diff options
| -rw-r--r-- | winsup/cygwin/syscalls.cc | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc index 8bb6ebae7..82ddad46d 100644 --- a/winsup/cygwin/syscalls.cc +++ b/winsup/cygwin/syscalls.cc @@ -4787,17 +4787,27 @@ fchmodat (int dirfd, const char *pathname, mode_t mode, int flags) tmp_pathbuf tp; __try { - if (flags) + if (flags & ~AT_SYMLINK_NOFOLLOW) { - /* BSD has lchmod, but Linux does not. POSIX says - AT_SYMLINK_NOFOLLOW is allowed to fail on symlinks; but Linux - blindly fails even for non-symlinks. */ - set_errno ((flags & ~AT_SYMLINK_NOFOLLOW) ? EINVAL : EOPNOTSUPP); + set_errno (EINVAL); __leave; } char *path = tp.c_get (); if (gen_full_path_at (path, dirfd, pathname)) __leave; + if (flags & AT_SYMLINK_NOFOLLOW) + { + /* BSD has lchmod, but Linux does not. POSIX says + AT_SYMLINK_NOFOLLOW is allowed to fail on symlinks. + Linux blindly fails even for non-symlinks, but we allow + it to succeed. */ + path_conv pc (path, PC_SYM_NOFOLLOW, stat_suffixes); + if (pc.issymlink ()) + { + set_errno (EOPNOTSUPP); + __leave; + } + } return chmod (path, mode); } __except (EFAULT) {} |