added daemonization support

1 files changed, 75 insertions, 27 deletions

diff --git a/slstatus.c b/slstatus.c
index ab461c8..5c83a84 100644
--- a/slstatus.c
+++ b/slstatus.c
@@ -24,8 +24,15 @@
 #undef strlcat
 #undef strlcpy
 
+#include "arg.h"
 #include "strlcat.h"
 #include "strlcpy.h"
+#include "concat.h"
+
+char *argv0;
+char concat[];
+
+FILE *foutput;
 
 struct arg {
 	char *(*func)();
@@ -107,7 +114,7 @@ battery_perc(const char *battery)
 
 	fp = fopen(batterynowfile, "r");
 	if (fp == NULL ) {
-		fprintf(stderr, "Error opening battery file: %s: %s\n",
+		fprintf(foutput, "Error opening battery file: %s: %s\n",
 						batterynowfile,
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
@@ -118,7 +125,7 @@ battery_perc(const char *battery)
 
 	fp = fopen(batteryfullfile, "r");
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening battery file: %s\n",
+		fprintf(foutput, "Error opening battery file: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -139,7 +146,7 @@ cpu_perc(void)
 	FILE *fp = fopen("/proc/stat","r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening stat file: %s\n",
+		fprintf(foutput, "Error opening stat file: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -151,7 +158,7 @@ cpu_perc(void)
 
 	fp = fopen("/proc/stat","r");
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening stat file: %s\n",
+		fprintf(foutput, "Error opening stat file: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -181,7 +188,7 @@ disk_free(const char *mountpoint)
 	struct statvfs fs;
 
 	if (statvfs(mountpoint, &fs) < 0) {
-		fprintf(stderr, "Could not get filesystem info: %s\n",
+		fprintf(foutput, "Could not get filesystem info: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -195,7 +202,7 @@ disk_perc(const char *mountpoint)
 	struct statvfs fs;
 
 	if (statvfs(mountpoint, &fs) < 0) {
-		fprintf(stderr, "Could not get filesystem info: %s\n",
+		fprintf(foutput, "Could not get filesystem info: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -210,7 +217,7 @@ disk_total(const char *mountpoint)
 	struct statvfs fs;
 
 	if (statvfs(mountpoint, &fs) < 0) {
-		fprintf(stderr, "Could not get filesystem info: %s\n",
+		fprintf(foutput, "Could not get filesystem info: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -224,7 +231,7 @@ disk_used(const char *mountpoint)
 	struct statvfs fs;
 
 	if (statvfs(mountpoint, &fs) < 0) {
-		fprintf(stderr, "Could not get filesystem info: %s\n",
+		fprintf(foutput, "Could not get filesystem info: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -239,7 +246,7 @@ entropy(void)
 	FILE *fp = fopen("/proc/sys/kernel/random/entropy_avail", "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Could not open entropy file: %s\n",
+		fprintf(foutput, "Could not open entropy file: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -262,7 +269,7 @@ hostname(void)
 	FILE *fp = fopen("/proc/sys/kernel/hostname", "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Could not open hostname file: %s\n",
+		fprintf(foutput, "Could not open hostname file: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -283,7 +290,7 @@ ip(const char *interface)
 	char host[NI_MAXHOST];
 
 	if (getifaddrs(&ifaddr) == -1) {
-		fprintf(stderr, "Error getting IP address: %s\n",
+		fprintf(foutput, "Error getting IP address: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -298,7 +305,7 @@ 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");
+				fprintf(foutput, "Error getting IP address.\n");
 				return smprintf(UNKNOWN_STR);
 			}
 			return smprintf("%s", host);
@@ -317,7 +324,7 @@ load_avg(void)
 	double avgs[3];
 
 	if (getloadavg(avgs, 3) < 0) {
-		fprintf(stderr, "Error getting load avg.\n");
+		fprintf(foutput, "Error getting load avg.\n");
 		return smprintf(UNKNOWN_STR);
 	}
 
