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 <linux/wireless.h>
  10 #include <locale.h>
  11 #include <netdb.h>
  12 #include <pwd.h>
  13 #include <stdarg.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17 #include <sys/ioctl.h>
  18 #include <sys/stat.h>
  19 #include <sys/statvfs.h>
  20 #include <sys/socket.h>
  21 #include <sys/types.h>
  22 #include <time.h>
  23 #include <unistd.h>
  24 #include <X11/Xlib.h>
  25
  26 /* local headers */
  27 #include "slstatus.h"
  28 #include "config.h"
  29
  30 /* set statusbar */
  31 void
  32 setstatus(const char *str)
  33 {
  34         /* set WM_NAME via X11 */
  35         XStoreName(dpy, DefaultRootWindow(dpy), str);
  36         XSync(dpy, False);
  37 }
  38
  39 /* smprintf function */
  40 char *
  41 smprintf(const char *fmt, ...)
  42 {
  43         va_list fmtargs;
  44         char *ret = NULL;
  45
  46         va_start(fmtargs, fmt);
  47         if (vasprintf(&ret, fmt, fmtargs) < 0) {
  48                 return NULL;
  49         }
  50         va_end(fmtargs);
  51
  52         return ret;
  53 }
  54
  55 /* battery percentage */
  56 char *
  57 battery_perc(const char *battery)
  58 {
  59         int now, full, perc;
  60         char batterynowfile[64] = "";
  61         char batteryfullfile[64] = "";
  62         FILE *fp;
  63
  64         /* generate battery nowfile path */
  65         strcat(batterynowfile, batterypath);
  66         strcat(batterynowfile, battery);
  67         strcat(batterynowfile, "/");
  68         strcat(batterynowfile, batterynow);
  69
  70         /* generate battery fullfile path */
  71         strcat(batteryfullfile, batterypath);
  72         strcat(batteryfullfile, battery);
  73         strcat(batteryfullfile, "/");
  74         strcat(batteryfullfile, batteryfull);
  75
  76         /* open battery now file */
  77         if (!(fp = fopen(batterynowfile, "r"))) {
  78                 fprintf(stderr, "Error opening battery file: %s.\n", batterynowfile);
  79                 return smprintf("n/a");
  80         }
  81
  82         /* read value */
  83         fscanf(fp, "%i", &now);
  84
  85         /* close battery now file */
  86         fclose(fp);
  87
  88         /* open battery full file */
  89         if (!(fp = fopen(batteryfullfile, "r"))) {
  90                 fprintf(stderr, "Error opening battery file.\n");
  91                 return smprintf("n/a");
  92         }
  93
  94         /* read value */
  95         fscanf(fp, "%i", &full);
  96
  97         /* close battery full file */
  98         fclose(fp);
  99
 100         /* calculate percent */
 101         perc = now / (full / 100);
 102
 103         /* return perc as string */
 104         return smprintf("%d%%", perc);
 105 }
 106
 107 /* cpu percentage */
 108 char *
 109 cpu_perc(const char *null)
 110 {
 111         int perc;
 112         long double a[4], b[4];
 113         FILE *fp;
 114
 115         /* open stat file */
 116         if (!(fp = fopen("/proc/stat","r"))) {
 117                 fprintf(stderr, "Error opening stat file.\n");
 118                 return smprintf("n/a");
 119         }
 120
 121         /* read values */
 122         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
 123
 124         /* close stat file */
 125         fclose(fp);
 126
 127         /* wait a second (for avg values) */
 128         sleep(1);
 129
 130         /* open stat file */
 131         if (!(fp = fopen("/proc/stat","r"))) {
 132                 fprintf(stderr, "Error opening stat file.\n");
 133                 return smprintf("n/a");
 134         }
 135
 136         /* read values */
 137         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
 138
 139         /* close stat file */
 140         fclose(fp);
 141
 142         /* calculate avg in this second */
 143         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]));
 144
 145         /* return perc as string */
 146         return smprintf("%d%%", perc);
 147 }
 148
 149 /* date and time */
 150 char *
 151 datetime(const char *timeformat)
 152 {
 153         time_t tm;
 154         size_t bufsize = 64;
 155         char *buf = malloc(bufsize);
 156         if (buf == NULL) {
 157                 fprintf(stderr, "Failed to get date/time.\n");
 158                 return smprintf("n/a");
 159         }
 160
 161         /* get time in format */
 162         time(&tm);
 163         setlocale(LC_TIME, "");
 164         if (!strftime(buf, bufsize, timeformat, localtime(&tm))) {
