slstatus.c

   1 /* See LICENSE file for copyright and license details. */
   2
   3 #include <alsa/asoundlib.h>
   4 #include <fcntl.h>
   5 #include <ifaddrs.h>
   6 #include <limits.h>
   7 #include <linux/wireless.h>
   8 #include <netdb.h>
   9 #include <pwd.h>
  10 #include <stdarg.h>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <sys/ioctl.h>
  15 #include <sys/stat.h>
  16 #include <sys/statvfs.h>
  17 #include <sys/socket.h>
  18 #include <sys/sysinfo.h>
  19 #include <sys/types.h>
  20 #include <time.h>
  21 #include <unistd.h>
  22 #include <X11/Xlib.h>
  23
  24 #undef strlcat
  25 #undef strlcpy
  26
  27 #include "strlcat.h"
  28 #include "strlcpy.h"
  29
  30 struct arg {
  31         char *(*func)();
  32         const char *format;
  33         const char *args;
  34 };
  35
  36 static void setstatus(const char *);
  37 static char *smprintf(const char *, ...);
  38 static char *battery_perc(const char *);
  39 static char *cpu_perc(void);
  40 static char *datetime(const char *);
  41 static char *disk_free(const char *);
  42 static char *disk_perc(const char *);
  43 static char *disk_total(const char *);
  44 static char *disk_used(const char *);
  45 static char *entropy(void);
  46 static char *gid(void);
  47 static char *hostname(void);
  48 static char *ip(const char *);
  49 static char *load_avg(void);
  50 static char *ram_free(void);
  51 static char *ram_perc(void);
  52 static char *ram_used(void);
  53 static char *ram_total(void);
  54 static char *run_command(const char *);
  55 static char *temp(const char *);
  56 static char *uid(void);
  57 static char *uptime(void);
  58 static char *username(void);
  59 static char *vol_perc(const char *);
  60 static char *wifi_perc(const char *);
  61 static char *wifi_essid(const char *);
  62
  63 static Display *dpy;
  64
  65 #include "config.h"
  66
  67 static void
  68 setstatus(const char *str)
  69 {
  70         /* set WM_NAME via X11 */
  71         XStoreName(dpy, DefaultRootWindow(dpy), str);
  72         XSync(dpy, False);
  73 }
  74
  75 static char *
  76 smprintf(const char *fmt, ...)
  77 {
  78         va_list ap;
  79         char *ret;
  80         int len;
  81
  82         va_start(ap, fmt);
  83         len = vsnprintf(NULL, 0, fmt, ap);
  84         va_end(ap);
  85
  86         ret = malloc(++len);
  87         if (ret == NULL) {
  88                 perror("malloc");
  89                 exit(1);
  90         }
  91
  92         va_start(ap, fmt);
  93         vsnprintf(ret, len, fmt, ap);
  94         va_end(ap);
  95
  96         return ret;
  97 }
  98
  99 static char *
 100 battery_perc(const char *battery)
 101 {
 102         int now, full, perc;
 103         char batterynowfile[64];
 104         char batteryfullfile[64];
 105         FILE *fp;
 106
 107         strlcpy(batterynowfile, BATTERY_PATH, sizeof(batterynowfile));
 108         strlcat(batterynowfile, battery, sizeof(batterynowfile));
 109         strlcat(batterynowfile, "/", sizeof(batterynowfile));
 110         strlcat(batterynowfile, BATTERY_NOW, sizeof(batterynowfile));
 111
 112         strlcpy(batteryfullfile, BATTERY_PATH, sizeof(batteryfullfile));
 113         strlcat(batteryfullfile, battery, sizeof(batteryfullfile));
 114         strlcat(batteryfullfile, "/", sizeof(batteryfullfile));
 115         strlcat(batteryfullfile, BATTERY_FULL, sizeof(batteryfullfile));
 116
 117         fp = fopen(batterynowfile, "r");
 118         if (fp == NULL ) {
 119                 fprintf(stderr, "Error opening battery file: %s: %s\n",
 120                                                 batterynowfile,
 121                                                 strerror(errno));
 122                 return smprintf(UNKNOWN_STR);
 123         }
 124
 125         fscanf(fp, "%i", &now);
 126         fclose(fp);
 127
 128         fp = fopen(batteryfullfile, "r");
 129         if (fp == NULL) {
 130                 fprintf(stderr, "Error opening battery file: %s\n",
 131                                                 strerror(errno));
 132                 return smprintf(UNKNOWN_STR);
 133         }
 134
 135         fscanf(fp, "%i", &full);
 136         fclose(fp);
 137
 138         perc = now / (full / 100);
 139
 140         return smprintf("%d%%", perc);
 141 }
 142
 143 static char *
 144 cpu_perc(void)
 145 {
 146         int perc;
