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 #include "arg.h"
  29
  30 struct arg {
  31         char *(*func)();
  32         const char *fmt;
  33         const char *args;
  34 };
  35
  36 static char *smprintf(const char *fmt, ...);
  37 static char *battery_perc(const char *bat);
  38 static char *battery_state(const char *bat);
  39 static char *cpu_perc(void);
  40 static char *datetime(const char *fmt);
  41 static char *disk_free(const char *mnt);
  42 static char *disk_perc(const char *mnt);
  43 static char *disk_total(const char *mnt);
  44 static char *disk_used(const char *mnt);
  45 static char *entropy(void);
  46 static char *gid(void);
  47 static char *hostname(void);
  48 static char *ip(const char *iface);
  49 static char *kernel_release(void);
  50 static char *load_avg(void);
  51 static char *ram_free(void);
  52 static char *ram_perc(void);
  53 static char *ram_used(void);
  54 static char *ram_total(void);
  55 static char *run_command(const char *cmd);
  56 static char *swap_free(void);
  57 static char *swap_perc(void);
  58 static char *swap_used(void);
  59 static char *swap_total(void);
  60 static char *temp(const char *file);
  61 static char *uid(void);
  62 static char *uptime(void);
  63 static char *username(void);
  64 static char *vol_perc(const char *card);
  65 static char *wifi_perc(const char *iface);
  66 static char *wifi_essid(const char *iface);
  67 static void sighandler(const int signo);
  68 static void usage(const int eval);
  69
  70 char *argv0;
  71 static unsigned short int delay = 0;
  72 static unsigned short int done;
  73 static unsigned short int dflag, oflag;
  74 static Display *dpy;
  75
  76 #include "config.h"
  77
  78 static char *
  79 smprintf(const char *fmt, ...)
  80 {
  81         va_list ap;
  82         char *ret;
  83         int len;
  84
  85         va_start(ap, fmt);
  86         len = vsnprintf(NULL, 0, fmt, ap);
  87         va_end(ap);
  88
  89         ret = malloc(++len);
  90         if (ret == NULL) {
  91                 err(1, "malloc");
  92         }
  93
  94         va_start(ap, fmt);
  95         vsnprintf(ret, len, fmt, ap);
  96         va_end(ap);
  97
  98         return ret;
  99 }
 100
 101 static char *
 102 battery_perc(const char *bat)
 103 {
 104         int perc;
 105         char path[PATH_MAX];
 106         FILE *fp;
 107
 108         snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/capacity");
 109         fp = fopen(path, "r");
 110         if (fp == NULL) {
 111                 warn("Failed to open file %s", path);
 112                 return smprintf("%s", UNKNOWN_STR);
 113         }
 114         fscanf(fp, "%i", &perc);
 115         fclose(fp);
 116
 117         return smprintf("%d%%", perc);
 118 }
 119
 120 static char *
 121 battery_state(const char *bat)
 122 {
 123         char path[PATH_MAX];
 124         char state[12];
 125         FILE *fp;
 126
 127         snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/status");
 128         fp = fopen(path, "r");
 129         if (fp == NULL) {
 130                 warn("Failed to open file %s", path);
 131                 return smprintf("%s", UNKNOWN_STR);
 132         }
 133         fscanf(fp, "%12s", state);
 134         fclose(fp);
 135
 136         if (strcmp(state, "Charging") == 0) {
 137                 return smprintf("+");
 138         } else if (strcmp(state, "Discharging") == 0) {
 139                 return smprintf("-");
 140         } else if (strcmp(state, "Full") == 0) {
 141                 return smprintf("=");
 142         } else {
 143                 return smprintf("?");
 144         }
 145 }
 146
 147 static char *
 148 cpu_perc(void)
 149 {
 150         int perc;
 151         long double a[4], b[4];
 152         FILE *fp;
 153
 154         fp = fopen("/proc/stat", "r");
 155         if (fp == NULL) {
 156                 warn("Failed to open file /proc/stat");
 157                 return smprintf("%s", UNKNOWN_STR);
 158         }
 159         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