 165                 setlocale(LC_TIME, "C");
 166                 free(buf);
 167                 fprintf(stderr, "Strftime failed.\n");
 168                 return smprintf("n/a");
 169         }
 170
 171         setlocale(LC_TIME, "C");
 172         /* return time */
 173         char *ret = smprintf("%s", buf);
 174         free(buf);
 175         return ret;
 176 }
 177
 178 /* disk free */
 179 char *
 180 disk_free(const char *mountpoint)
 181 {
 182         struct statvfs fs;
 183
 184         /* try to open mountpoint */
 185         if (statvfs(mountpoint, &fs) < 0) {
 186                 fprintf(stderr, "Could not get filesystem info.\n");
 187                 return smprintf("n/a");
 188         }
 189
 190         /* return free */
 191         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
 192 }
 193
 194 /* disk usage percentage */
 195 char *
 196 disk_perc(const char *mountpoint)
 197 {
 198         int perc = 0;
 199         struct statvfs fs;
 200
 201         /* try to open mountpoint */
 202         if (statvfs(mountpoint, &fs) < 0) {
 203                 fprintf(stderr, "Could not get filesystem info.\n");
 204                 return smprintf("n/a");
 205         }
 206
 207         /* calculate percent */
 208         perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
 209
 210         /* return perc */
 211         return smprintf("%d%%", perc);
 212 }
 213
 214 /* disk total */
 215 char *
 216 disk_total(const char *mountpoint)
 217 {
 218         struct statvfs fs;
 219
 220         /* try to open mountpoint */
 221         if (statvfs(mountpoint, &fs) < 0) {
 222                 fprintf(stderr, "Could not get filesystem info.\n");
 223                 return smprintf("n/a");
 224         }
 225
 226         /* return total */
 227         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
 228 }
 229
 230 /* disk used */
 231 char *
 232 disk_used(const char *mountpoint)
 233 {
 234         struct statvfs fs;
 235
 236         /* try to open mountpoint */
 237         if (statvfs(mountpoint, &fs) < 0) {
 238                 fprintf(stderr, "Could not get filesystem info.\n");
 239                 return smprintf("n/a");
 240         }
 241
 242         /* return used */
 243         return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
 244 }
 245
 246 /* entropy available */
 247 char *
 248 entropy(const char *null)
 249 {
 250         int entropy = 0;
 251         FILE *fp;
 252
 253         /* open entropy file */
 254         if (!(fp = fopen("/proc/sys/kernel/random/entropy_avail", "r"))) {
 255                 fprintf(stderr, "Could not open entropy file.\n");
 256                 return smprintf("n/a");
 257         }
 258
 259         /* extract entropy */
 260         fscanf(fp, "%d", &entropy);
 261
 262         /* close entropy file */
 263         fclose(fp);
 264
 265         /* return entropy */
 266         return smprintf("%d", entropy);
 267 }
 268
 269 /* gid */
 270 char *
 271 gid(const char *null)
 272 {
 273         gid_t gid;
 274
 275         if ((gid = getgid()) < 0) {
 276                 fprintf(stderr, "Could no get gid.\n");
 277                 return smprintf("n/a");
 278         } else {
 279                 return smprintf("%d", gid);
 280         }
 281
 282         return smprintf("n/a");
 283 }
 284
 285 /* hostname */
 286 char *
 287 hostname(const char *null)
 288 {
 289         char hostname[HOST_NAME_MAX];
 290         FILE *fp;
 291
 292         /* open hostname file */
 293         if (!(fp = fopen("/proc/sys/kernel/hostname", "r"))) {
 294                 fprintf(stderr, "Could not open hostname file.\n");
 295                 return smprintf("n/a");
 296         }
 297
 298         /* extract hostname */
 299         fscanf(fp, "%s\n", hostname);
 300
 301         /* close hostname file */
 302         fclose(fp);
 303
 304         /* return entropy */
 305         return smprintf("%s", hostname);
 306 }
 307
 308 /* ip address */
 309 char *
 310 ip(const char *interface)
 311 {
 312         struct ifaddrs *ifaddr, *ifa;
 313         int s;
 314         char host[NI_MAXHOST];
 315
 316         /* check if getting ip address works */
 317         if (getifaddrs(&ifaddr) == -1) {
 318                 fprintf(stderr, "Error getting IP address.\n");
 319                 return smprintf("n/a");
 320         }
 321
 322         /* get the ip address */
 323         for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
