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