Move components into dedicated subdirectory

This brings us a lot more tidiness.

19 files changed, 796 insertions, 0 deletions

diff --git a/components/battery.c b/components/battery.c
new file mode 100644
index 0000000..f384aab
--- /dev/null
+++ b/components/battery.c
@@ -0,0 +1,56 @@
+/* See LICENSE file for copyright and license details. */
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "../util.h"
+
+const char *
+battery_perc(const char *bat)
+{
+	int perc;
+	char path[PATH_MAX];
+
+	snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/capacity");
+	return (pscanf(path, "%i", &perc) == 1) ?
+	       bprintf("%d", perc) : NULL;
+}
+
+const char *
+battery_power(const char *bat)
+{
+	int watts;
+	char path[PATH_MAX];
+
+	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) : NULL;
+}
+
+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 NULL;
+	}
+
+	for (i = 0; i < LEN(map); i++) {
+		if (!strcmp(map[i].state, state)) {
+			break;
+		}
+	}
+	return (i == LEN(map)) ? "?" : map[i].symbol;
+}
diff --git a/components/cpu.c b/components/cpu.c
new file mode 100644
index 0000000..4a4a80b
--- /dev/null
+++ b/components/cpu.c
@@ -0,0 +1,63 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <string.h>
+
+#include "../util.h"
+
+const char *
+cpu_freq(void)
+{
+	int freq;
+
+	return (pscanf("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq",
+	               "%i", &freq) == 1) ?
+	       bprintf("%d", (freq + 500) / 1000) : NULL;
+}
+
+const char *
+cpu_perc(void)
+{
+	int perc;
+	static long double a[7];
+	static int valid;
+	long double b[7];
+
+	memcpy(b, a, sizeof(b));
+	if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2],
+	           &a[3], &a[4], &a[5], &a[6]) != 7) {
+		return NULL;
+	}
+	if (!valid) {
+		valid = 1;
+		return NULL;
+	}
+
+	perc = 100 * ((b[0]+b[1]+b[2]+b[5]+b[6]) - (a[0]+a[1]+a[2]+a[5]+a[6])) /
+	       ((b[0]+b[1]+b[2]+b[3]+b[4]+b[5]+b[6]) - (a[0]+a[1]+a[2]+a[3]+a[4]+a[5]+a[6]));
+
+	return bprintf("%d", perc);
+}
+
+const char *
+cpu_iowait(void)
+{
+	int perc;
+	static int valid;
+	static long double a[7];
+	long double b[7];
+
+	memcpy(b, a, sizeof(b));
+	if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2],
+	           &a[3], &a[4], &a[5], &a[6]) != 7) {
+		return NULL;
+	}
+	if (!valid) {
+		valid = 1;
+		return NULL;
+	}
+
+	perc = 100 * ((b[4]) - (a[4])) /
+	       ((b[0]+b[1]+b[2]+b[3]+b[4]+b[5]+b[6]) - (a[0]+a[1]+a[2]+a[3]+a[4]+a[5]+a[6]));
+
+	return bprintf("%d", perc);
+}
diff --git a/components/datetime.c b/components/datetime.c
new file mode 100644
index 0000000..0816923
--- /dev/null
+++ b/components/datetime.c
@@ -0,0 +1,16 @@
+/* See LICENSE file for copyright and license details. */
+#include <time.h>
+
+#include "../util.h"
+
+const char *
+datetime(const char *fmt)
+{
+	time_t t;
+
+	t = time(NULL);
+	if (strftime(buf, sizeof(buf), fmt, localtime(&t)) == 0)
+		return NULL;
+
+	return buf;
+}
diff --git a/components/disk.c b/components/disk.c
new file mode 100644
index 0000000..90a8e0b
--- /dev/null
+++ b/components/disk.c
@@ -0,0 +1,61 @@
+/* See LICENSE file for copyright and license details. */
+#include <err.h>
+#include <stdio.h>
+#include <sys/statvfs.h>
+
+#include "../util.h"
+
+const char *
+disk_free(const char *mnt)
+{
+	struct statvfs fs;
+
+	if (statvfs(mnt, &fs) < 0) {
+		warn("Failed to get filesystem info");
+		return NULL;
+	}
+
+	return bprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
+}
+
+const char *
+disk_perc(const char *mnt)
+{
+	int perc;
+	struct statvfs fs;
+
+	if (statvfs(mnt, &fs) < 0) {
+		warn("Failed to get filesystem info");
+		return NULL;
+	}
+
+	perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
+
+	return bprintf("%d", perc);
+}
+
+const char *
+disk_total(const char *mnt)
+{
+	struct statvfs fs;
+
+	if (statvfs(mnt, &fs) < 0) {
+		warn("Failed to get filesystem info");
+		return NULL;
+	}
+
+	return bprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
+}
+
+const char *
+disk_used(const char *mnt)
+{
+	struct statvfs fs;
+
+	if (statvfs(mnt, &fs) < 0) {
+		warn("Failed to get filesystem info");
+		return NULL;
+	}
+
+	return bprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
+}
diff --git a/components/entropy.c b/components/entropy.c
new file mode 100644
index 0000000..0d3564e
--- /dev/null
+++ b/components/entropy.c
@@ -0,0 +1,13 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+
+#include "../util.h"
+
+const char *
+entropy(void)
+{
+	int num;
+
+	return (pscanf("/proc/sys/kernel/random/entropy_avail", "%d", &num) == 1) ?
