Added battery status for laptop.

LICENSE

@@ -1,6 +1,6 @@
 ISC License
 
-Copyright 2016-2022 Aaron Marcher <me@drkhsh.at>
+Copyright 2016-2020 Aaron Marcher <me@drkhsh.at>
 
 Copyright 2016 Roy Freytag <rfreytag@hs-mittweida.de>
 Copyright 2016 Vincent Loupmon <vincentloupmon@gmail.com>
@@ -9,26 +9,23 @@ Copyright 2016-2018 Ali H. Fardan <raiz@firemail.cc>
 Copyright 2016 Jody Leonard <me@jodyleonard.com>
 Copyright 2016-2018 Quentin Rameau <quinq@fifth.space>
 Copyright 2016 Mike Coddington <mike@coddington.us>
-Copyright 2016-2018 Ivan J. <parazyd@dyne.org>
+Copyright 2016-2018 parazyd <parazyd@dyne.org>
 Copyright 2017 Tobias Stoeckmann <tobias@stoeckmann.org>
 Copyright 2017-2018 Laslo Hunhold <dev@frign.de>
 Copyright 2018 Darron Anderson <darronanderson@protonmail.com>
 Copyright 2018 Josuah Demangeon <mail@josuah.net>
 Copyright 2018 Tobias Tschinkowitz <tobias@he4d.net>
 Copyright 2018 David Demelier <markand@malikania.fr>
-Copyright 2018-2012 Michael Buch <michaelbuch12@gmail.com>
+Copyright 2018-2019 Michael Buch <michaelbuch12@gmail.com>
 Copyright 2018 Ian Remmler <ian@remmler.org>
 Copyright 2016-2019 Joerg Jung <jung@openbsd.org>
 Copyright 2019 Ryan Kes <alrayyes@gmail.com>
 Copyright 2019 Cem Keylan <cem@ckyln.com>
-Copyright 2019 Dimitris Papastamos <dsp@2f30.org>
-Copyright 2019-2022 Ingo Feinerer <feinerer@logic.at>
+Copyright 2019 dsp <dsp@2f30.org>
+Copyright 2019-2020 Ingo Feinerer <feinerer@logic.at>
 Copyright 2020 Alexandre Ratchov <alex@caoua.org>
 Copyright 2020 Mart Lubbers <mart@martlubbers.net>
 Copyright 2020 Daniel Moch <daniel@danielmoch.com>
-Copyright 2022 Nickolas Raymond Kaczynski <nrk@disroot.org>
-Copyright 2022 Patrick Iacob <iacobp@oregonstate.edu>
-Copyright 2021-2022 Steven Ward <planet36@gmail.com>
 
 Permission to use, copy, modify, and/or distribute this software for any
 purpose with or without fee is hereby granted, provided that the above

Makefile

@@ -7,7 +7,6 @@ include config.mk
 REQ = util
 COM =\
 	components/battery\
-	components/cat\
 	components/cpu\
 	components/datetime\
 	components/disk\
@@ -22,6 +21,7 @@ COM =\
 	components/num_files\
 	components/ram\
 	components/run_command\
+	components/separator\
 	components/swap\
 	components/temperature\
 	components/uptime\
@@ -31,7 +31,7 @@ COM =\
 
 all: slstatus
 
-$(COM:=.o): config.mk $(REQ:=.h) slstatus.h
+$(COM:=.o): config.mk $(REQ:=.h)
 slstatus.o: slstatus.c slstatus.h arg.h config.h config.mk $(REQ:=.h)
 
 .c.o:
@@ -44,15 +44,14 @@ slstatus: slstatus.o $(COM:=.o) $(REQ:=.o)
 	$(CC) -o $@ $(LDFLAGS) $(COM:=.o) $(REQ:=.o) slstatus.o $(LDLIBS)
 
 clean:
-	rm -f slstatus slstatus.o $(COM:=.o) $(REQ:=.o) slstatus-${VERSION}.tar.gz
+	rm -f slstatus slstatus.o $(COM:=.o) $(REQ:=.o)
 
 dist:
 	rm -rf "slstatus-$(VERSION)"
 	mkdir -p "slstatus-$(VERSION)/components"
 	cp -R LICENSE Makefile README config.mk config.def.h \
-	      arg.h slstatus.h slstatus.c $(REQ:=.c) $(REQ:=.h) \
+	      arg.h slstatus.c $(COM:=.c) $(REQ:=.c) $(REQ:=.h) \
 	      slstatus.1 "slstatus-$(VERSION)"
-	cp -R $(COM:=.c) "slstatus-$(VERSION)/components"
 	tar -cf - "slstatus-$(VERSION)" | gzip -c > "slstatus-$(VERSION).tar.gz"
 	rm -rf "slstatus-$(VERSION)"
 

README

@@ -1,15 +1,12 @@
 slstatus - suckless status
 ==========================
-slstatus is a small tool for providing system status information to other
-programs over the EWMH property of the root window (used by dwm(1)) or
-standard input/output. It is designed to be as efficient as possible by
-only issuing the minimum of system calls required.
+slstatus is a suckless status monitor for window managers that use WM_NAME
+(e.g. dwm) or stdin to fill the status bar.
 
 
 Features
 --------
 - Battery percentage/state/time left
-- Cat (read file)
 - CPU usage
 - CPU frequency
 - Custom shell commands
@@ -38,10 +35,6 @@ Requirements
 Currently slstatus works on FreeBSD, Linux and OpenBSD.
 In order to build slstatus you need the Xlib header files.
 
-- For volume percentage on Linux the kernel module `snd-mixer-oss` must be
-  loaded.
-- For volume percentage on FreeBSD, `sndio` must be installed.
-
 
 Installation
 ------------
@@ -63,3 +56,10 @@ Configuration
 -------------
 slstatus can be customized by creating a custom config.h and (re)compiling the
 source code. This keeps it fast, secure and simple.
+
+
+Upcoming
+--------
+
+A release (v1.0) will come soon... ;)
+After a long phase of inactivity, development has been continued!

components/battery.c

@@ -2,35 +2,26 @@
 #include <stdio.h>
 #include <string.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 #if defined(__linux__)
-/*
- * https://www.kernel.org/doc/html/latest/power/power_supply_class.html
- */
 	#include <limits.h>
 	#include <stdint.h>
 	#include <unistd.h>
 
-	#define POWER_SUPPLY_CAPACITY "/sys/class/power_supply/%s/capacity"
-	#define POWER_SUPPLY_STATUS   "/sys/class/power_supply/%s/status"
-	#define POWER_SUPPLY_CHARGE   "/sys/class/power_supply/%s/charge_now"
-	#define POWER_SUPPLY_ENERGY   "/sys/class/power_supply/%s/energy_now"
-	#define POWER_SUPPLY_CURRENT  "/sys/class/power_supply/%s/current_now"
-	#define POWER_SUPPLY_POWER    "/sys/class/power_supply/%s/power_now"
-
 	static const char *
 	pick(const char *bat, const char *f1, const char *f2, char *path,
 	     size_t length)
 	{
 		if (esnprintf(path, length, f1, bat) > 0 &&
-		    access(path, R_OK) == 0)
+		    access(path, R_OK) == 0) {
 			return f1;
+		}
 
 		if (esnprintf(path, length, f2, bat) > 0 &&
-		    access(path, R_OK) == 0)
+		    access(path, R_OK) == 0) {
 			return f2;
+		}
 
 		return NULL;
 	}
@@ -38,15 +29,18 @@
 	const char *
 	battery_perc(const char *bat)
 	{
-		int cap_perc;
+		int perc;
 		char path[PATH_MAX];
 
-		if (esnprintf(path, sizeof(path), POWER_SUPPLY_CAPACITY, bat) < 0)
+		if (esnprintf(path, sizeof(path),
+		              "/sys/class/power_supply/%s/capacity", bat) < 0) {
 			return NULL;
-		if (pscanf(path, "%d", &cap_perc) != 1)
+		}
+		if (pscanf(path, "%d", &perc) != 1) {
 			return NULL;
+		}
 
-		return bprintf("%d", cap_perc);
+		return bprintf("%d", perc);
 	}
 
 	const char *
@@ -59,20 +53,23 @@
 			{ "Charging",    "+" },
 			{ "Discharging", "-" },
 			{ "Full",        "o" },
-			{ "Not charging", "o" },
 		};
 		size_t i;
 		char path[PATH_MAX], state[12];
 
