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/*
* namedev_parse . 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 .
*
*/
/* define this to enable parsing debugging */
/* #define DEBUG_PARSER */
# include <stddef.h>
# include <stdlib.h>
# include <string.h>
# include <stdio.h>
# include <fcntl.h>
# include <ctype.h>
# include <unistd.h>
# include <errno.h>
# include "udev.h"
# include "namedev.h"
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static int add_config_dev ( struct config_device * new_dev )
{
struct config_device * tmp_dev ;
tmp_dev = malloc ( sizeof ( * tmp_dev ) ) ;
if ( tmp_dev = = NULL )
return - ENOMEM ;
memcpy ( tmp_dev , new_dev , sizeof ( * tmp_dev ) ) ;
list_add_tail ( & tmp_dev - > node , & config_device_list ) ;
//dump_config_dev(tmp_dev);
return 0 ;
}
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int get_pair ( char * * orig_string , char * * left , char * * right )
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{
char * temp ;
char * string = * orig_string ;
if ( ! string )
return - ENODEV ;
/* eat any whitespace */
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while ( isspace ( * string ) | | * string = = ' , ' )
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+ + string ;
/* split based on '=' */
temp = strsep ( & string , " = " ) ;
* left = temp ;
if ( ! string )
return - ENODEV ;
/* take the right side and strip off the '"' */
while ( isspace ( * string ) )
+ + string ;
if ( * string = = ' " ' )
+ + string ;
else
return - ENODEV ;
temp = strsep ( & string , " \" " ) ;
if ( ! string | | * temp = = ' \0 ' )
return - ENODEV ;
* right = temp ;
* orig_string = string ;
return 0 ;
}
void dump_config_dev ( struct config_device * dev )
{
switch ( dev - > type ) {
case KERNEL_NAME :
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dbg_parse ( " KERNEL name='%s' " , dev - > name ) ;
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break ;
case LABEL :
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dbg_parse ( " LABEL name='%s', bus='%s', sysfs_file[0]='%s', sysfs_value[0]='%s' " ,
dev - > name , dev - > bus , dev - > sysfs_pair [ 0 ] . file , dev - > sysfs_pair [ 0 ] . value ) ;
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break ;
case NUMBER :
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dbg_parse ( " NUMBER name='%s', bus='%s', id='%s' " ,
dev - > name , dev - > bus , dev - > id ) ;
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break ;
case TOPOLOGY :
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dbg_parse ( " TOPOLOGY name='%s', bus='%s', place='%s' " ,
dev - > name , dev - > bus , dev - > place ) ;
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break ;
case REPLACE :
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dbg_parse ( " REPLACE name='%s', kernel_name='%s' " ,
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dev - > name , dev - > kernel_name ) ;
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break ;
case CALLOUT :
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dbg_parse ( " CALLOUT name='%s', bus='%s', program='%s', id='%s' " ,
dev - > name , dev - > bus , dev - > exec_program , dev - > id ) ;
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break ;
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case IGNORE :
dbg_parse ( " IGNORE name='%s', kernel_name='%s' " ,
dev - > name , dev - > kernel_name ) ;
break ;
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default :
dbg_parse ( " unknown type of method " ) ;
}
}
void dump_config_dev_list ( void )
{
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struct config_device * dev ;
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list_for_each_entry ( dev , & config_device_list , node )
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dump_config_dev ( dev ) ;
}
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void dump_perm_dev ( struct perm_device * dev )
{
dbg_parse ( " name='%s', owner='%s', group='%s', mode=%#o " ,
dev - > name , dev - > owner , dev - > group , dev - > mode ) ;
}
void dump_perm_dev_list ( void )
{
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struct perm_device * dev ;
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list_for_each_entry ( dev , & perm_device_list , node )
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dump_perm_dev ( dev ) ;
}
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int namedev_init_rules ( void )
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{
char line [ 255 ] ;
int lineno ;
char * temp ;
char * temp2 ;
char * temp3 ;
FILE * fd ;
int retval = 0 ;
struct config_device dev ;
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fd = fopen ( udev_rules_filename , " r " ) ;
if ( fd ! = NULL ) {
dbg ( " reading '%s' as rules file " , udev_rules_filename ) ;
} else {
dbg ( " can't open '%s' as a rules file " , udev_rules_filename ) ;
