git.sur5r.net Git - i3/i3status/blob - wmiistatus.c

   1 /*
   2  * Generates a status line for use with wmii or other minimal window managers
   3  *
   4  *
   5  * Copyright (c) 2008-2009 Michael Stapelberg and contributors
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without modification,
   9  * are permitted provided that the following conditions are met:
  10  *
  11  * * Redistributions of source code must retain the above copyright notice, this
  12  *   list of conditions and the following disclaimer.
  13  *
  14  * * Redistributions in binary form must reproduce the above copyright notice, this
  15  *   list of conditions and the following disclaimer in the documentation and/or other
  16  *   materials provided with the distribution.
  17  *
  18  * * Neither the name of Michael Stapelberg nor the names of contributors
  19  *   may be used to endorse or promote products derived from this software without
  20  *   specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
  23  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  25  * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  27  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  28  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  30  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  31  * DAMAGE.
  32  *
  33  */
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <fcntl.h>
  37 #include <string.h>
  38 #include <stdio.h>
  39 #include <time.h>
  40 #include <stdbool.h>
  41 #include <stdarg.h>
  42 #include <unistd.h>
  43 #include <stdlib.h>
  44 #include <limits.h>
  45 #include <ctype.h>
  46 #include <net/if.h>
  47 #include <sys/ioctl.h>
  48 #include <sys/socket.h>
  49 #include <netinet/in.h>
  50 #include <arpa/inet.h>
  51 #include <glob.h>
  52 #include <dirent.h>
  53 #include <getopt.h>
  54
  55 #ifdef LINUX
  56 #include <linux/ethtool.h>
  57 #include <linux/sockios.h>
  58 #else
  59 /* TODO: correctly check for *BSD */
  60 #include <sys/param.h>
  61 #include <sys/sysctl.h>
  62 #include <sys/resource.h>
  63 #endif
  64
  65 #define _IS_WMIISTATUS_C
  66 #include "wmiistatus.h"
  67 #undef _IS_WMIISTATUS_C
  68
  69 /* socket file descriptor for general purposes */
  70 static int general_socket;
  71
  72 static const char *wlan_interface;
  73 static const char *eth_interface;
  74 static char *wmii_path;
  75 static const char *time_format;
  76 static const char *battery_path;
  77 static bool use_colors;
  78 static bool get_ethspeed;
  79 static const char *wmii_normcolors = "#222222 #333333";
  80 static char order[MAX_ORDER][2];
  81 static const char **run_watches;
  82 static unsigned int num_run_watches;
  83 static unsigned int interval = 1;
  84
  85 /*
  86  * This function just concats two strings in place, it should only be used
  87  * for concatting order to the name of a file or concatting color codes.
  88  * Otherwise, the buffer size would have to be increased.
  89  *
  90  */
  91 static char *concat(const char *str1, const char *str2) {
  92         static char concatbuf[32];
  93         (void)snprintf(concatbuf, sizeof(concatbuf), "%s%s", str1, str2);
  94         return concatbuf;
  95 }
  96
  97 /*
  98  * Cleans wmii's /rbar directory by deleting all regular files
  99  *
 100  */
 101 static void cleanup_rbar_dir() {
 102         struct dirent *ent;
 103         DIR *dir;
 104         char pathbuf[strlen(wmii_path)+256+1];
 105
 106         if ((dir = opendir(wmii_path)) == NULL)
 107                 exit(EXIT_FAILURE);
 108
 109         while ((ent = readdir(dir)) != NULL) {
 110                 if (ent->d_type == DT_REG) {
 111                         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, ent->d_name);
 112                         if (unlink(pathbuf) == -1)
 113                                 exit(EXIT_FAILURE);
 114                 }
 115         }
 116
 117         (void)closedir(dir);
 118 }
 119
 120 /*
 121  * Creates the specified file in wmii's /rbar directory with
 122  * correct modes and initializes colors if colormode is enabled
 123  *
 124  */
