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 <sys/utsname.h>
  24 #include <time.h>
  25 #include <unistd.h>
  26 #include <X11/Xlib.h>
  27
  28 #undef strlcat
  29 #undef strlcpy
  30
  31 #include "extern/arg.h"
  32 #include "extern/strlcat.h"
  33 #include "extern/strlcpy.h"
  34 #include "extern/concat.h"
  35
  36 struct arg {
  37         char *(*func)();
  38         const char *fmt;
  39         const char *args;
  40 };
  41
  42 static char *smprintf(const char *fmt, ...);
  43 static char *battery_perc(const char *bat);
  44 static char *battery_state(const char *bat);
  45 static char *cpu_perc(void);
  46 static char *datetime(const char *fmt);
  47 static char *disk_free(const char *mnt);
  48 static char *disk_perc(const char *mnt);
  49 static char *disk_total(const char *mnt);
  50 static char *disk_used(const char *mnt);
  51 static char *entropy(void);
  52 static char *gid(void);
  53 static char *hostname(void);
  54 static char *ip(const char *iface);
  55 static char *kernel_release(void);
  56 static char *load_avg(void);
  57 static char *ram_free(void);
  58 static char *ram_perc(void);
  59 static char *ram_used(void);
  60 static char *ram_total(void);
  61 static char *run_command(const char *cmd);
  62 static char *swap_free(void);
  63 static char *swap_perc(void);
  64 static char *swap_used(void);
  65 static char *swap_total(void);
  66 static char *temp(const char *file);
  67 static char *uid(void);
  68 static char *uptime(void);
  69 static char *username(void);
  70 static char *vol_perc(const char *card);
  71 static char *wifi_perc(const char *iface);
  72 static char *wifi_essid(const char *iface);
  73 static void set_status(const char *str);
  74 static void sighandler(const int signo);
  75 static void usage(void);
  76
  77 char *argv0;
  78 char concat[];
  79 static unsigned short int delay;
  80 static unsigned short int done;
  81 static unsigned short int dflag, oflag;
  82 static Display *dpy;
  83
  84 #include "config.h"
  85
  86 static char *
  87 smprintf(const char *fmt, ...)
  88 {
  89         va_list ap;
  90         char *ret;
  91         int len;
  92
  93         va_start(ap, fmt);
  94         len = vsnprintf(NULL, 0, fmt, ap);
  95         va_end(ap);
  96
  97         ret = malloc(++len);
  98         if (ret == NULL) {
  99                 err(1, "malloc");
 100         }
 101
 102         va_start(ap, fmt);
 103         vsnprintf(ret, len, fmt, ap);
 104         va_end(ap);
 105
 106         return ret;
 107 }
 108
 109 static char *
 110 battery_perc(const char *bat)
 111 {
 112         int perc;
 113         FILE *fp;
 114
 115         ccat(3, "/sys/class/power_supply/", bat, "/capacity");
 116         fp = fopen(concat, "r");
 117         if (fp == NULL) {
 118                 warn("Failed to open file %s", concat);
 119                 return smprintf(UNKNOWN_STR);
 120         }
 121         fscanf(fp, "%i", &perc);
 122         fclose(fp);
 123
 124         return smprintf("%d%%", perc);
 125 }
 126
 127 static char *
 128 battery_state(const char *bat)
 129 {
 130         char state[12];
 131         FILE *fp;
 132
 133         ccat(3, "/sys/class/power_supply/", bat, "/status");
 134         fp = fopen(concat, "r");
 135         if (fp == NULL) {
 136                 warn("Failed to open file %s", concat);
 137                 return smprintf(UNKNOWN_STR);
 138         }
 139         fscanf(fp, "%12s", state);
 140         fclose(fp);
 141
 142         if (strcmp(state, "Charging") == 0) {
 143                 return smprintf("+");
 144         } else if (strcmp(state, "Discharging") == 0) {
 145                 return smprintf("-");
 146         } else if (strcmp(state, "Full") == 0) {
 147                 return smprintf("=");
 148         } else {
 149                 return smprintf("?");
 150         }
 151 }
 152
 153 static char *
 154 cpu_perc(void)
 155 {
 156         int perc;
 157         long double a[4], b[4];
 158         FILE *fp;
 159
 160         fp = fopen("/proc/stat", "r");
 161         if (fp == NULL) {
 162                 warn("Failed to open file /proc/stat");
 163                 return smprintf(UNKNOWN_STR);