 160         fclose(fp);
 161
 162         delay++;
 163         sleep(delay);
 164
 165         fp = fopen("/proc/stat", "r");
 166         if (fp == NULL) {
 167                 warn("Failed to open file /proc/stat");
 168                 return smprintf("%s", UNKNOWN_STR);
 169         }
 170         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
 171         fclose(fp);
 172
 173         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]));
 174         return smprintf("%d%%", perc);
 175 }
 176
 177 static char *
 178 datetime(const char *fmt)
 179 {
 180         time_t t;
 181         char str[80];
 182
 183         t = time(NULL);
 184         if (strftime(str, sizeof(str), fmt, localtime(&t)) == 0) {
 185                 return smprintf("%s", UNKNOWN_STR);
 186         }
 187
 188         return smprintf("%s", str);
 189 }
 190
 191 static char *
 192 disk_free(const char *mnt)
 193 {
 194         struct statvfs fs;
 195
 196         if (statvfs(mnt, &fs) < 0) {
 197                 warn("Failed to get filesystem info");
 198                 return smprintf("%s", UNKNOWN_STR);
 199         }
 200
 201         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
 202 }
 203
 204 static char *
 205 disk_perc(const char *mnt)
 206 {
 207         int perc;
 208         struct statvfs fs;
 209
 210         if (statvfs(mnt, &fs) < 0) {
 211                 warn("Failed to get filesystem info");
 212                 return smprintf("%s", UNKNOWN_STR);
 213         }
 214
 215         perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
 216
 217         return smprintf("%d%%", perc);
 218 }
 219
 220 static char *
 221 disk_total(const char *mnt)
 222 {
 223         struct statvfs fs;
 224
 225         if (statvfs(mnt, &fs) < 0) {
 226                 warn("Failed to get filesystem info");
 227                 return smprintf("%s", UNKNOWN_STR);
 228         }
 229
 230         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
 231 }
 232
 233 static char *
 234 disk_used(const char *mnt)
 235 {
 236         struct statvfs fs;
 237
 238         if (statvfs(mnt, &fs) < 0) {
 239                 warn("Failed to get filesystem info");
 240                 return smprintf("%s", UNKNOWN_STR);
 241         }
 242
 243         return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
 244 }
 245
 246 static char *
 247 entropy(void)
 248 {
 249         int num;
 250         FILE *fp;
 251
 252         fp= fopen("/proc/sys/kernel/random/entropy_avail", "r");
 253         if (fp == NULL) {
 254                 warn("Failed to open file /proc/sys/kernel/random/entropy_avail");
 255                 return smprintf("%s", UNKNOWN_STR);
 256         }
 257         fscanf(fp, "%d", &num);
 258         fclose(fp);
 259
 260         return smprintf("%d", num);
 261 }
 262
 263 static char *
 264 gid(void)
 265 {
 266         return smprintf("%d", getgid());
 267 }
 268
 269 static char *
 270 hostname(void)
 271 {
 272         char buf[HOST_NAME_MAX];
 273
 274         if (gethostname(buf, sizeof(buf)) == -1) {
 275                 warn("hostname");
 276                 return smprintf("%s", UNKNOWN_STR);
 277         }
 278
 279         return smprintf("%s", buf);
 280 }
 281
 282 static char *
 283 ip(const char *iface)
 284 {
 285         struct ifaddrs *ifaddr, *ifa;
 286         int s;
 287         char host[NI_MAXHOST];
 288
 289         if (getifaddrs(&ifaddr) == -1) {
 290                 warn("Failed to get IP address for interface %s", iface);
 291                 return smprintf("%s", UNKNOWN_STR);
 292         }
 293
 294         for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
 295                 if (ifa->ifa_addr == NULL) {
 296                         continue;
 297                 }
 298                 s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
 299                 if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
 300                         if (s != 0) {
 301                                 warnx("Failed to get IP address for interface %s", iface);
