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unistd.h

by Paul McJones last modified 2007-02-02 09:32

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/* @(#) unistd.h 1.3 1/27/86 17:47:23 */
/*ident	"@(#)cfront:incl/unistd.h	1.3"*/
  
/* Symbolic constants for the "access" routine: */
#define	R_OK	4	/* Test for Read permission */
#define	W_OK	2	/* Test for Write permission */
#define	X_OK	1	/* Test for eXecute permission */
#define	F_OK	0	/* Test for existence of File */

#define F_ULOCK	0	/* Unlock a previously locked region */
#define F_LOCK	1	/* Lock a region for exclusive use */
#define F_TLOCK	2	/* Test and lock a region for exclusive use */
#define F_TEST	3	/* Test a region for other processes locks */


/* Symbolic constants for the "lseek" routine: */
#define	SEEK_SET	0	/* Set file pointer to "offset" */
#define	SEEK_CUR	1	/* Set file pointer to current plus "offset" */
#define	SEEK_END	2	/* Set file pointer to EOF plus "offset" */

/* Path names: */
#define	GF_PATH	"/etc/group"	/* Path name of the "group" file */
#define	PF_PATH	"/etc/passwd"	/* Path name of the "passwd" file */

extern int lockf(int, int, long),
           access (const char*, int);
extern long lseek(int, long, int);
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