 164         }
 165         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
 166         fclose(fp);
 167
 168         delay = (UPDATE_INTERVAL - (UPDATE_INTERVAL - 1));
 169         sleep(delay);
 170
 171         fp = fopen("/proc/stat", "r");
 172         if (fp == NULL) {
 173                 warn("Failed to open file /proc/stat");
 174                 return smprintf(UNKNOWN_STR);
 175         }
 176         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
 177         fclose(fp);
 178
 179         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]));
 180         return smprintf("%d%%", perc);
 181 }
 182
 183 static char *
 184 datetime(const char *fmt)
 185 {
 186         time_t t;
 187         char str[80];
 188
 189         t = time(NULL);
 190         if (strftime(str, sizeof(str), fmt, localtime(&t)) == 0) {
 191                 return smprintf(UNKNOWN_STR);
 192         }
 193
 194         return smprintf("%s", str);
 195 }
 196
 197 static char *
 198 disk_free(const char *mnt)
 199 {
 200         struct statvfs fs;
 201
 202         if (statvfs(mnt, &fs) < 0) {
 203                 warn("Failed to get filesystem info");
 204                 return smprintf(UNKNOWN_STR);
 205         }
 206
 207         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
 208 }
 209
 210 static char *
 211 disk_perc(const char *mnt)
 212 {
 213         int perc;
 214         struct statvfs fs;
 215
 216         if (statvfs(mnt, &fs) < 0) {
 217                 warn("Failed to get filesystem info");
 218                 return smprintf(UNKNOWN_STR);
 219         }
 220
 221         perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
 222
 223         return smprintf("%d%%", perc);
 224 }
 225
 226 static char *
 227 disk_total(const char *mnt)
 228 {
 229         struct statvfs fs;
 230
 231         if (statvfs(mnt, &fs) < 0) {
 232                 warn("Failed to get filesystem info");
 233                 return smprintf(UNKNOWN_STR);
 234         }
 235
 236         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
 237 }
 238
 239 static char *
 240 disk_used(const char *mnt)
 241 {
 242         struct statvfs fs;
 243
 244         if (statvfs(mnt, &fs) < 0) {
 245                 warn("Failed to get filesystem info");
 246                 return smprintf(UNKNOWN_STR);
 247         }
 248
 249         return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
 250 }
 251
 252 static char *
 253 entropy(void)
 254 {
 255         int num;
 256         FILE *fp;
 257
 258         fp= fopen("/proc/sys/kernel/random/entropy_avail", "r");
 259         if (fp == NULL) {
 260                 warn("Failed to open file /proc/sys/kernel/random/entropy_avail");
 261                 return smprintf(UNKNOWN_STR);
 262         }
 263         fscanf(fp, "%d", &num);
 264         fclose(fp);
 265
 266         return smprintf("%d", num);
 267 }
 268
 269 static char *
 270 gid(void)
 271 {
 272         return smprintf("%d", getgid());
 273 }
 274
 275 static char *
 276 hostname(void)
 277 {
 278         char buf[HOST_NAME_MAX];
 279
 280         if (gethostname(buf, sizeof(buf)) == -1) {
 281                 warn("hostname");
 282                 return smprintf(UNKNOWN_STR);
 283         }
 284
 285         return smprintf("%s", buf);
 286 }
 287
 288 static char *
 289 ip(const char *iface)
 290 {
 291         struct ifaddrs *ifaddr, *ifa;
 292         int s;
 293         char host[NI_MAXHOST];
 294
 295         if (getifaddrs(&ifaddr) == -1) {
 296                 warn("Failed to get IP address for interface %s", iface);
 297                 return smprintf(UNKNOWN_STR);
 298         }
 299
 300         for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
 301                 if (ifa->ifa_addr == NULL) {
 302                         continue;
 303                 }
 304                 s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
 305                 if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
 306                         if (s != 0) {
 307                                 warnx("Failed to get IP address for interface %s", iface);
