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                 ns->recv_speed = curtmp1 / (double) info.net_avg_samples;
 468                 ns->trans_speed = curtmp2 / (double) info.net_avg_samples;
 469                 if (info.net_avg_samples > 1) {
 470 #ifdef HAVE_OPENMP
 471 #pragma omp parallel for schedule(dynamic,10)
 472 #endif /* HAVE_OPENMP */
 473                         for (i = info.net_avg_samples; i > 1; i--) {
 474                                 ns->net_rec[i - 1] = ns->net_rec[i - 2];
 475                                 ns->net_trans[i - 1] = ns->net_trans[i - 2];
 476                         }
 477                 }
 478
 479 #ifdef HAVE_IWLIB
 480                 /* update wireless info */
 481                 winfo = malloc(sizeof(struct wireless_info));
 482                 memset(winfo, 0, sizeof(struct wireless_info));
 483
 484                 skfd = iw_sockets_open();
 485                 if (iw_get_basic_config(skfd, s, &(winfo->b)) > -1) {
 486
 487                         // set present winfo variables
 488                         if (iw_get_stats(skfd, s, &(winfo->stats),
 489                                         &winfo->range, winfo->has_range) >= 0) {
 490                                 winfo->has_stats = 1;
 491                         }
 492                         if (iw_get_range_info(skfd, s, &(winfo->range)) >= 0) {
 493                                 winfo->has_range = 1;
 494                         }
 495                         if (iw_get_ext(skfd, s, SIOCGIWAP, &wrq) >= 0) {
 496                                 winfo->has_ap_addr = 1;
 497                                 memcpy(&(winfo->ap_addr), &(wrq.u.ap_addr), sizeof(sockaddr));
 498                         }
 499
 500                         // get bitrate
 501                         if (iw_get_ext(skfd, s, SIOCGIWRATE, &wrq) >= 0) {
 502                                 memcpy(&(winfo->bitrate), &(wrq.u.bitrate), sizeof(iwparam));
 503                                 iw_print_bitrate(ns->bitrate, 16, winfo->bitrate.value);
 504                                 has_bitrate = 1;
 505                         }
 506
 507                         // get link quality
 508                         if (winfo->has_range && winfo->has_stats
 509                                         && ((winfo->stats.qual.level != 0)
 510                                         || (winfo->stats.qual.updated & IW_QUAL_DBM))) {
 511                                 if (!(winfo->stats.qual.updated & IW_QUAL_QUAL_INVALID)) {
 512                                         ns->link_qual = winfo->stats.qual.qual;
 513                                         ns->link_qual_max = winfo->range.max_qual.qual;
 514                                 }
 515                         }
 516
 517                         // get ap mac
 518                         if (winfo->has_ap_addr) {
 519                                 iw_sawap_ntop(&winfo->ap_addr, ns->ap);
 520                         }
 521
 522                         // get essid
 523                         if (winfo->b.has_essid) {
 524                                 if (winfo->b.essid_on) {
 525                                         snprintf(ns->essid, 32, "%s", winfo->b.essid);
 526                                 } else {
 527                                         snprintf(ns->essid, 32, "off/any");
 528                                 }
 529                         }
 530
 531                         snprintf(ns->mode, 16, "%s", iw_operation_mode[winfo->b.mode]);
 532                 }
 533                 iw_sockets_close(skfd);
 534                 free(winfo);
 535 #endif
 536         }
 537         first = 0;
 538
 539         fclose(net_dev_fp);
 540 }
 541
 542 int result;
 543
 544 void update_total_processes(void)
 545 {
 546         DIR *dir;
 547         struct dirent *entry;
 548         int ignore1;
 549         char ignore2;
 550
 551         info.procs = 0;
 552         if (!(dir = opendir("/proc"))) {
 553                 return;
 554         }
 555         while ((entry = readdir(dir))) {
 556                 if (!entry) {
 557                         /* Problem reading list of processes */
 558                         closedir(dir);
 559                         info.procs = 0;
 560                         return;
 561                 }
 562                 if (sscanf(entry->d_name, "%d%c", &ignore1, &ignore2) == 1) {
 563                         info.procs++;
 564                 }
 565         }
 566         closedir(dir);
 567 }
 568
 569 void update_threads(void)
 570 {
 571 #ifdef HAVE_SYSINFO
 572         if (!prefer_proc) {
 573                 struct sysinfo s_info;
 574
 575                 sysinfo(&s_info);
 576                 info.threads = s_info.procs;
 577         } else
 578 #endif
 579         {
 580                 static int rep = 0;
 581                 FILE *fp;
 582
 583                 if (!(fp = open_file("/proc/loadavg", &rep))) {
 584                         info.threads = 0;
 585                         return;
 586                 }
 587                 fscanf(fp, "%*f %*f %*f %*d/%hu", &info.threads);
 588                 fclose(fp);
 589         }
 590 }
 591
 592 #define CPU_SAMPLE_COUNT 15
 593 struct cpu_info {
 594         unsigned long long cpu_user;
 595         unsigned long long cpu_system;
 596         unsigned long long cpu_nice;
 597         unsigned long long cpu_idle;
 598         unsigned long long cpu_iowait;
 599         unsigned long long cpu_irq;
 600         unsigned long long cpu_softirq;
 601         unsigned long long cpu_steal;
 602         unsigned long long cpu_total;
 603         unsigned long long cpu_active_total;
 604         unsigned long long cpu_last_total;
 605         unsigned long long cpu_last_active_total;
 606         double cpu_val[CPU_SAMPLE_COUNT];
 607 };
 608 static short cpu_setup = 0;
 609
 610 /* Determine if this kernel gives us "extended" statistics information in
 611  * /proc/stat.
 612  * Kernels around 2.5 and earlier only reported user, system, nice, and
 613  * idle values in proc stat.
 614  * Kernels around 2.6 and greater report these PLUS iowait, irq, softirq,
 615  * and steal */
 616 void determine_longstat(char *buf)
 617 {
 618         unsigned long long iowait = 0;
 619
 620         KFLAG_SETOFF(KFLAG_IS_LONGSTAT);
 621         /* scanf will either return -1 or 1 because there is only 1 assignment */
 622         if (sscanf(buf, "%*s %*d %*d %*d %*d %llu", &iowait) > 0) {
 623                 KFLAG_SETON(KFLAG_IS_LONGSTAT);
 624         }
 625 }
 626
 627 void get_cpu_count(void)
 628 {
 629         FILE *stat_fp;
 630         static int rep = 0;
 631         char buf[256];
 632
 633         if (info.cpu_usage) {
 634                 return;
 635         }
 636
 637         if (!(stat_fp = open_file("/proc/stat", &rep))) {
 638                 return;
 639         }
 640
 641         info.cpu_count = 0;
 642
 643         while (!feof(stat_fp)) {
 644                 if (fgets(buf, 255, stat_fp) == NULL) {
 645                         break;
 646                 }
 647
 648                 if (strncmp(buf, "cpu", 3) == 0 && isdigit(buf[3])) {
 649                         if (info.cpu_count == 0) {
 650                                 determine_longstat(buf);
 651                         }
 652                         info.cpu_count++;
 653                 }
 654         }
 655         info.cpu_usage = malloc((info.cpu_count + 1) * sizeof(float));
 656
 657         fclose(stat_fp);
 658 }
 659
 660 #define TMPL_LONGSTAT "%*s %llu %llu %llu %llu %llu %llu %llu %llu"
 661 #define TMPL_SHORTSTAT "%*s %llu %llu %llu %llu"
 662
 663 void update_stat(void)
 664 {
 665         FILE *stat_fp;
 666         static int rep = 0;
 667         static struct cpu_info *cpu = NULL;
 668         char buf[256];
 669         int i;
 670         unsigned int idx;
 671         double curtmp;
 672         const char *stat_template = NULL;
 673         unsigned int malloc_cpu_size = 0;
 674         extern void* global_cpu;
 675         static double last_stat_update = 0.0;
 676
 677         /* since we use wrappers for this function, the update machinery
 678          * can't eliminate double invocations of this function. Check for
 679          * them here, otherwise cpu_usage counters are freaking out. */
 680         if (last_stat_update == current_update_time)
 681                 return;
 682         last_stat_update = current_update_time;
 683
 684         /* add check for !info.cpu_usage since that mem is freed on a SIGUSR1 */
 685         if (!cpu_setup || !info.cpu_usage) {
 686                 get_cpu_count();
 687                 cpu_setup = 1;
 688         }
 689
 690         if (!stat_template) {
 691                 stat_template =
 692                         KFLAG_ISSET(KFLAG_IS_LONGSTAT) ? TMPL_LONGSTAT : TMPL_SHORTSTAT;
 693         }
 694
 695         if (!global_cpu) {
 696                 malloc_cpu_size = (info.cpu_count + 1) * sizeof(struct cpu_info);
 697                 cpu = malloc(malloc_cpu_size);
 698                 memset(cpu, 0, malloc_cpu_size);
 699                 global_cpu = cpu;
 700         }
 701
 702         if (!(stat_fp = open_file("/proc/stat", &rep))) {
 703                 info.run_threads = 0;
 704                 if (info.cpu_usage) {
 705                         memset(info.cpu_usage, 0, info.cpu_count * sizeof(float));
 706                 }
 707                 return;
 708         }
 709
 710         idx = 0;
 711         while (!feof(stat_fp)) {
 712                 if (fgets(buf, 255, stat_fp) == NULL) {
 713                         break;
 714                 }
 715
 716                 if (strncmp(buf, "procs_running ", 14) == 0) {
 717                         sscanf(buf, "%*s %hu", &info.run_threads);
 718                 } else if (strncmp(buf, "cpu", 3) == 0) {
 719                         double delta;
 720                         if (isdigit(buf[3])) {
 721                                 idx = atoi(&buf[3]) + 1;
 722                         } else {
 723                                 idx = 0;
 724                         }
 725                         sscanf(buf, stat_template, &(cpu[idx].cpu_user),
 726                                 &(cpu[idx].cpu_nice), &(cpu[idx].cpu_system),
 727                                 &(cpu[idx].cpu_idle), &(cpu[idx].cpu_iowait),
 728                                 &(cpu[idx].cpu_irq), &(cpu[idx].cpu_softirq),
 729                                 &(cpu[idx].cpu_steal));
 730
 731                         cpu[idx].cpu_total = cpu[idx].cpu_user + cpu[idx].cpu_nice +
 732                                 cpu[idx].cpu_system + cpu[idx].cpu_idle +
 733                                 cpu[idx].cpu_iowait + cpu[idx].cpu_irq +
 734                                 cpu[idx].cpu_softirq + cpu[idx].cpu_steal;
 735
 736                         cpu[idx].cpu_active_total = cpu[idx].cpu_total -
 737                                 (cpu[idx].cpu_idle + cpu[idx].cpu_iowait);
 738
 739                         delta = current_update_time - last_update_time;
 740
 741                         if (delta <= 0.001) {
 742                                 break;
 743                         }
 744
 745                         cpu[idx].cpu_val[0] = (cpu[idx].cpu_active_total -
 746                                 cpu[idx].cpu_last_active_total) /
 747                                 (float) (cpu[idx].cpu_total - cpu[idx].cpu_last_total);
 748                         curtmp = 0;
 749 #ifdef HAVE_OPENMP
 750 #pragma omp parallel for reduction(+:curtmp) schedule(dynamic,10)
 751 #endif /* HAVE_OPENMP */
 752                         for (i = 0; i < info.cpu_avg_samples; i++) {
 753                                 curtmp = curtmp + cpu[idx].cpu_val[i];
 754                         }
 755                         /* TESTING -- I've removed this, because I don't think it is right.
