added -c option

-c is used to override the default config files and instead use the speocified
one

hkd.1

@@ -6,6 +6,7 @@ hkd \- simple HotKey Daemon
 .SH SYNOPSIS
 .SY hkd
 .OP \-v
+.OP \-c file
 .YS
 
 .SH DESCRIPTION
@@ -22,6 +23,10 @@ correctly.
 .IP \-v
 verbose, prints the internal pressed key buffer upon change acting as a crude
 keylogger :^)
+.IP "\-c file"
+override default configuration file location, instead using the specified
+.I file
+as the temporary config file
 
 .SH FILES
 The configuration files are searched in the following order:
@@ -86,6 +91,8 @@ Known bugs are:
 .IP -
 Commands in the config file cannot be multiline
 .IP -
+Invalid config files are not detected properly, or at least not explicitly
+.IP -
 Child processes
 are waited at program exit possibly causing the process tree to hang as there is
 no real child process control

hkd.c

@@ -206,9 +206,12 @@ struct hotkey_list_e {
 };
 
 struct hotkey_list_e *hotkey_list = NULL;
-int dead = 0; // exit flag
 const char evdev_root_dir[] = "/dev/input/";
 unsigned long hotkey_size_mask = 0;
+char *ext_config_file = NULL;
+/* Flags */
+int vflag = 0;
+int dead = 0; // exit flag
 
 /* key buffer operations */
 int key_buffer_add (struct key_buffer*, unsigned short);
@@ -237,15 +240,17 @@ int main (int argc, char *argv[])
 	action.sa_handler = int_handler;
 	sigaction(SIGINT, &action, NULL);
 
-	/* Verbose flag */
-	int vflag = 0;
-
 	/* Parse command line arguments */
 	int opc;
-	while ((opc = getopt(argc, argv, "v")) != -1) {
+	while ((opc = getopt(argc, argv, "vc:")) != -1) {
 		switch (opc) {
 		case 'v':
 			vflag = 1;
+		case 'c':
+			ext_config_file = malloc(strlen(optarg) + 1);
+			if (!ext_config_file)
+				die("malloc in main()");
+			 strcpy(ext_config_file, optarg);
 		break;		
 		}
 	}
@@ -588,9 +593,29 @@ void hotkey_list_add (struct hotkey_list_e *head, struct key_buffer *kb, char *c
 
 void parse_config_file (void)
 {
-	
 	wordexp_t result = {0};	
 	FILE *fd;
+	if (ext_config_file) {
+		switch (wordexp(ext_config_file, &result, 0)) {
+		case 0:
+			break;
+		case WRDE_NOSPACE:
+			/* If the error was WRDE_NOSPACE,
+		 	* then perhaps part of the result was allocated */
+			wordfree (&result);
+			die("not enough space")
+		default: 
+			/* Some other error */
+			die("path not valid");
+		}
+	
+		fd = fopen(result.we_wordv[0], "r");
+		wordfree(&result);
+		if (!fd)
+			die("error opening config file");
+		free(ext_config_file);
+		ext_config_file = NULL;
+	} else {
 		for (int i = 0; i < array_size_const(config_paths); i++) {
 			switch (wordexp(config_paths[i], &result, 0)) {
 			case 0:
@@ -613,6 +638,7 @@ void parse_config_file (void)
 		}
 		if (!fd)
 			die("could not open any config files, check the log for more details");
+	}
 
 	struct key_buffer kb;
 	for (int linenum = 1;; linenum++) {