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)();
  33 struct arg {
  34         op_fun func;
  35         const char *format;
  36         const char *args;
  37 };
  38
  39 static void setstatus(const char *);
  40 static char *smprintf(const char *, ...);
  41 static char *battery_perc(const char *);
  42 static char *cpu_perc(void);
  43 static char *datetime(const char *);
  44 static char *disk_free(const char *);
  45 static char *disk_perc(const char *);
  46 static char *disk_total(const char *);
  47 static char *disk_used(const char *);
  48 static char *entropy(void);
  49 static char *gid(void);
  50 static char *hostname(void);
  51 static char *ip(const char *);
  52 static char *load_avg(void);
  53 static char *ram_free(void);
  54 static char *ram_perc(void);
  55 static char *ram_used(void);
  56 static char *ram_total(void);
  57 static char *run_command(const char *);
  58 static char *temp(const char *);
  59 static char *uid(void);
  60 static char *uptime(void);
  61 static char *username(void);
  62 static char *vol_perc(const char *);
  63 static char *wifi_perc(const char *);
  64 static char *wifi_essid(const char *);
  65
  66 static Display *dpy;
  67
  68 #include "config.h"
  69
  70 static 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 static 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 static 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 static char *
 132 cpu_perc(void)
 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 static 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 static 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 static 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 static 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 static 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 static char *
 240 entropy(void)
 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 static char *
 256 gid(void)
 257 {
 258         gid_t gid = getgid();
 259         return smprintf("%d", gid);
 260 }
 261
 262 static char *
 263 hostname(void)
 264 {
 265         char hostname[HOST_NAME_MAX];
 266         FILE *fp;
 267
 268         if (!(fp = fopen("/proc/sys/kernel/hostname", "r"))) {
 269                 fprintf(stderr, "Could not open hostname file.\n");
 270                 return smprintf(unknowntext);
 271         }
 272
 273         fscanf(fp, "%s\n", hostname);
 274         fclose(fp);
 275         return smprintf("%s", hostname);
 276 }
 277
 278 static char *
 279 ip(const char *interface)
 280 {
 281         struct ifaddrs *ifaddr, *ifa;
 282         int s;
 283         char host[NI_MAXHOST];
 284
 285         if (getifaddrs(&ifaddr) == -1) {
 286                 fprintf(stderr, "Error getting IP address.\n");
 287                 return smprintf(unknowntext);
 288         }
 289
 290         /* get the ip address */
 291         for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
 292                 if (ifa->ifa_addr == NULL)
 293                         continue;
 294
 295                 s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
 296
 297                 if ((strcmp(ifa->ifa_name, interface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
 298                         if (s != 0) {
 299                                 fprintf(stderr, "Error getting IP address.\n");
 300                                 return smprintf(unknowntext);
 301                         }
 302                         return smprintf("%s", host);
 303                 }
 304         }
 305
 306         /* free the address */
 307         freeifaddrs(ifaddr);
 308
 309         return smprintf(unknowntext);
 310 }
 311
 312 static char *
 313 load_avg(void)
 314 {
 315         double avgs[3];
 316
 317         if (getloadavg(avgs, 3) < 0) {
 318                 fprintf(stderr, "Error getting load avg.\n");
 319                 return smprintf(unknowntext);
 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         if (!(fp = fopen("/proc/meminfo", "r"))) {
 332                 fprintf(stderr, "Error opening meminfo file.\n");
 333                 return smprintf(unknowntext);
 334         }
 335
 336         fscanf(fp, "MemFree: %ld kB\n", &free);
 337         fclose(fp);
 338         return smprintf("%f", (float)free / 1024 / 1024);
 339 }
 340
 341 static char *
 342 ram_perc(void)
 343 {
 344         int perc;
 345         long total, free, buffers, cached;
 346         FILE *fp;
 347
 348         if (!(fp = fopen("/proc/meminfo", "r"))) {
 349                 fprintf(stderr, "Error opening meminfo file.\n");
 350                 return smprintf(unknowntext);
 351         }
 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
