mirror of
https://github.com/sheumann/hush.git
synced 2024-12-29 13:30:02 +00:00
916 lines
24 KiB
C
916 lines
24 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 "libbb.h"
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#include <sys/utsname.h>
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#include <fnmatch.h>
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#define line_buffer bb_common_bufsiz1
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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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unsigned int m_isalias :1; /* the module is an alias */
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unsigned int m_isblacklisted:1; /* the module is blacklisted */
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unsigned int m_reserved :14; /* stuffin' */
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unsigned 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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const 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_OPT_STR "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 (option_mask32 & AUTOCLEAN_FLG)
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#define show_only (option_mask32 & SHOW_ONLY)
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#define quiet (option_mask32 & QUIET)
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#define remove_opt (option_mask32 & REMOVE_OPT)
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#define do_syslog (option_mask32 & DO_SYSLOG)
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#define verbose (option_mask32 & VERBOSE)
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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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buffer = skip_whitespace(buffer);
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tag = value = buffer;
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while (!isspace(*value)) {
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if (!*value)
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return 0;
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value++;
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}
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*value++ = '\0';
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value = skip_whitespace(value);
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if (!*value)
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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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/*
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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 = xzalloc(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 = xzalloc(sizeof(struct mod_opt_t));
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}
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ol->m_opt_val = xstrdup(opt);
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/*ol->m_next = NULL; - done by xzalloc*/
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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 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 = 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 != ' ' || (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)))
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) {
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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++;
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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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static int is_conf_command(char *buffer, const char *command)
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{
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int len = strlen(command);
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return ((strstr(buffer, command) == buffer) &&
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isspace(buffer[len]));
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}
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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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*strchrnul(buffer, '#') = '\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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continue;
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if (is_conf_command(buffer, "alias")) {
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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) = xzalloc(sizeof(struct dep_t));
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} else {
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(*current)->m_next = xzalloc(sizeof(struct dep_t));
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(*current) = (*current)->m_next;
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}
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(*current)->m_name = 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; - done by xzalloc */
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/*(*current)->m_deparr = 0;*/
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} else {
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(*current)->m_depcnt = 1;
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(*current)->m_deparr = xmalloc(sizeof(char *));
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(*current)->m_deparr[0] = xstrdup(mod);
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}
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/*(*current)->m_next = NULL; - done by xzalloc */
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}
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} else if (is_conf_command(buffer, "options")) {
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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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} else if (is_conf_command(buffer, "include")) {
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int fdi;
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char *filename;
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filename = skip_whitespace(buffer + 8);
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fdi = open(filename, O_RDONLY);
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if (fdi >= 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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} else if (ENABLE_FEATURE_MODPROBE_BLACKLIST &&
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(is_conf_command(buffer, "blacklist"))) {
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char *mod;
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struct dep_t *dt;
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mod = skip_whitespace(buffer + 10);
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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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dt->m_isblacklisted = 1;
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}
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} /* while (reads(...)) */
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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 = NULL;
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struct dep_t *current = NULL;
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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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if (uname(&un))
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bb_error_msg_and_die("can't determine kernel version");
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k_version = 0;
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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 = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/"CONFIG_DEFAULT_DEPMOD_FILE, 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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fd = open(CONFIG_DEFAULT_MODULES_DIR"/"CONFIG_DEFAULT_DEPMOD_FILE, O_RDONLY);
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if (fd < 0) {
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bb_error_msg_and_die("cannot parse " CONFIG_DEFAULT_DEPMOD_FILE);
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}
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}
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while (reads(fd, line_buffer, sizeof(line_buffer))) {
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int l = strlen(line_buffer);
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char *p = 0;
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while (l > 0 && isspace(line_buffer[l-1])) {
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line_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(line_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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const 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 = bb_basename(line_buffer);
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/* find the path of the module */
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modpath = strchr(line_buffer, '/'); /* ... and this is the path */
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if (!modpath)
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modpath = line_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 if ((col[-2] == '.') && (col[-1] == 'o'))
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dot = col - 2;
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mod = xstrndup(mods, dot - mods);
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/* enqueue new module */
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if (!current) {
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first = current = xzalloc(sizeof(struct dep_t));
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} else {
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current->m_next = xzalloc(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 = xstrdup(modpath);
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/*current->m_options = NULL; - xzalloc did it*/
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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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} else
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/* this line is not a dep description */
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p = NULL;
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} else
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/* It's a dep description continuation */
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p = line_buffer;
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/* p points to the first dependable module; if NULL, no dependable module */
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if (p && (p = skip_whitespace(p))[0] != '\0') {
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char *end = &line_buffer[l-1];
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const 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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/* search the end of the dependency */
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next = strchr(p, ' ');
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if (next) {
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*next = '\0';
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next--;
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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 = bb_basename(p);
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if (deps == p)
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deps = skip_whitespace(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[0] == 'o'))
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ext = 3;
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else if ((next[-1] == '.') && (next[0] == 'o'))
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ext = 2;
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/* Cope with blank lines */
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if ((next-deps-ext+1) <= 0)
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continue;
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dep = xstrndup(deps, next - deps - ext + 1);
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/* Add the new dependable module name */
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current->m_depcnt++;
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current->m_deparr = xrealloc(current->m_deparr,
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sizeof(char *) * current->m_depcnt);
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current->m_deparr[current->m_depcnt - 1] = dep;
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p = next + 2;
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} while (next < end);
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}
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/* is there other dependable module(s) ? */
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continuation_line = (line_buffer[l-1] == '\\');
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} /* while (reads(...)) */
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close(fd);
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/*
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* First parse system-specific options and aliases
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|
* as they take precedence over the kernel ones.
