Search XDG_CONFIG_HOME for user-specific config

src/common.h

@@ -22,8 +22,6 @@
 #ifndef _COMMON_H
 #define _COMMON_H
 
-#define DEFAULT_CONF_PATH "/etc/shadowsocks-libev/config.json"
-
 #ifndef SOL_TCP
 #define SOL_TCP IPPROTO_TCP
 #endif

src/local.c

@@ -1424,7 +1424,7 @@ main(int argc, char **argv)
 
     if (argc == 1) {
         if (conf_path == NULL) {
-            conf_path = DEFAULT_CONF_PATH;
+            conf_path = get_default_conf();
         }
     }
     if (conf_path != NULL) {

src/redir.c

@@ -989,7 +989,7 @@ main(int argc, char **argv)
 
     if (argc == 1) {
         if (conf_path == NULL) {
-            conf_path = DEFAULT_CONF_PATH;
+            conf_path = get_default_conf();
         }
     }
 

src/server.c

@@ -1636,7 +1636,7 @@ main(int argc, char **argv)
 
     if (argc == 1) {
         if (conf_path == NULL) {
-            conf_path = DEFAULT_CONF_PATH;
+            conf_path = get_default_conf();
         }
     }
 

src/tunnel.c

@@ -921,7 +921,7 @@ main(int argc, char **argv)
 
     if (argc == 1) {
         if (conf_path == NULL) {
-            conf_path = DEFAULT_CONF_PATH;
+            conf_path = get_default_conf();
         }
     }
 

src/utils.c

@@ -474,3 +474,31 @@ set_nofile(int nofile)
 }
 
 #endif
+
+char *
+get_default_conf(void)
+{
+    static char sysconf[] = "/etc/shadowsocks-libev/config.json";
+    static char userconf[PATH_MAX] = { 0 };
+    char *conf_home;
+
+    if (userconf[0] != '\0')
+        return userconf;
+
+    conf_home = getenv("XDG_CONFIG_HOME");
+
+    if (!conf_home) {
+        strcpy(userconf, getenv("HOME"));
+        strcat(userconf, "/.config/shadowsocks-libev/config.json");
+    } else {
+        strcpy(userconf, conf_home);
+        strcat(userconf, "/shadowsocks-libev/config.json");
+    }
+
+    // Check if the user-specific config exists.
+    if (access(userconf, F_OK) != -1)
+        return userconf;
+
+    // If not, fall back to the system-wide config.
+    return sysconf;
+}

src/utils.h

@@ -173,4 +173,6 @@ void *ss_realloc(void *ptr, size_t new_size);
         ptr = NULL;      \
     } while (0)
 
+char *get_default_conf(void);
+
 #endif // _UTILS_H