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
  30 #include "extern/arg.h"
  31 #include "extern/strlcat.h"
  32
  33 struct arg {
  34         char *(*func)();
  35         const char *fmt;
  36         const char *args;
  37 };
  38
  39 static char *smprintf(const char *fmt, ...);
  40 static char *battery_perc(const char *bat);
  41 static char *battery_state(const char *bat);
  42 static char *cpu_perc(void);
  43 static char *datetime(const char *fmt);
  44 static char *disk_free(const char *mnt);
  45 static char *disk_perc(const char *mnt);
  46 static char *disk_total(const char *mnt);
  47 static char *disk_used(const char *mnt);
  48 static char *entropy(void);
  49 static char *gid(void);
  50 static char *hostname(void);
  51 static char *ip(const char *iface);
  52 static char *kernel_release(void);
  53 static char *load_avg(void);
  54 static char *ram_free(void);
  55 static char *ram_perc(void);
  56 static char *ram_used(void);
  57 static char *ram_total(void);
  58 static char *run_command(const char *cmd);
  59 static char *swap_free(void);
  60 static char *swap_perc(void);
  61 static char *swap_used(void);
  62 static char *swap_total(void);
  63 static char *temp(const char *file);
  64 static char *uid(void);
  65 static char *uptime(void);
  66 static char *username(void);
  67 static char *vol_perc(const char *card);
  68 static char *wifi_perc(const char *iface);
  69 static char *wifi_essid(const char *iface);
  70 static void sighandler(const int signo);
  71 static void usage(const int eval);
  72
  73 char *argv0;
  74 static unsigned short int delay = 0;
  75 static unsigned short int done;
  76 static unsigned short int dflag, oflag;
  77 static Display *dpy;
  78
  79 #include "config.h"
  80
  81 static char *
  82 smprintf(const char *fmt, ...)
  83 {
  84         va_list ap;
  85         char *ret;
  86         int len;
  87
  88         va_start(ap, fmt);
  89         len = vsnprintf(NULL, 0, fmt, ap);
  90         va_end(ap);
  91
  92         ret = malloc(++len);
  93         if (ret == NULL) {
  94                 err(1, "malloc");
  95         }
  96
  97         va_start(ap, fmt);
  98         vsnprintf(ret, len, fmt, ap);
  99         va_end(ap);
 100
 101         return ret;
 102 }
 103
 104 static char *
 105 battery_perc(const char *bat)
 106 {
 107         int perc;
 108         char path[PATH_MAX];
 109         FILE *fp;
 110
 111         snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/capacity");
 112         fp = fopen(path, "r");
 113         if (fp == NULL) {
 114                 warn("Failed to open file %s", path);
 115                 return smprintf("%s", UNKNOWN_STR);
 116         }
 117         fscanf(fp, "%i", &perc);
 118         fclose(fp);
 119
 120         return smprintf("%d%%", perc);
 121 }
 122
 123 static char *
 124 battery_state(const char *bat)
 125 {
 126         char path[PATH_MAX];
 127         char state[12];
 128         FILE *fp;
 129
 130         snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/status");
 131         fp = fopen(path, "r");
 132         if (fp == NULL) {
 133                 warn("Failed to open file %s", path);
 134                 return smprintf("%s", UNKNOWN_STR);
 135         }
 136         fscanf(fp, "%12s", state);
 137         fclose(fp);
 138
 139         if (strcmp(state, "Charging") == 0) {
 140                 return smprintf("+");
 141         } else if (strcmp(state, "Discharging") == 0) {
 142                 return smprintf("-");
 143         } else if (strcmp(state, "Full") == 0) {
 144                 return smprintf("=");
 145         } else {
 146                 return smprintf("?");
 147         }
 148 }
 149
 150 static char *
 151 cpu_perc(void)
 152 {
 153         int perc;
 154         long double a[4], b[4];
 155         FILE *fp;
 156
 157         fp = fopen("/proc/stat", "r");
 158         if (fp == NULL) {