+	               bprintf("%d", num) : NULL;
+}
diff --git a/components/hostname.c b/components/hostname.c
new file mode 100644
index 0000000..aed77a6
--- /dev/null
+++ b/components/hostname.c
@@ -0,0 +1,16 @@
+/* See LICENSE file for copyright and license details. */
+#include <err.h>
+#include <unistd.h>
+
+#include "../util.h"
+
+const char *
+hostname(void)
+{
+	if (gethostname(buf, sizeof(buf)) == -1) {
+		warn("hostname");
+		return NULL;
+	}
+
+	return buf;
+}
diff --git a/components/ip.c b/components/ip.c
new file mode 100644
index 0000000..f98b2ed
--- /dev/null
+++ b/components/ip.c
@@ -0,0 +1,70 @@
+/* See LICENSE file for copyright and license details. */
+#include <err.h>
+#include <ifaddrs.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "../util.h"
+
+const char *
+ipv4(const char *iface)
+{
+	struct ifaddrs *ifaddr, *ifa;
+	int s;
+	char host[NI_MAXHOST];
+
+	if (getifaddrs(&ifaddr) == -1) {
+		warn("Failed to get IPv4 address for interface %s", iface);
+		return NULL;
+	}
+
+	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 IPv4 address for interface %s", iface);
+				return NULL;
+			}
+			return bprintf("%s", host);
+		}
+	}
+
+	freeifaddrs(ifaddr);
+
+	return NULL;
+}
+
+const char *
+ipv6(const char *iface)
+{
+	struct ifaddrs *ifaddr, *ifa;
+	int s;
+	char host[NI_MAXHOST];
+
+	if (getifaddrs(&ifaddr) == -1) {
+		warn("Failed to get IPv6 address for interface %s", iface);
+		return NULL;
+	}
+
+	for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
+		if (ifa->ifa_addr == NULL) {
+			continue;
+		}
+		s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in6), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
+		if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET6)) {
+			if (s != 0) {
+				warnx("Failed to get IPv6 address for interface %s", iface);
+				return NULL;
+			}
+			return bprintf("%s", host);
+		}
+	}
+
+	freeifaddrs(ifaddr);
+
+	return NULL;
+}
diff --git a/components/kernel_release.c b/components/kernel_release.c
new file mode 100644
index 0000000..f539b6a
--- /dev/null
+++ b/components/kernel_release.c
@@ -0,0 +1,17 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/utsname.h>
+#include <stdio.h>
+
+#include "../util.h"
+
+const char *
+kernel_release(void)
+{
+	struct utsname udata;
+
+	if (uname(&udata) < 0) {
+		return NULL;
+	}
+
+	return bprintf("%s", udata.release);
+}
diff --git a/components/keyboard_indicators.c b/components/keyboard_indicators.c
new file mode 100644
index 0000000..b7713b6
--- /dev/null
+++ b/components/keyboard_indicators.c
@@ -0,0 +1,30 @@
+/* See LICENSE file for copyright and license details. */
+#include <err.h>
+#include <X11/Xlib.h>
+
+#include "../util.h"
+
+const char *
+keyboard_indicators(void)
+{
+	Display *dpy = XOpenDisplay(NULL);
+	XKeyboardState state;
+
+	if (dpy == NULL) {
+		warnx("XOpenDisplay failed");
+		return NULL;
+	}
+	XGetKeyboardControl(dpy, &state);
+	XCloseDisplay(dpy);
+
+	switch (state.led_mask) {
+		case 1:
+			return "c";
+		case 2:
+			return "n";
+		case 3:
+			return "cn";
+		default:
+			return "";
+	}
+}
diff --git a/components/load_avg.c b/components/load_avg.c
new file mode 100644
index 0000000..d6f6bd4
--- /dev/null
+++ b/components/load_avg.c
@@ -0,0 +1,18 @@
+/* See LICENSE file for copyright and license details. */
+#include <err.h>
+#include <stdlib.h>
+
+#include "../util.h"
+
+const char *
+load_avg(const char *fmt)
+{
+	double avgs[3];
+
+	if (getloadavg(avgs, 3) < 0) {
+		warnx("Failed to get the load avg");
+		return NULL;
+	}
+
+	return bprintf(fmt, avgs[0], avgs[1], avgs[2]);
+}
diff --git a/components/num_files.c b/components/num_files.c
new file mode 100644
index 0000000..a8a3894
--- /dev/null
+++ b/components/num_files.c
@@ -0,0 +1,30 @@
+/* See LICENSE file for copyright and license details. */
+#include <dirent.h>
+#include <err.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "../util.h"
+
+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 NULL;
+	}
+
+	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);
+}
diff --git a/components/ram.c b/components/ram.c
