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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 0213 9 , 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"
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# include "udevdb.h"
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# include "libsysfs/libsysfs.h"
/*
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* 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 .
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*/
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static char * get_name ( char * path , int major , int minor )
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{
static char name [ 100 ] ;
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struct udevice * dev ;
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char * temp ;
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dev = udevdb_get_dev ( path ) ;
if ( dev ! = NULL ) {
strcpy ( name , dev - > name ) ;
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goto exit ;
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}
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dbg ( " %s not found in database, falling back on default name " , path ) ;
temp = strrchr ( path , ' / ' ) ;
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if ( temp = = NULL )
return NULL ;
strncpy ( name , & temp [ 1 ] , sizeof ( name ) ) ;
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exit :
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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 ;
}
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udevdb_delete_dev ( device ) ;
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return delete_node ( name ) ;
exit :
return retval ;
}