 302                                 return smprintf("%s", UNKNOWN_STR);
 303                         }
 304                         return smprintf("%s", host);
 305                 }
 306         }
 307
 308         freeifaddrs(ifaddr);
 309
 310         return smprintf("%s", UNKNOWN_STR);
 311 }
 312
 313 static char *
 314 kernel_release(void)
 315 {
 316         struct utsname udata;
 317
 318         if (uname(&udata) < 0) {
 319                 return smprintf(UNKNOWN_STR);
 320         }
 321
 322         return smprintf("%s", udata.release);
 323 }
 324
 325 static char *
 326 load_avg(void)
 327 {
 328         double avgs[3];
 329
 330         if (getloadavg(avgs, 3) < 0) {
 331                 warnx("Failed to get the load avg");
 332                 return smprintf("%s", UNKNOWN_STR);
 333         }
 334
 335         return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
 336 }
 337
 338 static char *
 339 ram_free(void)
 340 {
 341         long free;
 342         FILE *fp;
 343
 344         fp = fopen("/proc/meminfo", "r");
 345         if (fp == NULL) {
 346                 warn("Failed to open file /proc/meminfo");
 347                 return smprintf("%s", UNKNOWN_STR);
 348         }
 349         fscanf(fp, "MemFree: %ld kB\n", &free);
 350         fclose(fp);
 351
 352         return smprintf("%f", (float)free / 1024 / 1024);
 353 }
 354
 355 static char *
 356 ram_perc(void)
 357 {
 358         long total, free, buffers, cached;
 359         FILE *fp;
 360
 361         fp = fopen("/proc/meminfo", "r");
 362         if (fp == NULL) {
 363                 warn("Failed to open file /proc/meminfo");
 364                 return smprintf("%s", UNKNOWN_STR);
 365         }
 366         fscanf(fp, "MemTotal: %ld kB\n", &total);
 367         fscanf(fp, "MemFree: %ld kB\n", &free);
 368         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 369         fscanf(fp, "Cached: %ld kB\n", &cached);
 370         fclose(fp);
 371
 372         return smprintf("%d%%", 100 * ((total - free) - (buffers + cached)) / total);
 373 }
 374
 375 static char *
 376 ram_total(void)
 377 {
 378         long total;
 379         FILE *fp;
 380
 381         fp = fopen("/proc/meminfo", "r");
 382         if (fp == NULL) {
 383                 warn("Failed to open file /proc/meminfo");
 384                 return smprintf("%s", UNKNOWN_STR);
 385         }
 386         fscanf(fp, "MemTotal: %ld kB\n", &total);
 387         fclose(fp);
 388
 389         return smprintf("%f", (float)total / 1024 / 1024);
 390 }
 391
 392 static char *
 393 ram_used(void)
 394 {
 395         long free, total, buffers, cached;
 396         FILE *fp;
 397
 398         fp = fopen("/proc/meminfo", "r");
 399         if (fp == NULL) {
 400                 warn("Failed to open file /proc/meminfo");
 401                 return smprintf("%s", UNKNOWN_STR);
 402         }
 403         fscanf(fp, "MemTotal: %ld kB\n", &total);
 404         fscanf(fp, "MemFree: %ld kB\n", &free);
 405         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 406         fscanf(fp, "Cached: %ld kB\n", &cached);
 407         fclose(fp);
 408
 409         return smprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024);
 410 }
 411
 412 static char *
 413 run_command(const char *cmd)
 414 {
 415         char *nlptr;
 416         FILE *fp;
 417         char buf[1024] = UNKNOWN_STR;
 418
 419         fp = popen(cmd, "r");
 420         if (fp == NULL) {
 421                 warn("Failed to get command output for %s", cmd);
 422                 return smprintf("%s", UNKNOWN_STR);
 423         }
 424         fgets(buf, sizeof(buf), fp);
 425         pclose(fp);
 426         buf[sizeof(buf)] = '\0';
 427
 428         if ((nlptr = strstr(buf, "\n")) != NULL) {
 429                 nlptr[0] = '\0';
 430         }
 431
 432         return smprintf("%s", buf);
 433 }
 434
 435 static char *
 436 swap_free(void)
 437 {
 438         long total, free;
 439         FILE *fp;
 440         char buf[2048];
 441         size_t bytes_read;
 442         char *match;
 443
 444         fp = fopen("/proc/meminfo", "r");
