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

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