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[slstatus.git] / 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 <locale.h>
10 #include <netdb.h>
11 #include <pwd.h>
12 #include <signal.h>
13 #include <stdarg.h>
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <string.h>
17 #include <sys/ioctl.h>
18 #include <sys/stat.h>
19 #include <sys/statvfs.h>
20 #include <sys/socket.h>
21 #include <sys/sysinfo.h>
22 #include <sys/types.h>
23 #include <time.h>
24 #include <unistd.h>
25 #include <X11/Xlib.h>
26
27 #undef strlcat
28 #undef strlcpy
29
30 #include "extern/arg.h"
31 #include "extern/strlcat.h"
32 #include "extern/strlcpy.h"
33 #include "extern/concat.h"
34
35 struct arg {
36 char *(*func)();
37 const char *fmt;
38 const char *args;
39 };
40
41 static char *smprintf(const char *fmt, ...);
42 static char *battery_perc(const char *bat);
43 static char *battery_state(const char *bat);
44 static char *cpu_perc(void);
45 static char *datetime(const char *fmt);
46 static char *disk_free(const char *mnt);
47 static char *disk_perc(const char *mnt);
48 static char *disk_total(const char *mnt);
49 static char *disk_used(const char *mnt);
50 static char *entropy(void);
51 static char *gid(void);
52 static char *hostname(void);
53 static char *ip(const char *iface);
54 static char *load_avg(void);
55 static char *ram_free(void);
56 static char *ram_perc(void);
57 static char *ram_used(void);
58 static char *ram_total(void);
59 static char *run_command(const char *cmd);
60 static char *swap_free(void);
61 static char *swap_perc(void);
62 static char *swap_used(void);
63 static char *swap_total(void);
64 static char *temp(const char *file);
65 static char *uid(void);
66 static char *uptime(void);
67 static char *username(void);
68 static char *vol_perc(const char *card);
69 static char *wifi_perc(const char *iface);
70 static char *wifi_essid(const char *iface);
71 static void set_status(const char *str);
72 static void sighandler(const int signo);
73 static void usage(void);
74
75 char *argv0;
76 char concat[];
77 static unsigned short int delay;
78 static unsigned short int done;
79 static unsigned short int dflag, oflag;
80 static Display *dpy;
81
82 #include "config.h"
83
84 static char *
85 smprintf(const char *fmt, ...)
86 {
87 va_list ap;
88 char *ret;
89 int len;
90
91 va_start(ap, fmt);
92 len = vsnprintf(NULL, 0, fmt, ap);
93 va_end(ap);
94
95 ret = malloc(++len);
96 if (ret == NULL) {
97 err(1, "malloc");
98 }
99
100 va_start(ap, fmt);
101 vsnprintf(ret, len, fmt, ap);
102 va_end(ap);
103
104 return ret;
105 }
106
107 static char *
108 battery_perc(const char *bat)
109 {
110 int perc;
111 FILE *fp;
112
113 ccat(3, "/sys/class/power_supply/", bat, "/capacity");
114 fp = fopen(concat, "r");
115 if (fp == NULL) {
116 warn("Failed to open file %s", concat);
117 return smprintf(UNKNOWN_STR);
118 }
119 fscanf(fp, "%i", &perc);
120 fclose(fp);
121
122 return smprintf("%d%%", perc);
123 }
124
125 static char *
126 battery_state(const char *bat)
127 {
128 char state[12];
129 FILE *fp;
130
131 ccat(3, "/sys/class/power_supply/", bat, "/status");
132 fp = fopen(concat, "r");
133 if (fp == NULL) {
134 warn("Failed to open file %s", concat);
135 return smprintf(UNKNOWN_STR);
136 }
137 fscanf(fp, "%12s", state);
138 fclose(fp);
139
140 if (strcmp(state, "Charging") == 0) {
141 return smprintf("+");
142 } else if (strcmp(state, "Discharging") == 0) {
143 return smprintf("-");
144 } else if (strcmp(state, "Full") == 0) {
145 return smprintf("=");
146 } else {
147 return smprintf("?");
148 }
149 }
150
151 static char *
152 cpu_perc(void)
153 {
154 int perc;
155 long double a[4], b[4];
156 FILE *fp;
157
158 fp = fopen("/proc/stat", "r");
159 if (fp == NULL) {