-		if (esnprintf(path, sizeof(path), POWER_SUPPLY_STATUS, bat) < 0)
+		if (esnprintf(path, sizeof(path),
+		              "/sys/class/power_supply/%s/status", bat) < 0) {
 			return NULL;
-		if (pscanf(path, "%12[a-zA-Z ]", state) != 1)
+		}
+		if (pscanf(path, "%12s", state) != 1) {
 			return NULL;
+		}
 
-		for (i = 0; i < LEN(map); i++)
-			if (!strcmp(map[i].state, state))
+		for (i = 0; i < LEN(map); i++) {
+			if (!strcmp(map[i].state, state)) {
 				break;
-
+			}
+		}
 		return (i == LEN(map)) ? "?" : map[i].symbol;
 	}
 
@@ -83,24 +80,32 @@
 		double timeleft;
 		char path[PATH_MAX], state[12];
 
-		if (esnprintf(path, sizeof(path), POWER_SUPPLY_STATUS, bat) < 0)
+		if (esnprintf(path, sizeof(path),
+		              "/sys/class/power_supply/%s/status", bat) < 0) {
 			return NULL;
-		if (pscanf(path, "%12[a-zA-Z ]", state) != 1)
+		}
+		if (pscanf(path, "%12s", state) != 1) {
 			return NULL;
+		}
 
-		if (!pick(bat, POWER_SUPPLY_CHARGE, POWER_SUPPLY_ENERGY, path,
+		if (!pick(bat, "/sys/class/power_supply/%s/charge_now",
+		          "/sys/class/power_supply/%s/energy_now", path,
 		          sizeof(path)) ||
-		    pscanf(path, "%ju", &charge_now) < 0)
+		    pscanf(path, "%ju", &charge_now) < 0) {
 			return NULL;
+		}
 
 		if (!strcmp(state, "Discharging")) {
-			if (!pick(bat, POWER_SUPPLY_CURRENT, POWER_SUPPLY_POWER, path,
+			if (!pick(bat, "/sys/class/power_supply/%s/current_now",
+			          "/sys/class/power_supply/%s/power_now", path,
 			          sizeof(path)) ||
-			    pscanf(path, "%ju", &current_now) < 0)
+			    pscanf(path, "%ju", &current_now) < 0) {
 				return NULL;
+			}
 
-			if (current_now == 0)
+			if (current_now == 0) {
 				return NULL;
+			}
 
 			timeleft = (double)charge_now / (double)current_now;
 			h = timeleft;
@@ -142,8 +147,9 @@
 	{
 		struct apm_power_info apm_info;
 
-		if (load_apm_power_info(&apm_info))
+		if (load_apm_power_info(&apm_info)) {
 			return bprintf("%d", apm_info.battery_life);
+		}
 
 		return NULL;
 	}
@@ -162,10 +168,11 @@
 		size_t i;
 
 		if (load_apm_power_info(&apm_info)) {
-			for (i = 0; i < LEN(map); i++)
-				if (map[i].state == apm_info.ac_state)
+			for (i = 0; i < LEN(map); i++) {
+				if (map[i].state == apm_info.ac_state) {
 					break;
-
+				}
+			}
 			return (i == LEN(map)) ? "?" : map[i].symbol;
 		}
 
@@ -176,13 +183,12 @@
 	battery_remaining(const char *unused)
 	{
 		struct apm_power_info apm_info;
-		unsigned int h, m;
 
 		if (load_apm_power_info(&apm_info)) {
 			if (apm_info.ac_state != APM_AC_ON) {
-				h = apm_info.minutes_left / 60;
-				m = apm_info.minutes_left % 60;
-				return bprintf("%uh %02um", h, m);
+				return bprintf("%uh %02um",
+			                       apm_info.minutes_left / 60,
+				               apm_info.minutes_left % 60);
 			} else {
 				return "";
 			}
@@ -193,21 +199,18 @@
 #elif defined(__FreeBSD__)
 	#include <sys/sysctl.h>
 
-	#define BATTERY_LIFE  "hw.acpi.battery.life"
-	#define BATTERY_STATE "hw.acpi.battery.state"
-	#define BATTERY_TIME  "hw.acpi.battery.time"
-
 	const char *
 	battery_perc(const char *unused)
 	{
-		int cap_perc;
+		int cap;
 		size_t len;
 
-		len = sizeof(cap_perc);
-		if (sysctlbyname(BATTERY_LIFE, &cap_perc, &len, NULL, 0) < 0 || !len)
+		len = sizeof(cap);
+		if (sysctlbyname("hw.acpi.battery.life", &cap, &len, NULL, 0) == -1
+				|| !len)
 			return NULL;
 
-		return bprintf("%d", cap_perc);
+		return bprintf("%d", cap);
 	}
 
 	const char *
@@ -217,11 +220,12 @@
 		size_t len;
 
 		len = sizeof(state);
-		if (sysctlbyname(BATTERY_STATE, &state, &len, NULL, 0) < 0 || !len)
+		if (sysctlbyname("hw.acpi.battery.state", &state, &len, NULL, 0) == -1
+				|| !len)
 			return NULL;
 
 		switch(state) {
-		case 0: /* FALLTHROUGH */
+			case 0:
 			case 2:
 				return "+";
 			case 1:
@@ -238,8 +242,9 @@
 		size_t len;
 
 		len = sizeof(rem);
-		if (sysctlbyname(BATTERY_TIME, &rem, &len, NULL, 0) < 0 || !len
-		    || rem < 0)
+		if (sysctlbyname("hw.acpi.battery.time", &rem, &len, NULL, 0) == -1
+				|| !len
+				|| rem == -1)
 			return NULL;
 
 		return bprintf("%uh %02um", rem / 60, rem % 60);

components/cat.c

@@ -1,32 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include <stdio.h>
-#include <string.h>
-
-#include "../slstatus.h"
-#include "../util.h"
-
-const char *
-cat(const char *path)
-{
-        char *f;
-        FILE *fp;
-
-        if (!(fp = fopen(path, "r"))) {
-                warn("fopen '%s':", path);
-                return NULL;
-        }
-
-        f = fgets(buf, sizeof(buf) - 1, fp);
-        if (fclose(fp) < 0) {
-                warn("fclose '%s':", path);
-                return NULL;
-        }
-        if (!f)
-                return NULL;
-
-        if ((f = strrchr(buf, '\n')))
-                f[0] = '\0';
-
-        return buf[0] ? buf : NULL;
-}
-

components/cpu.c

@@ -3,26 +3,25 @@
 #include <stdio.h>
 #include <string.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 #if defined(__linux__)
-	#define CPU_FREQ "/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq"
-
 	const char *
-	cpu_freq(const char *unused)
+	cpu_freq(void)
 	{
 		uintmax_t freq;
 
 		/* in kHz */
-		if (pscanf(CPU_FREQ, "%ju", &freq) != 1)
+		if (pscanf("/sys/devices/system/cpu/cpu0/cpufreq/"
+		           "scaling_cur_freq", "%ju", &freq) != 1) {
 			return NULL;
+		}
 
 		return fmt_human(freq * 1000, 1000);
 	}
 
 	const char *
-	cpu_perc(const char *unused)
+	cpu_perc(void)
 	{
 		static long double a[7];
 		long double b[7], sum;
@@ -31,17 +30,19 @@
 		/* cpu user nice system idle iowait irq softirq */
 		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)
+		    != 7) {
 			return NULL;
-
-		if (b[0] == 0)
+		}
+		if (b[0] == 0) {
 			return NULL;
+		}
 
 		sum = (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]);
 
