+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;