X-Git-Url: https://git.xinqibao.xyz/slstatus.git/blobdiff_plain/526955ecda819d3471e04bef63df802edbdec63f..e1e1b1d79a9d274c861386ad14a5eacb6a6819f7:/slstatus.c diff --git a/slstatus.c b/slstatus.c index 6ca36e0..eb936e2 100644 --- a/slstatus.c +++ b/slstatus.c @@ -1,336 +1,840 @@ /* See LICENSE file for copyright and license details. */ - -/* global libraries */ -#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include #include #include #include #include +#include +#include +#include +#include +#include +#include +#include +#include #include #include #include -/* local libraries */ +#include "arg.h" + +#define LEN(x) (sizeof (x) / sizeof *(x)) + +struct arg { + const char *(*func)(); + const char *fmt; + const char *args; +}; + +static const char *battery_perc(const char *bat); +static const char *battery_power(const char *bat); +static const char *battery_state(const char *bat); +static const char *cpu_freq(void); +static const char *cpu_perc(void); +static const char *datetime(const char *fmt); +static const char *disk_free(const char *mnt); +static const char *disk_perc(const char *mnt); +static const char *disk_total(const char *mnt); +static const char *disk_used(const char *mnt); +static const char *entropy(void); +static const char *gid(void); +static const char *hostname(void); +static const char *ip(const char *iface); +static const char *kernel_release(void); +static const char *keyboard_indicators(void); +static const char *load_avg(void); +static const char *num_files(const char *dir); +static const char *ram_free(void); +static const char *ram_perc(void); +static const char *ram_used(void); +static const char *ram_total(void); +static const char *run_command(const char *cmd); +static const char *swap_free(void); +static const char *swap_perc(void); +static const char *swap_used(void); +static const char *swap_total(void); +static const char *temp(const char *file); +static const char *uid(void); +static const char *uptime(void); +static const char *username(void); +static const char *vol_perc(const char *card); +static const char *wifi_perc(const char *iface); +static const char *wifi_essid(const char *iface); + +char *argv0; +static unsigned short int done; +static Display *dpy; + #include "config.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(); - -/* global variables */ -static Display *dpy; +static char buf[MAXLEN]; -/* set statusbar (WM_NAME) */ -void -setstatus(char *str) +static const char * +bprintf(const char *fmt, ...) { - XStoreName(dpy, DefaultRootWindow(dpy), str); - XSync(dpy, False); + va_list ap; + size_t len; + + va_start(ap, fmt); + len = vsnprintf(buf, sizeof(buf) - 1, fmt, ap); + va_end(ap); + + if (len >= sizeof(buf)) + buf[sizeof(buf)-1] = '\0'; + + return buf; } -/* battery percentage */ -char * -battery() +int +pscanf(const char *path, const char *fmt, ...) { - int battery_now, battery_full, battery_perc; - FILE *fp; + FILE *fp; + va_list ap; + int n; + + if (!(fp = fopen(path, "r"))) { + warn("fopen %s: %s\n", path, strerror(errno)); + return -1; + } + va_start(ap, fmt); + n = vfscanf(fp, fmt, ap); + va_end(ap); + fclose(fp); + + return (n == EOF) ? -1 : n; +} - /* open battery now file */ - if (!(fp = fopen(batterynowfile, "r"))) { - fprintf(stderr, "Error opening battery file."); - exit(1); - } +static const char * +battery_perc(const char *bat) +{ + int perc; + char path[PATH_MAX]; - /* read value */ - fscanf(fp, "%i", &battery_now); + snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/capacity"); + return (pscanf(path, "%i", &perc) == 1) ? + bprintf("%d", perc) : unknown_str; +} - /* close battery now file */ - fclose(fp); +static const char * +battery_power(const char *bat) +{ + int watts; + char path[PATH_MAX]; - /* open battery full file */ - if (!