 756                          * You shouldn't divide by the cpu count here ...
 757                          * removing for testing */
 758                         /* if (idx == 0) {
 759                                 info.cpu_usage[idx] = curtmp / info.cpu_avg_samples /
 760                                         info.cpu_count;
 761                         } else {
 762                                 info.cpu_usage[idx] = curtmp / info.cpu_avg_samples;
 763                         } */
 764                         /* TESTING -- this line replaces the prev. "suspect" if/else */
 765                         info.cpu_usage[idx] = curtmp / info.cpu_avg_samples;
 766
 767                         cpu[idx].cpu_last_total = cpu[idx].cpu_total;
 768                         cpu[idx].cpu_last_active_total = cpu[idx].cpu_active_total;
 769 #ifdef HAVE_OPENMP
 770 #pragma omp parallel for schedule(dynamic,10)
 771 #endif /* HAVE_OPENMP */
 772                         for (i = info.cpu_avg_samples - 1; i > 0; i--) {
 773                                 cpu[idx].cpu_val[i] = cpu[idx].cpu_val[i - 1];
 774                         }
 775                 }
 776         }
 777         fclose(stat_fp);
 778 }
 779
 780 void update_running_processes(void)
 781 {
 782         update_stat();
 783 }
 784
 785 void update_cpu_usage(void)
 786 {
 787         update_stat();
 788 }
 789
 790 void update_load_average(void)
 791 {
 792 #ifdef HAVE_GETLOADAVG
 793         if (!prefer_proc) {
 794                 double v[3];
 795
 796                 getloadavg(v, 3);
 797                 info.loadavg[0] = (float) v[0];
 798                 info.loadavg[1] = (float) v[1];
 799                 info.loadavg[2] = (float) v[2];
 800         } else
 801 #endif
 802         {
 803                 static int rep = 0;
 804                 FILE *fp;
 805
 806                 if (!(fp = open_file("/proc/loadavg", &rep))) {
 807                         info.loadavg[0] = info.loadavg[1] = info.loadavg[2] = 0.0;
 808                         return;
 809                 }
 810                 fscanf(fp, "%f %f %f", &info.loadavg[0], &info.loadavg[1],
 811                         &info.loadavg[2]);
 812                 fclose(fp);
 813         }
 814 }
 815
 816 /***********************************************************/
 817 /***********************************************************/
 818 /***********************************************************/
 819
 820 static int no_dots(const struct dirent *d)
 821 {
 822         if (d->d_name[0] == '.') {
 823                 return 0;
 824         }
 825         return 1;
 826 }
 827
 828 static int get_first_file_in_a_directory(const char *dir, char *s, int *rep)
 829 {
 830         struct dirent **namelist;
 831         int i, n;
 832
 833         n = scandir(dir, &namelist, no_dots, alphasort);
 834         if (n < 0) {
 835                 if (!rep || !*rep) {
 836                         NORM_ERR("scandir for %s: %s", dir, strerror(errno));
 837                         if (rep) {
 838                                 *rep = 1;
 839                         }
 840                 }
 841                 return 0;
 842         } else {
 843                 if (n == 0) {
 844                         return 0;
 845                 }
 846
 847                 strncpy(s, namelist[0]->d_name, 255);
 848                 s[255] = '\0';
 849
 850 #ifdef HAVE_OPENMP
 851 #pragma omp parallel for schedule(dynamic,10)
 852 #endif /* HAVE_OPENMP */
 853                 for (i = 0; i < n; i++) {
 854                         free(namelist[i]);
 855                 }
 856                 free(namelist);
 857
 858                 return 1;
 859         }
 860 }
 861
 862 static int open_sysfs_sensor(const char *dir, const char *dev, const char *type, int n,
 863                 int *divisor, char *devtype)
 864 {
 865         char path[256];
 866         char buf[256];
 867         int fd;
 868         int divfd;
 869
 870         memset(buf, 0, sizeof(buf));
 871
 872         /* if device is NULL or *, get first */
 873         if (dev == NULL || strcmp(dev, "*") == 0) {
 874                 static int rep = 0;
 875
 876                 if (!get_first_file_in_a_directory(dir, buf, &rep)) {
 877                         return -1;
 878                 }
 879                 dev = buf;
 880         }
 881
 882         if (strcmp(dir, "/sys/class/hwmon/") == 0) {
 883                 if (*buf) {
 884                         /* buf holds result from get_first_file_in_a_directory() above,
 885                          * e.g. "hwmon0" -- append "/device" */
 886                         strcat(buf, "/device");
 887                 } else {
 888                         /* dev holds device number N as a string,
 889                          * e.g. "0", -- convert to "hwmon0/device" */
 890                         sprintf(buf, "hwmon%s/device", dev);
 891                         dev = buf;
 892                 }
 893         }
 894
 895         /* change vol to in, tempf to temp */
 896         if (strcmp(type, "vol") == 0) {
 897                 type = "in";
 898         } else if (strcmp(type, "tempf") == 0) {
 899                 type = "temp";
 900         }
 901
 902         /* construct path */
 903         snprintf(path, 255, "%s%s/%s%d_input", dir, dev, type, n);
 904
 905         /* first, attempt to open file in /device */
 906         fd = open(path, O_RDONLY);
 907         if (fd < 0) {
 908
 909                 /* if it fails, strip the /device from dev and attempt again */
 910                 buf[strlen(buf) - 7] = 0;
 911                 snprintf(path, 255, "%s%s/%s%d_input", dir, dev, type, n);
 912                 fd = open(path, O_RDONLY);
 913                 if (fd < 0) {
 914                         CRIT_ERR(NULL, NULL, "can't open '%s': %s\nplease check your device or remove this "
 915                                          "var from "PACKAGE_NAME, path, strerror(errno));
 916                 }
 917         }
 918
 919         strncpy(devtype, path, 255);
 920
 921         if (strcmp(type, "in") == 0 || strcmp(type, "temp") == 0
 922                         || strcmp(type, "tempf") == 0) {
 923                 *divisor = 1;
 924         } else {
 925                 *divisor = 0;
 926         }
 927         /* fan does not use *_div as a read divisor */
 928         if (strcmp("fan", type) == 0) {
 929                 return fd;
 930         }
 931
 932         /* test if *_div file exist, open it and use it as divisor */
 933         if (strcmp(type, "tempf") == 0) {
 934                 snprintf(path, 255, "%s%s/%s%d_div", dir, "one", "two", n);
 935         } else {
 936                 snprintf(path, 255, "%s%s/%s%d_div", dir, dev, type, n);
 937         }
 938
 939         divfd = open(path, O_RDONLY);
 940         if (divfd > 0) {
 941                 /* read integer */
 942                 char divbuf[64];
 943                 int divn;
 944
 945                 divn = read(divfd, divbuf, 63);
 946                 /* should read until n == 0 but I doubt that kernel will give these
 947                  * in multiple pieces. :) */
 948                 if (divn < 0) {
 949                         NORM_ERR("open_sysfs_sensor(): can't read from sysfs");
 950                 } else {
 951                         divbuf[divn] = '\0';
 952                         *divisor = atoi(divbuf);
 953                 }
 954                 close(divfd);
 955         }
 956
 957         return fd;
 958 }
 959
 960 static double get_sysfs_info(int *fd, int divisor, char *devtype, char *type)
 961 {
 962         int val = 0;
 963
 964         if (*fd <= 0) {
 965                 return 0;
 966         }
 967
 968         lseek(*fd, 0, SEEK_SET);
 969
 970         /* read integer */
 971         {
 972                 char buf[64];
 973                 int n;
 974                 n = read(*fd, buf, 63);
 975                 /* should read until n == 0 but I doubt that kernel will give these
 976                  * in multiple pieces. :) */
 977                 if (n < 0) {
 978                         NORM_ERR("get_sysfs_info(): read from %s failed\n", devtype);
 979                 } else {
 980                         buf[n] = '\0';
 981                         val = atoi(buf);
 982                 }
 983         }
 984
 985         close(*fd);
 986         /* open file */
 987         *fd = open(devtype, O_RDONLY);
 988         if (*fd < 0) {
 989                 NORM_ERR("can't open '%s': %s", devtype, strerror(errno));
 990         }
 991
 992         /* My dirty hack for computing CPU value
 993          * Filedil, from forums.gentoo.org */
 994         /* if (strstr(devtype, "temp1_input") != NULL) {
 995                 return -15.096 + 1.4893 * (val / 1000.0);
 996         } */
 997
 998         /* divide voltage and temperature by 1000 */
 999         /* or if any other divisor is given, use that */