 308                                 return smprintf(UNKNOWN_STR);
 309                         }
 310                         return smprintf("%s", host);
 311                 }
 312         }
 313
 314         freeifaddrs(ifaddr);
 315
 316         return smprintf(UNKNOWN_STR);
 317 }
 318
 319 static char *
 320 kernel_release(void)
 321 {
 322         struct utsname udata;
 323
 324         if (uname(&udata) < 0) {
 325                 return smprintf(UNKNOWN_STR);
 326         }
 327
 328         return smprintf("%s", udata.release);
 329 }
 330
 331 static char *
 332 load_avg(void)
 333 {
 334         double avgs[3];
 335
 336         if (getloadavg(avgs, 3) < 0) {
 337                 warnx("Failed to get the load avg");
 338                 return smprintf(UNKNOWN_STR);
 339         }
 340
 341         return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
 342 }
 343
 344 static char *
 345 ram_free(void)
 346 {
 347         long free;
 348         FILE *fp;
 349
 350         fp = fopen("/proc/meminfo", "r");
 351         if (fp == NULL) {
 352                 warn("Failed to open file /proc/meminfo");
 353                 return smprintf(UNKNOWN_STR);
 354         }
 355         fscanf(fp, "MemFree: %ld kB\n", &free);
 356         fclose(fp);
 357
 358         return smprintf("%f", (float)free / 1024 / 1024);
 359 }
 360
 361 static char *
 362 ram_perc(void)
 363 {
 364         long total, free, buffers, cached;
 365         FILE *fp;
 366
 367         fp = fopen("/proc/meminfo", "r");
 368         if (fp == NULL) {
 369                 warn("Failed to open file /proc/meminfo");
 370                 return smprintf(UNKNOWN_STR);
 371         }
 372         fscanf(fp, "MemTotal: %ld kB\n", &total);
 373         fscanf(fp, "MemFree: %ld kB\n", &free);
 374         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 375         fscanf(fp, "Cached: %ld kB\n", &cached);
 376         fclose(fp);
 377
 378         return smprintf("%d%%", 100 * ((total - free) - (buffers + cached)) / total);
 379 }
 380
 381 static char *
 382 ram_total(void)
 383 {
 384         long total;
 385         FILE *fp;
 386
 387         fp = fopen("/proc/meminfo", "r");
 388         if (fp == NULL) {
 389                 warn("Failed to open file /proc/meminfo");
 390                 return smprintf(UNKNOWN_STR);
 391         }
 392         fscanf(fp, "MemTotal: %ld kB\n", &total);
 393         fclose(fp);
 394
 395         return smprintf("%f", (float)total / 1024 / 1024);
 396 }
 397
 398 static char *
 399 ram_used(void)
 400 {
 401         long free, total, buffers, cached;
 402         FILE *fp;
 403
 404         fp = fopen("/proc/meminfo", "r");
 405         if (fp == NULL) {
 406                 warn("Failed to open file /proc/meminfo");
 407                 return smprintf(UNKNOWN_STR);
 408         }
 409         fscanf(fp, "MemTotal: %ld kB\n", &total);
 410         fscanf(fp, "MemFree: %ld kB\n", &free);
 411         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 412         fscanf(fp, "Cached: %ld kB\n", &cached);
 413         fclose(fp);
 414
 415         return smprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024);
 416 }
 417
 418 static char *
 419 run_command(const char *cmd)
 420 {
 421         FILE *fp;
 422         char buf[1024] = "n/a";
 423
 424         fp = popen(cmd, "r");
 425         if (fp == NULL) {
 426                 warn("Failed to get command output for %s", cmd);
 427                 return smprintf(UNKNOWN_STR);
 428         }
 429         fgets(buf, sizeof(buf)-1, fp);
 430         pclose(fp);
 431
 432         buf[strlen(buf)] = '\0';
 433         strtok(buf, "\n");
 434
 435         return smprintf("%s", buf);
 436 }
 437
 438 static char *
 439 swap_free(void)
 440 {
 441         long total, free;
 442         FILE *fp;
 443         char buf[2048];
 444         size_t bytes_read;
 445         char *match;
 446
 447         fp = fopen("/proc/meminfo", "r");
 448         if (fp == NULL) {
 449                 warn("Failed to open file /proc/meminfo");
 450                 return smprintf(UNKNOWN_STR);
 451         }
 452         bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