(fp = fopen(batteryfullfile, "r"))) { - fprintf(stderr, "Error opening battery file."); - exit(1); - } + snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/power_now"); + return (pscanf(path, "%i", &watts) == 1) ? + bprintf("%d", (watts + 500000) / 1000000) : unknown_str; +} - /* read value */ - fscanf(fp, "%i", &battery_full); +static const char * +battery_state(const char *bat) +{ + struct { + char *state; + char *symbol; + } map[] = { + { "Charging", "+" }, + { "Discharging", "-" }, + { "Full", "=" }, + { "Unknown", "/" }, + }; + size_t i; + char path[PATH_MAX], state[12]; + + snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/status"); + if (pscanf(path, "%12s", state) != 1) { + return unknown_str; + } + + for (i = 0; i < LEN(map); i++) { + if (!strcmp(map[i].state, state)) { + break; + } + } + return (i == LEN(map)) ? "?" : map[i].symbol; +} - /* close battery full file */ - fclose(fp); +static const char * +cpu_freq(void) +{ + int freq; - /* calculate percent */ - battery_perc = battery_now / (battery_full / 100); + return (pscanf("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq", + "%i", &freq) != 1) ? + bprintf("%d", (freq + 500) / 1000) : unknown_str; +} + +static const char * +cpu_perc(void) +{ + struct timespec delay; + int perc; + long double a[4], b[4]; + + if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], + &a[3]) != 4) { + return unknown_str; + } - /* return batt_perc as string */ - return smprintf("%d%%", battery_perc); + delay.tv_sec = (interval / 2) / 1000; + delay.tv_nsec = ((interval / 2) % 1000) * 1000000; + nanosleep(&delay, NULL); + + if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], + &b[3]) != 4) { + return unknown_str; + } + + 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 bprintf("%d", perc); } -/* cpu temperature */ -char * -cpu_temperature() +static const char * +datetime(const char *fmt) { - int temperature; - FILE *fp; + time_t t; - /* open temperature file */ - if (!(fp = fopen(tempfile, "r"))) { - fprintf(stderr, "Could not open temperature file.\n"); - exit(1); - } + t = time(NULL); + if (strftime(buf, sizeof(buf), fmt, localtime(&t)) == 0) + return unknown_str; - /* extract temperature */ - fscanf(fp, "%d", &temperature); + return buf; +} - /* close temperature file */ - fclose(fp); +static const char * +disk_free(const char *mnt) +{ + struct statvfs fs; + + if (statvfs(mnt, &fs) < 0) { + warn("Failed to get filesystem info"); + return unknown_str; + } - /* return temperature in degrees */ - return smprintf("%d°C", temperature / 1000); + return bprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024); } -/* cpu percentage */ -char * -cpu_usage() +static const char * +disk_perc(const char *mnt) { - int cpu_perc; - long double a[4], b[4]; - FILE *fp; + int perc; + struct statvfs fs; - /* open stat file */ - if (!(fp = fopen("/proc/stat","r"))) { - fprintf(stderr, "Error opening stat file."); - exit(1); - } + if (statvfs(mnt, &fs) < 0) { + warn("Failed to get filesystem info"); + return unknown_str; + } - /* read values */ - fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]); + perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks)); - /* close stat file */ - fclose(fp); + return bprintf("%d", perc); +} - /* wait a second (for avg values) */ - sleep(1); +static const char * +disk_total(const char *mnt) +{ + struct statvfs fs; - /* open stat file */ - if (!(fp = fopen("/proc/stat","r"))) { - fprintf(stderr, "Error opening stat file."); - exit(1); - } + if (statvfs(mnt, &fs) < 0) { + warn("Failed to get filesystem info"); + return unknown_str; + } - /* read values */ - fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]); + return bprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024); +} - /* close stat file */ - fclose(fp); +static const char * +disk_used(const char *mnt) +{ + struct statvfs fs; - /* 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])); + if (statvfs(mnt, &fs) < 0) { + warn("Failed to get filesystem info"); + return unknown_str; + } - /* return cpu_perc as string */ - return smprintf("%d%%", cpu_perc); + return bprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024); } -/* date and time */ -char * -datetime() +static const char * +entropy(void) { - time_t tm; - size_t bufsize = 19; - char *buf = malloc(bufsize); + int num; - /* get time in format */ - time(&tm); - if(!strftime(buf, bufsize, timeformat, localtime(&tm))) { - fprintf(stderr, "Strftime failed.