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 static int max(int a, int b) {
  97         return (a > b ? a : b);
  98 }
  99
 100 /*
 101  * This function just concats two strings in place, it should only be used
 102  * for concatting order to the name of a file or concatting color codes.
 103  * Otherwise, the buffer size would have to be increased.
 104  *
 105  */
 106 static char *concat(const char *str1, const char *str2) {
 107         static char concatbuf[32];
 108         (void)snprintf(concatbuf, sizeof(concatbuf), "%s%s", str1, str2);
 109         return concatbuf;
 110 }
 111
 112 /*
 113  * Returns the correct color format for dzen (^fg(color)) or wmii (color <normcolors>)
 114  *
 115  */
 116 static char *color(const char *colorstr) {
 117         static char colorbuf[32];
 118 #ifdef DZEN
 119         (void)snprintf(colorbuf, sizeof(colorbuf), "^fg(%s)", colorstr);
 120 #else
 121         (void)snprintf(colorbuf, sizeof(colorbuf), "%s %s ", colorstr, wmii_normcolors);
 122 #endif
 123         return colorbuf;
 124 }
 125
 126 /*
 127  * Cleans wmii's /rbar directory by deleting all regular files
 128  *
 129  */
 130 static void cleanup_rbar_dir() {
 131 #ifdef DZEN
 132         return;
 133 #endif
 134         struct dirent *ent;
 135         DIR *dir;
 136         char pathbuf[strlen(wmii_path)+256+1];
 137
 138         if ((dir = opendir(wmii_path)) == NULL)
 139                 exit(EXIT_FAILURE);
 140
 141         while ((ent = readdir(dir)) != NULL) {
 142                 if (ent->d_type == DT_REG) {
 143                         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, ent->d_name);
 144                         if (unlink(pathbuf) == -1)
 145                                 exit(EXIT_FAILURE);
 146                 }
 147         }
 148
 149         (void)closedir(dir);
 150 }
 151
 152 /*
 153  * Creates the specified file in wmii's /rbar directory with
 154  * correct modes and initializes colors if colormode is enabled
 155  *
 156  */
 157 static void create_file(const char *name) {
 158 #ifdef DZEN
 159         return;
 160 #endif
 161         char pathbuf[strlen(wmii_path)+256+1];
 162         int fd;
 163         int flags = O_CREAT | O_WRONLY;
 164         struct stat statbuf;
 165
 166         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 167
 168         /* Overwrite file's contents if it exists */
 169         if (stat(pathbuf, &statbuf) >= 0)
 170                 flags |= O_TRUNC;
 171
 172         if ((fd = open(pathbuf, flags, S_IRUSR | S_IWUSR)) < 0)
 173                 exit(EXIT_FAILURE);
 174         if (use_colors) {
 175                 char *tmp = color("#888888");
 176                 if (write(fd, tmp, strlen(tmp)) != (ssize_t)strlen(tmp))
 177                         exit(EXIT_FAILURE);
 178         }
 179         (void)close(fd);
 180 }
 181
 182 /*
 183  * Waits until wmii_path/rbar exists (= the filesystem gets mounted),
 184  * cleans up all files and creates the needed files
 185  *
 186  */
 187 static void setup(void) {
 188         unsigned int i;
 189         char pathbuf[512];
 190
 191 #ifndef DZEN
 192         struct stat statbuf;
 193         /* Wait until wmii_path/rbar exists */
 194         for (; stat(wmii_path, &statbuf) < 0; sleep(interval));
 195 #endif
 196
 197         cleanup_rbar_dir();
 198         if (wlan_interface)
 199                 create_file(concat(order[ORDER_WLAN],"wlan"));
 200         if (eth_interface)
 201                 create_file(concat(order[ORDER_ETH],"eth"));
 202         if (battery_path)
 203                 create_file(concat(order[ORDER_BATTERY],"battery"));
 204         create_file(concat(order[ORDER_LOAD],"load"));
 205         if (time_format)
 206                 create_file(concat(order[ORDER_TIME],"time"));
 207         for (i = 0; i < num_run_watches; i += 2) {
 208                 snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 209                 create_file(pathbuf);
 210         }
 211 }
 212
 213 /*
 214  * Writes the given message in the corresponding file in wmii's /rbar directory
 215  *
 216  */
 217 static void write_to_statusbar(const char *name, const char *message, bool final_entry) {
 218 #ifdef DZEN
 219         if (final_entry) {
