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 *load_avg(void);
  56 static char *ram_free(void);
  57 static char *ram_perc(void);
  58 static char *ram_used(void);
  59 static char *ram_total(void);
  60 static char *run_command(const char *cmd);
  61 static char *swap_free(void);
  62 static char *swap_perc(void);
  63 static char *swap_used(void);
  64 static char *swap_total(void);
  65 static char *temp(const char *file);
  66 static char *uid(void);
  67 static char *uptime(void);
  68 static char *username(void);
  69 static char *vol_perc(const char *card);
  70 static char *wifi_perc(const char *iface);
  71 static char *wifi_essid(const char *iface);
  72 static char *kernel_release(void);
  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 load_avg(void)
 321 {
 322         double avgs[3];
 323
 324         if (getloadavg(avgs, 3) < 0) {
 325                 warnx("Failed to get the load avg");
 326                 return smprintf(UNKNOWN_STR);
 327         }
 328
 329         return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
 330 }
 331
 332 static char *
 333 ram_free(void)
 334 {
 335         long free;
 336         FILE *fp;
 337
 338         fp = fopen("/proc/meminfo", "r");
 339         if (fp == NULL) {
 340                 warn("Failed to open file /proc/meminfo");
 341                 return smprintf(UNKNOWN_STR);
 342         }
 343         fscanf(fp, "MemFree: %ld kB\n", &free);
 344         fclose(fp);
 345
 346         return smprintf("%f", (float)free / 1024 / 1024);
 347 }
 348
 349 static char *
 350 ram_perc(void)
 351 {
 352         long total, free, buffers, cached;
 353         FILE *fp;
 354
 355         fp = fopen("/proc/meminfo", "r");
 356         if (fp == NULL) {
 357                 warn("Failed to open file /proc/meminfo");
 358                 return smprintf(UNKNOWN_STR);
 359         }
 360         fscanf(fp, "MemTotal: %ld kB\n", &total);
 361         fscanf(fp, "MemFree: %ld kB\n", &free);
 362         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 363         fscanf(fp, "Cached: %ld kB\n", &cached);
 364         fclose(fp);
 365
 366         return smprintf("%d%%", 100 * ((total - free) - (buffers + cached)) / total);
 367 }
 368
 369 static char *
 370 ram_total(void)
 371 {
 372         long total;
 373         FILE *fp;
 374
 375         fp = fopen("/proc/meminfo", "r");
 376         if (fp == NULL) {
 377                 warn("Failed to open file /proc/meminfo");
 378                 return smprintf(UNKNOWN_STR);
 379         }
 380         fscanf(fp, "MemTotal: %ld kB\n", &total);
 381         fclose(fp);
 382
 383         return smprintf("%f", (float)total / 1024 / 1024);
 384 }
 385
 386 static char *
 387 ram_used(void)
 388 {
 389         long free, total, buffers, cached;
 390         FILE *fp;
 391
 392         fp = fopen("/proc/meminfo", "r");
 393         if (fp == NULL) {
 394                 warn("Failed to open file /proc/meminfo");
 395                 return smprintf(UNKNOWN_STR);
 396         }
 397         fscanf(fp, "MemTotal: %ld kB\n", &total);
 398         fscanf(fp, "MemFree: %ld kB\n", &free);
 399         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 400         fscanf(fp, "Cached: %ld kB\n", &cached);
 401         fclose(fp);
 402
 403         return smprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024);
 404 }
 405
 406 static char *
 407 run_command(const char *cmd)
 408 {
 409         FILE *fp;
 410         char buf[1024] = "n/a";
 411
 412         fp = popen(cmd, "r");
 413         if (fp == NULL) {
 414                 warn("Failed to get command output for %s", cmd);
 415                 return smprintf(UNKNOWN_STR);
 416         }
 417         fgets(buf, sizeof(buf)-1, fp);
 418         pclose(fp);
 419
 420         buf[strlen(buf)] = '\0';
 421         strtok(buf, "\n");
 422
 423         return smprintf("%s", buf);
 424 }
 425
 426 static char *
 427 swap_free(void)
 428 {
 429         long total, free;
 430         FILE *fp;
 431         char buf[2048];
 432         size_t bytes_read;
 433         char *match;
 434
 435         fp = fopen("/proc/meminfo", "r");
 436         if (fp == NULL) {
 437                 warn("Failed to open file /proc/meminfo");
 438                 return smprintf(UNKNOWN_STR);
