die with sensible error message if socket path too long

2026-05-18 23:26:48 +01:00
parent 9569ba3cfa
commit 262fc6437c
1 changed files with 5 additions and 1 deletions
@@ -32,7 +32,11 @@ static void handle_sigchld(int num) {
 int open_socket(char * pathname) {
    struct sockaddr_un addr;
    addr.sun_family = AF_UNIX;
-    strncpy(addr.sun_path, pathname, sizeof(addr.sun_path) - 1);
+    if(strlen(pathname) > sizeof(addr.sun_path)) {
+        die("pathname \"%s\" is too long to  bind as unix socket (max %lu)",
+            pathname, sizeof(addr.sun_path));
+    }
+    strcpy(addr.sun_path, pathname);

    int fd = socket(AF_LOCAL, SOCK_DGRAM, PF_LOCAL);
    if(fd < 0) {