mirror of
https://github.com/sheumann/hush.git
synced 2024-08-20 04:28:57 +00:00
901 lines
23 KiB
C
901 lines
23 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Modprobe written from scratch for BusyBox
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*
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* Copyright (c) 2002 by Robert Griebl, griebl@gmx.de
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* Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au
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* Copyright (c) 2005 by Jim Bauer, jfbauer@nfr.com
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*
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* Portions Copyright (c) 2005 by Yann E. MORIN, yann.morin.1998@anciens.enib.fr
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include <sys/utsname.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <getopt.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <syslog.h>
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#include <string.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include "busybox.h"
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struct mod_opt_t { /* one-way list of options to pass to a module */
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char * m_opt_val;
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struct mod_opt_t * m_next;
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};
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struct dep_t { /* one-way list of dependency rules */
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/* a dependency rule */
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char * m_name; /* the module name*/
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char * m_path; /* the module file path */
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struct mod_opt_t * m_options; /* the module options */
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int m_isalias : 1; /* the module is an alias */
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int m_reserved : 15; /* stuffin' */
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int m_depcnt : 16; /* the number of dependable module(s) */
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char ** m_deparr; /* the list of dependable module(s) */
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struct dep_t * m_next; /* the next dependency rule */
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};
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struct mod_list_t { /* two-way list of modules to process */
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/* a module description */
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char * m_name;
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char * m_path;
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struct mod_opt_t * m_options;
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struct mod_list_t * m_prev;
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struct mod_list_t * m_next;
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};
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static struct dep_t *depend;
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#define main_options "acdklnqrst:vVC:"
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#define INSERT_ALL 1 /* a */
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#define DUMP_CONF_EXIT 2 /* c */
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#define D_OPT_IGNORED 4 /* d */
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#define AUTOCLEAN_FLG 8 /* k */
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#define LIST_ALL 16 /* l */
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#define SHOW_ONLY 32 /* n */
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#define QUIET 64 /* q */
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#define REMOVE_OPT 128 /* r */
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#define DO_SYSLOG 256 /* s */
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#define RESTRICT_DIR 512 /* t */
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#define VERBOSE 1024 /* v */
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#define VERSION_ONLY 2048 /* V */
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#define CONFIG_FILE 4096 /* C */
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#define autoclean (main_opts & AUTOCLEAN_FLG)
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#define show_only (main_opts & SHOW_ONLY)
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#define quiet (main_opts & QUIET)
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#define remove_opt (main_opts & REMOVE_OPT)
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#define do_syslog (main_opts & DO_SYSLOG)
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#define verbose (main_opts & VERBOSE)
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static int main_opts;
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static int parse_tag_value ( char *buffer, char **ptag, char **pvalue )
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{
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char *tag, *value;
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while ( isspace ( *buffer ))
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buffer++;
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tag = value = buffer;
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while ( !isspace ( *value ))
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if (!*value) return 0;
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else value++;
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*value++ = 0;
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while ( isspace ( *value ))
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value++;
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if (!*value) return 0;
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*ptag = tag;
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*pvalue = value;
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return 1;
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}
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/* Jump through hoops to simulate how fgets() grabs just one line at a
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* time... Don't use any stdio since modprobe gets called from a kernel
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* thread and stdio junk can overflow the limited stack...
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*/
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static char *reads ( int fd, char *buffer, size_t len )
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{
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int n = read ( fd, buffer, len );
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if ( n > 0 ) {
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char *p;
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buffer [len-1] = 0;
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p = strchr ( buffer, '\n' );
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if ( p ) {
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off_t offset;
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offset = lseek ( fd, 0L, SEEK_CUR ); // Get the current file descriptor offset
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lseek ( fd, offset-n + (p-buffer) + 1, SEEK_SET ); // Set the file descriptor offset to right after the \n
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p[1] = 0;
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}
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return buffer;
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}
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else
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return 0;
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}
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/*
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* This function appends an option to a list
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*/
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static struct mod_opt_t *append_option( struct mod_opt_t *opt_list, char *opt )
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{
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struct mod_opt_t *ol = opt_list;
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if( ol ) {
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while( ol-> m_next ) {
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ol = ol-> m_next;
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}
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ol-> m_next = xmalloc( sizeof( struct mod_opt_t ) );
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ol = ol-> m_next;
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} else {
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ol = opt_list = xmalloc( sizeof( struct mod_opt_t ) );
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}
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ol-> m_opt_val = bb_xstrdup( opt );
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ol-> m_next = NULL;
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return opt_list;
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}
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#if ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS
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/* static char* parse_command_string( char* src, char **dst );
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* src: pointer to string containing argument
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* dst: pointer to where to store the parsed argument
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* return value: the pointer to the first char after the parsed argument,
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* NULL if there was no argument parsed (only trailing spaces).