 125 static void create_file(const char *name) {
 126         char pathbuf[strlen(wmii_path)+256+1];
 127         int fd;
 128         int flags = O_CREAT | O_WRONLY;
 129         struct stat statbuf;
 130
 131         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 132
 133         /* Overwrite file's contents if it exists */
 134         if (stat(pathbuf, &statbuf) >= 0)
 135                 flags |= O_TRUNC;
 136
 137         if ((fd = open(pathbuf, flags, S_IRUSR | S_IWUSR)) < 0)
 138                 exit(EXIT_FAILURE);
 139         if (use_colors) {
 140                 char *tmp = concat("#888888 ", wmii_normcolors);
 141                 if (write(fd, tmp, strlen(tmp)) != (ssize_t)strlen(tmp))
 142                         exit(EXIT_FAILURE);
 143         }
 144         (void)close(fd);
 145 }
 146
 147 /*
 148  * Waits until wmii_path/rbar exists (= the filesystem gets mounted),
 149  * cleans up all files and creates the needed files
 150  *
 151  */
 152 static void setup(void) {
 153         unsigned int i;
 154         struct stat statbuf;
 155         char pathbuf[512];
 156
 157         /* Wait until wmii_path/rbar exists */
 158         for (; stat(wmii_path, &statbuf) < 0; sleep(interval));
 159
 160         cleanup_rbar_dir();
 161         if (wlan_interface)
 162                 create_file(concat(order[ORDER_WLAN],"wlan"));
 163         if (eth_interface)
 164                 create_file(concat(order[ORDER_ETH],"eth"));
 165         if (battery_path)
 166                 create_file(concat(order[ORDER_BATTERY],"battery"));
 167         create_file(concat(order[ORDER_LOAD],"load"));
 168         if (time_format)
 169                 create_file(concat(order[ORDER_TIME],"time"));
 170         for (i = 0; i < num_run_watches; i += 2) {
 171                 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 172                 create_file(pathbuf);
 173         }
 174 }
 175
 176 /*
 177  * Writes the given message in the corresponding file in wmii's /rbar directory
 178  *
 179  */
 180 static void write_to_statusbar(const char *name, const char *message) {
 181         char pathbuf[strlen(wmii_path)+256+1];
 182         int fd;
 183
 184         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 185         if ((fd = open(pathbuf, O_RDWR)) == -1) {
 186                 /* Try to re-setup stuff and just continue */
 187                 setup();
 188                 return;
 189         }
 190         if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
 191                 exit(EXIT_FAILURE);
 192         (void)close(fd);
 193 }
 194
 195 /*
 196  * Writes an errormessage to statusbar
 197  *
 198  */
 199 static void write_error_to_statusbar(const char *message) {
 200         cleanup_rbar_dir();
 201         create_file("error");
 202         write_to_statusbar("error", message);
 203 }
 204
 205 /*
 206  * Write errormessage to statusbar and exit
 207  *
 208  */
 209 void die(const char *fmt, ...) {
 210         if (wmii_path != NULL) {
 211                 char buffer[512];
 212                 va_list ap;
 213                 va_start(ap, fmt);
 214                 (void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
 215                 va_end(ap);
 216
 217                 write_error_to_statusbar(buffer);
 218         }
 219         exit(EXIT_FAILURE);
 220 }
 221
 222 /*
 223  * Skip the given character for exactly 'amount' times, returns
 224  * a pointer to the first non-'character' character in 'input'.
 225  *
 226  */
 227 static char *skip_character(char *input, char character, int amount) {
 228         char *walk;
 229         size_t len = strlen(input);
 230         int blanks = 0;
 231
 232         for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++)
 233                 if (*walk == character)
 234                         blanks++;
 235
 236         return (walk == input ? walk : walk-1);
 237 }
 238
 239 /*
 240  * Get battery information from /sys. Note that it uses the design capacity to
 241  * calculate the percentage, not the last full capacity, so you can see how
 242  * worn off your battery is.
