slstatus.c

   1 /* See LICENSE file for copyright and license details. */
   2
   3 #include <alsa/asoundlib.h>
   4 #include <arpa/inet.h>
   5 #include <fcntl.h>
   6 #include <ifaddrs.h>
   7 #include <limits.h>
   8 #include <linux/wireless.h>
   9 #include <locale.h>
  10 #include <netdb.h>
  11 #include <pwd.h>
  12 #include <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 "strlcat.h"
  30 #include "strlcpy.h"
  31
  32 typedef char *(*op_fun) (const char *);
  33 struct arg {
  34         op_fun func;
  35         const char *format;
  36         const char *args;
  37 };
  38
  39 void setstatus(const char *);
  40 char *smprintf(const char *, ...);
  41 char *battery_perc(const char *);
  42 char *cpu_perc(const char *);
  43 char *datetime(const char *);
  44 char *disk_free(const char *);
  45 char *disk_perc(const char *);
  46 char *disk_total(const char *);
  47 char *disk_used(const char *);
  48 char *entropy(const char *);
  49 char *gid(const char *);
  50 char *hostname(const char *);
  51 char *ip(const char *);
  52 char *load_avg(const char *);
  53 char *ram_free(const char *);
  54 char *ram_perc(const char *);
  55 char *ram_used(const char *);
  56 char *ram_total(const char *);
  57 char *run_command(const char *);
  58 char *temp(const char *);
  59 char *uid(const char *);
  60 char *uptime(const char *);
  61 char *username(const char *);
  62 char *vol_perc(const char *);
  63 char *wifi_perc(const char *);
  64 char *wifi_essid(const char *);
  65
  66 static Display *dpy;
  67
  68 #include "config.h"
  69
  70 void
  71 setstatus(const char *str)
  72 {
  73         /* set WM_NAME via X11 */
  74         XStoreName(dpy, DefaultRootWindow(dpy), str);
  75         XSync(dpy, False);
  76 }
  77
  78 char *
  79 smprintf(const char *fmt, ...)
  80 {
  81         va_list fmtargs;
  82         char *ret = NULL;
  83
  84         va_start(fmtargs, fmt);
  85         if (vasprintf(&ret, fmt, fmtargs) < 0)
  86                 return NULL;
  87         va_end(fmtargs);
  88
  89         return ret;
  90 }
  91
  92 char *
  93 battery_perc(const char *battery)
  94 {
  95         int now, full, perc;
  96         char batterynowfile[64] = "";
  97         char batteryfullfile[64] = "";
  98         FILE *fp;
  99
 100         strlcat(batterynowfile, batterypath, sizeof(batterynowfile));
 101         strlcat(batterynowfile, battery, sizeof(batterynowfile));
 102         strlcat(batterynowfile, "/", sizeof(batterynowfile));
 103         strlcat(batterynowfile, batterynow, sizeof(batterynowfile));
 104
 105         strlcat(batteryfullfile, batterypath, sizeof(batteryfullfile));
 106         strlcat(batteryfullfile, battery, sizeof(batteryfullfile));
 107         strlcat(batteryfullfile, "/", sizeof(batteryfullfile));
 108         strlcat(batteryfullfile, batteryfull, sizeof(batteryfullfile));
 109
 110         if (!(fp = fopen(batterynowfile, "r"))) {
 111                 fprintf(stderr, "Error opening battery file: %s.\n", batterynowfile);
 112                 return smprintf(unknowntext);
 113         }
 114
 115         fscanf(fp, "%i", &now);
 116         fclose(fp);
 117
 118         if (!(fp = fopen(batteryfullfile, "r"))) {
 119                 fprintf(stderr, "Error opening battery file.\n");
 120                 return smprintf(unknowntext);
 121         }
 122
 123         fscanf(fp, "%i", &full);
 124         fclose(fp);
 125
 126         perc = now / (full / 100);
 127
 128         return smprintf("%d%%", perc);
 129 }
 130
 131 char *
 132 cpu_perc(const char *null)
 133 {
 134         int perc;
 135         long double a[4], b[4];
 136         FILE *fp;
 137
 138         if (!(fp = fopen("/proc/stat","r"))) {
 139                 fprintf(stderr, "Error opening stat file.\n");
 140                 return smprintf(unknowntext);
 141         }
 142
 143         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
 144         fclose(fp);
 145