 159                 warn("Failed to open file /proc/stat");
 160                 return smprintf("%s", UNKNOWN_STR);
 161         }
 162         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
 163         fclose(fp);
 164
 165         delay++;
 166         sleep(delay);
 167
 168         fp = fopen("/proc/stat", "r");
 169         if (fp == NULL) {
 170                 warn("Failed to open file /proc/stat");
 171                 return smprintf("%s", UNKNOWN_STR);
 172         }
 173         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
 174         fclose(fp);
 175
 176         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]));
 177         return smprintf("%d%%", perc);
 178 }
 179
 180 static char *
 181 datetime(const char *fmt)
 182 {
 183         time_t t;
 184         char str[80];
 185
 186         t = time(NULL);
 187         if (strftime(str, sizeof(str), fmt, localtime(&t)) == 0) {
 188                 return smprintf("%s", UNKNOWN_STR);
 189         }
 190
 191         return smprintf("%s", str);
 192 }
 193
 194 static char *
 195 disk_free(const char *mnt)
 196 {
 197         struct statvfs fs;
 198
 199         if (statvfs(mnt, &fs) < 0) {
 200                 warn("Failed to get filesystem info");
 201                 return smprintf("%s", UNKNOWN_STR);
 202         }
 203
 204         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
 205 }
 206
 207 static char *
 208 disk_perc(const char *mnt)
 209 {
 210         int perc;
 211         struct statvfs fs;
 212
 213         if (statvfs(mnt, &fs) < 0) {
 214                 warn("Failed to get filesystem info");
 215                 return smprintf("%s", UNKNOWN_STR);
 216         }
 217
 218         perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
 219
 220         return smprintf("%d%%", perc);
 221 }
 222
 223 static char *
 224 disk_total(const char *mnt)
 225 {
 226         struct statvfs fs;
 227
 228         if (statvfs(mnt, &fs) < 0) {
 229                 warn("Failed to get filesystem info");
 230                 return smprintf("%s", UNKNOWN_STR);
 231         }
 232
 233         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
 234 }
 235
 236 static char *
 237 disk_used(const char *mnt)
 238 {
 239         struct statvfs fs;
 240
 241         if (statvfs(mnt, &fs) < 0) {
 242                 warn("Failed to get filesystem info");
 243                 return smprintf("%s", UNKNOWN_STR);
 244         }
 245
 246         return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
 247 }
 248
 249 static char *
 250 entropy(void)
 251 {
 252         int num;
 253         FILE *fp;
 254
 255         fp= fopen("/proc/sys/kernel/random/entropy_avail", "r");
 256         if (fp == NULL) {
 257                 warn("Failed to open file /proc/sys/kernel/random/entropy_avail");
 258                 return smprintf("%s", UNKNOWN_STR);
 259         }
 260         fscanf(fp, "%d", &num);
 261         fclose(fp);
 262
 263         return smprintf("%d", num);
 264 }
 265
 266 static char *
 267 gid(void)
 268 {
 269         return smprintf("%d", getgid());
 270 }
 271
 272 static char *
 273 hostname(void)
 274 {
 275         char buf[HOST_NAME_MAX];
 276
 277         if (gethostname(buf, sizeof(buf)) == -1) {
 278                 warn("hostname");
 279                 return smprintf("%s", UNKNOWN_STR);
 280         }
 281
 282         return smprintf("%s", buf);
 283 }
 284
 285 static char *
 286 ip(const char *iface)
 287 {
 288         struct ifaddrs *ifaddr, *ifa;
 289         int s;
 290         char host[NI_MAXHOST];
 291
 292         if (getifaddrs(&ifaddr) == -1) {
 293                 warn("Failed to get IP address for interface %s", iface);
 294                 return smprintf("%s", UNKNOWN_STR);
 295         }
 296
 297         for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
 298                 if (ifa->ifa_addr == NULL) {
