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(unknowntext);
  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(unknowntext);
  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(unknowntext);
 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(unknowntext);
 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(unknowntext);
 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(unknowntext);
 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(unknowntext);
 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(unknowntext);
 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(unknowntext);
 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(unknowntext);
 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(unknowntext);
 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(unknowntext);
 278         } else {
 279                 return smprintf("%d", gid);
 280         }
 281
 282         return smprintf(unknowntext);
 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(unknowntext);
 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(unknowntext);
 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(unknowntext);
 334                         }
 335                         return smprintf("%s", host);
 336                 }
 337         }
 338
 339         /* free the address */
 340         freeifaddrs(ifaddr);
 341
 342         return smprintf(unknowntext);
 343 }
 344
 345 /* ram free */
 346 char *
 347 ram_free(const char *null)
 348 {
 349         long free;
 350         FILE *fp;
 351
 352         /* open meminfo file */
 353         if (!(fp = fopen("/proc/meminfo", "r"))) {
 354                 fprintf(stderr, "Error opening meminfo file.\n");
 355                 return smprintf(unknowntext);
 356         }
 357
 358         /* read the values */
 359         fscanf(fp, "MemFree: %ld kB\n", &free);
 360
 361         /* close meminfo file */
 362         fclose(fp);
 363
 364         /* return free ram as string */
 365         return smprintf("%f", (float)free / 1024 / 1024);
 366 }
 367
 368 /* ram percentage */
 369 char *
 370 ram_perc(const char *null)
 371 {
 372         int perc;
 373         long total, free, buffers, cached;
 374         FILE *fp;
 375
 376         /* open meminfo file */
 377         if (!(fp = fopen("/proc/meminfo", "r"))) {
 378                 fprintf(stderr, "Error opening meminfo file.\n");
 379                 return smprintf(unknowntext);
 380         }
 381
 382         /* read the values */
 383         fscanf(fp, "MemTotal: %ld kB\n", &total);
 384         fscanf(fp, "MemFree: %ld kB\n", &free);
 385         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 386         fscanf(fp, "Cached: %ld kB\n", &cached);
 387
 388         /* close meminfo file */
 389         fclose(fp);
 390
 391         /* calculate percentage */
 392         perc = 100 * ((total - free) - (buffers + cached)) / total;
 393
 394         /* return perc as string */
 395         return smprintf("%d%%", perc);
 396 }
 397
 398 /* ram total */
 399 char *
 400 ram_total(const char *null)
 401 {
 402         long total;
 403         FILE *fp;
 404
 405         /* open meminfo file */
 406         if (!(fp = fopen("/proc/meminfo", "r"))) {
 407                 fprintf(stderr, "Error opening meminfo file.\n");
 408                 return smprintf(unknowntext);
 409         }
 410
 411         /* read the values */
 412         fscanf(fp, "MemTotal: %ld kB\n", &total);
 413
 414         /* close meminfo file */
 415         fclose(fp);
 416
 417         /* return total ram as string */
 418         return smprintf("%f", (float)total / 1024 / 1024);
 419 }
 420
 421 /* ram used */
 422 char *
 423 ram_used(const char *null)
 424 {
 425         long free, total, buffers, cached, used;
 426         FILE *fp;
 427
 428         /* open meminfo file */
 429         if (!(fp = fopen("/proc/meminfo", "r"))) {
 430                 fprintf(stderr, "Error opening meminfo file.\n");
 431                 return smprintf(unknowntext);
 432         }
 433
 434         /* read the values */
 435         fscanf(fp, "MemTotal: %ld kB\n", &total);
 436         fscanf(fp, "MemFree: %ld kB\n", &free);
 437         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 438         fscanf(fp, "Cached: %ld kB\n", &cached);
 439
 440         /* close meminfo file */
 441         fclose(fp);
 442
 443         /* calculate used */
 444         used = total - free - buffers - cached;
 445
 446         /* return used ram as string */
 447         return smprintf("%f", (float)used / 1024 / 1024);
 448 }
 449
 450 /* custom shell command */
 451 char *
 452 run_command(const char* command)
 453 {
 454         int good;
 455         FILE *fp;
