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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* 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 2 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:
*
* Copyright (C) 2021 Aleksander Morgado <aleksander@aleksander.es>
*/
#include <stdlib.h>
#include <glib.h>
#include <glib-object.h>
#include <gio/gio.h>
#include "mm-kernel-device-helpers.h"
gchar *
mm_kernel_device_get_lower_device_name (const gchar *sysfs_path)
{
g_autoptr(GFile) dirfile = NULL;
g_autoptr(GFileEnumerator) direnum = NULL;
dirfile = g_file_new_for_path (sysfs_path);
direnum = g_file_enumerate_children (dirfile,
G_FILE_ATTRIBUTE_STANDARD_NAME,
G_FILE_QUERY_INFO_NONE,
NULL,
NULL);
if (!direnum)
return NULL;
while (TRUE) {
GFileInfo *info;
g_autofree gchar *filename = NULL;
g_autofree gchar *link_path = NULL;
g_autofree gchar *real_path = NULL;
if (!g_file_enumerator_iterate (direnum, &info, NULL, NULL, NULL) || !info)
break;
filename = g_file_info_get_attribute_as_string (info, G_FILE_ATTRIBUTE_STANDARD_NAME);
if (!filename || !g_str_has_prefix (filename, "lower_"))
continue;
link_path = g_strdup_printf ("%s/%s", sysfs_path, filename);
real_path = realpath (link_path, NULL);
if (!real_path)
continue;
return g_path_get_basename (real_path);
}
return NULL;
}
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