 299                         continue;
 300                 }
 301                 s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
 302                 if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
 303                         if (s != 0) {
 304                                 warnx("Failed to get IP address for interface %s", iface);
 305                                 return smprintf("%s", UNKNOWN_STR);
 306                         }
 307                         return smprintf("%s", host);
 308                 }
 309         }
 310
 311         freeifaddrs(ifaddr);
 312
 313         return smprintf("%s", UNKNOWN_STR);
 314 }
 315
 316 static char *
 317 kernel_release(void)
 318 {
 319         struct utsname udata;
 320
 321         if (uname(&udata) < 0) {
 322                 return smprintf(UNKNOWN_STR);
 323         }
 324
 325         return smprintf("%s", udata.release);
 326 }
 327
 328 static char *
 329 load_avg(void)
 330 {
 331         double avgs[3];
 332
 333         if (getloadavg(avgs, 3) < 0) {
 334                 warnx("Failed to get the load avg");
 335                 return smprintf("%s", UNKNOWN_STR);
 336         }
 337
 338         return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
 339 }
 340
 341 static char *
 342 ram_free(void)
 343 {
 344         long free;
 345         FILE *fp;
 346
 347         fp = fopen("/proc/meminfo", "r");
 348         if (fp == NULL) {
 349                 warn("Failed to open file /proc/meminfo");
 350                 return smprintf("%s", UNKNOWN_STR);
 351         }
 352         fscanf(fp, "MemFree: %ld kB\n", &free);
 353         fclose(fp);
 354
 355         return smprintf("%f", (float)free / 1024 / 1024);
 356 }
 357
 358 static char *
 359 ram_perc(void)
 360 {
 361         long total, free, buffers, cached;
 362         FILE *fp;
 363
 364         fp = fopen("/proc/meminfo", "r");
 365         if (fp == NULL) {
 366                 warn("Failed to open file /proc/meminfo");
 367                 return smprintf("%s", UNKNOWN_STR);
 368         }
 369         fscanf(fp, "MemTotal: %ld kB\n", &total);
 370         fscanf(fp, "MemFree: %ld kB\n", &free);
 371         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 372         fscanf(fp, "Cached: %ld kB\n", &cached);
 373         fclose(fp);
 374
 375         return smprintf("%d%%", 100 * ((total - free) - (buffers + cached)) / total);
 376 }
 377
 378 static char *
 379 ram_total(void)
 380 {
 381         long total;
 382         FILE *fp;
 383
 384         fp = fopen("/proc/meminfo", "r");
 385         if (fp == NULL) {
 386                 warn("Failed to open file /proc/meminfo");
 387                 return smprintf("%s", UNKNOWN_STR);
 388         }
 389         fscanf(fp, "MemTotal: %ld kB\n", &total);
 390         fclose(fp);
 391
 392         return smprintf("%f", (float)total / 1024 / 1024);
 393 }
 394
 395 static char *
 396 ram_used(void)
 397 {
 398         long free, total, buffers, cached;
 399         FILE *fp;
 400
 401         fp = fopen("/proc/meminfo", "r");
 402         if (fp == NULL) {
 403                 warn("Failed to open file /proc/meminfo");
 404                 return smprintf("%s", UNKNOWN_STR);
 405         }
 406         fscanf(fp, "MemTotal: %ld kB\n", &total);
 407         fscanf(fp, "MemFree: %ld kB\n", &free);
 408         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 409         fscanf(fp, "Cached: %ld kB\n", &cached);
 410         fclose(fp);
 411
 412         return smprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024);
 413 }
 414
 415 static char *
 416 run_command(const char *cmd)
 417 {
 418         char *nlptr;
 419         FILE *fp;
 420         char buf[1024] = UNKNOWN_STR;
 421
 422         fp = popen(cmd, "r");
 423         if (fp == NULL) {
 424                 warn("Failed to get command output for %s", cmd);
 425                 return smprintf("%s", UNKNOWN_STR);