 220                 (void)printf("%s^p(6)\n", message);
 221                 fflush(stdout);
 222                 return;
 223         }
 224         (void)printf("%s" BAR, message);
 225         return;
 226 #endif
 227
 228         char pathbuf[strlen(wmii_path)+256+1];
 229         int fd;
 230
 231         (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s", wmii_path, name);
 232         if ((fd = open(pathbuf, O_RDWR)) == -1) {
 233                 /* Try to re-setup stuff and just continue */
 234                 setup();
 235                 return;
 236         }
 237         if (write(fd, message, strlen(message)) != (ssize_t)strlen(message))
 238                 exit(EXIT_FAILURE);
 239         (void)close(fd);
 240 }
 241
 242 /*
 243  * Writes an errormessage to statusbar
 244  *
 245  */
 246 static void write_error_to_statusbar(const char *message) {
 247         cleanup_rbar_dir();
 248         create_file("error");
 249         write_to_statusbar("error", message, true);
 250 }
 251
 252 /*
 253  * Write errormessage to statusbar and exit
 254  *
 255  */
 256 void die(const char *fmt, ...) {
 257         if (wmii_path != NULL) {
 258                 char buffer[512];
 259                 va_list ap;
 260                 va_start(ap, fmt);
 261                 (void)vsnprintf(buffer, sizeof(buffer), fmt, ap);
 262                 va_end(ap);
 263
 264                 write_error_to_statusbar(buffer);
 265         }
 266         exit(EXIT_FAILURE);
 267 }
 268
 269 /*
 270  * Skip the given character for exactly 'amount' times, returns
 271  * a pointer to the first non-'character' character in 'input'.
 272  *
 273  */
 274 static char *skip_character(char *input, char character, int amount) {
 275         char *walk;
 276         size_t len = strlen(input);
 277         int blanks = 0;
 278
 279         for (walk = input; ((size_t)(walk - input) < len) && (blanks < amount); walk++)
 280                 if (*walk == character)
 281                         blanks++;
 282
 283         return (walk == input ? walk : walk-1);
 284 }
 285
 286 /*
 287  * Get battery information from /sys. Note that it uses the design capacity to
 288  * calculate the percentage, not the last full capacity, so you can see how
 289  * worn off your battery is.
 290  *
 291  */
 292 static char *get_battery_info(const char *path) {
 293         char buf[1024];
 294         static char part[512];
 295         char *walk, *last;
 296         int fd;
 297         int full_design = -1,
 298             remaining = -1,
 299             present_rate = -1;
 300         charging_status_t status = CS_DISCHARGING;
 301
 302         if ((fd = open(path, O_RDONLY)) == -1)
 303                 return "No battery found";
 304
 305         memset(part, 0, sizeof(part));
 306         (void)read(fd, buf, sizeof(buf));
 307         for (walk = buf, last = buf; (walk-buf) < 1024; walk++)
 308                 if (*walk == '=') {
 309                         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN") ||
 310                             BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN"))
 311                                 full_design = atoi(walk+1);
 312                         else if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
 313                                  BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
 314                                 remaining = atoi(walk+1);
 315                         else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
 316                                 present_rate = atoi(walk+1);
 317                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 318                                 status = CS_CHARGING;
 319                         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 320                                 status = CS_FULL;
 321                 } else if (*walk == '\n')
 322                         last = walk+1;
 323         (void)close(fd);
 324
 325         if ((full_design == 1) || (remaining == -1))
 326                 return part;
 327
 328         if (present_rate > 0) {
 329                 float remaining_time;
 330                 int seconds, hours, minutes;
 331                 if (status == CS_CHARGING)
