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

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3status – Generates a status line for dzen2 or wmii
   5  *
   6  *
   7  * Copyright © 2008-2009 Michael Stapelberg and contributors
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without modification,
  11  * are permitted provided that the following conditions are met:
  12  *
  13  * * Redistributions of source code must retain the above copyright notice, this
  14  *   list of conditions and the following disclaimer.
  15  *
  16  * * Redistributions in binary form must reproduce the above copyright notice, this
  17  *   list of conditions and the following disclaimer in the documentation and/or other
  18  *   materials provided with the distribution.
  19  *
  20  * * Neither the name of Michael Stapelberg nor the names of contributors
  21  *   may be used to endorse or promote products derived from this software without
  22  *   specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
  25  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  27  * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  30  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  32  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  33  * DAMAGE.
  34  *
  35  */
  36 #include <sys/types.h>
  37 #include <sys/stat.h>
  38 #include <fcntl.h>
  39 #include <string.h>
  40 #include <stdio.h>
  41 #include <time.h>
  42 #include <stdbool.h>
  43 #include <stdarg.h>
  44 #include <unistd.h>
  45 #include <stdlib.h>
  46 #include <limits.h>
  47 #include <ctype.h>
  48 #include <net/if.h>
  49 #include <sys/ioctl.h>
  50 #include <sys/socket.h>
  51 #include <netinet/in.h>
  52 #include <arpa/inet.h>
  53 #include <glob.h>
  54 #include <dirent.h>
  55 #include <getopt.h>
  56
  57 #include "queue.h"
  58
  59 #ifdef LINUX
  60 #include <linux/ethtool.h>
  61 #include <linux/sockios.h>
  62 #else
  63 /* TODO: correctly check for *BSD */
  64 #include <sys/param.h>
  65 #include <sys/sysctl.h>
  66 #include <sys/resource.h>
  67 #endif
  68
  69 #include "i3status.h"
  70
  71 #define BAR "^fg(#333333)^p(5;-2)^ro(2)^p()^fg()^p(5)"
  72
  73 struct battery {
  74         const char *path;
  75         SIMPLEQ_ENTRY(battery) batteries;
  76 };
  77
  78 SIMPLEQ_HEAD(battery_head, battery) batteries;
  79
  80 /* socket file descriptor for general purposes */
  81 static int general_socket;
  82
  83 static const char *wlan_interface;
  84 static const char *eth_interface;
  85 static char *wmii_path;
  86 static const char *time_format;
  87 static const char *battery_path;
  88 static bool use_colors;
  89 static bool get_ethspeed;
  90 static const char *wmii_normcolors = "#222222 #333333";
  91 static char order[MAX_ORDER][2];
  92 static const char **run_watches;
  93 static unsigned int num_run_watches;
  94 static unsigned int interval = 1;
  95
  96 /*
  97  * This function just concats two strings in place, it should only be used
  98  * for concatting order to the name of a file or concatting color codes.
  99  * Otherwise, the buffer size would have to be increased.