 456         char buffer[64];
 457
 458         /* try to open the command output */
 459         if (!(fp = popen(command, "r"))) {
 460                 fprintf(stderr, "Could not get command output for: %s.\n", command);
 461                 return smprintf(unknowntext);
 462         }
 463
 464         /* get command output text, save it to buffer */
 465         fgets(buffer, sizeof(buffer) - 1, fp);
 466
 467         /* close it again */
 468         pclose(fp);
 469
 470         /* add nullchar at the end */
 471         for (int i = 0 ; i != sizeof(buffer); i++) {
 472                 if (buffer[i] == '\0') {
 473                         good = 1;
 474                         break;
 475                 }
 476         }
 477         if (good) {
 478                 buffer[strlen(buffer) - 1] = '\0';
 479         }
 480
 481         /* return the output */
 482         return smprintf("%s", buffer);
 483 }
 484
 485 /* temperature */
 486 char *
 487 temp(const char *file)
 488 {
 489         int temperature;
 490         FILE *fp;
 491
 492         /* open temperature file */
 493         if (!(fp = fopen(file, "r"))) {
 494                 fprintf(stderr, "Could not open temperature file.\n");
 495                 return smprintf(unknowntext);
 496         }
 497
 498         /* extract temperature */
 499         fscanf(fp, "%d", &temperature);
 500
 501         /* close temperature file */
 502         fclose(fp);
 503
 504         /* return temperature in degrees */
 505         return smprintf("%d°C", temperature / 1000);
 506 }
 507
 508 /* username */
 509 char *
 510 username(const char *null)
 511 {
 512         register struct passwd *pw;
 513         register uid_t uid;
 514
 515         /* get the values */
 516         uid = geteuid();
 517         pw = getpwuid(uid);
 518
 519         /* if it worked, return */
 520         if (pw) {
 521                 return smprintf("%s", pw->pw_name);
 522         } else {
 523                 fprintf(stderr, "Could not get username.\n");
 524                 return smprintf(unknowntext);
 525         }
 526
 527         return smprintf(unknowntext);
 528 }
 529
 530 /* uid */
 531 char *
 532 uid(const char *null)
 533 {
 534         register uid_t uid;
 535
 536         /* get the values */
 537         uid = geteuid();
 538
 539         /* if it worked, return */
 540         if (uid) {
 541                 return smprintf("%d", uid);
 542         } else {
 543                 fprintf(stderr, "Could not get uid.\n");
 544                 return smprintf(unknowntext);
 545         }
 546
 547         return smprintf(unknowntext);
 548 }
 549
 550
 551 /* alsa volume percentage */
 552 char *
 553 vol_perc(const char *soundcard)
 554 {
 555         int mute = 0;
 556         long vol = 0, max = 0, min = 0;
 557         snd_mixer_t *handle;
 558         snd_mixer_elem_t *pcm_mixer, *mas_mixer;
 559         snd_mixer_selem_id_t *vol_info, *mute_info;
 560
 561         /* open everything */
 562         snd_mixer_open(&handle, 0);
 563         snd_mixer_attach(handle, soundcard);
 564         snd_mixer_selem_register(handle, NULL, NULL);
 565         snd_mixer_load(handle);
 566
 567         /* prepare everything */
 568         snd_mixer_selem_id_malloc(&vol_info);
 569         snd_mixer_selem_id_malloc(&mute_info);
 570         /* check */
 571         if (vol_info == NULL || mute_info == NULL) {
 572                 fprintf(stderr, "Could not get alsa volume.\n");
 573                 return smprintf(unknowntext);
 574         }
 575         snd_mixer_selem_id_set_name(vol_info, channel);
 576         snd_mixer_selem_id_set_name(mute_info, channel);
 577         pcm_mixer = snd_mixer_find_selem(handle, vol_info);
 578         mas_mixer = snd_mixer_find_selem(handle, mute_info);
 579
 580         /* get the info */
 581         snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, &min, &max);
 582         snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, SND_MIXER_SCHN_MONO, &vol);
 583         snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO, &mute);
 584
 585         /* clean up */
 586         if (vol_info) {
 587                 snd_mixer_selem_id_free(vol_info);
 588         }
 589         if (mute_info) {
 590                 snd_mixer_selem_id_free(mute_info);
 591         }
 592         if (handle) {
 593                 snd_mixer_close(handle);
 594         }
 595
 596         /* return the string (mute) */
 597         if (!mute) {
 598                 return smprintf("mute");
 599         } else {
 600                 return smprintf("%d%%", (vol * 100) / max);
 601         }
 602 }
 603
 604 /* wifi percentage */
 605 char *
 606 wifi_perc(const char *wificard)
 607 {
