Use indentation to increase readability

Granted, this style is definitely not common, but for the short
utility-functions of this program it's just the right choice. This
provides great flexibility, such that in the long run, it will be
possible to also share code between the OS-implementations.

This also keeps the state-keeping at a minimum and makes it clearer
which functions are implemented on which OS without having to jiggle
around with too many files in the process.

9 files changed, 573 insertions, 539 deletions

diff --git a/LICENSE b/LICENSE
index ae87dc6..47282b2 100644
--- a/LICENSE
+++ b/LICENSE
@@ -11,7 +11,7 @@ Copyright 2016-2017 Quentin Rameau <quinq@fifth.space>
 Copyright 2016 Mike Coddington <mike@coddington.us>
 Copyright 2016-2018 parazyd <parazyd@dyne.org>
 Copyright 2017 Tobias Stoeckmann <tobias@stoeckmann.org>
-Copyright 2017 Laslo Hunhold <dev@frign.de>
+Copyright 2017-2018 Laslo Hunhold <dev@frign.de>
 Copyright 2018 Darron Anderson <darronanderson@protonmail.com>
 
 Permission to use, copy, modify, and/or distribute this software for any
diff --git a/components/battery.c b/components/battery.c
index 955d8ab..04dfa47 100644
--- a/components/battery.c
+++ b/components/battery.c
@@ -2,90 +2,90 @@
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
-#if defined(__linux__)
-#include <limits.h>
-#include <string.h>
-#elif defined(__OpenBSD__)
-#include <sys/ioctl.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <machine/apmvar.h>
-#endif
 
 #include "../util.h"
 
 #if defined(__linux__)
-const char *
-battery_perc(const char *bat)
-{
-	int perc;
-	char path[PATH_MAX];
+	#include <limits.h>
 
-	snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/capacity");
-	return (pscanf(path, "%i", &perc) == 1) ?
-	       bprintf("%d", perc) : NULL;
-}
-#elif defined(__OpenBSD__)
-const char *
-battery_perc(const char *null)
-{
-	struct apm_power_info apm_info;
-	int fd;
+	const char *
+	battery_perc(const char *bat)
+	{
+		int perc;
+		char path[PATH_MAX];
 
-	fd = open("/dev/apm", O_RDONLY);
-	if (fd < 0) {
-		fprintf(stderr, "open '/dev/apm': %s\n", strerror(errno));
-		return NULL;
+		snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/",
+		         bat, "/capacity");
+		return (pscanf(path, "%i", &perc) == 1) ?
+		       bprintf("%d", perc) : NULL;
 	}
 
-	if (ioctl(fd, APM_IOC_GETPOWER, &apm_info) < 0) {
-		fprintf(stderr, "ioctl 'APM_IOC_GETPOWER': %s\n", strerror(errno));
-		close(fd);
-		return 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;
 	}
-	close(fd);
 
-	return bprintf("%d", apm_info.battery_life);
-}
-#endif
+	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];
 
-#if defined(__linux__)
-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, "/status");
+		if (pscanf(path, "%12s", state) != 1) {
+			return NULL;
+		}
 
-	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;
-}
+		for (i = 0; i < LEN(map); i++) {
+			if (!strcmp(map[i].state, state)) {
+				break;
+			}
+		}
+		return (i == LEN(map)) ? "?" : map[i].symbol;
+	}
+#elif defined(__OpenBSD__)
+	#include <fcntl.h>
+	#include <machine/apmvar.h>
+	#include <sys/ioctl.h>
+	#include <unistd.h>
 
-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];
+	const char *
+	battery_perc(const char *null)
+	{
+		struct apm_power_info apm_info;
+		int fd;
 
-	snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/status");
-	if (pscanf(path, "%12s", state) != 1) {
-		return NULL;
-	}
+		fd = open("/dev/apm", O_RDONLY);
+		if (fd < 0) {
+			fprintf(stderr, "open '/dev/apm': %s\n", strerror(errno));
+			return NULL;
+		}
 