160 warn("Failed to open file /proc/stat");
161 return smprintf(UNKNOWN_STR);
162 }
163 fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
164 fclose(fp);
165
166 delay = (UPDATE_INTERVAL - (UPDATE_INTERVAL - 1));
167 sleep(delay);
168
169 fp = fopen("/proc/stat", "r");
170 if (fp == NULL) {
171 warn("Failed to open file /proc/stat");
172 return smprintf(UNKNOWN_STR);
173 }
174 fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
175 fclose(fp);
176
177 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]));
178 return smprintf("%d%%", perc);
179 }
180
181 static char *
182 datetime(const char *fmt)
183 {
184 time_t t;
185 char str[80];
186
187 t = time(NULL);
188 if (strftime(str, sizeof(str), fmt, localtime(&t)) == 0) {
189 return smprintf(UNKNOWN_STR);
190 }
191
192 return smprintf("%s", str);
193 }
194
195 static char *
196 disk_free(const char *mnt)
197 {
198 struct statvfs fs;
199
200 if (statvfs(mnt, &fs) < 0) {
201 warn("Failed to get filesystem info");
202 return smprintf(UNKNOWN_STR);
203 }
204
205 return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
206 }
207
208 static char *
209 disk_perc(const char *mnt)
210 {
211 int perc;
212 struct statvfs fs;
213
214 if (statvfs(mnt, &fs) < 0) {
215 warn("Failed to get filesystem info");
216 return smprintf(UNKNOWN_STR);
217 }
218
219 perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
220
221 return smprintf("%d%%", perc);
222 }
223
224 static char *
225 disk_total(const char *mnt)
226 {
227 struct statvfs fs;
228
229 if (statvfs(mnt, &fs) < 0) {
230 warn("Failed to get filesystem info");
231 return smprintf(UNKNOWN_STR);
232 }
233
234 return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
235 }
236
237 static char *
238 disk_used(const char *mnt)
239 {
240 struct statvfs fs;
241
242 if (statvfs(mnt, &fs) < 0) {
243 warn("Failed to get filesystem info");
244 return smprintf(UNKNOWN_STR);
245 }
246
247 return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
248 }
249
250 static char *
251 entropy(void)
252 {
253 int num;
254 FILE *fp;
255
256 fp= fopen("/proc/sys/kernel/random/entropy_avail", "r");
257 if (fp == NULL) {
258 warn("Failed to open file /proc/sys/kernel/random/entropy_avail");
259 return smprintf(UNKNOWN_STR);
260 }
261 fscanf(fp, "%d", &num);
262 fclose(fp);
263
264 return smprintf("%d", num);
265 }
266
267 static char *
268 gid(void)
269 {
270 return smprintf("%d", getgid());
271 }
272
273 static char *
274 hostname(void)
275 {
276 char buf[HOST_NAME_MAX];
277
278 if (gethostname(buf, sizeof(buf)) == -1) {
279 warn("hostname");
280 return smprintf(UNKNOWN_STR);
281 }
282
283 return smprintf("%s", buf);
284 }
285
286 static char *
287 ip(const char *iface)
288 {
289 struct ifaddrs *ifaddr, *ifa;
290 int s;
291 char host[NI_MAXHOST];
292
293 if (getifaddrs(&ifaddr) == -1) {
294 warn("Failed to get IP address for interface %s", iface);
295 return smprintf(UNKNOWN_STR);
296 }
297
298 for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
299 if (ifa->ifa_addr == NULL) {
300 continue;
301 }
302 s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
303 if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
304 if (s != 0) {
305 warnx("Failed to get IP address for interface %s", iface);
306 return smprintf(UNKNOWN_STR);
307 }
308 return smprintf("%s", host);
309 }
310 }
311
312 freeifaddrs(ifaddr);
313
314 return smprintf(UNKNOWN_STR);
315 }
316
317 static char *
318 load_avg(void)
319 {
320 double avgs[3];
321
322 if (getloadavg(avgs, 3) < 0) {
323 warnx("Failed to get the load avg");
324 return smprintf(UNKNOWN_STR);
325 }
326
327 return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
328 }
329
330 static char *
331 ram_free(void)
332 {
333 long free;
334 FILE *fp;