 608         int bufsize = 255;
 609         int strength;
 610         char buf[bufsize];
 611         char *datastart;
 612         char path[64];
 613         char status[5];
 614         char needle[sizeof wificard + 1];
 615         FILE *fp;
 616
 617         /* generate the path name */
 618         memset(path, 0, sizeof path);
 619         strcat(path, "/sys/class/net/");
 620         strcat(path, wificard);
 621         strcat(path, "/operstate");
 622
 623         /* open wifi file */
 624         if(!(fp = fopen(path, "r"))) {
 625                 fprintf(stderr, "Error opening wifi operstate file.\n");
 626                 return smprintf(unknowntext);
 627         }
 628
 629         /* read the status */
 630         fgets(status, 5, fp);
 631
 632         /* close wifi file */
 633         fclose(fp);
 634
 635         /* check if interface down */
 636         if(strcmp(status, "up\n") != 0) {
 637                 return smprintf(unknowntext);
 638         }
 639
 640         /* open wifi file */
 641         if (!(fp = fopen("/proc/net/wireless", "r"))) {
 642                 fprintf(stderr, "Error opening wireless file.\n");
 643                 return smprintf(unknowntext);
 644         }
 645
 646         /* extract the signal strength */
 647         strcpy(needle, wificard);
 648         strcat(needle, ":");
 649         fgets(buf, bufsize, fp);
 650         fgets(buf, bufsize, fp);
 651         fgets(buf, bufsize, fp);
 652         if ((datastart = strstr(buf, needle)) != NULL) {
 653                 datastart = strstr(buf, ":");
 654                 sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &strength);
 655         }
 656
 657         /* close wifi file */
 658         fclose(fp);
 659
 660         /* return strength in percent */
 661         return smprintf("%d%%", strength);
 662 }
 663
 664 /* wifi essid */
 665 char *
 666 wifi_essid(const char *wificard)
 667 {
 668         char id[IW_ESSID_MAX_SIZE+1];
 669         int sockfd;
 670         struct iwreq wreq;
 671
 672         /* prepare */
 673         memset(&wreq, 0, sizeof(struct iwreq));
 674         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 675
 676         /* set the interface */
 677         sprintf(wreq.ifr_name, wificard);
 678
 679         /* check */
 680         if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
 681                 fprintf(stderr, "Cannot open socket for interface: %s\n", wificard);
 682                 return smprintf(unknowntext);
 683         }
 684         wreq.u.essid.pointer = id;
 685         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 686                 fprintf(stderr, "Get ESSID ioctl failed for interface %s\n", wificard);
 687                 return smprintf(unknowntext);
 688         }
 689
 690         /* return the essid */
 691         if (strcmp((char *)wreq.u.essid.pointer, "") == 0) {
 692                 return smprintf(unknowntext);
 693         } else {
 694                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 695         }
 696 }
 697
 698 /* main function */
 699 int
 700 main(void)
 701 {
 702         char status_string[1024];
 703         struct arg argument;
 704
 705         /* try to open display */
 706         if (!(dpy = XOpenDisplay(0x0))) {
 707                 fprintf(stderr, "Cannot open display!\n");
 708                 exit(1);
 709         }
 710
 711         /* return status every interval */
 712         for (;;) {
 713                 /* clear the string */
 714                 memset(status_string, 0, sizeof(status_string));
 715
 716                 /* generate status_string */
 717                 for (size_t i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 718                         argument = args[i];
 719                         char *res = argument.func(argument.args);
 720                         char *element = smprintf(argument.format, res);
 721                         if (element == NULL) {
 722                                 element = smprintf(unknowntext);
 723                                 fprintf(stderr, "Failed to format output.\n");
 724                         }
 725                         strcat(status_string, element);
 726                         free(res);
 727                         free(element);
 728                 }
 729
 730                 /* return the statusbar */
 731                 setstatus(status_string);
 732
 733                 /* wait, "update_interval - 1" because of get_cpu_usage() which uses 1 second */
 734                 sleep(update_interval -1);
 735         }
 736
 737         /* close display */
 738         XCloseDisplay(dpy);
 739
 740         /* exit successfully */
 741         return 0;
 742 }