slstatus.c

   1 /* See LICENSE file for copyright and license details. */
   2
   3 #include <alsa/asoundlib.h>
   4 #include <err.h>
   5 #include <fcntl.h>
   6 #include <ifaddrs.h>
   7 #include <limits.h>
   8 #include <linux/wireless.h>
   9 #include <locale.h>
  10 #include <netdb.h>
  11 #include <pwd.h>
  12 #include <signal.h>
  13 #include <stdarg.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17 #include <sys/ioctl.h>
  18 #include <sys/stat.h>
  19 #include <sys/statvfs.h>
  20 #include <sys/socket.h>
  21 #include <sys/sysinfo.h>
  22 #include <sys/types.h>
  23 #include <time.h>
  24 #include <unistd.h>
  25 #include <X11/Xlib.h>
  26
  27 #undef strlcat
  28 #undef strlcpy
  29
  30 #include "extern/arg.h"
  31 #include "extern/strlcat.h"
  32 #include "extern/strlcpy.h"
  33 #include "extern/concat.h"
  34
  35 struct arg {
  36         char *(*func)();
  37         const char *fmt;
  38         const char *args;
  39 };
  40
  41 static char *smprintf(const char *fmt, ...);
  42 static char *battery_perc(const char *bat);
  43 static char *battery_state(const char *bat);
  44 static char *cpu_perc(void);
  45 static char *datetime(const char *fmt);
  46 static char *disk_free(const char *mnt);
  47 static char *disk_perc(const char *mnt);
  48 static char *disk_total(const char *mnt);
  49 static char *disk_used(const char *mnt);
  50 static char *entropy(void);
  51 static char *gid(void);
  52 static char *hostname(void);
  53 static char *ip(const char *iface);
  54 static char *load_avg(void);
  55 static char *ram_free(void);
  56 static char *ram_perc(void);
  57 static char *ram_used(void);
  58 static char *ram_total(void);
  59 static char *run_command(const char *cmd);
  60 static char *swap_free(void);
  61 static char *swap_perc(void);
  62 static char *swap_used(void);
  63 static char *swap_total(void);
  64 static char *temp(const char *file);
  65 static char *uid(void);
  66 static char *uptime(void);
  67 static char *username(void);
  68 static char *vol_perc(const char *card);
  69 static char *wifi_perc(const char *iface);
  70 static char *wifi_essid(const char *iface);
  71 static void set_status(const char *str);
  72 static void sighandler(const int signo);
  73 static void usage(void);
  74
  75 char *argv0;
  76 char concat[];
  77 static unsigned short int delay;
  78 static unsigned short int done;
  79 static unsigned short int dflag, oflag;
  80 static Display *dpy;
  81
  82 #include "config.h"
  83
  84 static char *
  85 smprintf(const char *fmt, ...)
  86 {
  87         va_list ap;
  88         char *ret;
  89         int len;
  90
  91         va_start(ap, fmt);
  92         len = vsnprintf(NULL, 0, fmt, ap);
  93         va_end(ap);
  94
  95         ret = malloc(++len);
  96         if (ret == NULL) {
  97                 err(1, "malloc");
  98         }
  99
 100         va_start(ap, fmt);
 101         vsnprintf(ret, len, fmt, ap);
 102         va_end(ap);
 103
 104         return ret;
 105 }
 106
 107 static char *
 108 battery_perc(const char *bat)
 109 {
 110         int perc;
 111         FILE *fp;
 112
 113         ccat(3, "/sys/class/power_supply/", bat, "/capacity");
 114         fp = fopen(concat, "r");
 115         if (fp == NULL) {
 116                 warn("Failed to open file %s", concat);
 117                 return smprintf(UNKNOWN_STR);
 118         }
 119         fscanf(fp, "%i", &perc);
 120         fclose(fp);
 121
 122         return smprintf("%d%%", perc);
 123 }
 124
 125 static char *
 126 battery_state(const char *bat)
 127 {
 128         char state[12];
 129         FILE *fp;
 130
 131         ccat(3, "/sys/class/power_supply/", bat, "/status");
 132         fp = fopen(concat, "r");
 133         if (fp == NULL) {
 134                 warn("Failed to open file %s", concat);
 135                 return smprintf(UNKNOWN_STR);
 136         }
 137         fscanf(fp, "%12s", state);
 138         fclose(fp);
 139
 140         if (strcmp(state, "Charging") == 0) {
 141                 return smprintf("+");
 142         } else if (strcmp(state, "Discharging") == 0) {
 143                 return smprintf("-");
 144         } else if (strcmp(state, "Full") == 0) {
