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 ap;
  82         char *ret;
  83         int len;
  84
  85         va_start(ap, fmt);
  86         len = vsnprintf(NULL, 0, fmt, ap);
  87         va_end(ap);
  88
  89         ret = malloc(++len);
  90         if (ret == NULL) {
  91                 perror("malloc");
  92                 exit(1);
  93         }
  94
  95         va_start(ap, fmt);
  96         vsnprintf(ret, len, fmt, ap);
  97         va_end(ap);
  98
  99         return ret;
 100 }
 101
 102 static char *
 103 battery_perc(const char *battery)
 104 {
 105         int now, full, perc;
 106         char batterynowfile[64];
 107         char batteryfullfile[64];
 108         FILE *fp;
 109
 110         strlcpy(batterynowfile, BATTERY_PATH, sizeof(batterynowfile));
 111         strlcat(batterynowfile, battery, sizeof(batterynowfile));
 112         strlcat(batterynowfile, "/", sizeof(batterynowfile));
 113         strlcat(batterynowfile, BATTERY_NOW, sizeof(batterynowfile));
 114
 115         strlcpy(batteryfullfile, BATTERY_PATH, sizeof(batteryfullfile));
 116         strlcat(batteryfullfile, battery, sizeof(batteryfullfile));
 117         strlcat(batteryfullfile, "/", sizeof(batteryfullfile));
 118         strlcat(batteryfullfile, BATTERY_FULL, sizeof(batteryfullfile));
 119
 120         fp = fopen(batterynowfile, "r");
 121         if (fp == NULL ) {
 122                 fprintf(stderr, "Error opening battery file: %s: %s\n",
 123                                                 batterynowfile,
 124                                                 strerror(errno));
 125                 return smprintf(UNKNOWN_STR);
 126         }
 127
 128         fscanf(fp, "%i", &now);
 129         fclose(fp);
 130
 131         fp = fopen(batteryfullfile, "r");
 132         if (fp == NULL) {
 133                 fprintf(stderr, "Error opening battery file: %s\n",
 134                                                 strerror(errno));
 135                 return smprintf(UNKNOWN_STR);
 136         }
 137
 138         fscanf(fp, "%i", &full);
 139         fclose(fp);
 140
 141         perc = now / (full / 100);
 142
 143         return smprintf("%d%%", perc);
 144 }
 145
 146 static char *
 147 cpu_perc(void)
 148 {
 149         int perc;
 150         long double a[4], b[4];
 151         FILE *fp = fopen("/proc/stat","r");
 152
 153         if (fp == NULL) {
 154                 fprintf(stderr, "Error opening stat file: %s\n",
 155                                                 strerror(errno));
 156                 return smprintf(UNKNOWN_STR);
 157         }
 158
 159         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
 160         fclose(fp);
 161
 162         /* wait a second (for avg values) */
 163         sleep(1);
 164
 165         fp = fopen("/proc/stat","r");
 166         if (fp == NULL) {
 167                 fprintf(stderr, "Error opening stat file: %s\n",
 168                                                 strerror(errno));
 169                 return smprintf(UNKNOWN_STR);
 170         }
 171
 172         fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
 173         fclose(fp);
 174         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]));
 175         return smprintf("%d%%", perc);
 176 }
 177
 178 static char *
 179 datetime(const char *timeformat)
 180 {
 181         time_t t;
 182         char timestr[80];
 183
 184         t = time(NULL);
 185         if (strftime(timestr, sizeof(timestr), timeformat, localtime(&t)) == 0)
 186                 return smprintf(UNKNOWN_STR);
 187
 188         return smprintf("%s", timestr);
 189 }
 190
 191 static char *
 192 disk_free(const char *mountpoint)
 193 {
 194         struct statvfs fs;
 195
 196         if (statvfs(mountpoint, &fs) < 0) {
 197                 fprintf(stderr, "Could not get filesystem info: %s\n",
 198                                                 strerror(errno));
 199                 return smprintf(UNKNOWN_STR);
 200         }
