fix memory leak on failure in realpath

diff --git a/src/misc/realpath.c b/src/misc/realpath.c
index 8dcf5ec9fc8792e0299b656fee5a11700ad2348a..ef156fcf8aaf1cb808e4a3760a46df3855676ce8 100644 (file)
--- a/src/misc/realpath.c
+++ b/src/misc/realpath.c
@@ -19,16 +19,16 @@ char *realpath(const char *filename, char *resolved)
                return 0;
        }
 
+       fd = open(filename, O_RDONLY|O_NONBLOCK);
+       if (fd < 0) return 0;
+       snprintf(buf, sizeof buf, "/proc/self/fd/%d", fd);
+
        if (!resolved) {
                alloc = 1;
                resolved = malloc(PATH_MAX);
                if (!resolved) return 0;
        }
 
-       fd = open(filename, O_RDONLY|O_NONBLOCK);
-       if (fd < 0) return 0;
-       snprintf(buf, sizeof buf, "/proc/self/fd/%d", fd);
-
        r = readlink(buf, resolved, PATH_MAX-1);
        if (r < 0) goto err;
        resolved[r] = 0;