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Yann Morin's modprobe multiple options patch. There's more work to be done,

Browse Source 
but let's ship 1.1 first...
This commit is contained in:
Rob Landley
2005-11-15 00:08:29 +00:00
parent 9033453c18
commit 79e1cab0d1
2 changed files with 186 additions and 22 deletions
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189
modutils/modprobe.c
View File

@@ -6,20 +6,7 @@
* Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au
* Copyright (c) 2005 by Jim Bauer, jfbauer@nfr.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; either version 2 of the License, or
* (at your option) any later version.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include <sys/utsname.h>
@@ -394,16 +381,139 @@ static int already_loaded (const char *name)
return 0;
}
#ifdef CONFIG_MODPROBE_MULTIPLE_OPTIONS
/* static char* parse_command_string( char* src, char **dst );
* src: pointer to string containing argument
* dst: pointer to where to store the parsed argument
* return value: the pointer to the first char after the parsed argument,
* NULL if there was no argument parsed (only trailing spaces).
* Note that memory is allocated with bb_xstrdup when a new argument was
* parsed. Don't forget to free it!
*/
#define ARG_EMPTY 0x00
#define ARG_IN_DQUOTES 0x01
#define ARG_IN_SQUOTES 0x02
static char *parse_command_string( char *src, char **dst )
{
int opt_status = ARG_EMPTY;
char* tmp_str;
/* Dumb you, I have nothing to do... */
if( src == NULL ) return src;
/* Skip leading spaces */
while( *src == ' ' ) {
src++;
}
/* Is the end of string reached? */
if( *src == '\0' ) {
return NULL;
}
/* Reached the start of an argument
* By the way, we duplicate a little too much here :-/ but that's the easy way:
* cost effective wrt code, cost consumming wrt memory usage. */
*dst = tmp_str = bb_xstrdup( src );
/* Get to the end of that argument */
while( ( *tmp_str != '\0' )
&& ( ( *tmp_str != ' ' )
|| ( opt_status & ( ARG_IN_DQUOTES | ARG_IN_SQUOTES ) ) ) ) {
switch( *tmp_str ) {
case '\'':
if( opt_status & ARG_IN_DQUOTES ) {
/* Already in double quotes, keep current char as is */
} else {
/* shift left 1 char, until end of string: get rid of the opening/closing quotes */
memmove( tmp_str, tmp_str + 1, strlen( tmp_str ) );
/* mark me: we enter or leave single quotes */
opt_status ^= ARG_IN_SQUOTES;
/* Back one char, as we need to re-scan the new char there. */
tmp_str--;
}
break;
case '"':
if( opt_status & ARG_IN_SQUOTES ) {
/* Already in single quotes, keep current char as is */
} else {
/* shift left 1 char, until end of string: get rid of the opening/closing quotes */
memmove( tmp_str, tmp_str + 1, strlen( tmp_str ) );
/* mark me: we enter or leave double quotes */
opt_status ^= ARG_IN_DQUOTES;
/* Back one char, as we need to re-scan the new char there. */
tmp_str--;
}
break;
case '\\':
if( opt_status & ARG_IN_SQUOTES ) {
/* Between single quotes: keep as is. */
} else {
switch( *(tmp_str+1) ) {
case 'a':
case 'b':
case 't':
case 'n':
case 'v':
case 'f':
case 'r':
case '0':
/* We escaped a special character. For now, keep
* both the back-slash and the following char. */
tmp_str++; src++;
break;
default:
/* We escaped a space or a single or double quote,
* or a back-slash, or a non-escapable char. Remove
* the '\' and keep the new current char as is. */
memmove( tmp_str, tmp_str + 1, strlen( tmp_str ) );
break;
}
}
break;
/* Any other char that is special shall appear here.
