slstatus.c

   1 /* See LICENSE file for copyright and license details. */
   2
   3 #include <err.h>
   4 #include <fcntl.h>
   5 #include <ifaddrs.h>
   6 #include <limits.h>
   7 #include <linux/wireless.h>
   8 #include <locale.h>
   9 #include <netdb.h>
  10 #include <pwd.h>
  11 #include <signal.h>
  12 #include <stdarg.h>
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #include <sys/ioctl.h>
  17 #include <sys/stat.h>
  18 #include <sys/statvfs.h>
  19 #include <sys/socket.h>
  20 #include <sys/soundcard.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         unsigned int i;
 621         int v, afd, devmask;
 622         char *vnames[] = SOUND_DEVICE_NAMES;
 623
 624         afd = open(card, O_RDONLY);
 625         if (afd < 0) {
 626                 warn("Cannot open %s", card);
 627                 return smprintf(UNKNOWN_STR);
 628         }
 629
 630         ioctl(afd, MIXER_READ(SOUND_MIXER_DEVMASK), &devmask);
 631         for (i = 0; i < (sizeof(vnames) / sizeof((vnames[0]))); i++)
 632                 if (devmask & (1 << i))
 633                         if (!strcmp("vol", vnames[i]))
 634                                 ioctl(afd, MIXER_READ(i), &v);
 635
 636         close(afd);
 637         if (v == 0)
 638                 return smprintf("mute");
 639         return smprintf("%d%%", v & 0xff);
 640 }
 641
 642 static char *
 643 wifi_perc(const char *iface)
 644 {
 645         int perc;
 646         char buf[255];
 647         char *datastart;
 648         char status[5];
 649         FILE *fp;
 650
 651         ccat(3, "/sys/class/net/", iface, "/operstate");
 652         fp = fopen(concat, "r");
 653         if (fp == NULL) {
 654                 warn("Failed to open file %s", concat);
 655                 return smprintf(UNKNOWN_STR);
 656         }
 657         fgets(status, 5, fp);
 658         fclose(fp);
 659         if(strcmp(status, "up\n") != 0) {
 660                 return smprintf(UNKNOWN_STR);
 661         }
 662
 663         fp = fopen("/proc/net/wireless", "r");
 664         if (fp == NULL) {
 665                 warn("Failed to open file /proc/net/wireless");
 666                 return smprintf(UNKNOWN_STR);
 667         }
 668         ccat(2, iface, ":");
 669         fgets(buf, sizeof(buf), fp);
 670         fgets(buf, sizeof(buf), fp);
 671         fgets(buf, sizeof(buf), fp);
 672         fclose(fp);
 673
 674         datastart = strstr(buf, concat);
 675         if (datastart != NULL) {
 676                 datastart = strstr(buf, ":");
 677                 sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &perc);
 678         }
 679
 680         return smprintf("%d%%", perc);
 681 }
 682
 683 static char *
 684 wifi_essid(const char *iface)
 685 {
 686         char id[IW_ESSID_MAX_SIZE+1];
 687         int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
 688         struct iwreq wreq;
 689
 690         memset(&wreq, 0, sizeof(struct iwreq));
 691         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 692         sprintf(wreq.ifr_name, iface);
 693         if (sockfd == -1) {
 694                 warn("Failed to get ESSID for interface %s", iface);
 695                 return smprintf(UNKNOWN_STR);
 696         }
 697         wreq.u.essid.pointer = id;
 698         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 699                 warn("Failed to get ESSID for interface %s", iface);
 700                 return smprintf(UNKNOWN_STR);
 701         }
 702
 703         close(sockfd);
 704
 705         if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
 706                 return smprintf(UNKNOWN_STR);
 707         else
 708                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 709 }
 710
 711 static char *
 712 kernel_release(void)
 713 {
 714         struct utsname udata;
 715         if (uname(&udata) < 0)
 716                 return smprintf(UNKNOWN_STR);
 717
 718         return smprintf("%s", udata.release);
 719 }
 720
 721 static void
 722 set_status(const char *str)
 723 {
 724         XStoreName(dpy, DefaultRootWindow(dpy), str);
 725         XSync(dpy, False);
 726 }
 727
 728 static void
 729 sighandler(const int signo)
 730 {
 731         if (signo == SIGTERM || signo == SIGINT) {
 732                 done = 1;
 733         }
 734 }
 735
 736 static void
 737 usage(void)
 738 {
 739         fprintf(stderr, "usage: %s [-dhov]\n", argv0);
 740         exit(1);
 741 }
 742
 743 int
 744 main(int argc, char *argv[])
 745 {
 746         unsigned short int i;
 747         char status_string[4096];
 748         char *res, *element;
 749         struct arg argument;
 750         struct sigaction act;
 751
 752         ARGBEGIN {
 753                 case 'd':
 754                         dflag = 1;
 755                         break;
 756                 case 'o':
 757                         oflag = 1;
 758                         break;
 759                 case 'v':
 760                         printf("slstatus %s (C) 2016 slstatus engineers\n", VERSION);
 761                         return 0;
 762                 default:
 763                         usage();
 764         } ARGEND
 765
 766         if (dflag && oflag) {
 767                 usage();
 768         }
 769         if (dflag && daemon(1, 1) < 0) {
 770                 err(1, "daemon");
 771         }
 772
 773         memset(&act, 0, sizeof(act));
 774         act.sa_handler = sighandler;
 775         sigaction(SIGINT,  &act, 0);
 776         sigaction(SIGTERM, &act, 0);
 777
 778         if (!oflag) {
 779                 dpy = XOpenDisplay(NULL);
 780         }
 781
 782         setlocale(LC_ALL, "");
 783
 784         while (!done) {
 785                 status_string[0] = '\0';
 786
 787                 for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 788                         argument = args[i];
 789                         if (argument.args == NULL) {
 790                                 res = argument.func();
 791                         } else {
 792                                 res = argument.func(argument.args);
 793                         }
 794                         element = smprintf(argument.fmt, res);
 795                         if (element == NULL) {
 796                                 element = smprintf(UNKNOWN_STR);
 797                                 warnx("Failed to format output");
 798                         }
 799                         strlcat(status_string, element, sizeof(status_string));
 800                         free(res);
 801                         free(element);
 802                 }
 803
 804                 if (!oflag) {
 805                         set_status(status_string);
 806                 } else {
 807                         printf("%s\n", status_string);
 808                 }
 809
 810                 /*
 811                  * subtract delay time spend in function
 812                  * calls from the actual global delay time
 813                  */
 814                 sleep(UPDATE_INTERVAL - delay);
 815                 delay = 0;
 816         }
 817
 818         if (!oflag) {
 819                 set_status(NULL);
 820                 XCloseDisplay(dpy);
 821         }
 822
 823         return 0;
 824 }