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* Note that memory is allocated with bb_xstrdup when a new argument was
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* parsed. Don't forget to free it!
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*/
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#define ARG_EMPTY 0x00
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#define ARG_IN_DQUOTES 0x01
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#define ARG_IN_SQUOTES 0x02
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static char *parse_command_string( char *src, char **dst )
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{
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int opt_status = ARG_EMPTY;
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char* tmp_str;
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/* Dumb you, I have nothing to do... */
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if( src == NULL ) return src;
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/* Skip leading spaces */
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while( *src == ' ' ) {
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src++;
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}
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/* Is the end of string reached? */
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if( *src == '\0' ) {
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return NULL;
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}
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/* Reached the start of an argument
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* By the way, we duplicate a little too much
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* here but what is too much is freed later. */
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*dst = tmp_str = bb_xstrdup( src );
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/* Get to the end of that argument */
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while( ( *tmp_str != '\0' )
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&& ( ( *tmp_str != ' ' )
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|| ( opt_status & ( ARG_IN_DQUOTES | ARG_IN_SQUOTES ) ) ) ) {
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switch( *tmp_str ) {
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case '\'':
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if( opt_status & ARG_IN_DQUOTES ) {
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/* Already in double quotes, keep current char as is */
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} else {
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/* shift left 1 char, until end of string: get rid of the opening/closing quotes */
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memmove( tmp_str, tmp_str + 1, strlen( tmp_str ) );
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/* mark me: we enter or leave single quotes */
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opt_status ^= ARG_IN_SQUOTES;
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/* Back one char, as we need to re-scan the new char there. */
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tmp_str--;
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}
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break;
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case '"':
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if( opt_status & ARG_IN_SQUOTES ) {
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/* Already in single quotes, keep current char as is */
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} else {
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/* shift left 1 char, until end of string: get rid of the opening/closing quotes */
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memmove( tmp_str, tmp_str + 1, strlen( tmp_str ) );
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/* mark me: we enter or leave double quotes */
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opt_status ^= ARG_IN_DQUOTES;
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/* Back one char, as we need to re-scan the new char there. */
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tmp_str--;
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}
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break;
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case '\\':
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if( opt_status & ARG_IN_SQUOTES ) {
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/* Between single quotes: keep as is. */
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} else {
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switch( *(tmp_str+1) ) {
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case 'a':
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case 'b':
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case 't':
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case 'n':
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case 'v':
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case 'f':
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case 'r':
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case '0':
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/* We escaped a special character. For now, keep
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* both the back-slash and the following char. */
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tmp_str++; src++;
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break;
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default:
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/* We escaped a space or a single or double quote,
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* or a back-slash, or a non-escapable char. Remove
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* the '\' and keep the new current char as is. */
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memmove( tmp_str, tmp_str + 1, strlen( tmp_str ) );
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break;
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}
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}
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break;
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/* Any other char that is special shall appear here.
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* Example: $ starts a variable
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case '$':
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do_variable_expansion();
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break;
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* */
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default:
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/* any other char is kept as is. */
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break;
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}
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tmp_str++; /* Go to next char */
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src++; /* Go to next char to find the end of the argument. */
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}
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/* End of string, but still no ending quote */
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if( opt_status & ( ARG_IN_DQUOTES | ARG_IN_SQUOTES ) ) {
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bb_error_msg_and_die( "unterminated (single or double) quote in options list: %s", src );
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}
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*tmp_str++ = '\0';
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*dst = xrealloc( *dst, (tmp_str - *dst ) );
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return src;
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}
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#else
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#define parse_command_string(src, dst) (0)
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#endif /* ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
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/*
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* This function reads aliases and default module options from a configuration file
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* (/etc/modprobe.conf syntax). It supports includes (only files, no directories).
