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* Makefile.in: (DLL_OFILES): Add flock.o.

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* cygwin.din: Export flock.
	* flock.c: New file.
	* include/sys/file.h: Include sys/cdefs.h.
	Add function prototype for flock().
	Add some comments from BSD's header for further clarity.
	(L_SET, L_CURR, L_INCR, L_XTND): Redefine as the macros
	SEEK_SET, SEEK_CUR, SEEK_CUR, & SEEK_END respectively.
	(LOCK_SH,LOCK_EX,LOCK_NB,LOCK_UN): New macros for flock().
	* include/cygwin/version.h: Bump API minor number.
This commit is contained in:
Corinna Vinschen
2003-11-29 23:00:51 +00:00
parent b50fe8212f
commit f3a1e23eb3
6 changed files with 137 additions and 9 deletions
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36
winsup/cygwin/include/sys/file.h
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@ -11,20 +11,44 @@
** This file is distributed WITHOUT ANY WARRANTY; without even the implied
** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
/*
* 2003-11-27 Nicholas Wourms <nwourms@netscape.net>:
*
* Include sys/cdefs.h. Add function prototype for flock().
* Add some comments from BSD's header for further clarity.
* (L_SET, L_CURR, L_INCR, L_XTND): Redefine as the macros
* SEEK_SET, SEEK_CUR, SEEK_CUR, & SEEK_END respectively.
* (LOCK_SH,LOCK_EX,LOCK_NB,LOCK_UN): New macros for flock().
*/
#ifndef _FILE_H_
#define _FILE_H_
#include <sys/cdefs.h>
#include <fcntl.h>
#define L_SET 0
#define L_CURR 1
#define L_INCR 1
#define L_XTND 2
/* Whence values for lseek(); renamed by POSIX 1003.1 */
#define L_SET SEEK_SET
#define L_CURR SEEK_CUR
#define L_INCR SEEK_CUR
#define L_XTND SEEK_END
/* Operations for flock() function */
#define LOCK_SH 1 /* Shared lock. */
#define LOCK_EX 2 /* Exclusive lock. */
#define LOCK_NB 4 /* Don't block when locking. */
#define LOCK_UN 8 /* Unlock. */
/* Operations for access function */
#define F_OK 0 /* does file exist */
#define X_OK 1 /* is it executable by caller */
#define X_OK 1 /* is it executable or searchable by caller */
#define W_OK 2 /* is it writable by caller */
#define R_OK 4 /* is it readable by caller */
/* Apply or remove an advisory lock on the file fd refers to. */
__BEGIN_DECLS
int _EXFUN(flock, (int, int));
__END_DECLS
#endif