-		if (sum == 0)
+		if (sum == 0) {
 			return NULL;
+		}
 
 		return bprintf("%d", (int)(100 *
 		               ((b[0] + b[1] + b[2] + b[5] + b[6]) -
@@ -53,7 +54,7 @@
 	#include <sys/sysctl.h>
 
 	const char *
-	cpu_freq(const char *unused)
+	cpu_freq(void)
 	{
 		int freq, mib[2];
 		size_t size;
@@ -73,7 +74,7 @@
 	}
 
 	const char *
-	cpu_perc(const char *unused)
+	cpu_perc(void)
 	{
 		int mib[2];
 		static uintmax_t a[CPUSTATES];
@@ -90,14 +91,16 @@
 			warn("sysctl 'KERN_CPTIME':");
 			return NULL;
 		}
-		if (b[0] == 0)
+		if (b[0] == 0) {
 			return NULL;
+		}
 
 		sum = (a[CP_USER] + a[CP_NICE] + a[CP_SYS] + a[CP_INTR] + a[CP_IDLE]) -
 		      (b[CP_USER] + b[CP_NICE] + b[CP_SYS] + b[CP_INTR] + b[CP_IDLE]);
 
-		if (sum == 0)
+		if (sum == 0) {
 			return NULL;
+		}
 
 		return bprintf("%d", 100 *
 		               ((a[CP_USER] + a[CP_NICE] + a[CP_SYS] +
@@ -106,19 +109,20 @@
 		                 b[CP_INTR])) / sum);
 	}
 #elif defined(__FreeBSD__)
-	#include <devstat.h>
 	#include <sys/param.h>
 	#include <sys/sysctl.h>
+	#include <devstat.h>
 
 	const char *
-	cpu_freq(const char *unused)
+	cpu_freq(void)
 	{
 		int freq;
 		size_t size;
 
 		size = sizeof(freq);
 		/* in MHz */
-		if (sysctlbyname("hw.clockrate", &freq, &size, NULL, 0) < 0 || !size) {
+		if (sysctlbyname("hw.clockrate", &freq, &size, NULL, 0) == -1
+				|| !size) {
 			warn("sysctlbyname 'hw.clockrate':");
 			return NULL;
 		}
@@ -127,7 +131,7 @@
 	}
 
 	const char *
-	cpu_perc(const char *unused)
+	cpu_perc(void)
 	{
 		size_t size;
 		static long a[CPUSTATES];
@@ -135,18 +139,21 @@
 
 		size = sizeof(a);
 		memcpy(b, a, sizeof(b));
-		if (sysctlbyname("kern.cp_time", &a, &size, NULL, 0) < 0 || !size) {
+		if (sysctlbyname("kern.cp_time", &a, &size, NULL, 0) == -1
+				|| !size) {
 			warn("sysctlbyname 'kern.cp_time':");
 			return NULL;
 		}
-		if (b[0] == 0)
+		if (b[0] == 0) {
 			return NULL;
+		}
 
 		sum = (a[CP_USER] + a[CP_NICE] + a[CP_SYS] + a[CP_INTR] + a[CP_IDLE]) -
 		      (b[CP_USER] + b[CP_NICE] + b[CP_SYS] + b[CP_INTR] + b[CP_IDLE]);
 
-		if (sum == 0)
+		if (sum == 0) {
 			return NULL;
+		}
 
 		return bprintf("%d", 100 *
 		               ((a[CP_USER] + a[CP_NICE] + a[CP_SYS] +

components/datetime.c

@@ -2,7 +2,6 @@
 #include <stdio.h>
 #include <time.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 const char *

components/disk.c

@@ -2,7 +2,6 @@
 #include <stdio.h>
 #include <sys/statvfs.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 const char *
@@ -29,7 +28,7 @@ disk_perc(const char *path)
 	}
 
 	return bprintf("%d", (int)(100 *
-	               (1 - ((double)fs.f_bavail / (double)fs.f_blocks))));
+	               (1.0f - ((float)fs.f_bavail / (float)fs.f_blocks))));
 }
 
 const char *

components/entropy.c

@@ -1,29 +1,27 @@
 /* See LICENSE file for copyright and license details. */
-#include "../slstatus.h"
 #if defined(__linux__)
 	#include <stdint.h>
 	#include <stdio.h>
 
 	#include "../util.h"
 
-	#define ENTROPY_AVAIL "/proc/sys/kernel/random/entropy_avail"
-
 	const char *
-	entropy(const char *unused)
+	entropy(void)
 	{
 		uintmax_t num;
 
-		if (pscanf(ENTROPY_AVAIL, "%ju", &num) != 1)
+		if (pscanf("/proc/sys/kernel/random/entropy_avail", "%ju", &num)
+		    != 1) {
 			return NULL;
+		}
 
 		return bprintf("%ju", num);
 	}
 #elif defined(__OpenBSD__) | defined(__FreeBSD__)
 	const char *
-	entropy(const char *unused)
+	entropy(void)
 	{
-		// https://www.unicode.org/charts/PDF/U2200.pdf
 		/* Unicode Character 'INFINITY' (U+221E) */
-		return "\u221E";
+		return "\xe2\x88\x9e";
 	}
 #endif

components/hostname.c

@@ -2,11 +2,10 @@
 #include <stdio.h>
 #include <unistd.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 const char *
-hostname(const char *unused)
+hostname(void)
 {
 	if (gethostname(buf, sizeof(buf)) < 0) {
 		warn("gethostbyname:");

components/ip.c

@@ -4,14 +4,13 @@
 #include <stdio.h>
 #include <string.h>
 #if defined(__OpenBSD__)
-	#include <sys/socket.h>
 	#include <sys/types.h>
+	#include <sys/socket.h>
 #elif defined(__FreeBSD__)
 	#include <netinet/in.h>
 	#include <sys/socket.h>
 #endif
 
-#include "../slstatus.h"
 #include "../util.h"
 
 static const char *
@@ -27,9 +26,9 @@ ip(const char *interface, unsigned short sa_family)
 	}
 
 	for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
-		if (!ifa->ifa_addr)
+		if (!ifa->ifa_addr) {
 			continue;
-
+		}
 		s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in6),
 		                host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
 		if (!strcmp(ifa->ifa_name, interface) &&

components/kernel_release.c

@@ -1,12 +1,11 @@
 /* See LICENSE file for copyright and license details. */
-#include <stdio.h>
 #include <sys/utsname.h>
+#include <stdio.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 const char *
-kernel_release(const char *unused)
+kernel_release(void)
 {
 	struct utsname udata;
 

components/keyboard_indicators.c

@@ -4,7 +4,6 @@
 #include <string.h>
 #include <X11/Xlib.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 /*
@@ -33,18 +32,17 @@ keyboard_indicators(const char *fmt)
 	fmtlen = strnlen(fmt, 4);
 	for (i = n = 0; i < fmtlen; i++) {
 		key = tolower(fmt[i]);
-		if (key != 'c' && key != 'n')
+		if (key != 'c' && key != 'n') {
 			continue;
-
+		}
 		togglecase = (i + 1 >= fmtlen || fmt[i + 1] != '?');
 		isset = (state.led_mask & (1 << (key == 'n')));
-
-		if (togglecase)
+		if (togglecase) {
 			buf[n++] = isset ? toupper(key) : key;
-		else if (isset)
+		} else if (isset) {
 			buf[n++] = fmt[i];
 		}
-
+	}
 	buf[n] = 0;
 	return buf;
 }

components/keymap.c

@@ -5,7 +5,6 @@
 #include <X11/XKBlib.h>
 #include <X11/Xlib.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 static int
@@ -15,9 +14,11 @@ valid_layout_or_variant(char *sym)
 	/* invalid symbols from xkb rules config */
 	static const char *invalid[] = { "evdev", "inet", "pc", "base" };
 
-	for (i = 0; i < LEN(invalid); i++)
-		if (!strncmp(sym, invalid[i], strlen(invalid[i])))
+	for (i = 0; i < LEN(invalid); i++) {
+		if (!strncmp(sym, invalid[i], strlen(invalid[i]))) {
 			return 0;
+		}
+	}
 
 	return 1;
 }
@@ -45,13 +46,12 @@ get_layout(char *syms, int grp_num)
 }
 
 const char *
-keymap(const char *unused)
+keymap(void)
 {
 	Display *dpy;
 	XkbDescRec *desc;
 	XkbStateRec state;
-	char *symbols;
-	const char *layout;
+	char *symbols, *layout;
 
 	layout = NULL;
 