 243  *
 244  */
 245 static char *get_battery_info() {
 246         char buf[1024];
 247         static char part[512];
 248         char *walk, *last;
 249         int fd;
 250         int full_design = -1,
 251             remaining = -1,
 252             present_rate = -1;
 253         charging_status_t status = CS_DISCHARGING;
 254
 255         if ((fd = open(battery_path, O_RDONLY)) == -1)
 256                 return "No battery found";
 257
 258         memset(part, 0, sizeof(part));
 259         (void)read(fd, buf, sizeof(buf));
 260         for (walk = buf, last = buf; (walk-buf) < 1024; walk++)
 261                 if (*walk == '=') {
 262                         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN") ||
 263                             BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN"))
 264                                 full_design = atoi(walk+1);
 265                         else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
 266                                  BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
 267                                 remaining = atoi(walk+1);
 268                         else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
 269                                 present_rate = atoi(walk+1);
 270                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 271                                 status = CS_CHARGING;
 272                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 273                                 status = CS_FULL;
 274                 } else if (*walk == '\n')
 275                         last = walk+1;
 276         (void)close(fd);
 277
 278         if ((full_design != -1) && (remaining != -1) && (present_rate != -1)) {
 279                 float remaining_time;
 280                 int seconds, hours, minutes;
 281                 if (status == CS_CHARGING)
 282                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 283                 else if (status == CS_DISCHARGING)
 284                         remaining_time = ((float)remaining / (float)present_rate);
 285                 else remaining_time = 0;
 286
 287                 seconds = (int)(remaining_time * 3600.0);
 288                 hours = seconds / 3600;
 289                 seconds -= (hours * 3600);
 290                 minutes = seconds / 60;
 291                 seconds -= (minutes * 60);
 292
 293                 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
 294                         (status == CS_CHARGING ? "CHR" :
 295                          (status == CS_DISCHARGING ? "BAT" : "FULL")),
 296                         (((float)remaining / (float)full_design) * 100),
 297                         hours, minutes, seconds);
 298         }
 299         return part;
 300 }
 301
 302 /*
 303  * Return the IP address for the given interface or "no IP" if the
 304  * interface is up and running but hasn't got an IP address yet
 305  *
 306  */
 307 static const char *get_ip_address(const char *interface) {
 308         static char part[512];
 309         struct ifreq ifr;
 310         struct sockaddr_in addr;
 311         socklen_t len = sizeof(struct sockaddr_in);
 312         memset(part, 0, sizeof(part));
 313
 314         (void)strcpy(ifr.ifr_name, interface);
 315         ifr.ifr_addr.sa_family = AF_INET;
 316         if (ioctl(general_socket, SIOCGIFADDR, &ifr) < 0)
 317                 return NULL;
 318
 319         memcpy(&addr, &ifr.ifr_addr, len);
 320         (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, len);
 321         if (strlen(part) == 0)
 322                 (void)snprintf(part, sizeof(part), "no IP");
 323
 324         return part;
 325 }
 326
 327 /*
 328  * Just parses /proc/net/wireless looking for lines beginning with
 329  * wlan_interface, extracting the quality of the link and adding the
 330  * current IP address of wlan_interface.
 331  *
 332  */
 333 static char *get_wireless_info() {
 334         char buf[1024];
 335         static char part[512];
 336         char *interfaces;
 337         int fd;
 338         memset(buf, 0, sizeof(buf));
 339         memset(part, 0, sizeof(part));
 340
 341         if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1)
 342                 die("Could not open /proc/net/wireless\n");
 343         (void)read(fd, buf, sizeof(buf));
 344         (void)close(fd);
 345
 346         interfaces = skip_character(buf, '\n', 1) + 1;
 347         while ((interfaces = skip_character(interfaces, '\n', 1)+1) < buf+strlen(buf)) {
 348                 while (isspace((int)*interfaces))
 349                         interfaces++;
 350                 if (!BEGINS_WITH(interfaces, wlan_interface))
 351                         continue;
 352                 int quality;
 353                 if (sscanf(interfaces, "%*[^:]: 0000 %d", &quality) != 1)
 354                         continue;
 355                 if ((quality == UCHAR_MAX) || (quality == 0)) {
 356                         if (use_colors)
 357                                 (void)snprintf(part, sizeof(part), "%s%s",
 358                                         concat("#FF0000 ", wmii_normcolors), " W: down");
 359                         else (void)snprintf(part, sizeof(part), "W: down");
 360                 } else (void)snprintf(part, sizeof(part), "W: (%03d%%) %s",
 361                                 quality, get_ip_address(wlan_interface));
 362                 return part;
 363         }
 364
 365         return part;
 366 }
 367
 368 /*
 369  * Combines ethernet IP addresses and speed (if requested) for displaying
 370  *
 371  */
 372 static char *get_eth_info() {
 373         static char part[512];
 374         const char *ip_address = get_ip_address(eth_interface);
 375         int ethspeed = 0;
 376
 377         if (get_ethspeed) {
 378 #ifdef LINUX
 379                 /* This code path requires root privileges */