-	for (i = 0; i < LEN(map); i++) {
-		if (!strcmp(map[i].state, state)) {
-			break;
+		if (ioctl(fd, APM_IOC_GETPOWER, &apm_info) < 0) {
+			fprintf(stderr, "ioctl 'APM_IOC_GETPOWER': %s\n",
+			        strerror(errno));
+			close(fd);
+			return NULL;
 		}
+		close(fd);
+
+		return bprintf("%d", apm_info.battery_life);
 	}
-	return (i == LEN(map)) ? "?" : map[i].symbol;
-}
 #endif
diff --git a/components/cpu.c b/components/cpu.c
index 11e2e98..e7f4cd9 100644
--- a/components/cpu.c
+++ b/components/cpu.c
@@ -2,87 +2,91 @@
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
-#if defined(__OpenBSD__)
-#include <sys/sysctl.h>
-#endif
 
 #include "../util.h"
 
 #if defined(__linux__)
-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;
+	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;
 	}
 
-	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]));
+	const char *
+	cpu_perc(void)
+	{
+		int perc;
+		static long double a[7];
+		static int valid;
+		long double b[7];
 
-	return bprintf("%d", perc);
-}
+		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;
+		}
 
-const char *
-cpu_iowait(void)
-{
-	int perc;
-	static int valid;
-	static long double a[7];
-	long double b[7];
+		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]));
 
-	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;
+		return bprintf("%d", perc);
 	}
 
-	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]));
+	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;
+		}
 
-	return bprintf("%d", perc);
-}
+		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);
+	}
 #elif defined(__OpenBSD__)
-const char *
-cpu_freq(void)
-{
-	int freq, mib[2];
-	size_t size;
+	#include <sys/sysctl.h>
 
-	mib[0] = CTL_HW;
-	mib[1] = HW_CPUSPEED;
+	const char *
+	cpu_freq(void)
+	{
+		int freq, mib[2];
+		size_t size;
 
-	size = sizeof(freq);
+		mib[0] = CTL_HW;
+		mib[1] = HW_CPUSPEED;
 
-	if (sysctl(mib, 2, &freq, &size, NULL, 0) == -1) {
-		fprintf(stderr, "sysctl 'HW_CPUSPEED': %s\n", strerror(errno));
-		return NULL;
-	}
+		size = sizeof(freq);
 
-	return bprintf("%d", freq);
-}
+		if (sysctl(mib, 2, &freq, &size, NULL, 0) == -1) {
+			fprintf(stderr, "sysctl 'HW_CPUSPEED': %s\n",
+			        strerror(errno));
+			return NULL;
+		}
+
+		return bprintf("%d", freq);
+	}
 #endif
diff --git a/components/entropy.c b/components/entropy.c
index 65c65a1..2baa8aa 100644
--- a/components/entropy.c
+++ b/components/entropy.c
@@ -1,15 +1,18 @@
 /* See LICENSE file for copyright and license details. */
 #if defined(__linux__)
-#include <stdio.h>
+	#include <stdio.h>
 
-#include "../util.h"
+	#include "../util.h"
 
-const char *
-entropy(void)
-{
-	int num;
+	const char *
+	entropy(void)
+	{
+		int num;
 
-	return (pscanf("/proc/sys/kernel/random/entropy_avail", "%d", &num) == 1) ?
-	               bprintf("%d", num) : NULL;
-}
+		return (pscanf("/proc/sys/kernel/random/entropy_avail",
+		               "%d", &num) == 1) ?
+		       bprintf("%d", num) : NULL;
+	}
+#elif defined(__OpenBSD__)
+	/* unimplemented */
 #endif
diff --git a/components/ram.c b/components/ram.c
index 55ec5b9..5611022 100644
--- a/components/ram.c
+++ b/components/ram.c
@@ -1,129 +1,133 @@
 /* See LICENSE file for copyright and license details. */
 #include <stdio.h>
-#if defined (__OpenBSD__)
-#include <sys/types.h>
-#include <sys/sysctl.h>
-#include <stdlib.h>
-#include <unistd.h>
-#endif
 
 #include "../util.h"
 
