_design_capacity[idx]) != 0) {
1996                                                 break;
1997                                         }
1998                                 }
1999                                 fclose(fp);
2000                         }
2001                 }
2002
2003                 fseek(acpi_bat_fp[idx], 0, SEEK_SET);
2004
2005                 while (!feof(acpi_bat_fp[idx])) {
2006                         char buf[256];
2007
2008                         if (fgets(buf, 256, acpi_bat_fp[idx]) == NULL) {
2009                                 break;
2010                         }
2011
2012                         if (buf[0] == 'r') {
2013                                 sscanf(buf, "remaining capacity: %d", &remaining_capacity);
2014                         }
2015                 }
2016         }
2017         if (remaining_capacity < 0) {
2018                 return 0;
2019         }
2020         /* compute the battery percentage */
2021         last_battery_perct[idx] =
2022                 (int) (((float) remaining_capacity / acpi_design_capacity[idx]) * 100);
2023         if (last_battery_perct[idx] > 100) last_battery_perct[idx] = 100;
2024         return last_battery_perct[idx];
2025 }
2026
2027 int get_battery_perct_bar(const char *bar)
2028 {
2029         int idx;
2030
2031         get_battery_perct(bar);
2032         idx = get_battery_idx(bar);
2033         return (int) (last_battery_perct[idx] * 2.56 - 1);
2034 }
2035
2036 /* On Apple powerbook and ibook:
2037 $ cat /proc/pmu/battery_0
2038 flags      : 00000013
2039 charge     : 3623
2040 max_charge : 3720
2041 current    : 388
2042 voltage    : 16787
2043 time rem.  : 900
2044 $ cat /proc/pmu/info
2045 PMU driver version     : 2
2046 PMU firmware version   : 0c
2047 AC Power               : 1
2048 Battery count          : 1
2049 */
2050
2051 /* defines as in <linux/pmu.h> */
2052 #define PMU_BATT_PRESENT                0x00000001
2053 #define PMU_BATT_CHARGING               0x00000002
2054
2055 static FILE *pmu_battery_fp;
2056 static FILE *pmu_info_fp;
2057 static char pb_battery_info[3][32];
2058 static double pb_battery_info_update;
2059
2060 #define PMU_PATH "/proc/pmu"
2061 void get_powerbook_batt_info(char *buffer, size_t n, int i)
2062 {
2063         static int rep = 0;
2064         const char *batt_path = PMU_PATH "/battery_0";
2065         const char *info_path = PMU_PATH "/info";
2066         unsigned int flags;
2067         int charge, max_charge, ac = -1;
2068         long timeval = -1;
2069
2070         /* don't update battery too often */
2071         if (current_update_time - pb_battery_info_update < 29.5) {
2072                 snprintf(buffer, n, "%s", pb_battery_info[i]);
2073                 return;
2074         }
2075         pb_battery_info_update = current_update_time;
2076
2077         if (pmu_battery_fp == NULL) {
2078                 pmu_battery_fp = open_file(batt_path, &rep);
2079                 if (pmu_battery_fp == NULL) {
2080                         return;
2081                 }
2082         }
2083
2084         if (pmu_battery_fp != NULL) {
2085                 rewind(pmu_battery_fp);
2086                 while (!feof(pmu_battery_fp)) {
2087                         char buf[32];
2088
2089                         if (fgets(buf, sizeof(buf), pmu_battery_fp) == NULL) {
2090                                 break;
2091                         }
2092
2093                         if (buf[0] == 'f') {
2094                                 sscanf(buf, "flags      : %8x", &flags);
2095                         } else if (buf[0] == 'c' && buf[1] == 'h') {
2096                                 sscanf(buf, "charge     : %d", &charge);
2097                         } else if (buf[0] == 'm') {
2098                                 sscanf(buf, "max_charge : %d", &max_charge);
2099                         } else if (buf[0] == 't') {
2100                                 sscanf(buf, "time rem.  : %ld", &timeval);
2101                         }
2102                 }
2103         }
2104         if (pmu_info_fp == NULL) {
2105                 pmu_info_fp = open_file(info_path, &rep);
2106                 if (pmu_info_fp == NULL) {
2107                         return;
2108                 }
2109         }
2110
2111         if (pmu_info_fp != NULL) {
2112                 rewind(pmu_info_fp);
2113                 while (!feof(pmu_info_fp)) {
2114                         char buf[32];
2115
2116                         if (fgets(buf, sizeof(buf), pmu_info_fp) == NULL) {
2117                                 break;
2118                         }
2119                         if (buf[0] == 'A') {
2120                                 sscanf(buf, "AC Power               : %d", &ac);
2121                         }
2122                 }
2123         }
2124         /* update status string */
2125         if ((ac && !(flags & PMU_BATT_PRESENT))) {
2126                 strncpy(pb_battery_info[PB_BATT_STATUS], "AC", sizeof(pb_battery_info[PB_BATT_STATUS]));
2127         } else if (ac && (flags & PMU_BATT_PRESENT)
2128                         && !(flags & PMU_BATT_CHARGING)) {
2129                 strncpy(pb_battery_info[PB_BATT_STATUS], "charged", sizeof(pb_battery_info[PB_BATT_STATUS]));
2130         } else if ((flags & PMU_BATT_PRESENT) && (flags & PMU_BATT_CHARGING)) {
2131                 strncpy(pb_battery_info[PB_BATT_STATUS], "charging", sizeof(pb_battery_info[PB_BATT_STATUS]));
2132         } else {
2133                 strncpy(pb_battery_info[PB_BATT_STATUS], "discharging", sizeof(pb_battery_info[PB_BATT_STATUS]));
