+static char *
+swap_free(void)
+{
+ long total, free;
+ FILE *fp;
+ char buf[2048];
+ size_t bytes_read;
+ char *match;
+
+ fp = fopen("/proc/meminfo", "r");
+ if (fp == NULL) {
+ warn("Failed to open file /proc/meminfo");
+ return smprintf("%s", UNKNOWN_STR);
+ }
+
+ if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) {
+ warn("swap_free: read error");
+ fclose(fp);
+ return smprintf("%s", UNKNOWN_STR);
+ }
+
+ buf[bytes_read] = '\0';
+ fclose(fp);
+
+ if ((match = strstr(buf, "SwapTotal")) == NULL) {
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+ if ((match = strstr(buf, "SwapFree")) == NULL) {
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ sscanf(match, "SwapFree: %ld kB\n", &free);
+
+ return smprintf("%f", (float)free / 1024 / 1024);
+}
+
+static char *
+swap_perc(void)
+{
+ long total, free, cached;
+ FILE *fp;
+ char buf[2048];
+ size_t bytes_read;
+ char *match;
+
+ fp = fopen("/proc/meminfo", "r");
+ if (fp == NULL) {
+ warn("Failed to open file /proc/meminfo");
+ return smprintf("%s", UNKNOWN_STR);
+ }
+
+ if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) {
+ warn("swap_perc: read error");
+ fclose(fp);
+ return smprintf("%s", UNKNOWN_STR);
+ }
+
+ buf[bytes_read] = '\0';
+ fclose(fp);
+
+ if ((match = strstr(buf, "SwapTotal")) == NULL) {
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+ if ((match = strstr(buf, "SwapCached")) == NULL) {
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ sscanf(match, "SwapCached: %ld kB\n", &cached);
+
+ if ((match = strstr(buf, "SwapFree")) == NULL) {
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ sscanf(match, "SwapFree: %ld kB\n", &free);
+
+ return smprintf("%d%%", 100 * (total - free - cached) / total);
+}
+
+static char *
+swap_total(void)
+{
+ long total;
+ FILE *fp;
+ char buf[2048];
+ size_t bytes_read;
+ char *match;
+
+ fp = fopen("/proc/meminfo", "r");
+ if (fp == NULL) {
+ warn("Failed to open file /proc/meminfo");
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) {
+ warn("swap_total: read error");
+ fclose(fp);
+ return smprintf("%s", UNKNOWN_STR);
+ }
+
+ buf[bytes_read] = '\0';
+ fclose(fp);
+
+ if ((match = strstr(buf, "SwapTotal")) == NULL) {
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+ return smprintf("%f", (float)total / 1024 / 1024);
+}
+
+static char *
+swap_used(void)
+{
+ long total, free, cached;
+ FILE *fp;
+ char buf[2048];
+ size_t bytes_read;
+ char *match;
+
+ fp = fopen("/proc/meminfo", "r");
+ if (fp == NULL) {
+ warn("Failed to open file /proc/meminfo");
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) {
+ warn("swap_used: read error");
+ fclose(fp);
+ return smprintf("%s", UNKNOWN_STR);
+ }
+
+ buf[bytes_read] = '\0';
+ fclose(fp);
+
+ if ((match = strstr(buf, "SwapTotal")) == NULL) {
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+ if ((match = strstr(buf, "SwapCached")) == NULL) {
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ sscanf(match, "SwapCached: %ld kB\n", &cached);
+
+ if ((match = strstr(buf, "SwapFree")) == NULL) {
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ sscanf(match, "SwapFree: %ld kB\n", &free);
+
+ return smprintf("%f", (float)(total - free - cached) / 1024 / 1024);
+}
+
+static char *
+temp(const char *file)
+{
+ int temp;
+ FILE *fp;
+
+ fp = fopen(file, "r");
+ if (fp == NULL) {
+ warn("Failed to open file %s", file);
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ fscanf(fp, "%d", &temp);
