X-Git-Url: https://git.xinqibao.xyz/slstatus.git/blobdiff_plain/5e4dc85bb9bf821d87bcf8a13e0f0843fd68bfe1..3e04f1d910b2bab606e2bcaa61a0cee4f9cfe8b8:/slstatus.c

diff --git a/slstatus.c b/slstatus.c
index f070e1d..69fb6a5 100644
--- a/slstatus.c
+++ b/slstatus.c
@@ -1,14 +1,14 @@
 /* See LICENSE file for copyright and license details. */
 
 #include <alsa/asoundlib.h>
-#include <arpa/inet.h>
+#include <err.h>
 #include <fcntl.h>
 #include <ifaddrs.h>
 #include <limits.h>
 #include <linux/wireless.h>
-#include <locale.h>
 #include <netdb.h>
 #include <pwd.h>
+#include <signal.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -28,17 +28,19 @@
 
 #include "strlcat.h"
 #include "strlcpy.h"
+#include "concat.h"
+
+char concat[];
 
-typedef char *(*op_fun)();
 struct arg {
-	op_fun func;
+	char *(*func)();
 	const char *format;
 	const char *args;
 };
 
-static void setstatus(const char *);
 static char *smprintf(const char *, ...);
 static char *battery_perc(const char *);
+static char *battery_state(const char *);
 static char *cpu_perc(void);
 static char *datetime(const char *);
 static char *disk_free(const char *);
@@ -62,19 +64,13 @@ static char *username(void);
 static char *vol_perc(const char *);
 static char *wifi_perc(const char *);
 static char *wifi_essid(const char *);
+static void sighandler(const int);
 
+static unsigned short int delay, done;
 static Display *dpy;
 
 #include "config.h"
 
-static void
-setstatus(const char *str)
-{
-	/* set WM_NAME via X11 */
-	XStoreName(dpy, DefaultRootWindow(dpy), str);
-	XSync(dpy, False);
-}
-
 static char *
 smprintf(const char *fmt, ...)
 {
@@ -102,45 +98,50 @@ smprintf(const char *fmt, ...)
 static char *
 battery_perc(const char *battery)
 {
-	int now, full, perc;
-	char batterynowfile[64];
-	char batteryfullfile[64];
+	int perc;
 	FILE *fp;
 
-	strlcpy(batterynowfile, BATTERY_PATH, sizeof(batterynowfile));
-	strlcat(batterynowfile, battery, sizeof(batterynowfile));
-	strlcat(batterynowfile, "/", sizeof(batterynowfile));
-	strlcat(batterynowfile, BATTERY_NOW, sizeof(batterynowfile));
-
-	strlcpy(batteryfullfile, BATTERY_PATH, sizeof(batteryfullfile));
-	strlcat(batteryfullfile, battery, sizeof(batteryfullfile));
-	strlcat(batteryfullfile, "/", sizeof(batteryfullfile));
-	strlcat(batteryfullfile, BATTERY_FULL, sizeof(batteryfullfile));
-
-	fp = fopen(batterynowfile, "r");
-	if (fp == NULL ) {
-		fprintf(stderr, "Error opening battery file: %s: %s\n",
-						batterynowfile,
-						strerror(errno));
+	ccat(3, "/sys/class/power_supply/", battery, "/capacity");
+	fp = fopen(concat, "r");
+	if (fp == NULL) {
+		warn("Error opening battery file: %s", concat);
 		return smprintf(UNKNOWN_STR);
 	}
-
-	fscanf(fp, "%i", &now);
+	fscanf(fp, "%i", &perc);
 	fclose(fp);
 
-	fp = fopen(batteryfullfile, "r");
-	if (fp == NULL) {
-		fprintf(stderr, "Error opening battery file: %s\n",
-						strerror(errno));
+	return smprintf("%d%%", perc);
+}
+
+static char *
+battery_state(const char *battery)
+{
+	char *state[12]; 
+	FILE *fp;
+
+	if (!state) {
+		warn("Failed to get battery state.");
 		return smprintf(UNKNOWN_STR);
 	}
 
-	fscanf(fp, "%i", &full);
-	fclose(fp);
 
-	perc = now / (full / 100);
+	ccat(3, "/sys/class/power_supply/", battery, "/status");
+	fp = fopen(concat, "r");
+	if (fp == NULL) {
+		warn("Error opening battery file: %s", concat);
+		return smprintf(UNKNOWN_STR);
+	}
+	fscanf(fp, "%12s", state);
+	fclose(fp);
 
