[PATCH] added libsysfs code from sysutils-0.1.1-071803 release

1 files changed, 89 insertions, 0 deletions

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;
+}