 332                         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 333                 else if (status == CS_DISCHARGING)
 334                         remaining_time = ((float)remaining / (float)present_rate);
 335                 else remaining_time = 0;
 336
 337                 seconds = (int)(remaining_time * 3600.0);
 338                 hours = seconds / 3600;
 339                 seconds -= (hours * 3600);
 340                 minutes = seconds / 60;
 341                 seconds -= (minutes * 60);
 342
 343                 (void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
 344                         (status == CS_CHARGING ? "CHR" :
 345                          (status == CS_DISCHARGING ? "BAT" : "FULL")),
 346                         (((float)remaining / (float)full_design) * 100),
 347                         max(hours, 0), max(minutes, 0), max(seconds, 0));
 348         } else {
 349                 (void)snprintf(part, sizeof(part), "%s %.02f%%",
 350                         (status == CS_CHARGING ? "CHR" :
 351                          (status == CS_DISCHARGING ? "BAT" : "FULL")),
 352                         (((float)remaining / (float)full_design) * 100));
 353         }
 354         return part;
 355 }
 356
 357 /*
 358  * Return the IP address for the given interface or "no IP" if the
 359  * interface is up and running but hasn't got an IP address yet
 360  *
 361  */
 362 static const char *get_ip_address(const char *interface) {
 363         static char part[512];
 364         struct ifreq ifr;
 365         struct sockaddr_in addr;
 366         socklen_t len = sizeof(struct sockaddr_in);
 367         memset(part, 0, sizeof(part));
 368
 369         /* First check if the interface is running */
 370         (void)strcpy(ifr.ifr_name, interface);
 371         if (ioctl(general_socket, SIOCGIFFLAGS, &ifr) < 0 ||
 372             !(ifr.ifr_flags & IFF_RUNNING))
 373                 return NULL;
 374
 375         /* Interface is up, get the IP address */
 376         (void)strcpy(ifr.ifr_name, interface);
 377         ifr.ifr_addr.sa_family = AF_INET;
 378         if (ioctl(general_socket, SIOCGIFADDR, &ifr) < 0)
 379                 return "no IP";
 380
 381         memcpy(&addr, &ifr.ifr_addr, len);
 382         (void)inet_ntop(AF_INET, &addr.sin_addr.s_addr, part, len);
 383         if (strlen(part) == 0)
 384                 (void)snprintf(part, sizeof(part), "no IP");
 385
 386         return part;
 387 }
 388
 389 /*
 390  * Just parses /proc/net/wireless looking for lines beginning with
 391  * wlan_interface, extracting the quality of the link and adding the
 392  * current IP address of wlan_interface.
 393  *
 394  */
 395 static char *get_wireless_info() {
 396         char buf[1024];
 397         static char part[512];
 398         char *interfaces;
 399         int fd;
 400         memset(buf, 0, sizeof(buf));
 401         memset(part, 0, sizeof(part));
 402
 403         if ((fd = open("/proc/net/wireless", O_RDONLY)) == -1)
 404                 die("Could not open /proc/net/wireless\n");
 405         (void)read(fd, buf, sizeof(buf));
 406         (void)close(fd);
 407
 408         interfaces = skip_character(buf, '\n', 1) + 1;
 409         while ((interfaces = skip_character(interfaces, '\n', 1)+1) < buf+strlen(buf)) {
 410                 while (isspace((int)*interfaces))
 411                         interfaces++;
 412                 if (!BEGINS_WITH(interfaces, wlan_interface))
 413                         continue;
 414                 int quality;
 415                 if (sscanf(interfaces, "%*[^:]: 0000 %d", &quality) != 1)
 416                         continue;
 417                 if ((quality == UCHAR_MAX) || (quality == 0)) {
 418                         if (use_colors)
 419                                 (void)snprintf(part, sizeof(part), "%sW: down", color("#FF0000"));
 420                         else (void)snprintf(part, sizeof(part), "W: down");
 421                 } else (void)snprintf(part, sizeof(part), "%sW: (%03d%%) %s",
 422                                 color("#00FF00"), quality, get_ip_address(wlan_interface));
 423                 return part;
 424         }
 425
 426         return part;
 427 }
 428
 429 /*