@@ -75,12 +75,13 @@ keymap(const char *unused)
 		warn("XGetAtomName: Failed to get atom name");
 		goto end;
 	}
-	layout = bprintf("%s", get_layout(symbols, state.group));
+	layout = (char *)bprintf("%s", get_layout(symbols, state.group));
 	XFree(symbols);
 end:
 	XkbFreeKeyboard(desc, XkbSymbolsNameMask, 1);
-	if (XCloseDisplay(dpy))
+	if (XCloseDisplay(dpy)) {
 		warn("XCloseDisplay: Failed to close display");
+	}
 
 	return layout;
 }

components/load_avg.c

@@ -2,11 +2,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 const char *
-load_avg(const char *unused)
+load_avg(void)
 {
 	double avgs[3];
 

components/netspeeds.c

@@ -1,16 +1,12 @@
 /* See LICENSE file for copyright and license details. */
-#include <limits.h>
 #include <stdio.h>
+#include <limits.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 #if defined(__linux__)
 	#include <stdint.h>
 
-	#define NET_RX_BYTES "/sys/class/net/%s/statistics/rx_bytes"
-	#define NET_TX_BYTES "/sys/class/net/%s/statistics/tx_bytes"
-
 	const char *
 	netspeed_rx(const char *interface)
 	{
@@ -21,12 +17,17 @@
 
 		oldrxbytes = rxbytes;
 
-		if (esnprintf(path, sizeof(path), NET_RX_BYTES, interface) < 0)
+		if (esnprintf(path, sizeof(path),
+		              "/sys/class/net/%s/statistics/rx_bytes",
+		              interface) < 0) {
 			return NULL;
-		if (pscanf(path, "%ju", &rxbytes) != 1)
+		}
+		if (pscanf(path, "%ju", &rxbytes) != 1) {
 			return NULL;
-		if (oldrxbytes == 0)
+		}
+		if (oldrxbytes == 0) {
 			return NULL;
+		}
 
 		return fmt_human((rxbytes - oldrxbytes) * 1000 / interval,
 		                 1024);
@@ -42,22 +43,27 @@
 
 		oldtxbytes = txbytes;
 
-		if (esnprintf(path, sizeof(path), NET_TX_BYTES, interface) < 0)
+		if (esnprintf(path, sizeof(path),
+		              "/sys/class/net/%s/statistics/tx_bytes",
+		              interface) < 0) {
 			return NULL;
-		if (pscanf(path, "%ju", &txbytes) != 1)
+		}
+		if (pscanf(path, "%ju", &txbytes) != 1) {
 			return NULL;
-		if (oldtxbytes == 0)
+		}
+		if (oldtxbytes == 0) {
 			return NULL;
+		}
 
 		return fmt_human((txbytes - oldtxbytes) * 1000 / interval,
 		                 1024);
 	}
 #elif defined(__OpenBSD__) | defined(__FreeBSD__)
-	#include <ifaddrs.h>
-	#include <net/if.h>
 	#include <string.h>
+	#include <ifaddrs.h>
 	#include <sys/types.h>
 	#include <sys/socket.h>
+	#include <net/if.h>
 
 	const char *
 	netspeed_rx(const char *interface)
@@ -71,23 +77,25 @@
 
 		oldrxbytes = rxbytes;
 
-		if (getifaddrs(&ifal) < 0) {
+		if (getifaddrs(&ifal) == -1) {
 			warn("getifaddrs failed");
 			return NULL;
 		}
 		rxbytes = 0;
-		for (ifa = ifal; ifa; ifa = ifa->ifa_next)
+		for (ifa = ifal; ifa; ifa = ifa->ifa_next) {
 			if (!strcmp(ifa->ifa_name, interface) &&
-			   (ifd = (struct if_data *)ifa->ifa_data))
+			   (ifd = (struct if_data *)ifa->ifa_data)) {
 				rxbytes += ifd->ifi_ibytes, if_ok = 1;
-
+			}
+		}
 		freeifaddrs(ifal);
 		if (!if_ok) {
 			warn("reading 'if_data' failed");
 			return NULL;
 		}
-		if (oldrxbytes == 0)
+		if (oldrxbytes == 0) {
 			return NULL;
+		}
 
 		return fmt_human((rxbytes - oldrxbytes) * 1000 / interval,
 		                 1024);
@@ -105,23 +113,25 @@
 
 		oldtxbytes = txbytes;
 
-		if (getifaddrs(&ifal) < 0) {
+		if (getifaddrs(&ifal) == -1) {
 			warn("getifaddrs failed");
 			return NULL;
 		}
 		txbytes = 0;
-		for (ifa = ifal; ifa; ifa = ifa->ifa_next)
+		for (ifa = ifal; ifa; ifa = ifa->ifa_next) {
 			if (!strcmp(ifa->ifa_name, interface) &&
-			   (ifd = (struct if_data *)ifa->ifa_data))
+			   (ifd = (struct if_data *)ifa->ifa_data)) {
 				txbytes += ifd->ifi_obytes, if_ok = 1;
-
+			}
+		}
 		freeifaddrs(ifal);
 		if (!if_ok) {
 			warn("reading 'if_data' failed");
 			return NULL;
 		}
-		if (oldtxbytes == 0)
+		if (oldtxbytes == 0) {
 			return NULL;
+		}
 
 		return fmt_human((txbytes - oldtxbytes) * 1000 / interval,
 		                 1024);

components/num_files.c

@@ -3,30 +3,29 @@
 #include <stdio.h>
 #include <string.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 const char *
 num_files(const char *path)
 {
 	struct dirent *dp;
-	DIR *dir;
+	DIR *fd;
 	int num;
 
-	if (!(dir = opendir(path))) {
+	if (!(fd = opendir(path))) {
 		warn("opendir '%s':", path);
 		return NULL;
 	}
 
 	num = 0;
-	while ((dp = readdir(dir))) {
-		if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
+	while ((dp = readdir(fd))) {
+		if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) {
 			continue; /* skip self and parent */
-
+		}
 		num++;
 	}
 
-	closedir(dir);
+	closedir(fd);
 
 	return bprintf("%d", num);
 }

components/ram.c

@@ -1,14 +1,13 @@
 /* See LICENSE file for copyright and license details. */
 #include <stdio.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 #if defined(__linux__)
 	#include <stdint.h>
 
 	const char *
-	ram_free(const char *unused)
+	ram_free(void)
 	{
 		uintmax_t free;
 
@@ -16,17 +15,17 @@
 		           "MemTotal: %ju kB\n"
 		           "MemFree: %ju kB\n"
 		           "MemAvailable: %ju kB\n",
-		           &free, &free, &free) != 3)
+		           &free, &free, &free) != 3) {
 			return NULL;
+		}
 
 		return fmt_human(free * 1024, 1024);
 	}
 
 	const char *
-	ram_perc(const char *unused)
+	ram_perc(void)
 	{
 		uintmax_t total, free, buffers, cached;
-		int percent;
 
 		if (pscanf("/proc/meminfo",
 		           "MemTotal: %ju kB\n"
@@ -34,32 +33,35 @@
 		           "MemAvailable: %ju kB\n"
 		           "Buffers: %ju kB\n"
 		           "Cached: %ju kB\n",
-		           &total, &free, &buffers, &buffers, &cached) != 5)
+		           &total, &free, &buffers, &buffers, &cached) != 5) {
 			return NULL;
+		}
 
-		if (total == 0)
+		if (total == 0) {
 			return NULL;
+		}
 
-		percent = 100 * ((total - free) - (buffers + cached)) / total;
-		return bprintf("%d", percent);
+		return bprintf("%d", 100 * ((total - free) - (buffers + cached))
+                               / total);
 	}
 
 	const char *
-	ram_total(const char *unused)
+	ram_total(void)
 	{
 		uintmax_t total;
 
 		if (pscanf("/proc/meminfo", "MemTotal: %ju kB\n", &total)
-		    != 1)
+		    != 1) {
 			return NULL;
+		}
 
 		return fmt_human(total * 1024, 1024);
 	}
 
 	const char *
-	ram_used(const char *unused)
+	ram_used(void)
 	{
-		uintmax_t total, free, buffers, cached, used;
+		uintmax_t total, free, buffers, cached;
 
 		if (pscanf("/proc/meminfo",
 		           "MemTotal: %ju kB\n"
@@ -67,11 +69,12 @@
 		           "MemAvailable: %ju kB\n"
 		           "Buffers: %ju kB\n"
 		           "Cached: %ju kB\n",
-		           &total, &free, &buffers, &buffers, &cached) != 5)
+		           &total, &free, &buffers, &buffers, &cached) != 5) {
 			return NULL;
+		}
 