 #if defined(__linux__)
-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;
-}
-#elif defined(__OpenBSD__)
-inline int
-load_uvmexp(struct uvmexp *uvmexp)
-{
-	int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
-	size_t size;
-
-	size = sizeof(*uvmexp);
-
-	return sysctl(uvmexp_mib, 2, uvmexp, &size, NULL, 0) >= 0 ? 1 : 0;
-}
-
-const char *
-ram_free(void)
-{
-	struct uvmexp uvmexp;
-	float free;
-	int free_pages;
-
-	if (load_uvmexp(&uvmexp)) {
-		free_pages = uvmexp.npages - uvmexp.active;
-		free = (double) (free_pages * uvmexp.pagesize) / 1024 / 1024 / 1024;
-		return bprintf("%f", free);
+	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;
 	}
 
-	return 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;
+	}
+#elif defined(__OpenBSD__)
+	#include <sys/types.h>
+	#include <sys/sysctl.h>
+	#include <stdlib.h>
+	#include <unistd.h>
+
+	inline int
+	load_uvmexp(struct uvmexp *uvmexp)
+	{
+		int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
+		size_t size;
+
+		size = sizeof(*uvmexp);
 
-const char *
-ram_perc(void)
-{
-	struct uvmexp uvmexp;
-	int percent;
+		return sysctl(uvmexp_mib, 2, uvmexp, &size, NULL, 0) >= 0 ? 1 : 0;
+	}
 
-	if (load_uvmexp(&uvmexp)) {
-		percent = uvmexp.active * 100 / uvmexp.npages;
-		return bprintf("%d", percent);
+	const char *
+	ram_free(void)
+	{
+		struct uvmexp uvmexp;
+		float free;
+		int free_pages;
+
+		if (load_uvmexp(&uvmexp)) {
+			free_pages = uvmexp.npages - uvmexp.active;
+			free = (double) (free_pages * uvmexp.pagesize) / 1024 /
+			       1024 / 1024;
+			return bprintf("%f", free);
+		}
+
+		return NULL;
 	}
 
-	return NULL;
-}
+	const char *
+	ram_perc(void)
+	{
+		struct uvmexp uvmexp;
+		int percent;
 
-const char *
-ram_total(void)
-{
-	struct uvmexp uvmexp;
-	float total;
+		if (load_uvmexp(&uvmexp)) {
+			percent = uvmexp.active * 100 / uvmexp.npages;
+			return bprintf("%d", percent);
+		}
 
-	if (load_uvmexp(&uvmexp)) {
-		total = (double) (uvmexp.npages * uvmexp.pagesize) / 1024 / 1024 / 1024;
-		return bprintf("%f", total);
+		return NULL;
 	}
 
-	return NULL;
-}
+	const char *
+	ram_total(void)
+	{
+		struct uvmexp uvmexp;
+		float total;
 
-const char *
-ram_used(void)
-{
-	struct uvmexp uvmexp;
-	float used;
+		if (load_uvmexp(&uvmexp)) {
+			total = (double) (uvmexp.npages * uvmexp.pagesize) /
+			        1024 / 1024 / 1024;
+			return bprintf("%f", total);
+		}
 
-	if (load_uvmexp(&uvmexp)) {
-		used = (double) (uvmexp.active * uvmexp.pagesize) / 1024 / 1024 / 1024;
-		return bprintf("%f", used);
+		return NULL;
 	}
 
-	return NULL;
-}
+	const char *
+	ram_used(void)
+	{
+		struct uvmexp uvmexp;
+		float used;
+
+		if (load_uvmexp(&uvmexp)) {
+			used = (double) (uvmexp.active * uvmexp.pagesize) /
+			       1024 / 1024 / 1024;
+			return bprintf("%f", used);
+		}
+
+		return NULL;
+	}
 #endif
diff --git a/components/swap.c b/components/swap.c
index f3bbeb2..08a97de 100644
--- a/components/swap.c
+++ b/components/swap.c
@@ -1,138 +1,152 @@
 /* See LICENSE file for copyright and license details. */
 #if defined(__linux__)
-#include <errno.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) {
-		fprintf(stderr, "fopen '/proc/meminfo': %s\n", strerror(errno));
-		return NULL;
-	}
-
-	if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
-		fprintf(stderr, "fread '/proc/meminfo': %s\n", strerror(errno));
+	#include <errno.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) {
+			fprintf(stderr, "fopen '/proc/meminfo': %s\n",
+			        strerror(errno));
+			return NULL;
+		}
+
+		if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1,
+		                        fp)) == 0) {
+			fprintf(stderr, "fread '/proc/meminfo': %s\n",
+			        strerror(errno));
+			fclose(fp);
+			return NULL;
+		}
 		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) {
-		fprintf(stderr, "fopen '/proc/meminfo': %s\n", strerror(errno));
-		return NULL;
+
+		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);
 	}
 