1000         if (strcmp(type, "tempf") == 0) {
1001                 if (divisor > 1) {
1002                         return ((val / divisor + 40) * 9.0 / 5) - 40;
1003                 } else if (divisor) {
1004                         return ((val / 1000.0 + 40) * 9.0 / 5) - 40;
1005                 } else {
1006                         return ((val + 40) * 9.0 / 5) - 40;
1007                 }
1008         } else {
1009                 if (divisor > 1) {
1010                         return val / divisor;
1011                 } else if (divisor) {
1012                         return val / 1000.0;
1013                 } else {
1014                         return val;
1015                 }
1016         }
1017 }
1018
1019 #define HWMON_RESET() {\
1020                 buf1[0] = 0; \
1021                 factor = 1.0; \
1022                 offset = 0.0; }
1023
1024 static void parse_sysfs_sensor(struct text_object *obj, const char *arg, const char *path, const char *type)
1025 {
1026         char buf1[64], buf2[64];
1027         float factor, offset;
1028         int n, found = 0;
1029         struct sysfs *sf;
1030
1031         if (sscanf(arg, "%63s %d %f %f", buf2, &n, &factor, &offset) == 4) found = 1; else HWMON_RESET();
1032         if (!found && sscanf(arg, "%63s %63s %d %f %f", buf1, buf2, &n, &factor, &offset) == 5) found = 1; else if (!found) HWMON_RESET();
1033         if (!found && sscanf(arg, "%63s %63s %d", buf1, buf2, &n) == 3) found = 1; else if (!found) HWMON_RESET();
1034         if (!found && sscanf(arg, "%63s %d", buf2, &n) == 2) found = 1; else if (!found) HWMON_RESET();
1035
1036         if (!found) {
1037                 NORM_ERR("i2c failed to parse arguments");
1038                 obj->type = OBJ_text;
1039                 return;
1040         }
1041         DBGP("parsed %s args: '%s' '%s' %d %f %f\n", type, buf1, buf2, n, factor, offset);
1042         sf = malloc(sizeof(struct sysfs));
1043         memset(sf, 0, sizeof(struct sysfs));
1044         sf->fd = open_sysfs_sensor(path, (*buf1) ? buf1 : 0, buf2, n,
1045                         &sf->arg, sf->devtype);
1046         strncpy(sf->type, buf2, 63);
1047         sf->factor = factor;
1048         sf->offset = offset;
1049         obj->data.opaque = sf;
1050 }
1051
1052 #define PARSER_GENERATOR(name, path)                                \
1053 void parse_##name##_sensor(struct text_object *obj, const char *arg) \
1054 {                                                                   \
1055         parse_sysfs_sensor(obj, arg, path, #name);           \
1056 }
1057
1058 PARSER_GENERATOR(i2c, "/sys/bus/i2c/devices/")
1059 PARSER_GENERATOR(hwmon, "/sys/class/hwmon/")
1060 PARSER_GENERATOR(platform, "/sys/bus/platform/devices/")
1061
1062 void print_sysfs_sensor(struct text_object *obj, char *p, int p_max_size)
1063 {
1064         double r;
1065         struct sysfs *sf = obj->data.opaque;
1066
1067         if (!sf)
1068                 return;
1069
1070         r = get_sysfs_info(&sf->fd, sf->arg,
1071                         sf->devtype, sf->type);
1072
1073         r = r * sf->factor + sf->offset;
1074
1075         if (!strncmp(sf->type, "temp", 4)) {
1076                 temp_print(p, p_max_size, r, TEMP_CELSIUS);
1077         } else if (r >= 100.0 || r == 0) {
1078                 snprintf(p, p_max_size, "%d", (int) r);
1079         } else {
1080                 snprintf(p, p_max_size, "%.1f", r);
1081         }
1082 }
1083
1084 void free_sysfs_sensor(struct text_object *obj)
1085 {
1086         struct sysfs *sf = obj->data.opaque;
1087
1088         if (!sf)
1089                 return;
1090
1091         close(sf->fd);
1092         free(obj->data.opaque);
1093         obj->data.opaque = NULL;
1094 }
1095
1096 #define CPUFREQ_PREFIX "/sys/devices/system/cpu"
1097 #define CPUFREQ_POSTFIX "cpufreq/scaling_cur_freq"
1098
1099 /* return system frequency in MHz (use divisor=1) or GHz (use divisor=1000) */
1100 char get_freq(char *p_client_buffer, size_t client_buffer_size,
1101                 const char *p_format, int divisor, unsigned int cpu)
1102 {
1103         FILE *f;
1104         static int rep = 0;
1105         char frequency[32];
1106         char s[256];
1107         double freq = 0;
1108
1109         if (!p_client_buffer || client_buffer_size <= 0 || !p_format
1110                         || divisor <= 0) {
1111                 return 0;
1112         }
1113
1114         if (!prefer_proc) {
1115                 char current_freq_file[128];
1116
1117                 snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu - 1,
1118                         CPUFREQ_POSTFIX);
1119                 f = fopen(current_freq_file, "r");
1120                 if (f) {
1121                         /* if there's a cpufreq /sys node, read the current frequency from
1122                          * this node and divide by 1000 to get Mhz. */
1123                         if (fgets(s, sizeof(s), f)) {
1124                                 s[strlen(s) - 1] = '\0';
1125                                 freq = strtod(s, NULL);
1126                         }
1127                         fclose(f);
1128                         snprintf(p_client_buffer, client_buffer_size, p_format,
1129                                 (freq / 1000) / divisor);
1130                         return 1;
1131                 }
1132         }
1133
1134         // open the CPU information file
1135         f = open_file("/proc/cpuinfo", &rep);
1136         if (!f) {
1137                 perror(PACKAGE_NAME": Failed to access '/proc/cpuinfo' at get_freq()");
1138                 return 0;
1139         }
1140
1141         // read the file
1142         while (fgets(s, sizeof(s), f) != NULL) {
1143
1144 #if defined(__i386) || defined(__x86_64)
1145                 // and search for the cpu mhz
1146                 if (strncmp(s, "cpu MHz", 7) == 0 && cpu == 0) {
1147 #else
1148 #if defined(__alpha)
1149                 // different on alpha
1150                 if (strncmp(s, "cycle frequency [Hz]", 20) == 0 && cpu == 0) {
1151 #else
1152                 // this is different on ppc for some reason
1153                 if (strncmp(s, "clock", 5) == 0 && cpu == 0) {
1154 #endif // defined(__alpha)
1155 #endif // defined(__i386) || defined(__x86_64)
1156
1157                         // copy just the number
1158                         strcpy(frequency, strchr(s, ':') + 2);
1159 #if defined(__alpha)
1160                         // strip " est.\n"
1161                         frequency[strlen(frequency) - 6] = '\0';
1162                         // kernel reports in Hz
1163                         freq = strtod(frequency, NULL) / 1000000;
1164 #else
1165                         // strip \n
1166                         frequency[strlen(frequency) - 1] = '\0';
1167                         freq = strtod(frequency, NULL);
1168 #endif
1169                         break;
1170                 }
1171                 if (strncmp(s, "processor", 9) == 0) {
1172                         cpu--;
1173                         continue;
1174                 }
1175         }
1176
1177         fclose(f);
1178         snprintf(p_client_buffer, client_buffer_size, p_format,
1179                 (float) freq / divisor);
1180         return 1;
1181 }
1182
1183 #define CPUFREQ_VOLTAGE "cpufreq/scaling_voltages"
1184
1185 /* /sys/devices/system/cpu/cpu0/cpufreq/scaling_voltages looks something
1186  * like this:
1187 # frequency voltage
1188 1800000 1340
1189 1600000 1292
1190 1400000 1100
1191 1200000 988
1192 1000000 1116
1193 800000 1004
1194 600000 988
1195  * Peter Tarjan (ptarjan@citromail.hu) */
1196
1197 /* return cpu voltage in mV (use divisor=1) or V (use divisor=1000) */
1198 static char get_voltage(char *p_client_buffer, size_t client_buffer_size,
1199                 const char *p_format, int divisor, unsigned int cpu)
1200 {
1201         FILE *f;
1202         char s[256];
1203         int freq = 0;
1204         int voltage = 0;
1205         char current_freq_file[128];
1206         int freq_comp = 0;
1207
1208         /* build the voltage file name */
1209         cpu--;
1210         snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu,
1211                 CPUFREQ_POSTFIX);
1212
1213         if (!p_client_buffer || client_buffer_size <= 0 || !p_format
1214                         || divisor <= 0) {
1215                 return 0;
1216         }
1217
1218         /* read the current cpu frequency from the /sys node */
1219         f = fopen(current_freq_file, "r");
1220         if (f) {
1221                 if (fgets(s, sizeof(s), f)) {
1222                         s[strlen(s) - 1] = '\0';
1223                         freq = strtod(s, NULL);
1224                 }
1225                 fclose(f);
1226         } else {
1227                 fprintf(stderr, PACKAGE_NAME": Failed to access '%s' at ", current_freq_file);
1228                 perror("get_voltage()");
1229                 if (f) {
1230                         fclose(f);
