[PATCH] rename udevdb* to udev_db*

1 files changed, 214 insertions, 0 deletions

diff --git a/udev_db.c b/udev_db.c
new file mode 100644
index 0000000000..f2a890ea42
--- /dev/null
+++ b/udev_db.c
@@ -0,0 +1,214 @@
+/*
+ * udev_db.c
+ *
+ * Userspace devfs
+ *
+ * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2004 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.,
+ *	675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stddef.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+#include <dirent.h>
+
+#include "libsysfs/sysfs/libsysfs.h"
+#include "udev.h"
+#include "udev_lib.h"
+#include "logging.h"
+#include "udev_db.h"
+
+#define PATH_TO_NAME_CHAR		'@'
+
+static int get_db_filename(struct udevice *udev, char *filename, int len)
+{
+	char devpath[SYSFS_PATH_MAX];
+	char *pos;
+
+	/* replace '/' to transform path into a filename */
+	strfieldcpy(devpath, udev->devpath);
+	pos = strchr(&devpath[1], '/');
+	while (pos) {
+		pos[0] = PATH_TO_NAME_CHAR;
+		pos = strchr(&pos[1], '/');
+	}
+	snprintf(filename, len, "%s%s", udev_db_path, devpath);
+	filename[len-1] = '\0';
+
+	return 0;
+}
+
+int udev_db_add_device(struct udevice *udev)
+{
+	char filename[SYSFS_PATH_MAX];
+	FILE *f;
+
+	if (udev->test_run)
+		return 0;
+
+	get_db_filename(udev, filename, SYSFS_PATH_MAX);
+
+	create_path(filename);
+
+	f = fopen(filename, "w");
+	if (f == NULL) {
+		dbg("unable to create db file '%s'", filename);
+		return -1;
+	}
+	dbg("storing data for device '%s' in '%s'", udev->devpath, filename);
+
+	fprintf(f, "P:%s\n", udev->devpath);
+	fprintf(f, "N:%s\n", udev->name);
+	fprintf(f, "S:%s\n", udev->symlink);
+	fprintf(f, "A:%d\n", udev->partitions);
+
+	fclose(f);
+
+	return 0;
+}
+
+static int parse_db_file(struct udevice *udev, const char *filename)
+{
+	char line[NAME_SIZE];
+	char *bufline;
+	char *buf;
+	size_t bufsize;
+	size_t cur;
+	size_t count;
+
+	if (file_map(filename, &buf, &bufsize) != 0) {
+		dbg("unable to read db file '%s'", filename);
+		return -1;
+	}
+
+	cur = 0;
+	while (cur < bufsize) {
+		count = buf_get_line(buf, bufsize, cur);
+		bufline = &buf[cur];
+		cur += count+1;
+
+		switch(bufline[0]) {
+		case 'P':
+			if (count > DEVPATH_SIZE)
+				count = DEVPATH_SIZE-1;
+			strncpy(udev->devpath, &bufline[2], count-2);
+			break;
+		case 'N':
+			if (count > NAME_SIZE)
+				count = NAME_SIZE-1;
+			strncpy(udev->name, &bufline[2], count-2);
+			break;
+		case 'S':
+			if (count > NAME_SIZE)
+				count = NAME_SIZE-1;
+			strncpy(udev->symlink, &bufline[2], count-2);
+			break;
+		case 'A':
+			strfieldcpy(line, &bufline[2]);
+			udev->partitions = atoi(line);
+			break;
+		}
+	}
+
+	if (udev->name[0] == '\0')
+		return -1;
+
+	return 0;
+}
+
+int udev_db_get_device(struct udevice *udev)
+{
+	char filename[SYSFS_PATH_MAX];
+
+	get_db_filename(udev, filename, SYSFS_PATH_MAX);
+
+	return parse_db_file(udev, filename);
+}
+
+int udev_db_delete_device(struct udevice *udev)
+{
+	char filename[SYSFS_PATH_MAX];
+
+	get_db_filename(udev, filename, SYSFS_PATH_MAX);
+	unlink(filename);
+
+	return 0;
+}
+
+int udev_db_get_device_byname(struct udevice *udev, const char *name)
+{
+	struct dirent *ent;
+	DIR *dir;
+	char filename[NAME_SIZE];
+	struct udevice db_udev;
+
+	dir = opendir(udev_db_path);
+	if (dir == NULL) {
+		dbg("unable to udev db '%s'", udev_db_path);
+		return -1;
+	}
+
+	while (1) {
+		ent = readdir(dir);
+		if (ent == NULL || ent->d_name[0] == '\0')
+			break;
+
+		if (ent->d_name[0] == '.')
+			continue;
+
+		snprintf(filename, NAME_SIZE, "%s/%s", udev_db_path, ent->d_name);
+		filename[NAME_SIZE-1] = '\0';
+
+		memset(&db_udev, 0x00, sizeof(struct udevice));
+		if (parse_db_file(&db_udev, filename) == 0) {
+			char *pos;
+			int len;
+
+			if (strncmp(name, db_udev.name, NAME_SIZE) == 0) {
+				goto found;
+			}
+
+			foreach_strpart(db_udev.symlink, " ", pos, len) {
+				if (strncmp(name, pos, len) != 0)
+					continue;
+
+				if (len == strlen(name))
+					goto found;
+			}
+
+		}
+	}
+
+	closedir(dir);
+
+	return -1;
+
+found:
+	closedir(dir);
+
+	strfieldcpy(udev->devpath, db_udev.devpath);
+	strfieldcpy(udev->name, db_udev.name);
+	strfieldcpy(udev->symlink, db_udev.symlink);
+	udev->partitions = db_udev.partitions;
+
+	return 0;
+}