slstatus.c

   1 /* See LICENSE file for copyright and license details. */
   2
   3 /* global libraries */
   4 #include <alsa/asoundlib.h>
   5 #include <arpa/inet.h>
   6 #include <fcntl.h>
   7 #include <ifaddrs.h>
   8 #include <limits.h>
   9 #include <locale.h>
  10 #include <netdb.h>
  11 #include <stdarg.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <sys/types.h>
  16 #include <sys/stat.h>
  17 #include <sys/statvfs.h>
  18 #include <sys/socket.h>
  19 #include <time.h>
  20 #include <unistd.h>
  21 #include <X11/Xlib.h>
  22
  23 /* local headers */
  24 #include "slstatus.h"
  25 #include "config.h"
  26
  27 /* set statusbar */
  28 void
  29 setstatus(const char *str)
  30 {
  31     /* set WM_NAME via X11 */
  32     XStoreName(dpy, DefaultRootWindow(dpy), str);
  33     XSync(dpy, False);
  34 }
  35
  36 /* smprintf function */
  37 char *
  38 smprintf(const char *fmt, ...)
  39 {
  40     va_list fmtargs;
  41     char *ret = NULL;
  42
  43     va_start(fmtargs, fmt);
  44     if (vasprintf(&ret, fmt, fmtargs) < 0)
  45         return NULL;
  46     va_end(fmtargs);
  47
  48     return ret;
  49 }
  50
  51 /* battery percentage */
  52 char *
  53 battery_perc(const char *battery)
  54 {
  55     int now, full, perc;
  56     char batterynowfile[64] = "";
  57     char batteryfullfile[64] = "";
  58     FILE *fp;
  59
  60     /* generate battery nowfile path */
  61     strcat(batterynowfile, batterypath);
  62     strcat(batterynowfile, battery);
  63     strcat(batterynowfile, "/");
  64     strcat(batterynowfile, batterynow);
  65
  66     /* generate battery fullfile path */
  67     strcat(batteryfullfile, batterypath);
  68     strcat(batteryfullfile, battery);
  69     strcat(batteryfullfile, "/");
  70     strcat(batteryfullfile, batteryfull);
  71
  72     /* open battery now file */
  73     if (!(fp = fopen(batterynowfile, "r"))) {
  74         fprintf(stderr, "Error opening battery file.%s",batterynowfile);
  75         return smprintf("n/a");
  76     }
  77
  78     /* read value */
  79     fscanf(fp, "%i", &now);
  80
  81     /* close battery now file */
  82     fclose(fp);
  83
  84     /* open battery full file */
  85     if (!(fp = fopen(batteryfullfile, "r"))) {
  86         fprintf(stderr, "Error opening battery file.");
  87         return smprintf("n/a");
  88     }
  89
  90     /* read value */
  91     fscanf(fp, "%i", &full);
  92
  93     /* close battery full file */
  94     fclose(fp);
  95
  96     /* calculate percent */
  97     perc = now / (full / 100);
  98
  99     /* return perc as string */
 100     return smprintf("%d%%", perc);
 101 }
 102
 103 /* cpu percentage */
 104 char *
 105 cpu_perc(const char *null)
 106 {
 107     int perc;
 108     long double a[4], b[4];
 109     FILE *fp;
 110
 111     /* open stat file */
 112     if (!(fp = fopen("/proc/stat","r"))) {
 113         fprintf(stderr, "Error opening stat file.");
 114         return smprintf("n/a");
 115     }
 116
 117     /* read values */
 118     fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
 119
 120     /* close stat file */
 121     fclose(fp);
 122
 123     /* wait a second (for avg values) */
 124     sleep(1);
 125
 126     /* open stat file */
 127     if (!(fp = fopen("/proc/stat","r"))) {
 128         fprintf(stderr, "Error opening stat file.");
 129         return smprintf("n/a");
 130     }
 131
 132     /* read values */
 133     fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
 134
 135     /* close stat file */
 136     fclose(fp);
 137
 138     /* calculate avg in this second */
 139     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]));
 140
 141     /* return perc as string */
 142     return smprintf("%d%%", perc);
 143 }
 144
 145 /* date and time */