-	return smprintf("%d%%", perc);
+	if (strcmp(state, "Charging") == 0)
+		return smprintf("+");
+	else if (strcmp(state, "Discharging") == 0)
+		return smprintf("-");
+	else if (strcmp(state, "Full") == 0)
+		return smprintf("=");
+	else
+		return smprintf("?");
 }
 
 static char *
@@ -151,27 +152,26 @@ cpu_perc(void)
 	FILE *fp = fopen("/proc/stat","r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening stat file: %s\n",
-						strerror(errno));
+		warn("Error opening stat file");
 		return smprintf(UNKNOWN_STR);
 	}
 
 	fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
 	fclose(fp);
 
-	/* wait a second (for avg values) */
-	sleep(1);
+	delay = (UPDATE_INTERVAL - (UPDATE_INTERVAL - 1));
+	sleep(delay);
 
 	fp = fopen("/proc/stat","r");
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening stat file: %s\n",
-						strerror(errno));
+		warn("Error opening stat file");
 		return smprintf(UNKNOWN_STR);
 	}
 
 	fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
 	fclose(fp);
 	perc = 100 * ((b[0]+b[1]+b[2]) - (a[0]+a[1]+a[2])) / ((b[0]+b[1]+b[2]+b[3]) - (a[0]+a[1]+a[2]+a[3]));
+
 	return smprintf("%d%%", perc);
 }
 
@@ -194,10 +194,10 @@ disk_free(const char *mountpoint)
 	struct statvfs fs;
 
 	if (statvfs(mountpoint, &fs) < 0) {
-		fprintf(stderr, "Could not get filesystem info: %s\n",
-						strerror(errno));
+		warn("Could not get filesystem info");
 		return smprintf(UNKNOWN_STR);
 	}
+
 	return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
 }
 
@@ -208,12 +208,12 @@ disk_perc(const char *mountpoint)
 	struct statvfs fs;
 
 	if (statvfs(mountpoint, &fs) < 0) {
-		fprintf(stderr, "Could not get filesystem info: %s\n",
-						strerror(errno));
+		warn("Could not get filesystem info");
 		return smprintf(UNKNOWN_STR);
 	}
 
 	perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
+
 	return smprintf("%d%%", perc);
 }
 
@@ -223,8 +223,7 @@ disk_total(const char *mountpoint)
 	struct statvfs fs;
 
 	if (statvfs(mountpoint, &fs) < 0) {
-		fprintf(stderr, "Could not get filesystem info: %s\n",
-						strerror(errno));
+		warn("Could not get filesystem info");
 		return smprintf(UNKNOWN_STR);
 	}
 
@@ -237,8 +236,7 @@ disk_used(const char *mountpoint)
 	struct statvfs fs;
 
 	if (statvfs(mountpoint, &fs) < 0) {
-		fprintf(stderr, "Could not get filesystem info: %s\n",
-						strerror(errno));
+		warn("Could not get filesystem info");
 		return smprintf(UNKNOWN_STR);
 	}
 
@@ -252,21 +250,20 @@ entropy(void)
 	FILE *fp = fopen("/proc/sys/kernel/random/entropy_avail", "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Could not open entropy file: %s\n",
-						strerror(errno));
+		warn("Could not open entropy file");
 		return smprintf(UNKNOWN_STR);
 	}
 
 	fscanf(fp, "%d", &entropy);
 	fclose(fp);
+
 	return smprintf("%d", entropy);
 }
 
 static char *
 gid(void)
 {
-	gid_t gid = getgid();
-	return smprintf("%d", gid);
+	return smprintf("%d", getgid());
 }
 
 static char *
@@ -276,16 +273,16 @@ hostname(void)
 	FILE *fp = fopen("/proc/sys/kernel/hostname", "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Could not open hostname file: %s\n",
-						strerror(errno));
+		warn("Could not open hostname file");
 		return smprintf(UNKNOWN_STR);
 	}
 
 	fgets(hostname, sizeof(hostname), fp);
 	/* FIXME: needs improvement */
-	memset(&hostname[strlen(hostname)-1], '\0',
+	memset(&hostname[strlen(hostname)], '\0',
 		sizeof(hostname) - strlen(hostname));
 	fclose(fp);
+
 	return smprintf("%s", hostname);
 }
 