2134         }
2135
2136         /* update percentage string */
2137         if (timeval == 0 && ac && (flags & PMU_BATT_PRESENT)
2138                         && !(flags & PMU_BATT_CHARGING)) {
2139                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2140                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "100%%");
2141         } else if (timeval == 0) {
2142                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2143                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "unknown");
2144         } else {
2145                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2146                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "%d%%",
2147                         (charge * 100) / max_charge);
2148         }
2149
2150         /* update time string */
2151         if (timeval == 0) {                     /* fully charged or battery not present */
2152                 snprintf(pb_battery_info[PB_BATT_TIME],
2153                         sizeof(pb_battery_info[PB_BATT_TIME]), "unknown");
2154         } else if (timeval < 60 * 60) { /* don't show secs */
2155                 format_seconds_short(pb_battery_info[PB_BATT_TIME],
2156                         sizeof(pb_battery_info[PB_BATT_TIME]), timeval);
2157         } else {
2158                 format_seconds(pb_battery_info[PB_BATT_TIME],
2159                         sizeof(pb_battery_info[PB_BATT_TIME]), timeval);
2160         }
2161
2162         snprintf(buffer, n, "%s", pb_battery_info[i]);
2163 }
2164
2165 void update_top(void)
2166 {
2167         process_find_top(info.cpu, info.memu, info.time
2168 #ifdef IOSTATS
2169                 , info.io
2170 #endif
2171                 );
2172         info.first_process = get_first_process();
2173 }
2174
2175 #define ENTROPY_AVAIL_PATH "/proc/sys/kernel/random/entropy_avail"
2176
2177 int get_entropy_avail(unsigned int *val)
2178 {
2179         static int rep = 0;
2180         FILE *fp;
2181
2182         if (!(fp = open_file(ENTROPY_AVAIL_PATH, &rep)))
2183                 return 1;
2184
2185         if (fscanf(fp, "%u", val) != 1)
2186                 return 1;
2187
2188         fclose(fp);
2189         return 0;
2190 }
2191
2192 #define ENTROPY_POOLSIZE_PATH "/proc/sys/kernel/random/poolsize"
2193
2194 int get_entropy_poolsize(unsigned int *val)
2195 {
2196         static int rep = 0;
2197         FILE *fp;
2198
2199         if (!(fp = open_file(ENTROPY_POOLSIZE_PATH, &rep)))
2200                 return 1;
2201
2202         if (fscanf(fp, "%u", val) != 1)
2203                 return 1;
2204
2205         fclose(fp);
2206         return 0;
2207 }
2208
2209 const char *get_disk_protect_queue(const char *disk)
2210 {
2211         FILE *fp;
2212         char path[128];
2213         int state;
2214
2215         snprintf(path, 127, "/sys/block/%s/device/unload_heads", disk);
2216         if (access(path, F_OK)) {
2217                 snprintf(path, 127, "/sys/block/%s/queue/protect", disk);
2218         }
2219         if ((fp = fopen(path, "r")) == NULL)
2220                 return "n/a   ";
2221         if (fscanf(fp, "%d\n", &state) != 1) {
2222                 fclose(fp);
2223                 return "failed";
2224         }
2225         fclose(fp);
2226         return (state > 0) ? "frozen" : "free  ";
2227 }
2228
2229 void update_diskio(void)
2230 {
2231         FILE *fp;
2232         static int rep = 0;
2233         char buf[512], devbuf[64];
2234         unsigned int major, minor;
2235         int col_count = 0;
2236         struct diskio_stat *cur;
2237         unsigned int reads, writes;
2238         unsigned int total_reads = 0, total_writes = 0;
2239
2240         stats.current = 0;
2241         stats.current_read = 0;
2242         stats.current_write = 0;
2243
2244         if (!(fp = open_file("/proc/diskstats", &rep))) {
2245                 return;
2246         }
2247
2248         /* read reads and writes from all disks (minor = 0), including cd-roms
2249          * and floppies, and sum them up */
2250         while (fgets(buf, 512, fp)) {
2251                 col_count = sscanf(buf, "%u %u %s %*u %*u %u %*u %*u %*u %u", &major,
2252                         &minor, devbuf, &reads, &writes);
2253                 /* ignore subdevices (they have only 3 matching entries in their line)
2254                  * and virtual devices (LVM, network block devices, RAM disks, Loopback)
2255                  *
2256                  * XXX: ignore devices which are part of a SW RAID (MD_MAJOR) */
2257                 if (col_count == 5 && major != LVM_BLK_MAJOR && major != NBD_MAJOR
2258                                 && major != RAMDISK_MAJOR && major != LOOP_MAJOR) {
2259                         total_reads += reads;
2260                         total_writes += writes;
2261                 } else {
2262                         col_count = sscanf(buf, "%u %u %s %*u %u %*u %u",
2263                                 &major, &minor, devbuf, &reads, &writes);
2264                         if (col_count != 5) {
2265                                 continue;
2266                         }
2267                 }
2268                 cur = stats.next;
2269                 while (cur && strcmp(devbuf, cur->dev))
2270                         cur = cur->next;
2271
2272                 if (cur)
2273                         update_diskio_values(cur, reads, writes);
2274         }
2275         update_diskio_values(&stats, total_reads, total_writes);
2276         fclose(fp);
2277 }