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return - ENODEV ;
}
/* loop through the whole file */
lineno = 0 ;
while ( 1 ) {
/* get a line */
temp = fgets ( line , sizeof ( line ) , fd ) ;
if ( temp = = NULL )
goto exit ;
lineno + + ;
dbg_parse ( " read '%s' " , temp ) ;
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/* eat the whitespace */
while ( isspace ( * temp ) )
+ + temp ;
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/* empty line? */
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if ( ( * temp = = ' \0 ' ) | | ( * temp = = ' \n ' ) )
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continue ;
/* see if this is a comment */
if ( * temp = = COMMENT_CHARACTER )
continue ;
memset ( & dev , 0x00 , sizeof ( struct config_device ) ) ;
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/* get the method */
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temp2 = strsep ( & temp , " , " ) ;
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if ( strcasecmp ( temp2 , TYPE_LABEL ) = = 0 ) {
dev . type = LABEL ;
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goto keys ;
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}
if ( strcasecmp ( temp2 , TYPE_NUMBER ) = = 0 ) {
dev . type = NUMBER ;
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goto keys ;
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}
if ( strcasecmp ( temp2 , TYPE_TOPOLOGY ) = = 0 ) {
dev . type = TOPOLOGY ;
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goto keys ;
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}
if ( strcasecmp ( temp2 , TYPE_REPLACE ) = = 0 ) {
dev . type = REPLACE ;
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goto keys ;
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}
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if ( strcasecmp ( temp2 , TYPE_CALLOUT ) = = 0 ) {
dev . type = CALLOUT ;
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goto keys ;
}
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if ( strcasecmp ( temp2 , TYPE_IGNORE ) = = 0 ) {
dev . type = IGNORE ;
goto keys ;
}
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dbg_parse ( " unknown type of method '%s' " , temp2 ) ;
goto error ;
keys :
/* get all known keys */
while ( 1 ) {
retval = get_pair ( & temp , & temp2 , & temp3 ) ;
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if ( retval )
break ;
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if ( strcasecmp ( temp2 , FIELD_BUS ) = = 0 ) {
strfieldcpy ( dev . bus , temp3 ) ;
continue ;
}
if ( strcasecmp ( temp2 , FIELD_ID ) = = 0 ) {
strfieldcpy ( dev . id , temp3 ) ;
continue ;
}
if ( strcasecmp ( temp2 , FIELD_PLACE ) = = 0 ) {
strfieldcpy ( dev . place , temp3 ) ;
continue ;
}
if ( strncasecmp ( temp2 , FIELD_SYSFS , sizeof ( FIELD_SYSFS ) - 1 ) = = 0 ) {
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struct sysfs_pair * pair = & dev . sysfs_pair [ 0 ] ;
int sysfs_pair_num = 0 ;
/* find first unused pair */
while ( pair - > file [ 0 ] ! = ' \0 ' ) {
+ + sysfs_pair_num ;
if ( sysfs_pair_num > = MAX_SYSFS_PAIRS ) {
pair = NULL ;
break ;
}
+ + pair ;
}
if ( pair ) {
/* remove prepended 'SYSFS_' */
strfieldcpy ( pair - > file , temp2 + sizeof ( FIELD_SYSFS ) - 1 ) ;
strfieldcpy ( pair - > value , temp3 ) ;
}
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continue ;
}
if ( strcasecmp ( temp2 , FIELD_KERNEL ) = = 0 ) {
strfieldcpy ( dev . kernel_name , temp3 ) ;
continue ;
}
if ( strcasecmp ( temp2 , FIELD_PROGRAM ) = = 0 ) {
strfieldcpy ( dev . exec_program , temp3 ) ;
continue ;
}
if ( strcasecmp ( temp2 , FIELD_NAME ) = = 0 ) {
strfieldcpy ( dev . name , temp3 ) ;
continue ;
}
if ( strcasecmp ( temp2 , FIELD_SYMLINK ) = = 0 ) {
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strfieldcpy ( dev . symlink , temp3 ) ;
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continue ;
}
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dbg_parse ( " unknown type of field '%s' " , temp2 ) ;
}
/* check presence of keys according to method type */
switch ( dev . type ) {
case LABEL :
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dbg_parse ( TYPE_LABEL " name='%s', bus='%s', "
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" sysfs_file[0]='%s', sysfs_value[0]='%s', symlink='%s' " ,
dev . name , dev . bus , dev . sysfs_pair [ 0 ] . file ,
dev . sysfs_pair [ 0 ] . value , dev . symlink ) ;
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if ( ( * dev . name = = ' \0 ' ) | |
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( * dev . sysfs_pair [ 0 ] . file = = ' \0 ' ) | |
( * dev . sysfs_pair [ 0 ] . value = = ' \0 ' ) )
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goto error ;
break ;
case NUMBER :
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dbg_parse ( TYPE_NUMBER " name='%s', bus='%s', id='%s', symlink='%s' " ,
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dev . name , dev . bus , dev . id , dev . symlink ) ;
