Ultrix-3.1/src/libc/sysV/ftok.c

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/**********************************************************************
 *   Copyright (c) Digital Equipment Corporation 1984, 1985, 1986.    *
 *   All Rights Reserved. 					      *
 *   Reference "/usr/src/COPYRIGHT" for applicable restrictions.      *
 **********************************************************************/

/*	SCCSID: @(#)ftok.c	3.0	4/22/86	*/
/*	(System 5)	1.2	*/
#include <sys/types.h>
#include <sys/stat.h>
/*#include <sys/sysmacros.h>*/

key_t
ftok(path, id)
char *path;
char id;
{
	struct stat st;

	return(stat(path, &st) < 0 ? (key_t)-1 :
	    (key_t)((key_t)id << 24 | ((long)(unsigned)minor(st.st_dev)) << 16 |
		(unsigned)st.st_ino));
}