 146         /* wait a second (for avg values) */
 147         sleep(1);
 148
 149         if (!(fp = fopen("/proc/stat","r"))) {
 150                 fprintf(stderr, "Error opening stat file.\n");
 151                 return smprintf(unknowntext);
 152         }
 153
 154         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
 155         fclose(fp);
 156         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]));
 157         return smprintf("%d%%", perc);
 158 }
 159
 160 char *
 161 datetime(const char *timeformat)
 162 {
 163         time_t tm;
 164         size_t bufsize = 64;
 165         char *buf = malloc(bufsize);
 166         if (buf == NULL) {
 167                 fprintf(stderr, "Failed to get date/time.\n");
 168                 return smprintf(unknowntext);
 169         }
 170
 171         time(&tm);
 172         setlocale(LC_TIME, "");
 173         if (!strftime(buf, bufsize, timeformat, localtime(&tm))) {
 174                 setlocale(LC_TIME, "C");
 175                 free(buf);
 176                 fprintf(stderr, "Strftime failed.\n");
 177                 return smprintf(unknowntext);
 178         }
 179
 180         setlocale(LC_TIME, "C");
 181         char *ret = smprintf("%s", buf);
 182         free(buf);
 183         return ret;
 184 }
 185
 186 char *
 187 disk_free(const char *mountpoint)
 188 {
 189         struct statvfs fs;
 190
 191         if (statvfs(mountpoint, &fs) < 0) {
 192                 fprintf(stderr, "Could not get filesystem info.\n");
 193                 return smprintf(unknowntext);
 194         }
 195         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
 196 }
 197
 198 char *
 199 disk_perc(const char *mountpoint)
 200 {
 201         int perc = 0;
 202         struct statvfs fs;
 203
 204         if (statvfs(mountpoint, &fs) < 0) {
 205                 fprintf(stderr, "Could not get filesystem info.\n");
 206                 return smprintf(unknowntext);
 207         }
 208
 209         perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
 210         return smprintf("%d%%", perc);
 211 }
 212
 213 char *
 214 disk_total(const char *mountpoint)
 215 {
 216         struct statvfs fs;
 217
 218         if (statvfs(mountpoint, &fs) < 0) {
 219                 fprintf(stderr, "Could not get filesystem info.\n");
 220                 return smprintf(unknowntext);
 221         }
 222
 223         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
 224 }
 225
 226 char *
 227 disk_used(const char *mountpoint)
 228 {
 229         struct statvfs fs;
 230
 231         if (statvfs(mountpoint, &fs) < 0) {
 232                 fprintf(stderr, "Could not get filesystem info.\n");
 233                 return smprintf(unknowntext);
 234         }
 235
 236         return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
 237 }
 238
 239 char *
 240 entropy(const char *null)
 241 {
 242         int entropy = 0;
 243         FILE *fp;
 244
 245         if (!(fp = fopen("/proc/sys/kernel/random/entropy_avail", "r"))) {
 246                 fprintf(stderr, "Could not open entropy file.\n");
 247                 return smprintf(unknowntext);
 248         }
 249
 250         fscanf(fp, "%d", &entropy);
 251         fclose(fp);
 252         return smprintf("%d", entropy);
 253 }
 254
 255 char *
 256 gid(const char *null)
 257 {
 258         gid_t gid;
 259
 260         if ((gid = getgid()) < 0) {
 261                 fprintf(stderr, "Could no get gid.\n");
 262                 return smprintf(unknowntext);
 263         } else
 264                 return smprintf("%d", gid);
 265         return smprintf(unknowntext);
 266 }
 267
 268 char *
 269 hostname(const char *null)
 270 {
 271         char hostname[HOST_NAME_MAX];
 272         FILE *fp;
 273
 274         if (!(fp = fopen("/proc/sys/kernel/hostname", "r"))) {
 275                 fprintf(stderr, "Could not open hostname file.\n");
 276                 return smprintf(unknowntext);
 277         }