@@ -331,7 +338,7 @@ ram_free(void)
 	FILE *fp = fopen("/proc/meminfo", "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening meminfo file: %s\n",
+		fprintf(foutput, "Error opening meminfo file: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -349,7 +356,7 @@ ram_perc(void)
 	FILE *fp = fopen("/proc/meminfo", "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening meminfo file: %s\n",
+		fprintf(foutput, "Error opening meminfo file: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -371,7 +378,7 @@ ram_total(void)
 	FILE *fp = fopen("/proc/meminfo", "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening meminfo file: %s\n",
+		fprintf(foutput, "Error opening meminfo file: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -388,7 +395,7 @@ ram_used(void)
 	FILE *fp = fopen("/proc/meminfo", "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening meminfo file: %s\n",
+		fprintf(foutput, "Error opening meminfo file: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -411,7 +418,7 @@ run_command(const char* command)
 	char buffer[64];
 
 	if (fp == NULL) {
-		fprintf(stderr, "Could not get command output for: %s: %s\n",
+		fprintf(foutput, "Could not get command output for: %s: %s\n",
 						command, strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -436,7 +443,7 @@ temp(const char *file)
 	FILE *fp = fopen(file, "r");
 
 	if (fp == NULL) {
-		fprintf(stderr, "Could not open temperature file: %s\n",
+		fprintf(foutput, "Could not open temperature file: %s\n",
 							strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -469,7 +476,7 @@ username(void)
 	if (pw == NULL)
 		return smprintf("%s", pw->pw_name);
 
-	fprintf(stderr, "Could not get username: %s\n",
+	fprintf(foutput, "Could not get username: %s\n",
 					strerror(errno));
 	return smprintf(UNKNOWN_STR);
 }
@@ -502,7 +509,7 @@ vol_perc(const char *soundcard)
 	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");
+		fprintf(foutput, "Could not get alsa volume.\n");
 		return smprintf(UNKNOWN_STR);
 	}
 	snd_mixer_selem_id_set_name(vol_info, ALSA_CHANNEL);
@@ -545,7 +552,7 @@ wifi_perc(const char *wificard)
 	fp = fopen(path, "r");
 
 	if(fp == NULL) {
-		fprintf(stderr, "Error opening wifi operstate file: %s\n",
+		fprintf(foutput, "Error opening wifi operstate file: %s\n",
 							strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -557,7 +564,7 @@ wifi_perc(const char *wificard)
 
 	fp = fopen("/proc/net/wireless", "r");
 	if (fp == NULL) {
-		fprintf(stderr, "Error opening wireless file: %s\n",
+		fprintf(foutput, "Error opening wireless file: %s\n",
 						strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -589,13 +596,13 @@ wifi_essid(const char *wificard)
 	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",
+		fprintf(foutput, "Cannot open socket for interface: %s: %s\n",
 						wificard, strerror(errno));
 		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",
+		fprintf(foutput, "Get ESSID ioctl failed for interface %s: %s\n",
 						wificard, strerror(errno));
 		return smprintf(UNKNOWN_STR);
 	}
@@ -606,16 +613,57 @@ wifi_essid(const char *wificard)
 		return smprintf("%s", (char *)wreq.u.essid.pointer);
 }
 
+void
+usage(void)
+{
+	fprintf(stderr, "usage: %s [-d] [-l path]\n", argv0);
+	exit(0);
+}
+
 int
-main(void)
+main(int argc, char *argv[])
 {
+	unsigned short int dflag, lflag;
 	size_t i;
-	char status_string[4096];
+	char status_string[4096], logpath[4096];
 	char *res, *element;
 	struct arg argument;
 
+	foutput = stderr;
 	dpy = XOpenDisplay(0x0);
 
+	ARGBEGIN {
+		case 'd':
+			dflag = 1;
+			break;
+		case 'l':
+			strlcpy(logpath, EARGF(usage()), sizeof(logpath)-1);
+			logpath[strlen(logpath)+1] = '\0';
+			foutput = fopen(logpath, "a");
+			if (foutput == NULL) {
+				fprintf(stderr, "failed to open log file at %s: %s\n",
+							logpath, strerror(errno));
+				return (1);
+			}
+			lflag = 1;
+			break;
+		default:
+			usage();
+	} ARGEND
+
+	if (dflag && !lflag) {
+		ccat(2, getenv("HOME"), "/.slstatus_log");
+		foutput = fopen(concat, "a");
+		if (foutput == NULL) {
+			fprintf(stderr, "failed to open log file at %s: %s\n",
+						logpath, strerror(errno));
+			return (1);
+		}
+	}
+
+	if (dflag)
+		daemon(0, 0);
+
 	for (;;) {
 		memset(status_string, 0, sizeof(status_string));
 		for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {