better string handling

backend.c

@@ -1,5 +1,7 @@
 #include <stdlib.h>
+#include <stdio.h>
 #include <string.h>
+#include "config.h"
 
 #define concat(out, s1, s2, _free) { \
 	concat## _free(out, s1, s2); \
@@ -78,3 +80,29 @@ char* smartstrcasestr(const char *haystack, const char *needle){
 	return ret;
 }
 
+char* parse_cmd_char(const char *cmd, const char *path){
+	char *index = strstr(cmd, SETTINGS_COMMAND_REPLACE_STR);
+	char *out;
+
+	if (index) {
+		out = malloc(strlen(cmd) + 1 + strlen(path) + 1);
+		char *o = out;
+		memcpy(out, cmd, index - cmd);
+		o += index-cmd;
+		*o = '\"';
+		o++;
+		memcpy(o, path, strlen(path));
+		o += strlen(path);
+		*o = '\"';
+		memcpy(o+1, index + 1, strlen(index+1));
+		*(o+strlen(index+1)+1) = '\0';
+		return out;
+	} else {
+		concat(out, cmd, " ./\"", 0);
+		concat(out, out, path, 1);
+		concat(out, out, "\"", 1);
+	}
+
+	return out;
+
+}