 100  *
 101  */
 102 static char *concat(const char *str1, const char *str2) {
 103         static char concatbuf[32];
 104         (void)snprintf(concatbuf, sizeof(concatbuf), "%s%s", str1, str2);
 105         return concatbuf;
 106 }
 107
 108 /*
 109  * Returns the correct color format for dzen (^fg(color)) or wmii (color <normcolors>)
 110  *
 111  */
 112 static char *color(const char *colorstr) {
 113         static char colorbuf[32];
 114 #ifdef DZEN
 115         (void)snprintf(colorbuf, sizeof(colorbuf), "^fg(%s)", colorstr);
 116 #else
 117         (void)snprintf(colorbuf, sizeof(colorbuf), "%s %s ", colorstr, wmii_normcolors);
 118 #endif
 119         return colorbuf;
 120 }
 121
 122 /*
 123  * Cleans wmii's /rbar directory by deleting all regular files
 124  *
 125  */
 126 static void cleanup_rbar_dir() {
 127 #ifdef DZEN
 128         return;
 129 #endif
 130         struct dirent *ent;
 131         DIR *dir;
 132         char pathbuf[strlen(wmii_path)+256+1];
 133
 134         if ((dir = opendir(wmii_path)) == NULL)
 135                 exit(EXIT_FAILURE);
 136
 137         while ((ent = readdir(dir)) != NULL) {
 138                 if (ent->d_type == DT_REG) {
 139                         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, ent->d_name);
 140                         if (unlink(pathbuf) == -1)
 141                                 exit(EXIT_FAILURE);
 142                 }
 143         }
 144
 145         (void)closedir(dir);
 146 }
 147
 148 /*
 149  * Creates the specified file in wmii's /rbar directory with
 150  * correct modes and initializes colors if colormode is enabled
 151  *
 152  */
 153 static void create_file(const char *name) {
 154 #ifdef DZEN
 155         return;
 156 #endif
 157         char pathbuf[strlen(wmii_path)+256+1];
 158         int fd;
 159         int flags = O_CREAT | O_WRONLY;
 160         struct stat statbuf;
 161
 162         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 163
 164         /* Overwrite file's contents if it exists */
 165         if (stat(pathbuf, &statbuf) >= 0)
 166                 flags |= O_TRUNC;
 167
 168         if ((fd = open(pathbuf, flags, S_IRUSR | S_IWUSR)) < 0)
 169                 exit(EXIT_FAILURE);
 170         if (use_colors) {
 171                 char *tmp = color("#888888");
 172                 if (write(fd, tmp, strlen(tmp)) != (ssize_t)strlen(tmp))
 173                         exit(EXIT_FAILURE);
 174         }
 175         (void)close(fd);
 176 }
 177
 178 /*
 179  * Waits until wmii_path/rbar exists (= the filesystem gets mounted),
 180  * cleans up all files and creates the needed files
 181  *
 182  */
 183 static void setup(void) {
 184         unsigned int i;
 185         char pathbuf[512];
 186
 187 #ifndef DZEN
 188         struct stat statbuf;
 189         /* Wait until wmii_path/rbar exists */
 190         for (; stat(wmii_path, &statbuf) < 0; sleep(interval));
 191 #endif
 192
 193         cleanup_rbar_dir();
 194         if (wlan_interface)
 195                 create_file(concat(order[ORDER_WLAN],"wlan"));
 196         if (eth_interface)
 197                 create_file(concat(order[ORDER_ETH],"eth"));
 198         if (battery_path)
 199                 create_file(concat(order[ORDER_BATTERY],"battery"));
 200         create_file(concat(order[ORDER_LOAD],"load"));
 201         if (time_format)
 202                 create_file(concat(order[ORDER_TIME],"time"));
 203         for (i = 0; i < num_run_watches; i += 2) {
 204                 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 205                 create_file(pathbuf);
 206         }
 207 }
 208
 209 /*
 210  * Writes the given message in the corresponding file in wmii's /rbar directory
 211  *
 212  */
 213 static void write_to_statusbar(const char *name, const char *message, bool final_entry) {
 214 #ifdef DZEN
 215         if (final_entry) {
 216                 (void)printf("%s^p(6)\n", message);
 217                 fflush(stdout);
 218                 return;
 219         }
 220         (void)printf("%s" BAR, message);
 221         return;
 222 #endif
 223
 224         char pathbuf[strlen(wmii_path)+256+1];
 225         int fd;
 226
 227         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 228         if ((fd = open(pathbuf, O_RDWR)) == -1) {
 229                 /* Try to re-setup stuff and just continue */
 230                 setup();
 231                 return;
 232         }
 233         if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
 234                 exit(EXIT_FAILURE);
 235         (void)close(fd);
 236 }
 237
 238 /*
 239  * Writes an errormessage to statusbar
 240  *
 241  */
 242 static void write_error_to_statusbar(const char *message) {
 243         cleanup_rbar_dir();
 244         create_file("error");
 245         write_to_statusbar("error", message, true);
 246 }
 247
 248 /*
 249  * Write errormessage to statusbar and exit
 250  *
 251  */
 252 void die(const char *fmt, ...) {
 253         if (wmii_path != NULL) {
 254                 char buffer[512];
 255                 va_list ap;
 256                 va_start(ap, fmt);
 257                 (void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
 258                 va_end(ap);
 259
 260                 write_error_to_statusbar(buffer);
 261         }
 262         exit(EXIT_FAILURE);
 263 }
 264
 265 /*
 266  * Skip the given character for exactly 'amount' times, returns
 267  * a pointer to the first non-'character' character in 'input'.
 268  *
 269  */
 270 static char *skip_character(char *input, char character, int amount) {
 271         char *walk;
 272         size_t len = strlen(input);
 273         int blanks = 0;
 274
 275         for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++)
 276                 if (*walk == character)
 277                         blanks++;
 278
 279         return (walk == input ? walk : walk-1);
 280 }
 281
 282 /*
 283  * Get battery information from /sys. Note that it uses the design capacity to
 284  * calculate the percentage, not the last full capacity, so you can see how
 285  * worn off your battery is.
 286  *
 287  */
 288 static char *get_battery_info(const char *path) {
 289         char buf[1024];
 290         static char part[512];
 291         char *walk, *last;
 292         int fd;
 293         int full_design = -1,
 294             remaining = -1,
 295             present_rate = -1;
 296         charging_status_t status = CS_DISCHARGING;
 297
 298         if ((fd = open(path, O_RDONLY)) == -1)
 299                 return "No battery found";
 300
 301         memset(part, 0, sizeof(part));
 302         (void)read(fd, buf, sizeof(buf));
 303         for (walk = buf, last = buf; (walk-buf) < 1024; walk++)
 304                 if (*walk == '=') {
 305                         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN") ||
 306                             BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN"))
 307                                 full_design = atoi(walk+1);
 308                         else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
 309                                  BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
 310                                 remaining = atoi(walk+1);
 311                         else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
 312                                 present_rate = atoi(walk+1);
 313                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 314                                 status = CS_CHARGING;
 315                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 316                                 status = CS_FULL;
 317                 } else if (*walk == '\n')
 318                         last = walk+1;
 319         (void)close(fd);
 320
 321         if ((full_design == 1) || (remaining == -1))
 322                 return part;
 323
 324         if (present_rate > 0) {
 325                 float remaining_time;
 326                 int seconds, hours, minutes;
 327                 if (status == CS_CHARGING)
 328                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 329                 else if (status == CS_DISCHARGING)
 330                         remaining_time = ((float)remaining / (float)present_rate);
 331                 else remaining_time = 0;
 332
 333                 seconds = (int)(remaining_time * 3600.0);
 334                 hours = seconds / 3600;
 335                 seconds -= (hours * 3600);
 336                 minutes = seconds / 60;
 337                 seconds -= (minutes * 60);
 338
 339                 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
 340                         (status == CS_CHARGING ? "CHR" :
 341                          (status == CS_DISCHARGING ? "BAT" : "FULL")),
 342                         (((float)remaining / (float)full_design) * 100),
 343                         hours, minutes, seconds);
 344         } else {
 345                 (void)snprintf(part, sizeof(part), "%s %.02f%%",
 346                         (status == CS_CHARGING ? "CHR" :
 347                          (status == CS_DISCHARGING ? "BAT" : "FULL")),
 348                         (((float)remaining / (float)full_design) * 100));
 349         }
 350         return part;
 351 }
 352
 353 /*
 354  * Return the IP address for the given interface or "no IP" if the
 355  * interface is up and running but hasn't got an IP address yet
 356  *
 357  */
 358 static const char *get_ip_address(const char *interface) {
 359         static char part[512];
 360         struct ifreq ifr;
 361         struct sockaddr_in addr;
 362         socklen_t len = sizeof(struct sockaddr_in);
 363         memset(part, 0, sizeof(part));
 364
 365         /* First check if the interface is running */
 366         (void)strcpy(ifr.ifr_name, interface);
 367         if (ioctl(general_socket, SIOCGIFFLAGS, &ifr) < 0 ||
 368             !(ifr.ifr_flags & IFF_RUNNING))
 369                 return NULL;
 370
 371         /* Interface is up, get the IP address */
 372         (void)strcpy(ifr.ifr_name, interface);
 373         ifr.ifr_addr.sa_family = AF_INET;
 374         if (ioctl(general_socket, SIOCGIFADDR, &ifr) < 0)
 375                 return "no IP";
 376
 377         memcpy(&addr, &ifr.ifr_addr, len);
 378         (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, len);
 379         if (strlen(part) == 0)
 380                 (void)snprintf(part, sizeof(part), "no IP");
 381
 382         return part;
 383 }
 384
 385 /*
 386  * Just parses /proc/net/wireless looking for lines beginning with
 387  * wlan_interface, extracting the quality of the link and adding the
 388  * current IP address of wlan_interface.