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|
* >=2.6: we only care about modprobe.conf
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|
* <=2.4: we care about modules.conf and conf.modules
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*/
|
|
if (ENABLE_FEATURE_2_6_MODULES
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&& (fd = open("/etc/modprobe.conf", O_RDONLY)) < 0)
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|
if (ENABLE_FEATURE_2_4_MODULES
|
|
&& (fd = open("/etc/modules.conf", O_RDONLY)) < 0)
|
|
if (ENABLE_FEATURE_2_4_MODULES)
|
|
fd = open("/etc/conf.modules", O_RDONLY);
|
|
|
|
if (fd >= 0) {
|
|
include_conf(&first, ¤t, line_buffer, sizeof(line_buffer), fd);
|
|
close(fd);
|
|
}
|
|
|
|
/* Only 2.6 has a modules.alias file */
|
|
if (ENABLE_FEATURE_2_6_MODULES) {
|
|
/* Parse kernel-declared module aliases */
|
|
filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.alias", un.release);
|
|
fd = open(filename, O_RDONLY);
|
|
if (fd < 0) {
|
|
/* Ok, that didn't work. Fall back to looking in /lib/modules */
|
|
fd = open(CONFIG_DEFAULT_MODULES_DIR"/modules.alias", O_RDONLY);
|
|
}
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
free(filename);
|
|
|
|
if (fd >= 0) {
|
|
include_conf(&first, ¤t, line_buffer, sizeof(line_buffer), fd);
|
|
close(fd);
|
|
}
|
|
|
|
/* Parse kernel-declared symbol aliases */
|
|
filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.symbols", un.release);
|
|
fd = open(filename, O_RDONLY);
|
|
if (fd < 0) {
|
|
/* Ok, that didn't work. Fall back to looking in /lib/modules */
|
|
fd = open(CONFIG_DEFAULT_MODULES_DIR"/modules.symbols", O_RDONLY);
|
|
}
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
free(filename);
|
|
|
|
if (fd >= 0) {
|
|
include_conf(&first, ¤t, line_buffer, sizeof(line_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, ret = 0;
|
|
|
|
fd = open("/proc/modules", O_RDONLY);
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
while (reads(fd, line_buffer, sizeof(line_buffer))) {
|
|
char *p;
|
|
|
|
p = strchr(line_buffer, ' ');
|
|
if (p) {
|
|
const char *n;
|
|
|
|
// Truncate buffer at first space and check for matches, with
|
|
// the idiosyncrasy that _ and - are interchangeable because the
|
|
// 2.6 kernel does weird things.
|
|
|
|
*p = '\0';
|
|
for (p = line_buffer, n = name; ; p++, n++) {
|
|
if (*p != *n) {
|
|
if ((*p == '_' || *p == '-') && (*n == '_' || *n == '-'))
|
|
continue;
|
|
break;
|
|
}
|
|
// If we made it to the end, that's a match.
|
|
if (!*p) {
|
|
ret = 1;
|
|
goto done;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
done:
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
|
|
static int mod_process(const 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 = xmalloc(6 * sizeof(char*));
|
|
if (do_insert) {
|
|
if (already_loaded(list->m_name) != 1) {
|
|
argv[argc++] = (char*)"insmod";
|
|
if (ENABLE_FEATURE_2_4_MODULES) {
|
|
if (do_syslog)
|
|
argv[argc++] = (char*)"-s";
|
|
if (autoclean)
|
|
argv[argc++] = (char*)"-k";
|
|
if (quiet)
|
|
argv[argc++] = (char*)"-q";
|
|
else if (verbose) /* verbose and quiet are mutually exclusive */
|
|
argv[argc++] = (char*)"-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 = 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++] = (char*)"rmmod";
|
|
if (do_syslog)
|
|
argv[argc++] = (char*)"-s";
|
|
argv[argc++] = (char*)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 = wait4pid(spawn(argv));
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Check the matching between a pattern and a module name.
