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author | Ulrich Drepper <drepper@redhat.com> | 2000-02-29 08:02:20 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2000-02-29 08:02:20 +0000 |
commit | 522dc8552e844b12fa505404585f922b50cc2ea2 (patch) | |
tree | 4f1c3f3b18f8a589e60e9b2b420b4dd9b454d910 /io/lockf.c | |
parent | 6df9984c58b05a68b3556c2e976fbfe12a972a28 (diff) | |
download | glibc-522dc8552e844b12fa505404585f922b50cc2ea2.zip glibc-522dc8552e844b12fa505404585f922b50cc2ea2.tar.gz glibc-522dc8552e844b12fa505404585f922b50cc2ea2.tar.bz2 |
Update.
* io/lockf.c: Moved to...
* sysdeps/generic/lockf.c: ...here.
Diffstat (limited to 'io/lockf.c')
-rw-r--r-- | io/lockf.c | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/io/lockf.c b/io/lockf.c deleted file mode 100644 index 6e8851b..0000000 --- a/io/lockf.c +++ /dev/null @@ -1,70 +0,0 @@ -/* Copyright (C) 1994, 1996, 1997, 1998 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <sys/types.h> -#include <unistd.h> -#include <fcntl.h> -#include <errno.h> -#include <string.h> - -/* lockf is a simplified interface to fcntl's locking facilities. */ - -int -lockf (int fd, int cmd, off_t len) -{ - struct flock fl; - - memset ((char *) &fl, '\0', sizeof (fl)); - - /* lockf is always relative to the current file position. */ - fl.l_whence = SEEK_CUR; - fl.l_start = 0; - fl.l_len = len; - - switch (cmd) - { - case F_TEST: - /* Test the lock: return 0 if FD is unlocked or locked by this process; - return -1, set errno to EACCES, if another process holds the lock. */ - if (__fcntl (fd, F_GETLK, &fl) < 0) - return -1; - if (fl.l_type == F_UNLCK || fl.l_pid == __getpid ()) - return 0; - __set_errno (EACCES); - return -1; - - case F_ULOCK: - fl.l_type = F_UNLCK; - cmd = F_SETLK; - break; - case F_LOCK: - fl.l_type = F_WRLCK; - cmd = F_SETLKW; - break; - case F_TLOCK: - fl.l_type = F_WRLCK; - cmd = F_SETLK; - break; - - default: - __set_errno (EINVAL); - return -1; - } - - return __fcntl (fd, cmd, &fl); -} |