[hcoop/debian/courier-authlib.git] / liblock / lockflock.c

/*
** Copyright 1998 - 1999 Double Precision, Inc.  See COPYING for
** distribution information.
*/

/* $Id: lockflock.c,v 1.3 1999/12/06 13:18:55 mrsam Exp $ */
#if	HAVE_CONFIG_H
#include	"config.h"
#endif
#include	<sys/types.h>
#if	HAVE_FCNTL_H
#include	<fcntl.h>
#endif
#if	HAVE_SYS_FCNTL_H
#include	<sys/fcntl.h>
#endif
#if	HAVE_SYS_FILE_H
#include	<sys/file.h>
#endif
#include	<errno.h>
#include	"liblock.h"

int	ll_lockfd(int fd, int ltype, LL_OFFSET_TYPE start, LL_OFFSET_TYPE len)
{
	if (start || len
		|| (ltype & ll_whence_curpos)
		|| (ltype & ll_whence_end))
	{
		errno=EINVAL;
		return (-1);
	}

	return (flock(fd, ltype & ll_unlock ? LOCK_UN:
		(ltype & ll_writelock ? LOCK_EX:LOCK_SH) |
		(ltype & ll_wait ? 0:LOCK_NB)));
}
Commit	Line	Data
d9898ee8	1	/*
	2	** Copyright 1998 - 1999 Double Precision, Inc. See COPYING for
	3	** distribution information.
	4	*/
	5
	6	/* $Id: lockflock.c,v 1.3 1999/12/06 13:18:55 mrsam Exp $ */
	7	#if HAVE_CONFIG_H
	8	#include "config.h"
	9	#endif
	10	#include <sys/types.h>
	11	#if HAVE_FCNTL_H
	12	#include <fcntl.h>
	13	#endif
	14	#if HAVE_SYS_FCNTL_H
	15	#include <sys/fcntl.h>
	16	#endif
	17	#if HAVE_SYS_FILE_H
	18	#include <sys/file.h>
	19	#endif
	20	#include <errno.h>
	21	#include "liblock.h"
	22
	23	int ll_lockfd(int fd, int ltype, LL_OFFSET_TYPE start, LL_OFFSET_TYPE len)
	24	{
	25	if (start \|\| len
	26	\|\| (ltype & ll_whence_curpos)
	27	\|\| (ltype & ll_whence_end))
	28	{
	29	errno=EINVAL;
	30	return (-1);
	31	}
	32
	33	return (flock(fd, ltype & ll_unlock ? LOCK_UN:
	34	(ltype & ll_writelock ? LOCK_EX:LOCK_SH) \|
	35	(ltype & ll_wait ? 0:LOCK_NB)));
	36	}