 147         long double a[4], b[4];
 148         FILE *fp = fopen("/proc/stat","r");
 149
 150         if (fp == NULL) {
 151                 fprintf(stderr, "Error opening stat file: %s\n",
 152                                                 strerror(errno));
 153                 return smprintf(UNKNOWN_STR);
 154         }
 155
 156         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
 157         fclose(fp);
 158
 159         /* wait a second (for avg values) */
 160         sleep(1);
 161
 162         fp = fopen("/proc/stat","r");
 163         if (fp == NULL) {
 164                 fprintf(stderr, "Error opening stat file: %s\n",
 165                                                 strerror(errno));
 166                 return smprintf(UNKNOWN_STR);
 167         }
 168
 169         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
 170         fclose(fp);
 171         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]));
 172         return smprintf("%d%%", perc);
 173 }
 174
 175 static char *
 176 datetime(const char *timeformat)
 177 {
 178         time_t t;
 179         char timestr[80];
 180
 181         t = time(NULL);
 182         if (strftime(timestr, sizeof(timestr), timeformat, localtime(&t)) == 0)
 183                 return smprintf(UNKNOWN_STR);
 184
 185         return smprintf("%s", timestr);
 186 }
 187
 188 static char *
 189 disk_free(const char *mountpoint)
 190 {
 191         struct statvfs fs;
 192
 193         if (statvfs(mountpoint, &fs) < 0) {
 194                 fprintf(stderr, "Could not get filesystem info: %s\n",
 195                                                 strerror(errno));
 196                 return smprintf(UNKNOWN_STR);
 197         }
 198         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
 199 }
 200
 201 static char *
 202 disk_perc(const char *mountpoint)
 203 {
 204         int perc = 0;
 205         struct statvfs fs;
 206
 207         if (statvfs(mountpoint, &fs) < 0) {
 208                 fprintf(stderr, "Could not get filesystem info: %s\n",
 209                                                 strerror(errno));
 210                 return smprintf(UNKNOWN_STR);
 211         }
 212
 213         perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
 214         return smprintf("%d%%", perc);
 215 }
 216
 217 static char *
 218 disk_total(const char *mountpoint)
 219 {
 220         struct statvfs fs;
 221
 222         if (statvfs(mountpoint, &fs) < 0) {
 223                 fprintf(stderr, "Could not get filesystem info: %s\n",
 224                                                 strerror(errno));
 225                 return smprintf(UNKNOWN_STR);
 226         }
 227
 228         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
 229 }
 230
 231 static char *
 232 disk_used(const char *mountpoint)
 233 {
 234         struct statvfs fs;
 235
 236         if (statvfs(mountpoint, &fs) < 0) {
 237                 fprintf(stderr, "Could not get filesystem info: %s\n",
 238                                                 strerror(errno));
 239                 return smprintf(UNKNOWN_STR);
 240         }
 241
 242         return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
 243 }
 244
 245 static char *
 246 entropy(void)
 247 {
 248         int entropy = 0;
 249         FILE *fp = fopen("/proc/sys/kernel/random/entropy_avail", "r");
 250
 251         if (fp == NULL) {
 252                 fprintf(stderr, "Could not open entropy file: %s\n",
 253                                                 strerror(errno));
 254                 return smprintf(UNKNOWN_STR);
 255         }
 256
 257         fscanf(fp, "%d", &entropy);
 258         fclose(fp);
 259         return smprintf("%d", entropy);
 260 }
 261
 262 static char *
 263 gid(void)
 264 {
 265         gid_t gid = getgid();
 266         return smprintf("%d", gid);
 267 }
 268
 269 static char *
 270 hostname(void)
 271 {
 272         char hostname[HOST_NAME_MAX];
 273         FILE *fp = fopen("/proc/sys/kernel/hostname", "r");
 274
 275         if (fp == NULL) {
 276                 fprintf(stderr, "Could not open hostname file: %s\n",
 277                                                 strerror(errno));
 278                 return smprintf(UNKNOWN_STR);
 279         }
 280
 281         fgets(hostname, sizeof(hostname), fp);
 282         /* FIXME: needs improvement */
