56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/* This is file FILE.H */
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/*
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** Copyright (C) 1991 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
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**
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** This file is distributed under the terms listed in the document
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** "copying.dj", available from DJ Delorie at the address above.
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** A copy of "copying.dj" should accompany this file; if not, a copy
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** should be available from where this file was obtained. This file
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** may not be distributed without a verbatim copy of "copying.dj".
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**
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** This file is distributed WITHOUT ANY WARRANTY; without even the implied
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** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/*
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* 2003-11-27 Nicholas Wourms <nwourms@netscape.net>:
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*
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* Include sys/cdefs.h. Add function prototype for flock().
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* Add some comments from BSD's header for further clarity.
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* (L_SET, L_CURR, L_INCR, L_XTND): Redefine as the macros
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* SEEK_SET, SEEK_CUR, SEEK_CUR, & SEEK_END respectively.
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* (LOCK_SH,LOCK_EX,LOCK_NB,LOCK_UN): New macros for flock().
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*/
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#ifndef _FILE_H_
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#define _FILE_H_
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#include <fcntl.h>
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/* Whence values for lseek(); renamed by POSIX 1003.1 */
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#define L_SET SEEK_SET
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#define L_CURR SEEK_CUR
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#define L_INCR SEEK_CUR
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#define L_XTND SEEK_END
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/* Including <sys/file.h> always defines flock & macros. */
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#if __BSD_VISIBLE - 0 == 0
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#define LOCK_SH 0x01 /* shared file lock */
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#define LOCK_EX 0x02 /* exclusive file lock */
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#define LOCK_NB 0x04 /* don't block when locking */
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#define LOCK_UN 0x08 /* unlock file */
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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extern int flock (int, int);
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#ifdef __cplusplus
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}
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#endif
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#endif
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#endif
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