delete all Makefiles and move udev source to udev/

1 files changed, 331 insertions, 0 deletions

diff --git a/udev/udev_db.c b/udev/udev_db.c
new file mode 100644
index 0000000000..3348c9a02c
--- /dev/null
+++ b/udev/udev_db.c
@@ -0,0 +1,331 @@
+/*
+ * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	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 version 2 of the License.
+ * 
+ *	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.
+ * 
+ *	You should have received a copy of the GNU General Public License along
+ *	with this program; if not, write to the Free Software Foundation, Inc.,
+ *	51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "udev.h"
+#include "udev_selinux.h"
+
+
+static size_t devpath_to_db_path(const char *devpath, char *filename, size_t len)
+{
+	size_t start;
+
+	/* translate to location of db file */
+	strlcpy(filename, udev_root, len);
+	start = strlcat(filename, "/"DB_DIR"/", len);
+	strlcat(filename, devpath, len);
+	return path_encode(&filename[start], len - start);
+}
+
+/* reverse mapping from the device file name to the devpath */
+static int name_index(const char *devpath, const char *name, int add)
+{
+	char device[PATH_SIZE];
+	char filename[PATH_SIZE * 2];
+	size_t start;
+	int fd;
+
+	/* directory with device name */
+	strlcpy(filename, udev_root, sizeof(filename));
+	start = strlcat(filename, "/"DB_NAME_INDEX_DIR"/", sizeof(filename));
+	strlcat(filename, name, sizeof(filename));
+	path_encode(&filename[start], sizeof(filename) - start);
+	/* entry with the devpath */
+	strlcpy(device, devpath, sizeof(device));
+	path_encode(device, sizeof(device));
+	strlcat(filename, "/", sizeof(filename));
+	strlcat(filename, device, sizeof(filename));
+
+	if (add) {
+		info("creating index: '%s'\n", filename);
+		create_path(filename);
+		fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);
+		if (fd > 0)
+			close(fd);
+	} else {
+		info("removing index: '%s'\n", filename);
+		unlink(filename);
+		delete_path(filename);
+	}
+	return 0;
+}
+
+int udev_db_get_devices_by_name(const char *name, struct list_head *name_list)
+{
+	char dirname[PATH_MAX];
+	size_t start;
+	DIR *dir;
+	int rc = 0;
+
+	strlcpy(dirname, udev_root, sizeof(dirname));
+	start = strlcat(dirname, "/"DB_NAME_INDEX_DIR"/", sizeof(dirname));
+	strlcat(dirname, name, sizeof(dirname));
+	path_encode(&dirname[start], sizeof(dirname) - start);
+
+	dir = opendir(dirname);
+	if (dir == NULL) {
+		info("no index directory '%s': %s\n", dirname, strerror(errno));
+		rc = -1;
+		goto out;
+	}
+
+	info("found index directory '%s'\n", dirname);
+	while (1) {
+		struct dirent *ent;
+		char device[PATH_SIZE];
+
+		ent = readdir(dir);
+		if (ent == NULL || ent->d_name[0] == '\0')
+			break;
+		if (ent->d_name[0] == '.')
+			continue;
+
+		strlcpy(device, ent->d_name, sizeof(device));
+		path_decode(device);
+		name_list_add(name_list, device, 0);
+		rc++;
+	}
+	closedir(dir);
+out:
+	return rc;
+}
+
+int udev_db_rename(const char *devpath_old, const char *devpath)
+{
+	char filename[PATH_SIZE];
+	char filename_old[PATH_SIZE];
+
+	devpath_to_db_path(devpath_old, filename_old, sizeof(filename_old));
+	devpath_to_db_path(devpath, filename, sizeof(filename));
+	return rename(filename_old, filename);
+}
+
+int udev_db_add_device(struct udevice *udev)
+{
+	char filename[PATH_SIZE];
+
+	if (udev->test_run)
+		return 0;
+
+	devpath_to_db_path(udev->dev->devpath, filename, sizeof(filename));
+	create_path(filename);
+	unlink(filename);
+
+	/*
+	 * don't waste tmpfs memory pages, if we don't have any data to store
+	 * create fake db-file; store the node-name in a symlink target
+	 */
+	if (list_empty(&udev->symlink_list) && list_empty(&udev->env_list) &&
+	    !udev->partitions && !udev->ignore_remove) {
+		int ret;
+		dbg("nothing interesting to store, create symlink\n");
+		selinux_setfscreatecon(filename, NULL, S_IFLNK);	
+		ret = symlink(udev->name, filename);
+		selinux_resetfscreatecon();
+		if (ret != 0) {
+			err("unable to create db link '%s': %s\n", filename, strerror(errno));
+			return -1;
+		}
+	} else {
+		FILE *f;
+		struct name_entry *name_loop;
+
+		f = fopen(filename, "w");
+		if (f == NULL) {