-		used = (total - free - buffers - cached);
-		return fmt_human(used * 1024, 1024);
+		return fmt_human((total - free - buffers - cached) * 1024,
+		                 1024);
 	}
 #elif defined(__OpenBSD__)
 	#include <stdlib.h>
@@ -90,61 +93,68 @@
 
 		size = sizeof(*uvmexp);
 
-		if (sysctl(uvmexp_mib, 2, uvmexp, &size, NULL, 0) >= 0)
+		if (sysctl(uvmexp_mib, 2, uvmexp, &size, NULL, 0) >= 0) {
 			return 1;
+		}
 
 		return 0;
 	}
 
 	const char *
-	ram_free(const char *unused)
+	ram_free(void)
 	{
 		struct uvmexp uvmexp;
 		int free_pages;
 
-		if (!load_uvmexp(&uvmexp))
-			return NULL;
-
+		if (load_uvmexp(&uvmexp)) {
 			free_pages = uvmexp.npages - uvmexp.active;
 			return fmt_human(pagetok(free_pages, uvmexp.pageshift) *
 			                 1024, 1024);
 		}
 
+		return NULL;
+	}
+
 	const char *
-	ram_perc(const char *unused)
+	ram_perc(void)
 	{
 		struct uvmexp uvmexp;
 		int percent;
 
-		if (!load_uvmexp(&uvmexp))
-			return NULL;
-
+		if (load_uvmexp(&uvmexp)) {
 			percent = uvmexp.active * 100 / uvmexp.npages;
 			return bprintf("%d", percent);
 		}
 
-	const char *
-	ram_total(const char *unused)
-	{
-		struct uvmexp uvmexp;
-
-		if (!load_uvmexp(&uvmexp))
 		return NULL;
-
-		return fmt_human(pagetok(uvmexp.npages,
-					 uvmexp.pageshift) * 1024, 1024);
 	}
 
 	const char *
-	ram_used(const char *unused)
+	ram_total(void)
 	{
 		struct uvmexp uvmexp;
 
-		if (!load_uvmexp(&uvmexp))
-			return NULL;
+		if (load_uvmexp(&uvmexp)) {
+			return fmt_human(pagetok(uvmexp.npages,
+			                         uvmexp.pageshift) * 1024,
+			                 1024);
+		}
 
+		return NULL;
+	}
+
+	const char *
+	ram_used(void)
+	{
+		struct uvmexp uvmexp;
+
+		if (load_uvmexp(&uvmexp)) {
 			return fmt_human(pagetok(uvmexp.active,
-					 uvmexp.pageshift) * 1024, 1024);
+			                         uvmexp.pageshift) * 1024,
+			                 1024);
+		}
+
+		return NULL;
 	}
 #elif defined(__FreeBSD__)
 	#include <sys/sysctl.h>
@@ -153,13 +163,13 @@
 	#include <vm/vm_param.h>
 
 	const char *
-	ram_free(const char *unused) {
+	ram_free(void) {
 		struct vmtotal vm_stats;
 		int mib[] = {CTL_VM, VM_TOTAL};
 		size_t len;
 
 		len = sizeof(struct vmtotal);
-		if (sysctl(mib, 2, &vm_stats, &len, NULL, 0) < 0
+		if (sysctl(mib, 2, &vm_stats, &len, NULL, 0) == -1
 				|| !len)
 			return NULL;
 
@@ -167,44 +177,44 @@
 	}
 
 	const char *
-	ram_total(const char *unused) {
-		unsigned int npages;
+	ram_total(void) {
+		long npages;
 		size_t len;
 
 		len = sizeof(npages);
-		if (sysctlbyname("vm.stats.vm.v_page_count",
-		                 &npages, &len, NULL, 0) < 0 || !len)
+		if (sysctlbyname("vm.stats.vm.v_page_count", &npages, &len, NULL, 0) == -1
+				|| !len)
 			return NULL;
 
 		return fmt_human(npages * getpagesize(), 1024);
 	}
 
 	const char *
-	ram_perc(const char *unused) {
-		unsigned int npages;
-		unsigned int active;
+	ram_perc(void) {
+		long npages;
+		long active;
 		size_t len;
 
 		len = sizeof(npages);
-		if (sysctlbyname("vm.stats.vm.v_page_count",
-		                 &npages, &len, NULL, 0) < 0 || !len)
+		if (sysctlbyname("vm.stats.vm.v_page_count", &npages, &len, NULL, 0) == -1
+				|| !len)
 			return NULL;
 
-		if (sysctlbyname("vm.stats.vm.v_active_count",
-		                 &active, &len, NULL, 0) < 0 || !len)
+		if (sysctlbyname("vm.stats.vm.v_active_count", &active, &len, NULL, 0) == -1
+				|| !len)
 			return NULL;
 
 		return bprintf("%d", active * 100 / npages);
 	}
 
 	const char *
-	ram_used(const char *unused) {
-		unsigned int active;
+	ram_used(void) {
+		long active;
 		size_t len;
 
 		len = sizeof(active);
-		if (sysctlbyname("vm.stats.vm.v_active_count",
-		                 &active, &len, NULL, 0) < 0 || !len)
+		if (sysctlbyname("vm.stats.vm.v_active_count", &active, &len, NULL, 0) == -1
+				|| !len)
 			return NULL;
 
 		return fmt_human(active * getpagesize(), 1024);

components/run_command.c

@@ -2,7 +2,6 @@
 #include <stdio.h>
 #include <string.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 const char *
@@ -15,17 +14,17 @@ run_command(const char *cmd)
 		warn("popen '%s':", cmd);
 		return NULL;
 	}
-
 	p = fgets(buf, sizeof(buf) - 1, fp);
 	if (pclose(fp) < 0) {
 		warn("pclose '%s':", cmd);
 		return NULL;
 	}
-	if (!p)
+	if (!p) {
 		return NULL;
-
-	if ((p = strrchr(buf, '\n')))
+	}
+	if ((p = strrchr(buf, '\n'))) {
 		p[0] = '\0';
+	}
 
 	return buf[0] ? buf : NULL;
 }

components/separator.c

@@ -0,0 +1,10 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+
+#include "../util.h"
+
+const char *
+separator(const char *separator)
+{
+    return separator;
+}

components/swap.c

@@ -4,7 +4,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 #if defined(__linux__)
@@ -25,9 +24,11 @@
 		char *line = NULL;
 
 		/* get number of fields we want to extract */
-		for (i = 0, left = 0; i < LEN(ent); i++)
-			if (ent[i].var)
+		for (i = 0, left = 0; i < LEN(ent); i++) {
+			if (ent[i].var) {
 				left++;
+			}
+		}
 
 		if (!(fp = fopen("/proc/meminfo", "r"))) {
 			warn("fopen '/proc/meminfo':");
@@ -57,45 +58,49 @@
 	}
 
 	const char *
-	swap_free(const char *unused)
+	swap_free(void)
 	{
 		long free;
 
-		if (get_swap_info(NULL, &free, NULL))
+		if (get_swap_info(NULL, &free, NULL)) {
 			return NULL;
+		}
 
 		return fmt_human(free * 1024, 1024);
 	}
 
 	const char *
-	swap_perc(const char *unused)
+	swap_perc(void)
 	{
 		long total, free, cached;
 
-		if (get_swap_info(&total, &free, &cached) || total == 0)
+		if (get_swap_info(&total, &free, &cached) || total == 0) {
 			return NULL;
+		}
 
 		return bprintf("%d", 100 * (total - free - cached) / total);
 	}
 
 	const char *
-	swap_total(const char *unused)
+	swap_total(void)
 	{
 		long total;
 
-		if (get_swap_info(&total, NULL, NULL))
+		if (get_swap_info(&total, NULL, NULL)) {
 			return NULL;
+		}
 
 		return fmt_human(total * 1024, 1024);
 	}
 
 	const char *
-	swap_used(const char *unused)
+	swap_used(void)
 	{
 		long total, free, cached;
 