 145                 return smprintf("=");
 146         } else {
 147                 return smprintf("?");
 148         }
 149 }
 150
 151 static char *
 152 cpu_perc(void)
 153 {
 154         int perc;
 155         long double a[4], b[4];
 156         FILE *fp;
 157
 158         fp = fopen("/proc/stat", "r");
 159         if (fp == NULL) {
 160                 warn("Failed to open file /proc/stat");
 161                 return smprintf(UNKNOWN_STR);
 162         }
 163         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
 164         fclose(fp);
 165
 166         delay = (UPDATE_INTERVAL - (UPDATE_INTERVAL - 1));
 167         sleep(delay);
 168
 169         fp = fopen("/proc/stat", "r");
 170         if (fp == NULL) {
 171                 warn("Failed to open file /proc/stat");
 172                 return smprintf(UNKNOWN_STR);
 173         }
 174         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
 175         fclose(fp);
 176
 177         perc = 100 * ((b[0]+b[1]+b[2]) - (a[0]+a[1]+a[2])) / ((b[0]+b[1]+b[2]+b[3]) - (a[0]+a[1]+a[2]+a[3]));
 178         return smprintf("%d%%", perc);
 179 }
 180
 181 static char *
 182 datetime(const char *fmt)
 183 {
 184         time_t t;
 185         char str[80];
 186
 187         t = time(NULL);
 188         if (strftime(str, sizeof(str), fmt, localtime(&t)) == 0) {
 189                 return smprintf(UNKNOWN_STR);
 190         }
 191
 192         return smprintf("%s", str);
 193 }
 194
 195 static char *
 196 disk_free(const char *mnt)
 197 {
 198         struct statvfs fs;
 199
 200         if (statvfs(mnt, &fs) < 0) {
 201                 warn("Failed to get filesystem info");
 202                 return smprintf(UNKNOWN_STR);
 203         }
 204
 205         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
 206 }
 207
 208 static char *
 209 disk_perc(const char *mnt)
 210 {
 211         int perc;
 212         struct statvfs fs;
 213
 214         if (statvfs(mnt, &fs) < 0) {
 215                 warn("Failed to get filesystem info");
 216                 return smprintf(UNKNOWN_STR);
 217         }
 218
 219         perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
 220
 221         return smprintf("%d%%", perc);
 222 }
 223
 224 static char *
 225 disk_total(const char *mnt)
 226 {
 227         struct statvfs fs;
 228
 229         if (statvfs(mnt, &fs) < 0) {
 230                 warn("Failed to get filesystem info");
 231                 return smprintf(UNKNOWN_STR);
 232         }
 233
 234         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
 235 }
 236
 237 static char *
 238 disk_used(const char *mnt)
 239 {
 240         struct statvfs fs;
 241
 242         if (statvfs(mnt, &fs) < 0) {
 243                 warn("Failed to get filesystem info");
 244                 return smprintf(UNKNOWN_STR);
 245         }
 246
 247         return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
 248 }
 249
 250 static char *
 251 entropy(void)
 252 {
 253         int num;
 254         FILE *fp;
 255
 256         fp= fopen("/proc/sys/kernel/random/entropy_avail", "r");
 257         if (fp == NULL) {
 258                 warn("Failed to open file /proc/sys/kernel/random/entropy_avail");
 259                 return smprintf(UNKNOWN_STR);
 260         }
 261         fscanf(fp, "%d", &num);
 262         fclose(fp);
 263
 264         return smprintf("%d", num);
 265 }
 266
 267 static char *
 268 gid(void)
 269 {
 270         return smprintf("%d", getgid());
 271 }
 272
 273 static char *
 274 hostname(void)
 275 {
 276         char buf[HOST_NAME_MAX];
 277
 278         if (gethostname(buf, sizeof(buf)) == -1) {
 279                 warn("hostname");
 280                 return smprintf(UNKNOWN_STR);
 281         }
 282
 283         return smprintf("%s", buf);
 284 }
 285
 286 static char *
 287 ip(const char *iface)
 288 {
 289         struct ifaddrs *ifaddr, *ifa;
 290         int s;
 291         char host[NI_MAXHOST];
 292
 293         if (getifaddrs(&ifaddr) == -1) {
 294                 warn("Failed to get IP address for interface %s", iface);
 295                 return smprintf(UNKNOWN_STR);
 296         }
 297
 298         for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