 380                 struct ifreq ifr;
 381                 struct ethtool_cmd ecmd;
 382
 383                 ecmd.cmd = ETHTOOL_GSET;
 384                 (void)memset(&ifr, 0, sizeof(ifr));
 385                 ifr.ifr_data = (caddr_t)&ecmd;
 386                 (void)strcpy(ifr.ifr_name, eth_interface);
 387                 if (ioctl(general_socket, SIOCETHTOOL, &ifr) == 0)
 388                         ethspeed = (ecmd.speed == USHRT_MAX ? 0 : ecmd.speed);
 389                 else get_ethspeed = false;
 390 #endif
 391         }
 392
 393         if (ip_address == NULL)
 394                 (void)snprintf(part, sizeof(part), "E: down");
 395         else {
 396                 if (get_ethspeed)
 397                         (void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed);
 398                 else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
 399         }
 400
 401         return part;
 402 }
 403
 404 /*
 405  * Checks if the PID in path is still valid by checking:
 406  *  (Linux) if /proc/<pid> exists
 407  *  (NetBSD) if sysctl returns process infos for this pid
 408  *
 409  */
 410 static bool process_runs(const char *path) {
 411         char pidbuf[16];
 412         static glob_t globbuf;
 413         int fd;
 414         memset(pidbuf, 0, sizeof(pidbuf));
 415
 416         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 417                 die("glob() failed\n");
 418         fd = open((globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path), O_RDONLY);
 419         globfree(&globbuf);
 420         if (fd < 0)
 421                 return false;
 422         (void)read(fd, pidbuf, sizeof(pidbuf));
 423         (void)close(fd);
 424
 425 #ifdef LINUX
 426         struct stat statbuf;
 427         char procbuf[512];
 428         (void)snprintf(procbuf, sizeof(procbuf), "/proc/%ld", strtol(pidbuf, NULL, 10));
 429         return (stat(procbuf, &statbuf) >= 0);
 430 #else
 431         /* TODO: correctly check for NetBSD. Evaluate if this runs on OpenBSD/FreeBSD */
 432         struct kinfo_proc info;
 433         size_t length = sizeof(struct kinfo_proc);
 434         int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, strtol(pidbuf, NULL, 10) };
 435         if (sysctl(mib, 4, &info, &length, NULL, 0) < 0)
 436                 return false;
 437         return (length != 0);
 438 #endif
 439 }
 440
 441 /*
 442  * Reads the configuration from the given file
 443  *
 444  */
 445 static int load_configuration(const char *configfile) {
 446         #define OPT(x) else if (strcasecmp(dest_name, x) == 0)
 447
 448         /* check if the file exists */
 449         struct stat buf;
 450         if (stat(configfile, &buf) < 0)
 451                 return -1;
 452
 453         int result = 0;
 454         FILE *handle = fopen(configfile, "r");
 455         if (handle == NULL)
 456                 die("Could not open configfile\n");
 457         char dest_name[512], dest_value[512], whole_buffer[1026];
 458         struct stat stbuf;
 459         while (!feof(handle)) {
 460                 char *ret;
 461                 if ((ret = fgets(whole_buffer, 1024, handle)) == whole_buffer) {
 462                         /* sscanf implicitly strips whitespace */
 463                         if (sscanf(whole_buffer, "%s %[^\n]", dest_name, dest_value) < 1)
 464                                 continue;
 465                 } else if (ret != NULL)
 466                         die("Could not read line in configuration file\n");
 467
 468                 /* skip comments and empty lines */
 469                 if (dest_name[0] == '#' || strlen(dest_name) < 3)
 470                         continue;
 471
 472                 OPT("wlan")
 473                         wlan_interface = strdup(dest_value);
 474                 OPT("eth")
 475                         eth_interface = strdup(dest_value);
 476                 OPT("time_format")
 477                         time_format = strdup(dest_value);
 478                 OPT("battery_path")
 479                         battery_path = strdup(dest_value);
 480                 OPT("color")
 481                         use_colors = true;
 482                 OPT("get_ethspeed")
 483                         get_ethspeed = true;
 484                 OPT("normcolors")
 485                         wmii_normcolors = strdup(dest_value);
 486                 OPT("interval")
 487                         interval = atoi(dest_value);
 488                 OPT("wmii_path")
 489                 {
 490                         static glob_t globbuf;
 491                         if (glob(dest_value, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 492                                 die("glob() failed\n");
 493                         wmii_path = strdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : dest_value);
 494                         globfree(&globbuf);
 495
 496                         if ((stat(wmii_path, &stbuf)) == -1) {
 497                                 fprintf(stderr, "Warning: wmii_path contains an invalid path\n");
 498                                 free(wmii_path);
 499                                 wmii_path = strdup(dest_value);
 500                         }
 501                         if (wmii_path[strlen(wmii_path)-1] != '/')
 502                                 die("wmii_path is not terminated by /\n");
 503                 }
 504                 OPT("run_watch")
 505                 {
 506                         char *name = strdup(dest_value);
 507                         char *path = name;
 508                         while (*path != ' ')
 509                                 path++;
 510                         *(path++) = '\0';
 511                         num_run_watches += 2;
 512                         run_watches = realloc(run_watches, sizeof(char*) * num_run_watches);
 513                         run_watches[num_run_watches-2] = name;