\n"); - exit(1); - } + return (pscanf("/proc/sys/kernel/random/entropy_avail", "%d", &num) == 1) ? + bprintf("%d", num) : unknown_str; +} - /* return time */ - return buf; +static const char * +gid(void) +{ + return bprintf("%d", getgid()); } -/* 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); -} - -/* smprintf function */ -char * -smprintf(char *fmt, ...) -{ - 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; -} - -/* alsa volume percentage */ -char * -volume() -{ - 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 "mute"; - else - return smprintf("%d%%", (vol * 100) / max); -} - -/* wifi percentage */ -char * -wifi_signal() -{ - 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]; - FILE *fp; - - /* generate the path name */ - 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 */ - fgets(buf, bufsize, fp); - fgets(buf, bufsize, fp); - fgets(buf, bufsize, fp); - if ((datastart = strstr(buf, "wlp3s0:")) != 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); -} - -/* main function */ -int -main() +static const char * +hostname(void) +{ + if (gethostname(buf, sizeof(buf)) == -1) { + warn("hostname"); + return unknown_str; + } + + return buf; +} + +static const char * +ip(const char *iface) +{ + struct ifaddrs *ifaddr, *ifa; + int s; + char host[NI_MAXHOST]; + + if (getifaddrs(&ifaddr) == -1) { + warn("Failed to get IP address for interface %s", iface); + return unknown_str; + } + + for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { + if (ifa->ifa_addr == NULL) { + continue; + } + s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST); + if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) { + if (s != 0) { + warnx("Failed to get IP address for interface %s", iface); + return unknown_str; + } + return bprintf("%s", host); + } + } + + freeifaddrs(ifaddr); + + return unknown_str; +} + +static const char * +kernel_release(void) +{ + struct utsname udata; + + if (uname(&udata) < 0) { + return unknown_str; + } + + return bprintf("%s", udata.release); +} + +static const char * +keyboard_indicators(void) +{ + Display *dpy = XOpenDisplay(NULL); + XKeyboardState state; + + if (dpy == NULL) { + warnx("XOpenDisplay failed"); + return unknown_str; + } + XGetKeyboardControl(dpy, &state); + XCloseDisplay(dpy); + + switch (state.led_mask) { + case 1: + return "c"; + case 2: + return "n"; + case 3: + return "cn"; + default: + return ""; + } +} + +static const char * +load_avg(void) +{ + double avgs[3]; + + if (getloadavg(avgs, 3) < 0) { + warnx("Failed to get the load avg"); + return unknown_str; + } + + return bprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]); +} + +static const char * +num_files(const char *dir) +{ + struct dirent *dp; + DIR *fd; + int num = 0; + + if ((fd = opendir(dir)) == NULL) { + warn("Failed to get number of files in directory %s", dir); + return unknown_str; + } + + while ((dp = readdir(fd)) != NULL) { + if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) + continue; /* skip self and parent */ + num++; + } + + closedir(fd); + + return bprintf("%d", num); +} + +static const char * +ram_free(void) +{ + long free; + + return (pscanf("/proc/meminfo", "MemFree: %ld kB\n", &free) == 1) ? + bprintf("%f", (float)free / 1024 / 1024) : unknown_str; +} + +static const char * +ram_perc(void) +{ + long total, free, buffers, cached; + + return (pscanf("/proc/meminfo", + "MemTotal: %ld kB\n" + "MemFree: %ld kB\n" + "MemAvailable: %ld kB\nBuffers: %ld kB\n" + "Cached: %ld kB\n", + &total, &free, &buffers, &buffers, &cached) == 5) ? + bprintf("%d", 100 * ((total - free) - (buffers + cached)) / total) : + unknown_str; +} + +static const char * +ram_total(void) { - char status[1024]; + long total; + + return (pscanf("/proc/meminfo", "MemTotal: %ld kB\n", &total) == 1) ? + bprintf("%f", (float)total / 1024 / 1024) : unknown_str; +} - /* open display */ - if (!(dpy = XOpenDisplay(0x0))) { - fprintf(stderr, "Cannot open display!