 426         }
 427         fgets(buf, sizeof(buf), fp);
 428         pclose(fp);
 429         buf[sizeof(buf)] = '\0';
 430
 431         if ((nlptr = strstr(buf, "\n")) != NULL) {
 432                 nlptr[0] = '\0';
 433         }
 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("%s", UNKNOWN_STR);
 451         }
 452
 453         if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) {
 454                 warn("swap_free: read error");
 455                 fclose(fp);
 456                 return smprintf("%s", UNKNOWN_STR);
 457         }
 458
 459         buf[bytes_read] = '\0';
 460         fclose(fp);
 461
 462         if ((match = strstr(buf, "SwapTotal")) == NULL) {
 463                 return smprintf("%s", UNKNOWN_STR);
 464         }
 465         sscanf(match, "SwapTotal: %ld kB\n", &total);
 466
 467         if ((match = strstr(buf, "SwapFree")) == NULL) {
 468                 return smprintf("%s", UNKNOWN_STR);
 469         }
 470         sscanf(match, "SwapFree: %ld kB\n", &free);
 471
 472         return smprintf("%f", (float)free / 1024 / 1024);
 473 }
 474
 475 static char *
 476 swap_perc(void)
 477 {
 478         long total, free, cached;
 479         FILE *fp;
 480         char buf[2048];
 481         size_t bytes_read;
 482         char *match;
 483
 484         fp = fopen("/proc/meminfo", "r");
 485         if (fp == NULL) {
 486                 warn("Failed to open file /proc/meminfo");
 487                 return smprintf("%s", UNKNOWN_STR);
 488         }
 489
 490         if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) {
 491                 warn("swap_perc: read error");
 492                 fclose(fp);
 493                 return smprintf("%s", UNKNOWN_STR);
 494         }
 495
 496         buf[bytes_read] = '\0';
 497         fclose(fp);
 498
 499         if ((match = strstr(buf, "SwapTotal")) == NULL) {
 500                 return smprintf("%s", UNKNOWN_STR);
 501         }
 502         sscanf(match, "SwapTotal: %ld kB\n", &total);
 503
 504         if ((match = strstr(buf, "SwapCached")) == NULL) {
 505                 return smprintf("%s", UNKNOWN_STR);
 506         }
 507         sscanf(match, "SwapCached: %ld kB\n", &cached);
 508
 509         if ((match = strstr(buf, "SwapFree")) == NULL) {
 510                 return smprintf("%s", UNKNOWN_STR);
 511         }
 512         sscanf(match, "SwapFree: %ld kB\n", &free);
 513
 514         return smprintf("%d%%", 100 * (total - free - cached) / total);
 515 }
 516
 517 static char *
 518 swap_total(void)
 519 {
 520         long total;
 521         FILE *fp;
 522         char buf[2048];
 523         size_t bytes_read;
 524         char *match;
 525
 526         fp = fopen("/proc/meminfo", "r");
 527         if (fp == NULL) {
 528                 warn("Failed to open file /proc/meminfo");
 529                 return smprintf("%s", UNKNOWN_STR);
 530         }
 531         if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) {
 532                 warn("swap_total: read error");
 533                 fclose(fp);
 534                 return smprintf("%s", UNKNOWN_STR);
 535         }
 536
 537         buf[bytes_read] = '\0';
 538         fclose(fp);
 539
 540         if ((match = strstr(buf, "SwapTotal")) == NULL) {
 541                 return smprintf("%s", UNKNOWN_STR);
 542         }
 543         sscanf(match, "SwapTotal: %ld kB\n", &total);
 544
 545         return smprintf("%f", (float)total / 1024 / 1024);
 546 }
 547
 548 static char *
 549 swap_used(void)
 550 {
 551         long total, free, cached;
 552         FILE *fp;
 553         char buf[2048];
 554         size_t bytes_read;
 555         char *match;
 556
 557         fp = fopen("/proc/meminfo", "r");
 558         if (fp == NULL) {
 559                 warn("Failed to open file /proc/meminfo");
 560                 return smprintf("%s", UNKNOWN_STR);
 561         }