 389  *
 390  */
 391 static char *get_wireless_info() {
 392         char buf[1024];
 393         static char part[512];
 394         char *interfaces;
 395         int fd;
 396         memset(buf, 0, sizeof(buf));
 397         memset(part, 0, sizeof(part));
 398
 399         if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1)
 400                 die("Could not open /proc/net/wireless\n");
 401         (void)read(fd, buf, sizeof(buf));
 402         (void)close(fd);
 403
 404         interfaces = skip_character(buf, '\n', 1) + 1;
 405         while ((interfaces = skip_character(interfaces, '\n', 1)+1) < buf+strlen(buf)) {
 406                 while (isspace((int)*interfaces))
 407                         interfaces++;
 408                 if (!BEGINS_WITH(interfaces, wlan_interface))
 409                         continue;
 410                 int quality;
 411                 if (sscanf(interfaces, "%*[^:]: 0000 %d", &quality) != 1)
 412                         continue;
 413                 if ((quality == UCHAR_MAX) || (quality == 0)) {
 414                         if (use_colors)
 415                                 (void)snprintf(part, sizeof(part), "%sW: down", color("#FF0000"));
 416                         else (void)snprintf(part, sizeof(part), "W: down");
 417                 } else (void)snprintf(part, sizeof(part), "%sW: (%03d%%) %s",
 418                                 color("#00FF00"), quality, get_ip_address(wlan_interface));
 419                 return part;
 420         }
 421
 422         return part;
 423 }
 424
 425 /*
 426  * Combines ethernet IP addresses and speed (if requested) for displaying
 427  *
 428  */
 429 static char *get_eth_info() {
 430         static char part[512];
 431         const char *ip_address = get_ip_address(eth_interface);
 432         int ethspeed = 0;
 433
 434         if (get_ethspeed) {
 435 #ifdef LINUX
 436                 /* This code path requires root privileges */
 437                 struct ifreq ifr;
 438                 struct ethtool_cmd ecmd;
 439
 440                 ecmd.cmd = ETHTOOL_GSET;
 441                 (void)memset(&ifr, 0, sizeof(ifr));
 442                 ifr.ifr_data = (caddr_t)&ecmd;
 443                 (void)strcpy(ifr.ifr_name, eth_interface);
 444                 if (ioctl(general_socket, SIOCETHTOOL, &ifr) == 0)
 445                         ethspeed = (ecmd.speed == USHRT_MAX ? 0 : ecmd.speed);
 446                 else get_ethspeed = false;
 447 #endif
 448         }
 449
 450         if (ip_address == NULL)
 451                 (void)snprintf(part, sizeof(part), "E: down");
 452         else {
 453                 if (get_ethspeed)
 454                         (void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed);
 455                 else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
 456         }
 457
 458         return part;
 459 }
 460
 461 /*
 462  * Checks if the PID in path is still valid by checking:
 463  *  (Linux) if /proc/<pid> exists
 464  *  (NetBSD) if sysctl returns process infos for this pid
 465  *
 466  */
 467 static bool process_runs(const char *path) {
 468         char pidbuf[16];
 469         static glob_t globbuf;
 470         int fd;
 471         memset(pidbuf, 0, sizeof(pidbuf));
 472
 473         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 474                 die("glob() failed\n");
 475         fd = open((globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path), O_RDONLY);
 476         globfree(&globbuf);
 477         if (fd < 0)
 478                 return false;
 479         (void)read(fd, pidbuf, sizeof(pidbuf));
 480         (void)close(fd);
 481
 482 #ifdef LINUX
 483         struct stat statbuf;
 484         char procbuf[512];
 485         (void)snprintf(procbuf, sizeof(procbuf), "/proc/%ld", strtol(pidbuf, NULL, 10));
 486         return (stat(procbuf, &statbuf) >= 0);
 487 #else
 488         /* TODO: correctly check for NetBSD. Evaluate if this runs on OpenBSD/FreeBSD */
 489         struct kinfo_proc info;
 490         size_t length = sizeof(struct kinfo_proc);
 491         int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, strtol(pidbuf, NULL, 10) };
 492         if (sysctl(mib, 4, &info, &length, NULL, 0) < 0)
 493                 return false;
 494         return (length != 0);
 495 #endif
 496 }
 497
 498 /*
 499  * Reads the configuration from the given file
 500  *
 501  */
 502 static int load_configuration(const char *configfile) {
 503         #define OPT(x) else if (strcasecmp(dest_name, x) == 0)
 504
 505         /* check if the file exists */
 506         struct stat buf;
 507         if (stat(configfile, &buf) < 0)
 508                 return -1;
 509
 510         int result = 0;