 324                 if (ifa->ifa_addr == NULL) {
 325                         continue;
 326                 }
 327
 328                 s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
 329
 330                 if ((strcmp(ifa->ifa_name, interface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
 331                         if (s != 0) {
 332                                 fprintf(stderr, "Error getting IP address.\n");
 333                                 return smprintf("n/a");
 334                         }
 335                         return smprintf("%s", host);
 336                 }
 337         }
 338
 339         /* free the address */
 340         freeifaddrs(ifaddr);
 341
 342         /* return n/a if nothing works */
 343         return smprintf("n/a");
 344 }
 345
 346 /* ram free */
 347 char *
 348 ram_free(const char *null)
 349 {
 350         long free;
 351         FILE *fp;
 352
 353         /* open meminfo file */
 354         if (!(fp = fopen("/proc/meminfo", "r"))) {
 355                 fprintf(stderr, "Error opening meminfo file.\n");
 356                 return smprintf("n/a");
 357         }
 358
 359         /* read the values */
 360         fscanf(fp, "MemFree: %ld kB\n", &free);
 361
 362         /* close meminfo file */
 363         fclose(fp);
 364
 365         /* return free ram as string */
 366         return smprintf("%f", (float)free / 1024 / 1024);
 367 }
 368
 369 /* ram percentage */
 370 char *
 371 ram_perc(const char *null)
 372 {
 373         int perc;
 374         long total, free, buffers, cached;
 375         FILE *fp;
 376
 377         /* open meminfo file */
 378         if (!(fp = fopen("/proc/meminfo", "r"))) {
 379                 fprintf(stderr, "Error opening meminfo file.\n");
 380                 return smprintf("n/a");
 381         }
 382
 383         /* read the values */
 384         fscanf(fp, "MemTotal: %ld kB\n", &total);
 385         fscanf(fp, "MemFree: %ld kB\n", &free);
 386         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 387         fscanf(fp, "Cached: %ld kB\n", &cached);
 388
 389         /* close meminfo file */
 390         fclose(fp);
 391
 392         /* calculate percentage */
 393         perc = 100 * ((total - free) - (buffers + cached)) / total;
 394
 395         /* return perc as string */
 396         return smprintf("%d%%", perc);
 397 }
 398
 399 /* ram total */
 400 char *
 401 ram_total(const char *null)
 402 {
 403         long total;
 404         FILE *fp;
 405
 406         /* open meminfo file */
 407         if (!(fp = fopen("/proc/meminfo", "r"))) {
 408                 fprintf(stderr, "Error opening meminfo file.\n");
 409                 return smprintf("n/a");
 410         }
 411
 412         /* read the values */
 413         fscanf(fp, "MemTotal: %ld kB\n", &total);
 414
 415         /* close meminfo file */
 416         fclose(fp);
 417
 418         /* return total ram as string */
 419         return smprintf("%f", (float)total / 1024 / 1024);
 420 }
 421
 422 /* ram used */
 423 char *
 424 ram_used(const char *null)
 425 {
 426         long free, total, buffers, cached, used;
 427         FILE *fp;
 428
 429         /* open meminfo file */
 430         if (!(fp = fopen("/proc/meminfo", "r"))) {
 431                 fprintf(stderr, "Error opening meminfo file.\n");
 432                 return smprintf("n/a");
 433         }
 434
 435         /* read the values */
 436         fscanf(fp, "MemTotal: %ld kB\n", &total);
 437         fscanf(fp, "MemFree: %ld kB\n", &free);
 438         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 439         fscanf(fp, "Cached: %ld kB\n", &cached);
 440
 441         /* close meminfo file */
 442         fclose(fp);
 443
 444         /* calculate used */
 445         used = total - free - buffers - cached;
 446
 447         /* return used ram as string */
 448         return smprintf("%f", (float)used / 1024 / 1024);
 449 }
 450
 451 /* custom shell command */
 452 char *
 453 run_command(const char* command)
 454 {
 455         int good;
 456         FILE *fp;
 457         char buffer[64];
 458
 459         /* try to open the command output */
 460         if (!(fp = popen(command, "r"))) {
 461                 fprintf(stderr, "Could not get command output for: %s.\n", command);
 462                 return smprintf("n/a");
 463         }
 464
 465         /* get command output text, save it to buffer */
 466         fgets(buffer, sizeof(buffer) - 1, fp);
