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fileio: introduce WRITE_STRING_FILE_NOFOLLOW flag for write_string_file() and friends

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This commit is contained in:
Yu Watanabe 2018-11-06 21:23:03 +09:00
parent 57512c893e
commit 835d18ba20
2 changed files with 2 additions and 1 deletions
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2
src/basic/fileio.c
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@ -160,7 +160,7 @@ int write_string_file_ts(
/* We manually build our own version of fopen(..., "we") that
* works without O_CREAT */
fd = open(fn, O_WRONLY|O_CLOEXEC|O_NOCTTY);
fd = open(fn, O_WRONLY|O_CLOEXEC|O_NOCTTY | ((flags & WRITE_STRING_FILE_NOFOLLOW) ? O_NOFOLLOW : 0));
if (fd < 0) {
r = -errno;
goto fail;

1
src/basic/fileio.h
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@ -17,6 +17,7 @@ typedef enum {
WRITE_STRING_FILE_VERIFY_ON_FAILURE = 1 << 3,
WRITE_STRING_FILE_SYNC = 1 << 4,
WRITE_STRING_FILE_DISABLE_BUFFER = 1 << 5,
WRITE_STRING_FILE_NOFOLLOW = 1 << 6,
/* And before you wonder, why write_string_file_atomic_label_ts() is a separate function instead of just one
more flag here: it's about linking: we don't want to pull -lselinux into all users of write_string_file()