diff options
Diffstat (limited to 'src/w32.c')
| -rw-r--r-- | src/w32.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/w32.c b/src/w32.c index 5011642adf2..aff9771e4bb 100644 --- a/src/w32.c +++ b/src/w32.c @@ -3402,10 +3402,13 @@ int sys_open (const char * path, int oflag, int mode) { const char* mpath = map_w32_filename (path, NULL); - /* Try to open file without _O_CREAT, to be able to write to hidden - and system files. Force all file handles to be - non-inheritable. */ - int res = _open (mpath, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode); + int res = -1; + + /* If possible, try to open file without _O_CREAT, to be able to + write to existing hidden and system files. Force all file + handles to be non-inheritable. */ + if ((oflag & (_O_CREAT | _O_EXCL)) != (_O_CREAT | _O_EXCL)) + res = _open (mpath, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode); if (res < 0) res = _open (mpath, oflag | _O_NOINHERIT, mode); if (res >= 0 && res < MAXDESC) |