 283         memset(&hostname[strlen(hostname)-1], '\0',
 284                 sizeof(hostname) - strlen(hostname));
 285         fclose(fp);
 286         return smprintf("%s", hostname);
 287 }
 288
 289 static char *
 290 ip(const char *interface)
 291 {
 292         struct ifaddrs *ifaddr, *ifa;
 293         int s;
 294         char host[NI_MAXHOST];
 295
 296         if (getifaddrs(&ifaddr) == -1) {
 297                 fprintf(stderr, "Error getting IP address: %s\n",
 298                                                 strerror(errno));
 299                 return smprintf(UNKNOWN_STR);
 300         }
 301
 302         /* get the ip address */
 303         for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
 304                 if (ifa->ifa_addr == NULL)
 305                         continue;
 306
 307                 s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST,
 308                                                                 NULL, 0, NI_NUMERICHOST);
 309
 310                 if ((strcmp(ifa->ifa_name, interface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
 311                         if (s != 0) {
 312                                 fprintf(stderr, "Error getting IP address.\n");
 313                                 return smprintf(UNKNOWN_STR);
 314                         }
 315                         return smprintf("%s", host);
 316                 }
 317         }
 318
 319         /* free the address */
 320         freeifaddrs(ifaddr);
 321
 322         return smprintf(UNKNOWN_STR);
 323 }
 324
 325 static char *
 326 load_avg(void)
 327 {
 328         double avgs[3];
 329
 330         if (getloadavg(avgs, 3) < 0) {
 331                 fprintf(stderr, "Error getting load avg.\n");
 332                 return smprintf(UNKNOWN_STR);
 333         }
 334
 335         return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
 336 }
 337
 338 static char *
 339 ram_free(void)
 340 {
 341         long free;
 342         FILE *fp = fopen("/proc/meminfo", "r");
 343
 344         if (fp == NULL) {
 345                 fprintf(stderr, "Error opening meminfo file: %s\n",
 346                                                 strerror(errno));
 347                 return smprintf(UNKNOWN_STR);
 348         }
 349
 350         fscanf(fp, "MemFree: %ld kB\n", &free);
 351         fclose(fp);
 352         return smprintf("%f", (float)free / 1024 / 1024);
 353 }
 354
 355 static char *
 356 ram_perc(void)
 357 {
 358         int perc;
 359         long total, free, buffers, cached;
 360         FILE *fp = fopen("/proc/meminfo", "r");
 361
 362         if (fp == NULL) {
 363                 fprintf(stderr, "Error opening meminfo file: %s\n",
 364                                                 strerror(errno));
 365                 return smprintf(UNKNOWN_STR);
 366         }
 367
 368         fscanf(fp, "MemTotal: %ld kB\n", &total);
 369         fscanf(fp, "MemFree: %ld kB\n", &free);
 370         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 371         fscanf(fp, "Cached: %ld kB\n", &cached);
 372
 373         fclose(fp);
 374         perc = 100 * ((total - free) - (buffers + cached)) / total;
 375         return smprintf("%d%%", perc);
 376 }
 377
 378 static char *
 379 ram_total(void)
 380 {
 381         long total;
 382         FILE *fp = fopen("/proc/meminfo", "r");
 383
 384         if (fp == NULL) {
 385                 fprintf(stderr, "Error opening meminfo file: %s\n",
 386                                                 strerror(errno));
 387                 return smprintf(UNKNOWN_STR);
 388         }
 389
 390         fscanf(fp, "MemTotal: %ld kB\n", &total);
 391         fclose(fp);
 392         return smprintf("%f", (float)total / 1024 / 1024);
 393 }
 394
 395 static char *
 396 ram_used(void)
 397 {
 398         long free, total, buffers, cached, used;
 399         FILE *fp = fopen("/proc/meminfo", "r");
 400
 401         if (fp == NULL) {
 402                 fprintf(stderr, "Error opening meminfo file: %s\n",
 403                                                 strerror(errno));
 404                 return smprintf(UNKNOWN_STR);
 405         }
 406
 407         fscanf(fp, "MemTotal: %ld kB\n", &total);
 408         fscanf(fp, "MemFree: %ld kB\n", &free);
 409         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 410         fscanf(fp, "Cached: %ld kB\n", &cached);