 514                         run_watches[num_run_watches-1] = path;
 515                 }
 516                 OPT("order")
 517                 {
 518                         #define SET_ORDER(opt, idx) { if (strcasecmp(token, opt) == 0) sprintf(order[idx], "%d", c++); }
 519                         char *walk, *token;
 520                         int c = 0;
 521                         walk = token = dest_value;
 522                         while (*walk != '\0') {
 523                                 while ((*walk != ',') && (*walk != '\0'))
 524                                         walk++;
 525                                 *(walk++) = '\0';
 526                                 SET_ORDER("run", ORDER_RUN);
 527                                 SET_ORDER("wlan", ORDER_WLAN);
 528                                 SET_ORDER("eth", ORDER_ETH);
 529                                 SET_ORDER("battery", ORDER_BATTERY);
 530                                 SET_ORDER("load", ORDER_LOAD);
 531                                 SET_ORDER("time", ORDER_TIME);
 532                                 token = walk;
 533                                 while (isspace((int)(*token)))
 534                                         token++;
 535                         }
 536                 }
 537                 else
 538                 {
 539                         result = -2;
 540                         die("Unknown configfile option: %s\n", dest_name);
 541                 }
 542         }
 543         fclose(handle);
 544
 545         if (wmii_path == NULL)
 546                 exit(EXIT_FAILURE);
 547
 548         return result;
 549 }
 550
 551 int main(int argc, char *argv[]) {
 552         char part[512],
 553              pathbuf[512];
 554         unsigned int i;
 555
 556         char *configfile = PREFIX "/etc/wmiistatus.conf";
 557         int o, option_index = 0;
 558         struct option long_options[] = {
 559                 {"config", required_argument, 0, 'c'},
 560                 {"help", no_argument, 0, 'h'},
 561                 {0, 0, 0, 0}
 562         };
 563
 564         while ((o = getopt_long(argc, argv, "c:h", long_options, &option_index)) != -1)
 565                 if ((char)o == 'c')
 566                         configfile = optarg;
 567                 else if ((char)o == 'h') {
 568                         printf("wmiistatus (c) 2008-2009 Michael Stapelberg\n"
 569                                 "Syntax: %s [-c <configfile>]\n", argv[0]);
 570                         return 0;
 571                 }
 572
 573         if (load_configuration(configfile) < 0)
 574                 return EXIT_FAILURE;
 575
 576         setup();
 577
 578         if ((general_socket = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
 579                 die("Could not create socket\n");
 580
 581         while (1) {
 582                 for (i = 0; i < num_run_watches; i += 2) {
 583                         bool running = process_runs(run_watches[i+1]);
 584                         if (use_colors)
 585                                 snprintf(part, sizeof(part), "%s %s: %s",
 586                                         (running ?
 587                                                 concat("#00FF00 ", wmii_normcolors) :
 588                                                 concat("#FF0000 ", wmii_normcolors)),
 589                                         run_watches[i],
 590                                         (running ? "yes" : "no"));
 591                         else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no"));
 592                         snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 593                         write_to_statusbar(pathbuf, part);
 594                 }
 595
 596                 if (wlan_interface)
 597                         write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info());
 598                 if (eth_interface)
 599                         write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info());
 600                 if (battery_path)
 601                         write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info());
 602
 603                 /* Get load */
 604 #ifdef LINUX
 605                 int load_avg;
 606                 if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1)
 607                         die("Could not open /proc/loadavg\n");
 608                 (void)read(load_avg, part, sizeof(part));
 609                 (void)close(load_avg);
 610                 *skip_character(part, ' ', 3) = '\0';
 611 #else
 612                 /* TODO: correctly check for NetBSD, check if it works the same on *BSD */
 613                 struct loadavg load;
 614                 size_t length = sizeof(struct loadavg);
 615                 int mib[2] = { CTL_VM, VM_LOADAVG };
 616                 if (sysctl(mib, 2, &load, &length, NULL, 0) < 0)
 617                         die("Could not sysctl({ CTL_VM, VM_LOADAVG })\n");
 618                 double scale = load.fscale;
 619                 (void)snprintf(part, sizeof(part), "%.02f %.02f %.02f",
 620                                 (double)load.ldavg[0] / scale,
 621                                 (double)load.ldavg[1] / scale,
 622                                 (double)load.ldavg[2] / scale);
 623 #endif
 624                 write_to_statusbar(concat(order[ORDER_LOAD], "load"), part);
 625
 626                 if (time_format) {
 627                         /* Get date & time */
 628                         time_t current_time = time(NULL);
 629                         struct tm *current_tm = localtime(&current_time);
 630                         (void)strftime(part, sizeof(part), time_format, current_tm);
 631                         write_to_statusbar(concat(order[ORDER_TIME], "time"), part);
 632                 }
 633
 634                 sleep(interval);
 635         }
 636 }