 278
 279         fscanf(fp, "%s\n", hostname);
 280         fclose(fp);
 281         return smprintf("%s", hostname);
 282 }
 283
 284 char *
 285 ip(const char *interface)
 286 {
 287         struct ifaddrs *ifaddr, *ifa;
 288         int s;
 289         char host[NI_MAXHOST];
 290
 291         if (getifaddrs(&ifaddr) == -1) {
 292                 fprintf(stderr, "Error getting IP address.\n");
 293                 return smprintf(unknowntext);
 294         }
 295
 296         /* get the ip address */
 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
 303                 if ((strcmp(ifa->ifa_name, interface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
 304                         if (s != 0) {
 305                                 fprintf(stderr, "Error getting IP address.\n");
 306                                 return smprintf(unknowntext);
 307                         }
 308                         return smprintf("%s", host);
 309                 }
 310         }
 311
 312         /* free the address */
 313         freeifaddrs(ifaddr);
 314
 315         return smprintf(unknowntext);
 316 }
 317
 318 char *
 319 load_avg(const char *null)
 320 {
 321         double avgs[3];
 322
 323         if (getloadavg(avgs, 3) < 0) {
 324                 fprintf(stderr, "Error getting load avg.\n");
 325                 return smprintf(unknowntext);
 326         }
 327
 328         return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
 329 }
 330
 331 char *
 332 ram_free(const char *null)
 333 {
 334         long free;
 335         FILE *fp;
 336
 337         if (!(fp = fopen("/proc/meminfo", "r"))) {
 338                 fprintf(stderr, "Error opening meminfo file.\n");
 339                 return smprintf(unknowntext);
 340         }
 341
 342         fscanf(fp, "MemFree: %ld kB\n", &free);
 343         fclose(fp);
 344         return smprintf("%f", (float)free / 1024 / 1024);
 345 }
 346
 347 char *
 348 ram_perc(const char *null)
 349 {
 350         int perc;
 351         long total, free, buffers, cached;
 352         FILE *fp;
 353
 354         if (!(fp = fopen("/proc/meminfo", "r"))) {
 355                 fprintf(stderr, "Error opening meminfo file.\n");
 356                 return smprintf(unknowntext);
 357         }
 358
 359         fscanf(fp, "MemTotal: %ld kB\n", &total);
 360         fscanf(fp, "MemFree: %ld kB\n", &free);
 361         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 362         fscanf(fp, "Cached: %ld kB\n", &cached);
 363
 364         fclose(fp);
 365         perc = 100 * ((total - free) - (buffers + cached)) / total;
 366         return smprintf("%d%%", perc);
 367 }
 368
 369 char *
 370 ram_total(const char *null)
 371 {
 372         long total;
 373         FILE *fp;
 374
 375         if (!(fp = fopen("/proc/meminfo", "r"))) {
 376                 fprintf(stderr, "Error opening meminfo file.\n");
 377                 return smprintf(unknowntext);
 378         }
 379
 380         fscanf(fp, "MemTotal: %ld kB\n", &total);
 381         fclose(fp);
 382         return smprintf("%f", (float)total / 1024 / 1024);
 383 }
 384
 385 char *
 386 ram_used(const char *null)
 387 {
 388         long free, total, buffers, cached, used;
 389         FILE *fp;
 390
 391         if (!(fp = fopen("/proc/meminfo", "r"))) {
 392                 fprintf(stderr, "Error opening meminfo file.\n");
 393                 return smprintf(unknowntext);
 394         }
 395
 396         fscanf(fp, "MemTotal: %ld kB\n", &total);
 397         fscanf(fp, "MemFree: %ld kB\n", &free);
 398         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 399         fscanf(fp, "Cached: %ld kB\n", &cached);
 400
 401         fclose(fp);
 402         used = total - free - buffers - cached;
 403         return smprintf("%f", (float)used / 1024 / 1024);
 404 }
 405
 406 char *
 407 run_command(const char* command)
 408 {
 409         int good;
 410         FILE *fp;
 411         char buffer[64];