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*/
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static void include_conf ( struct dep_t **first, struct dep_t **current, char *buffer, int buflen, int fd )
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{
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int continuation_line = 0;
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// alias parsing is not 100% correct (no correct handling of continuation lines within an alias) !
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while ( reads ( fd, buffer, buflen)) {
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int l;
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char *p;
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p = strchr ( buffer, '#' );
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if ( p )
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*p = 0;
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l = strlen ( buffer );
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while ( l && isspace ( buffer [l-1] )) {
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buffer [l-1] = 0;
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l--;
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}
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if ( l == 0 ) {
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continuation_line = 0;
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continue;
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}
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if ( !continuation_line ) {
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if (( strncmp ( buffer, "alias", 5 ) == 0 ) && isspace ( buffer [5] )) {
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char *alias, *mod;
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if ( parse_tag_value ( buffer + 6, &alias, &mod )) {
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/* handle alias as a module dependent on the aliased module */
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if ( !*current ) {
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(*first) = (*current) = (struct dep_t *) xcalloc ( 1, sizeof ( struct dep_t ));
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}
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else {
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(*current)-> m_next = (struct dep_t *) xcalloc ( 1, sizeof ( struct dep_t ));
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(*current) = (*current)-> m_next;
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}
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(*current)-> m_name = bb_xstrdup ( alias );
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(*current)-> m_isalias = 1;
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if (( strcmp ( mod, "off" ) == 0 ) || ( strcmp ( mod, "null" ) == 0 )) {
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(*current)-> m_depcnt = 0;
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(*current)-> m_deparr = 0;
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}
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else {
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(*current)-> m_depcnt = 1;
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(*current)-> m_deparr = xmalloc ( 1 * sizeof( char * ));
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(*current)-> m_deparr[0] = bb_xstrdup ( mod );
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}
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(*current)-> m_next = 0;
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}
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}
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else if (( strncmp ( buffer, "options", 7 ) == 0 ) && isspace ( buffer [7] )) {
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char *mod, *opt;
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/* split the line in the module/alias name, and options */
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if ( parse_tag_value ( buffer + 8, &mod, &opt )) {
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struct dep_t *dt;
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/* find the corresponding module */
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for ( dt = *first; dt; dt = dt-> m_next ) {
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if ( strcmp ( dt-> m_name, mod ) == 0 )
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break;
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}
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if ( dt ) {
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if ( ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS ) {
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char* new_opt = NULL;
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while( ( opt = parse_command_string( opt, &new_opt ) ) ) {
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dt-> m_options = append_option( dt-> m_options, new_opt );
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}
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} else {
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dt-> m_options = append_option( dt-> m_options, opt );
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}
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}
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}
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}
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else if (( strncmp ( buffer, "include", 7 ) == 0 ) && isspace ( buffer [7] )) {
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int fdi; char *filename = buffer + 8;
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while ( isspace ( *filename ))
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filename++;
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if (( fdi = open ( filename, O_RDONLY )) >= 0 ) {
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include_conf(first, current, buffer, buflen, fdi);
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close(fdi);
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}
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}
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}
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}
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}
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/*
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* This function builds a list of dependency rules from /lib/modules/`uname -r`\modules.dep.
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* It then fills every modules and aliases with their default options, found by parsing
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* modprobe.conf (or modules.conf, or conf.modules).
