X-Git-Url: https://git.xinqibao.xyz/slstatus.git/blobdiff_plain/3b6f51f8eb8f2f62b8817bb0cf654b7c77582ce7..dd5bfc3e518a705aba95569537e785bb0d6d7005:/slstatus.c diff --git a/slstatus.c b/slstatus.c index 467d32e..64da5cb 100644 --- a/slstatus.c +++ b/slstatus.c @@ -1,363 +1,141 @@ /* See LICENSE file for copyright and license details. */ - -/* global libraries */ -#include -#include +#include +#include #include #include #include #include -#include #include -/* local libraries */ -#include "config.h" +#include "arg.h" +#include "slstatus.h" +#include "util.h" -/* functions */ -void setstatus(char *str); -char *battery(); -char *cpu_temperature(); -char *cpu_usage(); -char *datetime(); -char *ram_usage(); -char *smprintf(char *fmt, ...); -char *volume(); -char *wifi_signal(); +struct arg { + const char *(*func)(); + const char *fmt; + const char *args; +}; -/* global variables */ +char buf[1024]; +static volatile sig_atomic_t done; static Display *dpy; -/* set statusbar (WM_NAME) */ -void -setstatus(char *str) -{ - XStoreName(dpy, DefaultRootWindow(dpy), str); - XSync(dpy, False); -} - -/* battery percentage */ -char * -battery() -{ - int battery_now, battery_full, battery_perc; - FILE *fp; - - /* open battery now file */ - if (!(fp = fopen(batterynowfile, "r"))) { - fprintf(stderr, "Error opening battery file."); - exit(1); - } - - /* read value */ - fscanf(fp, "%i", &battery_now); - - /* close battery now file */ - fclose(fp); - - /* open battery full file */ - if (!(fp = fopen(batteryfullfile, "r"))) { - fprintf(stderr, "Error opening battery file."); - exit(1); - } - - /* read value */ - fscanf(fp, "%i", &battery_full); - - /* close battery full file */ - fclose(fp); - - /* calculate percent */ - battery_perc = battery_now / (battery_full / 100); - - /* return batt_perc as string */ - return smprintf("%d%%", battery_perc); -} - -/* cpu temperature */ -char * -cpu_temperature() -{ - int temperature; - FILE *fp; - - /* open temperature file */ - if (!(fp = fopen(tempfile, "r"))) { - fprintf(stderr, "Could not open temperature file.\n"); - exit(1); - } - - /* extract temperature */ - fscanf(fp, "%d", &temperature); - - /* close temperature file */ - fclose(fp); - - /* return temperature in degrees */ - return smprintf("%d°C", temperature / 1000); -} - -/* cpu percentage */ -char * -cpu_usage() -{ - int cpu_perc; - long double a[4], b[4]; - FILE *fp; - - /* open stat file */ - if (!(fp = fopen("/proc/stat","r"))) { - fprintf(stderr, "Error opening stat file."); - exit(1); - } - - /* read values */ - fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]); - - /* close stat file */ - fclose(fp); - - /* wait a second (for avg values) */ - sleep(1); - - /* open stat file */ - if (!(fp = fopen("/proc/stat","r"))) { - fprintf(stderr, "Error opening stat file."); - exit(1); - } - - /* read values */ - fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]); - - /* close stat file */ - fclose(fp); - - /* calculate avg in this second */ - cpu_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])); - - /* return cpu_perc as string */ - return smprintf("%d%%", cpu_perc); -} - -/* date and time */ -char * -datetime() -{ - time_t tm; - size_t bufsize = 19; - char *buf = malloc(bufsize); - - /* get time in format */ - time(&tm); - if(!strftime(buf, bufsize, timeformat, localtime(&tm))) { - fprintf(stderr, "Strftime failed.