1231                 }
1232                 return 0;
1233         }
1234
1235         snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu,
1236                 CPUFREQ_VOLTAGE);
1237
1238         /* use the current cpu frequency to find the corresponding voltage */
1239         f = fopen(current_freq_file, "r");
1240
1241         if (f) {
1242                 while (!feof(f)) {
1243                         char line[256];
1244
1245                         if (fgets(line, 255, f) == NULL) {
1246                                 break;
1247                         }
1248                         sscanf(line, "%d %d", &freq_comp, &voltage);
1249                         if (freq_comp == freq) {
1250                                 break;
1251                         }
1252                 }
1253                 fclose(f);
1254         } else {
1255                 fprintf(stderr, PACKAGE_NAME": Failed to access '%s' at ", current_freq_file);
1256                 perror("get_voltage()");
1257                 if (f) {
1258                         fclose(f);
1259                 }
1260                 return 0;
1261         }
1262         snprintf(p_client_buffer, client_buffer_size, p_format,
1263                 (float) voltage / divisor);
1264         return 1;
1265 }
1266
1267 void print_voltage_mv(struct text_object *obj, char *p, int p_max_size)
1268 {
1269         static int ok = 1;
1270         if (ok) {
1271                 ok = get_voltage(p, p_max_size, "%.0f", 1, obj->data.i);
1272         }
1273 }
1274
1275 void print_voltage_v(struct text_object *obj, char *p, int p_max_size)
1276 {
1277         static int ok = 1;
1278         if (ok) {
1279                 ok = get_voltage(p, p_max_size, "%'.3f", 1000, obj->data.i);
1280         }
1281 }
1282
1283 #define ACPI_FAN_DIR "/proc/acpi/fan/"
1284
1285 void get_acpi_fan(char *p_client_buffer, size_t client_buffer_size)
1286 {
1287         static int rep = 0;
1288         char buf[256];
1289         char buf2[256];
1290         FILE *fp;
1291
1292         if (!p_client_buffer || client_buffer_size <= 0) {
1293                 return;
1294         }
1295
1296         /* yeah, slow... :/ */
1297         if (!get_first_file_in_a_directory(ACPI_FAN_DIR, buf, &rep)) {
1298                 snprintf(p_client_buffer, client_buffer_size, "no fans?");
1299                 return;
1300         }
1301
1302         snprintf(buf2, sizeof(buf2), "%s%s/state", ACPI_FAN_DIR, buf);
1303
1304         fp = open_file(buf2, &rep);
1305         if (!fp) {
1306                 snprintf(p_client_buffer, client_buffer_size,
1307                         "can't open fan's state file");
1308                 return;
1309         }
1310         memset(buf, 0, sizeof(buf));
1311         fscanf(fp, "%*s %99s", buf);
1312         fclose(fp);
1313
1314         snprintf(p_client_buffer, client_buffer_size, "%s", buf);
1315 }
1316
1317 #define SYSFS_AC_ADAPTER_DIR "/sys/class/power_supply/AC"
1318 #define ACPI_AC_ADAPTER_DIR "/proc/acpi/ac_adapter/"
1319 /* Linux 2.6.25 onwards ac adapter info is in
1320    /sys/class/power_supply/AC/
1321    On my system I get the following.
1322      /sys/class/power_supply/AC/uevent:
1323      PHYSDEVPATH=/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:01/PNP0C09:00/ACPI0003:00
1324      PHYSDEVBUS=acpi
1325      PHYSDEVDRIVER=ac
1326      POWER_SUPPLY_NAME=AC
1327      POWER_SUPPLY_TYPE=Mains
1328      POWER_SUPPLY_ONLINE=1
1329 */
1330
1331 void get_acpi_ac_adapter(char *p_client_buffer, size_t client_buffer_size)
1332 {
1333         static int rep = 0;
1334
1335         char buf[256];
1336         char buf2[256];
1337         FILE *fp;
1338
1339         if (!p_client_buffer || client_buffer_size <= 0) {
1340                 return;
1341         }
1342
1343         snprintf(buf2, sizeof(buf2), "%s/uevent", SYSFS_AC_ADAPTER_DIR);
1344         fp = open_file(buf2, &rep);
1345         if (fp) {
1346                 /* sysfs processing */
1347                 while (!feof(fp)) {
1348                         if (fgets(buf, sizeof(buf), fp) == NULL)
1349                                 break;
1350
1351                         if (strncmp(buf, "POWER_SUPPLY_ONLINE=", 20) == 0) {
1352                                 int online = 0;
1353                                 sscanf(buf, "POWER_SUPPLY_ONLINE=%d", &online);
1354                                 snprintf(p_client_buffer, client_buffer_size,
1355                                          "%s-line", (online ? "on" : "off"));
1356                                 break;
1357                         }
1358                 }
1359                 fclose(fp);
1360         } else {
1361                 /* yeah, slow... :/ */
1362                 if (!get_first_file_in_a_directory(ACPI_AC_ADAPTER_DIR, buf, &rep)) {
1363                         snprintf(p_client_buffer, client_buffer_size, "no ac_adapters?");
1364                         return;
1365                 }
1366
1367                 snprintf(buf2, sizeof(buf2), "%s%s/state", ACPI_AC_ADAPTER_DIR, buf);
1368
1369                 fp = open_file(buf2, &rep);
1370                 if (!fp) {
1371                         snprintf(p_client_buffer, client_buffer_size,
1372                                  "No ac adapter found.... where is it?");
1373                         return;
1374                 }
1375                 memset(buf, 0, sizeof(buf));
1376                 fscanf(fp, "%*s %99s", buf);
1377                 fclose(fp);
1378
1379                 snprintf(p_client_buffer, client_buffer_size, "%s", buf);
1380         }
1381 }
1382
1383 /*
1384 /proc/acpi/thermal_zone/THRM/cooling_mode
1385 cooling mode:            active
1386 /proc/acpi/thermal_zone/THRM/polling_frequency
1387 <polling disabled>
1388 /proc/acpi/thermal_zone/THRM/state
1389 state:                   ok
1390 /proc/acpi/thermal_zone/THRM/temperature
1391 temperature:             45 C
1392 /proc/acpi/thermal_zone/THRM/trip_points
1393 critical (S5):           73 C
1394 passive:                 73 C: tc1=4 tc2=3 tsp=40 devices=0xcdf6e6c0
1395 */
1396
1397 #define ACPI_THERMAL_DIR "/proc/acpi/thermal_zone/"
1398 #define ACPI_THERMAL_FORMAT "/proc/acpi/thermal_zone/%s/temperature"
1399
1400 int open_acpi_temperature(const char *name)
1401 {
1402         char path[256];
1403         char buf[256];
1404         int fd;
1405
1406         if (name == NULL || strcmp(name, "*") == 0) {
1407                 static int rep = 0;
1408
1409                 if (!get_first_file_in_a_directory(ACPI_THERMAL_DIR, buf, &rep)) {
1410                         return -1;
1411                 }
1412                 name = buf;
1413         }
1414
1415         snprintf(path, 255, ACPI_THERMAL_FORMAT, name);
1416
1417         fd = open(path, O_RDONLY);
1418         if (fd < 0) {
1419                 NORM_ERR("can't open '%s': %s", path, strerror(errno));
1420         }
1421
1422         return fd;
1423 }
1424
1425 static double last_acpi_temp;
1426 static double last_acpi_temp_time;
1427
1428 double get_acpi_temperature(int fd)
1429 {
1430         if (fd <= 0) {
1431                 return 0;
1432         }
1433
1434         /* don't update acpi temperature too often */
1435         if (current_update_time - last_acpi_temp_time < 11.32) {
1436                 return last_acpi_temp;
1437         }
1438         last_acpi_temp_time = current_update_time;
1439
1440         /* seek to beginning */
1441         lseek(fd, 0, SEEK_SET);
1442
1443         /* read */
1444         {
1445                 char buf[256];
1446                 int n;
1447
1448                 n = read(fd, buf, 255);
1449                 if (n < 0) {
1450                         NORM_ERR("can't read fd %d: %s", fd, strerror(errno));
1451                 } else {
1452                         buf[n] = '\0';
1453                         sscanf(buf, "temperature: %lf", &last_acpi_temp);
1454                 }
1455         }
1456
1457         return last_acpi_temp;
1458 }
1459
1460 /*
1461 hipo@lepakko hipo $ cat /proc/acpi/battery/BAT1/info
1462 present:                 yes
1463 design capacity:         4400 mAh
1464 last full capacity:      4064 mAh
1465 battery technology:      rechargeable
1466 design voltage:          14800 mV
1467 design capacity warning: 300 mAh
1468 design capacity low:     200 mAh
1469 capacity granularity 1:  32 mAh
1470 capacity granularity 2:  32 mAh
1471 model number:            02KT
1472 serial number:           16922
1473 battery type:            LION
1474 OEM info:                SANYO
1475 */
1476
1477 /*
1478 hipo@lepakko conky $ cat /proc/acpi/battery/BAT1/state
1479 present:                 yes
1480 capacity state:          ok
1481 charging state:          unknown
1482 present rate:            0 mA
1483 remaining capacity:      4064 mAh
1484 present voltage:         16608 mV
1485 */
1486
1487 /*
1488 2213<@jupet�kellari��> jupet@lagi-unstable:~$ cat /proc/apm
1489 2213<@jupet�kellari��> 1.16 1.2 0x03 0x01 0xff 0x10 -1% -1 ?
