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/*
* Copyright (C) 2011 Colin Walters <walters@verbum.org>
*
* SPDX-License-Identifier: LGPL-2.0+
*
* 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, see <https://www.gnu.org/licenses/>.
*
* Author: Colin Walters <walters@verbum.org>
*/
#include "config.h"
#include <gio/gio.h>
#include <gio/gunixinputstream.h>
#include <gio/gunixoutputstream.h>
#include <gio/gfiledescriptorbased.h>
#include <string.h>
#include "otutil.h"
#ifndef O_BINARY
#define O_BINARY 0
#endif
GFile *
ot_gfile_resolve_path_printf (GFile *path,
const char *format,
...)
{
va_list args;
g_autofree char *relpath = NULL;
va_start (args, format);
relpath = g_strdup_vprintf (format, args);
va_end (args);
return g_file_resolve_relative_path (path, relpath);
}
/**
* ot_gfile_replace_contents_fsync:
*
* Like g_file_replace_contents(), except always uses fdatasync().
*/
gboolean
ot_gfile_replace_contents_fsync (GFile *path,
GBytes *contents,
GCancellable *cancellable,
GError **error)
{
gsize len;
const guint8*buf = g_bytes_get_data (contents, &len);
return glnx_file_replace_contents_at (AT_FDCWD, gs_file_get_path_cached (path),
buf, len,
GLNX_FILE_REPLACE_DATASYNC_NEW,
cancellable, error);
}
/**
* ot_gfile_ensure_unlinked:
*
* Like gs_file_unlink(), but return successfully if the file doesn't
* exist.
*/
gboolean
ot_gfile_ensure_unlinked (GFile *path,
GCancellable *cancellable,
GError **error)
{
g_assert (path);
const char *pathc = gs_file_get_path_cached (path);
g_assert (pathc);
if (unlink (pathc) != 0)
{
if (errno != ENOENT)
return glnx_throw_errno_prefix (error, "unlink(%s)", pathc);
}
return TRUE;
}
#if !GLIB_CHECK_VERSION(2, 44, 0)
gboolean
ot_file_enumerator_iterate (GFileEnumerator *direnum,
GFileInfo **out_info,
GFile **out_child,
GCancellable *cancellable,
GError **error)
{
gboolean ret = FALSE;
GError *temp_error = NULL;
static GQuark cached_info_quark;
static GQuark cached_child_quark;
static gsize quarks_initialized;
g_return_val_if_fail (direnum != NULL, FALSE);
g_return_val_if_fail (out_info != NULL, FALSE);
if (g_once_init_enter (&quarks_initialized))
{
cached_info_quark = g_quark_from_static_string ("ot-cached-info");
cached_child_quark = g_quark_from_static_string ("ot-cached-child");
g_once_init_leave (&quarks_initialized, 1);
}
*out_info = g_file_enumerator_next_file (direnum, cancellable, &temp_error);
if (out_child)
*out_child = NULL;
if (temp_error != NULL)
{
g_propagate_error (error, temp_error);
goto out;
}
else if (*out_info != NULL)
{
g_object_set_qdata_full ((GObject*)direnum, cached_info_quark, *out_info, (GDestroyNotify)g_object_unref);
if (out_child != NULL)
{
const char *name = g_file_info_get_name (*out_info);
*out_child = g_file_get_child (g_file_enumerator_get_container (direnum), name);
g_object_set_qdata_full ((GObject*)direnum, cached_child_quark, *out_child, (GDestroyNotify)g_object_unref);
}
}
ret = TRUE;
out:
return ret;
}
#endif
G_LOCK_DEFINE_STATIC (pathname_cache);
/**
* ot_file_get_path_cached:
*
* Like g_file_get_path(), but returns a constant copy so callers
* don't need to free the result.
*/
const char *
ot_file_get_path_cached (GFile *file)
{
const char *path;
static GQuark _file_path_quark = 0;
if (G_UNLIKELY (_file_path_quark) == 0)
_file_path_quark = g_quark_from_static_string ("gsystem-file-path");
G_LOCK (pathname_cache);
path = g_object_get_qdata ((GObject*)file, _file_path_quark);
if (!path)
{
path = g_file_get_path (file);
if (path == NULL)
{
G_UNLOCK (pathname_cache);
return NULL;
}
g_object_set_qdata_full ((GObject*)file, _file_path_quark, (char*)path, (GDestroyNotify)g_free);
}
G_UNLOCK (pathname_cache);
return path;
}
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