 201         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
 202 }
 203
 204 static char *
 205 disk_perc(const char *mountpoint)
 206 {
 207         int perc = 0;
 208         struct statvfs fs;
 209
 210         if (statvfs(mountpoint, &fs) < 0) {
 211                 fprintf(stderr, "Could not get filesystem info: %s\n",
 212                                                 strerror(errno));
 213                 return smprintf(UNKNOWN_STR);
 214         }
 215
 216         perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
 217         return smprintf("%d%%", perc);
 218 }
 219
 220 static char *
 221 disk_total(const char *mountpoint)
 222 {
 223         struct statvfs fs;
 224
 225         if (statvfs(mountpoint, &fs) < 0) {
 226                 fprintf(stderr, "Could not get filesystem info: %s\n",
 227                                                 strerror(errno));
 228                 return smprintf(UNKNOWN_STR);
 229         }
 230
 231         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
 232 }
 233
 234 static char *
 235 disk_used(const char *mountpoint)
 236 {
 237         struct statvfs fs;
 238
 239         if (statvfs(mountpoint, &fs) < 0) {
 240                 fprintf(stderr, "Could not get filesystem info: %s\n",
 241                                                 strerror(errno));
 242                 return smprintf(UNKNOWN_STR);
 243         }
 244
 245         return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
 246 }
 247
 248 static char *
 249 entropy(void)
 250 {
 251         int entropy = 0;
 252         FILE *fp = fopen("/proc/sys/kernel/random/entropy_avail", "r");
 253
 254         if (fp == NULL) {
 255                 fprintf(stderr, "Could not open entropy file.\n");
 256                 return smprintf(UNKNOWN_STR);
 257         }
 258
 259         fscanf(fp, "%d", &entropy);
 260         fclose(fp);
 261         return smprintf("%d", entropy);
 262 }
 263
 264 static char *
 265 gid(void)
 266 {
 267         gid_t gid = getgid();
 268         return smprintf("%d", gid);
 269 }
 270
 271 static char *
 272 hostname(void)
 273 {
 274         char hostname[HOST_NAME_MAX];
 275         FILE *fp = fopen("/proc/sys/kernel/hostname", "r");
 276
 277         if (fp == NULL) {
 278                 fprintf(stderr, "Could not open hostname file: %s\n",
 279                                                 strerror(errno));
 280                 return smprintf(UNKNOWN_STR);
 281         }
 282
 283         fgets(hostname, sizeof(hostname), fp);
 284         /* FIXME: needs improvement */
 285         memset(&hostname[strlen(hostname)-1], '\0',
 286                 sizeof(hostname) - strlen(hostname));
 287         fclose(fp);
 288         return smprintf("%s", hostname);
 289 }
 290
 291 static char *
 292 ip(const char *interface)
 293 {
 294         struct ifaddrs *ifaddr, *ifa;
 295         int s;
 296         char host[NI_MAXHOST];
 297
 298         if (getifaddrs(&ifaddr) == -1) {
 299                 fprintf(stderr, "Error getting IP address: %s\n",
 300                                                 strerror(errno));
 301                 return smprintf(UNKNOWN_STR);
 302         }
 303
 304         /* get the ip address */
 305         for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
 306                 if (ifa->ifa_addr == NULL)
 307                         continue;
 308
 309                 s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST,
 310                                                                 NULL, 0, NI_NUMERICHOST);
 311
 312                 if ((strcmp(ifa->ifa_name, interface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
 313                         if (s != 0) {
 314                                 fprintf(stderr, "Error getting IP address.\n");
 315                                 return smprintf(UNKNOWN_STR);
 316                         }
 317                         return smprintf("%s", host);
 318                 }
 319         }
 320
 321         /* free the address */
 322         freeifaddrs(ifaddr);
 323
 324         return smprintf(UNKNOWN_STR);
 325 }
 326
 327 static char *
 328 load_avg(void)
 329 {
 330         double avgs[3];
 331
 332         if (getloadavg(avgs, 3) < 0) {
 333                 fprintf(stderr, "Error getting load avg.\n");
 334                 return smprintf(UNKNOWN_STR);
 335         }
 336
 337         return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
 338 }
 339
 340 static char *
 341 ram_free(void)
 342 {
 343         long free;
 344         FILE *fp = fopen("/proc/meminfo", "r");
 345
 346         if (fp == NULL) {
 347                 fprintf(stderr, "Error opening meminfo file: %s\n",
 348                                                 strerror(errno));
 349                 return smprintf(UNKNOWN_STR);
 350         }
 351
 352         fscanf(fp, "MemFree: %ld kB\n", &free);
 353         fclose(fp);
 354         return smprintf("%f", (float)free / 1024 / 1024);
 355 }
 356
 357 static char *
 358 ram_perc(void)
 359 {
 360         int perc;
 361         long total, free, buffers, cached;
 362         FILE *fp = fopen("/proc/meminfo", "r");
 363
 364         if (fp == NULL) {
 365                 fprintf(stderr, "Error opening meminfo file: %s\n",
 366                                                 strerror(errno));
 367                 return smprintf(UNKNOWN_STR);
 368         }
 369
 370         fscanf(fp, "MemTotal: %ld kB\n", &total);
 371         fscanf(fp, "MemFree: %ld kB\n", &free);
 372         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 373         fscanf(fp, "Cached: %ld kB\n", &cached);
 374
 375         fclose(fp);
 376         perc = 100 * ((total - free) - (buffers + cached)) / total;
 377         return smprintf("%d%%", perc);
 378 }
 379
 380 static char *
 381 ram_total(void)
 382 {
 383         long total;
 384         FILE *fp = fopen("/proc/meminfo", "r");
 385
 386         if (fp == NULL) {
 387                 fprintf(stderr, "Error opening meminfo file: %s\n",
 388                                                 strerror(errno));
 389                 return smprintf(UNKNOWN_STR);
 390         }
 391
 392         fscanf(fp, "MemTotal: %ld kB\n", &total);
 393         fclose(fp);
 394         return smprintf("%f", (float)total / 1024 / 1024);
 395 }
 396
 397 static char *
 398 ram_used(void)
 399 {
 400         long free, total, buffers, cached, used;
 401         FILE *fp = fopen("/proc/meminfo", "r");
 402
 403         if (fp == NULL) {
 404                 fprintf(stderr, "Error opening meminfo file: %s\n",
 405                                                 strerror(errno));
 406                 return smprintf(UNKNOWN_STR);
 407         }
 408
 409         fscanf(fp, "MemTotal: %ld kB\n", &total);
 410         fscanf(fp, "MemFree: %ld kB\n", &free);
 411         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 412         fscanf(fp, "Cached: %ld kB\n", &cached);
 413
 414         fclose(fp);
 415         used = total - free - buffers - cached;
 416         return smprintf("%f", (float)used / 1024 / 1024);
 417 }
 418
 419 static char *
 420 run_command(const char* command)
 421 {
 422         int good;
 423         FILE *fp = popen(command, "r");
 424         char buffer[64];
 425
 426         if (fp == NULL) {
 427                 fprintf(stderr, "Could not get command output for: %s: %s\n",
 428                                                 command, strerror(errno));
 429                 return smprintf(UNKNOWN_STR);
 430         }
 431
 432         fgets(buffer, sizeof(buffer)-1, fp);
 433         pclose(fp);
 434         for (int i = 0 ; i != sizeof(buffer); i++) {
 435                 if (buffer[i] == '\0') {
 436                         good = 1;
 437                         break;
 438                 }
 439         }
 440         if (good)
 441                 buffer[strlen(buffer)-1] = '\0';
 442         return smprintf("%s", buffer);
 443 }
 444
 445 static char *
 446 temp(const char *file)
 447 {
 448         int temperature;
 449         FILE *fp = fopen(file, "r");
 450
 451         if (fp == NULL) {
 452                 fprintf(stderr, "Could not open temperature file: %s\n",
 453                                                         strerror(errno));
 454                 return smprintf(UNKNOWN_STR);
 455         }
 456
 457         fscanf(fp, "%d", &temperature);
 458         fclose(fp);
 459         return smprintf("%d°C", temperature / 1000);
 460 }
 461
 462 static char *
 463 uptime(void)
 464 {
 465         struct sysinfo info;
 466         int hours = 0;
 467         int minutes = 0;
 468
 469         sysinfo(&info);
 470         hours = info.uptime / 3600;
 471         minutes = (info.uptime - hours * 3600 ) / 60;
 472
 473         return smprintf("%dh %dm", hours, minutes);
 474 }
 475
 476 static char *
 477 username(void)
 478 {
 479         register struct passwd *pw;
 480         register uid_t uid;
 481
 482         uid = geteuid();
 483         pw = getpwuid(uid);
 484
 485         if (pw)
 486                 return smprintf("%s", pw->pw_name);
 487         else {
 488                 fprintf(stderr, "Could not get username: %s\n",
 489                                         strerror(errno));
 490                 return smprintf(UNKNOWN_STR);
 491         }
 492
 493         return smprintf(UNKNOWN_STR);
 494 }
 495
 496 static char *
 497 uid(void)
 498 {
 499         /* FIXME: WHY USE register modifier? */
 500         register uid_t uid;
 501
 502         uid = geteuid();
 503
 504         if (uid)
 505                 return smprintf("%d", uid);
 506         else {
 507                 fprintf(stderr, "Could not get uid.\n");
 508                 return smprintf(UNKNOWN_STR);
 509         }
 510
 511         return smprintf(UNKNOWN_STR);
 512 }
 513
 514
 515 static char *
 516 vol_perc(const char *soundcard)
 517 {
 518         int mute = 0;
 519         long vol = 0, max = 0, min = 0;
 520         snd_mixer_t *handle;
 521         snd_mixer_elem_t *pcm_mixer, *mas_mixer;
 522         snd_mixer_selem_id_t *vol_info, *mute_info;
 523
 524         snd_mixer_open(&handle, 0);
 525         snd_mixer_attach(handle, soundcard);
 526         snd_mixer_selem_register(handle, NULL, NULL);
 527         snd_mixer_load(handle);
 528
 529         snd_mixer_selem_id_malloc(&vol_info);
 530         snd_mixer_selem_id_malloc(&mute_info);
 531         if (vol_info == NULL || mute_info == NULL) {
 532                 fprintf(stderr, "Could not get alsa volume.\n");
 533                 return smprintf(UNKNOWN_STR);
 534         }
 535         snd_mixer_selem_id_set_name(vol_info, ALSA_CHANNEL);
 536         snd_mixer_selem_id_set_name(mute_info, ALSA_CHANNEL);
 537         pcm_mixer = snd_mixer_find_selem(handle, vol_info);
 538         mas_mixer = snd_mixer_find_selem(handle, mute_info);
 539
 540         snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, &min, &max);
 541         snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, SND_MIXER_SCHN_MONO, &vol);
 542         snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO, &mute);
 543
 544         if (vol_info)
 545                 snd_mixer_selem_id_free(vol_info);
 546         if (mute_info)
 547                 snd_mixer_selem_id_free(mute_info);
 548         if (handle)
 549                 snd_mixer_close(handle);
 550
 551         if (!mute)
 552                 return smprintf("mute");
 553         else
 554                 return smprintf("%d%%", (vol * 100) / max);
 555 }
 556
 557 static char *
 558 wifi_perc(const char *wificard)
 559 {
 560         int strength;
 561         char buf[255];
 562         char *datastart;
 563         char path[64];
 564         char status[5];
 565         char needle[strlen(wificard)+2];
 566         FILE *fp = fopen(path, "r");
 567
 568         strlcpy(path, "/sys/class/net/", sizeof(path));
 569         strlcat(path, wificard, sizeof(path));
 570         strlcat(path, "/operstate", sizeof(path));
 571
 572         if(fp == NULL) {
 573                 fprintf(stderr, "Error opening wifi operstate file: %s\n",
 574                                                         strerror(errno));
 575                 return smprintf(UNKNOWN_STR);
 576         }
 577
 578         fgets(status, 5, fp);
 579         fclose(fp);
 580         if(strcmp(status, "up\n") != 0)
 581                 return smprintf(UNKNOWN_STR);
 582
 583         fp = fopen("/proc/net/wireless", "r");
 584         if (fp == NULL) {
 585                 fprintf(stderr, "Error opening wireless file: %s\n",
 586                                                 strerror(errno));
 587                 return smprintf(UNKNOWN_STR);
 588         }
 589
 590         strlcpy(needle, wificard, sizeof(needle));
 591         strlcat(needle, ":", sizeof(needle));
 592         fgets(buf, sizeof(buf), fp);
 593         fgets(buf, sizeof(buf), fp);
 594         fgets(buf, sizeof(buf), fp);
 595
 596         datastart = strstr(buf, needle);
 597         if (datastart != NULL) {
 598                 datastart = strstr(buf, ":");
 599                 sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &strength);
 600         }
 601
 602         fclose(fp);
 603         return smprintf("%d%%", strength);
 604 }
 605
 606 static char *
 607 wifi_essid(const char *wificard)
 608 {
 609         char id[IW_ESSID_MAX_SIZE+1];
 610         int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
 611         struct iwreq wreq;
 612
 613         memset(&wreq, 0, sizeof(struct iwreq));
 614         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 615         sprintf(wreq.ifr_name, wificard);
 616         if(sockfd == -1) {
 617                 fprintf(stderr, "Cannot open socket for interface: %s: %s\n",
 618                                                 wificard, strerror(errno));
 619                 return smprintf(UNKNOWN_STR);
 620         }
 621         wreq.u.essid.pointer = id;
 622         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 623                 fprintf(stderr, "Get ESSID ioctl failed for interface %s: %s\n",
 624                                                 wificard, strerror(errno));
 625                 return smprintf(UNKNOWN_STR);
 626         }
 627
 628         if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
 629                 return smprintf(UNKNOWN_STR);
 630         else
 631                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 632 }
 633
 634 int
 635 main(void)
 636 {
 637         size_t i;
 638         char status_string[4096];
 639         char *res, *element;
 640         struct arg argument;
 641
 642         dpy = XOpenDisplay(0x0);
 643         if (!dpy) {
 644                 fprintf(stderr, "Cannot open display!\n");
 645                 exit(1);
 646         }
 647
 648         for (;;) {
 649                 memset(status_string, 0, sizeof(status_string));
 650                 for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 651                         argument = args[i];
 652                         if (argument.args == NULL)
 653                                 res = argument.func();
 654                         else
 655                                 res = argument.func(argument.args);
 656                         element = smprintf(argument.format, res);
 657                         if (element == NULL) {
 658                                 element = smprintf(UNKNOWN_STR);
 659                                 fprintf(stderr, "Failed to format output.\n");
 660                         }
 661                         strlcat(status_string, element, sizeof(status_string));
 662                         free(res);
 663                         free(element);
 664                 }
 665
 666                 setstatus(status_string);
 667                 sleep(UPDATE_INTERVAL -1);
 668         }
 669
 670         XCloseDisplay(dpy);
 671         return 0;
 672 }