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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
*
* Copyright (C) 2014,2015 Colin Walters <walters@verbum.org>.
*
* 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 <gio/gfiledescriptorbased.h>
#include <limits.h>
#include <dirent.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <sys/xattr.h>
/* From systemd/src/shared/util.h */
/* When we include libgen.h because we need dirname() we immediately
* undefine basename() since libgen.h defines it as a macro to the XDG
* version which is really broken. */
#include <libgen.h>
#undef basename
#include <glnx-errors.h>
G_BEGIN_DECLS
/* Irritatingly, g_basename() which is what we want
* is deprecated.
*/
static inline
const char *glnx_basename (const char *path)
{
return (basename) (path);
}
typedef struct {
int src_dfd;
int fd;
char *path;
} GLnxTmpfile;
#define GLNX_TMPFILE_INIT { .fd = -1 };
void glnx_tmpfile_clear (GLnxTmpfile *tmpf);
G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(GLnxTmpfile, glnx_tmpfile_clear);
gboolean
glnx_open_tmpfile_linkable_at (int dfd,
const char *subpath,
int flags,
GLnxTmpfile *out_tmpf,
GError **error);
typedef enum {
GLNX_LINK_TMPFILE_REPLACE,
GLNX_LINK_TMPFILE_NOREPLACE,
GLNX_LINK_TMPFILE_NOREPLACE_IGNORE_EXIST
} GLnxLinkTmpfileReplaceMode;
gboolean
glnx_link_tmpfile_at (GLnxTmpfile *tmpf,
GLnxLinkTmpfileReplaceMode flags,
int target_dfd,
const char *target,
GError **error);
GBytes *
glnx_fd_readall_bytes (int fd,
GCancellable *cancellable,
GError **error);
char *
glnx_fd_readall_utf8 (int fd,
gsize *out_len,
GCancellable *cancellable,
GError **error);
char *
glnx_file_get_contents_utf8_at (int dfd,
const char *subpath,
gsize *out_len,
GCancellable *cancellable,
GError **error);
/**
* GLnxFileReplaceFlags:
* @GLNX_FILE_REPLACE_DATASYNC_NEW: Call fdatasync() even if the file did not exist
* @GLNX_FILE_REPLACE_NODATASYNC: Never call fdatasync()
*
* Flags controlling file replacement.
*/
typedef enum {
GLNX_FILE_REPLACE_DATASYNC_NEW = (1 << 0),
GLNX_FILE_REPLACE_NODATASYNC = (1 << 1),
} GLnxFileReplaceFlags;
gboolean
glnx_file_replace_contents_at (int dfd,
const char *subpath,
const guint8 *buf,
gsize len,
GLnxFileReplaceFlags flags,
GCancellable *cancellable,
GError **error);
gboolean
glnx_file_replace_contents_with_perms_at (int dfd,
const char *subpath,
const guint8 *buf,
gsize len,
mode_t mode,
uid_t uid,
gid_t gid,
GLnxFileReplaceFlags flags,
GCancellable *cancellable,
GError **error);
char *
glnx_readlinkat_malloc (int dfd,
const char *subpath,
GCancellable *cancellable,
GError **error);
int
glnx_loop_write (int fd, const void *buf, size_t nbytes);
int
glnx_regfile_copy_bytes (int fdf, int fdt, off_t max_bytes, gboolean try_reflink);
typedef enum {
GLNX_FILE_COPY_OVERWRITE = (1 << 0),
GLNX_FILE_COPY_NOXATTRS = (1 << 1),
GLNX_FILE_COPY_DATASYNC = (1 << 2)
} GLnxFileCopyFlags;
gboolean
glnx_file_copy_at (int src_dfd,
const char *src_subpath,
struct stat *src_stbuf,
int dest_dfd,
const char *dest_subpath,
GLnxFileCopyFlags copyflags,
GCancellable *cancellable,
GError **error);
gboolean
glnx_stream_fstat (GFileDescriptorBased *stream,
struct stat *stbuf,
GError **error);
int glnx_renameat2_noreplace (int olddirfd, const char *oldpath,
int newdirfd, const char *newpath);
int glnx_renameat2_exchange (int olddirfd, const char *oldpath,
int newdirfd, const char *newpath);
/**
* glnx_fstat:
* @fd: FD to stat
* @buf: (out caller-allocates): Return location for stat details
* @error: Return location for a #GError, or %NULL
*
* Wrapper around fstat() which adds #GError support and ensures that it retries
* on %EINTR.
*
* Returns: %TRUE on success, %FALSE otherwise
* Since: UNRELEASED
*/
static inline gboolean
glnx_fstat (int fd,
struct stat *buf,
GError **error)
{
if (TEMP_FAILURE_RETRY (fstat (fd, buf)) != 0)
return glnx_throw_errno (error);
return TRUE;
}
/**
* glnx_fstatat:
* @dfd: Directory FD to stat beneath
* @path: Path to stat beneath @dfd
* @buf: (out caller-allocates): Return location for stat details
* @flags: Flags to pass to fstatat()
* @error: Return location for a #GError, or %NULL
*
* Wrapper around fstatat() which adds #GError support and ensures that it
* retries on %EINTR.
*
* Returns: %TRUE on success, %FALSE otherwise
* Since: UNRELEASED
*/
static inline gboolean
glnx_fstatat (int dfd,
const gchar *path,
struct stat *buf,
int flags,
GError **error)
{
if (TEMP_FAILURE_RETRY (fstatat (dfd, path, buf, flags)) != 0)
return glnx_throw_errno (error);
return TRUE;
}
G_END_DECLS
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