 146 char *
 147 datetime(const char *timeformat)
 148 {
 149     time_t tm;
 150     size_t bufsize = 64;
 151     char *buf = malloc(bufsize);
 152
 153     /* get time in format */
 154     time(&tm);
 155     setlocale(LC_TIME, "");
 156     if(!strftime(buf, bufsize, timeformat, localtime(&tm))) {
 157         setlocale(LC_TIME, "C");
 158         fprintf(stderr, "Strftime failed.\n");
 159         return smprintf("n/a");
 160     }
 161
 162     setlocale(LC_TIME, "C");
 163     /* return time */
 164     char *ret = smprintf("%s", buf);
 165     free(buf);
 166     return ret;
 167 }
 168
 169 /* disk usage percentage */
 170 char *
 171 disk_perc(const char *mountpoint)
 172 {
 173     int perc = 0;
 174     struct statvfs fs;
 175
 176     /* try to open mountpoint */
 177     if (statvfs(mountpoint, &fs) < 0) {
 178         fprintf(stderr, "Could not get filesystem info.\n");
 179         return smprintf("n/a");
 180     }
 181
 182     /* calculate percent */
 183     perc = 100 * (1.0f - ((float)fs.f_bavail / (float)fs.f_blocks));
 184
 185     /* return perc */
 186     return smprintf("%d%%", perc);
 187 }
 188
 189 /* entropy available */
 190 char *
 191 entropy(const char *null)
 192 {
 193     int entropy = 0;
 194     FILE *fp;
 195
 196     /* open entropy file */
 197     if (!(fp = fopen("/proc/sys/kernel/random/entropy_avail", "r"))) {
 198         fprintf(stderr, "Could not open entropy file.\n");
 199         return smprintf("n/a");
 200     }
 201
 202     /* extract entropy */
 203     fscanf(fp, "%d", &entropy);
 204
 205     /* close entropy file */
 206     fclose(fp);
 207
 208     /* return entropy */
 209     return smprintf("%d", entropy);
 210 }
 211
 212 /* hostname */
 213 char *
 214 hostname(const char *null)
 215 {
 216     char hostname[HOST_NAME_MAX];
 217     FILE *fp;
 218
 219     /* open hostname file */
 220     if (!(fp = fopen("/proc/sys/kernel/hostname", "r"))) {
 221         fprintf(stderr, "Could not open hostname file.\n");
 222         return smprintf("n/a");
 223     }
 224
 225     /* extract hostname */
 226     fscanf(fp, "%s\n", hostname);
 227
 228     /* close hostname file */
 229     fclose(fp);
 230
 231     /* return entropy */
 232     return smprintf("%s", hostname);
 233 }
 234
 235 /* ip address */
 236 char *
 237 ip(const char *interface)
 238 {
 239     struct ifaddrs *ifaddr, *ifa;
 240     int s;
 241     char host[NI_MAXHOST];
 242
 243     /* check if getting ip address works */
 244     if (getifaddrs(&ifaddr) == -1)
 245     {
 246         fprintf(stderr, "Error getting IP address.");
 247         return smprintf("n/a");
 248     }
 249
 250     /* get the ip address */
 251     for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next)
 252     {
 253         if (ifa->ifa_addr == NULL)
 254             continue;
 255
 256         s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
 257
 258         if ((strcmp(ifa->ifa_name, interface) == 0) && (ifa->ifa_addr->sa_family == AF_INET))
 259         {
 260             if (s != 0)
 261             {
 262                 fprintf(stderr, "Error getting IP address.");
 263                 return smprintf("n/a");
 264             }
 265             return smprintf("%s", host);
 266         }
 267     }
 268
 269     /* free the address */
 270     freeifaddrs(ifaddr);
 271
 272     /* return n/a if nothing works */
 273     return smprintf("n/a");
 274 }
 275
 276 /* ram free */
 277 char *
 278 ram_free(const char *null)
 279 {
 280     long free;
 281     FILE *fp;
 282
 283     /* open meminfo file */
 284     if (!(fp = fopen("/proc/meminfo", "r"))) {
 285         fprintf(stderr, "Error opening meminfo file.");
 286         return smprintf("n/a");
 287     }
 288
 289     /* read the values */
