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author | Ulrich Drepper <drepper@redhat.com> | 2005-12-14 15:06:39 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2005-12-14 15:06:39 +0000 |
commit | 9d13fb2413921c713f83efe331e8e4d219c62c6b (patch) | |
tree | 2d44d7ac45ab2d147eb8361bbff880c365aa8ad5 /sysdeps/generic/lockf.c | |
parent | b6ab06cef4670e02756bcdd4d2c33a49369a4346 (diff) | |
download | glibc-9d13fb2413921c713f83efe331e8e4d219c62c6b.zip glibc-9d13fb2413921c713f83efe331e8e4d219c62c6b.tar.gz glibc-9d13fb2413921c713f83efe331e8e4d219c62c6b.tar.bz2 |
Moved to csu/errno-loc.c.
Diffstat (limited to 'sysdeps/generic/lockf.c')
-rw-r--r-- | sysdeps/generic/lockf.c | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/sysdeps/generic/lockf.c b/sysdeps/generic/lockf.c deleted file mode 100644 index 7b23f66..0000000 --- a/sysdeps/generic/lockf.c +++ /dev/null @@ -1,74 +0,0 @@ -/* Copyright (C) 1994,1996,1997,1998,2000,2003 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 Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; 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. */ - fl.l_type = F_RDLCK; - 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; - } - - /* lockf() is a cancellation point but so is fcntl() if F_SETLKW is - used. Therefore we don't have to care about cancellation here, - the fcntl() function will take care of it. */ - return __fcntl (fd, cmd, &fl); -} |