new file mode 100644
index 0000000..f696039
--- /dev/null
+++ b/components/ram.c
@@ -0,0 +1,52 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+
+#include "../util.h"
+
+const char *
+ram_free(void)
+{
+	long free;
+
+	return (pscanf("/proc/meminfo", "MemFree: %ld kB\n", &free) == 1) ?
+	       bprintf("%f", (float)free / 1024 / 1024) : NULL;
+}
+
+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) :
+	       NULL;
+}
+
+const char *
+ram_total(void)
+{
+	long total;
+
+	return (pscanf("/proc/meminfo", "MemTotal: %ld kB\n", &total) == 1) ?
+	       bprintf("%f", (float)total / 1024 / 1024) : NULL;
+}
+
+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) :
+	       NULL;
+}
diff --git a/components/run_command.c b/components/run_command.c
new file mode 100644
index 0000000..99f54ea
--- /dev/null
+++ b/components/run_command.c
@@ -0,0 +1,27 @@
+/* See LICENSE file for copyright and license details. */
+#include <err.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "../util.h"
+
+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 NULL;
+	}
+	p = fgets(buf, sizeof(buf) - 1, fp);
+	pclose(fp);
+	if (!p)
+		return NULL;
+	if ((p = strrchr(buf, '\n')) != NULL)
+		p[0] = '\0';
+
+	return buf[0] ? buf : NULL;
+}
diff --git a/components/swap.c b/components/swap.c
new file mode 100644
index 0000000..e4eec64
--- /dev/null
+++ b/components/swap.c
@@ -0,0 +1,136 @@
+/* See LICENSE file for copyright and license details. */
+#include <err.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "../util.h"
+
+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 NULL;
+	}
+
+	if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
+		warn("swap_free: read error");
+		fclose(fp);
+		return NULL;
+	}
+	fclose(fp);
+
+	if ((match = strstr(buf, "SwapTotal")) == NULL)
+		return NULL;
+	sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+	if ((match = strstr(buf, "SwapFree")) == NULL)
+		return NULL;
+	sscanf(match, "SwapFree: %ld kB\n", &free);
+
+	return bprintf("%f", (float)free / 1024 / 1024);
+}
+
+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 NULL;
+	}
+
+	if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
+		warn("swap_perc: read error");
+		fclose(fp);
+		return NULL;
+	}
+	fclose(fp);
+
+	if ((match = strstr(buf, "SwapTotal")) == NULL)
+		return NULL;
+	sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+	if ((match = strstr(buf, "SwapCached")) == NULL)
+		return NULL;
+	sscanf(match, "SwapCached: %ld kB\n", &cached);
+
+	if ((match = strstr(buf, "SwapFree")) == NULL)
+		return NULL;
+	sscanf(match, "SwapFree: %ld kB\n", &free);
+
+	return bprintf("%d", 100 * (total - free - cached) / total);
+}
+
+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 NULL;
+	}
+	if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
+		warn("swap_total: read error");
+		fclose(fp);
+		return NULL;
+	}
+	fclose(fp);
+
+	if ((match = strstr(buf, "SwapTotal")) == NULL)
+		return NULL;
+	sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+	return bprintf("%f", (float)total / 1024 / 1024);
+}
+
+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 NULL;
+	}
+	if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
+		warn("swap_used: read error");
+		fclose(fp);
+		return NULL;
+	}
+	fclose(fp);
+
+	if ((match = strstr(buf, "SwapTotal")) == NULL)
+		return NULL;
+	sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+	if ((match = strstr(buf, "SwapCached")) == NULL)
+		return NULL;
+	sscanf(match, "SwapCached: %ld kB\n", &cached);
+
+	if ((match = strstr(buf, "SwapFree")) == NULL)
+		return NULL;
+	sscanf(match, "SwapFree: %ld kB\n", &free);
+
+	return bprintf("%f", (float)(total - free - cached) / 1024 / 1024);
+}
diff --git a/components/temperature.c b/components/temperature.c
new file mode 100644
index 0000000..bbd4daf
--- /dev/null
+++ b/components/temperature.c
@@ -0,0 +1,13 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+
+#include "../util.h"
+
+const char *
+temp(const char *file)
+{
+	int temp;
+
+	return (pscanf(file, "%d", &temp) == 1) ?
