1 files changed, 44 insertions, 0 deletions
diff --git a/lib/targetdir.h b/lib/targetdir.h
new file mode 100644
index 0000000..558853e
--- /dev/null
+++ b/lib/targetdir.h
@@ -0,0 +1,44 @@
+/* Target directory operands for coreutils
+
+   Copyright 2022 Free Software Foundation, Inc.
+
+   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 3 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.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <fcntl.h>
+#include <stdbool.h>
+#include <sys/stat.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+# error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef TARGETDIR_INLINE
+# define TARGETDIR_INLINE _GL_INLINE
+#endif
+
+/* Return a file descriptor open to FILE, for use in openat.
+   As an optimization, return AT_FDCWD if FILE must be the working directory.
+   As a side effect, possibly set *ST to the file's status.
+   Fail and set errno if FILE is not a directory.
+   On failure return -2 if AT_FDCWD is -1, -1 otherwise.  */
+extern int target_directory_operand (char const *file, struct stat *st);
+
+/* Return true if FD represents success for target_directory_operand.  */
+TARGETDIR_INLINE _GL_ATTRIBUTE_PURE bool
+target_dirfd_valid (int fd)
+{
+  return fd != -1 - (AT_FDCWD == -1);
+}
+
+_GL_INLINE_HEADER_END