Use the open(2) flag O_EXCL to ensure the file doesn't already exist
instead of (racily) calling stat(2) through file_exists(). While at it
switch to xopen() to reduce code duplication and get more consistent
error messages.
Signed-off-by: Rene Scharfe <l....@web.de>
---
notes-merge.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/notes-merge.c b/notes-merge.c
index b7814c9..2b29fc4 100644
--- a/notes-merge.c
+++ b/notes-merge.c
@@ -298,12 +298,8 @@ static void write_buf_to_worktree(const unsigned char *obj,
char *path = git_pathdup(NOTES_MERGE_WORKTREE "/%s", sha1_to_hex(obj));
if (safe_create_leading_directories_const(path))
die_errno("unable to create directory for '%s'", path);
- if (file_exists(path))
- die("found existing file at '%s'", path);
- fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0666);
- if (fd < 0)
- die_errno("failed to open '%s'", path);
+ fd = xopen(path, O_WRONLY | O_EXCL | O_CREAT, 0666);
while (size > 0) {
long ret = write_in_full(fd, buf, size);
--
2.9.0
--
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