1490 2213<@jupet�kellari��> (-1 ollee ei akkua kiinni, koska akku on p�yd�ll�)
1491 2214<@jupet�kellari��> jupet@lagi-unstable:~$ cat /proc/apm
1492 2214<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x03 0x09 98% -1 ?
1493
1494 2238<@jupet�kellari��> 1.16 1.2 0x03 0x00 0x00 0x01 100% -1 ? ilman verkkovirtaa
1495 2239<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x00 0x01 99% -1 ? verkkovirralla
1496
1497 2240<@jupet�kellari��> 1.16 1.2 0x03 0x01 0x03 0x09 100% -1 ? verkkovirralla ja monitori p��ll�
1498 2241<@jupet�kellari��> 1.16 1.2 0x03 0x00 0x00 0x01 99% -1 ? monitori p��ll� mutta ilman verkkovirtaa
1499 */
1500
1501 /* Kapil Hari Paranjape <kapil@imsc.res.in>
1502   Linux 2.6.24 onwards battery info is in
1503   /sys/class/power_supply/BAT0/
1504   On my system I get the following.
1505         /sys/class/power_supply/BAT0/uevent:
1506         PHYSDEVPATH=/devices/LNXSYSTM:00/device:00/PNP0A03:00/device:01/PNP0C09:00/PNP0C0A:00
1507         PHYSDEVBUS=acpi
1508         PHYSDEVDRIVER=battery
1509         POWER_SUPPLY_NAME=BAT0
1510         POWER_SUPPLY_TYPE=Battery
1511         POWER_SUPPLY_STATUS=Discharging
1512         POWER_SUPPLY_PRESENT=1
1513         POWER_SUPPLY_TECHNOLOGY=Li-ion
1514         POWER_SUPPLY_VOLTAGE_MIN_DESIGN=10800000
1515         POWER_SUPPLY_VOLTAGE_NOW=10780000
1516         POWER_SUPPLY_CURRENT_NOW=13970000
1517         POWER_SUPPLY_ENERGY_FULL_DESIGN=47510000
1518         POWER_SUPPLY_ENERGY_FULL=27370000
1519         POWER_SUPPLY_ENERGY_NOW=11810000
1520         POWER_SUPPLY_MODEL_NAME=IBM-92P1060
1521         POWER_SUPPLY_MANUFACTURER=Panasonic
1522   On some systems POWER_SUPPLY_ENERGY_* is replaced by POWER_SUPPLY_CHARGE_*
1523 */
1524
1525 #define SYSFS_BATTERY_BASE_PATH "/sys/class/power_supply"
1526 #define ACPI_BATTERY_BASE_PATH "/proc/acpi/battery"
1527 #define APM_PATH "/proc/apm"
1528 #define MAX_BATTERY_COUNT 4
1529
1530 static FILE *sysfs_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1531 static FILE *acpi_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1532 static FILE *apm_bat_fp[MAX_BATTERY_COUNT] = { NULL, NULL, NULL, NULL };
1533
1534 static int batteries_initialized = 0;
1535 static char batteries[MAX_BATTERY_COUNT][32];
1536
1537 static int acpi_last_full[MAX_BATTERY_COUNT];
1538 static int acpi_design_capacity[MAX_BATTERY_COUNT];
1539
1540 /* e.g. "charging 75%" */
1541 static char last_battery_str[MAX_BATTERY_COUNT][64];
1542 /* e.g. "3h 15m" */
1543 static char last_battery_time_str[MAX_BATTERY_COUNT][64];
1544
1545 static double last_battery_time[MAX_BATTERY_COUNT];
1546
1547 static int last_battery_perct[MAX_BATTERY_COUNT];
1548 static double last_battery_perct_time[MAX_BATTERY_COUNT];
1549
1550 void init_batteries(void)
1551 {
1552         int idx;
1553
1554         if (batteries_initialized) {
1555                 return;
1556         }
1557 #ifdef HAVE_OPENMP
1558 #pragma omp parallel for schedule(dynamic,10)
1559 #endif /* HAVE_OPENMP */
1560         for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) {
1561                 batteries[idx][0] = '\0';
1562         }
1563         batteries_initialized = 1;
1564 }
1565
1566 int get_battery_idx(const char *bat)
1567 {
1568         int idx;
1569
1570         for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) {
1571                 if (!strlen(batteries[idx]) || !strcmp(batteries[idx], bat)) {
1572                         break;
1573                 }
1574         }
1575
1576         /* if not found, enter a new entry */
1577         if (!strlen(batteries[idx])) {
1578                 snprintf(batteries[idx], 31, "%s", bat);
1579         }
1580
1581         return idx;
1582 }
1583
1584 void set_return_value(char *buffer, unsigned int n, int item, int idx);
1585
1586 void get_battery_stuff(char *buffer, unsigned int n, const char *bat, int item)
1587 {
1588         static int idx, rep = 0, rep1 = 0, rep2 = 0;
1589         char acpi_path[128];
1590         char sysfs_path[128];
1591
1592         snprintf(acpi_path, 127, ACPI_BATTERY_BASE_PATH "/%s/state", bat);
1593         snprintf(sysfs_path, 127, SYSFS_BATTERY_BASE_PATH "/%s/uevent", bat);
1594
1595         init_batteries();
1596
1597         idx = get_battery_idx(bat);
1598
1599         /* don't update battery too often */
1600         if (current_update_time - last_battery_time[idx] < 29.5) {
1601                 set_return_value(buffer, n, item, idx);
1602                 return;
1603         }
1604
1605         last_battery_time[idx] = current_update_time;
1606
1607         memset(last_battery_str[idx], 0, sizeof(last_battery_str[idx]));
1608         memset(last_battery_time_str[idx], 0, sizeof(last_battery_time_str[idx]));
1609
1610         /* first try SYSFS if that fails try ACPI */
1611
1612         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1613                 sysfs_bat_fp[idx] = open_file(sysfs_path, &rep);
1614         }
1615
1616         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1617                 acpi_bat_fp[idx] = open_file(acpi_path, &rep1);
1618         }
1619
1620         if (sysfs_bat_fp[idx] != NULL) {
1621                 /* SYSFS */
1622                 int present_rate = -1;
1623                 int remaining_capacity = -1;
1624                 char charging_state[64];
1625                 char present[4];
1626
1627                 strcpy(charging_state, "unknown");
1628
1629                 while (!feof(sysfs_bat_fp[idx])) {
1630                         char buf[256];
1631                         if (fgets(buf, 256, sysfs_bat_fp[idx]) == NULL)
1632                                 break;
1633
1634                         /* let's just hope units are ok */
1635                         if (strncmp (buf, "POWER_SUPPLY_PRESENT=1", 22) == 0)
1636                                 strcpy(present, "yes");
1637                         else if (strncmp (buf, "POWER_SUPPLY_PRESENT=0", 22) == 0)
1638                                 strcpy(present, "no");
1639                         else if (strncmp (buf, "POWER_SUPPLY_STATUS=", 20) == 0)
1640                                 sscanf(buf, "POWER_SUPPLY_STATUS=%63s", charging_state);
1641                         /* present_rate is not the same as the
1642                         current flowing now but it is the same value
1643                         which was used in the past. so we continue
1644                         the tradition! */
1645                         else if (strncmp(buf, "POWER_SUPPLY_CURRENT_NOW=", 25) == 0)
1646                                 sscanf(buf, "POWER_SUPPLY_CURRENT_NOW=%d", &present_rate);
1647                         else if (strncmp(buf, "POWER_SUPPLY_ENERGY_NOW=", 24) == 0)
1648                                 sscanf(buf, "POWER_SUPPLY_ENERGY_NOW=%d", &remaining_capacity);
1649                         else if (strncmp(buf, "POWER_SUPPLY_ENERGY_FULL=", 25) == 0)
1650                                 sscanf(buf, "POWER_SUPPLY_ENERGY_FULL=%d", &acpi_last_full[idx]);
1651                         else if (strncmp(buf, "POWER_SUPPLY_CHARGE_NOW=", 24) == 0)
1652                                 sscanf(buf, "POWER_SUPPLY_CHARGE_NOW=%d", &remaining_capacity);
1653                         else if (strncmp(buf, "POWER_SUPPLY_CHARGE_FULL=", 25) == 0)
1654                                 sscanf(buf, "POWER_SUPPLY_CHARGE_FULL=%d", &acpi_last_full[idx]);
1655                 }
1656
1657                 fclose(sysfs_bat_fp[idx]);
1658                 sysfs_bat_fp[idx] = NULL;
1659
1660                 /* Hellf[i]re notes that remaining capacity can exceed acpi_last_full */
1661                 if (remaining_capacity > acpi_last_full[idx])
1662                         acpi_last_full[idx] = remaining_capacity;  /* normalize to 100% */
1663
1664                 /* not present */
1665                 if (strcmp(present, "No") == 0) {
1666                         strncpy(last_battery_str[idx], "not present", 64);
1667                 }
1668                 /* charging */
1669                 else if (strcmp(charging_state, "Charging") == 0) {
1670                         if (acpi_last_full[idx] != 0 && present_rate > 0) {
1671                                 /* e.g. charging 75% */
1672                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "charging %i%%",
1673                                         (int) (((float) remaining_capacity / acpi_last_full[idx]) * 100 ));
1674                                 /* e.g. 2h 37m */
1675                                 format_seconds(last_battery_time_str[idx], sizeof(last_battery_time_str[idx])-1,
1676                                               (long) (((float)(acpi_last_full[idx] - remaining_capacity) / present_rate) * 3600));
1677                         } else if (acpi_last_full[idx] != 0 && present_rate <= 0) {
1678                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "charging %d%%",
1679                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1680                                 snprintf(last_battery_time_str[idx],
1681                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1682                         } else {
1683                                 strncpy(last_battery_str[idx], "charging", sizeof(last_battery_str[idx])-1);
1684                                 snprintf(last_battery_time_str[idx],
1685                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1686                         }
1687                 }
1688                 /* discharging */
1689                 else if (strncmp(charging_state, "Discharging", 64) == 0) {
