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/*
* fchmodat() for uClibc
*
* Copyright (C) 2009 Analog Devices Inc.
* Copyright (C) 2012 Mike Frysinger
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <fcntl.h>
#include <sys/syscall.h>
#include <sys/stat.h>
#ifdef __NR_fchmodat
/*
* The kernel takes 3 args, but userland takes 4.
* We have to process all the flags ourselves.
*/
int fchmodat(int fd, const char *file, mode_t mode, int flag)
{
/* We only support one flag atm ... */
if (flag & ~AT_SYMLINK_NOFOLLOW) {
__set_errno(EINVAL);
return -1;
}
/* ... but Linux doesn't support perms on symlinks. */
if (flag & AT_SYMLINK_NOFOLLOW) {
__set_errno(ENOTSUP);
return -1;
}
return INLINE_SYSCALL(fchmodat, 3, fd, file, mode);
}
#else
/* should add emulation with fchmod() and /proc/self/fd/ ... */
#endif
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