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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:40:04 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:40:04 +0000 |
commit | 25505898530a333011f4fd5cbc841ad6b26c089c (patch) | |
tree | 333a33fdd60930bcccc3f177ed9467d535e9bac6 /openbsd-compat/bsd-flock.c | |
parent | Initial commit. (diff) | |
download | openssh-upstream.tar.xz openssh-upstream.zip |
Adding upstream version 1:9.2p1.upstream/1%9.2p1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'openbsd-compat/bsd-flock.c')
-rw-r--r-- | openbsd-compat/bsd-flock.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/openbsd-compat/bsd-flock.c b/openbsd-compat/bsd-flock.c new file mode 100644 index 0000000..9b15d1e --- /dev/null +++ b/openbsd-compat/bsd-flock.c @@ -0,0 +1,81 @@ +/* $NetBSD: flock.c,v 1.6 2008/04/28 20:24:12 martin Exp $ */ + +/*- + * Copyright (c) 2001 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Todd Vierling. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * Emulate flock() with fcntl(), where available. + * Otherwise, don't do locking; just pretend success. + */ + +#include "includes.h" + +#ifndef HAVE_FLOCK +#include <errno.h> +#include <fcntl.h> + +int +flock(int fd, int op) +{ + int rc = 0; + +#if defined(F_SETLK) && defined(F_SETLKW) + struct flock fl = {0}; + + switch (op & (LOCK_EX|LOCK_SH|LOCK_UN)) { + case LOCK_EX: + fl.l_type = F_WRLCK; + break; + + case LOCK_SH: + fl.l_type = F_RDLCK; + break; + + case LOCK_UN: + fl.l_type = F_UNLCK; + break; + + default: + errno = EINVAL; + return -1; + } + + fl.l_whence = SEEK_SET; + rc = fcntl(fd, op & LOCK_NB ? F_SETLK : F_SETLKW, &fl); + + if (rc && (errno == EAGAIN)) + errno = EWOULDBLOCK; +#else + rc = -1; + errno = ENOSYS; +#endif + + return rc; +} +#endif |