335
336 fp = fopen("/proc/meminfo", "r");
337 if (fp == NULL) {
338 warn("Failed to open file /proc/meminfo");
339 return smprintf(UNKNOWN_STR);
340 }
341 fscanf(fp, "MemFree: %ld kB\n", &free);
342 fclose(fp);
343
344 return smprintf("%f", (float)free / 1024 / 1024);
345 }
346
347 static char *
348 ram_perc(void)
349 {
350 long total, free, buffers, cached;
351 FILE *fp;
352
353 fp = fopen("/proc/meminfo", "r");
354 if (fp == NULL) {
355 warn("Failed to open file /proc/meminfo");
356 return smprintf(UNKNOWN_STR);
357 }
358 fscanf(fp, "MemTotal: %ld kB\n", &total);
359 fscanf(fp, "MemFree: %ld kB\n", &free);
360 fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
361 fscanf(fp, "Cached: %ld kB\n", &cached);
362 fclose(fp);
363
364 return smprintf("%d%%", 100 * ((total - free) - (buffers + cached)) / total);
365 }
366
367 static char *
368 ram_total(void)
369 {
370 long total;
371 FILE *fp;
372
373 fp = fopen("/proc/meminfo", "r");
374 if (fp == NULL) {
375 warn("Failed to open file /proc/meminfo");
376 return smprintf(UNKNOWN_STR);
377 }
378 fscanf(fp, "MemTotal: %ld kB\n", &total);
379 fclose(fp);
380
381 return smprintf("%f", (float)total / 1024 / 1024);
382 }
383
384 static char *
385 ram_used(void)
386 {
387 long free, total, buffers, cached;
388 FILE *fp;
389
390 fp = fopen("/proc/meminfo", "r");
391 if (fp == NULL) {
392 warn("Failed to open file /proc/meminfo");
393 return smprintf(UNKNOWN_STR);
394 }
395 fscanf(fp, "MemTotal: %ld kB\n", &total);
396 fscanf(fp, "MemFree: %ld kB\n", &free);
397 fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
398 fscanf(fp, "Cached: %ld kB\n", &cached);
399 fclose(fp);
400
401 return smprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024);
402 }
403
404 static char *
405 run_command(const char *cmd)
406 {
407 FILE *fp;
408 char buf[1024] = "n/a";
409
410 fp = popen(cmd, "r");
411 if (fp == NULL) {
412 warn("Failed to get command output for %s", cmd);
413 return smprintf(UNKNOWN_STR);
414 }
415 fgets(buf, sizeof(buf)-1, fp);
416 pclose(fp);
417
418 buf[strlen(buf)] = '\0';
419 strtok(buf, "\n");
420
421 return smprintf("%s", buf);
422 }
423
424 static char *
425 swap_free(void)
426 {
427 long free;
428 FILE *fp;
429 char buf[2048];
430 size_t bytes_read;
431 char *match;
432
433 fp = fopen("/proc/meminfo", "r");
434 if (fp == NULL) {
435 warn("Failed to open file /proc/meminfo");
436 return smprintf(UNKNOWN_STR);
437 }
438 bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
439 buf[bytes_read] = '\0';
440 fclose(fp);
441 if (bytes_read == 0 || bytes_read == sizeof(buf)) {
442 warn("Failed to read /proc/meminfo\n");
443 return smprintf(UNKNOWN_STR);
444 }
445
446 match = strstr(buf, "SwapFree");
447 sscanf(match, "SwapFree: %ld kB\n", &free);
448
449 return smprintf("%f", (float)free / 1024 / 1024);
450 }
451
452 static char *
453 swap_perc(void)
454 {
455 long total, free, cached;
456 FILE *fp;
457 char buf[2048];
458 size_t bytes_read;
459 char *match;
460
461 fp = fopen("/proc/meminfo", "r");
462 if (fp == NULL) {
463 warn("Failed to open file /proc/meminfo");
464 return smprintf(UNKNOWN_STR);
465 }
466 bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
467 buf[bytes_read] = '\0';
468 fclose(fp);
469 if (bytes_read == 0 || bytes_read == sizeof(buf)) {
470 warn("Failed to read /proc/meminfo\n");
471 return smprintf(UNKNOWN_STR);
472 }
473
474 match = strstr(buf, "SwapCached");
475 sscanf(match, "SwapCached: %ld kB\n", &cached);
476
477 match = strstr(buf, "SwapTotal");
478 sscanf(match, "SwapTotal: %ld kB\n", &total);
479
480 match = strstr(buf, "SwapFree");
481 sscanf(match, "SwapFree: %ld kB\n", &free);
482
483 return smprintf("%d%%", 100 * (total - free - cached) / total);
484 }
485
486 static char *