 453         buf[bytes_read] = '\0';
 454         fclose(fp);
 455         if (bytes_read == 0 || bytes_read == sizeof(buf)) {
 456                 warn("Failed to read /proc/meminfo\n");
 457                 return smprintf(UNKNOWN_STR);
 458         }
 459
 460         match = strstr(buf, "SwapTotal");
 461         sscanf(match, "SwapTotal: %ld kB\n", &total);
 462         if (total == 0) {
 463                 return smprintf(UNKNOWN_STR);
 464         }
 465
 466         match = strstr(buf, "SwapFree");
 467         sscanf(match, "SwapFree: %ld kB\n", &free);
 468
 469         return smprintf("%f", (float)free / 1024 / 1024);
 470 }
 471
 472 static char *
 473 swap_perc(void)
 474 {
 475         long total, free, cached;
 476         FILE *fp;
 477         char buf[2048];
 478         size_t bytes_read;
 479         char *match;
 480
 481         fp = fopen("/proc/meminfo", "r");
 482         if (fp == NULL) {
 483                 warn("Failed to open file /proc/meminfo");
 484                 return smprintf(UNKNOWN_STR);
 485         }
 486         bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
 487         buf[bytes_read] = '\0';
 488         fclose(fp);
 489         if (bytes_read == 0 || bytes_read == sizeof(buf)) {
 490                 warn("Failed to read /proc/meminfo\n");
 491                 return smprintf(UNKNOWN_STR);
 492         }
 493
 494         match = strstr(buf, "SwapTotal");
 495         sscanf(match, "SwapTotal: %ld kB\n", &total);
 496         if (total == 0) {
 497                 return smprintf(UNKNOWN_STR);
 498         }
 499
 500         match = strstr(buf, "SwapCached");
 501         sscanf(match, "SwapCached: %ld kB\n", &cached);
 502
 503         match = strstr(buf, "SwapFree");
 504         sscanf(match, "SwapFree: %ld kB\n", &free);
 505
 506         return smprintf("%d%%", 100 * (total - free - cached) / total);
 507 }
 508
 509 static char *
 510 swap_total(void)
 511 {
 512         long total;
 513         FILE *fp;
 514         char buf[2048];
 515         size_t bytes_read;
 516         char *match;
 517
 518         fp = fopen("/proc/meminfo", "r");
 519         if (fp == NULL) {
 520                 warn("Failed to open file /proc/meminfo");
 521                 return smprintf(UNKNOWN_STR);
 522         }
 523         bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
 524         buf[bytes_read] = '\0';
 525         fclose(fp);
 526         if (bytes_read == 0 || bytes_read == sizeof(buf)) {
 527                 warn("Failed to read /proc/meminfo\n");
 528                 return smprintf(UNKNOWN_STR);
 529         }
 530
 531         match = strstr(buf, "SwapTotal");
 532         sscanf(match, "SwapTotal: %ld kB\n", &total);
 533         if (total == 0) {
 534                 return smprintf(UNKNOWN_STR);
 535         }
 536
 537         return smprintf("%f", (float)total / 1024 / 1024);
 538 }
 539
 540 static char *
 541 swap_used(void)
 542 {
 543         long total, free, cached;
 544         FILE *fp;
 545         char buf[2048];
 546         size_t bytes_read;
 547         char *match;
 548
 549         fp = fopen("/proc/meminfo", "r");
 550         if (fp == NULL) {
 551                 warn("Failed to open file /proc/meminfo");
 552                 return smprintf(UNKNOWN_STR);
 553         }
 554         bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
 555         buf[bytes_read] = '\0';
 556         fclose(fp);
 557         if (bytes_read == 0 || bytes_read == sizeof(buf)) {
 558                 warn("Failed to read /proc/meminfo\n");
 559                 return smprintf(UNKNOWN_STR);
 560         }
 561
 562         match = strstr(buf, "SwapTotal");
 563         sscanf(match, "SwapTotal: %ld kB\n", &total);
 564         if (total == 0) {
 565                 return smprintf(UNKNOWN_STR);
 566         }
 567
 568         match = strstr(buf, "SwapCached");
 569         sscanf(match, "SwapCached: %ld kB\n", &cached);
 570
 571         match = strstr(buf, "SwapFree");
 572         sscanf(match, "SwapFree: %ld kB\n", &free);
 573
 574         return smprintf("%f", (float)(total - free - cached) / 1024 / 1024);
