Plan 9 from Bell Labs’s /usr/web/sources/contrib/rsc/linuxemu/libc/port/access.c

Copyright © 2021 Plan 9 Foundation.
Distributed under the MIT License.
Download the Plan 9 distribution.


#include <u.h>
#include <libc.h>

int
access(char *name, int mode)
{
	int fd;
	Dir d;

	static char omode[] = {
		0,
		OEXEC,
		OWRITE,
		ORDWR,
		OREAD,
		ORDWR,
		ORDWR,
		ORDWR
	};

	if(mode == AEXIST){
		if(dirstat(name, &d) >= 0)
			return 0;
		return -1;
	}
	fd = open(name, omode[mode&7]);
	if(fd >= 0){
		close(fd);
		return 0;
	}
	return -1;
}

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