 290     fscanf(fp, "MemTotal: %*d kB\n");
 291     fscanf(fp, "MemFree: %ld kB\n", &free);
 292
 293     /* close meminfo file */
 294     fclose(fp);
 295
 296     /* return free ram as string */
 297     return smprintf("%f", (float)free / 1024 / 1024);
 298 }
 299
 300 /* ram percentage */
 301 char *
 302 ram_perc(const char *null)
 303 {
 304     int perc;
 305     long total, free, buffers, cached;
 306     FILE *fp;
 307
 308     /* open meminfo file */
 309     if (!(fp = fopen("/proc/meminfo", "r"))) {
 310         fprintf(stderr, "Error opening meminfo file.");
 311         return smprintf("n/a");
 312     }
 313
 314     /* read the values */
 315     fscanf(fp, "MemTotal: %ld kB\n", &total);
 316     fscanf(fp, "MemFree: %ld kB\n", &free);
 317     fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 318     fscanf(fp, "Cached: %ld kB\n", &cached);
 319
 320     /* close meminfo file */
 321     fclose(fp);
 322
 323     /* calculate percentage */
 324     perc = 100 * ((total - free) - (buffers + cached)) / total;
 325
 326     /* return perc as string */
 327     return smprintf("%d%%", perc);
 328 }
 329
 330 /* ram total */
 331 char *
 332 ram_total(const char *null)
 333 {
 334     long total;
 335     FILE *fp;
 336
 337     /* open meminfo file */
 338     if (!(fp = fopen("/proc/meminfo", "r"))) {
 339         fprintf(stderr, "Error opening meminfo file.");
 340         return smprintf("n/a");
 341     }
 342
 343     /* read the values */
 344     fscanf(fp, "MemTotal: %ld kB\n", &total);
 345
 346     /* close meminfo file */
 347     fclose(fp);
 348
 349     /* return total ram as string */
 350     return smprintf("%f", (float)total / 1024 / 1024);
 351 }
 352
 353 /* ram used */
 354 char *
 355 ram_used(const char *null)
 356 {
 357     long free, total, buffers, cached, used;
 358     FILE *fp;
 359
 360     /* open meminfo file */
 361     if (!(fp = fopen("/proc/meminfo", "r"))) {
 362         fprintf(stderr, "Error opening meminfo file.");
 363         return smprintf("n/a");
 364     }
 365
 366     /* read the values */
 367     fscanf(fp, "MemTotal: %ld kB\n", &total);
 368     fscanf(fp, "MemFree: %ld kB\n", &free);
 369     fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 370     fscanf(fp, "Cached: %ld kB\n", &cached);
 371
 372     /* close meminfo file */
 373     fclose(fp);
 374
 375     /* calculate used */
 376     used = total - free - buffers - cached;
 377
 378     /* return used ram as string */
 379     return smprintf("%f", (float)used / 1024 / 1024);
 380 }
 381
 382 /* temperature */
 383 char *
 384 temp(const char *file)
 385 {
 386     int temperature;
 387     FILE *fp;
 388
 389     /* open temperature file */
 390     if (!(fp = fopen(file, "r"))) {
 391         fprintf(stderr, "Could not open temperature file.\n");
 392         return smprintf("n/a");
 393     }
 394
 395     /* extract temperature */
 396     fscanf(fp, "%d", &temperature);
 397
 398     /* close temperature file */
 399     fclose(fp);
 400
 401     /* return temperature in degrees */
 402     return smprintf("%d°C", temperature / 1000);
 403 }
 404
 405 /* alsa volume percentage */
 406 char *
 407 vol_perc(const char *soundcard)
 408 {
 409     int mute = 0;
 410     long vol = 0, max = 0, min = 0;
 411
 412     /* get volume from alsa */
 413     snd_mixer_t *handle;
 414     snd_mixer_elem_t *pcm_mixer, *mas_mixer;
 415     snd_mixer_selem_id_t *vol_info, *mute_info;
 416     snd_mixer_open(&handle, 0);
 417     snd_mixer_attach(handle, soundcard);
 418     snd_mixer_selem_register(handle, NULL, NULL);
 419     snd_mixer_load(handle);
 420     snd_mixer_selem_id_malloc(&vol_info);
 421     snd_mixer_selem_id_malloc(&mute_info);
 422     snd_mixer_selem_id_set_name(vol_info, channel);
