55 lines
1.7 KiB
C
55 lines
1.7 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 <sys/cdefs.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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/* Operations for flock() function */
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#define LOCK_SH 1 /* Shared lock. */
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#define LOCK_EX 2 /* Exclusive lock. */
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#define LOCK_NB 4 /* Don't block when locking. */
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#define LOCK_UN 8 /* Unlock. */
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/* Operations for access function */
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#define F_OK 0 /* does file exist */
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#define X_OK 1 /* is it executable or searchable by caller */
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#define W_OK 2 /* is it writable by caller */
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#define R_OK 4 /* is it readable by caller */
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/* Apply or remove an advisory lock on the file fd refers to. */
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__BEGIN_DECLS
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int _EXFUN(flock, (int, int));
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__END_DECLS
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#endif
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