 430  * Combines ethernet IP addresses and speed (if requested) for displaying
 431  *
 432  */
 433 static char *get_eth_info() {
 434         static char part[512];
 435         const char *ip_address = get_ip_address(eth_interface);
 436         int ethspeed = 0;
 437
 438         if (get_ethspeed) {
 439 #ifdef LINUX
 440                 /* This code path requires root privileges */
 441                 struct ifreq ifr;
 442                 struct ethtool_cmd ecmd;
 443
 444                 ecmd.cmd = ETHTOOL_GSET;
 445                 (void)memset(&ifr, 0, sizeof(ifr));
 446                 ifr.ifr_data = (caddr_t)&ecmd;
 447                 (void)strcpy(ifr.ifr_name, eth_interface);
 448                 if (ioctl(general_socket, SIOCETHTOOL, &ifr) == 0)
 449                         ethspeed = (ecmd.speed == USHRT_MAX ? 0 : ecmd.speed);
 450                 else get_ethspeed = false;
 451 #endif
 452         }
 453
 454         if (ip_address == NULL)
 455                 (void)snprintf(part, sizeof(part), "E: down");
 456         else {
 457                 if (get_ethspeed)
 458                         (void)snprintf(part, sizeof(part), "E: %s (%d Mbit/s)", ip_address, ethspeed);
 459                 else (void)snprintf(part, sizeof(part), "E: %s", ip_address);
 460         }
 461
 462         return part;
 463 }
 464
 465 /*
 466  * Checks if the PID in path is still valid by checking:
 467  *  (Linux) if /proc/<pid> exists
 468  *  (NetBSD) if sysctl returns process infos for this pid
 469  *
 470  */
 471 static bool process_runs(const char *path) {
 472         char pidbuf[16];
 473         static glob_t globbuf;
 474         int fd;
 475         memset(pidbuf, 0, sizeof(pidbuf));
 476
 477         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 478                 die("glob() failed\n");
 479         fd = open((globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path), O_RDONLY);
 480         globfree(&globbuf);
 481         if (fd < 0)
 482                 return false;
 483         (void)read(fd, pidbuf, sizeof(pidbuf));
 484         (void)close(fd);
 485
 486 #ifdef LINUX
 487         struct stat statbuf;
 488         char procbuf[512];
 489         (void)snprintf(procbuf, sizeof(procbuf), "/proc/%ld", strtol(pidbuf, NULL, 10));
 490         return (stat(procbuf, &statbuf) >= 0);
 491 #else
 492         /* TODO: correctly check for NetBSD. Evaluate if this runs on OpenBSD/FreeBSD */
 493         struct kinfo_proc info;
 494         size_t length = sizeof(struct kinfo_proc);
 495         int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, strtol(pidbuf, NULL, 10) };
 496         if (sysctl(mib, 4, &info, &length, NULL, 0) < 0)
 497                 return false;
 498         return (length != 0);
 499 #endif
 500 }
 501
 502 /*
 503  * Reads the configuration from the given file
 504  *
 505  */
 506 static int load_configuration(const char *configfile) {
 507         #define OPT(x) else if (strcasecmp(dest_name, x) == 0)
 508
 509         /* check if the file exists */
 510         struct stat buf;
 511         if (stat(configfile, &buf) < 0)
 512                 return -1;
 513
 514         int result = 0;
 515         FILE *handle = fopen(configfile, "r");
 516         if (handle == NULL)
 517                 die("Could not open configfile\n");
 518         char dest_name[512], dest_value[512], whole_buffer[1026];
 519
 520         while (!feof(handle)) {
 521                 char *ret;
 522                 if ((ret = fgets(whole_buffer, 1024, handle)) == whole_buffer) {
 523                         /* sscanf implicitly strips whitespace */
 524                         if (sscanf(whole_buffer, "%s %[^\n]", dest_name, dest_value) < 1)
 525                                 continue;
 526                 } else if (ret != NULL)
 527                         die("Could not read line in configuration file\n");
 528
 529                 /* skip comments and empty lines */
 530                 if (dest_name[0] == '#' || strlen(dest_name) < 3)
 531                         continue;
 532
 533                 OPT("wlan")
 534                         wlan_interface = strdup(dest_value);
 535                 OPT("eth")
 536                         eth_interface = strdup(dest_value);