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*/
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static struct dep_t *build_dep ( void )
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{
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int fd;
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struct utsname un;
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struct dep_t *first = 0;
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struct dep_t *current = 0;
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char buffer[2048];
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char *filename;
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int continuation_line = 0;
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int k_version;
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k_version = 0;
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if ( uname ( &un ))
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bb_error_msg_and_die("can't determine kernel version");
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if (un.release[0] == '2') {
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k_version = un.release[2] - '0';
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}
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filename = bb_xasprintf("/lib/modules/%s/modules.dep", un.release );
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fd = open ( filename, O_RDONLY );
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if (ENABLE_FEATURE_CLEAN_UP)
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free(filename);
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if (fd < 0) {
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/* Ok, that didn't work. Fall back to looking in /lib/modules */
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if (( fd = open ( "/lib/modules/modules.dep", O_RDONLY )) < 0 ) {
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return 0;
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}
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}
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while ( reads ( fd, buffer, sizeof( buffer ))) {
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int l = strlen ( buffer );
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char *p = 0;
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while ( l > 0 && isspace ( buffer [l-1] )) {
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buffer [l-1] = 0;
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l--;
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}
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if ( l == 0 ) {
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continuation_line = 0;
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continue;
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}
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/* Is this a new module dep description? */
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if ( !continuation_line ) {
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/* find the dep beginning */
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char *col = strchr ( buffer, ':' );
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char *dot = col;
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if ( col ) {
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/* This line is a dep description */
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char *mods;
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char *modpath;
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char *mod;
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/* Find the beginning of the module file name */
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*col = 0;
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mods = strrchr ( buffer, '/' );
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if ( !mods )
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mods = buffer; /* no path for this module */
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else
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mods++; /* there was a path for this module... */
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/* find the path of the module */
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modpath = strchr ( buffer, '/' ); /* ... and this is the path */
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if ( !modpath )
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modpath = buffer; /* module with no path */
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/* find the end of the module name in the file name */
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if ( ENABLE_FEATURE_2_6_MODULES &&
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(k_version > 4) && ( *(col-3) == '.' ) &&