 358         fclose(fp);
 359         perc = 100 * ((total - free) - (buffers + cached)) / total;
 360         return smprintf("%d%%", perc);
 361 }
 362
 363 static char *
 364 ram_total(void)
 365 {
 366         long total;
 367         FILE *fp;
 368
 369         if (!(fp = fopen("/proc/meminfo", "r"))) {
 370                 fprintf(stderr, "Error opening meminfo file.\n");
 371                 return smprintf(unknowntext);
 372         }
 373
 374         fscanf(fp, "MemTotal: %ld kB\n", &total);
 375         fclose(fp);
 376         return smprintf("%f", (float)total / 1024 / 1024);
 377 }
 378
 379 static char *
 380 ram_used(void)
 381 {
 382         long free, total, buffers, cached, used;
 383         FILE *fp;
 384
 385         if (!(fp = fopen("/proc/meminfo", "r"))) {
 386                 fprintf(stderr, "Error opening meminfo file.\n");
 387                 return smprintf(unknowntext);
 388         }
 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
 395         fclose(fp);
 396         used = total - free - buffers - cached;
 397         return smprintf("%f", (float)used / 1024 / 1024);
 398 }
 399
 400 static char *
 401 run_command(const char* command)
 402 {
 403         int good;
 404         FILE *fp;
 405         char buffer[64];
 406
 407         if (!(fp = popen(command, "r"))) {
 408                 fprintf(stderr, "Could not get command output for: %s.\n", command);
 409                 return smprintf(unknowntext);
 410         }
 411
 412         fgets(buffer, sizeof(buffer) - 1, fp);
 413         pclose(fp);
 414         for (int i = 0 ; i != sizeof(buffer); i++) {
 415                 if (buffer[i] == '\0') {
 416                         good = 1;
 417                         break;
 418                 }
 419         }
 420         if (good)
 421                 buffer[strlen(buffer) - 1] = '\0';
 422         return smprintf("%s", buffer);
 423 }
 424
 425 static char *
 426 temp(const char *file)
 427 {
 428         int temperature;
 429         FILE *fp;
 430
 431         if (!(fp = fopen(file, "r"))) {
 432                 fprintf(stderr, "Could not open temperature file.\n");
 433                 return smprintf(unknowntext);
 434         }
 435
 436         fscanf(fp, "%d", &temperature);
 437         fclose(fp);
 438         return smprintf("%d°C", temperature / 1000);
 439 }
 440
 441 static char *
 442 uptime(void)
 443 {
 444         struct sysinfo info;
 445         int hours = 0;
 446         int minutes = 0;
 447
 448         sysinfo(&info);
 449         hours = info.uptime / 3600;
 450         minutes = (info.uptime - hours * 3600 ) / 60;
 451
 452         return smprintf("%dh %dm", hours, minutes);
 453 }
 454
 455 static char *
 456 username(void)
 457 {
 458         register struct passwd *pw;
 459         register uid_t uid;
 460
 461         uid = geteuid();
 462         pw = getpwuid(uid);
 463
 464         if (pw)
 465                 return smprintf("%s", pw->pw_name);
 466         else {
 467                 fprintf(stderr, "Could not get username.\n");
 468                 return smprintf(unknowntext);
 469         }
 470
 471         return smprintf(unknowntext);
 472 }
 473
 474 static char *
 475 uid(void)
 476 {
 477         register uid_t uid;
 478
 479         uid = geteuid();
 480
 481         if (uid)
 482                 return smprintf("%d", uid);
 483         else {
 484                 fprintf(stderr, "Could not get uid.\n");
 485                 return smprintf(unknowntext);
 486         }
 487
 488         return smprintf(unknowntext);
 489 }
 490
 491
 492 static char *
 493 vol_perc(const char *soundcard)
 494 {
 495         int mute = 0;
 496         long vol = 0, max = 0, min = 0;
 497         snd_mixer_t *handle;
 498         snd_mixer_elem_t *pcm_mixer, *mas_mixer;
 499         snd_mixer_selem_id_t *vol_info, *mute_info;
 500
 501         snd_mixer_open(&handle, 0);
 502         snd_mixer_attach(handle, soundcard);
 503         snd_mixer_selem_register(handle, NULL, NULL);
 504         snd_mixer_load(handle);
 505
 506         snd_mixer_selem_id_malloc(&vol_info);
 507         snd_mixer_selem_id_malloc(&mute_info);
 508         if (vol_info == NULL || mute_info == NULL) {
 509                 fprintf(stderr, "Could not get alsa volume.\n");
 510                 return smprintf(unknowntext);
 511         }
 512         snd_mixer_selem_id_set_name(vol_info, channel);
 513         snd_mixer_selem_id_set_name(mute_info, channel);
 514         pcm_mixer = snd_mixer_find_selem(handle, vol_info);
 515         mas_mixer = snd_mixer_find_selem(handle, mute_info);
 516
 517         snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, &min, &max);