 537                 OPT("time_format")
 538                         time_format = strdup(dest_value);
 539                 OPT("battery_path") {
 540                         struct battery *new = calloc(1, sizeof(struct battery));
 541                         if (new == NULL)
 542                                 die("Could not allocate memory\n");
 543                         new->path = strdup(dest_value);
 544                         SIMPLEQ_INSERT_TAIL(&batteries, new, batteries);
 545                 } OPT("color")
 546                         use_colors = true;
 547                 OPT("get_ethspeed")
 548                         get_ethspeed = true;
 549                 OPT("normcolors")
 550                         wmii_normcolors = strdup(dest_value);
 551                 OPT("interval")
 552                         interval = atoi(dest_value);
 553                 OPT("wmii_path")
 554                 {
 555 #ifndef DZEN
 556                         static glob_t globbuf;
 557                         struct stat stbuf;
 558                         if (glob(dest_value, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
 559                                 die("glob() failed\n");
 560                         wmii_path = strdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : dest_value);
 561                         globfree(&globbuf);
 562
 563                         if ((stat(wmii_path, &stbuf)) == -1) {
 564                                 fprintf(stderr, "Warning: wmii_path contains an invalid path\n");
 565                                 free(wmii_path);
 566                                 wmii_path = strdup(dest_value);
 567                         }
 568                         if (wmii_path[strlen(wmii_path)-1] != '/')
 569                                 die("wmii_path is not terminated by /\n");
 570 #endif
 571                 }
 572                 OPT("run_watch")
 573                 {
 574                         char *name = strdup(dest_value);
 575                         char *path = name;
 576                         while (*path != ' ')
 577                                 path++;
 578                         *(path++) = '\0';
 579                         num_run_watches += 2;
 580                         run_watches = realloc(run_watches, sizeof(char*) * num_run_watches);
 581                         run_watches[num_run_watches-2] = name;
 582                         run_watches[num_run_watches-1] = path;
 583                 }
 584                 OPT("order")
 585                 {
 586                         #define SET_ORDER(opt, idx) { if (strcasecmp(token, opt) == 0) sprintf(order[idx], "%d", c++); }
 587                         char *walk, *token;
 588                         int c = 0;
 589                         walk = token = dest_value;
 590                         while (*walk != '\0') {
 591                                 while ((*walk != ',') && (*walk != '\0'))
 592                                         walk++;
 593                                 *(walk++) = '\0';
 594                                 SET_ORDER("run", ORDER_RUN);
 595                                 SET_ORDER("wlan", ORDER_WLAN);
 596                                 SET_ORDER("eth", ORDER_ETH);
 597                                 SET_ORDER("battery", ORDER_BATTERY);
 598                                 SET_ORDER("load", ORDER_LOAD);
 599                                 SET_ORDER("time", ORDER_TIME);
 600                                 token = walk;
 601                                 while (isspace((int)(*token)))
 602                                         token++;
 603                         }
 604                 }
 605                 else
 606                 {
 607                         result = -2;
 608                         die("Unknown configfile option: %s\n", dest_name);
 609                 }
 610         }
 611         fclose(handle);
 612
 613 #ifndef DZEN
 614         if (wmii_path == NULL)
 615                 exit(EXIT_FAILURE);
 616 #endif
 617
 618         return result;
 619 }
 620
 621 int main(int argc, char *argv[]) {
 622         char part[512],
 623              pathbuf[512];
 624         unsigned int i;
 625
