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/*
* 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];
int retval;
strncpy(filename, udev_root, sizeof(filename));
strncat(filename, name, sizeof(filename));
dbg("unlinking %s", filename);
retval = unlink(filename);
if (retval) {
dbg("unlink(%s) failed with error '%s'",
filename, strerror(errno));
return retval;
}
/* remove subdirectories */
if (strchr(name, '/')) {
char *pos;
pos = strrchr(filename, '/');
while (1) {
*pos = 0x00;
pos = strrchr(filename, '/');
/* don't remove the last one */
if ((pos == filename) || (pos == NULL))
break;
/* remove if empty */
retval = rmdir(filename);
if (retval) {
if (errno == ENOTEMPTY)
return 0;
dbg("rmdir(%s) failed with error '%s'",
filename, strerror(errno));
break;
}
dbg("removed %s", filename);
}
}
return retval;
}
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;
}
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