 467
 468         /* close it again */
 469         pclose(fp);
 470
 471         /* add nullchar at the end */
 472         for (int i = 0 ; i != sizeof(buffer); i++) {
 473                 if (buffer[i] == '\0') {
 474                         good = 1;
 475                         break;
 476                 }
 477         }
 478         if (good) {
 479                 buffer[strlen(buffer) - 1] = '\0';
 480         }
 481
 482         /* return the output */
 483         return smprintf("%s", buffer);
 484 }
 485
 486 /* temperature */
 487 char *
 488 temp(const char *file)
 489 {
 490         int temperature;
 491         FILE *fp;
 492
 493         /* open temperature file */
 494         if (!(fp = fopen(file, "r"))) {
 495                 fprintf(stderr, "Could not open temperature file.\n");
 496                 return smprintf("n/a");
 497         }
 498
 499         /* extract temperature */
 500         fscanf(fp, "%d", &temperature);
 501
 502         /* close temperature file */
 503         fclose(fp);
 504
 505         /* return temperature in degrees */
 506         return smprintf("%d°C", temperature / 1000);
 507 }
 508
 509 /* username */
 510 char *
 511 username(const char *null)
 512 {
 513         register struct passwd *pw;
 514         register uid_t uid;
 515
 516         /* get the values */
 517         uid = geteuid();
 518         pw = getpwuid(uid);
 519
 520         /* if it worked, return */
 521         if (pw) {
 522                 return smprintf("%s", pw->pw_name);
 523         } else {
 524                 fprintf(stderr, "Could not get username.\n");
 525                 return smprintf("n/a");
 526         }
 527
 528         return smprintf("n/a");
 529 }
 530
 531 /* uid */
 532 char *
 533 uid(const char *null)
 534 {
 535         register uid_t uid;
 536
 537         /* get the values */
 538         uid = geteuid();
 539
 540         /* if it worked, return */
 541         if (uid) {
 542                 return smprintf("%d", uid);
 543         } else {
 544                 fprintf(stderr, "Could not get uid.\n");
 545                 return smprintf("n/a");
 546         }
 547
 548         return smprintf("n/a");
 549 }
 550
 551
 552 /* alsa volume percentage */
 553 char *
 554 vol_perc(const char *soundcard)
 555 {
 556         int mute = 0;
 557         long vol = 0, max = 0, min = 0;
 558         snd_mixer_t *handle;
 559         snd_mixer_elem_t *pcm_mixer, *mas_mixer;
 560         snd_mixer_selem_id_t *vol_info, *mute_info;
 561
 562         /* open everything */
 563         snd_mixer_open(&handle, 0);
 564         snd_mixer_attach(handle, soundcard);
 565         snd_mixer_selem_register(handle, NULL, NULL);
 566         snd_mixer_load(handle);
 567
 568         /* prepare everything */
 569         snd_mixer_selem_id_malloc(&vol_info);
 570         snd_mixer_selem_id_malloc(&mute_info);
 571         /* check */
 572         if (vol_info == NULL || mute_info == NULL) {
 573                 fprintf(stderr, "Could not get alsa volume.\n");
 574                 return smprintf("n/a");
 575         }
 576         snd_mixer_selem_id_set_name(vol_info, channel);
 577         snd_mixer_selem_id_set_name(mute_info, channel);
 578         pcm_mixer = snd_mixer_find_selem(handle, vol_info);
 579         mas_mixer = snd_mixer_find_selem(handle, mute_info);
 580
 581         /* get the info */
 582         snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, &min, &max);
 583         snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, SND_MIXER_SCHN_MONO, &vol);
 584         snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO, &mute);
 585
 586         /* clean up */
 587         if (vol_info) {
 588                 snd_mixer_selem_id_free(vol_info);
 589         }
 590         if (mute_info) {
 591                 snd_mixer_selem_id_free(mute_info);
 592         }
 593         if (handle) {
 594                 snd_mixer_close(handle);
 595         }
 596
 597         /* return the string (mute) */
 598         if (!mute) {
 599                 return smprintf("mute");
 600         } else {
 601                 return smprintf("%d%%", (vol * 100) / max);
 602         }
 603 }
 604
 605 /* wifi percentage */
 606 char *
 607 wifi_perc(const char *wificard)
 608 {
 609         int bufsize = 255;
 610         int strength;
 611         char buf[bufsize];
 612         char *datastart;
 613         char path[64];
 614         char status[5];
 615         char needle[sizeof wificard + 1];