@@ -297,12 +294,10 @@ ip(const char *interface)
 	char host[NI_MAXHOST];
 
 	if (getifaddrs(&ifaddr) == -1) {
-		fprintf(stderr, "Error getting IP address: %s\n",
-						strerror(errno));
+		warn("Error getting IP address");
 		return smprintf(UNKNOWN_STR);
 	}
 
-	/* get the ip address */
 	for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
 		if (ifa->ifa_addr == NULL)
 			continue;
@@ -312,14 +307,13 @@ ip(const char *interface)
 
 		if ((strcmp(ifa->ifa_name, interface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
 			if (s != 0) {
-				fprintf(stderr, "Error getting IP address.\n");
+				warnx("Error getting IP address.");
 				return smprintf(UNKNOWN_STR);
 			}
 			return smprintf("%s", host);
 		}
 	}
 
-	/* free the address */
 	freeifaddrs(ifaddr);
 
 	return smprintf(UNKNOWN_STR);
@@ -331,7 +325,7 @@ load_avg(void)
 	double avgs[3];
 
 	if (getloadavg(avgs, 3) < 0) {
-		fprintf(stderr, "Error getting load avg.\n");
+		warnx("Error getting load avg.");
 		return smprintf(UNKNOWN_STR);
 	}
 
@@ -345,13 +339,13 @@ ram_free(void)
 	FILE *fp = fopen("/proc/meminfo", "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening meminfo file: %s\n",
-						strerror(errno));
+		warn("Error opening meminfo file");
 		return smprintf(UNKNOWN_STR);
 	}
 
 	fscanf(fp, "MemFree: %ld kB\n", &free);
 	fclose(fp);
+
 	return smprintf("%f", (float)free / 1024 / 1024);
 }
 
@@ -363,8 +357,7 @@ ram_perc(void)
 	FILE *fp = fopen("/proc/meminfo", "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening meminfo file: %s\n",
-						strerror(errno));
+		warn("Error opening meminfo file");
 		return smprintf(UNKNOWN_STR);
 	}
 
@@ -375,6 +368,7 @@ ram_perc(void)
 
 	fclose(fp);
 	perc = 100 * ((total - free) - (buffers + cached)) / total;
+
 	return smprintf("%d%%", perc);
 }
 
@@ -385,13 +379,13 @@ ram_total(void)
 	FILE *fp = fopen("/proc/meminfo", "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening meminfo file: %s\n",
-						strerror(errno));
+		warn("Error opening meminfo file");
 		return smprintf(UNKNOWN_STR);
 	}
 
 	fscanf(fp, "MemTotal: %ld kB\n", &total);
 	fclose(fp);
+
 	return smprintf("%f", (float)total / 1024 / 1024);
 }
 
@@ -402,8 +396,7 @@ ram_used(void)
 	FILE *fp = fopen("/proc/meminfo", "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening meminfo file: %s\n",
-						strerror(errno));
+		warn("Error opening meminfo file");
 		return smprintf(UNKNOWN_STR);
 	}
 
@@ -414,6 +407,7 @@ ram_used(void)
 
 	fclose(fp);
 	used = total - free - buffers - cached;
+
 	return smprintf("%f", (float)used / 1024 / 1024);
 }
 
@@ -422,11 +416,10 @@ run_command(const char* command)
 {
 	int good;
 	FILE *fp = popen(command, "r");
-	char buffer[64];
+	char buffer[64] = "";
 
 	if (fp == NULL) {
-		fprintf(stderr, "Could not get command output for: %s: %s\n",
-						command, strerror(errno));
+		warn("Could not get command output for: %s", command);
 		return smprintf(UNKNOWN_STR);
 	}
 
@@ -440,6 +433,7 @@ run_command(const char* command)
 	}
 	if (good)
 		buffer[strlen(buffer)-1] = '\0';
+
 	return smprintf("%s", buffer);
 }
 
@@ -450,13 +444,13 @@ temp(const char *file)
 	FILE *fp = fopen(file, "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Could not open temperature file: %s\n",
-							strerror(errno));
+		warn("Could not open temperature file");
 		return smprintf(UNKNOWN_STR);
 	}
 
 	fscanf(fp, "%d", &temperature);
 	fclose(fp);
+
 	return smprintf("%d°C", temperature / 1000);
 }
 