1690                         if (present_rate > 0) {
1691                                 /* e.g. discharging 35% */
1692                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "discharging %i%%",
1693                                         (int) (((float) remaining_capacity / acpi_last_full[idx]) * 100 ));
1694                                 /* e.g. 1h 12m */
1695                                 format_seconds(last_battery_time_str[idx], sizeof(last_battery_time_str[idx])-1,
1696                                               (long) (((float) remaining_capacity / present_rate) * 3600));
1697                         } else if (present_rate == 0) { /* Thanks to Nexox for this one */
1698                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1, "full");
1699                                 snprintf(last_battery_time_str[idx],
1700                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1701                         } else {
1702                                 snprintf(last_battery_str[idx], sizeof(last_battery_str[idx])-1,
1703                                         "discharging %d%%",
1704                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1705                                 snprintf(last_battery_time_str[idx],
1706                                         sizeof(last_battery_time_str[idx]) - 1, "unknown");
1707                         }
1708                 }
1709                 /* charged */
1710                 /* thanks to Lukas Zapletal <lzap@seznam.cz> */
1711                 else if (strncmp(charging_state, "Charged", 64) == 0 || strncmp(charging_state, "Full", 64) == 0) {
1712                                 /* Below happens with the second battery on my X40,
1713                                  * when the second one is empty and the first one
1714                                  * being charged. */
1715                                 if (remaining_capacity == 0)
1716                                         strcpy(last_battery_str[idx], "empty");
1717                                 else
1718                                         strcpy(last_battery_str[idx], "charged");
1719                 }
1720                 /* unknown, probably full / AC */
1721                 else {
1722                         if (acpi_last_full[idx] != 0
1723                             && remaining_capacity != acpi_last_full[idx])
1724                                 snprintf(last_battery_str[idx], 64, "unknown %d%%",
1725                                         (int) (((float)remaining_capacity / acpi_last_full[idx]) * 100));
1726                         else
1727                                 strncpy(last_battery_str[idx], "AC", 64);
1728                 }
1729         } else if (acpi_bat_fp[idx] != NULL) {
1730                 /* ACPI */
1731                 int present_rate = -1;
1732                 int remaining_capacity = -1;
1733                 char charging_state[64];
1734                 char present[4];
1735
1736                 /* read last full capacity if it's zero */
1737                 if (acpi_last_full[idx] == 0) {
1738                         static int rep3 = 0;
1739                         char path[128];
1740                         FILE *fp;
1741
1742                         snprintf(path, 127, ACPI_BATTERY_BASE_PATH "/%s/info", bat);
1743                         fp = open_file(path, &rep3);
1744                         if (fp != NULL) {
1745                                 while (!feof(fp)) {
1746                                         char b[256];
1747
1748                                         if (fgets(b, 256, fp) == NULL) {
1749                                                 break;
1750                                         }
1751                                         if (sscanf(b, "last full capacity: %d",
1752                                                                 &acpi_last_full[idx]) != 0) {
1753                                                 break;
1754                                         }
1755                                 }
1756
1757                                 fclose(fp);
1758                         }
1759                 }
1760
1761                 fseek(acpi_bat_fp[idx], 0, SEEK_SET);
1762
1763                 strcpy(charging_state, "unknown");
1764
1765                 while (!feof(acpi_bat_fp[idx])) {
1766                         char buf[256];
1767
1768                         if (fgets(buf, 256, acpi_bat_fp[idx]) == NULL) {
1769                                 break;
1770                         }
1771
1772                         /* let's just hope units are ok */
1773                         if (strncmp(buf, "present:", 8) == 0) {
1774                                 sscanf(buf, "present: %4s", present);
1775                         } else if (strncmp(buf, "charging state:", 15) == 0) {
1776                                 sscanf(buf, "charging state: %63s", charging_state);
1777                         } else if (strncmp(buf, "present rate:", 13) == 0) {
1778                                 sscanf(buf, "present rate: %d", &present_rate);
1779                         } else if (strncmp(buf, "remaining capacity:", 19) == 0) {
1780                                 sscanf(buf, "remaining capacity: %d", &remaining_capacity);
1781                         }
1782                 }
1783                 /* Hellf[i]re notes that remaining capacity can exceed acpi_last_full */
1784                 if (remaining_capacity > acpi_last_full[idx]) {
1785                         /* normalize to 100% */
1786                         acpi_last_full[idx] = remaining_capacity;
1787                 }
1788
1789                 /* not present */
1790                 if (strcmp(present, "no") == 0) {
1791                         strncpy(last_battery_str[idx], "not present", 64);
1792                         /* charging */
1793                 } else if (strcmp(charging_state, "charging") == 0) {
1794                         if (acpi_last_full[idx] != 0 && present_rate > 0) {
1795                                 /* e.g. charging 75% */
1796                                 snprintf(last_battery_str[idx],
1797                                                 sizeof(last_battery_str[idx]) - 1, "charging %i%%",
1798                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1799                                 /* e.g. 2h 37m */
1800                                 format_seconds(last_battery_time_str[idx],
1801                                                 sizeof(last_battery_time_str[idx]) - 1,
1802                                                 (long) (((acpi_last_full[idx] - remaining_capacity) *
1803                                                                 3600) / present_rate));
1804                         } else if (acpi_last_full[idx] != 0 && present_rate <= 0) {
1805                                 snprintf(last_battery_str[idx],
1806                                                 sizeof(last_battery_str[idx]) - 1, "charging %d%%",
1807                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1808                                 snprintf(last_battery_time_str[idx],
1809                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1810                         } else {
1811                                 strncpy(last_battery_str[idx], "charging",
1812                                                 sizeof(last_battery_str[idx]) - 1);
1813                                 snprintf(last_battery_time_str[idx],
1814                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1815                         }
1816                         /* discharging */
1817                 } else if (strncmp(charging_state, "discharging", 64) == 0) {
1818                         if (present_rate > 0) {
1819                                 /* e.g. discharging 35% */
1820                                 snprintf(last_battery_str[idx],
1821                                                 sizeof(last_battery_str[idx]) - 1, "discharging %i%%",
1822                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1823                                 /* e.g. 1h 12m */
1824                                 format_seconds(last_battery_time_str[idx],
1825                                                 sizeof(last_battery_time_str[idx]) - 1,
1826                                                 (long) ((remaining_capacity * 3600) / present_rate));
1827                         } else if (present_rate == 0) { /* Thanks to Nexox for this one */
1828                                 snprintf(last_battery_str[idx],
1829                                                 sizeof(last_battery_str[idx]) - 1, "full");
1830                                 snprintf(last_battery_time_str[idx],
1831                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1832                         } else {
1833                                 snprintf(last_battery_str[idx],
1834                                                 sizeof(last_battery_str[idx]) - 1, "discharging %d%%",
1835                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1836                                 snprintf(last_battery_time_str[idx],
1837                                                 sizeof(last_battery_time_str[idx]) - 1, "unknown");
1838                         }
1839                         /* charged */
1840                 } else if (strncmp(charging_state, "charged", 64) == 0) {