 411
 412         fclose(fp);
 413         used = total - free - buffers - cached;
 414         return smprintf("%f", (float)used / 1024 / 1024);
 415 }
 416
 417 static char *
 418 run_command(const char* command)
 419 {
 420         int good;
 421         FILE *fp = popen(command, "r");
 422         char buffer[64];
 423
 424         if (fp == NULL) {
 425                 fprintf(stderr, "Could not get command output for: %s: %s\n",
 426                                                 command, strerror(errno));
 427                 return smprintf(UNKNOWN_STR);
 428         }
 429
 430         fgets(buffer, sizeof(buffer)-1, fp);
 431         pclose(fp);
 432         for (int i = 0 ; i != sizeof(buffer); i++) {
 433                 if (buffer[i] == '\0') {
 434                         good = 1;
 435                         break;
 436                 }
 437         }
 438         if (good)
 439                 buffer[strlen(buffer)-1] = '\0';
 440         return smprintf("%s", buffer);
 441 }
 442
 443 static char *
 444 temp(const char *file)
 445 {
 446         int temperature;
 447         FILE *fp = fopen(file, "r");
 448
 449         if (fp == NULL) {
 450                 fprintf(stderr, "Could not open temperature file: %s\n",
 451                                                         strerror(errno));
 452                 return smprintf(UNKNOWN_STR);
 453         }
 454
 455         fscanf(fp, "%d", &temperature);
 456         fclose(fp);
 457         return smprintf("%d°C", temperature / 1000);
 458 }
 459
 460 static char *
 461 uptime(void)
 462 {
 463         struct sysinfo info;
 464         int hours = 0;
 465         int minutes = 0;
 466
 467         sysinfo(&info);
 468         hours = info.uptime / 3600;
 469         minutes = (info.uptime - hours * 3600 ) / 60;
 470
 471         return smprintf("%dh %dm", hours, minutes);
 472 }
 473
 474 static char *
 475 username(void)
 476 {
 477         uid_t uid = geteuid();
 478         struct passwd *pw = getpwuid(uid);
 479
 480         if (pw == NULL)
 481                 return smprintf("%s", pw->pw_name);
 482
 483         fprintf(stderr, "Could not get username: %s\n",
 484                                         strerror(errno));
 485         return smprintf(UNKNOWN_STR);
 486 }
 487
 488 static char *
 489 uid(void)
 490 {
 491         return smprintf("%d", geteuid());
 492 }
 493
 494
 495 static char *
 496 vol_perc(const char *soundcard)
 497 {
 498         /*
 499          * TODO: FIXME:
 500          * https://github.com/drkh5h/slstatus/issues/12
 501          */
 502         int mute = 0;
 503         long vol = 0, max = 0, min = 0;
 504         snd_mixer_t *handle;
 505         snd_mixer_elem_t *pcm_mixer, *mas_mixer;
 506         snd_mixer_selem_id_t *vol_info, *mute_info;
 507
 508         snd_mixer_open(&handle, 0);
 509         snd_mixer_attach(handle, soundcard);
 510         snd_mixer_selem_register(handle, NULL, NULL);
 511         snd_mixer_load(handle);
 512
 513         snd_mixer_selem_id_malloc(&vol_info);
 514         snd_mixer_selem_id_malloc(&mute_info);
 515         if (vol_info == NULL || mute_info == NULL) {
 516                 fprintf(stderr, "Could not get alsa volume.\n");
 517                 return smprintf(UNKNOWN_STR);
 518         }
 519         snd_mixer_selem_id_set_name(vol_info, ALSA_CHANNEL);
 520         snd_mixer_selem_id_set_name(mute_info, ALSA_CHANNEL);
 521         pcm_mixer = snd_mixer_find_selem(handle, vol_info);
 522         mas_mixer = snd_mixer_find_selem(handle, mute_info);
 523
 524         snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, &min, &max);
 525         snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, SND_MIXER_SCHN_MONO, &vol);
 526         snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO, &mute);
 527
 528         if (vol_info)
 529                 snd_mixer_selem_id_free(vol_info);
 530         if (mute_info)
 531                 snd_mixer_selem_id_free(mute_info);
 532         if (handle)
 533                 snd_mixer_close(handle);
 534
 535         if (!mute)
 536                 return smprintf("mute");
 537         else
 538                 return smprintf("%d%%", (vol * 100) / max);
 539 }
 540
 541 static char *
 542 wifi_perc(const char *wificard)
 543 {
 544         int strength;