 439         }
 440         bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
 441         buf[bytes_read] = '\0';
 442         fclose(fp);
 443         if (bytes_read == 0 || bytes_read == sizeof(buf)) {
 444                 warn("Failed to read /proc/meminfo\n");
 445                 return smprintf(UNKNOWN_STR);
 446         }
 447
 448         match = strstr(buf, "SwapTotal");
 449         sscanf(match, "SwapTotal: %ld kB\n", &total);
 450         if (total == 0) {
 451                 return smprintf(UNKNOWN_STR);
 452         }
 453
 454         match = strstr(buf, "SwapFree");
 455         sscanf(match, "SwapFree: %ld kB\n", &free);
 456
 457         return smprintf("%f", (float)free / 1024 / 1024);
 458 }
 459
 460 static char *
 461 swap_perc(void)
 462 {
 463         long total, free, cached;
 464         FILE *fp;
 465         char buf[2048];
 466         size_t bytes_read;
 467         char *match;
 468
 469         fp = fopen("/proc/meminfo", "r");
 470         if (fp == NULL) {
 471                 warn("Failed to open file /proc/meminfo");
 472                 return smprintf(UNKNOWN_STR);
 473         }
 474         bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
 475         buf[bytes_read] = '\0';
 476         fclose(fp);
 477         if (bytes_read == 0 || bytes_read == sizeof(buf)) {
 478                 warn("Failed to read /proc/meminfo\n");
 479                 return smprintf(UNKNOWN_STR);
 480         }
 481
 482         match = strstr(buf, "SwapTotal");
 483         sscanf(match, "SwapTotal: %ld kB\n", &total);
 484         if (total == 0) {
 485                 return smprintf(UNKNOWN_STR);
 486         }
 487
 488         match = strstr(buf, "SwapCached");
 489         sscanf(match, "SwapCached: %ld kB\n", &cached);
 490
 491         match = strstr(buf, "SwapFree");
 492         sscanf(match, "SwapFree: %ld kB\n", &free);
 493
 494         return smprintf("%d%%", 100 * (total - free - cached) / total);
 495 }
 496
 497 static char *
 498 swap_total(void)
 499 {
 500         long total;
 501         FILE *fp;
 502         char buf[2048];
 503         size_t bytes_read;
 504         char *match;
 505
 506         fp = fopen("/proc/meminfo", "r");
 507         if (fp == NULL) {
 508                 warn("Failed to open file /proc/meminfo");
 509                 return smprintf(UNKNOWN_STR);
 510         }
 511         bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
 512         buf[bytes_read] = '\0';
 513         fclose(fp);
 514         if (bytes_read == 0 || bytes_read == sizeof(buf)) {
 515                 warn("Failed to read /proc/meminfo\n");
 516                 return smprintf(UNKNOWN_STR);
 517         }
 518
 519         match = strstr(buf, "SwapTotal");
 520         sscanf(match, "SwapTotal: %ld kB\n", &total);
 521         if (total == 0) {
 522                 return smprintf(UNKNOWN_STR);
 523         }
 524
 525         return smprintf("%f", (float)total / 1024 / 1024);
 526 }
 527
 528 static char *
 529 swap_used(void)
 530 {
 531         long total, free, cached;
 532         FILE *fp;
 533         char buf[2048];
 534         size_t bytes_read;
 535         char *match;
 536
 537         fp = fopen("/proc/meminfo", "r");
 538         if (fp == NULL) {
 539                 warn("Failed to open file /proc/meminfo");
 540                 return smprintf(UNKNOWN_STR);
 541         }
 542         bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
 543         buf[bytes_read] = '\0';
 544         fclose(fp);
 545         if (bytes_read == 0 || bytes_read == sizeof(buf)) {
 546                 warn("Failed to read /proc/meminfo\n");
 547                 return smprintf(UNKNOWN_STR);
 548         }
 549
 550         match = strstr(buf, "SwapTotal");
 551         sscanf(match, "SwapTotal: %ld kB\n", &total);
 552         if (total == 0) {
 553                 return smprintf(UNKNOWN_STR);
 554         }
 555
 556         match = strstr(buf, "SwapCached");
 557         sscanf(match, "SwapCached: %ld kB\n", &cached);
 558
 559         match = strstr(buf, "SwapFree");
 560         sscanf(match, "SwapFree: %ld kB\n", &free);
 561
 562         return smprintf("%f", (float)(total - free - cached) / 1024 / 1024);
 563 }
 564
 565 static char *
 566 temp(const char *file)
 567 {