 299                 if (ifa->ifa_addr == NULL) {
 300                         continue;
 301                 }
 302                 s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
 303                 if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
 304                         if (s != 0) {
 305                                 warnx("Failed to get IP address for interface %s", iface);
 306                                 return smprintf(UNKNOWN_STR);
 307                         }
 308                         return smprintf("%s", host);
 309                 }
 310         }
 311
 312         freeifaddrs(ifaddr);
 313
 314         return smprintf(UNKNOWN_STR);
 315 }
 316
 317 static char *
 318 load_avg(void)
 319 {
 320         double avgs[3];
 321
 322         if (getloadavg(avgs, 3) < 0) {
 323                 warnx("Failed to get the load avg");
 324                 return smprintf(UNKNOWN_STR);
 325         }
 326
 327         return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
 328 }
 329
 330 static char *
 331 ram_free(void)
 332 {
 333         long free;
 334         FILE *fp;
 335
 336         fp = fopen("/proc/meminfo", "r");
 337         if (fp == NULL) {
 338                 warn("Failed to open file /proc/meminfo");
 339                 return smprintf(UNKNOWN_STR);
 340         }
 341         fscanf(fp, "MemFree: %ld kB\n", &free);
 342         fclose(fp);
 343
 344         return smprintf("%f", (float)free / 1024 / 1024);
 345 }
 346
 347 static char *
 348 ram_perc(void)
 349 {
 350         long total, free, buffers, cached;
 351         FILE *fp;
 352
 353         fp = fopen("/proc/meminfo", "r");
 354         if (fp == NULL) {
 355                 warn("Failed to open file /proc/meminfo");
 356                 return smprintf(UNKNOWN_STR);
 357         }
 358         fscanf(fp, "MemTotal: %ld kB\n", &total);
 359         fscanf(fp, "MemFree: %ld kB\n", &free);
 360         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 361         fscanf(fp, "Cached: %ld kB\n", &cached);
 362         fclose(fp);
 363
 364         return smprintf("%d%%", 100 * ((total - free) - (buffers + cached)) / total);
 365 }
 366
 367 static char *
 368 ram_total(void)
 369 {
 370         long total;
 371         FILE *fp;
 372
 373         fp = fopen("/proc/meminfo", "r");
 374         if (fp == NULL) {
 375                 warn("Failed to open file /proc/meminfo");
 376                 return smprintf(UNKNOWN_STR);
 377         }
 378         fscanf(fp, "MemTotal: %ld kB\n", &total);
 379         fclose(fp);
 380
 381         return smprintf("%f", (float)total / 1024 / 1024);
 382 }
 383
 384 static char *
 385 ram_used(void)
 386 {
 387         long free, total, buffers, cached;
 388         FILE *fp;
 389
 390         fp = fopen("/proc/meminfo", "r");
 391         if (fp == NULL) {
 392                 warn("Failed to open file /proc/meminfo");
 393                 return smprintf(UNKNOWN_STR);
 394         }
 395         fscanf(fp, "MemTotal: %ld kB\n", &total);
 396         fscanf(fp, "MemFree: %ld kB\n", &free);
 397         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 398         fscanf(fp, "Cached: %ld kB\n", &cached);
 399         fclose(fp);
 400
 401         return smprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024);
 402 }
 403
 404 static char *
 405 run_command(const char *cmd)
 406 {
 407         FILE *fp;
 408         char buf[1024] = "n/a";
 409
 410         fp = popen(cmd, "r");
 411         if (fp == NULL) {
 412                 warn("Failed to get command output for %s", cmd);
 413                 return smprintf(UNKNOWN_STR);
 414         }
 415         fgets(buf, sizeof(buf)-1, fp);
 416         pclose(fp);
 417
 418         buf[strlen(buf)] = '\0';
 419         strtok(buf, "\n");
 420
 421         return smprintf("%s", buf);
 422 }
 423
 424 static char *
 425 swap_free(void)
 426 {
 427         long total, free;
 428         FILE *fp;
 429         char buf[2048];
 430         size_t bytes_read;
 431         char *match;
 432
 433         fp = fopen("/proc/meminfo", "r");
 434         if (fp == NULL) {
 435                 warn("Failed to open file /proc/meminfo");