+ fclose(fp);
+
+ return smprintf("%d°C", temp / 1000);
+}
+
+static 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 smprintf("%dh %dm", h, m);
+}
+
+static char *
+username(void)
+{
+ uid_t uid = geteuid();
+ struct passwd *pw = getpwuid(uid);
+
+ if (pw == NULL) {
+ warn("Failed to get username");
+ return smprintf("%s", UNKNOWN_STR);
+ }
+
+ return smprintf("%s", pw->pw_name);
+}
+
+static char *
+uid(void)
+{
+ return smprintf("%d", geteuid());
+}
+
+
+static char *
+vol_perc(const char *card)
+{
+ int mute;
+ long int vol, max, min;
+ snd_mixer_t *handle;
+ snd_mixer_elem_t *elem;
+ snd_mixer_selem_id_t *s_elem;
+
+ snd_mixer_open(&handle, 0);
+ snd_mixer_attach(handle, card);
+ snd_mixer_selem_register(handle, NULL, NULL);
+ snd_mixer_load(handle);
+ snd_mixer_selem_id_malloc(&s_elem);
+ snd_mixer_selem_id_set_name(s_elem, "Master");
+ elem = snd_mixer_find_selem(handle, s_elem);
+
+ if (elem == NULL) {
+ snd_mixer_selem_id_free(s_elem);
+ snd_mixer_close(handle);
+ warn("Failed to get volume percentage for %s", card);
+ return smprintf("%s", UNKNOWN_STR);
+ }
+
+ snd_mixer_handle_events(handle);
+ snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
+ snd_mixer_selem_get_playback_volume(elem, 0, &vol);
+ snd_mixer_selem_get_playback_switch(elem, 0, &mute);
+
+ snd_mixer_selem_id_free(s_elem);
+ snd_mixer_close(handle);
+
+ if (!mute)
+ return smprintf("mute");
+ else if (max == 0)
+ return smprintf("0%%");
+ else
+ return smprintf("%lu%%", ((uint_fast16_t)(vol * 100) / max));
+}
+
+static char *
+wifi_perc(const char *iface)
+{
+ int perc;
+ char buf[255];
+ char *datastart;
+ char status[5];
+ FILE *fp;
+
+ ccat(3, "/sys/class/net/", iface, "/operstate");
+ fp = fopen(concat, "r");
+ if (fp == NULL) {
+ warn("Failed to open file %s", concat);
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ fgets(status, 5, fp);
+ fclose(fp);
+ if(strcmp(status, "up\n") != 0) {
+ return smprintf("%s", UNKNOWN_STR);
+ }
+
+ fp = fopen("/proc/net/wireless", "r");
+ if (fp == NULL) {
+ warn("Failed to open file /proc/net/wireless");
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ ccat(2, iface, ":");
+ fgets(buf, sizeof(buf), fp);
+ fgets(buf, sizeof(buf), fp);
+ fgets(buf, sizeof(buf), fp);
+ fclose(fp);
+
+ if ((datastart = strstr(buf, concat)) == NULL) {
+ return smprintf("%s", UNKNOWN_STR);
+ }
+ datastart = (datastart+(strlen(iface)+1));
+ sscanf(datastart + 1, " %*d %d %*d %*d %*d %*d %*d %*d %*d %*d", &perc);
+
+ return smprintf("%d%%", perc);
+}
+
+static char *
+wifi_essid(const char *iface)
+{
+ 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 smprintf("%s", UNKNOWN_STR);
+ }
+ wreq.u.essid.pointer = id;
+ if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
+ warn("Failed to get ESSID for interface %s", iface);
+ return smprintf("%s", UNKNOWN_STR);
+ }
+
+ close(sockfd);
+
+ if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
+ return smprintf("%s", UNKNOWN_STR);
+ else
+ return smprintf("%s", (char *)wreq.u.essid.pointer);
+}
+
+static char *
+kernel_release(void)
+{
+ struct utsname udata;
+ if (uname(&udata) < 0)
+ return smprintf("%s", UNKNOWN_STR);
+
+ return smprintf("%s", udata.release);
+}
+
+static void
+sighandler(const int signo)
+{
+ if (signo == SIGTERM || signo == SIGINT) {
+ done = 1;
+ }
+}
+
+static void
+usage(void)
+{
+ fprintf(stderr, "usage: %s [-dhov]\n", argv0);
+ exit(1);
+}