\n"); - exit(1); - } - - /* return time */ - return buf; -} - -/* ram percentage */ -char * -ram_usage() -{ - int ram_perc; - long total, free, available; - FILE *fp; - - /* open meminfo file */ - if (!(fp = fopen("/proc/meminfo", "r"))) { - fprintf(stderr, "Error opening meminfo file."); - exit(1); - } - - /* read the values */ - fscanf(fp, "MemTotal: %ld kB\n", &total); - fscanf(fp, "MemFree: %ld kB\n", &free); - fscanf(fp, "MemAvailable: %ld kB\n", &available); - - /* close meminfo file */ - fclose(fp); - - /* calculate percentage */ - ram_perc = 100 * (total - available) / total; - - /* return ram_perc as string */ - return smprintf("%d%%",ram_perc); -} +#include "config.h" -/* smprintf function */ -char * -smprintf(char *fmt, ...) +static void +terminate(const int signo) { - va_list fmtargs; - char *ret; - int len; - - va_start(fmtargs, fmt); - len = vsnprintf(NULL, 0, fmt, fmtargs); - va_end(fmtargs); - - ret = malloc(++len); - if (ret == NULL) { - fprintf(stderr, "Malloc error."); - exit(1); - } - - va_start(fmtargs, fmt); - vsnprintf(ret, len, fmt, fmtargs); - va_end(fmtargs); - - return ret; + if (signo != SIGUSR1) + done = 1; } -/* alsa volume percentage */ -char * -volume() +static void +difftimespec(struct timespec *res, struct timespec *a, struct timespec *b) { - int mute = 0; - long vol = 0, max = 0, min = 0; - - /* get volume from alsa */ - snd_mixer_t *handle; - snd_mixer_elem_t *pcm_mixer, *mas_mixer; - snd_mixer_selem_id_t *vol_info, *mute_info; - snd_mixer_open(&handle, 0); - snd_mixer_attach(handle, soundcard); - snd_mixer_selem_register(handle, NULL, NULL); - snd_mixer_load(handle); - snd_mixer_selem_id_malloc(&vol_info); - snd_mixer_selem_id_malloc(&mute_info); - snd_mixer_selem_id_set_name(vol_info, channel); - snd_mixer_selem_id_set_name(mute_info, channel); - pcm_mixer = snd_mixer_find_selem(handle, vol_info); - mas_mixer = snd_mixer_find_selem(handle, mute_info); - snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, - &min, &max); - snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, - SND_MIXER_SCHN_MONO, &vol); - snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO, - &mute); - if (vol_info) - snd_mixer_selem_id_free(vol_info); - if (mute_info) - snd_mixer_selem_id_free(mute_info); - if (handle) - snd_mixer_close(handle); - - /* return the string (mute) */ - if (!mute) - return smprintf("mute"); - else - return smprintf("%d%%", (vol * 100) / max); + res->tv_sec = a->tv_sec - b->tv_sec - (a->tv_nsec < b->tv_nsec); + res->tv_nsec = a->tv_nsec - b->tv_nsec + + (a->tv_nsec < b->tv_nsec) * 1E9; } -/* wifi percentage */ -char * -wifi_signal() +static void +usage(void) { - int bufsize = 255; - int strength; - char buf[bufsize]; - char *datastart; - char path_start[16] = "/sys/class/net/"; - char path_end[11] = "/operstate"; - char path[32]; - char status[5]; - char needle[sizeof wificard + 1]; - FILE *fp; - - /* generate the path name */ - - memset(path, 0, sizeof path); - strcat(path, path_start); - strcat(path, wificard); - strcat(path, path_end); - - /* open wifi file */ - if(!(fp = fopen(path, "r"))) { - fprintf(stderr, "Error opening wifi operstate file."); - exit(1); - } - - /* read the status */ - fgets(status, 5, fp); - - /* close wifi file */ - fclose(fp); - - /* check if interface down */ - if(strcmp(status, "up\n") != 0){ - return "n/a"; - } - - /* open wifi file */ - if (!