|
|
* We need this as *_* is equivalent to *-*, even in pattern matching.
|
|
*/
|
|
static int check_pattern(const char* pat_src, const char* mod_src)
|
|
{
|
|
int ret;
|
|
|
|
if (ENABLE_FEATURE_MODPROBE_FANCY_ALIAS) {
|
|
char* pat;
|
|
char* mod;
|
|
char* p;
|
|
|
|
pat = xstrdup(pat_src);
|
|
mod = xstrdup(mod_src);
|
|
|
|
for (p = pat; (p = strchr(p, '-')); *p++ = '_');
|
|
for (p = mod; (p = strchr(p, '-')); *p++ = '_');
|
|
|
|
ret = fnmatch(pat, mod, 0);
|
|
|
|
if (ENABLE_FEATURE_CLEAN_UP) {
|
|
free(pat);
|
|
free(mod);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
return fnmatch(pat_src, mod_src, 0);
|
|
}
|
|
|
|
/*
|
|
* 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 = NULL;
|
|
char *path = NULL;
|
|
|
|
/* Search for the given module name amongst all dependency rules.
|
|
* The module name in a dependency rule can be a shell pattern,
|
|
* so try to match the given module name against such a pattern.
|
|
* Of course if the name in the dependency rule is a plain string,
|
|
* then we consider it a pattern, and matching will still work. */
|
|
for (dt = depend; dt; dt = dt->m_next) {
|
|
if (check_pattern(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 (check_pattern(adt->m_name, dt->m_deparr[0]) == 0 &&
|
|
!(ENABLE_FEATURE_MODPROBE_BLACKLIST &&
|
|
adt->m_isblacklisted))
|
|
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) == 0) {
|
|
// 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 = xzalloc(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 = NULL; /* possibly NOT done by xzalloc! */
|
|
|
|
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 = NULL;
|
|
struct mod_list_t *head = NULL;
|
|
int rc;
|
|
|
|
// get dep list for module mod
|
|
check_dep(mod, &head, &tail);
|
|
|
|
rc = 1;
|
|
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);
|
|
if (rc) {
|
|
/*
|
|
* In case of using udev, multiple instances of modprobe can be
|
|
* spawned to load the same module (think of two same usb devices,
|
|
* for example; or cold-plugging at boot time). Thus we shouldn't
|
|
* fail if the module was loaded, and not by us.
|
|
*/
|
|
if (already_loaded(mod))
|
|
rc = 0;
|
|
}
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static int mod_remove(char *mod)
|
|
{
|
|
int rc;
|
|
static const struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL };
|
|
|
|
struct mod_list_t *head = NULL;
|
|
struct mod_list_t *tail = NULL;
|
|
|
|
if (mod)
|
|
check_dep(mod, &head, &tail);
|
|
else // autoclean
|
|
head = tail = (struct mod_list_t*) &rm_a_dummy;
|
|
|
|
rc = 1;
|
|
if (head && tail)
|
|
rc = mod_process(head, 0); // process head ---> tail
|
|
return rc;
|
|
}
|
|
|
|
int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int modprobe_main(int argc, char **argv)
|
|
{
|
|
int rc = EXIT_SUCCESS;
|
|
char *unused;
|
|
|
|
opt_complementary = "q-v:v-q";
|
|
getopt32(argv, MAIN_OPT_STR, &unused, &unused);
|
|
|
|
if (option_mask32 & (DUMP_CONF_EXIT | LIST_ALL))
|
|
return EXIT_SUCCESS;
|
|
if (option_mask32 & (RESTRICT_DIR | CONFIG_FILE))
|
|
bb_error_msg_and_die("-t and -C not supported");
|
|
|
|
depend = build_dep();
|
|
|
|
if (!depend)
|
|
bb_error_msg_and_die("cannot parse "CONFIG_DEFAULT_DEPMOD_FILE);
|
|
|
|
if (remove_opt) {
|
|
do {
|
|
/* argv[optind] can be NULL here */
|
|
if (mod_remove(argv[optind])) {
|
|
bb_error_msg("failed to %s module %s", "remove",
|
|
argv[optind]);
|
|
rc = EXIT_FAILURE;
|
|
}
|
|
} while (++optind < argc);
|
|
} else {
|
|
if (optind >= argc)
|
|
bb_error_msg_and_die("no module or pattern provided");
|
|
|
|
if (mod_insert(argv[optind], argc - optind - 1, argv + optind + 1))
|
|
bb_error_msg_and_die("failed to %s module %s", "load", argv[optind]);
|
|
}
|
|
|
|
/* Here would be a good place to free up memory allocated during the dependencies build. */
|
|
|
|
return rc;
|
|
}
|