 412
 413         if (!(fp = popen(command, "r"))) {
 414                 fprintf(stderr, "Could not get command output for: %s.\n", command);
 415                 return smprintf(unknowntext);
 416         }
 417
 418         fgets(buffer, sizeof(buffer) - 1, fp);
 419         pclose(fp);
 420         for (int i = 0 ; i != sizeof(buffer); i++) {
 421                 if (buffer[i] == '\0') {
 422                         good = 1;
 423                         break;
 424                 }
 425         }
 426         if (good)
 427                 buffer[strlen(buffer) - 1] = '\0';
 428         return smprintf("%s", buffer);
 429 }
 430
 431 char *
 432 temp(const char *file)
 433 {
 434         int temperature;
 435         FILE *fp;
 436
 437         if (!(fp = fopen(file, "r"))) {
 438                 fprintf(stderr, "Could not open temperature file.\n");
 439                 return smprintf(unknowntext);
 440         }
 441
 442         fscanf(fp, "%d", &temperature);
 443         fclose(fp);
 444         return smprintf("%d°C", temperature / 1000);
 445 }
 446
 447 char *
 448 uptime(const char *null)
 449 {
 450         struct sysinfo info;
 451         int hours = 0;
 452         int minutes = 0;
 453
 454         sysinfo(&info);
 455         hours = info.uptime / 3600;
 456         minutes = (info.uptime - hours * 3600 ) / 60;
 457
 458         return smprintf("%dh %dm", hours, minutes);
 459 }
 460
 461 char *
 462 username(const char *null)
 463 {
 464         register struct passwd *pw;
 465         register uid_t uid;
 466
 467         uid = geteuid();
 468         pw = getpwuid(uid);
 469
 470         if (pw)
 471                 return smprintf("%s", pw->pw_name);
 472         else {
 473                 fprintf(stderr, "Could not get username.\n");
 474                 return smprintf(unknowntext);
 475         }
 476
 477         return smprintf(unknowntext);
 478 }
 479
 480 char *
 481 uid(const char *null)
 482 {
 483         register uid_t uid;
 484
 485         uid = geteuid();
 486
 487         if (uid)
 488                 return smprintf("%d", uid);
 489         else {
 490                 fprintf(stderr, "Could not get uid.\n");
 491                 return smprintf(unknowntext);
 492         }
 493
 494         return smprintf(unknowntext);
 495 }
 496
 497
 498 char *
 499 vol_perc(const char *soundcard)
 500 {
 501         int mute = 0;
 502         long vol = 0, max = 0, min = 0;
 503         snd_mixer_t *handle;
 504         snd_mixer_elem_t *pcm_mixer, *mas_mixer;
 505         snd_mixer_selem_id_t *vol_info, *mute_info;
 506
 507         snd_mixer_open(&handle, 0);
 508         snd_mixer_attach(handle, soundcard);
 509         snd_mixer_selem_register(handle, NULL, NULL);
 510         snd_mixer_load(handle);
 511
 512         snd_mixer_selem_id_malloc(&vol_info);
 513         snd_mixer_selem_id_malloc(&mute_info);
 514         if (vol_info == NULL || mute_info == NULL) {
 515                 fprintf(stderr, "Could not get alsa volume.\n");
 516                 return smprintf(unknowntext);
 517         }
 518         snd_mixer_selem_id_set_name(vol_info, channel);
 519         snd_mixer_selem_id_set_name(mute_info, channel);
 520         pcm_mixer = snd_mixer_find_selem(handle, vol_info);
 521         mas_mixer = snd_mixer_find_selem(handle, mute_info);
 522
 523         snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, &min, &max);
 524         snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, SND_MIXER_SCHN_MONO, &vol);
 525         snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO, &mute);
 526
 527         if (vol_info)
 528                 snd_mixer_selem_id_free(vol_info);
 529         if (mute_info)
 530                 snd_mixer_selem_id_free(mute_info);
 531         if (handle)
 532                 snd_mixer_close(handle);
 533
 534         if (!mute)
 535                 return smprintf("mute");
 536         else