 626         char *configfile = PREFIX "/etc/i3status.conf";
 627         int o, option_index = 0;
 628         struct option long_options[] = {
 629                 {"config", required_argument, 0, 'c'},
 630                 {"help", no_argument, 0, 'h'},
 631                 {0, 0, 0, 0}
 632         };
 633
 634         SIMPLEQ_INIT(&batteries);
 635
 636         while ((o = getopt_long(argc, argv, "c:h", long_options, &option_index)) != -1)
 637                 if ((char)o == 'c')
 638                         configfile = optarg;
 639                 else if ((char)o == 'h') {
 640                         printf("i3status (c) 2008-2009 Michael Stapelberg\n"
 641                                 "Syntax: %s [-c <configfile>]\n", argv[0]);
 642                         return 0;
 643                 }
 644
 645         if (load_configuration(configfile) < 0)
 646                 return EXIT_FAILURE;
 647
 648         setup();
 649
 650         if ((general_socket = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
 651                 die("Could not create socket\n");
 652
 653         while (1) {
 654                 for (i = 0; i < num_run_watches; i += 2) {
 655                         bool running = process_runs(run_watches[i+1]);
 656                         if (use_colors)
 657                                 snprintf(part, sizeof(part), "%s%s: %s",
 658                                         (running ? color("#00FF00") : color("#FF0000")),
 659                                         run_watches[i],
 660                                         (running ? "yes" : "no"));
 661                         else snprintf(part, sizeof(part), "%s: %s", run_watches[i], (running ? "yes" : "no"));
 662                         snprintf(pathbuf, sizeof(pathbuf), "%s%s", order[ORDER_RUN], run_watches[i]);
 663                         write_to_statusbar(pathbuf, part, false);
 664                 }
 665
 666                 if (wlan_interface)
 667                         write_to_statusbar(concat(order[ORDER_WLAN], "wlan"), get_wireless_info(), false);
 668                 if (eth_interface)
 669                         write_to_statusbar(concat(order[ORDER_ETH], "eth"), get_eth_info(), false);
 670                 struct battery *current_battery;
 671                 SIMPLEQ_FOREACH(current_battery, &batteries, batteries) {
 672                         write_to_statusbar(concat(order[ORDER_BATTERY], "battery"), get_battery_info(current_battery->path), false);
 673                 }
 674
 675                 /* Get load */
 676 #ifdef LINUX
 677                 int load_avg;
 678                 if ((load_avg = open("/proc/loadavg", O_RDONLY)) == -1)
 679                         die("Could not open /proc/loadavg\n");
 680                 (void)read(load_avg, part, sizeof(part));
 681                 (void)close(load_avg);
 682                 *skip_character(part, ' ', 3) = '\0';
 683 #else
 684                 /* TODO: correctly check for NetBSD, check if it works the same on *BSD */
 685                 struct loadavg load;
 686                 size_t length = sizeof(struct loadavg);
 687                 int mib[2] = { CTL_VM, VM_LOADAVG };
 688                 if (sysctl(mib, 2, &load, &length, NULL, 0) < 0)
 689                         die("Could not sysctl({ CTL_VM, VM_LOADAVG })\n");
 690                 double scale = load.fscale;
 691                 (void)snprintf(part, sizeof(part), "%.02f %.02f %.02f",
 692                                 (double)load.ldavg[0] / scale,
 693                                 (double)load.ldavg[1] / scale,
 694                                 (double)load.ldavg[2] / scale);
 695 #endif
 696                 write_to_statusbar(concat(order[ORDER_LOAD], "load"), part, !time_format);
 697
 698                 if (time_format) {
 699                         /* Get date & time */
 700                         time_t current_time = time(NULL);
 701                         struct tm *current_tm = localtime(&current_time);
 702                         (void)strftime(part, sizeof(part), time_format, current_tm);
 703                         write_to_statusbar(concat(order[ORDER_TIME], "time"), part, true);
 704                 }
 705
 706                 sleep(interval);
 707         }
 708 }