 575 }
 576
 577 static char *
 578 temp(const char *file)
 579 {
 580         int temp;
 581         FILE *fp;
 582
 583         fp = fopen(file, "r");
 584         if (fp == NULL) {
 585                 warn("Failed to open file %s", file);
 586                 return smprintf(UNKNOWN_STR);
 587         }
 588         fscanf(fp, "%d", &temp);
 589         fclose(fp);
 590
 591         return smprintf("%d°C", temp / 1000);
 592 }
 593
 594 static char *
 595 uptime(void)
 596 {
 597         struct sysinfo info;
 598         int h = 0;
 599         int m = 0;
 600
 601         sysinfo(&info);
 602         h = info.uptime / 3600;
 603         m = (info.uptime - h * 3600 ) / 60;
 604
 605         return smprintf("%dh %dm", h, m);
 606 }
 607
 608 static char *
 609 username(void)
 610 {
 611         uid_t uid = geteuid();
 612         struct passwd *pw = getpwuid(uid);
 613
 614         if (pw == NULL) {
 615                 warn("Failed to get username");
 616                 return smprintf(UNKNOWN_STR);
 617         }
 618
 619         return smprintf("%s", pw->pw_name);
 620 }
 621
 622 static char *
 623 uid(void)
 624 {
 625         return smprintf("%d", geteuid());
 626 }
 627
 628
 629 static char *
 630 vol_perc(const char *card)
 631 {
 632         int mute;
 633         long int vol, max, min;
 634         snd_mixer_t *handle;
 635         snd_mixer_elem_t *elem;
 636         snd_mixer_selem_id_t *s_elem;
 637
 638         snd_mixer_open(&handle, 0);
 639         snd_mixer_attach(handle, card);
 640         snd_mixer_selem_register(handle, NULL, NULL);
 641         snd_mixer_load(handle);
 642         snd_mixer_selem_id_malloc(&s_elem);
 643         snd_mixer_selem_id_set_name(s_elem, "Master");
 644         elem = snd_mixer_find_selem(handle, s_elem);
 645
 646         if (elem == NULL) {
 647                 snd_mixer_selem_id_free(s_elem);
 648                 snd_mixer_close(handle);
 649                 warn("Failed to get volume percentage for %s", card);
 650                 return smprintf(UNKNOWN_STR);
 651         }
 652
 653         snd_mixer_handle_events(handle);
 654         snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
 655         snd_mixer_selem_get_playback_volume(elem, 0, &vol);
 656         snd_mixer_selem_get_playback_switch(elem, 0, &mute);
 657
 658         snd_mixer_selem_id_free(s_elem);
 659         snd_mixer_close(handle);
 660
 661         if (!mute)
 662                 return smprintf("mute");
 663         else if (max == 0)
 664                 return smprintf("0%%");
 665         else
 666                 return smprintf("%lu%%", ((uint_fast16_t)(vol * 100) / max));
 667 }
 668
 669 static char *
 670 wifi_perc(const char *iface)
 671 {
 672         int perc;
 673         char buf[255];
 674         char *datastart;
 675         char status[5];
 676         FILE *fp;
 677
 678         ccat(3, "/sys/class/net/", iface, "/operstate");
 679         fp = fopen(concat, "r");
 680         if (fp == NULL) {
 681                 warn("Failed to open file %s", concat);
 682                 return smprintf(UNKNOWN_STR);
 683         }
 684         fgets(status, 5, fp);
 685         fclose(fp);
 686         if(strcmp(status, "up\n") != 0) {
 687                 return smprintf(UNKNOWN_STR);
 688         }
 689
 690         fp = fopen("/proc/net/wireless", "r");
 691         if (fp == NULL) {
 692                 warn("Failed to open file /proc/net/wireless");
 693                 return smprintf(UNKNOWN_STR);
 694         }
 695         ccat(2, iface, ":");
 696         fgets(buf, sizeof(buf), fp);
 697         fgets(buf, sizeof(buf), fp);
 698         fgets(buf, sizeof(buf), fp);
 699         fclose(fp);
 700
 701         datastart = strstr(buf, concat);
 702         if (datastart != NULL) {
 703                 datastart = strstr(buf, ":");
 704                 sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &perc);
 705         }
 706
 707         return smprintf("%d%%", perc);
 708 }
 709
 710 static char *
 711 wifi_essid(const char *iface)
 712 {
 713         char id[IW_ESSID_MAX_SIZE+1];
 714         int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