@@ -477,82 +471,55 @@ uptime(void)
 static char *
 username(void)
 {
-	register struct passwd *pw;
-	register uid_t uid;
-
-	uid = geteuid();
-	pw = getpwuid(uid);
+	uid_t uid = geteuid();
+	struct passwd *pw = getpwuid(uid);
 
-	if (pw)
-		return smprintf("%s", pw->pw_name);
-	else {
-		fprintf(stderr, "Could not get username: %s\n",
-					strerror(errno));
+	if (pw == NULL) {
+		warn("Could not get username");
 		return smprintf(UNKNOWN_STR);
 	}
 
-	return smprintf(UNKNOWN_STR);
+	return smprintf("%s", pw->pw_name);
 }
 
 static char *
 uid(void)
 {
-	/* FIXME: WHY USE register modifier? */
-	register uid_t uid;
-
-	uid = geteuid();
-
-	if (uid)
-		return smprintf("%d", uid);
-	else {
-		fprintf(stderr, "Could not get uid.\n");
-		return smprintf(UNKNOWN_STR);
-	}
-
-	return smprintf(UNKNOWN_STR);
+	return smprintf("%d", geteuid());
 }
 
 
 static char *
 vol_perc(const char *soundcard)
 {
-	int mute = 0;
-	long vol = 0, max = 0, min = 0;
+	long int vol, max, min;
 	snd_mixer_t *handle;
-	snd_mixer_elem_t *pcm_mixer, *mas_mixer;
-	snd_mixer_selem_id_t *vol_info, *mute_info;
+	snd_mixer_elem_t *elem;
+	snd_mixer_selem_id_t *s_elem;
 
 	snd_mixer_open(&handle, 0);
 	snd_mixer_attach(handle, soundcard);
 	snd_mixer_selem_register(handle, NULL, NULL);
 	snd_mixer_load(handle);
+	snd_mixer_selem_id_malloc(&s_elem);
+	snd_mixer_selem_id_set_name(s_elem, "Master");
+	elem = snd_mixer_find_selem(handle, s_elem);
 
-	snd_mixer_selem_id_malloc(&vol_info);
-	snd_mixer_selem_id_malloc(&mute_info);
-	if (vol_info == NULL || mute_info == NULL) {
-		fprintf(stderr, "Could not get alsa volume.\n");
+	if (elem == NULL) {
+		snd_mixer_selem_id_free(s_elem);
+		snd_mixer_close(handle);
+		warn("Failed to get volume percentage for: %s", soundcard);
 		return smprintf(UNKNOWN_STR);
 	}
-	snd_mixer_selem_id_set_name(vol_info, ALSA_CHANNEL);
-	snd_mixer_selem_id_set_name(mute_info, ALSA_CHANNEL);
-	pcm_mixer = snd_mixer_find_selem(handle, vol_info);
-	mas_mixer = snd_mixer_find_selem(handle, mute_info);
-
-	snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, &min, &max);
-	snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, SND_MIXER_SCHN_MONO, &vol);
-	snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO, &mute);
-
-	if (vol_info)
-		snd_mixer_selem_id_free(vol_info);
-	if (mute_info)
-		snd_mixer_selem_id_free(mute_info);
-	if (handle)
-		snd_mixer_close(handle);
 
-	if (!mute)
-		return smprintf("mute");
-	else
-		return smprintf("%d%%", (vol * 100) / max);
+	snd_mixer_handle_events(handle);
+	snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
+	snd_mixer_selem_get_playback_volume(elem, 0, &vol);
+
+	snd_mixer_selem_id_free(s_elem);
+	snd_mixer_close(handle);
+
+	return smprintf("%d%%", ((uint_fast16_t)(vol * 100) / max));
 }
 
 static char *
@@ -561,18 +528,15 @@ wifi_perc(const char *wificard)
 	int strength;
 	char buf[255];
 	char *datastart;
-	char path[64];
 	char status[5];
-	char needle[strlen(wificard)+2];
-	FILE *fp = fopen(path, "r");
+	FILE *fp;
+
+	ccat(3, "/sys/class/net/", wificard, "/operstate");
 
-	strlcpy(path, "/sys/class/net/", sizeof(path));
-	strlcat(path, wificard, sizeof(path));
-	strlcat(path, "/operstate", sizeof(path));
+	fp = fopen(concat, "r");
 