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( *(col-2) == 'k' ) && ( *(col-1) == 'o' ) )
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dot = col - 3;
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else
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if (( *(col-2) == '.' ) && ( *(col-1) == 'o' ))
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dot = col - 2;
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mod = bb_xstrndup ( mods, dot - mods );
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/* enqueue new module */
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if ( !current ) {
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first = current = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
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}
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else {
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current-> m_next = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
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current = current-> m_next;
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}
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current-> m_name = mod;
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current-> m_path = bb_xstrdup(modpath);
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current-> m_options = NULL;
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current-> m_isalias = 0;
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current-> m_depcnt = 0;
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current-> m_deparr = 0;
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current-> m_next = 0;
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p = col + 1;
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}
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else
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/* this line is not a dep description */
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p = 0;
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}
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else
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/* It's a dep description continuation */
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p = buffer;
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while ( p && *p && isblank(*p))
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p++;
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/* p points to the first dependable module; if NULL, no dependable module */
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if ( p && *p ) {
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char *end = &buffer [l-1];
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char *deps;
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char *dep;
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char *next;
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int ext = 0;
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while ( isblank ( *end ) || ( *end == '\\' ))
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end--;
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do
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{
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/* search the end of the dependency */
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next = strchr (p, ' ' );
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if (next)
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{
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*next = 0;
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next--;
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}
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else
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next = end;
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/* find the beginning of the module file name */
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deps = strrchr ( p, '/' );
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if ( !deps || ( deps < p )) {
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deps = p;
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while ( isblank ( *deps ))
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deps++;
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}
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else
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deps++;
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/* find the end of the module name in the file name */
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if ( ENABLE_FEATURE_2_6_MODULES &&
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(k_version > 4) && ( *(next-2) == '.' ) &&
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( *(next-1) == 'k' ) && ( *next == 'o' ) )