-		if (get_swap_info(&total, &free, &cached))
+		if (get_swap_info(&total, &free, &cached)) {
 			return NULL;
+		}
 
 		return fmt_human((total - free - cached) * 1024, 1024);
 	}
@@ -142,57 +147,62 @@
 	}
 
 	const char *
-	swap_free(const char *unused)
+	swap_free(void)
 	{
 		int total, used;
 
-		if (getstats(&total, &used))
+		if (getstats(&total, &used)) {
 			return NULL;
+		}
 
 		return fmt_human((total - used) * 1024, 1024);
 	}
 
 	const char *
-	swap_perc(const char *unused)
+	swap_perc(void)
 	{
 		int total, used;
 
-		if (getstats(&total, &used))
+		if (getstats(&total, &used)) {
 			return NULL;
+		}
 
-		if (total == 0)
+		if (total == 0) {
 			return NULL;
+		}
 
 		return bprintf("%d", 100 * used / total);
 	}
 
 	const char *
-	swap_total(const char *unused)
+	swap_total(void)
 	{
 		int total, used;
 
-		if (getstats(&total, &used))
+		if (getstats(&total, &used)) {
 			return NULL;
+		}
 
 		return fmt_human(total * 1024, 1024);
 	}
 
 	const char *
-	swap_used(const char *unused)
+	swap_used(void)
 	{
 		int total, used;
 
-		if (getstats(&total, &used))
+		if (getstats(&total, &used)) {
 			return NULL;
+		}
 
 		return fmt_human(used * 1024, 1024);
 	}
 #elif defined(__FreeBSD__)
-	#include <fcntl.h>
-	#include <kvm.h>
 	#include <stdlib.h>
 	#include <sys/types.h>
+	#include <fcntl.h>
 	#include <unistd.h>
+	#include <kvm.h>
 
 	static int getswapinfo(struct kvm_swap *swap_info, size_t size)
 	{
@@ -204,7 +214,7 @@
 			return 0;
 		}
 
-		if (kvm_getswapinfo(kd, swap_info, size, 0 /* Unused flags */) < 0) {
+		if(kvm_getswapinfo(kd, swap_info, size, 0 /* Unused flags */) == -1) {
 			warn("kvm_getswapinfo:");
 			kvm_close(kd);
 			return 0;
@@ -215,7 +225,7 @@
 	}
 
 	const char *
-	swap_free(const char *unused)
+	swap_free(void)
 	{
 		struct kvm_swap swap_info[1];
 		long used, total;
@@ -230,7 +240,7 @@
 	}
 
 	const char *
-	swap_perc(const char *unused)
+	swap_perc(void)
 	{
 		struct kvm_swap swap_info[1];
 		long used, total;
@@ -245,7 +255,7 @@
 	}
 
 	const char *
-	swap_total(const char *unused)
+	swap_total(void)
 	{
 		struct kvm_swap swap_info[1];
 		long total;
@@ -259,7 +269,7 @@
 	}
 
 	const char *
-	swap_used(const char *unused)
+	swap_used(void)
 	{
 		struct kvm_swap swap_info[1];
 		long used;

components/temperature.c

@@ -1,7 +1,6 @@
 /* See LICENSE file for copyright and license details. */
 #include <stddef.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 
@@ -13,8 +12,9 @@
 	{
 		uintmax_t temp;
 
-		if (pscanf(file, "%ju", &temp) != 1)
+		if (pscanf(file, "%ju", &temp) != 1) {
 			return NULL;
+		}
 
 		return bprintf("%ju", temp / 1000);
 	}
@@ -52,8 +52,6 @@
 	#include <stdlib.h>
 	#include <sys/sysctl.h>
 
-	#define ACPI_TEMP "hw.acpi.thermal.%s.temperature"
-
 	const char *
 	temp(const char *zone)
 	{
@@ -62,8 +60,8 @@
 		size_t len;
 
 		len = sizeof(temp);
-		snprintf(buf, sizeof(buf), ACPI_TEMP, zone);
-		if (sysctlbyname(buf, &temp, &len, NULL, 0) < 0
+		snprintf(buf, sizeof(buf), "hw.acpi.thermal.%s.temperature", zone);
+		if (sysctlbyname(buf, &temp, &len, NULL, 0) == -1
 				|| !len)
 			return NULL;
 

components/uptime.c

@@ -3,7 +3,6 @@
 #include <stdio.h>
 #include <time.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 #if defined(CLOCK_BOOTTIME)
@@ -15,14 +14,14 @@
 #endif
 
 const char *
-uptime(const char *unused)
+uptime(void)
 {
 	char warn_buf[256];
 	uintmax_t h, m;
 	struct timespec uptime;
 
 	if (clock_gettime(UPTIME_FLAG, &uptime) < 0) {
-		snprintf(warn_buf, sizeof(warn_buf), "clock_gettime %d", UPTIME_FLAG);
+		snprintf(warn_buf, 256, "clock_gettime %d", UPTIME_FLAG);
 		warn(warn_buf);
 		return NULL;
 	}

components/user.c

@@ -4,17 +4,16 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 const char *
-gid(const char *unused)
+gid(void)
 {
 	return bprintf("%d", getgid());
 }
 
 const char *
-username(const char *unused)
+username(void)
 {
 	struct passwd *pw;
 
@@ -27,7 +26,7 @@ username(const char *unused)
 }
 
 const char *
-uid(const char *unused)
+uid(void)
 {
 	return bprintf("%d", geteuid());
 }

components/volume.c

@@ -5,14 +5,13 @@
 #include <sys/ioctl.h>
 #include <unistd.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
-#if defined(__OpenBSD__) | defined(__FreeBSD__)
+#if defined(__OpenBSD__)
+	#include <sys/queue.h>
 	#include <poll.h>
 	#include <sndio.h>
 	#include <stdlib.h>
-	#include <sys/queue.h>
 
 	struct control {
 		LIST_ENTRY(control)	next;
@@ -162,7 +161,6 @@
 				if (sioctl_revents(hdl, pfds) & POLLHUP) {
 					warn("sndio: disconnected");
 					cleanup();
-					initialized = 0;
 					return NULL;
 				}
 			}

components/wifi.c

@@ -6,7 +6,6 @@
 #include <sys/socket.h>
 #include <unistd.h>
 
-#include "../slstatus.h"
 #include "../util.h"
 
 #define RSSI_TO_PERC(rssi) \
@@ -18,8 +17,6 @@
 	#include <limits.h>
 	#include <linux/wireless.h>
 
-	#define NET_OPERSTATE "/sys/class/net/%s/operstate"
-
 	const char *
 	wifi_perc(const char *interface)
 	{
@@ -30,32 +27,37 @@
 		char status[5];
 		FILE *fp;
 
-		if (esnprintf(path, sizeof(path), NET_OPERSTATE, interface) < 0)
+		if (esnprintf(path, sizeof(path), "/sys/class/net/%s/operstate",
+		              interface) < 0) {
 			return NULL;
+		}
 		if (!(fp = fopen(path, "r"))) {
 			warn("fopen '%s':", path);
 			return NULL;
 		}
 		p = fgets(status, 5, fp);
 		fclose(fp);
-		if (!p || strcmp(status, "up\n") != 0)
+		if (!p || strcmp(status, "up\n") != 0) {
 			return NULL;
+		}
 
 		if (!(fp = fopen("/proc/net/wireless", "r"))) {
 			warn("fopen '/proc/net/wireless':");
 			return NULL;
 		}
 
-		for (i = 0; i < 3; i++)
+		for (i = 0; i < 3; i++) {
 			if (!(p = fgets(buf, sizeof(buf) - 1, fp)))
 				break;
-
+		}
 		fclose(fp);
-		if (i < 2 || !p)
+		if (i < 2 || !p) {
 			return NULL;
+		}
 
-		if (!(datastart = strstr(buf, interface)))
+		if (!(datastart = strstr(buf, interface))) {
 			return NULL;
+		}
 
 		datastart = (datastart+(strlen(interface)+1));
 		sscanf(datastart + 1, " %*d   %d  %*d  %*d\t\t  %*d\t   "
@@ -75,8 +77,9 @@
 		memset(&wreq, 0, sizeof(struct iwreq));
 		wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 		if (esnprintf(wreq.ifr_name, sizeof(wreq.ifr_name), "%s",
-		              interface) < 0)
+		              interface) < 0) {
 			return NULL;
+		}
 
 		if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
 			warn("socket 'AF_INET':");
@@ -91,8 +94,9 @@
 
 		close(sockfd);
 