 568         int temp;
 569         FILE *fp;
 570
 571         fp = fopen(file, "r");
 572         if (fp == NULL) {
 573                 warn("Failed to open file %s", file);
 574                 return smprintf(UNKNOWN_STR);
 575         }
 576         fscanf(fp, "%d", &temp);
 577         fclose(fp);
 578
 579         return smprintf("%d°C", temp / 1000);
 580 }
 581
 582 static char *
 583 uptime(void)
 584 {
 585         struct sysinfo info;
 586         int h = 0;
 587         int m = 0;
 588
 589         sysinfo(&info);
 590         h = info.uptime / 3600;
 591         m = (info.uptime - h * 3600 ) / 60;
 592
 593         return smprintf("%dh %dm", h, m);
 594 }
 595
 596 static char *
 597 username(void)
 598 {
 599         uid_t uid = geteuid();
 600         struct passwd *pw = getpwuid(uid);
 601
 602         if (pw == NULL) {
 603                 warn("Failed to get username");
 604                 return smprintf(UNKNOWN_STR);
 605         }
 606
 607         return smprintf("%s", pw->pw_name);
 608 }
 609
 610 static char *
 611 uid(void)
 612 {
 613         return smprintf("%d", geteuid());
 614 }
 615
 616
 617 static char *
 618 vol_perc(const char *card)
 619 {
 620         int mute;
 621         long int vol, max, min;
 622         snd_mixer_t *handle;
 623         snd_mixer_elem_t *elem;
 624         snd_mixer_selem_id_t *s_elem;
 625
 626         snd_mixer_open(&handle, 0);
 627         snd_mixer_attach(handle, card);
 628         snd_mixer_selem_register(handle, NULL, NULL);
 629         snd_mixer_load(handle);
 630         snd_mixer_selem_id_malloc(&s_elem);
 631         snd_mixer_selem_id_set_name(s_elem, "Master");
 632         elem = snd_mixer_find_selem(handle, s_elem);
 633
 634         if (elem == NULL) {
 635                 snd_mixer_selem_id_free(s_elem);
 636                 snd_mixer_close(handle);
 637                 warn("Failed to get volume percentage for %s", card);
 638                 return smprintf(UNKNOWN_STR);
 639         }
 640
 641         snd_mixer_handle_events(handle);
 642         snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
 643         snd_mixer_selem_get_playback_volume(elem, 0, &vol);
 644         snd_mixer_selem_get_playback_switch(elem, 0, &mute);
 645
 646         snd_mixer_selem_id_free(s_elem);
 647         snd_mixer_close(handle);
 648
 649         if (!mute)
 650                 return smprintf("mute");
 651         else if (max == 0)
 652                 return smprintf("0%%");
 653         else
 654                 return smprintf("%lu%%", ((uint_fast16_t)(vol * 100) / max));
 655 }
 656
 657 static char *
 658 wifi_perc(const char *iface)
 659 {
 660         int perc;
 661         char buf[255];
 662         char *datastart;
 663         char status[5];
 664         FILE *fp;
 665
 666         ccat(3, "/sys/class/net/", iface, "/operstate");
 667         fp = fopen(concat, "r");
 668         if (fp == NULL) {
 669                 warn("Failed to open file %s", concat);
 670                 return smprintf(UNKNOWN_STR);
 671         }
 672         fgets(status, 5, fp);
 673         fclose(fp);
 674         if(strcmp(status, "up\n") != 0) {
 675                 return smprintf(UNKNOWN_STR);
 676         }
 677
 678         fp = fopen("/proc/net/wireless", "r");
 679         if (fp == NULL) {
 680                 warn("Failed to open file /proc/net/wireless");
 681                 return smprintf(UNKNOWN_STR);
 682         }
 683         ccat(2, iface, ":");
 684         fgets(buf, sizeof(buf), fp);
 685         fgets(buf, sizeof(buf), fp);
 686         fgets(buf, sizeof(buf), fp);
 687         fclose(fp);
 688
 689         datastart = strstr(buf, concat);
 690         if (datastart != NULL) {
 691                 datastart = strstr(buf, ":");
 692                 sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &perc);
 693         }
 694
 695         return smprintf("%d%%", perc);
 696 }
 697
 698 static char *
 699 wifi_essid(const char *iface)
 700 {
 701         char id[IW_ESSID_MAX_SIZE+1];
 702         int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
 703         struct iwreq wreq;
 704
 705         memset(&wreq, 0, sizeof(struct iwreq));
 706         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 707         sprintf(wreq.ifr_name, iface);
