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| author |   Ken Smith <kensmith@FreeBSD.org> | 2004-03-08 20:31:37 +0000 |
|---|---|---|
| committer | Ken Smith <kensmith@FreeBSD.org> | 2004-03-08 20:31:37 +0000 |
| commit | d922d6bbbb200681fda0a6d37742e400b0d4d587 (patch) | |
| tree | 8eb7fa07170faf30fb7c8b95b2002e312d6cb611 /pw/fileupd.c | |
| parent | 6d7976c0088abde23963a3cf0f10900fba6b4e05 (diff) | |
| download | pw-darwin-d922d6bbbb200681fda0a6d37742e400b0d4d587.tar.gz pw-darwin-d922d6bbbb200681fda0a6d37742e400b0d4d587.tar.zst pw-darwin-d922d6bbbb200681fda0a6d37742e400b0d4d587.zip | |
Shift file locking to source file instead of temp file. This fixes
data buffering issue that corrupts files if two pw(8)'s run at the
same time as well as changing pw(8) so it uses the same locking
mechanism as PAM, vipw(8), pwd_mkdb(8), etc.
PR: bin/23501
Submitted by: Alex Kapranoff <alex (at) kapran (dot) bitmcnit (dot) bryansk (dot) su>
Approved by: rwatson (mentor)
MFC after: 5 days
Diffstat (limited to 'pw/fileupd.c')
| -rw-r--r-- | pw/fileupd.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/pw/fileupd.c b/pw/fileupd.c index a846513..b88f4fa 100644 --- a/pw/fileupd.c +++ b/pw/fileupd.c @@ -76,7 +76,7 @@ fileupdate(char const * filename, mode_t fmode, char const * newline, char const if (pfxlen <= 1) rc = EINVAL; else { - int infd = open(filename, O_RDWR | O_CREAT, fmode); + int infd = open(filename, O_RDWR | O_CREAT | O_EXLOCK, fmode); if (infd == -1) rc = errno; @@ -92,7 +92,7 @@ fileupdate(char const * filename, mode_t fmode, char const * newline, char const strcpy(file, filename); strcat(file, ".new"); - outfd = open(file, O_RDWR | O_CREAT | O_TRUNC | O_EXLOCK, fmode); + outfd = open(file, O_RDWR | O_CREAT | O_TRUNC, fmode); if (outfd == -1) rc = errno; else { @@ -183,8 +183,6 @@ fileupdate(char const * filename, mode_t fmode, char const * newline, char const * to 'file'. * This is a gross hack, but we may have * corrupted the original file - * Unfortunately, it will lose the inode - * and hence the lock. */ if (fflush(infp) == EOF || ferror(infp)) rename(file, filename); |