 562         if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) {
 563                 warn("swap_used: read error");
 564                 fclose(fp);
 565                 return smprintf("%s", UNKNOWN_STR);
 566         }
 567
 568         buf[bytes_read] = '\0';
 569         fclose(fp);
 570
 571         if ((match = strstr(buf, "SwapTotal")) == NULL) {
 572                 return smprintf("%s", UNKNOWN_STR);
 573         }
 574         sscanf(match, "SwapTotal: %ld kB\n", &total);
 575
 576         if ((match = strstr(buf, "SwapCached")) == NULL) {
 577                 return smprintf("%s", UNKNOWN_STR);
 578         }
 579         sscanf(match, "SwapCached: %ld kB\n", &cached);
 580
 581         if ((match = strstr(buf, "SwapFree")) == NULL) {
 582                 return smprintf("%s", UNKNOWN_STR);
 583         }
 584         sscanf(match, "SwapFree: %ld kB\n", &free);
 585
 586         return smprintf("%f", (float)(total - free - cached) / 1024 / 1024);
 587 }
 588
 589 static char *
 590 temp(const char *file)
 591 {
 592         int temp;
 593         FILE *fp;
 594
 595         fp = fopen(file, "r");
 596         if (fp == NULL) {
 597                 warn("Failed to open file %s", file);
 598                 return smprintf("%s", UNKNOWN_STR);
 599         }
 600         fscanf(fp, "%d", &temp);
 601         fclose(fp);
 602
 603         return smprintf("%d°C", temp / 1000);
 604 }
 605
 606 static char *
 607 uptime(void)
 608 {
 609         struct sysinfo info;
 610         int h = 0;
 611         int m = 0;
 612
 613         sysinfo(&info);
 614         h = info.uptime / 3600;
 615         m = (info.uptime - h * 3600 ) / 60;
 616
 617         return smprintf("%dh %dm", h, m);
 618 }
 619
 620 static char *
 621 username(void)
 622 {
 623         uid_t uid = geteuid();
 624         struct passwd *pw = getpwuid(uid);
 625
 626         if (pw == NULL) {
 627                 warn("Failed to get username");
 628                 return smprintf("%s", UNKNOWN_STR);
 629         }
 630
 631         return smprintf("%s", pw->pw_name);
 632 }
 633
 634 static char *
 635 uid(void)
 636 {
 637         return smprintf("%d", geteuid());
 638 }
 639
 640
 641 static char *
 642 vol_perc(const char *card)
 643 {
 644         unsigned int i;
 645         int v, afd, devmask;
 646         char *vnames[] = SOUND_DEVICE_NAMES;
 647
 648         afd = open(card, O_RDONLY);
 649         if (afd < 0) {
 650                 warn("Cannot open %s", card);
 651                 return smprintf(UNKNOWN_STR);
 652         }
 653
 654         ioctl(afd, MIXER_READ(SOUND_MIXER_DEVMASK), &devmask);
 655         for (i = 0; i < (sizeof(vnames) / sizeof((vnames[0]))); i++) {
 656                 if (devmask & (1 << i)) {
 657                         if (!strcmp("vol", vnames[i])) {
 658                                 ioctl(afd, MIXER_READ(i), &v);
 659                         }
 660                 }
 661         }
 662
 663         close(afd);
 664         if (v == 0) {
 665                 return smprintf("mute");
 666         }
 667         return smprintf("%d%%", v & 0xff);
 668 }
 669
 670 static char *
 671 wifi_perc(const char *iface)
 672 {
 673         int perc;
 674         char buf[255];
 675         char *datastart;
 676         char path[PATH_MAX];
 677         char status[5];
 678         FILE *fp;
 679
 680         snprintf(path, sizeof(path), "%s%s%s", "/sys/class/net/", iface, "/operstate");
 681         fp = fopen(path, "r");
 682         if (fp == NULL) {
 683                 warn("Failed to open file %s", path);
 684                 return smprintf("%s", UNKNOWN_STR);
 685         }
 686         fgets(status, 5, fp);
 687         fclose(fp);
 688         if(strcmp(status, "up\n") != 0) {
 689                 return smprintf("%s", UNKNOWN_STR);
 690         }
 691
 692         fp = fopen("/proc/net/wireless", "r");
 693         if (fp == NULL) {
