diff options
| -rw-r--r-- | src/Makefile.am | 2 | ||||
| -rw-r--r-- | src/kerneldevice/mm-kernel-device-helpers.c | 62 | ||||
| -rw-r--r-- | src/kerneldevice/mm-kernel-device-helpers.h | 26 |
3 files changed, 90 insertions, 0 deletions
diff --git a/src/Makefile.am b/src/Makefile.am index 24ef8bb8..120503e1 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -149,6 +149,8 @@ libkerneldevice_la_CPPFLAGS = \ libkerneldevice_la_SOURCES = \ kerneldevice/mm-kernel-device.h \ kerneldevice/mm-kernel-device.c \ + kerneldevice/mm-kernel-device-helpers.h \ + kerneldevice/mm-kernel-device-helpers.c \ kerneldevice/mm-kernel-device-generic.h \ kerneldevice/mm-kernel-device-generic.c \ kerneldevice/mm-kernel-device-generic-rules.h \ diff --git a/src/kerneldevice/mm-kernel-device-helpers.c b/src/kerneldevice/mm-kernel-device-helpers.c new file mode 100644 index 00000000..d9bcfd97 --- /dev/null +++ b/src/kerneldevice/mm-kernel-device-helpers.c @@ -0,0 +1,62 @@ +/* -*- 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; + g_autofree gchar *basename = 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; +} diff --git a/src/kerneldevice/mm-kernel-device-helpers.h b/src/kerneldevice/mm-kernel-device-helpers.h new file mode 100644 index 00000000..48a86233 --- /dev/null +++ b/src/kerneldevice/mm-kernel-device-helpers.h @@ -0,0 +1,26 @@ +/* -*- 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> + */ + +#ifndef MM_KERNEL_DEVICE_HELPERS_H +#define MM_KERNEL_DEVICE_HELPERS_H + +#include <glib.h> + +/* For virtual devices that keep a "lower" link to the parent physical device + * they're based on, get the name of that parent physical device. + * (e.g. lower_device_name(qmimux0) == wwan0) */ +gchar *mm_kernel_device_get_lower_device_name (const gchar *sysfs_path); + +#endif /* MM_KERNEL_DEVICE_HERLPERS_H */ |