Re: [libvirt] [PATCH 02/14] Add virFileLock and virFileUnlock APIs

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; Add some simple wrappers around the fcntl() discretionary file locking capability. * src/util/util.c, src/util/util.h, src/libvirt_private.syms: Add virFileLock and virFileUnlock APIs --- src/libvirt_private.syms | 2 ++ src/util/util.c | 33 +++++++++++++++++++++++++++++++++ src/util/util.h | 3 +++ 3 files changed, 38 insertions(+), 0 deletions(-) + +int virFileLock(int fd, bool shared, off_t start, off_t len) +{ + struct flock fl = { + .l_type = shared ? F_RDLCK : F_WRLCK, + .l_whence = SEEK_SET, + .l_start = start, + .l_len = len, + };