 708         if (sockfd == -1) {
 709                 warn("Failed to get ESSID for interface %s", iface);
 710                 return smprintf(UNKNOWN_STR);
 711         }
 712         wreq.u.essid.pointer = id;
 713         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 714                 warn("Failed to get ESSID for interface %s", iface);
 715                 return smprintf(UNKNOWN_STR);
 716         }
 717
 718         close(sockfd);
 719
 720         if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
 721                 return smprintf(UNKNOWN_STR);
 722         else
 723                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 724 }
 725
 726 static char *
 727 kernel_release(void)
 728 {
 729         struct utsname udata;
 730         if (uname(&udata) < 0)
 731                 return smprintf(UNKNOWN_STR);
 732
 733         return smprintf("%s", udata.release);
 734 }
 735
 736 static void
 737 set_status(const char *str)
 738 {
 739         XStoreName(dpy, DefaultRootWindow(dpy), str);
 740         XSync(dpy, False);
 741 }
 742
 743 static void
 744 sighandler(const int signo)
 745 {
 746         if (signo == SIGTERM || signo == SIGINT) {
 747                 done = 1;
 748         }
 749 }
 750
 751 static void
 752 usage(void)
 753 {
 754         fprintf(stderr, "usage: %s [-dhov]\n", argv0);
 755         exit(1);
 756 }
 757
 758 int
 759 main(int argc, char *argv[])
 760 {
 761         unsigned short int i;
 762         char status_string[2048];
 763         char *res, *element;
 764         struct arg argument;
 765         struct sigaction act;
 766
 767         ARGBEGIN {
 768                 case 'd':
 769                         dflag = 1;
 770                         break;
 771                 case 'o':
 772                         oflag = 1;
 773                         break;
 774                 case 'v':
 775                         printf("slstatus %s (C) 2016 slstatus engineers\n", VERSION);
 776                         return 0;
 777                 default:
 778                         usage();
 779         } ARGEND
 780
 781         if (dflag && oflag) {
 782                 usage();
 783         }
 784         if (dflag && daemon(1, 1) < 0) {
 785                 err(1, "daemon");
 786         }
 787
 788         memset(&act, 0, sizeof(act));
 789         act.sa_handler = sighandler;
 790         sigaction(SIGINT,  &act, 0);
 791         sigaction(SIGTERM, &act, 0);
 792
 793         if (!oflag) {
 794                 dpy = XOpenDisplay(NULL);
 795         }
 796
 797         setlocale(LC_ALL, "");
 798
 799         while (!done) {
 800                 status_string[0] = '\0';
 801
 802                 for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 803                         argument = args[i];
 804                         if (argument.args == NULL) {
 805                                 res = argument.func();
 806                         } else {
 807                                 res = argument.func(argument.args);
 808                         }
 809                         element = smprintf(argument.fmt, res);
 810                         if (element == NULL) {
 811                                 element = smprintf(UNKNOWN_STR);
 812                                 warnx("Failed to format output");
 813                         }
 814                         if (strlcat(status_string, element, sizeof(status_string)) >= sizeof(status_string))
 815                                 warnx("Output too long");
 816                         free(res);
 817                         free(element);
 818                 }
 819
 820                 if (!oflag) {
 821                         set_status(status_string);
 822                 } else {
 823                         printf("%s\n", status_string);
 824                 }
 825
 826                 /*
 827                  * subtract delay time spend in function
 828                  * calls from the actual global delay time
 829                  */
 830                 sleep(UPDATE_INTERVAL - delay);
 831                 delay = 0;
 832         }
 833
 834         if (!oflag) {
 835                 set_status(NULL);
 836                 XCloseDisplay(dpy);
 837         }
 838
 839         return 0;
 840 }