-	if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
-		fprintf(stderr, "fread '/proc/meminfo': %s\n", strerror(errno));
+	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) {
+			fprintf(stderr, "fopen '/proc/meminfo': %s\n",
+			        strerror(errno));
+			return NULL;
+		}
+
+		if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1,
+		                        fp)) == 0) {
+			fprintf(stderr, "fread '/proc/meminfo': %s\n",
+			        strerror(errno));
+			fclose(fp);
+			return NULL;
+		}
 		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) {
-		fprintf(stderr, "fopen '/proc/meminfo': %s\n", strerror(errno));
-		return NULL;
+
+		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);
 	}
-	if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
-		fprintf(stderr, "fread '/proc/meminfo': %s\n", strerror(errno));
+
+	const char *
+	swap_total(void)
+	{
+		long total;
+		FILE *fp;
+		size_t bytes_read;
+		char *match;
+
+		fp = fopen("/proc/meminfo", "r");
+		if (fp == NULL) {
+			fprintf(stderr, "fopen '/proc/meminfo': %s\n",
+			        strerror(errno));
+			return NULL;
+		}
+		if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1,
+		                        fp)) == 0) {
+			fprintf(stderr, "fread '/proc/meminfo': %s\n",
+			        strerror(errno));
+			fclose(fp);
+			return NULL;
+		}
 		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) {
-		fprintf(stderr, "fopen '/proc/meminfo': %s\n", strerror(errno));
-		return NULL;
+
+		if ((match = strstr(buf, "SwapTotal")) == NULL)
+			return NULL;
+		sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+		return bprintf("%f", (float)total / 1024 / 1024);
 	}
-	if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
-		fprintf(stderr, "fread '/proc/meminfo': %s\n", strerror(errno));
+
+	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) {
+			fprintf(stderr, "fopen '/proc/meminfo': %s\n",
+			        strerror(errno));
+			return NULL;
+		}
+		if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1,
+		                        fp)) == 0) {
+			fprintf(stderr, "fread '/proc/meminfo': %s\n",
+			        strerror(errno));
+			fclose(fp);
+			return NULL;
+		}
 		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, "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, "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);
+		if ((match = strstr(buf, "SwapFree")) == NULL)
+			return NULL;
+		sscanf(match, "SwapFree: %ld kB\n", &free);
 
-	return bprintf("%f", (float)(total - free - cached) / 1024 / 1024);
-}
+		return bprintf("%f", (float)(total - free - cached) / 1024 / 1024);
+	}
+#elif defined(__OpenBSD__)
+	/* unimplemented */
 #endif
diff --git a/components/temperature.c b/components/temperature.c
index e2c6a77..1353993 100644
--- a/components/temperature.c
+++ b/components/temperature.c
@@ -1,45 +1,47 @@
 /* See LICENSE file for copyright and license details. */
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-#if defined(__OpenBSD__)
-#include <sys/sysctl.h>
-#include <sys/time.h>
-#include <sys/sensors.h>
-#endif
+#include <stddef.h>
 
 #include "../util.h"
 
