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40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
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* Copyright 1998,1999 The OpenLDAP Foundation, Redwood City, California, USA
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted only
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* as authorized by the OpenLDAP Public License. A copy of this
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* license is available at http://www.OpenLDAP.org/license.html or
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* in file LICENSE in the top-level directory of the distribution.
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*/
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/* Simple file locking method for systems without */
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#include "portable.h"
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#include <stdio.h>
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#include <ac/unistd.h>
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#ifdef NEED_SIMPLE_LOCKING
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int lutil_lockf ( FILE *fp ) {
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struct flock file_lock;
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memset( &file_lock, 0, sizeof( file_lock ) );
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file_lock.l_type = F_WRLCK;
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file_lock.l_whence = SEEK_SET;
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file_lock.l_start = 0;
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file_lock.l_len = 0;
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return( fcntl( fileno(fp), F_SETLKW, &file_lock ) );
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}
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int lutil_unlockf ( FILE *fp ) {
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struct flock file_lock;
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memset( &file_lock, 0, sizeof( file_lock ) );
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file_lock.l_type = F_UNLCK;
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file_lock.l_whence = SEEK_SET;
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file_lock.l_start = 0;
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file_lock.l_len = 0;
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return ( fcntl( fileno(fp), F_SETLK, &file_lock ) );
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}
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#endif /* NEED_SIMPLE_LOCKING */
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