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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
*
* Copyright (C) 2014,2015 Colin Walters <walters@verbum.org>.
* SPDX-License-Identifier: LGPL-2.0-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#pragma once
#include <glnx-backport-autocleanups.h>
#include <glnx-macros.h>
#include <glnx-errors.h>
#include <limits.h>
#include <dirent.h>
#include <sys/stat.h>
#include <fcntl.h>
G_BEGIN_DECLS
/**
* glnx_dirfd_canonicalize:
* @fd: A directory file descriptor
*
* It's often convenient in programs to use `-1` for "unassigned fd",
* and also because gobject-introspection doesn't support `AT_FDCWD`,
* libglnx honors `-1` to mean `AT_FDCWD`. This small inline function
* canonicalizes `-1 -> AT_FDCWD`.
*/
static inline int
glnx_dirfd_canonicalize (int fd)
{
if (fd == -1)
return AT_FDCWD;
return fd;
}
struct GLnxDirFdIterator {
gboolean initialized;
int fd;
gpointer padding_data[4];
};
typedef struct GLnxDirFdIterator GLnxDirFdIterator;
gboolean glnx_dirfd_iterator_init_at (int dfd, const char *path,
gboolean follow,
GLnxDirFdIterator *dfd_iter, GError **error);
gboolean glnx_dirfd_iterator_init_take_fd (int *dfd, GLnxDirFdIterator *dfd_iter, GError **error);
gboolean glnx_dirfd_iterator_next_dent (GLnxDirFdIterator *dfd_iter,
struct dirent **out_dent,
GCancellable *cancellable,
GError **error);
gboolean glnx_dirfd_iterator_next_dent_ensure_dtype (GLnxDirFdIterator *dfd_iter,
struct dirent **out_dent,
GCancellable *cancellable,
GError **error);
void glnx_dirfd_iterator_rewind (GLnxDirFdIterator *dfd_iter);
void glnx_dirfd_iterator_clear (GLnxDirFdIterator *dfd_iter);
G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(GLnxDirFdIterator, glnx_dirfd_iterator_clear)
int glnx_opendirat_with_errno (int dfd,
const char *path,
gboolean follow);
gboolean glnx_opendirat (int dfd,
const char *path,
gboolean follow,
int *out_fd,
GError **error);
char *glnx_fdrel_abspath (int dfd,
const char *path);
void glnx_gen_temp_name (gchar *tmpl);
/**
* glnx_ensure_dir:
* @dfd: directory fd
* @path: Directory path
* @mode: Mode
* @error: Return location for a #GError, or %NULL
*
* Wrapper around mkdirat() which adds #GError support, ensures that
* it retries on %EINTR, and also ignores `EEXIST`.
*
* See also `glnx_shutil_mkdir_p_at()` for recursive handling.
*
* Returns: %TRUE on success, %FALSE otherwise
*/
static inline gboolean
glnx_ensure_dir (int dfd,
const char *path,
mode_t mode,
GError **error)
{
if (TEMP_FAILURE_RETRY (mkdirat (dfd, path, mode)) != 0)
{
if (G_UNLIKELY (errno != EEXIST))
return glnx_throw_errno_prefix (error, "mkdirat(%s)", path);
}
return TRUE;
}
typedef struct {
gboolean initialized;
int src_dfd;
int fd;
char *path;
} GLnxTmpDir;
gboolean glnx_tmpdir_delete (GLnxTmpDir *tmpf, GCancellable *cancellable, GError **error);
void glnx_tmpdir_unset (GLnxTmpDir *tmpf);
static inline void
glnx_tmpdir_cleanup (GLnxTmpDir *tmpf)
{
(void)glnx_tmpdir_delete (tmpf, NULL, NULL);
}
G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(GLnxTmpDir, glnx_tmpdir_cleanup)
gboolean glnx_mkdtempat (int dfd, const char *tmpl, int mode,
GLnxTmpDir *out_tmpdir, GError **error);
gboolean glnx_mkdtemp (const char *tmpl, int mode,
GLnxTmpDir *out_tmpdir, GError **error);
G_END_DECLS
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