 #if defined(__linux__)
-const char *
-temp(const char *file)
-{
-	int temp;
-
-	return (pscanf(file, "%d", &temp) == 1) ?
-	       bprintf("%d", temp / 1000) : NULL;
-}
-#elif defined(__OpenBSD__)
-const char *
-temp(const char *null)
-{
-	int mib[5];
-	size_t size;
-	struct sensor temp;
-
-	mib[0] = CTL_HW;
-	mib[1] = HW_SENSORS;
-	mib[2] = 0; /* cpu0 */
-	mib[3] = SENSOR_TEMP;
-	mib[4] = 0; /* temp0 */
-
-	size = sizeof(temp);
-
-	if (sysctl(mib, 5, &temp, &size, NULL, 0) == -1) {
-		fprintf(stderr, "sysctl 'SENSOR_TEMP': %s\n", strerror(errno));
-		return NULL;
+	const char *
+	temp(const char *file)
+	{
+		int temp;
+
+		return (pscanf(file, "%d", &temp) == 1) ?
+		       bprintf("%d", temp / 1000) : NULL;
 	}
+#elif defined(__OpenBSD__)
+	#include <errno.h>
+	#include <stdio.h>
+	#include <string.h>
+	#include <sys/sysctl.h>
+	#include <sys/time.h>
+	#include <sys/sensors.h>
+
+	const char *
+	temp(const char *null)
+	{
+		int mib[5];
+		size_t size;
+		struct sensor temp;
 
-	return bprintf("%d", (temp.value - 273150000) / 1000000); /* kelvin to celsius */
-}
+		mib[0] = CTL_HW;
+		mib[1] = HW_SENSORS;
+		mib[2] = 0; /* cpu0 */
+		mib[3] = SENSOR_TEMP;
+		mib[4] = 0; /* temp0 */
+
+		size = sizeof(temp);
+
+		if (sysctl(mib, 5, &temp, &size, NULL, 0) == -1) {
+			fprintf(stderr, "sysctl 'SENSOR_TEMP': %s\n",
+			        strerror(errno));
+			return NULL;
+		}
+
+		/* kelvin to celsius */
+		return bprintf("%d", (temp.value - 273150000) / 1000000);
+	}
 #endif
diff --git a/components/uptime.c b/components/uptime.c
index debe4cb..25f904c 100644
--- a/components/uptime.c
+++ b/components/uptime.c
@@ -2,62 +2,61 @@
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
-#if defined(__linux__)
-#include <sys/sysinfo.h>
-#elif defined(__OpenBSD__)
-#include <sys/sysctl.h>
-#include <sys/time.h>
-#endif
 
 #include "../util.h"
 
 #if defined(__linux__)
-const char *
-uptime(void)
-{
-	int h;
-	int m;
-	int uptime = 0;
-	struct sysinfo info;
-
-	sysinfo(&info);
-	uptime = info.uptime;
-
-	h = uptime / 3600;
-	m = (uptime - h * 3600) / 60;
-
-	return bprintf("%dh %dm", h, m);
-}
-#elif defined(__OpenBSD__)
-const char *
-uptime(void)
-{
-	int h;
-	int m;
-	int uptime = 0;
-
-	int mib[2];
-	size_t size;
-	time_t now;
-	struct timeval boottime;
-
-	time(&now);
-
-	mib[0] = CTL_KERN;
-	mib[1] = KERN_BOOTTIME;
-
-	size = sizeof(boottime);
-
-	if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1)
-		uptime = now - boottime.tv_sec;
-	else {
-		fprintf(stderr, "sysctl 'KERN_BOOTTIME': %s\n", strerror(errno));
-		return NULL;
+	#include <sys/sysinfo.h>
+
+	const char *
+	uptime(void)
+	{
+		int h;
+		int m;
+		int uptime = 0;
+		struct sysinfo info;
+
+		sysinfo(&info);
+		uptime = info.uptime;
+
+		h = uptime / 3600;
+		m = (uptime - h * 3600) / 60;
+
+		return bprintf("%dh %dm", h, m);
 	}
+#elif defined(__OpenBSD__)
+	#include <sys/sysctl.h>
+	#include <sys/time.h>
+
+	const char *
+	uptime(void)
+	{
+		int h;
+		int m;
+		int uptime = 0;
+
+		int mib[2];
+		size_t size;
+		time_t now;
+		struct timeval boottime;
+
+		time(&now);
 
-	h = uptime / 3600;
-	m = (uptime - h * 3600) / 60;
+		mib[0] = CTL_KERN;
+		mib[1] = KERN_BOOTTIME;
 