1841                         /* thanks to Lukas Zapletal <lzap@seznam.cz> */
1842                         /* Below happens with the second battery on my X40,
1843                          * when the second one is empty and the first one being charged. */
1844                         if (remaining_capacity == 0) {
1845                                 strcpy(last_battery_str[idx], "empty");
1846                         } else {
1847                                 strcpy(last_battery_str[idx], "charged");
1848                         }
1849                         /* unknown, probably full / AC */
1850                 } else {
1851                         if (strncmp(charging_state, "Full", 64) == 0) {
1852                                 strncpy(last_battery_str[idx], "full", 64);
1853                         } else if (acpi_last_full[idx] != 0
1854                                         && remaining_capacity != acpi_last_full[idx]) {
1855                                 snprintf(last_battery_str[idx], 64, "unknown %d%%",
1856                                                 (int) ((remaining_capacity * 100) / acpi_last_full[idx]));
1857                         } else {
1858                                 strncpy(last_battery_str[idx], "AC", 64);
1859                         }
1860                 }
1861                 fclose(acpi_bat_fp[idx]);
1862                 acpi_bat_fp[idx] = NULL;
1863         } else {
1864                 /* APM */
1865                 if (apm_bat_fp[idx] == NULL) {
1866                         apm_bat_fp[idx] = open_file(APM_PATH, &rep2);
1867                 }
1868
1869                 if (apm_bat_fp[idx] != NULL) {
1870                         unsigned int ac, status, flag;
1871                         int life;
1872
1873                         fscanf(apm_bat_fp[idx], "%*s %*s %*x %x   %x       %x     %d%%",
1874                                 &ac, &status, &flag, &life);
1875
1876                         if (life == -1) {
1877                                 /* could check now that there is ac */
1878                                 snprintf(last_battery_str[idx], 64, "AC");
1879
1880                         /* could check that status == 3 here? */
1881                         } else if (ac && life != 100) {
1882                                 snprintf(last_battery_str[idx], 64, "charging %d%%", life);
1883                         } else {
1884                                 snprintf(last_battery_str[idx], 64, "%d%%", life);
1885                         }
1886
1887                         /* it seemed to buffer it so file must be closed (or could use
1888                          * syscalls directly but I don't feel like coding it now) */
1889                         fclose(apm_bat_fp[idx]);
1890                         apm_bat_fp[idx] = NULL;
1891                 }
1892         }
1893         set_return_value(buffer, n, item, idx);
1894 }
1895
1896 void set_return_value(char *buffer, unsigned int n, int item, int idx)
1897 {
1898         switch (item) {
1899                 case BATTERY_STATUS:
1900                         snprintf(buffer, n, "%s", last_battery_str[idx]);
1901                         break;
1902                 case BATTERY_TIME:
1903                         snprintf(buffer, n, "%s", last_battery_time_str[idx]);
1904                         break;
1905                 default:
1906                         break;
1907         }
1908 }
1909
1910 void get_battery_short_status(char *buffer, unsigned int n, const char *bat)
1911 {
1912         get_battery_stuff(buffer, n, bat, BATTERY_STATUS);
1913         if (0 == strncmp("charging", buffer, 8)) {
1914                 buffer[0] = 'C';
1915                 memmove(buffer + 1, buffer + 8, n - 8);
1916         } else if (0 == strncmp("discharging", buffer, 11)) {
1917                 buffer[0] = 'D';
1918                 memmove(buffer + 1, buffer + 11, n - 11);
1919         } else if (0 == strncmp("charged", buffer, 7)) {
1920                 buffer[0] = 'F';
1921                 memmove(buffer + 1, buffer + 7, n - 7);
1922         } else if (0 == strncmp("not present", buffer, 11)) {
1923                 buffer[0] = 'N';
1924                 memmove(buffer + 1, buffer + 11, n - 11);
1925         } else if (0 == strncmp("empty", buffer, 5)) {
1926                 buffer[0] = 'E';
1927                 memmove(buffer + 1, buffer + 5, n - 5);
1928         } else if (0 != strncmp("AC", buffer, 2)) {
1929                 buffer[0] = 'U';
1930                 memmove(buffer + 1, buffer + 11, n - 11);
1931         }
1932 }
1933
1934 int get_battery_perct(const char *bat)
1935 {
1936         static int rep = 0;
1937         int idx;
1938         char acpi_path[128];
1939         char sysfs_path[128];
1940         int remaining_capacity = -1;
1941
1942         snprintf(acpi_path, 127, ACPI_BATTERY_BASE_PATH "/%s/state", bat);
1943         snprintf(sysfs_path, 127, SYSFS_BATTERY_BASE_PATH "/%s/uevent", bat);
1944
1945         init_batteries();
1946
1947         idx = get_battery_idx(bat);
1948
1949         /* don't update battery too often */
1950         if (current_update_time - last_battery_perct_time[idx] < 30) {
1951                 return last_battery_perct[idx];
1952         }
1953         last_battery_perct_time[idx] = current_update_time;
1954
1955         /* Only check for SYSFS or ACPI */
1956
1957         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1958                 sysfs_bat_fp[idx] = open_file(sysfs_path, &rep);
1959                 rep = 0;
1960         }
1961
1962         if (sysfs_bat_fp[idx] == NULL && acpi_bat_fp[idx] == NULL && apm_bat_fp[idx] == NULL) {
1963                 acpi_bat_fp[idx] = open_file(acpi_path, &rep);
1964         }
1965
1966         if (sysfs_bat_fp[idx] != NULL) {
1967                 /* SYSFS */
1968                 while (!feof(sysfs_bat_fp[idx])) {
1969                         char buf[256];
1970                         if (fgets(buf, 256, sysfs_bat_fp[idx]) == NULL)
1971                                 break;
1972
1973                         if (strncmp(buf, "POWER_SUPPLY_CHARGE_NOW=", 24) == 0) {
1974                                 sscanf(buf, "POWER_SUPPLY_CHARGE_NOW=%d", &remaining_capacity);
1975                         } else if (strncmp(buf, "POWER_SUPPLY_CHARGE_FULL=",25) == 0) {
1976                                 sscanf(buf, "POWER_SUPPLY_CHARGE_FULL=%d", &acpi_design_capacity[idx]);
1977                         } else if (strncmp(buf, "POWER_SUPPLY_ENERGY_NOW=", 24) == 0) {
1978                                 sscanf(buf, "POWER_SUPPLY_ENERGY_NOW=%d", &remaining_capacity);
1979                         } else if (strncmp(buf, "POWER_SUPPLY_ENERGY_FULL=",25) == 0) {
1980                                 sscanf(buf, "POWER_SUPPLY_ENERGY_FULL=%d", &acpi_design_capacity[idx]);
1981                         }
1982                 }
1983
1984                 fclose(sysfs_bat_fp[idx]);
1985                 sysfs_bat_fp[idx] = NULL;
1986
1987         } else if (acpi_bat_fp[idx] != NULL) {
1988                 /* ACPI */
1989                 /* read last full capacity if it's zero */
1990                 if (acpi_design_capacity[idx] == 0) {
1991                         static int rep2;
1992                         char path[128];
1993                         FILE *fp;
1994
1995                         snprintf(path, 127, ACPI_BATTERY_BASE_PATH "/%s/info", bat);
1996                         fp = open_file(path, &rep2);
1997                         if (fp != NULL) {
1998                                 while (!feof(fp)) {
1999                                         char b[256];
2000
2001                                         if (fgets(b, 256, fp) == NULL) {
2002                                                 break;
2003                                         }
2004                                         if (sscanf(b, "last full capacity: %d",
2005                                                                 &acpi_design_capacity[idx]) != 0) {
2006                                                 break;
2007                                         }
2008                                 }
2009                                 fclose(fp);
2010                         }
2011                 }
2012
2013                 fseek(acpi_bat_fp[idx], 0, SEEK_SET);
2014
2015                 while (!feof(acpi_bat_fp[idx])) {
2016                         char buf[256];
2017
2018                         if (fgets(buf, 256, acpi_bat_fp[idx]) == NULL) {
2019                                 break;
2020                         }
2021
2022                         if (buf[0] == 'r') {
2023                                 sscanf(buf, "remaining capacity: %d", &remaining_capacity);
2024                         }
2025                 }
2026         }
2027         if (remaining_capacity < 0) {
2028                 return 0;
2029         }
2030         /* compute the battery percentage */
2031         last_battery_perct[idx] =
2032                 (int) (((float) remaining_capacity / acpi_design_capacity[idx]) * 100);
2033         if (last_battery_perct[idx] > 100) last_battery_perct[idx] = 100;
2034         return last_battery_perct[idx];
2035 }
2036
2037 int get_battery_perct_bar(const char *bar)
2038 {
2039         int idx;
2040
2041         get_battery_perct(bar);
2042         idx = get_battery_idx(bar);
2043         return (int) (last_battery_perct[idx] * 2.56 - 1);
2044 }
2045
2046 /* On Apple powerbook and ibook:
2047 $ cat /proc/pmu/battery_0