 616         FILE *fp;
 617
 618         /* generate the path name */
 619         memset(path, 0, sizeof path);
 620         strcat(path, "/sys/class/net/");
 621         strcat(path, wificard);
 622         strcat(path, "/operstate");
 623
 624         /* open wifi file */
 625         if(!(fp = fopen(path, "r"))) {
 626                 fprintf(stderr, "Error opening wifi operstate file.\n");
 627                 return smprintf("n/a");
 628         }
 629
 630         /* read the status */
 631         fgets(status, 5, fp);
 632
 633         /* close wifi file */
 634         fclose(fp);
 635
 636         /* check if interface down */
 637         if(strcmp(status, "up\n") != 0) {
 638                 return smprintf("n/a");
 639         }
 640
 641         /* open wifi file */
 642         if (!(fp = fopen("/proc/net/wireless", "r"))) {
 643                 fprintf(stderr, "Error opening wireless file.\n");
 644                 return smprintf("n/a");
 645         }
 646
 647         /* extract the signal strength */
 648         strcpy(needle, wificard);
 649         strcat(needle, ":");
 650         fgets(buf, bufsize, fp);
 651         fgets(buf, bufsize, fp);
 652         fgets(buf, bufsize, fp);
 653         if ((datastart = strstr(buf, needle)) != NULL) {
 654                 datastart = strstr(buf, ":");
 655                 sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &strength);
 656         }
 657
 658         /* close wifi file */
 659         fclose(fp);
 660
 661         /* return strength in percent */
 662         return smprintf("%d%%", strength);
 663 }
 664
 665 /* wifi essid */
 666 char *
 667 wifi_essid(const char *wificard)
 668 {
 669         char id[IW_ESSID_MAX_SIZE+1];
 670         int sockfd;
 671         struct iwreq wreq;
 672
 673         /* prepare */
 674         memset(&wreq, 0, sizeof(struct iwreq));
 675         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 676
 677         /* set the interface */
 678         sprintf(wreq.ifr_name, wificard);
 679
 680         /* check */
 681         if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
 682                 fprintf(stderr, "Cannot open socket for interface: %s\n", wificard);
 683                 return smprintf("n/a");
 684         }
 685         wreq.u.essid.pointer = id;
 686         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 687                 fprintf(stderr, "Get ESSID ioctl failed for interface %s\n", wificard);
 688                 return smprintf("n/a");
 689         }
 690
 691         /* return the essid */
 692         if (strcmp((char *)wreq.u.essid.pointer, "") == 0) {
 693                 return smprintf("n/a");
 694         } else {
 695                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 696         }
 697 }
 698
 699 /* main function */
 700 int
 701 main(void)
 702 {
 703         char status_string[1024];
 704         struct arg argument;
 705
 706         /* try to open display */
 707         if (!(dpy = XOpenDisplay(0x0))) {
 708                 fprintf(stderr, "Cannot open display!\n");
 709                 exit(1);
 710         }
 711
 712         /* return status every interval */
 713         for (;;) {
 714                 /* clear the string */
 715                 memset(status_string, 0, sizeof(status_string));
 716
 717                 /* generate status_string */
 718                 for (size_t i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 719                         argument = args[i];
 720                         char *res = argument.func(argument.args);
 721                         char *element = smprintf(argument.format, res);
 722                         if (element == NULL) {
 723                                 element = smprintf("n/a");
 724                                 fprintf(stderr, "Failed to format output.\n");
 725                         }
 726                         strcat(status_string, element);
 727                         free(res);
 728                         free(element);
 729                 }
 730
 731                 /* return the statusbar */
 732                 setstatus(status_string);
 733
 734                 /* wait, "update_interval - 1" because of get_cpu_usage() which uses 1 second */
 735                 sleep(update_interval -1);
 736         }
 737
 738         /* close display */
 739         XCloseDisplay(dpy);
 740
 741         /* exit successfully */
 742         return 0;
 743 }