 511         FILE *handle = fopen(configfile, "r");
 512         if (handle == NULL)
 513                 die("Could not open configfile\n");
 514         char dest_name[512], dest_value[512], whole_buffer[1026];
 515
 516         while (!feof(handle)) {
 517                 char *ret;
 518                 if ((ret = fgets(whole_buffer, 1024, handle)) == whole_buffer) {
 519                         /* sscanf implicitly strips whitespace */
 520                         if (sscanf(whole_buffer, "%s %[^\n]", dest_name, dest_value) < 1)
 521                                 continue;
 522                 } else if (ret != NULL)
 523                         die("Could not read line in configuration file\n");
 524
 525                 /* skip comments and empty lines */
 526                 if (dest_name[0] == '#' || strlen(dest_name) < 3)
 527                         continue;
 528
 529                 OPT("wlan")
 530                         wlan_interface = strdup(dest_value);
 531                 OPT("eth")
 532                         eth_interface = strdup(dest_value);
 533                 OPT("time_format")
 534                         time_format = strdup(dest_value);
 535                 OPT("battery_path") {
 536                         struct battery *new = calloc(1, sizeof(struct battery));
 537                         if (new == NULL)
 538                                 die("Could not allocate memory\n");
 539                         new->path = strdup(dest_value);
 540                         SIMPLEQ_INSERT_TAIL(&batteries, new, batteries);
 541                 } OPT("color")
 542                         use_colors = true;
 543                 OPT("get_ethspeed")
 544                         get_ethspeed = true;
 545                 OPT("normcolors")
 546                         wmii_normcolors = strdup(dest_value);
 547                 OPT("interval")
 548                         interval = atoi(dest_value);
 549                 OPT("wmii_path")
 550                 {
 551 #ifndef DZEN
 552                         static glob_t globbuf;
 553                         struct stat stbuf;
 554                         if (glob(dest_value, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 555                                 die("glob() failed\n");
 556                         wmii_path = strdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : dest_value);
 557                         globfree(&globbuf);
 558
 559                         if ((stat(wmii_path, &stbuf)) == -1) {
 560                                 fprintf(stderr, "Warning: wmii_path contains an invalid path\n");
 561                                 free(wmii_path);
 562                                 wmii_path = strdup(dest_value);
 563                         }
 564                         if (wmii_path[strlen(wmii_path)-1] != '/')
 565                                 die("wmii_path is not terminated by /\n");
 566 #endif
 567                 }
 568                 OPT("run_watch")
 569                 {
 570                         char *name = strdup(dest_value);
 571                         char *path = name;
 572                         while (*path != ' ')
 573                                 path++;
 574                         *(path++) = '\0';
 575                         num_run_watches += 2;
 576                         run_watches = realloc(run_watches, sizeof(char*) * num_run_watches);
 577                         run_watches[num_run_watches-2] = name;
 578                         run_watches[num_run_watches-1] = path;
 579                 }
 580                 OPT("order")
 581                 {
 582                         #define SET_ORDER(opt, idx) { if (strcasecmp(token, opt) == 0) sprintf(order[idx], "%d", c++); }
 583                         char *walk, *token;
 584                         int c = 0;
 585                         walk = token = dest_value;
 586                         while (*walk != '\0') {
 587                                 while ((*walk != ',') && (*walk != '\0'))
 588                                         walk++;
 589                                 *(walk++) = '\0';
 590                                 SET_ORDER("run", ORDER_RUN);
 591                                 SET_ORDER("wlan", ORDER_WLAN);
 592                                 SET_ORDER("eth", ORDER_ETH);
 593                                 SET_ORDER("battery", ORDER_BATTERY);
 594                                 SET_ORDER("load", ORDER_LOAD);
 595                                 SET_ORDER("time", ORDER_TIME);
 596                                 token = walk;
 597                                 while (isspace((int)(*token)))
 598                                         token++;
 599                         }
