/* * udev-remove.c * * Userspace devfs * * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com> * * * 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 <string.h> #include <stdio.h> #include <fcntl.h> #include <unistd.h> #include <errno.h> #include "udev.h" #include "udev_version.h" #include "namedev.h" #include "udevdb.h" #include "libsysfs/libsysfs.h" /* * Look up the sysfs path in the database to see if we have named this device * something different from the kernel name. If we have, us it. If not, use * the default kernel name for lack of anything else to know to do. */ static char *get_name(char *path, int major, int minor) { static char name[100]; struct udevice *dev; char *temp; dev = udevdb_get_dev(path); if (dev != NULL) { strcpy(name, dev->name); goto exit; } dbg("%s not found in database, falling back on default name", path); temp = strrchr(path, '/'); if (temp == NULL) return NULL; strncpy(name, &temp[1], sizeof(name)); exit: dbg("name is %s", name); return &name[0]; } /* * We also want to clean up any symlinks that were created in create_node() */ static int delete_node(char *name) { char filename[255]; strncpy(filename, UDEV_ROOT, sizeof(filename)); strncat(filename, name, sizeof(filename)); dbg("unlinking %s", filename); return unlink(filename); } int udev_remove_device(char *device, char *subsystem) { char *name; int retval = 0; name = get_name(device, 0, 0); if (name == NULL) { dbg ("get_name failed"); retval = -ENODEV; goto exit; } udevdb_delete_dev(device); return delete_node(name); exit: return retval; }