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