Plan 9 from Bell Labs’s /usr/web/sources/patch/applied/ape-chmod-dirbit/chmod.c

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


#include "lib.h"
#include <errno.h>
#include <stdlib.h>
#include "sys9.h"
#include "dir.h"

int
chmod(const char *path, mode_t mode)
{
	Dir d, *dir;

	dir = _dirstat(path);
	if(dir == nil){
error:
		_syserrno();
		return -1;
	}
	_nulldir(&d);
	d.mode = (dir->mode & ~0777) | (mode & 0777);
	free(dir);
	if(_dirwstat(path, &d) < 0)
		goto error;

	return 0;
}

int
fchmod(int fd, mode_t mode)
{
	Dir d, *dir;

	dir = _dirfstat(fd);
	if(dir == nil){
error:
		_syserrno();
		return -1;
	}
	_nulldir(&d);
	d.mode = (dir->mode & ~ 0777) | (mode & 0777);
	free(dir);
	if(_dirfwstat(fd, &d) < 0)
		goto error;

	return 0;
}

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