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
 154         return smprintf("%d%%", perc);
 155 }
 156
 157 static char *
 158 datetime(const char *timeformat)
 159 {
 160         time_t t;
 161         char timestr[80];
 162
 163         t = time(NULL);
 164         if (strftime(timestr, sizeof(timestr), timeformat, localtime(&t)) == 0)
 165                 return smprintf(UNKNOWN_STR);
 166
 167         return smprintf("%s", timestr);
 168 }
 169
 170 static char *
 171 disk_free(const char *mountpoint)
 172 {
 173         struct statvfs fs;
 174
 175         if (statvfs(mountpoint, &fs) < 0) {
 176                 warn("Could not get filesystem info");
 177                 return smprintf(UNKNOWN_STR);
 178         }
 179
 180         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
 181 }
 182
 183 static char *
 184 disk_perc(const char *mountpoint)
 185 {
 186         int perc = 0;
 187         struct statvfs fs;
 188
 189         if (statvfs(mountpoint, &fs) < 0) {
 190                 warn("Could not get filesystem info");
 191                 return smprintf(UNKNOWN_STR);
 192         }
 193
 194         perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
 195
 196         return smprintf("%d%%", perc);
 197 }
 198
 199 static char *
 200 disk_total(const char *mountpoint)
 201 {
 202         struct statvfs fs;
 203
 204         if (statvfs(mountpoint, &fs) < 0) {
 205                 warn("Could not get filesystem info");
 206                 return smprintf(UNKNOWN_STR);
 207         }
 208
 209         return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
 210 }
 211
 212 static char *
 213 disk_used(const char *mountpoint)
 214 {
 215         struct statvfs fs;
 216
 217         if (statvfs(mountpoint, &fs) < 0) {
 218                 warn("Could not get filesystem info");
 219                 return smprintf(UNKNOWN_STR);
 220         }
 221
 222         return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
 223 }
 224
 225 static char *
 226 entropy(void)
 227 {
 228         int entropy = 0;
 229         FILE *fp = fopen("/proc/sys/kernel/random/entropy_avail", "r");
 230
 231         if (fp == NULL) {
 232                 warn("Could not open entropy file");
 233                 return smprintf(UNKNOWN_STR);
 234         }
 235
 236         fscanf(fp, "%d", &entropy);
 237         fclose(fp);
 238
 239         return smprintf("%d", entropy);
 240 }
 241
 242 static char *
 243 gid(void)
 244 {
 245         return smprintf("%d", getgid());
 246 }
 247
 248 static char *
 249 hostname(void)
 250 {
 251         char hostname[HOST_NAME_MAX];
 252         FILE *fp = fopen("/proc/sys/kernel/hostname", "r");
 253
 254         if (fp == NULL) {
 255                 warn("Could not open hostname file");
 256                 return smprintf(UNKNOWN_STR);
 257         }
 258
 259         fgets(hostname, sizeof(hostname), fp);
 260         /* FIXME: needs improvement */
 261         memset(&hostname[strlen(hostname)-1], '\0',
 262                 sizeof(hostname) - strlen(hostname));
 263         fclose(fp);
 264
 265         return smprintf("%s", hostname);
 266 }
 267
 268 static char *
 269 ip(const char *interface)
 270 {
 271         struct ifaddrs *ifaddr, *ifa;
 272         int s;
 273         char host[NI_MAXHOST];
 274
 275         if (getifaddrs(&ifaddr) == -1) {
 276                 warn("Error getting IP address");
 277                 return smprintf(UNKNOWN_STR);
 278         }
 279
 280         /* get the ip address */
 281         for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
 282                 if (ifa->ifa_addr == NULL)
 283                         continue;
 284
 285                 s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST,
 286                                                                 NULL, 0, NI_NUMERICHOST);
 287
 288                 if ((strcmp(ifa->ifa_name, interface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
 289                         if (s != 0) {
 290                                 warnx("Error getting IP address.");
 291                                 return smprintf(UNKNOWN_STR);
 292                         }
 293                         return smprintf("%s", host);
 294                 }
 295         }
 296
 297         /* free the address */
 298         freeifaddrs(ifaddr);
 299
 300         return smprintf(UNKNOWN_STR);
 301 }
 302
 303 static char *
 304 load_avg(void)
 305 {
 306         double avgs[3];
 307
 308         if (getloadavg(avgs, 3) < 0) {
 309                 warnx("Error getting load avg.");
 310                 return smprintf(UNKNOWN_STR);
 311         }
 312
 313         return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
 314 }
 315
 316 static char *
 317 ram_free(void)
 318 {
 319         long free;
 320         FILE *fp = fopen("/proc/meminfo", "r");
 321
 322         if (fp == NULL) {
 323                 warn("Error opening meminfo file");
 324                 return smprintf(UNKNOWN_STR);
 325         }
 326
 327         fscanf(fp, "MemFree: %ld kB\n", &free);
 328         fclose(fp);
 329
 330         return smprintf("%f", (float)free / 1024 / 1024);
 331 }
 332
 333 static char *
 334 ram_perc(void)
 335 {
 336         int perc;
 337         long total, free, buffers, cached;
 338         FILE *fp = fopen("/proc/meminfo", "r");
 339
 340         if (fp == NULL) {
 341                 warn("Error opening meminfo file");
 342                 return smprintf(UNKNOWN_STR);
 343         }
 344
 345         fscanf(fp, "MemTotal: %ld kB\n", &total);
 346         fscanf(fp, "MemFree: %ld kB\n", &free);
 347         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 348         fscanf(fp, "Cached: %ld kB\n", &cached);
 349
 350         fclose(fp);
 351         perc = 100 * ((total - free) - (buffers + cached)) / total;
 352
 353         return smprintf("%d%%", perc);
 354 }
 355
 356 static char *
 357 ram_total(void)
 358 {
 359         long total;
 360         FILE *fp = fopen("/proc/meminfo", "r");
 361
 362         if (fp == NULL) {
 363                 warn("Error opening meminfo file");
 364                 return smprintf(UNKNOWN_STR);
 365         }
 366
 367         fscanf(fp, "MemTotal: %ld kB\n", &total);
 368         fclose(fp);
 369
 370         return smprintf("%f", (float)total / 1024 / 1024);
 371 }
 372
 373 static char *
 374 ram_used(void)
 375 {
 376         long free, total, buffers, cached, used;
 377         FILE *fp = fopen("/proc/meminfo", "r");
 378
 379         if (fp == NULL) {
 380                 warn("Error opening meminfo file");
 381                 return smprintf(UNKNOWN_STR);
 382         }
 383
 384         fscanf(fp, "MemTotal: %ld kB\n", &total);
 385         fscanf(fp, "MemFree: %ld kB\n", &free);
 386         fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
 387         fscanf(fp, "Cached: %ld kB\n", &cached);
 388
 389         fclose(fp);
 390         used = total - free - buffers - cached;
 391
 392         return smprintf("%f", (float)used / 1024 / 1024);
 393 }
 394
 395 static char *
 396 run_command(const char* command)
 397 {
 398         int good;
 399         FILE *fp = popen(command, "r");
 400         char buffer[64] = "";
 401
 402         if (fp == NULL) {
 403                 warn("Could not get command output for: %s", command);
 404                 return smprintf(UNKNOWN_STR);
 405         }
 406
 407         fgets(buffer, sizeof(buffer)-1, fp);
 408         pclose(fp);
 409         for (int i = 0 ; i != sizeof(buffer); i++) {
 410                 if (buffer[i] == '\0') {
 411                         good = 1;
 412                         break;
 413                 }
 414         }
 415         if (good)
 416                 buffer[strlen(buffer)-1] = '\0';
 417
 418         return smprintf("%s", buffer);
 419 }
 420
 421 static char *
 422 temp(const char *file)
 423 {
 424         int temperature;
 425         FILE *fp = fopen(file, "r");
 426
 427         if (fp == NULL) {
 428                 warn("Could not open temperature file");
 429                 return smprintf(UNKNOWN_STR);
 430         }
 431
 432         fscanf(fp, "%d", &temperature);
 433         fclose(fp);
 434
 435         return smprintf("%d°C", temperature / 1000);
 436 }
 437
 438 static char *
 439 uptime(void)
 440 {
 441         struct sysinfo info;
 442         int hours = 0;
 443         int minutes = 0;
 444
 445         sysinfo(&info);
 446         hours = info.uptime / 3600;
 447         minutes = (info.uptime - hours * 3600 ) / 60;
 448
 449         return smprintf("%dh %dm", hours, minutes);
 450 }
 451
 452 static char *
 453 username(void)
 454 {
 455         uid_t uid = geteuid();
 456         struct passwd *pw = getpwuid(uid);
 457
 458         if (pw == NULL)
 459                 return smprintf("%s", pw->pw_name);
 460
 461         warn("Could not get username");
 462         return smprintf(UNKNOWN_STR);
 463 }
 464
 465 static char *
 466 uid(void)
 467 {
 468         return smprintf("%d", geteuid());
 469 }
 470
 471
 472 static char *
 473 vol_perc(const char *snd_card)
 474 { /* thanks to botika for this function */
 475         long int vol, max, min;
 476         snd_mixer_t *handle;
 477         snd_mixer_elem_t *elem;
 478         snd_mixer_selem_id_t *s_elem;
 479