* Example: $ starts a variable
case '$':
do_variable_expansion();
break;
* */
default:
/* any other char is kept as is. */
break;
}
tmp_str++; /* Go to next char */
src++; /* Go to next char to find the end of the argument. */
}
/* End of string, but still no ending quote */
if( opt_status & ( ARG_IN_DQUOTES | ARG_IN_SQUOTES ) ) {
bb_error_msg_and_die( "unterminated (single or double) quote in options list: %s", src );
}
*tmp_str = '\0';
return src;
}
#endif /* CONFIG_MODPROBE_MULTIPLE_OPTIONS */
static int mod_process ( struct mod_list_t *list, int do_insert )
{
int rc = 0;
#ifdef CONFIG_MODPROBE_MULTIPLE_OPTIONS
char **argv = NULL;
char *opts;
#ifdef CONFIG_FEATURE_CLEAN_UP
int argc_malloc;
#endif
#else /* CONFIG_MODPROBE_MULTIPLE_OPTIONS */
char *argv[10];
#endif
int argc;
while ( list ) {
argc = 0;
#ifdef CONFIG_MODPROBE_MULTIPLE_OPTIONS
#ifdef CONFIG_FEATURE_CLEAN_UP
argc_malloc = 0;
#endif
argv = (char**) malloc( 6 * sizeof( char* ) ); /* enough for minimal insmod (5 args + NULL) or rmmod (3 args + NULL) */
#endif
if ( do_insert ) {
if (already_loaded (list->m_name) != 1) {
if (already_loaded (list->m_name) != 1) {
argv[argc++] = "insmod";
if (do_syslog)
argv[argc++] = "-s";
@@ -411,17 +521,34 @@ static int mod_process ( struct mod_list_t *list, int do_insert )
argv[argc++] = "-k";
if (quiet)
argv[argc++] = "-q";
else if(verbose) /* verbose and quiet are mutually exclusive */
argv[argc++] = "-v";
argv[argc++] = list-> m_path;
#ifdef CONFIG_MODPROBE_MULTIPLE_OPTIONS
#ifdef CONFIG_FEATURE_CLEAN_UP
argc_malloc = argc;
#endif
opts = list-> m_options;
while( ( opts = parse_command_string( opts, &(argv[argc]) ) ) != NULL ) {
/* Increase the argv array by 1 */
argc++;
argv = (char**) xrealloc( argv, ( argc + 1 ) * sizeof( char* ) );
}
#else /* CONFIG_MODPROBE_MULTIPLE_OPTIONS */
if (list-> m_options)
argv[argc++] = list-> m_options;
#endif /* CONFIG_MODPROBE_MULTIPLE_OPTIONS */
}
} else {
/* modutils uses short name for removal */
if (already_loaded (list->m_name) != 0) {
if (already_loaded (list->m_name) != 0) {
argv[argc++] = "rmmod";
if (do_syslog)
argv[argc++] = "-s";
argv[argc++] = list->m_name;
#if ( defined CONFIG_MODPROBE_MULTIPLE_OPTIONS ) && ( defined CONFIG_FEATURE_CLEAN_UP )
argc_malloc = argc;
#endif
}
}
argv[argc] = NULL;
@@ -429,9 +556,9 @@ static int mod_process ( struct mod_list_t *list, int do_insert )
if (argc) {
if (verbose) {
int i;
printf("argc=%d\n", argc );
for (i=0; i<argc; i++)
printf("%s ", argv[i]);
printf("\n");
printf("argv[%02d]=\"%s\"\n", i, argv[i]);
}
if (!show_only) {
int rc2 = 0;
@@ -462,7 +589,27 @@ static int mod_process ( struct mod_list_t *list, int do_insert )
rc = 0; /* success if remove any mod */
}
}
#if ( defined CONFIG_MODPROBE_MULTIPLE_OPTIONS ) && ( defined CONFIG_FEATURE_CLEAN_UP )
/* the last value in the array has index == argc, but
* it is the terminatign NULL, so we must not free it. */
while( argc_malloc < argc ) {
free( argv[argc_malloc++] );
}
}
free( argv );
/* If CONFIG_FEATURE_CLEAN_UP is not defined, then we leak memory
* here. But it is (quite) small amounts of memory that leak each
* time a module is loaded, and it is reclaimed when modprobe
* exits anyway.
* This could become a problem when loading a module with LOTS of
* dependencies, with LOTS of options for each dependencies, with
* very little memory on the target... But in that case, the module
* would not load because there is no more memory, so there's no
* problem. Hmm, wait... Is this true, whatever the allocation policy? */
argv = NULL;
#else /* CONFIG_MODPROBE_MULTIPLE_OPTIONS && CONFIG_FEATURE_CLEAN_UP */
}
#endif
list = do_insert ? list-> m_prev : list-> m_next;
}
return (show_only) ? 0 : rc;
@@ -557,8 +704,6 @@ static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t *
}
}
static int mod_insert ( char *mod, int argc, char **argv )
{
struct mod_list_t *tail = 0;
@@ -645,7 +790,7 @@ extern int modprobe_main(int argc, char** argv)
show_only++;
break;
case 'q':
quiet++;
quiet++; verbose=0;
break;
case 'r':
remove_opt++;
@@ -654,7 +799,7 @@ extern int modprobe_main(int argc, char** argv)
do_syslog++;
break;
case 'v':
verbose++;
verbose++; quiet=0;
break;
case 'V':
default: