| /* |
| * 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 |