 480         snd_mixer_open(&handle, 0);
 481         snd_mixer_attach(handle, "default");
 482         snd_mixer_selem_register(handle, NULL, NULL);
 483         snd_mixer_load(handle);
 484         snd_mixer_selem_id_malloc(&s_elem);
 485         snd_mixer_selem_id_set_name(s_elem, snd_card);
 486         elem = snd_mixer_find_selem(handle, s_elem);
 487
 488         if (elem == NULL) {
 489                 snd_mixer_selem_id_free(s_elem);
 490                 snd_mixer_close(handle);
 491                 perror("alsa error");
 492                 return smprintf(UNKNOWN_STR);
 493         }
 494
 495         snd_mixer_handle_events(handle);
 496         snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
 497         snd_mixer_selem_get_playback_volume(elem, 0, &vol);
 498
 499         snd_mixer_selem_id_free(s_elem);
 500         snd_mixer_close(handle);
 501
 502         return smprintf("%d", (vol * 100) / max);
 503 }
 504
 505 static char *
 506 wifi_perc(const char *wificard)
 507 {
 508         int strength;
 509         char buf[255];
 510         char *datastart;
 511         char status[5];
 512         FILE *fp;
 513
 514         ccat(3, "/sys/class/net", wificard, "/operstate");
 515
 516         fp = fopen(concat, "r");
 517
 518         if(fp == NULL) {
 519                 warn("Error opening wifi operstate file");
 520                 return smprintf(UNKNOWN_STR);
 521         }
 522
 523         fgets(status, 5, fp);
 524         fclose(fp);
 525         if(strcmp(status, "up\n") != 0)
 526                 return smprintf(UNKNOWN_STR);
 527
 528         fp = fopen("/proc/net/wireless", "r");
 529         if (fp == NULL) {
 530                 warn("Error opening wireless file");
 531                 return smprintf(UNKNOWN_STR);
 532         }
 533
 534         ccat(2, wificard, ":");
 535         fgets(buf, sizeof(buf), fp);
 536         fgets(buf, sizeof(buf), fp);
 537         fgets(buf, sizeof(buf), fp);
 538
 539         datastart = strstr(buf, concat);
 540         if (datastart != NULL) {
 541                 datastart = strstr(buf, ":");
 542                 sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &strength);
 543         }
 544
 545         fclose(fp);
 546
 547         return smprintf("%d%%", strength);
 548 }
 549
 550 static char *
 551 wifi_essid(const char *wificard)
 552 {
 553         char id[IW_ESSID_MAX_SIZE+1];
 554         int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
 555         struct iwreq wreq;
 556
 557         memset(&wreq, 0, sizeof(struct iwreq));
 558         wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 559         sprintf(wreq.ifr_name, wificard);
 560         if(sockfd == -1) {
 561                 warn("Cannot open socket for interface: %s", wificard);
 562                 return smprintf(UNKNOWN_STR);
 563         }
 564         wreq.u.essid.pointer = id;
 565         if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
 566                 warn("Get ESSID ioctl failed for interface %s", wificard);
 567                 return smprintf(UNKNOWN_STR);
 568         }
 569
 570         if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
 571                 return smprintf(UNKNOWN_STR);
 572         else
 573                 return smprintf("%s", (char *)wreq.u.essid.pointer);
 574 }
 575
 576 int
 577 main(void)
 578 {
 579         size_t i;
 580         char status_string[4096];
 581         char *res, *element;
 582         struct arg argument;
 583
 584         dpy = XOpenDisplay(NULL);
 585
 586         for (;;) {
 587                 memset(status_string, 0, sizeof(status_string));
 588                 for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 589                         argument = args[i];
 590                         if (argument.args == NULL)
 591                                 res = argument.func();
 592                         else
 593                                 res = argument.func(argument.args);
 594                         element = smprintf(argument.format, res);
 595                         if (element == NULL) {
 596                                 element = smprintf(UNKNOWN_STR);
 597                                 warnx("Failed to format output.");
 598                         }
 599                         strlcat(status_string, element, sizeof(status_string));
 600                         free(res);
 601                         free(element);
 602                 }
 603                 XStoreName(dpy, DefaultRootWindow(dpy), status_string);
 604                 XSync(dpy, False);
 605         }
 606         XCloseDisplay(dpy);
 607
 608         return 0;
 609 }