(fp = fopen("/proc/net/wireless", "r"))) { - fprintf(stderr, "Error opening wireless file."); - exit(1); - } - - /* extract the signal strength */ - strcpy(needle, wificard); - strcat(needle, ":"); - fgets(buf, bufsize, fp); - fgets(buf, bufsize, fp); - fgets(buf, bufsize, fp); - if ((datastart = strstr(buf, needle)) != NULL) { - datastart = strstr(buf, ":"); - sscanf(datastart + 1, " %*d %d %*d %*d %*d %*d %*d %*d %*d %*d", &strength); - } - - /* close wifi file */ - fclose(fp); - - /* return strength in percent */ - return smprintf("%d%%", strength); + die("usage: %s [-s] [-1]", argv0); } -/* main function */ int -main() +main(int argc, char *argv[]) { - char status[1024]; - - /* open display */ - if (!(dpy = XOpenDisplay(0x0))) { - fprintf(stderr, "Cannot open display!\n"); - exit(1); - } - - char *pWifi_signal = NULL; - char *pBattery = NULL; - char *pCpu_usage = NULL; - char *pCpu_temperature = NULL; - char *pRam_usage = NULL; - char *pVolume = NULL; - char *pDatetime = NULL; - - /* return status every second */ - for (;;) { - pWifi_signal = wifi_signal(); - pBattery = battery(); - pCpu_usage = cpu_usage(); - pCpu_temperature = cpu_temperature(); - pRam_usage = ram_usage(); - pVolume = volume(); - pDatetime = datetime(); - sprintf(status, FORMATSTRING, ARGUMENTS); - setstatus(status); - free(pWifi_signal); - free(pBattery); - free(pCpu_usage); - free(pCpu_temperature); - free(pRam_usage); - free(pVolume); - free(pDatetime); - } - - /* close display */ - XCloseDisplay(dpy); - - /* exit successfully */ - return 0; + struct sigaction act; + struct timespec start, current, diff, intspec, wait; + size_t i, len; + int sflag, ret; + char status[MAXLEN]; + const char *res; + + sflag = 0; + ARGBEGIN { + case '1': + done = 1; + /* fallthrough */ + case 's': + sflag = 1; + break; + default: + usage(); + } ARGEND + + if (argc) { + usage(); + } + + memset(&act, 0, sizeof(act)); + act.sa_handler = terminate; + sigaction(SIGINT, &act, NULL); + sigaction(SIGTERM, &act, NULL); + act.sa_flags |= SA_RESTART; + sigaction(SIGUSR1, &act, NULL); + + if (!sflag && !(dpy = XOpenDisplay(NULL))) { + die("XOpenDisplay: Failed to open display"); + } + + do { + if (clock_gettime(CLOCK_MONOTONIC, &start) < 0) { + die("clock_gettime:"); + } + + status[0] = '\0'; + for (i = len = 0; i < LEN(args); i++) { + if (!(res = args[i].func(args[i].args))) { + res = unknown_str; + } + if ((ret = esnprintf(status + len, sizeof(status) - len, + args[i].fmt, res)) < 0) { + break; + } + len += ret; + } + + if (sflag) { + puts(status); + fflush(stdout); + if (ferror(stdout)) + die("puts:"); + } else { + if (XStoreName(dpy, DefaultRootWindow(dpy), status) + < 0) { + die("XStoreName: Allocation failed"); + } + XFlush(dpy); + } + + if (!done) { + if (clock_gettime(CLOCK_MONOTONIC, ¤t) < 0) { + die("clock_gettime:"); + } + difftimespec(&diff, ¤t, &start); + + intspec.tv_sec = interval / 1000; + intspec.tv_nsec = (interval % 1000) * 1E6; + difftimespec(&wait, &intspec, &diff); + + if (wait.tv_sec >= 0) { + if (nanosleep(&wait, NULL) < 0 && + errno != EINTR) { + die("nanosleep:"); + } + } + } + } while (!done); + + if (!sflag) { + XStoreName(dpy, DefaultRootWindow(dpy), NULL); + if (XCloseDisplay(dpy) < 0) { + die("XCloseDisplay: Failed to close display"); + } + } + + return 0; }