 445         if (fp == NULL) {
 446                 warn("Failed to open file /proc/meminfo");
 447                 return smprintf("%s", UNKNOWN_STR);
 448         }
 449
 450         if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) {
 451                 warn("swap_free: read error");
 452                 fclose(fp);
 453                 return smprintf("%s", UNKNOWN_STR);
 454         }
 455
 456         buf[bytes_read] = '\0';
 457         fclose(fp);
 458
 459         if ((match = strstr(buf, "SwapTotal")) == NULL) {
 460                 return smprintf("%s", UNKNOWN_STR);
 461         }
 462         sscanf(match, "SwapTotal: %ld kB\n", &total);
 463
 464         if ((match = strstr(buf, "SwapFree")) == NULL) {
 465                 return smprintf("%s", UNKNOWN_STR);
 466         }
 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("%s", UNKNOWN_STR);
 485         }
 486
 487         if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) {
 488                 warn("swap_perc: read error");
 489                 fclose(fp);
 490                 return smprintf("%s", UNKNOWN_STR);
 491         }
 492
 493         buf[bytes_read] = '\0';
 494         fclose(fp);
 495
 496         if ((match = strstr(buf, "SwapTotal")) == NULL) {
 497                 return smprintf("%s", UNKNOWN_STR);
 498         }
 499         sscanf(match, "SwapTotal: %ld kB\n", &total);
 500
 501         if ((match = strstr(buf, "SwapCached")) == NULL) {
 502                 return smprintf("%s", UNKNOWN_STR);
 503         }
 504         sscanf(match, "SwapCached: %ld kB\n", &cached);
 505
 506         if ((match = strstr(buf, "SwapFree")) == NULL) {
 507                 return smprintf("%s", UNKNOWN_STR);
 508         }
 509         sscanf(match, "SwapFree: %ld kB\n", &free);
 510
 511         return smprintf("%d%%", 100 * (total - free - cached) / total);
 512 }
 513
 514 static char *
 515 swap_total(void)
 516 {
 517         long total;
 518         FILE *fp;
 519         char buf[2048];
 520         size_t bytes_read;
 521         char *match;
 522
 523         fp = fopen("/proc/meminfo", "r");
 524         if (fp == NULL) {
 525                 warn("Failed to open file /proc/meminfo");
 526                 return smprintf("%s", UNKNOWN_STR);
 527         }
 528         if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) {
 529                 warn("swap_total: read error");
 530                 fclose(fp);
 531                 return smprintf("%s", UNKNOWN_STR);
 532         }
 533
 534         buf[bytes_read] = '\0';
 535         fclose(fp);
 536
 537         if ((match = strstr(buf, "SwapTotal")) == NULL) {
 538                 return smprintf("%s", UNKNOWN_STR);
 539         }
 540         sscanf(match, "SwapTotal: %ld kB\n", &total);
 541
 542         return smprintf("%f", (float)total / 1024 / 1024);
 543 }
 544
 545 static char *
 546 swap_used(void)
 547 {
 548         long total, free, cached;
 549         FILE *fp;
 550         char buf[2048];
 551         size_t bytes_read;
 552         char *match;
 553
 554         fp = fopen("/proc/meminfo", "r");
 555         if (fp == NULL) {
 556                 warn("Failed to open file /proc/meminfo");
 557                 return smprintf("%s", UNKNOWN_STR);
 558         }
 559         if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) {
 560                 warn("swap_used: read error");
 561                 fclose(fp);
 562                 return smprintf("%s", UNKNOWN_STR);
 563         }
 564
 565         buf[bytes_read] = '\0';
 566         fclose(fp);
 567
 568         if ((match = strstr(buf, "SwapTotal")) == NULL) {
 569                 return smprintf("%s", UNKNOWN_STR);
 570         }
 571         sscanf(match, "SwapTotal: %ld kB\n", &total);
 572
 573         if ((match = strstr(buf, "SwapCached")) == NULL) {
 574                 return smprintf("%s", UNKNOWN_STR);
 575         }
 576         sscanf(match, "SwapCached: %ld kB\n", &cached);
 577
 578         if ((match = strstr(buf, "SwapFree")) == NULL) {
