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authorGravatar Rob Landley <rob@landley.net>2005-11-15 00:08:29 +0000
committerGravatar Rob Landley <rob@landley.net>2005-11-15 00:08:29 +0000
commit79e1cab0d16468b114ea93e53eb63b76b5d39b62 (patch)
tree01661313c86e843b107b40aa78a3cfceed9c48c5 /modutils
parent9033453c1849df49d2be39bca92c5b7cdb3234e3 (diff)
downloadbusybox-79e1cab0d16468b114ea93e53eb63b76b5d39b62.tar.gz
busybox-79e1cab0d16468b114ea93e53eb63b76b5d39b62.tar.bz2
Yann Morin's modprobe multiple options patch. There's more work to be done,
but let's ship 1.1 first...
Diffstat (limited to 'modutils')
-rw-r--r--modutils/Config.in19
-rw-r--r--modutils/modprobe.c189
2 files changed, 186 insertions, 22 deletions
diff --git a/modutils/Config.in b/modutils/Config.in
index 986b65c6a..bf19a3e67 100644
--- a/modutils/Config.in
+++ b/modutils/Config.in
@@ -100,6 +100,25 @@ config CONFIG_MODPROBE
Handle the loading of modules, and their dependancies on a high
level.
+ Note that, in the state it is, modprobe can pass only one option
+ to the modules it loads. See option below.
+
+config CONFIG_MODPROBE_MULTIPLE_OPTIONS
+ bool "Multiple options parsing"
+ default y
+ depends on CONFIG_MODPROBE
+ help
+ Allow modprobe to understand more than one option to pass to
+ modules.
+
+ This is a WIP, while waiting for a common argument parsing
+ common amongst all BB applets (shell, modprobe, etc...) and
+ adds around 600 bytes on x86, 700 bytes on ARM. The code is
+ biggish and uggly, but just works.
+
+ Saying Y here is not a bad idea if you're not that short
+ on storage capacity.
+
config CONFIG_RMMOD
bool "rmmod"
default n
diff --git a/modutils/modprobe.c b/modutils/modprobe.c
index 8d739ef3c..998c8668e 100644
--- a/modutils/modprobe.c
+++ b/modutils/modprobe.c
@@ -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: