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

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