posix-io/chmod.c

/*	A part of the Windows CE C Extra Library (celibc)
	Copyright 2007-2015 PC GO Ld.

	This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
*/

#include <sys/stat.h>
#include <windows.h>
#include <stdlib.h>
#include <limits.h>
#include <errno.h>

int chmod(const char *path, mode_t mode) {
	if(!path) {
		errno = EFAULT;
		return -1;
	}
	size_t len = strlen(path) + 1;
	if(len == 1) {
		errno = ENOENT;
		return -1;
	}
	if(len > PATH_MAX + 1) {
		errno = ENAMETOOLONG;
		return -1;
	}
	wchar_t wpath[len];
	if((int)mbstowcs(wpath, path, len) < 0) return -1;

	unsigned long int attrib = GetFileAttributesW(wpath);
	if(attrib == 0xffffffff) return -1;

	if(mode & S_IWRITE) attrib &= ~FILE_ATTRIBUTE_READONLY;
	else attrib |= FILE_ATTRIBUTE_READONLY;

	return SetFileAttributes(wpath, attrib) ? 0 : -1;
}