if ( ( * dev . name = = ' \0 ' ) | |
( * dev . bus = = ' \0 ' ) | |
( * dev . id = = ' \0 ' ) )
goto error ;
break ;
case TOPOLOGY :
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dbg_parse ( TYPE_TOPOLOGY " name='%s', bus='%s', "
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" place='%s', symlink='%s' " ,
dev . name , dev . bus , dev . place , dev . symlink ) ;
if ( ( * dev . name = = ' \0 ' ) | |
( * dev . bus = = ' \0 ' ) | |
( * dev . place = = ' \0 ' ) )
goto error ;
break ;
case REPLACE :
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dbg_parse ( TYPE_REPLACE " name='%s', kernel_name='%s', symlink='%s' " ,
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dev . name , dev . kernel_name , dev . symlink ) ;
if ( ( * dev . name = = ' \0 ' ) | |
( * dev . kernel_name = = ' \0 ' ) )
goto error ;
break ;
case CALLOUT :
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dbg_parse ( TYPE_CALLOUT " name='%s', bus='%s', program='%s', "
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" id='%s', symlink='%s' " ,
dev . name , dev . bus , dev . exec_program ,
dev . id , dev . symlink ) ;
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if ( ( * dev . name = = ' \0 ' ) | |
( * dev . id = = ' \0 ' ) | |
( * dev . exec_program = = ' \0 ' ) )
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goto error ;
break ;
case IGNORE :
dbg_parse ( TYPE_IGNORE " name='%s', kernel_name='%s' " ,
dev . name , dev . kernel_name ) ;
if ( ( * dev . kernel_name = = ' \0 ' ) )
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goto error ;
break ;
default :
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dbg_parse ( " unknown type of method " ) ;
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goto error ;
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}
retval = add_config_dev ( & dev ) ;
if ( retval ) {
dbg ( " add_config_dev returned with error %d " , retval ) ;
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continue ;
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}
}
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error :
dbg_parse ( " %s:%d:%Zd: field missing or parse error " , udev_rules_filename ,
lineno , temp - line ) ;
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exit :
fclose ( fd ) ;
return retval ;
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}
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int namedev_init_permissions ( void )
{
char line [ 255 ] ;
char * temp ;
char * temp2 ;
FILE * fd ;
int retval = 0 ;
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struct perm_device dev ;
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fd = fopen ( udev_permissions_filename , " r " ) ;
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if ( fd ! = NULL ) {
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dbg ( " reading '%s' as permissions file " , udev_permissions_filename ) ;
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} else {
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dbg ( " can't open '%s' as permissions file " , udev_permissions_filename ) ;
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return - ENODEV ;
}
/* loop through the whole file */
while ( 1 ) {
temp = fgets ( line , sizeof ( line ) , fd ) ;
if ( temp = = NULL )
break ;
dbg_parse ( " read '%s' " , temp ) ;
/* eat the whitespace at the beginning of the line */
while ( isspace ( * temp ) )
+ + temp ;
/* empty line? */
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if ( ( * temp = = ' \0 ' ) | | ( * temp = = ' \n ' ) )
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continue ;
/* see if this is a comment */
if ( * temp = = COMMENT_CHARACTER )
continue ;
memset ( & dev , 0x00 , sizeof ( dev ) ) ;
/* parse the line */
temp2 = strsep ( & temp , " : " ) ;
if ( ! temp2 ) {
dbg ( " cannot parse line '%s' " , line ) ;
continue ;
}
strncpy ( dev . name , temp2 , sizeof ( dev . name ) ) ;
temp2 = strsep ( & temp , " : " ) ;
if ( ! temp2 ) {
dbg ( " cannot parse line '%s' " , line ) ;
continue ;
}
strncpy ( dev . owner , temp2 , sizeof ( dev . owner ) ) ;
temp2 = strsep ( & temp , " : " ) ;
if ( ! temp2 ) {
dbg ( " cannot parse line '%s' " , line ) ;
continue ;
}
strncpy ( dev . group , temp2 , sizeof ( dev . owner ) ) ;
if ( ! temp ) {
dbg ( " cannot parse line: %s " , line ) ;
continue ;
}
dev . mode = strtol ( temp , NULL , 8 ) ;
dbg_parse ( " name='%s', owner='%s', group='%s', mode=%#o " ,
dev . name , dev . owner , dev . group ,
dev . mode ) ;
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retval = add_perm_dev ( & dev ) ;
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if ( retval ) {
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dbg ( " add_perm_dev returned with error %d " , retval ) ;
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goto exit ;
}
}
exit :
fclose ( fd ) ;
return retval ;
}