+	       bprintf("%d", temp / 1000) : NULL;
+}
diff --git a/components/uptime.c b/components/uptime.c
new file mode 100644
index 0000000..b455182
--- /dev/null
+++ b/components/uptime.c
@@ -0,0 +1,18 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/sysinfo.h>
+
+#include "../util.h"
+
+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);
+}
diff --git a/components/user.c b/components/user.c
new file mode 100644
index 0000000..8dcb86a
--- /dev/null
+++ b/components/user.c
@@ -0,0 +1,32 @@
+/* See LICENSE file for copyright and license details. */
+#include <err.h>
+#include <pwd.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "../util.h"
+
+const char *
+gid(void)
+{
+	return bprintf("%d", getgid());
+}
+
+const char *
+username(void)
+{
+	struct passwd *pw = getpwuid(geteuid());
+
+	if (pw == NULL) {
+		warn("Failed to get username");
+		return NULL;
+	}
+
+	return bprintf("%s", pw->pw_name);
+}
+
+const char *
+uid(void)
+{
+	return bprintf("%d", geteuid());
+}
diff --git a/components/volume.c b/components/volume.c
new file mode 100644
index 0000000..f5aa18d
--- /dev/null
+++ b/components/volume.c
@@ -0,0 +1,43 @@
+/* See LICENSE file for copyright and license details. */
+#include <err.h>
+#include <fcntl.h>
+#include <sys/soundcard.h>
+#include <sys/ioctl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "../util.h"
+
+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 NULL;
+	}
+
+	if (ioctl(afd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) {
+		warn("Cannot get volume for %s", card);
+		close(afd);
+		return NULL;
+	}
+	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 NULL;
+			}
+		}
+	}
+
+	close(afd);
+
+	return bprintf("%d", v & 0xff);
+}
diff --git a/components/wifi.c b/components/wifi.c
new file mode 100644
index 0000000..30b57ab
--- /dev/null
+++ b/components/wifi.c
@@ -0,0 +1,85 @@
+/* See LICENSE file for copyright and license details. */
+#include <err.h>
+#include <ifaddrs.h>
+#include <linux/wireless.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <limits.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#include "../util.h"
+
+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 NULL;
+	}
+	p = fgets(status, 5, fp);
+	fclose(fp);
+	if(!p || strcmp(status, "up\n") != 0) {
+		return NULL;
+	}
+
+	fp = fopen("/proc/net/wireless", "r");
+	if (fp == NULL) {
+		warn("Failed to open file /proc/net/wireless");
+		return NULL;
+	}
+
+	for (i = 0; i < 3; i++) {
+		if (!(p = fgets(buf, sizeof(buf) - 1, fp)))
+			break;
+	}
+	fclose(fp);
+	if (i < 2 || !p)
+		return NULL;
+
+	if ((datastart = strstr(buf, iface)) == NULL)
+		return NULL;
+
+	datastart = (datastart+(strlen(iface)+1));
+	sscanf(datastart + 1, " %*d   %d  %*d  %*d		  %*d	   %*d		%*d		 %*d	  %*d		 %*d", &perc);
+
+	return bprintf("%d", perc);
+}
+
+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 NULL;
+	}
+	wreq.u.essid.pointer = id;
+	if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
+		warn("Failed to get ESSID for interface %s", iface);
+		return NULL;
+	}
+
+	close(sockfd);
+
+	if (strcmp(id, "") == 0)
+		return NULL;
+	else
+		return id;
+}