-	if(fp == NULL) {
-		fprintf(stderr, "Error opening wifi operstate file: %s\n",
-							strerror(errno));
+	if (fp == NULL) {
+		warn("Error opening wifi operstate file");
 		return smprintf(UNKNOWN_STR);
 	}
 
@@ -583,24 +547,23 @@ wifi_perc(const char *wificard)
 
 	fp = fopen("/proc/net/wireless", "r");
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening wireless file: %s\n",
-						strerror(errno));
+		warn("Error opening wireless file");
 		return smprintf(UNKNOWN_STR);
 	}
 
-	strlcpy(needle, wificard, sizeof(needle));
-	strlcat(needle, ":", sizeof(needle));
+	ccat(2, wificard, ":");
 	fgets(buf, sizeof(buf), fp);
 	fgets(buf, sizeof(buf), fp);
 	fgets(buf, sizeof(buf), fp);
 
-	datastart = strstr(buf, needle);
+	datastart = strstr(buf, concat);
 	if (datastart != NULL) {
 		datastart = strstr(buf, ":");
 		sscanf(datastart + 1, " %*d   %d  %*d  %*d		  %*d	   %*d		%*d		 %*d	  %*d		 %*d", &strength);
 	}
 
 	fclose(fp);
+
 	return smprintf("%d%%", strength);
 }
 
@@ -614,40 +577,49 @@ wifi_essid(const char *wificard)
 	memset(&wreq, 0, sizeof(struct iwreq));
 	wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
 	sprintf(wreq.ifr_name, wificard);
-	if(sockfd == -1) {
-		fprintf(stderr, "Cannot open socket for interface: %s: %s\n",
-						wificard, strerror(errno));
+	if (sockfd == -1) {
+		warn("Cannot open socket for interface: %s", wificard);
 		return smprintf(UNKNOWN_STR);
 	}
 	wreq.u.essid.pointer = id;
 	if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
-		fprintf(stderr, "Get ESSID ioctl failed for interface %s: %s\n",
-						wificard, strerror(errno));
+		warn("Get ESSID ioctl failed for interface %s", wificard);
 		return smprintf(UNKNOWN_STR);
 	}
 
+	close(sockfd);
+
 	if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
 		return smprintf(UNKNOWN_STR);
 	else
 		return smprintf("%s", (char *)wreq.u.essid.pointer);
 }
 
+static void
+sighandler(const int signo)
+{
+	if (signo == SIGTERM || signo == SIGINT)
+		done = 1;
+}
+
 int
 main(void)
 {
-	size_t i;
+	unsigned short int i;
 	char status_string[4096];
-	char *res, *element;
+	char *res, *element, *status_old;
 	struct arg argument;
+	struct sigaction act;
 
-	dpy = XOpenDisplay(0x0);
-	if (!dpy) {
-		fprintf(stderr, "Cannot open display!\n");
-		exit(1);
-	}
+	memset(&act, 0, sizeof(act));
+	act.sa_handler = sighandler;
+	sigaction(SIGINT,  &act, 0);
+	sigaction(SIGTERM, &act, 0);
+
+	dpy = XOpenDisplay(NULL);
 
-	for (;;) {
-		memset(status_string, 0, sizeof(status_string));
+	while (!done) {
+		status_string[0] = '\0';
 		for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
 			argument = args[i];
 			if (argument.args == NULL)
@@ -657,17 +629,26 @@ main(void)
 			element = smprintf(argument.format, res);
 			if (element == NULL) {
 				element = smprintf(UNKNOWN_STR);
-				fprintf(stderr, "Failed to format output.\n");
+				warnx("Failed to format output.");
 			}
 			strlcat(status_string, element, sizeof(status_string));
 			free(res);
 			free(element);
 		}
-
-		setstatus(status_string);
-		sleep(UPDATE_INTERVAL -1);
+		XStoreName(dpy, DefaultRootWindow(dpy), status_string);
+		XSync(dpy, False);
+		/*
+		 * subtract delay time spend in function
+		 * calls from the actual global delay time
+		 */
+		sleep(UPDATE_INTERVAL - delay);
+		delay = 0;
 	}
 
+	XStoreName(dpy, DefaultRootWindow(dpy), NULL);
+	XSync(dpy, False);
+
 	XCloseDisplay(dpy);
+
 	return 0;
 }