+			err("unable to create db file '%s': %s\n", filename, strerror(errno));
+			return -1;
+		}
+		dbg("storing data for device '%s' in '%s'\n", udev->dev->devpath, filename);
+
+		fprintf(f, "N:%s\n", udev->name);
+		list_for_each_entry(name_loop, &udev->symlink_list, node) {
+			fprintf(f, "S:%s\n", name_loop->name);
+			/* add symlink-name to index */
+			name_index(udev->dev->devpath, name_loop->name, 1);
+		}
+		fprintf(f, "M:%u:%u\n", major(udev->devt), minor(udev->devt));
+		if (udev->link_priority != 0)
+			fprintf(f, "L:%u\n", udev->link_priority);
+		if (udev->event_timeout >= 0)
+			fprintf(f, "T:%u\n", udev->event_timeout);
+		if (udev->partitions != 0)
+			fprintf(f, "A:%u\n", udev->partitions);
+		if (udev->ignore_remove)
+			fprintf(f, "R:%u\n", udev->ignore_remove);
+		list_for_each_entry(name_loop, &udev->env_list, node)
+			fprintf(f, "E:%s\n", name_loop->name);
+		fclose(f);
+	}
+
+	/* add name to index */
+	name_index(udev->dev->devpath, udev->name, 1);
+
+	return 0;
+}
+
+int udev_db_get_device(struct udevice *udev, const char *devpath)
+{
+	struct stat stats;
+	char filename[PATH_SIZE];
+	char line[PATH_SIZE];
+	unsigned int maj, min;
+	char *bufline;
+	char *buf;
+	size_t bufsize;
+	size_t cur;
+	size_t count;
+
+	sysfs_device_set_values(udev->dev, devpath, NULL, NULL);
+	devpath_to_db_path(devpath, filename, sizeof(filename));
+
+	if (lstat(filename, &stats) != 0) {
+		info("no db file to read %s: %s\n", filename, strerror(errno));
+		return -1;
+	}
+	if ((stats.st_mode & S_IFMT) == S_IFLNK) {
+		char target[NAME_SIZE];
+		int target_len;
+
+		info("found a symlink as db file\n");
+		target_len = readlink(filename, target, sizeof(target));
+		if (target_len > 0)
+			target[target_len] = '\0';
+		else {
+			info("error reading db link %s: %s\n", filename, strerror(errno));
+			return -1;
+		}
+		dbg("db link points to '%s'\n", target);
+		strlcpy(udev->name, target, sizeof(udev->name));
+		return 0;
+	}
+
+	if (file_map(filename, &buf, &bufsize) != 0) {
+		info("error reading db file %s: %s\n", filename, strerror(errno));
+		return -1;
+	}
+
+	cur = 0;
+	while (cur < bufsize) {
+		count = buf_get_line(buf, bufsize, cur);
+		bufline = &buf[cur];
+		cur += count+1;
+
+		if (count > sizeof(line))
+			count = sizeof(line);
+		memcpy(line, &bufline[2], count-2);
+		line[count-2] = '\0';
+
+		switch(bufline[0]) {
+		case 'N':
+			strlcpy(udev->name, line, sizeof(udev->name));
+			break;
+		case 'M':
+			sscanf(line, "%u:%u", &maj, &min);
+			udev->devt = makedev(maj, min);
+			break;
+		case 'S':
+			name_list_add(&udev->symlink_list, line, 0);
+			break;
+		case 'L':
+			udev->link_priority = atoi(line);
+			break;
+		case 'T':
+			udev->event_timeout = atoi(line);
+			break;
+		case 'A':
+			udev->partitions = atoi(line);
+			break;
+		case 'R':
+			udev->ignore_remove = atoi(line);
+			break;
+		case 'E':
+			name_list_add(&udev->env_list, line, 0);
+			break;
+		}
+	}
+	file_unmap(buf, bufsize);
+
+	if (udev->name[0] == '\0')
+		return -1;
+
+	return 0;
+}
+
+int udev_db_delete_device(struct udevice *udev)
+{
+	char filename[PATH_SIZE];
+	struct name_entry *name_loop;
+
+	if (udev->test_run)
+		return 0;
+
+	devpath_to_db_path(udev->dev->devpath, filename, sizeof(filename));
+	unlink(filename);
+
+	name_index(udev->dev->devpath, udev->name, 0);
+	list_for_each_entry(name_loop, &udev->symlink_list, node)
+		name_index(udev->dev->devpath, name_loop->name, 0);
+
+	return 0;
+}
+
+int udev_db_get_all_entries(struct list_head *name_list)
+{
+	char dbpath[PATH_MAX];
+	DIR *dir;
+
+	strlcpy(dbpath, udev_root, sizeof(dbpath));
+	strlcat(dbpath, "/"DB_DIR, sizeof(dbpath));
+	dir = opendir(dbpath);
+	if (dir == NULL) {
+		info("no udev_db available '%s': %s\n", dbpath, strerror(errno));
+		return -1;
+	}
+
+	while (1) {
+		struct dirent *ent;
+		char device[PATH_SIZE];
+
+		ent = readdir(dir);
+		if (ent == NULL || ent->d_name[0] == '\0')
+			break;
+		if (ent->d_name[0] == '.')
+			continue;
+
+		strlcpy(device, ent->d_name, sizeof(device));
+		path_decode(device);
+		name_list_add(name_list, device, 1);
+		dbg("added '%s'\n", device);
+	}
+
+	closedir(dir);
+	return 0;
+}