 537                 return smprintf("%d%%", (vol * 100) / max);
 538 }
 539
 540 char *
 541 wifi_perc(const char *wificard)
 542 {
 543         int bufsize = 255;
 544         int strength;
 545         char buf[bufsize];
 546         char *datastart;
 547         char path[64];
 548         char status[5];
 549         char needle[sizeof wificard + 1];
 550         FILE *fp;
 551
 552         memset(path, 0, sizeof path);
 553         strlcat(path, "/sys/class/net/", sizeof(path));
 554         strlcat(path, wificard, sizeof(path));
 555         strlcat(path, "/operstate", sizeof(path));
 556
 557         if(!(fp = fopen(path, "r"))) {
 558                 fprintf(stderr, "Error opening wifi operstate file.\n");
 559                 return smprintf(unknowntext);
 560         }
 561
 562         fgets(status, 5, fp);
 563         fclose(fp);
 564         if(strcmp(status, "up\n") != 0)
 565                 return smprintf(unknowntext);
 566
 567         if (!(fp = fopen("/proc/net/wireless", "r"))) {
 568                 fprintf(stderr, "Error opening wireless file.\n");
 569                 return smprintf(unknowntext);
 570         }
 571
 572         strlcpy(needle, wificard, sizeof(needle));
 573         strlcat(needle, ":", sizeof(needle));
 574         fgets(buf, bufsize, fp);
 575         fgets(buf, bufsize, fp);
 576         fgets(buf, bufsize, fp);
 577         if ((datastart = strstr(buf, needle)) != NULL) {
 578                 datastart = strstr(buf, ":");
 579                 sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &strength);
 580         }
 581
 582         fclose(fp);
 583         return smprintf("%d%%", strength);
 584 }
 585
 586 char *
 587 wifi_essid(const char *wificard)
 588 {
 589         char id[IW_ESSID_MAX_SIZE+1];
 590         int sockfd;
 591         struct iwreq wreq;
 592
 593         memset(&wreq, 0, sizeof(struct iwreq));
 594         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 595         sprintf(wreq.ifr_name, wificard);
 596         if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
 597                 fprintf(stderr, "Cannot open socket for interface: %s\n", wificard);
 598                 return smprintf(unknowntext);
 599         }
 600         wreq.u.essid.pointer = id;
 601         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 602                 fprintf(stderr, "Get ESSID ioctl failed for interface %s\n", wificard);
 603                 return smprintf(unknowntext);
 604         }
 605
 606         if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
 607                 return smprintf(unknowntext);
 608         else
 609                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 610 }
 611
 612 int
 613 main(void)
 614 {
 615         char status_string[1024];
 616         struct arg argument;
 617
 618         if (!(dpy = XOpenDisplay(0x0))) {
 619                 fprintf(stderr, "Cannot open display!\n");
 620                 exit(1);
 621         }
 622
 623         for (;;) {
 624                 memset(status_string, 0, sizeof(status_string));
 625                 for (size_t i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 626                         argument = args[i];
 627                         char *res = argument.func(argument.args);
 628                         char *element = smprintf(argument.format, res);
 629                         if (element == NULL) {
 630                                 element = smprintf(unknowntext);
 631                                 fprintf(stderr, "Failed to format output.\n");
 632                         }
 633                         strlcat(status_string, element, sizeof(status_string));
 634                         free(res);
 635                         free(element);
 636                 }
 637
 638                 setstatus(status_string);
 639                 sleep(update_interval -1);
 640         }
 641
 642         XCloseDisplay(dpy);
 643         return 0;
 644 }