-		if (!strcmp(id, ""))
+		if (!strcmp(id, "")) {
 			return NULL;
+		}
 
 		return id;
 	}
@@ -148,11 +152,11 @@
 		int q;
 
 		if (load_ieee80211_nodereq(interface, &nr)) {
-			if (nr.nr_max_rssi)
+			if (nr.nr_max_rssi) {
 				q = IEEE80211_NODEREQ_RSSI(&nr);
-			else
+			} else {
 				q = RSSI_TO_PERC(nr.nr_rssi);
-
+			}
 			return bprintf("%d", q);
 		}
 
@@ -164,8 +168,9 @@
 	{
 		struct ieee80211_nodereq nr;
 
-		if (load_ieee80211_nodereq(interface, &nr))
+		if (load_ieee80211_nodereq(interface, &nr)) {
 			return bprintf("%s", nr.nr_nwid);
+		}
 
 		return NULL;
 	}

config.def.h

@@ -14,17 +14,16 @@ static const char unknown_str[] = "n/a";
  *
  * battery_perc        battery percentage              battery name (BAT0)
  *                                                     NULL on OpenBSD/FreeBSD
- * battery_remaining   battery remaining HH:MM         battery name (BAT0)
- *                                                     NULL on OpenBSD/FreeBSD
  * battery_state       battery charging state          battery name (BAT0)
  *                                                     NULL on OpenBSD/FreeBSD
- * cat                 read arbitrary file             path
- * cpu_freq            cpu frequency in MHz            NULL
+ * battery_remaining   battery remaining HH:MM         battery name (BAT0)
+ *                                                     NULL on OpenBSD/FreeBSD
  * cpu_perc            cpu usage in percent            NULL
+ * cpu_freq            cpu frequency in MHz            NULL
  * datetime            date and time                   format string (%F %T)
  * disk_free           free disk space in GB           mountpoint path (/)
  * disk_perc           disk usage in percent           mountpoint path (/)
- * disk_total          total disk space in GB          mountpoint path (/)
+ * disk_total          total disk space in GB          mountpoint path (/")
  * disk_used           used disk space in GB           mountpoint path (/)
  * entropy             available entropy               NULL
  * gid                 GID of current user             NULL
@@ -46,6 +45,7 @@ static const char unknown_str[] = "n/a";
  * ram_total           total memory size in GB         NULL
  * ram_used            used memory in GB               NULL
  * run_command         custom shell command            command (echo foo)
+ * separator           string to echo                  NULL
  * swap_free           free swap in GB                 NULL
  * swap_perc           swap usage in percent           NULL
  * swap_total          total swap size in GB           NULL
@@ -59,9 +59,9 @@ static const char unknown_str[] = "n/a";
  * uptime              system uptime                   NULL
  * username            username of current user        NULL
  * vol_perc            OSS/ALSA volume in percent      mixer file (/dev/mixer)
- *                                                     NULL on OpenBSD/FreeBSD
- * wifi_essid          WiFi ESSID                      interface name (wlan0)
+ *                                                     NULL on OpenBSD
  * wifi_perc           WiFi signal in percent          interface name (wlan0)
+ * wifi_essid          WiFi ESSID                      interface name (wlan0)
  */
 static const struct arg args[] = {
 	/* function format          argument */

config.h

@@ -14,17 +14,16 @@ static const char unknown_str[] = "n/a";
  *
  * battery_perc        battery percentage              battery name (BAT0)
  *                                                     NULL on OpenBSD/FreeBSD
- * battery_remaining   battery remaining HH:MM         battery name (BAT0)
- *                                                     NULL on OpenBSD/FreeBSD
  * battery_state       battery charging state          battery name (BAT0)
  *                                                     NULL on OpenBSD/FreeBSD
- * cat                 read arbitrary file             path
- * cpu_freq            cpu frequency in MHz            NULL
+ * battery_remaining   battery remaining HH:MM         battery name (BAT0)
+ *                                                     NULL on OpenBSD/FreeBSD
  * cpu_perc            cpu usage in percent            NULL
+ * cpu_freq            cpu frequency in MHz            NULL
  * datetime            date and time                   format string (%F %T)
  * disk_free           free disk space in GB           mountpoint path (/)
  * disk_perc           disk usage in percent           mountpoint path (/)
- * disk_total          total disk space in GB          mountpoint path (/)
+ * disk_total          total disk space in GB          mountpoint path (/")
  * disk_used           used disk space in GB           mountpoint path (/)
  * entropy             available entropy               NULL
  * gid                 GID of current user             NULL
@@ -46,6 +45,7 @@ static const char unknown_str[] = "n/a";
  * ram_total           total memory size in GB         NULL
  * ram_used            used memory in GB               NULL
  * run_command         custom shell command            command (echo foo)
+ * separator           string to echo                  NULL
  * swap_free           free swap in GB                 NULL
  * swap_perc           swap usage in percent           NULL
  * swap_total          total swap size in GB           NULL
@@ -59,16 +59,14 @@ static const char unknown_str[] = "n/a";
  * uptime              system uptime                   NULL
  * username            username of current user        NULL
  * vol_perc            OSS/ALSA volume in percent      mixer file (/dev/mixer)
- *                                                     NULL on OpenBSD/FreeBSD
- * wifi_essid          WiFi ESSID                      interface name (wlan0)
+ *                                                     NULL on OpenBSD
  * wifi_perc           WiFi signal in percent          interface name (wlan0)
+ * wifi_essid          WiFi ESSID                      interface name (wlan0)
  */
 static const struct arg args[] = {
 	/* function format          argument */
 	{ cpu_perc, " CPU: %s% | ",  NULL    },
-	{ ram_perc,    "RAM: %s%, ",   NULL    },
-	{ ram_used,    "%s | ",        NULL    },
-	{ netspeed_rx, "NET r:%s, ",   "eno2"  },
-	{ netspeed_tx, "t:%s | ",      "eno2"  },
+	{ ram_perc, "RAM: %s% | ",   NULL    },
+	{ battery_perc, "BAT: %s% | ", "BAT0" },
 	{ datetime, "%s ",          "%F %T" },
 };

config.mk

@@ -1,5 +1,5 @@
 # slstatus version
-VERSION = 1.0
+VERSION = 0
 
 # customize below to fit your system
 
@@ -11,11 +11,11 @@ X11INC = /usr/X11R6/include
 X11LIB = /usr/X11R6/lib
 
 # flags
-CPPFLAGS = -I$(X11INC) -D_DEFAULT_SOURCE -DVERSION=\"${VERSION}\"
-CFLAGS   = -std=c99 -pedantic -Wall -Wextra -Wno-unused-parameter -Os
+CPPFLAGS = -I$(X11INC) -D_DEFAULT_SOURCE
+CFLAGS   = -std=c99 -pedantic -Wall -Wextra -Os
 LDFLAGS  = -L$(X11LIB) -s
 # OpenBSD: add -lsndio
-# FreeBSD: add -lkvm -lsndio
+# FreeBSD: add -lkvm
 LDLIBS   = -lX11
 