 545         char buf[255];
 546         char *datastart;
 547         char path[64];
 548         char status[5];
 549         char needle[strlen(wificard)+2];
 550         FILE *fp;
 551
 552         strlcpy(path, "/sys/class/net/", sizeof(path));
 553         strlcat(path, wificard, sizeof(path));
 554         strlcat(path, "/operstate", sizeof(path));
 555
 556         fp = fopen(path, "r");
 557
 558         if(fp == NULL) {
 559                 fprintf(stderr, "Error opening wifi operstate file: %s\n",
 560                                                         strerror(errno));
 561                 return smprintf(UNKNOWN_STR);
 562         }
 563
 564         fgets(status, 5, fp);
 565         fclose(fp);
 566         if(strcmp(status, "up\n") != 0)
 567                 return smprintf(UNKNOWN_STR);
 568
 569         fp = fopen("/proc/net/wireless", "r");
 570         if (fp == NULL) {
 571                 fprintf(stderr, "Error opening wireless file: %s\n",
 572                                                 strerror(errno));
 573                 return smprintf(UNKNOWN_STR);
 574         }
 575
 576         strlcpy(needle, wificard, sizeof(needle));
 577         strlcat(needle, ":", sizeof(needle));
 578         fgets(buf, sizeof(buf), fp);
 579         fgets(buf, sizeof(buf), fp);
 580         fgets(buf, sizeof(buf), fp);
 581
 582         datastart = strstr(buf, needle);
 583         if (datastart != NULL) {
 584                 datastart = strstr(buf, ":");
 585                 sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &strength);
 586         }
 587
 588         fclose(fp);
 589         return smprintf("%d%%", strength);
 590 }
 591
 592 static char *
 593 wifi_essid(const char *wificard)
 594 {
 595         char id[IW_ESSID_MAX_SIZE+1];
 596         int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
 597         struct iwreq wreq;
 598
 599         memset(&wreq, 0, sizeof(struct iwreq));
 600         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 601         sprintf(wreq.ifr_name, wificard);
 602         if(sockfd == -1) {
 603                 fprintf(stderr, "Cannot open socket for interface: %s: %s\n",
 604                                                 wificard, strerror(errno));
 605                 return smprintf(UNKNOWN_STR);
 606         }
 607         wreq.u.essid.pointer = id;
 608         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 609                 fprintf(stderr, "Get ESSID ioctl failed for interface %s: %s\n",
 610                                                 wificard, strerror(errno));
 611                 return smprintf(UNKNOWN_STR);
 612         }
 613
 614         if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
 615                 return smprintf(UNKNOWN_STR);
 616         else
 617                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 618 }
 619
 620 int
 621 main(void)
 622 {
 623         size_t i;
 624         char status_string[4096];
 625         char *res, *element;
 626         struct arg argument;
 627
 628         dpy = XOpenDisplay(0x0);
 629         if (!dpy) {
 630                 fprintf(stderr, "Cannot open display!\n");
 631                 exit(1);
 632         }
 633
 634         for (;;) {
 635                 memset(status_string, 0, sizeof(status_string));
 636                 for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 637                         argument = args[i];
 638                         if (argument.args == NULL)
 639                                 res = argument.func();
 640                         else
 641                                 res = argument.func(argument.args);
 642                         element = smprintf(argument.format, res);
 643                         if (element == NULL) {
 644                                 element = smprintf(UNKNOWN_STR);
 645                                 fprintf(stderr, "Failed to format output.\n");
 646                         }
 647                         strlcat(status_string, element, sizeof(status_string));
 648                         free(res);
 649                         free(element);
 650                 }
 651
 652                 setstatus(status_string);
 653                 sleep(UPDATE_INTERVAL -1);
 654         }
 655
 656         XCloseDisplay(dpy);
 657         return 0;
 658 }