 579                 return smprintf("%s", UNKNOWN_STR);
 580         }
 581         sscanf(match, "SwapFree: %ld kB\n", &free);
 582
 583         return smprintf("%f", (float)(total - free - cached) / 1024 / 1024);
 584 }
 585
 586 static char *
 587 temp(const char *file)
 588 {
 589         int temp;
 590         FILE *fp;
 591
 592         fp = fopen(file, "r");
 593         if (fp == NULL) {
 594                 warn("Failed to open file %s", file);
 595                 return smprintf("%s", UNKNOWN_STR);
 596         }
 597         fscanf(fp, "%d", &temp);
 598         fclose(fp);
 599
 600         return smprintf("%d°C", temp / 1000);
 601 }
 602
 603 static char *
 604 uptime(void)
 605 {
 606         struct sysinfo info;
 607         int h = 0;
 608         int m = 0;
 609
 610         sysinfo(&info);
 611         h = info.uptime / 3600;
 612         m = (info.uptime - h * 3600 ) / 60;
 613
 614         return smprintf("%dh %dm", h, m);
 615 }
 616
 617 static char *
 618 username(void)
 619 {
 620         uid_t uid = geteuid();
 621         struct passwd *pw = getpwuid(uid);
 622
 623         if (pw == NULL) {
 624                 warn("Failed to get username");
 625                 return smprintf("%s", UNKNOWN_STR);
 626         }
 627
 628         return smprintf("%s", pw->pw_name);
 629 }
 630
 631 static char *
 632 uid(void)
 633 {
 634         return smprintf("%d", geteuid());
 635 }
 636
 637
 638 static char *
 639 vol_perc(const char *card)
 640 {
 641         unsigned int i;
 642         int v, afd, devmask;
 643         char *vnames[] = SOUND_DEVICE_NAMES;
 644
 645         afd = open(card, O_RDONLY);
 646         if (afd < 0) {
 647                 warn("Cannot open %s", card);
 648                 return smprintf(UNKNOWN_STR);
 649         }
 650
 651         ioctl(afd, MIXER_READ(SOUND_MIXER_DEVMASK), &devmask);
 652         for (i = 0; i < (sizeof(vnames) / sizeof((vnames[0]))); i++) {
 653                 if (devmask & (1 << i)) {
 654                         if (!strcmp("vol", vnames[i])) {
 655                                 ioctl(afd, MIXER_READ(i), &v);
 656                         }
 657                 }
 658         }
 659
 660         close(afd);
 661
 662         return smprintf("%d%%", v & 0xff);
 663 }
 664
 665 static char *
 666 wifi_perc(const char *iface)
 667 {
 668         int perc;
 669         char buf[255];
 670         char *datastart;
 671         char path[PATH_MAX];
 672         char status[5];
 673         FILE *fp;
 674
 675         snprintf(path, sizeof(path), "%s%s%s", "/sys/class/net/", iface, "/operstate");
 676         fp = fopen(path, "r");
 677         if (fp == NULL) {
 678                 warn("Failed to open file %s", path);
 679                 return smprintf("%s", UNKNOWN_STR);
 680         }
 681         fgets(status, 5, fp);
 682         fclose(fp);
 683         if(strcmp(status, "up\n") != 0) {
 684                 return smprintf("%s", UNKNOWN_STR);
 685         }
 686
 687         fp = fopen("/proc/net/wireless", "r");
 688         if (fp == NULL) {
 689                 warn("Failed to open file /proc/net/wireless");
 690                 return smprintf("%s", UNKNOWN_STR);
 691         }
 692
 693         fgets(buf, sizeof(buf), fp);
 694         fgets(buf, sizeof(buf), fp);
 695         fgets(buf, sizeof(buf), fp);
 696         fclose(fp);
 697
 698         if ((datastart = strstr(buf, iface)) == NULL) {
 699                 return smprintf("%s", UNKNOWN_STR);
 700         }
 701         datastart = (datastart+(strlen(iface)+1));
 702         sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &perc);
 703
 704         return smprintf("%d%%", perc);
 705 }
 706
 707 static char *
 708 wifi_essid(const char *iface)
 709 {
 710         char id[IW_ESSID_MAX_SIZE+1];
 711         int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
 712         struct iwreq wreq;
 713
 714         memset(&wreq, 0, sizeof(struct iwreq));
 715         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 716         snprintf(wreq.ifr_name, sizeof(wreq.ifr_name), "%s", iface);
 717