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ext = 3;
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else
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if (( *(next-1) == '.' ) && ( *next == 'o' ))
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ext = 2;
|
|
|
|
/* Cope with blank lines */
|
|
if ((next-deps-ext+1) <= 0)
|
|
continue;
|
|
dep = bb_xstrndup ( deps, next - deps - ext + 1 );
|
|
|
|
/* Add the new dependable module name */
|
|
current-> m_depcnt++;
|
|
current-> m_deparr = (char **) xrealloc ( current-> m_deparr,
|
|
sizeof ( char *) * current-> m_depcnt );
|
|
current-> m_deparr [current-> m_depcnt - 1] = dep;
|
|
|
|
p = next + 2;
|
|
} while (next < end);
|
|
}
|
|
|
|
/* is there other dependable module(s) ? */
|
|
if ( buffer [l-1] == '\\' )
|
|
continuation_line = 1;
|
|
else
|
|
continuation_line = 0;
|
|
}
|
|
close ( fd );
|
|
|
|
if (!ENABLE_FEATURE_2_6_MODULES
|
|
|| ( fd = open ( "/etc/modprobe.conf", O_RDONLY )) < 0 )
|
|
if (( fd = open ( "/etc/modules.conf", O_RDONLY )) < 0 )
|
|
if (( fd = open ( "/etc/conf.modules", O_RDONLY )) < 0 )
|
|
return first;
|
|
|
|
include_conf (&first, ¤t, buffer, sizeof(buffer), fd);
|
|
close(fd);
|
|
|
|
filename = bb_xasprintf("/lib/modules/%s/modules.alias", un.release);
|
|
fd = open ( filename, O_RDONLY );
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
free(filename);
|
|
if (fd < 0) {
|
|
/* Ok, that didn't work. Fall back to looking in /lib/modules */
|
|
if (( fd = open ( "/lib/modules/modules.alias", O_RDONLY )) < 0 ) {
|
|
return first;
|
|
}
|
|
}
|
|
|
|
include_conf (&first, ¤t, buffer, sizeof(buffer), fd);
|
|
close(fd);
|
|
|
|
return first;
|
|
}
|
|
|
|
/* return 1 = loaded, 0 = not loaded, -1 = can't tell */
|
|
static int already_loaded (const char *name)
|
|
{
|
|
int fd;
|
|
char buffer[4096];
|
|
|
|
fd = open ("/proc/modules", O_RDONLY);
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
while ( reads ( fd, buffer, sizeof( buffer ))) {
|
|
char *p;
|
|
|
|
p = strchr (buffer, ' ');
|
|
if (p) {
|
|
*p = 0;
|
|
for( p = buffer; ENABLE_FEATURE_2_6_MODULES && *p; p++ ) {
|
|
*p = ((*p)=='-')?'_':*p;
|
|
}
|
|
if (strcmp (name, buffer) == 0) {
|
|
close (fd);
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
close (fd);
|
|
return 0;
|
|
}
|
|
|
|
static int mod_process ( struct mod_list_t *list, int do_insert )
|
|
{
|
|
int rc = 0;
|
|
char **argv = NULL;
|
|
struct mod_opt_t *opts;
|
|
int argc_malloc; /* never used when CONFIG_FEATURE_CLEAN_UP not defined */
|
|
int argc;
|
|
|
|
while ( list ) {
|
|
argc = 0;
|
|
if( ENABLE_FEATURE_CLEAN_UP )
|
|
argc_malloc = 0;
|
|
/* If CONFIG_FEATURE_CLEAN_UP is not defined, then we leak memory
|
|
* each time we allocate memory for argv.
|
|
* But it is (quite) small amounts of memory that leak each
|
|
* time a module is loaded, and it is reclaimed when modprobe
|
|
* exits anyway (even when standalone shell?).
|
|
* 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. */
|
|
/* enough for minimal insmod (5 args + NULL) or rmmod (3 args + NULL) */
|
|
argv = (char**) malloc( 6 * sizeof( char* ) );
|
|
if ( do_insert ) {
|
|
if (already_loaded (list->m_name) != 1) {
|
|
argv[argc++] = "insmod";
|
|
if (do_syslog)
|
|
argv[argc++] = "-s";
|
|
if (autoclean)
|
|
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;
|
|
if( ENABLE_FEATURE_CLEAN_UP )
|
|
argc_malloc = argc;
|
|
opts = list-> m_options;
|
|
while( opts ) {
|
|
/* Add one more option */
|
|
argc++;
|
|
argv = (char**) xrealloc( argv, ( argc + 1 ) * sizeof( char* ) );
|
|
argv[argc-1] = opts-> m_opt_val;
|
|
opts = opts-> m_next;
|
|
}
|
|
}
|
|
} else {
|
|
/* modutils uses short name for removal */
|
|
if (already_loaded (list->m_name) != 0) {
|
|
argv[argc++] = "rmmod";
|
|
if (do_syslog)
|
|
argv[argc++] = "-s";
|
|
argv[argc++] = list->m_name;
|
|
if( ENABLE_FEATURE_CLEAN_UP )
|
|
argc_malloc = argc;
|
|
}
|
|
}
|
|
argv[argc] = NULL;
|
|
|
|
if (argc) {
|
|
if (verbose) {
|
|
printf("%s module %s\n", do_insert?"Loading":"Unloading", list-> m_name );
|
|
}
|
|
if (!show_only) {
|
|
int rc2 = 0;
|
|
int status;
|
|
switch (fork()) {
|
|
case -1:
|
|
rc2 = 1;
|
|
break;
|
|
case 0: //child
|
|
execvp(argv[0], argv);
|
|
bb_perror_msg_and_die("exec of %s", argv[0]);
|
|
/* NOTREACHED */
|
|
default:
|
|
if (wait(&status) == -1) {
|
|
rc2 = 1;
|
|
break;
|
|
}
|
|
if (WIFEXITED(status))
|
|
rc2 = WEXITSTATUS(status);
|
|
if (WIFSIGNALED(status))
|
|
rc2 = WTERMSIG(status);
|
|
break;
|
|
}
|
|
if (do_insert) {
|
|
rc = rc2; /* only last module matters */
|
|
}
|
|
else if (!rc2) {
|
|
rc = 0; /* success if remove any mod */
|
|
}
|
|
}
|
|
if( ENABLE_FEATURE_CLEAN_UP )
|
|
/* the last value in the array has index == argc, but
|
|
* it is the terminating NULL, so we must not free it. */
|
|
while( argc_malloc < argc ) {