 518         snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, SND_MIXER_SCHN_MONO, &vol);
 519         snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO, &mute);
 520
 521         if (vol_info)
 522                 snd_mixer_selem_id_free(vol_info);
 523         if (mute_info)
 524                 snd_mixer_selem_id_free(mute_info);
 525         if (handle)
 526                 snd_mixer_close(handle);
 527
 528         if (!mute)
 529                 return smprintf("mute");
 530         else
 531                 return smprintf("%d%%", (vol * 100) / max);
 532 }
 533
 534 static char *
 535 wifi_perc(const char *wificard)
 536 {
 537         int bufsize = 255;
 538         int strength;
 539         char buf[bufsize];
 540         char *datastart;
 541         char path[64];
 542         char status[5];
 543         char needle[sizeof wificard + 1];
 544         FILE *fp;
 545
 546         memset(path, 0, sizeof path);
 547         strlcat(path, "/sys/class/net/", sizeof(path));
 548         strlcat(path, wificard, sizeof(path));
 549         strlcat(path, "/operstate", sizeof(path));
 550
 551         if(!(fp = fopen(path, "r"))) {
 552                 fprintf(stderr, "Error opening wifi operstate file.\n");
 553                 return smprintf(unknowntext);
 554         }
 555
 556         fgets(status, 5, fp);
 557         fclose(fp);
 558         if(strcmp(status, "up\n") != 0)
 559                 return smprintf(unknowntext);
 560
 561         if (!(fp = fopen("/proc/net/wireless", "r"))) {
 562                 fprintf(stderr, "Error opening wireless file.\n");
 563                 return smprintf(unknowntext);
 564         }
 565
 566         strlcpy(needle, wificard, sizeof(needle));
 567         strlcat(needle, ":", sizeof(needle));
 568         fgets(buf, bufsize, fp);
 569         fgets(buf, bufsize, fp);
 570         fgets(buf, bufsize, fp);
 571         if ((datastart = strstr(buf, needle)) != NULL) {
 572                 datastart = strstr(buf, ":");
 573                 sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &strength);
 574         }
 575
 576         fclose(fp);
 577         return smprintf("%d%%", strength);
 578 }
 579
 580 static char *
 581 wifi_essid(const char *wificard)
 582 {
 583         char id[IW_ESSID_MAX_SIZE+1];
 584         int sockfd;
 585         struct iwreq wreq;
 586
 587         memset(&wreq, 0, sizeof(struct iwreq));
 588         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 589         sprintf(wreq.ifr_name, wificard);
 590         if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
 591                 fprintf(stderr, "Cannot open socket for interface: %s\n", wificard);
 592                 return smprintf(unknowntext);
 593         }
 594         wreq.u.essid.pointer = id;
 595         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 596                 fprintf(stderr, "Get ESSID ioctl failed for interface %s\n", wificard);
 597                 return smprintf(unknowntext);
 598         }
 599
 600         if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
 601                 return smprintf(unknowntext);
 602         else
 603                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 604 }
 605
 606 int
 607 main(void)
 608 {
 609         size_t i;
 610         char status_string[4096];
 611         char *res, *element;
 612         struct arg argument;
 613
 614         if (!(dpy = XOpenDisplay(0x0))) {
 615                 fprintf(stderr, "Cannot open display!\n");
 616                 exit(1);
 617         }
 618
 619         for (;;) {
 620                 memset(status_string, 0, sizeof(status_string));
 621                 for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 622                         argument = args[i];
 623                         if (argument.args == NULL)
 624                                 res = argument.func();
 625                         else
 626                                 res = argument.func(argument.args);
 627                         element = smprintf(argument.format, res);
 628                         if (element == NULL) {
 629                                 element = smprintf(unknowntext);
 630                                 fprintf(stderr, "Failed to format output.\n");
 631                         }
 632                         strlcat(status_string, element, sizeof(status_string));
 633                         free(res);
 634                         free(element);
 635                 }
 636
 637                 setstatus(status_string);
 638                 sleep(update_interval -1);
 639         }
 640
 641         XCloseDisplay(dpy);
 642         return 0;
 643 }