slstatus.c

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