From 070f54223f66490e9d25719c495e074f77da8985 Mon Sep 17 00:00:00 2001 From: "greg@kroah.com" Date: Fri, 18 Jul 2003 20:08:00 -0700 Subject: [PATCH] added libsysfs code from sysutils-0.1.1-071803 release --- libsysfs/sysfs_driver.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 libsysfs/sysfs_driver.c (limited to 'libsysfs/sysfs_driver.c') diff --git a/libsysfs/sysfs_driver.c b/libsysfs/sysfs_driver.c new file mode 100644 index 0000000000..6813c85f14 --- /dev/null +++ b/libsysfs/sysfs_driver.c @@ -0,0 +1,89 @@ +/* + * sysfs_driver.c + * + * Driver utility functions for libsysfs + * + * Copyright (C) 2003 International Business Machines, Inc. + * + * 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 2.1 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 + * + */ +#include "libsysfs.h" +#include "sysfs.h" + +/** + * sysfs_close_driver: closes and cleans up driver structure + * @driver: driver to close + */ +void sysfs_close_driver(struct sysfs_driver *driver) +{ + if (driver != NULL) { + if (driver->directory != NULL) + sysfs_close_directory(driver->directory); + free(driver); + } +} + +/** + * alloc_driver: allocates and initializes driver + * returns struct sysfs_driver with success and NULL with error. + */ +static struct sysfs_driver *alloc_driver(void) +{ + return (struct sysfs_driver *)calloc(1, sizeof(struct sysfs_driver)); +} + +/** + * sysfs_open_driver: opens and initializes driver structure + * @path: path to driver directory + * returns struct sysfs_driver with success and NULL with error + */ +struct sysfs_driver *sysfs_open_driver(const char *path) +{ + struct sysfs_driver *driver = NULL; + struct sysfs_directory *sdir = NULL; + char devname[SYSFS_NAME_LEN]; + + if (path == NULL) { + errno = EINVAL; + return NULL; + } + sdir = sysfs_open_directory(path); + if (sdir == NULL) { + dprintf (stderr, "Error opening directory %s\n", path); + return NULL; + } + if ((sysfs_read_directory(sdir)) != 0) { + dprintf (stderr, "Error reading directory %s\n", path); + sysfs_close_directory(sdir); + return NULL; + } + driver = alloc_driver(); + if (driver == NULL) { + dprintf(stderr, "Error allocating driver at %s\n", path); + sysfs_close_directory(sdir); + return NULL; + } + if ((sysfs_get_name_from_path(path, devname, SYSFS_NAME_LEN)) != 0) { + dprintf (stderr, "Error reading directory %s\n", path); + sysfs_close_directory(sdir); + free(driver); + return NULL; + } + strncpy(driver->name, devname, sizeof(driver->name)); + driver->directory = sdir; + + return driver; +} -- cgit v1.2.3-54-g00ecf