-	return bprintf("%dh %dm", h, m);
-}
+		size = sizeof(boottime);
+
+		if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1)
+			uptime = now - boottime.tv_sec;
+		else {
+			fprintf(stderr, "sysctl 'KERN_BOOTTIME': %s\n", strerror(errno));
+			return NULL;
+		}
+
+		h = uptime / 3600;
+		m = (uptime - h * 3600) / 60;
+
+		return bprintf("%dh %dm", h, m);
+	}
 #endif
diff --git a/components/wifi.c b/components/wifi.c
index 388a30d..33e09b7 100644
--- a/components/wifi.c
+++ b/components/wifi.c
@@ -1,92 +1,100 @@
 /* See LICENSE file for copyright and license details. */
 #if defined(__linux__)
-#include <errno.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 <errno.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"
+	#include "../util.h"
 
-const char *
-wifi_perc(const char *iface)
-{
-	int i, cur;
-	float perc;
-	int total = 70; /* the max of /proc/net/wireless */
-	char *p, *datastart;
-	char path[PATH_MAX];
-	char status[5];
-	FILE *fp;
+	const char *
+	wifi_perc(const char *iface)
+	{
+		int i, cur;
+		float perc;
+		int total = 70; /* the max of /proc/net/wireless */
+		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) {
-		fprintf(stderr, "fopen '%s': %s\n", path, strerror(errno));
-		return NULL;
-	}
-	p = fgets(status, 5, fp);
-	fclose(fp);
-	if(!p || strcmp(status, "up\n") != 0) {
-		return NULL;
-	}
+		snprintf(path, sizeof(path), "%s%s%s", "/sys/class/net/", iface,
+		         "/operstate");
+		fp = fopen(path, "r");
+		if (fp == NULL) {
+			fprintf(stderr, "fopen '%s': %s\n", path,
+			        strerror(errno));
+			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) {
-		fprintf(stderr, "fopen '/proc/net/wireless': %s\n", strerror(errno));
-		return NULL;
-	}
+		fp = fopen("/proc/net/wireless", "r");
+		if (fp == NULL) {
+			fprintf(stderr, "fopen '/proc/net/wireless': %s\n",
+			        strerror(errno));
+			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;
+		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;
 
-	if ((datastart = strstr(buf, iface)) == NULL)
-		return NULL;
+		datastart = (datastart+(strlen(iface)+1));
+		sscanf(datastart + 1, " %*d   %d  %*d  %*d\t\t  %*d\t   "
+		       "%*d\t\t%*d\t\t %*d\t  %*d\t\t %*d", &cur);
 
-	datastart = (datastart+(strlen(iface)+1));
-	sscanf(datastart + 1, " %*d   %d  %*d  %*d		  %*d	   %*d		%*d		 %*d	  %*d		 %*d", &cur);
+		perc = (float)cur / total * 100.0;
 
-	perc = (float)cur / total * 100.0;
+		return bprintf("%.0f", perc);
+	}
 
-	return bprintf("%.0f", 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;
 
-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);
 
-	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) {
+			fprintf(stderr, "socket 'AF_INET': %s\n",
+			        strerror(errno));
+			return NULL;
+		}
+		wreq.u.essid.pointer = id;
+		if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
+			fprintf(stderr, "ioctl 'SIOCGIWESSID': %s\n",
+			        strerror(errno));
+			close(sockfd);
+			return NULL;
+		}
 
-	if (sockfd == -1) {
-		fprintf(stderr, "socket 'AF_INET': %s\n", strerror(errno));
-		return NULL;
-	}
-	wreq.u.essid.pointer = id;
-	if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
-		fprintf(stderr, "ioctl 'SIOCGIWESSID': %s\n", strerror(errno));
 		close(sockfd);
-		return NULL;
-	}
 
-	close(sockfd);
-
-	if (strcmp(id, "") == 0)
-		return NULL;
-	else
-		return id;
-}
+		if (strcmp(id, "") == 0)
+			return NULL;
+		else
+			return id;
+	}
+#elif defined(__OpenBSD__)
+	/* unimplemented */
 #endif