/*
- * udev-node.c - device node handling
- *
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
- * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2004-2006 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
*
* 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.
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/* preserve node with already correct numbers, to prevent changing the inode number */
if ((stats.st_mode & S_IFMT) == (mode & S_IFMT) && (stats.st_rdev == devt)) {
info("preserve file '%s', because it has correct dev_t", file);
- selinux_setfilecon(file, udev->dev->kernel_name, stats.st_mode);
+ selinux_setfilecon(file, udev->dev->kernel, stats.st_mode);
goto perms;
}
dbg("already present file '%s' unlinked", file);
create:
- selinux_setfscreatecon(file, udev->dev->kernel_name, mode);
+ selinux_setfscreatecon(file, udev->dev->kernel, mode);
retval = mknod(file, mode, devt);
selinux_resetfscreatecon();
if (retval != 0) {
return retval;
}
+static int udev_node_symlink(struct udevice *udev, const char *linktarget, const char *filename)
+{
+ char target[PATH_SIZE];
+ int len;
+
+ /* look if symlink already exists */
+ len = readlink(filename, target, sizeof(target));
+ if (len > 0) {
+ target[len] = '\0';
+ if (strcmp(linktarget, target) == 0) {
+ info("preserving symlink '%s' to '%s'", filename, linktarget);
+ selinux_setfilecon(filename, NULL, S_IFLNK);
+ goto exit;
+ } else {
+ info("link '%s' points to different target '%s', delete it", filename, target);
+ unlink(filename);
+ }
+ }
+
+ /* create link */
+ info("creating symlink '%s' to '%s'", filename, linktarget);
+ selinux_setfscreatecon(filename, NULL, S_IFLNK);
+ if (symlink(linktarget, filename) != 0)
+ err("symlink(%s, %s) failed: %s", linktarget, filename, strerror(errno));
+ selinux_resetfscreatecon();
+
+exit:
+ return 0;
+}
+
int udev_node_add(struct udevice *udev, struct udevice *udev_old)
{
char filename[PATH_SIZE];
int i;
int retval = 0;
- selinux_init();
-
snprintf(filename, sizeof(filename), "%s/%s", udev_root, udev->name);
filename[sizeof(filename)-1] = '\0';
strlcat(linktarget, &udev->name[tail], sizeof(linktarget));
info("creating symlink '%s' to '%s'", filename, linktarget);
- if (!udev->test_run) {
- unlink(filename);
- selinux_setfscreatecon(filename, NULL, S_IFLNK);
- if (symlink(linktarget, filename) != 0)
- err("symlink(%s, %s) failed: %s", linktarget, filename, strerror(errno));
- selinux_resetfscreatecon();
- }
+ if (!udev->test_run)
+ udev_node_symlink(udev, linktarget, filename);
strlcat(symlinks, filename, sizeof(symlinks));
strlcat(symlinks, " ", sizeof(symlinks));
}
info("removing symlink '%s'", filename);
- unlink(filename);
+ if (!udev->test_run) {
+ unlink(filename);
- if (strchr(filename, '/'))
- delete_path(filename);
+ if (strchr(filename, '/'))
+ delete_path(filename);
+ }
strlcat(symlinks, filename, sizeof(symlinks));
strlcat(symlinks, " ", sizeof(symlinks));