\n"); - exit(1); - } +static const char * +ram_used(void) +{ + long total, free, buffers, cached; + + return (pscanf("/proc/meminfo", + "MemTotal: %ld kB\n" + "MemFree: %ld kB\n" + "MemAvailable: %ld kB\nBuffers: %ld kB\n" + "Cached: %ld kB\n", + &total, &free, &buffers, &buffers, &cached) == 5) ? + bprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024) : + unknown_str; +} - /* return status every second */ - for (;;) { - sprintf(status, FORMATSTRING, ARGUMENTS); - setstatus(status); - } +static const char * +run_command(const char *cmd) +{ + char *p; + FILE *fp; + + fp = popen(cmd, "r"); + if (fp == NULL) { + warn("Failed to get command output for %s", cmd); + return unknown_str; + } + p = fgets(buf, sizeof(buf) - 1, fp); + pclose(fp); + if (!p) + return unknown_str; + if ((p = strrchr(buf, '\n')) != NULL) + p[0] = '\0'; + + return buf[0] ? buf : unknown_str; +} - /* close display */ - XCloseDisplay(dpy); +static const char * +swap_free(void) +{ + long total, free; + FILE *fp; + size_t bytes_read; + char *match; + + fp = fopen("/proc/meminfo", "r"); + if (fp == NULL) { + warn("Failed to open file /proc/meminfo"); + return unknown_str; + } + + if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) { + warn("swap_free: read error"); + fclose(fp); + return unknown_str; + } + fclose(fp); + + if ((match = strstr(buf, "SwapTotal")) == NULL) + return unknown_str; + sscanf(match, "SwapTotal: %ld kB\n", &total); + + if ((match = strstr(buf, "SwapFree")) == NULL) + return unknown_str; + sscanf(match, "SwapFree: %ld kB\n", &free); + + return bprintf("%f", (float)free / 1024 / 1024); +} - /* exit successfully */ - return 0; +static const char * +swap_perc(void) +{ + long total, free, cached; + FILE *fp; + size_t bytes_read; + char *match; + + fp = fopen("/proc/meminfo", "r"); + if (fp == NULL) { + warn("Failed to open file /proc/meminfo"); + return unknown_str; + } + + if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) { + warn("swap_perc: read error"); + fclose(fp); + return unknown_str; + } + fclose(fp); + + if ((match = strstr(buf, "SwapTotal")) == NULL) + return unknown_str; + sscanf(match, "SwapTotal: %ld kB\n", &total); + + if ((match = strstr(buf, "SwapCached")) == NULL) + return unknown_str; + sscanf(match, "SwapCached: %ld kB\n", &cached); + + if ((match = strstr(buf, "SwapFree")) == NULL) + return unknown_str; + sscanf(match, "SwapFree: %ld kB\n", &free); + + return bprintf("%d", 100 * (total - free - cached) / total); +} + +static const char * +swap_total(void) +{ + long total; + FILE *fp; + size_t bytes_read; + char *match; + + fp = fopen("/proc/meminfo", "r"); + if (fp == NULL) { + warn("Failed to open file /proc/meminfo"); + return unknown_str; + } + if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) { + warn("swap_total: read error"); + fclose(fp); + return unknown_str; + } + fclose(fp); + + if ((match = strstr(buf, "SwapTotal")) == NULL) + return unknown_str; + sscanf(match, "SwapTotal: %ld kB\n", &total); + + return bprintf("%f", (float)total / 1024 / 1024); +} + +static const char * +swap_used(void) +{ + long total, free, cached; + FILE *fp; + size_t bytes_read; + char *match; + + fp = fopen("/proc/meminfo", "r"); + if (fp == NULL) { + warn("Failed to open file /proc/meminfo"); + return unknown_str; + } + if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) { + warn("swap_used: read error"); + fclose(fp); + return unknown_str; + } + fclose(fp); + + if ((match = strstr(buf, "SwapTotal")) == NULL) + return unknown_str; + sscanf(match, "SwapTotal: %ld kB\n", &total); + + if ((match = strstr(buf, "SwapCached")) == NULL) + return unknown_str; + sscanf(match, "SwapCached: %ld kB\n", &cached); + + if ((match = strstr(buf, "SwapFree")) == NULL) + return unknown_str; + sscanf(match, "SwapFree: %ld kB\n", &free); + + return bprintf("%f", (float)(total - free - cached) / 1024 / 1024); +} + +static const char * +temp(const char *file) +{ + int temp; + + return (pscanf(file, "%d", &temp) == 1) ? + bprintf("%d", temp / 1000) : unknown_str; +} + +static const char * +uptime(void) +{ + struct sysinfo info; + int h = 0; + int m = 0; + + sysinfo(&info); + h = info.uptime / 3600; + m = (info.uptime - h * 3600 ) / 60; + + return bprintf("%dh %dm", h, m); +} + +static const