487 swap_total(void)
488 {
489 long total;
490 FILE *fp;
491 char buf[2048];
492 size_t bytes_read;
493 char *match;
494
495 fp = fopen("/proc/meminfo", "r");
496 if (fp == NULL) {
497 warn("Failed to open file /proc/meminfo");
498 return smprintf(UNKNOWN_STR);
499 }
500 bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
501 buf[bytes_read] = '\0';
502 fclose(fp);
503 if (bytes_read == 0 || bytes_read == sizeof(buf)) {
504 warn("Failed to read /proc/meminfo\n");
505 return smprintf(UNKNOWN_STR);
506 }
507
508 match = strstr(buf, "SwapTotal");
509 sscanf(match, "SwapTotal: %ld kB\n", &total);
510
511 return smprintf("%f", (float)total / 1024 / 1024);
512 }
513
514 static char *
515 swap_used(void)
516 {
517 long total, free, cached;
518 FILE *fp;
519 char buf[2048];
520 size_t bytes_read;
521 char *match;
522
523 fp = fopen("/proc/meminfo", "r");
524 if (fp == NULL) {
525 warn("Failed to open file /proc/meminfo");
526 return smprintf(UNKNOWN_STR);
527 }
528 bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
529 buf[bytes_read] = '\0';
530 fclose(fp);
531 if (bytes_read == 0 || bytes_read == sizeof(buf)) {
532 warn("Failed to read /proc/meminfo\n");
533 return smprintf(UNKNOWN_STR);
534 }
535
536 match = strstr(buf, "SwapCached");
537 sscanf(match, "SwapCached: %ld kB\n", &cached);
538
539 match = strstr(buf, "SwapTotal");
540 sscanf(match, "SwapTotal: %ld kB\n", &total);
541
542 match = strstr(buf, "SwapFree");
543 sscanf(match, "SwapFree: %ld kB\n", &free);
544
545 return smprintf("%f", (float)(total - free - cached) / 1024 / 1024);
546 }
547
548 static char *
549 temp(const char *file)
550 {
551 int temp;
552 FILE *fp;
553
554 fp = fopen(file, "r");
555 if (fp == NULL) {
556 warn("Failed to open file %s", file);
557 return smprintf(UNKNOWN_STR);
558 }
559 fscanf(fp, "%d", &temp);
560 fclose(fp);
561
562 return smprintf("%d°C", temp / 1000);
563 }
564
565 static char *
566 uptime(void)
567 {
568 struct sysinfo info;
569 int h = 0;
570 int m = 0;
571
572 sysinfo(&info);
573 h = info.uptime / 3600;
574 m = (info.uptime - h * 3600 ) / 60;
575
576 return smprintf("%dh %dm", h, m);
577 }
578
579 static char *
580 username(void)
581 {
582 uid_t uid = geteuid();
583 struct passwd *pw = getpwuid(uid);
584
585 if (pw == NULL) {
586 warn("Failed to get username");
587 return smprintf(UNKNOWN_STR);
588 }
589
590 return smprintf("%s", pw->pw_name);
591 }
592
593 static char *
594 uid(void)
595 {
596 return smprintf("%d", geteuid());
597 }
598
599
600 static char *
601 vol_perc(const char *card)
602 {
603 int mute;
604 long int vol, max, min;
605 snd_mixer_t *handle;
606 snd_mixer_elem_t *elem;
607 snd_mixer_selem_id_t *s_elem;
608
609 snd_mixer_open(&handle, 0);
610 snd_mixer_attach(handle, card);
611 snd_mixer_selem_register(handle, NULL, NULL);
612 snd_mixer_load(handle);
613 snd_mixer_selem_id_malloc(&s_elem);
614 snd_mixer_selem_id_set_name(s_elem, "Master");
615 elem = snd_mixer_find_selem(handle, s_elem);
616
617 if (elem == NULL) {
618 snd_mixer_selem_id_free(s_elem);
619 snd_mixer_close(handle);
620 warn("Failed to get volume percentage for %s", card);
621 return smprintf(UNKNOWN_STR);
622 }
623
624 snd_mixer_handle_events(handle);
625 snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
626 snd_mixer_selem_get_playback_volume(elem, 0, &vol);
627 snd_mixer_selem_get_playback_switch(elem, 0, &mute);
628
629 snd_mixer_selem_id_free(s_elem);
630 snd_mixer_close(handle);
631
632 if (!mute)
633 return smprintf("mute");
634 else if (max == 0)
635 return smprintf("0%%");
636 else
637 return smprintf("%lu%%", ((uint_fast16_t)(vol * 100) / max));
638 }
639
640 static char *
641 wifi_perc(const char *iface)
642 {
643 int perc;
644 char buf[255];
645 char *datastart;