 718         if (sockfd == -1) {
 719                 warn("Failed to get ESSID for interface %s", iface);
 720                 return smprintf("%s", UNKNOWN_STR);
 721         }
 722         wreq.u.essid.pointer = id;
 723         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 724                 warn("Failed to get ESSID for interface %s", iface);
 725                 return smprintf("%s", UNKNOWN_STR);
 726         }
 727
 728         close(sockfd);
 729
 730         if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
 731                 return smprintf("%s", UNKNOWN_STR);
 732         else
 733                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 734 }
 735
 736 static void
 737 sighandler(const int signo)
 738 {
 739         if (signo == SIGTERM || signo == SIGINT) {
 740                 done = 1;
 741         }
 742 }
 743
 744 static void
 745 usage(const int eval)
 746 {
 747         fprintf(stderr, "usage: %s [-d] [-o] [-v] [-h]\n", argv0);
 748         exit(eval);
 749 }
 750
 751 int
 752 main(int argc, char *argv[])
 753 {
 754         unsigned short int i;
 755         char status_string[2048];
 756         char *res, *element;
 757         struct arg argument;
 758         struct sigaction act;
 759
 760         ARGBEGIN {
 761                 case 'd':
 762                         dflag = 1;
 763                         break;
 764                 case 'o':
 765                         oflag = 1;
 766                         break;
 767                 case 'v':
 768                         printf("slstatus (C) 2016-2017 slstatus engineers\n");
 769                         return 0;
 770                 case 'h':
 771                         usage(0);
 772                 default:
 773                         usage(1);
 774         } ARGEND
 775
 776         if (dflag && oflag) {
 777                 usage(1);
 778         }
 779         if (dflag && daemon(1, 1) < 0) {
 780                 err(1, "daemon");
 781         }
 782
 783         memset(&act, 0, sizeof(act));
 784         act.sa_handler = sighandler;
 785         sigaction(SIGINT,  &act, 0);
 786         sigaction(SIGTERM, &act, 0);
 787
 788         if (!oflag) {
 789                 dpy = XOpenDisplay(NULL);
 790         }
 791
 792         setlocale(LC_ALL, "");
 793
 794         while (!done) {
 795                 status_string[0] = '\0';
 796
 797                 for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 798                         argument = args[i];
 799                         if (argument.args == NULL) {
 800                                 res = argument.func();
 801                         } else {
 802                                 res = argument.func(argument.args);
 803                         }
 804                         element = smprintf(argument.fmt, res);
 805                         if (element == NULL) {
 806                                 element = smprintf("%s", UNKNOWN_STR);
 807                                 warnx("Failed to format output");
 808                         }
 809                         strncat(status_string, element, sizeof(status_string) - strlen(status_string) - 1);
 810                         free(res);
 811                         free(element);
 812                 }
 813
 814                 if (!oflag) {
 815                         XStoreName(dpy, DefaultRootWindow(dpy), status_string);
 816                         XSync(dpy, False);
 817                 } else {
 818                         printf("%s\n", status_string);
 819                 }
 820
 821                 if ((UPDATE_INTERVAL - delay) <= 0) {
 822                         delay = 0;
 823                         continue;
 824                 } else {
 825                         sleep(UPDATE_INTERVAL - delay);
 826                         delay = 0;
 827                 }
 828         }
 829
 830         if (!oflag) {
 831                 XStoreName(dpy, DefaultRootWindow(dpy), NULL);
 832                 XCloseDisplay(dpy);
 833         }
 834
 835         return 0;
 836 }