 423     snd_mixer_selem_id_set_name(mute_info, channel);
 424     pcm_mixer = snd_mixer_find_selem(handle, vol_info);
 425     mas_mixer = snd_mixer_find_selem(handle, mute_info);
 426     snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, &min, &max);
 427     snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, SND_MIXER_SCHN_MONO, &vol);
 428     snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO, &mute);
 429     if (vol_info)
 430         snd_mixer_selem_id_free(vol_info);
 431     if (mute_info)
 432         snd_mixer_selem_id_free(mute_info);
 433     if (handle)
 434         snd_mixer_close(handle);
 435
 436     /* return the string (mute) */
 437     if (!mute)
 438         return smprintf("mute");
 439     else
 440         return smprintf("%d%%", (vol * 100) / max);
 441 }
 442
 443 /* wifi percentage */
 444 char *
 445 wifi_perc(const char *wificard)
 446 {
 447     int bufsize = 255;
 448     int strength;
 449     char buf[bufsize];
 450     char *datastart;
 451     char path[64];
 452     char status[5];
 453     char needle[sizeof wificard + 1];
 454     FILE *fp;
 455
 456     /* generate the path name */
 457     memset(path, 0, sizeof path);
 458     strcat(path, "/sys/class/net/");
 459     strcat(path, wificard);
 460     strcat(path, "/operstate");
 461
 462     /* open wifi file */
 463     if(!(fp = fopen(path, "r"))) {
 464         fprintf(stderr, "Error opening wifi operstate file.");
 465         return smprintf("n/a");
 466     }
 467
 468     /* read the status */
 469     fgets(status, 5, fp);
 470
 471     /* close wifi file */
 472     fclose(fp);
 473
 474     /* check if interface down */
 475     if(strcmp(status, "up\n") != 0){
 476         return smprintf("n/a");
 477     }
 478
 479     /* open wifi file */
 480     if (!(fp = fopen("/proc/net/wireless", "r"))) {
 481         fprintf(stderr, "Error opening wireless file.");
 482         return smprintf("n/a");
 483     }
 484
 485     /* extract the signal strength */
 486     strcpy(needle, wificard);
 487     strcat(needle, ":");
 488     fgets(buf, bufsize, fp);
 489     fgets(buf, bufsize, fp);
 490     fgets(buf, bufsize, fp);
 491     if ((datastart = strstr(buf, needle)) != NULL) {
 492         datastart = strstr(buf, ":");
 493         sscanf(datastart + 1, " %*d   %d  %*d  %*d        %*d      %*d      %*d      %*d      %*d        %*d", &strength);
 494     }
 495
 496     /* close wifi file */
 497     fclose(fp);
 498
 499     /* return strength in percent */
 500     return smprintf("%d%%", strength);
 501 }
 502
 503 /* main function */
 504 int
 505 main()
 506 {
 507     char status_string[1024];
 508     struct arg argument;
 509
 510     /* try to open display */
 511     if (!(dpy = XOpenDisplay(0x0))) {
 512         fprintf(stderr, "Cannot open display!\n");
 513         exit(1);
 514     }
 515
 516     /* return status every interval */
 517     for (;;) {
 518         /* clear the string */
 519         memset(status_string, 0, sizeof(status_string));
 520
 521         /* generate status_string */
 522         for (size_t i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 523             argument = args[i];
 524             char *res = argument.func(argument.args);
 525             char *element = smprintf(argument.format, res);
 526             strcat(status_string, element);
 527             free(res);
 528             free(element);
 529         }
 530
 531         /* return the statusbar */
 532         setstatus(status_string);
 533
 534         /* wait, "update_interval - 1" because of get_cpu_usage() which uses 1 second */
 535         sleep(update_interval -1);
 536     }
 537
 538     /* close display */
 539     XCloseDisplay(dpy);
 540
 541     /* exit successfully */
 542     return 0;
 543 }