improve copy_file

don't report success if read failed

1 files changed, 4 insertions, 3 deletions

diff --git a/src/firejail/util.c b/src/firejail/util.c
index 9f878611a..02befdc12 100644
--- a/src/firejail/util.c
+++ b/src/firejail/util.c
@@ -33,7 +33,7 @@
 
 #include <fcntl.h>
 #ifndef O_PATH
-# define O_PATH 010000000
+#define O_PATH 010000000
 #endif
 
 #define MAX_GROUPS 1024
@@ -281,8 +281,9 @@ static int copy_file_by_fd(int src, int dst) {
                         done += rv;
                 }
         }
-//      fflush(0);
-        return 0;
+        if (len == 0)
+                return 0;
+        return -1;
 }
 
 // return -1 if error, 0 if no error; if destname already exists, return error