+static const char *
+gid(void)
+{
+ return bprintf("%d", getgid());
+}
+
+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)
+{
+ long total;
+
+ return (pscanf("/proc/meminfo", "MemTotal: %ld kB\n", &total) == 1) ?
+ bprintf("%f", (float)total / 1024 / 1024) : unknown_str;
+}
+
+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;
+}
+
+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;
+}
+
+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);
+}
+
+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);
+}