2048 flags      : 00000013
2049 charge     : 3623
2050 max_charge : 3720
2051 current    : 388
2052 voltage    : 16787
2053 time rem.  : 900
2054 $ cat /proc/pmu/info
2055 PMU driver version     : 2
2056 PMU firmware version   : 0c
2057 AC Power               : 1
2058 Battery count          : 1
2059 */
2060
2061 /* defines as in <linux/pmu.h> */
2062 #define PMU_BATT_PRESENT                0x00000001
2063 #define PMU_BATT_CHARGING               0x00000002
2064
2065 static FILE *pmu_battery_fp;
2066 static FILE *pmu_info_fp;
2067 static char pb_battery_info[3][32];
2068 static double pb_battery_info_update;
2069
2070 #define PMU_PATH "/proc/pmu"
2071 void get_powerbook_batt_info(char *buffer, size_t n, int i)
2072 {
2073         static int rep = 0;
2074         const char *batt_path = PMU_PATH "/battery_0";
2075         const char *info_path = PMU_PATH "/info";
2076         unsigned int flags;
2077         int charge, max_charge, ac = -1;
2078         long timeval = -1;
2079
2080         /* don't update battery too often */
2081         if (current_update_time - pb_battery_info_update < 29.5) {
2082                 snprintf(buffer, n, "%s", pb_battery_info[i]);
2083                 return;
2084         }
2085         pb_battery_info_update = current_update_time;
2086
2087         if (pmu_battery_fp == NULL) {
2088                 pmu_battery_fp = open_file(batt_path, &rep);
2089                 if (pmu_battery_fp == NULL) {
2090                         return;
2091                 }
2092         }
2093
2094         if (pmu_battery_fp != NULL) {
2095                 rewind(pmu_battery_fp);
2096                 while (!feof(pmu_battery_fp)) {
2097                         char buf[32];
2098
2099                         if (fgets(buf, sizeof(buf), pmu_battery_fp) == NULL) {
2100                                 break;
2101                         }
2102
2103                         if (buf[0] == 'f') {
2104                                 sscanf(buf, "flags      : %8x", &flags);
2105                         } else if (buf[0] == 'c' && buf[1] == 'h') {
2106                                 sscanf(buf, "charge     : %d", &charge);
2107                         } else if (buf[0] == 'm') {
2108                                 sscanf(buf, "max_charge : %d", &max_charge);
2109                         } else if (buf[0] == 't') {
2110                                 sscanf(buf, "time rem.  : %ld", &timeval);
2111                         }
2112                 }
2113         }
2114         if (pmu_info_fp == NULL) {
2115                 pmu_info_fp = open_file(info_path, &rep);
2116                 if (pmu_info_fp == NULL) {
2117                         return;
2118                 }
2119         }
2120
2121         if (pmu_info_fp != NULL) {
2122                 rewind(pmu_info_fp);
2123                 while (!feof(pmu_info_fp)) {
2124                         char buf[32];
2125
2126                         if (fgets(buf, sizeof(buf), pmu_info_fp) == NULL) {
2127                                 break;
2128                         }
2129                         if (buf[0] == 'A') {
2130                                 sscanf(buf, "AC Power               : %d", &ac);
2131                         }
2132                 }
2133         }
2134         /* update status string */
2135         if ((ac && !(flags & PMU_BATT_PRESENT))) {
2136                 strncpy(pb_battery_info[PB_BATT_STATUS], "AC", sizeof(pb_battery_info[PB_BATT_STATUS]));
2137         } else if (ac && (flags & PMU_BATT_PRESENT)
2138                         && !(flags & PMU_BATT_CHARGING)) {
2139                 strncpy(pb_battery_info[PB_BATT_STATUS], "charged", sizeof(pb_battery_info[PB_BATT_STATUS]));
2140         } else if ((flags & PMU_BATT_PRESENT) && (flags & PMU_BATT_CHARGING)) {
2141                 strncpy(pb_battery_info[PB_BATT_STATUS], "charging", sizeof(pb_battery_info[PB_BATT_STATUS]));
2142         } else {
2143                 strncpy(pb_battery_info[PB_BATT_STATUS], "discharging", sizeof(pb_battery_info[PB_BATT_STATUS]));
2144         }
2145
2146         /* update percentage string */
2147         if (timeval == 0 && ac && (flags & PMU_BATT_PRESENT)
2148                         && !(flags & PMU_BATT_CHARGING)) {
2149                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2150                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "100%%");
2151         } else if (timeval == 0) {
2152                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2153                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "unknown");
2154         } else {
2155                 snprintf(pb_battery_info[PB_BATT_PERCENT],
2156                         sizeof(pb_battery_info[PB_BATT_PERCENT]), "%d%%",
2157                         (charge * 100) / max_charge);
2158         }
2159
2160         /* update time string */
2161         if (timeval == 0) {                     /* fully charged or battery not present */
2162                 snprintf(pb_battery_info[PB_BATT_TIME],
2163                         sizeof(pb_battery_info[PB_BATT_TIME]), "unknown");
2164         } else if (timeval < 60 * 60) { /* don't show secs */
2165                 format_seconds_short(pb_battery_info[PB_BATT_TIME],
2166                         sizeof(pb_battery_info[PB_BATT_TIME]), timeval);
2167         } else {
2168                 format_seconds(pb_battery_info[PB_BATT_TIME],
2169                         sizeof(pb_battery_info[PB_BATT_TIME]), timeval);
2170         }
2171
2172         snprintf(buffer, n, "%s", pb_battery_info[i]);
2173 }
2174
2175 void update_top(void)
2176 {
2177         process_find_top(info.cpu, info.memu, info.time
2178 #ifdef IOSTATS
2179                 , info.io
2180 #endif
2181                 );
2182         info.first_process = get_first_process();
2183 }
2184
2185 #define ENTROPY_AVAIL_PATH "/proc/sys/kernel/random/entropy_avail"
2186
2187 int get_entropy_avail(unsigned int *val)
2188 {
2189         static int rep = 0;
2190         FILE *fp;
2191
2192         if (!(fp = open_file(ENTROPY_AVAIL_PATH, &rep)))
2193                 return 1;
2194
2195         if (fscanf(fp, "%u", val) != 1)
2196                 return 1;
2197
2198         fclose(fp);
2199         return 0;
2200 }
2201
2202 #define ENTROPY_POOLSIZE_PATH "/proc/sys/kernel/random/poolsize"
2203
2204 int get_entropy_poolsize(unsigned int *val)
2205 {
2206         static int rep = 0;
2207         FILE *fp;
2208
2209         if (!(fp = open_file(ENTROPY_POOLSIZE_PATH, &rep)))
2210                 return 1;
2211
2212         if (fscanf(fp, "%u", val) != 1)
2213                 return 1;
2214
2215         fclose(fp);
2216         return 0;
2217 }
2218
2219 const char *get_disk_protect_queue(const char *disk)
2220 {
2221         FILE *fp;
2222         char path[128];
2223         int state;
2224
2225         snprintf(path, 127, "/sys/block/%s/device/unload_heads", disk);
2226         if (access(path, F_OK)) {
2227                 snprintf(path, 127, "/sys/block/%s/queue/protect", disk);
2228         }
2229         if ((fp = fopen(path, "r")) == NULL)
2230                 return "n/a   ";
2231         if (fscanf(fp, "%d\n", &state) != 1) {
2232                 fclose(fp);
2233                 return "failed";
2234         }
2235         fclose(fp);
2236         return (state > 0) ? "frozen" : "free  ";
2237 }
2238
2239 void update_diskio(void)
2240 {
2241         FILE *fp;
2242         static int rep = 0;
2243         char buf[512], devbuf[64];
2244         unsigned int major, minor;
2245         int col_count = 0;
2246         struct diskio_stat *cur;
2247         unsigned int reads, writes;
2248         unsigned int total_reads = 0, total_writes = 0;
2249
2250         stats.current = 0;
2251         stats.current_read = 0;
2252         stats.current_write = 0;
2253
2254         if (!(fp = open_file("/proc/diskstats", &rep))) {
2255                 return;
2256         }
2257
2258         /* read reads and writes from all disks (minor = 0), including cd-roms
2259          * and floppies, and sum them up */
2260         while (fgets(buf, 512, fp)) {
2261                 col_count = sscanf(buf, "%u %u %s %*u %*u %u %*u %*u %*u %u", &major,
2262                         &minor, devbuf, &reads, &writes);
2263                 /* ignore subdevices (they have only 3 matching entries in their line)
2264                  * and virtual devices (LVM, network block devices, RAM disks, Loopback)
2265                  *
2266                  * XXX: ignore devices which are part of a SW RAID (MD_MAJOR) */
2267                 if (col_count == 5 && major != LVM_BLK_MAJOR && major != NBD_MAJOR
2268                                 && major != RAMDISK_MAJOR && major != LOOP_MAJOR) {
2269                         total_reads += reads;
2270                         total_writes += writes;
2271                 } else {
2272                         col_count = sscanf(buf, "%u %u %s %*u %u %*u %u",
2273                                 &major, &minor, devbuf, &reads, &writes);
2274                         if (col_count != 5) {
2275                                 continue;
2276                         }
2277                 }
2278                 cur = stats.next;
2279                 while (cur && strcmp(devbuf, cur->dev))
2280                         cur = cur->next;
2281
2282                 if (cur)
2283                         update_diskio_values(cur, reads, writes);
2284         }
2285         update_diskio_values(&stats, total_reads, total_writes);
2286         fclose(fp);
2287 }