 436                 return smprintf(UNKNOWN_STR);
 437         }
 438         bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
 439         buf[bytes_read] = '\0';
 440         fclose(fp);
 441         if (bytes_read == 0 || bytes_read == sizeof(buf)) {
 442                 warn("Failed to read /proc/meminfo\n");
 443                 return smprintf(UNKNOWN_STR);
 444         }
 445
 446         match = strstr(buf, "SwapTotal");
 447         sscanf(match, "SwapTotal: %ld kB\n", &total);
 448         if (total == 0) {
 449                 return smprintf(UNKNOWN_STR);
 450         }
 451
 452         match = strstr(buf, "SwapFree");
 453         sscanf(match, "SwapFree: %ld kB\n", &free);
 454
 455         return smprintf("%f", (float)free / 1024 / 1024);
 456 }
 457
 458 static char *
 459 swap_perc(void)
 460 {
 461         long total, free, cached;
 462         FILE *fp;
 463         char buf[2048];
 464         size_t bytes_read;
 465         char *match;
 466
 467         fp = fopen("/proc/meminfo", "r");
 468         if (fp == NULL) {
 469                 warn("Failed to open file /proc/meminfo");
 470                 return smprintf(UNKNOWN_STR);
 471         }
 472         bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
 473         buf[bytes_read] = '\0';
 474         fclose(fp);
 475         if (bytes_read == 0 || bytes_read == sizeof(buf)) {
 476                 warn("Failed to read /proc/meminfo\n");
 477                 return smprintf(UNKNOWN_STR);
 478         }
 479
 480         match = strstr(buf, "SwapTotal");
 481         sscanf(match, "SwapTotal: %ld kB\n", &total);
 482         if (total == 0) {
 483                 return smprintf(UNKNOWN_STR);
 484         }
 485
 486         match = strstr(buf, "SwapCached");
 487         sscanf(match, "SwapCached: %ld kB\n", &cached);
 488
 489         match = strstr(buf, "SwapFree");
 490         sscanf(match, "SwapFree: %ld kB\n", &free);
 491
 492         return smprintf("%d%%", 100 * (total - free - cached) / total);
 493 }
 494
 495 static char *
 496 swap_total(void)
 497 {
 498         long total;
 499         FILE *fp;
 500         char buf[2048];
 501         size_t bytes_read;
 502         char *match;
 503
 504         fp = fopen("/proc/meminfo", "r");
 505         if (fp == NULL) {
 506                 warn("Failed to open file /proc/meminfo");
 507                 return smprintf(UNKNOWN_STR);
 508         }
 509         bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
 510         buf[bytes_read] = '\0';
 511         fclose(fp);
 512         if (bytes_read == 0 || bytes_read == sizeof(buf)) {
 513                 warn("Failed to read /proc/meminfo\n");
 514                 return smprintf(UNKNOWN_STR);
 515         }
 516
 517         match = strstr(buf, "SwapTotal");
 518         sscanf(match, "SwapTotal: %ld kB\n", &total);
 519         if (total == 0) {
 520                 return smprintf(UNKNOWN_STR);
 521         }
 522
 523         return smprintf("%f", (float)total / 1024 / 1024);
 524 }
 525
 526 static char *
 527 swap_used(void)
 528 {
 529         long total, free, cached;
 530         FILE *fp;
 531         char buf[2048];
 532         size_t bytes_read;
 533         char *match;
 534
 535         fp = fopen("/proc/meminfo", "r");
 536         if (fp == NULL) {
 537                 warn("Failed to open file /proc/meminfo");
 538                 return smprintf(UNKNOWN_STR);
 539         }
 540         bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
 541         buf[bytes_read] = '\0';
 542         fclose(fp);
 543         if (bytes_read == 0 || bytes_read == sizeof(buf)) {
 544                 warn("Failed to read /proc/meminfo\n");
 545                 return smprintf(UNKNOWN_STR);
 546         }
 547
 548         match = strstr(buf, "SwapTotal");
 549         sscanf(match, "SwapTotal: %ld kB\n", &total);
 550         if (total == 0) {
 551                 return smprintf(UNKNOWN_STR);
 552         }
 553
 554         match = strstr(buf, "SwapCached");
 555         sscanf(match, "SwapCached: %ld kB\n", &cached);
 556
 557         match = strstr(buf, "SwapFree");
 558         sscanf(match, "SwapFree: %ld kB\n", &free);