646 char status[5];
647 FILE *fp;
648
649 ccat(3, "/sys/class/net/", iface, "/operstate");
650 fp = fopen(concat, "r");
651 if (fp == NULL) {
652 warn("Failed to open file %s", concat);
653 return smprintf(UNKNOWN_STR);
654 }
655 fgets(status, 5, fp);
656 fclose(fp);
657 if(strcmp(status, "up\n") != 0) {
658 return smprintf(UNKNOWN_STR);
659 }
660
661 fp = fopen("/proc/net/wireless", "r");
662 if (fp == NULL) {
663 warn("Failed to open file /proc/net/wireless");
664 return smprintf(UNKNOWN_STR);
665 }
666 ccat(2, iface, ":");
667 fgets(buf, sizeof(buf), fp);
668 fgets(buf, sizeof(buf), fp);
669 fgets(buf, sizeof(buf), fp);
670 fclose(fp);
671
672 datastart = strstr(buf, concat);
673 if (datastart != NULL) {
674 datastart = strstr(buf, ":");
675 sscanf(datastart + 1, " %*d %d %*d %*d %*d %*d %*d %*d %*d %*d", &perc);
676 }
677
678 return smprintf("%d%%", perc);
679 }
680
681 static char *
682 wifi_essid(const char *iface)
683 {
684 char id[IW_ESSID_MAX_SIZE+1];
685 int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
686 struct iwreq wreq;
687
688 memset(&wreq, 0, sizeof(struct iwreq));
689 wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
690 sprintf(wreq.ifr_name, iface);
691 if (sockfd == -1) {
692 warn("Failed to get ESSID for interface %s", iface);
693 return smprintf(UNKNOWN_STR);
694 }
695 wreq.u.essid.pointer = id;
696 if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
697 warn("Failed to get ESSID for interface %s", iface);
698 return smprintf(UNKNOWN_STR);
699 }
700
701 close(sockfd);
702
703 if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
704 return smprintf(UNKNOWN_STR);
705 else
706 return smprintf("%s", (char *)wreq.u.essid.pointer);
707 }
708
709 static void
710 set_status(const char *str)
711 {
712 XStoreName(dpy, DefaultRootWindow(dpy), str);
713 XSync(dpy, False);
714 }
715
716 static void
717 sighandler(const int signo)
718 {
719 if (signo == SIGTERM || signo == SIGINT) {
720 done = 1;
721 }
722 }
723
724 static void
725 usage(void)
726 {
727 fprintf(stderr, "usage: %s [-dhov]\n", argv0);
728 exit(1);
729 }
730
731 int
732 main(int argc, char *argv[])
733 {
734 unsigned short int i;
735 char status_string[4096];
736 char *res, *element;
737 struct arg argument;
738 struct sigaction act;
739
740 ARGBEGIN {
741 case 'd':
742 dflag = 1;
743 break;
744 case 'o':
745 oflag = 1;
746 break;
747 case 'v':
748 printf("slstatus %s (C) 2016 slstatus engineers\n", VERSION);
749 return 0;
750 default:
751 usage();
752 } ARGEND
753
754 if (dflag && oflag) {
755 usage();
756 }
757 if (dflag && daemon(1, 1) < 0) {
758 err(1, "daemon");
759 }
760
761 memset(&act, 0, sizeof(act));
762 act.sa_handler = sighandler;
763 sigaction(SIGINT, &act, 0);
764 sigaction(SIGTERM, &act, 0);
765
766 if (!oflag) {
767 dpy = XOpenDisplay(NULL);
768 }
769
770 setlocale(LC_ALL, "");
771
772 while (!done) {
773 status_string[0] = '\0';
774
775 for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
776 argument = args[i];
777 if (argument.args == NULL) {
778 res = argument.func();
779 } else {
780 res = argument.func(argument.args);
781 }
782 element = smprintf(argument.fmt, res);
783 if (element == NULL) {
784 element = smprintf(UNKNOWN_STR);
785 warnx("Failed to format output");
786 }
787 strlcat(status_string, element, sizeof(status_string));
788 free(res);
789 free(element);
790 }
791
792 if (!oflag) {
793 set_status(status_string);
794 } else {
795 printf("%s\n", status_string);
796 }
797
798 /*
799 * subtract delay time spend in function
800 * calls from the actual global delay time
801 */
802 sleep(UPDATE_INTERVAL - delay);
803 delay = 0;
804 }
805
806 if (!oflag) {
807 set_status(NULL);
808 XCloseDisplay(dpy);
809 }
810
811 return 0;
812 }