 694                 warn("Failed to open file /proc/net/wireless");
 695                 return smprintf("%s", UNKNOWN_STR);
 696         }
 697
 698         fgets(buf, sizeof(buf), fp);
 699         fgets(buf, sizeof(buf), fp);
 700         fgets(buf, sizeof(buf), fp);
 701         fclose(fp);
 702
 703         if ((datastart = strstr(buf, iface)) == NULL) {
 704                 return smprintf("%s", UNKNOWN_STR);
 705         }
 706         datastart = (datastart+(strlen(iface)+1));
 707         sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &perc);
 708
 709         return smprintf("%d%%", perc);
 710 }
 711
 712 static char *
 713 wifi_essid(const char *iface)
 714 {
 715         char id[IW_ESSID_MAX_SIZE+1];
 716         int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
 717         struct iwreq wreq;
 718
 719         memset(&wreq, 0, sizeof(struct iwreq));
 720         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 721         snprintf(wreq.ifr_name, sizeof(wreq.ifr_name), "%s", iface);
 722
 723         if (sockfd == -1) {
 724                 warn("Failed to get ESSID for interface %s", iface);
 725                 return smprintf("%s", UNKNOWN_STR);
 726         }
 727         wreq.u.essid.pointer = id;
 728         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 729                 warn("Failed to get ESSID for interface %s", iface);
 730                 return smprintf("%s", UNKNOWN_STR);
 731         }
 732
 733         close(sockfd);
 734
 735         if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
 736                 return smprintf("%s", UNKNOWN_STR);
 737         else
 738                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 739 }
 740
 741 static void
 742 sighandler(const int signo)
 743 {
 744         if (signo == SIGTERM || signo == SIGINT) {
 745                 done = 1;
 746         }
 747 }
 748
 749 static void
 750 usage(const int eval)
 751 {
 752         fprintf(stderr, "usage: %s [-d] [-o] [-v] [-h]\n", argv0);
 753         exit(eval);
 754 }
 755
 756 int
 757 main(int argc, char *argv[])
 758 {
 759         unsigned short int i;
 760         char status_string[2048];
 761         char *res, *element;
 762         struct arg argument;
 763         struct sigaction act;
 764
 765         ARGBEGIN {
 766                 case 'd':
 767                         dflag = 1;
 768                         break;
 769                 case 'o':
 770                         oflag = 1;
 771                         break;
 772                 case 'v':
 773                         printf("slstatus (C) 2016-2017 slstatus engineers\n");
 774                         return 0;
 775                 case 'h':
 776                         usage(0);
 777                 default:
 778                         usage(1);
 779         } ARGEND
 780
 781         if (dflag && oflag) {
 782                 usage(1);
 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("%s", 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                         }
 817                         free(res);
 818                         free(element);
 819                 }
 820
 821                 if (!oflag) {
 822                         XStoreName(dpy, DefaultRootWindow(dpy), status_string);
 823                         XSync(dpy, False);
 824                 } else {
 825                         printf("%s\n", status_string);
 826                 }
 827
 828                 if ((UPDATE_INTERVAL - delay) <= 0) {
 829                         delay = 0;
 830                         continue;
 831                 } else {
 832                         sleep(UPDATE_INTERVAL - delay);
 833                         delay = 0;
 834                 }
 835         }
 836
 837         if (!oflag) {
 838                 XStoreName(dpy, DefaultRootWindow(dpy), NULL);
 839                 XCloseDisplay(dpy);
 840         }
 841
 842         return 0;
 843 }