 559
 560         return smprintf("%f", (float)(total - free - cached) / 1024 / 1024);
 561 }
 562
 563 static char *
 564 temp(const char *file)
 565 {
 566         int temp;
 567         FILE *fp;
 568
 569         fp = fopen(file, "r");
 570         if (fp == NULL) {
 571                 warn("Failed to open file %s", file);
 572                 return smprintf(UNKNOWN_STR);
 573         }
 574         fscanf(fp, "%d", &temp);
 575         fclose(fp);
 576
 577         return smprintf("%d°C", temp / 1000);
 578 }
 579
 580 static char *
 581 uptime(void)
 582 {
 583         struct sysinfo info;
 584         int h = 0;
 585         int m = 0;
 586
 587         sysinfo(&info);
 588         h = info.uptime / 3600;
 589         m = (info.uptime - h * 3600 ) / 60;
 590
 591         return smprintf("%dh %dm", h, m);
 592 }
 593
 594 static char *
 595 username(void)
 596 {
 597         uid_t uid = geteuid();
 598         struct passwd *pw = getpwuid(uid);
 599
 600         if (pw == NULL) {
 601                 warn("Failed to get username");
 602                 return smprintf(UNKNOWN_STR);
 603         }
 604
 605         return smprintf("%s", pw->pw_name);
 606 }
 607
 608 static char *
 609 uid(void)
 610 {
 611         return smprintf("%d", geteuid());
 612 }
 613
 614
 615 static char *
 616 vol_perc(const char *card)
 617 {
 618         int mute;
 619         long int vol, max, min;
 620         snd_mixer_t *handle;
 621         snd_mixer_elem_t *elem;
 622         snd_mixer_selem_id_t *s_elem;
 623
 624         snd_mixer_open(&handle, 0);
 625         snd_mixer_attach(handle, card);
 626         snd_mixer_selem_register(handle, NULL, NULL);
 627         snd_mixer_load(handle);
 628         snd_mixer_selem_id_malloc(&s_elem);
 629         snd_mixer_selem_id_set_name(s_elem, "Master");
 630         elem = snd_mixer_find_selem(handle, s_elem);
 631
 632         if (elem == NULL) {
 633                 snd_mixer_selem_id_free(s_elem);
 634                 snd_mixer_close(handle);
 635                 warn("Failed to get volume percentage for %s", card);
 636                 return smprintf(UNKNOWN_STR);
 637         }
 638
 639         snd_mixer_handle_events(handle);
 640         snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
 641         snd_mixer_selem_get_playback_volume(elem, 0, &vol);
 642         snd_mixer_selem_get_playback_switch(elem, 0, &mute);
 643
 644         snd_mixer_selem_id_free(s_elem);
 645         snd_mixer_close(handle);
 646
 647         if (!mute)
 648                 return smprintf("mute");
 649         else if (max == 0)
 650                 return smprintf("0%%");
 651         else
 652                 return smprintf("%lu%%", ((uint_fast16_t)(vol * 100) / max));
 653 }
 654
 655 static char *
 656 wifi_perc(const char *iface)
 657 {
 658         int perc;
 659         char buf[255];
 660         char *datastart;
 661         char status[5];
 662         FILE *fp;
 663
 664         ccat(3, "/sys/class/net/", iface, "/operstate");
 665         fp = fopen(concat, "r");
 666         if (fp == NULL) {
 667                 warn("Failed to open file %s", concat);
 668                 return smprintf(UNKNOWN_STR);
 669         }
 670         fgets(status, 5, fp);
 671         fclose(fp);
 672         if(strcmp(status, "up\n") != 0) {
 673                 return smprintf(UNKNOWN_STR);
 674         }
 675
 676         fp = fopen("/proc/net/wireless", "r");
 677         if (fp == NULL) {
 678                 warn("Failed to open file /proc/net/wireless");
 679                 return smprintf(UNKNOWN_STR);
 680         }
 681         ccat(2, iface, ":");
 682         fgets(buf, sizeof(buf), fp);
 683         fgets(buf, sizeof(buf), fp);
 684         fgets(buf, sizeof(buf), fp);
 685         fclose(fp);
 686
 687         datastart = strstr(buf, concat);
 688         if (datastart != NULL) {
 689                 datastart = strstr(buf, ":");
 690                 sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &perc);
 691         }
 692
 693         return smprintf("%d%%", perc);
 694 }
 695
 696 static char *
 697 wifi_essid(const char *iface)
 698 {
 699         char id[IW_ESSID_MAX_SIZE+1];