char * +username(void) +{ + struct passwd *pw = getpwuid(geteuid()); + + if (pw == NULL) { + warn("Failed to get username"); + return unknown_str; + } + + return bprintf("%s", pw->pw_name); +} + +static const char * +uid(void) +{ + return bprintf("%d", geteuid()); +} + + +static const char * +vol_perc(const char *card) +{ + unsigned int i; + int v, afd, devmask; + char *vnames[] = SOUND_DEVICE_NAMES; + + afd = open(card, O_RDONLY | O_NONBLOCK); + if (afd == -1) { + warn("Cannot open %s", card); + return unknown_str; + } + + if (ioctl(afd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) { + warn("Cannot get volume for %s", card); + close(afd); + return unknown_str; + } + for (i = 0; i < LEN(vnames); i++) { + if (devmask & (1 << i) && !strcmp("vol", vnames[i])) { + if (ioctl(afd, MIXER_READ(i), &v) == -1) { + warn("vol_perc: ioctl"); + close(afd); + return unknown_str; + } + } + } + + close(afd); + + return bprintf("%d", v & 0xff); +} + +static const char * +wifi_perc(const char *iface) +{ + int i, perc; + char *p, *datastart; + char path[PATH_MAX]; + char status[5]; + FILE *fp; + + snprintf(path, sizeof(path), "%s%s%s", "/sys/class/net/", iface, "/operstate"); + fp = fopen(path, "r"); + if (fp == NULL) { + warn("Failed to open file %s", path); + return unknown_str; + } + p = fgets(status, 5, fp); + fclose(fp); + if(!p || strcmp(status, "up\n") != 0) { + return unknown_str; + } + + fp = fopen("/proc/net/wireless", "r"); + if (fp == NULL) { + warn("Failed to open file /proc/net/wireless"); + return unknown_str; + } + + for (i = 0; i < 3; i++) { + if (!(p = fgets(buf, sizeof(buf) - 1, fp))) + break; + } + fclose(fp); + if (i < 2 || !p) + return unknown_str; + + if ((datastart = strstr(buf, iface)) == NULL) + return unknown_str; + + datastart = (datastart+(strlen(iface)+1)); + sscanf(datastart + 1, " %*d %d %*d %*d %*d %*d %*d %*d %*d %*d", &perc); + + return bprintf("%d", perc); +} + +static const char * +wifi_essid(const char *iface) +{ + static char id[IW_ESSID_MAX_SIZE+1]; + int sockfd = socket(AF_INET, SOCK_DGRAM, 0); + struct iwreq wreq; + + memset(&wreq, 0, sizeof(struct iwreq)); + wreq.u.essid.length = IW_ESSID_MAX_SIZE+1; + snprintf(wreq.ifr_name, sizeof(wreq.ifr_name), "%s", iface); + + if (sockfd == -1) { + warn("Failed to get ESSID for interface %s", iface); + return unknown_str; + } + wreq.u.essid.pointer = id; + if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) { + warn("Failed to get ESSID for interface %s", iface); + return unknown_str; + } + + close(sockfd); + + if (strcmp(id, "") == 0) + return unknown_str; + else + return id; +} + +static void +terminate(const int signo) +{ + done = 1; +} + +static void +difftimespec(struct timespec *res, struct timespec *a, struct timespec *b) +{ + 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) * 1000000000; +} + +static void +usage(void) +{ + fprintf(stderr, "usage: %s [-s]\n", argv0); + exit(1); +} + +int +main(int argc, char *argv[]) +{ + struct sigaction act; + struct timespec start, current, diff, intspec, wait; + size_t i, len; + int sflag = 0; + char status[MAXLEN]; + + ARGBEGIN { + 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); + + if (!sflag && !(dpy = XOpenDisplay(NULL))) { + fprintf(stderr, "slstatus: cannot open display"); + return 1; + } + + while (!done) { + clock_gettime(CLOCK_MONOTONIC, &start); + + status[0] = '\0'; + for (i = len = 0; i < LEN(args); i++) { + len += snprintf(status + len, sizeof(status) - len, + args[i].fmt, args[i].func(args[i].args)); + + if (len >= sizeof(status)) { + status[sizeof(status) - 1] = '\0'; + } + } + + if (sflag) { + printf("%s\n", status); + } else { + XStoreName(dpy, DefaultRootWindow(dpy), status); + XSync(dpy, False); + } + + if (!done) { + clock_gettime(CLOCK_MONOTONIC, ¤t); + difftimespec(&diff, ¤t, &start); + + intspec.tv_sec = interval / 1000; + intspec.tv_nsec = (interval % 1000) * 1000000; + difftimespec(&wait, &intspec, &diff); + + if (wait.tv_sec >= 0) { + nanosleep(&wait, NULL); + } + } + } + + if (!sflag) { + XStoreName(dpy, DefaultRootWindow(dpy), NULL); + XCloseDisplay(dpy); + } + + return 0; }