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| author | asomers <asomers@FreeBSD.org> | 2016-12-16 20:49:50 +0000 |
|---|---|---|
| committer | asomers <asomers@FreeBSD.org> | 2016-12-16 20:49:50 +0000 |
| commit | ce9e78822f045ebdeb7cf9f2185e2679e1959af0 (patch) | |
| tree | 6c81ccd80c14d16e66de274bb59a74770de61a2b /usr.sbin/pw/pwupd.c | |
| parent | bad6a620da0682cbcda223b7ec0b7f2a097ebbd0 (diff) | |
| download | FreeBSD-src-ce9e78822f045ebdeb7cf9f2185e2679e1959af0.zip FreeBSD-src-ce9e78822f045ebdeb7cf9f2185e2679e1959af0.tar.gz | |
MFC r308806
Speed up pw operations that edit /etc/group or /etc/passwd
r285050 fixed a bug in pw that could lead to /etc/passwd or /etc/group
corruption on power loss. However, it fixed it by opening those files with
O_SYNC, which is very slow, especially on ZFS. This change replaces O_SYNC with
appropriately placed fsync()s instead, which is much faster. Using a ZFS
tmpdir, the time to run pw's kyua tests drops from 245s to 35s.
Diffstat (limited to 'usr.sbin/pw/pwupd.c')
| -rw-r--r-- | usr.sbin/pw/pwupd.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/usr.sbin/pw/pwupd.c b/usr.sbin/pw/pwupd.c index 3bcb95f..87c3c99 100644 --- a/usr.sbin/pw/pwupd.c +++ b/usr.sbin/pw/pwupd.c @@ -114,6 +114,7 @@ pw_update(struct passwd * pwd, char const * user) close(tfd); err(1, "pw_copy()"); } + fsync(tfd); close(tfd); /* * in case of deletion of a user, the whole database |