 700         int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
 701         struct iwreq wreq;
 702
 703         memset(&wreq, 0, sizeof(struct iwreq));
 704         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 705         sprintf(wreq.ifr_name, iface);
 706         if (sockfd == -1) {
 707                 warn("Failed to get ESSID for interface %s", iface);
 708                 return smprintf(UNKNOWN_STR);
 709         }
 710         wreq.u.essid.pointer = id;
 711         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 712                 warn("Failed to get ESSID for interface %s", iface);
 713                 return smprintf(UNKNOWN_STR);
 714         }
 715
 716         close(sockfd);
 717
 718         if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
 719                 return smprintf(UNKNOWN_STR);
 720         else
 721                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 722 }
 723
 724 static void
 725 set_status(const char *str)
 726 {
 727         XStoreName(dpy, DefaultRootWindow(dpy), str);
 728         XSync(dpy, False);
 729 }
 730
 731 static void
 732 sighandler(const int signo)
 733 {
 734         if (signo == SIGTERM || signo == SIGINT) {
 735                 done = 1;
 736         }
 737 }
 738
 739 static void
 740 usage(void)
 741 {
 742         fprintf(stderr, "usage: %s [-dhov]\n", argv0);
 743         exit(1);
 744 }
 745
 746 int
 747 main(int argc, char *argv[])
 748 {
 749         unsigned short int i;
 750         char status_string[4096];
 751         char *res, *element;
 752         struct arg argument;
 753         struct sigaction act;
 754
 755         ARGBEGIN {
 756                 case 'd':
 757                         dflag = 1;
 758                         break;
 759                 case 'o':
 760                         oflag = 1;
 761                         break;
 762                 case 'v':
 763                         printf("slstatus %s (C) 2016 slstatus engineers\n", VERSION);
 764                         return 0;
 765                 default:
 766                         usage();
 767         } ARGEND
 768
 769         if (dflag && oflag) {
 770                 usage();
 771         }
 772         if (dflag && daemon(1, 1) < 0) {
 773                 err(1, "daemon");
 774         }
 775
 776         memset(&act, 0, sizeof(act));
 777         act.sa_handler = sighandler;
 778         sigaction(SIGINT,  &act, 0);
 779         sigaction(SIGTERM, &act, 0);
 780
 781         if (!oflag) {
 782                 dpy = XOpenDisplay(NULL);
 783         }
 784
 785         setlocale(LC_ALL, "");
 786
 787         while (!done) {
 788                 status_string[0] = '\0';
 789
 790                 for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 791                         argument = args[i];
 792                         if (argument.args == NULL) {
 793                                 res = argument.func();
 794                         } else {
 795                                 res = argument.func(argument.args);
 796                         }
 797                         element = smprintf(argument.fmt, res);
 798                         if (element == NULL) {
 799                                 element = smprintf(UNKNOWN_STR);
 800                                 warnx("Failed to format output");
 801                         }
 802                         strlcat(status_string, element, sizeof(status_string));
 803                         free(res);
 804                         free(element);
 805                 }
 806
 807                 if (!oflag) {
 808                         set_status(status_string);
 809                 } else {
 810                         printf("%s\n", status_string);
 811                 }
 812
 813                 /*
 814                  * subtract delay time spend in function
 815                  * calls from the actual global delay time
 816                  */
 817                 sleep(UPDATE_INTERVAL - delay);
 818                 delay = 0;
 819         }
 820
 821         if (!oflag) {
 822                 set_status(NULL);
 823                 XCloseDisplay(dpy);
 824         }
 825
 826         return 0;
 827 }