1 files changed, 7 insertions, 1 deletions

diff --git a/src/firejail/util.c b/src/firejail/util.c
index f38b02fd0..4b2e09953 100644
--- a/src/firejail/util.c
+++ b/src/firejail/util.c
@@ -171,11 +171,17 @@ void logerr(const char *msg) {
 }
 
 
-// return -1 if error, 0 if no error
+// return -1 if error, 0 if no error; if destname already exists, return error
 int copy_file(const char *srcname, const char *destname, uid_t uid, gid_t gid, mode_t mode) {
         assert(srcname);
         assert(destname);
 
+        struct stat s;
+        if (stat(destname, &s) == 0) {
+                fprintf(stderr, "Error: file %s already exists\n", destname);
+                return -1;
+        }
+
         // open source
         int src = open(srcname, O_RDONLY);
         if (src < 0) {