 # compiler and linker

slstatus.1

@@ -1,29 +1,22 @@
-.Dd 2023-04-23
+.Dd 2020-06-23
 .Dt SLSTATUS 1
 .Os
 .Sh NAME
 .Nm slstatus
-.Nd suckless status
+.Nd suckless status monitor
 .Sh SYNOPSIS
 .Nm
 .Op Fl s
 .Op Fl 1
 .Sh DESCRIPTION
 .Nm
-is a small tool for providing system status information to other programs
-over the EWMH
-.Em WM_NAME
-property of the root window (used by
-.Xr dwm 1 ) or standard input/output. It is designed to be as efficient as possible by
-only issuing the minimum of system calls required.
-.P
+is a suckless status monitor for window managers that use WM_NAME (e.g. dwm) or
+stdin to fill the status bar.
 By default,
 .Nm
 outputs to WM_NAME.
 .Sh OPTIONS
 .Bl -tag -width Ds
-.It Fl v
-Print version information to stderr, then exit.
 .It Fl s
 Write to stdout instead of WM_NAME.
 .It Fl 1
@@ -33,15 +26,3 @@ Write once to stdout and quit.
 .Nm
 can be customized by creating a custom config.h and (re)compiling the source
 code. This keeps it fast, secure and simple.
-.Sh SIGNALS
-.Nm
-responds to the following signals:
-.Pp
-.Bl -tag -width TERM -compact
-.It USR1
-Triggers an instant redraw.
-.El
-.Sh AUTHORS
-See the LICENSE file for the authors.
-.Sh SEE ALSO
-.Xr dwm 1

slstatus.c

@@ -12,7 +12,7 @@
 #include "util.h"
 
 struct arg {
-	const char *(*func)(const char *);
+	const char *(*func)();
 	const char *fmt;
 	const char *args;
 };
@@ -41,7 +41,7 @@ difftimespec(struct timespec *res, struct timespec *a, struct timespec *b)
 static void
 usage(void)
 {
-	die("usage: %s [-v] [-s] [-1]", argv0);
+	die("usage: %s [-s] [-1]", argv0);
 }
 
 int
@@ -56,11 +56,9 @@ main(int argc, char *argv[])
 
 	sflag = 0;
 	ARGBEGIN {
-	case 'v':
-		die("slstatus-"VERSION);
 		case '1':
 			done = 1;
-		/* FALLTHROUGH */
+			/* fallthrough */
 		case 's':
 			sflag = 1;
 			break;
@@ -68,8 +66,9 @@ main(int argc, char *argv[])
 			usage();
 	} ARGEND
 
-	if (argc)
+	if (argc) {
 		usage();
+	}
 
 	memset(&act, 0, sizeof(act));
 	act.sa_handler = terminate;
@@ -78,22 +77,24 @@ main(int argc, char *argv[])
 	act.sa_flags |= SA_RESTART;
 	sigaction(SIGUSR1, &act, NULL);
 
-	if (!sflag && !(dpy = XOpenDisplay(NULL)))
+	if (!sflag && !(dpy = XOpenDisplay(NULL))) {
 		die("XOpenDisplay: Failed to open display");
+	}
 
 	do {
-		if (clock_gettime(CLOCK_MONOTONIC, &start) < 0)
+		if (clock_gettime(CLOCK_MONOTONIC, &start) < 0) {
 			die("clock_gettime:");
+		}
 
 		status[0] = '\0';
 		for (i = len = 0; i < LEN(args); i++) {
-			if (!(res = args[i].func(args[i].args)))
+			if (!(res = args[i].func(args[i].args))) {
 				res = unknown_str;
-
+			}
 			if ((ret = esnprintf(status + len, sizeof(status) - len,
-			                     args[i].fmt, res)) < 0)
+			                    args[i].fmt, res)) < 0) {
 				break;
-
+			}
 			len += ret;
 		}
 
@@ -103,32 +104,38 @@ main(int argc, char *argv[])
 			if (ferror(stdout))
 				die("puts:");
 		} else {
-			if (XStoreName(dpy, DefaultRootWindow(dpy), status) < 0)
+			if (XStoreName(dpy, DefaultRootWindow(dpy), status)
+                            < 0) {
 				die("XStoreName: Allocation failed");
+			}
 			XFlush(dpy);
 		}
 
 		if (!done) {
-			if (clock_gettime(CLOCK_MONOTONIC, &current) < 0)
+			if (clock_gettime(CLOCK_MONOTONIC, &current) < 0) {
 				die("clock_gettime:");
+			}
 			difftimespec(&diff, &current, &start);
 
 			intspec.tv_sec = interval / 1000;
 			intspec.tv_nsec = (interval % 1000) * 1E6;
 			difftimespec(&wait, &intspec, &diff);
 
-			if (wait.tv_sec >= 0 &&
-			    nanosleep(&wait, NULL) < 0 &&
-			    errno != EINTR)
+			if (wait.tv_sec >= 0) {
+				if (nanosleep(&wait, NULL) < 0 &&
+				    errno != EINTR) {
 					die("nanosleep:");
 				}
+			}
+		}
 	} while (!done);
 
 	if (!sflag) {
 		XStoreName(dpy, DefaultRootWindow(dpy), NULL);
-		if (XCloseDisplay(dpy) < 0)
+		if (XCloseDisplay(dpy) < 0) {
 			die("XCloseDisplay: Failed to close display");
 		}
+	}
 
 	return 0;
 }

slstatus.h

@@ -2,15 +2,12 @@
 
 /* battery */
 const char *battery_perc(const char *);
-const char *battery_remaining(const char *);
 const char *battery_state(const char *);
-
-/* cat */
-const char *cat(const char *path);
+const char *battery_remaining(const char *);
 
 /* cpu */
-const char *cpu_freq(const char *unused);
-const char *cpu_perc(const char *unused);
+const char *cpu_freq(void);
+const char *cpu_perc(void);
 
 /* datetime */
 const char *datetime(const char *fmt);
@@ -22,26 +19,26 @@ const char *disk_total(const char *path);
 const char *disk_used(const char *path);
 
 /* entropy */
-const char *entropy(const char *unused);
+const char *entropy(void);
 
 /* hostname */
-const char *hostname(const char *unused);
+const char *hostname(void);
 
 /* ip */
 const char *ipv4(const char *interface);
 const char *ipv6(const char *interface);
 
 /* kernel_release */
-const char *kernel_release(const char *unused);
+const char *kernel_release(void);
 
 /* keyboard_indicators */
-const char *keyboard_indicators(const char *fmt);
+const char *keyboard_indicators(void);
 
 /* keymap */
-const char *keymap(const char *unused);
+const char *keymap(void);
 
 /* load_avg */
-const char *load_avg(const char *unused);
+const char *load_avg(void);
 
 /* netspeeds */
 const char *netspeed_rx(const char *interface);
@@ -51,34 +48,37 @@ const char *netspeed_tx(const char *interface);
 const char *num_files(const char *path);
 
 /* ram */
-const char *ram_free(const char *unused);
-const char *ram_perc(const char *unused);
-const char *ram_total(const char *unused);
-const char *ram_used(const char *unused);
+const char *ram_free(void);
+const char *ram_perc(void);
+const char *ram_total(void);
+const char *ram_used(void);
 
 /* run_command */
 const char *run_command(const char *cmd);
 
+/* separator */
+const char *separator(const char *separator);
+
 /* swap */
-const char *swap_free(const char *unused);
-const char *swap_perc(const char *unused);
-const char *swap_total(const char *unused);
-const char *swap_used(const char *unused);
+const char *swap_free(void);
+const char *swap_perc(void);
+const char *swap_total(void);
+const char *swap_used(void);
 
 /* temperature */
 const char *temp(const char *);
 
 /* uptime */
-const char *uptime(const char *unused);
+const char *uptime(void);
 
 /* user */
-const char *gid(const char *unused);
-const char *uid(const char *unused);
-const char *username(const char *unused);
+const char *gid(void);
+const char *username(void);
+const char *uid(void);
 
 /* volume */
 const char *vol_perc(const char *card);
 
 /* wifi */
-const char *wifi_essid(const char *interface);
 const char *wifi_perc(const char *interface);
+const char *wifi_essid(const char *interface);

util.c

@@ -13,6 +13,10 @@ char *argv0;
 static void
 verr(const char *fmt, va_list ap)
 {
+	if (argv0 && strncmp(fmt, "usage", sizeof("usage") - 1)) {
+		fprintf(stderr, "%s: ", argv0);
+	}
+
 	vfprintf(stderr, fmt, ap);
 
 	if (fmt[0] && fmt[strlen(fmt) - 1] == ':') {
@@ -115,8 +119,9 @@ fmt_human(uintmax_t num, int base)
 	}
 
 	scaled = num;
-	for (i = 0; i < prefixlen && scaled >= base; i++)
+	for (i = 0; i < prefixlen && scaled >= base; i++) {
 		scaled /= base;
+	}
 
 	return bprintf("%.1f %s", scaled, prefix[i]);
 }

util.h

@@ -3,7 +3,7 @@
 
 extern char buf[1024];
 
-#define LEN(x) (sizeof(x) / sizeof((x)[0]))
+#define LEN(x) (sizeof (x) / sizeof *(x))
 
 extern char *argv0;