 715         struct iwreq wreq;
 716
 717         memset(&wreq, 0, sizeof(struct iwreq));
 718         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 719         sprintf(wreq.ifr_name, iface);
 720         if (sockfd == -1) {
 721                 warn("Failed to get ESSID for interface %s", iface);
 722                 return smprintf(UNKNOWN_STR);
 723         }
 724         wreq.u.essid.pointer = id;
 725         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 726                 warn("Failed to get ESSID for interface %s", iface);
 727                 return smprintf(UNKNOWN_STR);
 728         }
 729
 730         close(sockfd);
 731
 732         if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
 733                 return smprintf(UNKNOWN_STR);
 734         else
 735                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 736 }
 737
 738 static void
 739 set_status(const char *str)
 740 {
 741         XStoreName(dpy, DefaultRootWindow(dpy), str);
 742         XSync(dpy, False);
 743 }
 744
 745 static void
 746 sighandler(const int signo)
 747 {
 748         if (signo == SIGTERM || signo == SIGINT) {
 749                 done = 1;
 750         }
 751 }
 752
 753 static void
 754 usage(void)
 755 {
 756         fprintf(stderr, "usage: %s [-dhov]\n", argv0);
 757         exit(1);
 758 }
 759
 760 int
 761 main(int argc, char *argv[])
 762 {
 763         unsigned short int i;
 764         char status_string[4096];
 765         char *res, *element;
 766         struct arg argument;
 767         struct sigaction act;
 768
 769         ARGBEGIN {
 770                 case 'd':
 771                         dflag = 1;
 772                         break;
 773                 case 'o':
 774                         oflag = 1;
 775                         break;
 776                 case 'v':
 777                         printf("slstatus %s (C) 2016 slstatus engineers\n", VERSION);
 778                         return 0;
 779                 default:
 780                         usage();
 781         } ARGEND
 782
 783         if (dflag && oflag) {
 784                 usage();
 785         }
 786         if (dflag && daemon(1, 1) < 0) {
 787                 err(1, "daemon");
 788         }
 789
 790         memset(&act, 0, sizeof(act));
 791         act.sa_handler = sighandler;
 792         sigaction(SIGINT,  &act, 0);
 793         sigaction(SIGTERM, &act, 0);
 794
 795         if (!oflag) {
 796                 dpy = XOpenDisplay(NULL);
 797         }
 798
 799         setlocale(LC_ALL, "");
 800
 801         while (!done) {
 802                 status_string[0] = '\0';
 803
 804                 for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 805                         argument = args[i];
 806                         if (argument.args == NULL) {
 807                                 res = argument.func();
 808                         } else {
 809                                 res = argument.func(argument.args);
 810                         }
 811                         element = smprintf(argument.fmt, res);
 812                         if (element == NULL) {
 813                                 element = smprintf(UNKNOWN_STR);
 814                                 warnx("Failed to format output");
 815                         }
 816                         strlcat(status_string, element, sizeof(status_string));
 817                         free(res);
 818                         free(element);
 819                 }
 820
 821                 if (!oflag) {
 822                         set_status(status_string);
 823                 } else {
 824                         printf("%s\n", status_string);
 825                 }
 826
 827                 /*
 828                  * subtract delay time spend in function
 829                  * calls from the actual global delay time
 830                  */
 831                 sleep(UPDATE_INTERVAL - delay);
 832                 delay = 0;
 833         }
 834
 835         if (!oflag) {
 836                 set_status(NULL);
 837                 XCloseDisplay(dpy);
 838         }
 839
 840         return 0;
 841 }