 600                 }
 601                 else
 602                 {
 603                         result = -2;
 604                         die("Unknown configfile option: %s\n", dest_name);
 605                 }
 606         }
 607         fclose(handle);
 608
 609 #ifndef DZEN
 610         if (wmii_path == NULL)
 611                 exit(EXIT_FAILURE);
 612 #endif
 613
 614         return result;
 615 }
 616
 617 int main(int argc, char *argv[]) {
 618         char part[512],
 619              pathbuf[512];
 620         unsigned int i;
 621
 622         char *configfile = PREFIX "/etc/i3status.conf";
 623         int o, option_index = 0;
 624         struct option long_options[] = {
 625                 {"config", required_argument, 0, 'c'},
 626                 {"help", no_argument, 0, 'h'},
 627                 {0, 0, 0, 0}
 628         };
 629
 630         SIMPLEQ_INIT(&batteries);
 631
 632         while ((o = getopt_long(argc, argv, "c:h", long_options, &option_index)) != -1)
 633                 if ((char)o == 'c')
 634                         configfile = optarg;
 635                 else if ((char)o == 'h') {
 636                         printf("i3status (c) 2008-2009 Michael Stapelberg\n"
 637                                 "Syntax: %s [-c <configfile>]\n", argv[0]);
 638                         return 0;
 639                 }
 640
 641         if (load_configuration(configfile) < 0)
 642                 return EXIT_FAILURE;
 643
 644         setup();
 645
 646         if ((general_socket = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
 647                 die("Could not create socket\n");
 648
 649         while (1) {
 650                 for (i = 0; i < num_run_watches; i += 2) {
 651                         bool running = process_runs(run_watches[i+1]);
 652                         if (use_colors)
 653                                 snprintf(part, sizeof(part), "%s%s: %s",
 654                                         (running ? color("#00FF00") : color("#FF0000")),
 655                                         run_watches[i],
 656                                         (running ? "yes" : "no"));
 657                         else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no"));
 658                         snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 659                         write_to_statusbar(pathbuf, part, false);
 660                 }
 661
 662                 if (wlan_interface)
 663                         write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info(), false);
 664                 if (eth_interface)
 665                         write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info(), false);
 666                 struct battery *current_battery;
 667                 SIMPLEQ_FOREACH(current_battery, &batteries, batteries) {
 668                         write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info(current_battery->path), false);
 669                 }
 670
 671                 /* Get load */
 672 #ifdef LINUX
 673                 int load_avg;
 674                 if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1)
 675                         die("Could not open /proc/loadavg\n");
 676                 (void)read(load_avg, part, sizeof(part));
 677                 (void)close(load_avg);
 678                 *skip_character(part, ' ', 3) = '\0';
 679 #else
 680                 /* TODO: correctly check for NetBSD, check if it works the same on *BSD */
 681                 struct loadavg load;
 682                 size_t length = sizeof(struct loadavg);
 683                 int mib[2] = { CTL_VM, VM_LOADAVG };
 684                 if (sysctl(mib, 2, &load, &length, NULL, 0) < 0)
 685                         die("Could not sysctl({ CTL_VM, VM_LOADAVG })\n");
 686                 double scale = load.fscale;
 687                 (void)snprintf(part, sizeof(part), "%.02f %.02f %.02f",
 688                                 (double)load.ldavg[0] / scale,
 689                                 (double)load.ldavg[1] / scale,
 690                                 (double)load.ldavg[2] / scale);
 691 #endif
 692                 write_to_statusbar(concat(order[ORDER_LOAD], "load"), part, !time_format);
 693
 694                 if (time_format) {
 695                         /* Get date & time */
 696                         time_t current_time = time(NULL);
 697                         struct tm *current_tm = localtime(&current_time);
 698                         (void)strftime(part, sizeof(part), time_format, current_tm);
 699                         write_to_statusbar(concat(order[ORDER_TIME], "time"), part, true);
 700                 }
 701
 702                 sleep(interval);
 703         }
 704 }