|
|
free( argv[argc_malloc++] );
|
|
}
|
|
}
|
|
if( ENABLE_FEATURE_CLEAN_UP ) {
|
|
free( argv );
|
|
argv = NULL;
|
|
}
|
|
list = do_insert ? list-> m_prev : list-> m_next;
|
|
}
|
|
return (show_only) ? 0 : rc;
|
|
}
|
|
|
|
/*
|
|
* Builds the dependency list (aka stack) of a module.
|
|
* head: the highest module in the stack (last to insmod, first to rmmod)
|
|
* tail: the lowest module in the stack (first to insmod, last to rmmod)
|
|
*/
|
|
static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t **tail )
|
|
{
|
|
struct mod_list_t *find;
|
|
struct dep_t *dt;
|
|
struct mod_opt_t *opt = 0;
|
|
char *path = 0;
|
|
|
|
// check dependencies
|
|
for ( dt = depend; dt; dt = dt-> m_next ) {
|
|
if ( strcmp ( dt-> m_name, mod ) == 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if( !dt ) {
|
|
bb_error_msg ("module %s not found.", mod);
|
|
return;
|
|
}
|
|
|
|
// resolve alias names
|
|
while ( dt-> m_isalias ) {
|
|
if ( dt-> m_depcnt == 1 ) {
|
|
struct dep_t *adt;
|
|
|
|
for ( adt = depend; adt; adt = adt-> m_next ) {
|
|
if ( strcmp ( adt-> m_name, dt-> m_deparr [0] ) == 0 )
|
|
break;
|
|
}
|
|
if ( adt ) {
|
|
/* This is the module we are aliased to */
|
|
struct mod_opt_t *opts = dt-> m_options;
|
|
/* Option of the alias are appended to the options of the module */
|
|
while( opts ) {
|
|
adt-> m_options = append_option( adt-> m_options, opts-> m_opt_val );
|
|
opts = opts-> m_next;
|
|
}
|
|
dt = adt;
|
|
}
|
|
else {
|
|
bb_error_msg ("module %s not found.", mod);
|
|
return;
|
|
}
|
|
}
|
|
else {
|
|
bb_error_msg ("Bad alias %s", dt-> m_name);
|
|
return;
|
|
}
|
|
}
|
|
|
|
mod = dt-> m_name;
|
|
path = dt-> m_path;
|
|
opt = dt-> m_options;
|
|
|
|
// search for duplicates
|
|
for ( find = *head; find; find = find-> m_next ) {
|
|
if ( !strcmp ( mod, find-> m_name )) {
|
|
// found -> dequeue it
|
|
|
|
if ( find-> m_prev )
|
|
find-> m_prev-> m_next = find-> m_next;
|
|
else
|
|
*head = find-> m_next;
|
|
|
|
if ( find-> m_next )
|
|
find-> m_next-> m_prev = find-> m_prev;
|
|
else
|
|
*tail = find-> m_prev;
|
|
|
|
break; // there can be only one duplicate
|
|
}
|
|
}
|
|
|
|
if ( !find ) { // did not find a duplicate
|
|
find = (struct mod_list_t *) xmalloc ( sizeof(struct mod_list_t));
|
|
find-> m_name = mod;
|
|
find-> m_path = path;
|
|
find-> m_options = opt;
|
|
}
|
|
|
|
// enqueue at tail
|
|
if ( *tail )
|
|
(*tail)-> m_next = find;
|
|
find-> m_prev = *tail;
|
|
find-> m_next = 0;
|
|
|
|
if ( !*head )
|
|
*head = find;
|
|
*tail = find;
|
|
|
|
if ( dt ) {
|
|
int i;
|
|
|
|
/* Add all dependable module for that new module */
|
|
for ( i = 0; i < dt-> m_depcnt; i++ )
|
|
check_dep ( dt-> m_deparr [i], head, tail );
|
|
}
|
|
}
|
|
|
|
static int mod_insert ( char *mod, int argc, char **argv )
|
|
{
|
|
struct mod_list_t *tail = 0;
|
|
struct mod_list_t *head = 0;
|
|
int rc;
|
|
|
|
// get dep list for module mod
|
|
check_dep ( mod, &head, &tail );
|
|
|
|
if ( head && tail ) {
|
|
if( argc ) {
|
|
int i;
|
|
// append module args
|
|
for ( i = 0; i < argc; i++ )
|
|
head->m_options = append_option( head->m_options, argv[i] );
|
|
}
|
|
|
|
// process tail ---> head
|
|
rc = mod_process ( tail, 1 );
|
|
}
|
|
else
|
|
rc = 1;
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int mod_remove ( char *mod )
|
|
{
|
|
int rc;
|
|
static struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL };
|
|
|
|
struct mod_list_t *head = 0;
|
|
struct mod_list_t *tail = 0;
|
|
|
|
if ( mod )
|
|
check_dep ( mod, &head, &tail );
|
|
else // autoclean
|
|
head = tail = &rm_a_dummy;
|
|
|
|
if ( head && tail )
|
|
rc = mod_process ( head, 0 ); // process head ---> tail
|
|
else
|
|
rc = 1;
|
|
return rc;
|
|
|
|
}
|
|
|
|
int modprobe_main(int argc, char** argv)
|
|
{
|
|
int rc = EXIT_SUCCESS;
|
|
char *unused;
|
|
|
|
bb_opt_complementally = "?V-:q-v:v-q";
|
|
main_opts = bb_getopt_ulflags(argc, argv, "acdklnqrst:vVC:",
|
|
&unused, &unused);
|
|
if((main_opts & (DUMP_CONF_EXIT | LIST_ALL)))
|
|
return EXIT_SUCCESS;
|
|
if((main_opts & (RESTRICT_DIR | CONFIG_FILE)))
|
|
bb_error_msg_and_die("-t and -C not supported");
|
|
|
|
depend = build_dep ( );
|
|
|
|
if ( !depend )
|
|
bb_error_msg_and_die ( "could not parse modules.dep\n" );
|
|
|
|
if (remove_opt) {
|
|
do {
|
|
if (mod_remove ( optind < argc ?
|
|
argv [optind] : NULL )) {
|
|
bb_error_msg ("failed to remove module %s",
|
|
argv [optind] );
|
|
rc = EXIT_FAILURE;
|
|
}
|
|
} while ( ++optind < argc );
|
|
} else {
|
|
if (optind >= argc)
|
|
bb_error_msg_and_die ( "No module or pattern provided\n" );
|
|
|
|
if ( mod_insert ( argv [optind], argc - optind - 1, argv + optind + 1 ))
|
|
bb_error_msg_and_die ( "failed to load module %s", argv [optind] );
|
|
}
|
|
|
|
/* Here would be a good place to free up memory allocated during the dependencies build. */
|
|
|
|
return rc;
|
|
}
|