[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Modprobe written from scratch for BusyBox
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| 4 | *
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| 5 | * Copyright (c) 2002 by Robert Griebl, griebl@gmx.de
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| 6 | * Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au
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| 7 | * Copyright (c) 2005 by Jim Bauer, jfbauer@nfr.com
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| 8 | *
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| 9 | * Portions Copyright (c) 2005 by Yann E. MORIN, yann.morin.1998@anciens.enib.fr
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| 10 | *
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| 11 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 12 | */
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| 13 |
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[1765] | 14 | #include "libbb.h"
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[821] | 15 | #include <sys/utsname.h>
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| 16 | #include <fnmatch.h>
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| 17 |
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| 18 | struct mod_opt_t { /* one-way list of options to pass to a module */
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| 19 | char * m_opt_val;
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| 20 | struct mod_opt_t * m_next;
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| 21 | };
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| 22 |
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| 23 | struct dep_t { /* one-way list of dependency rules */
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| 24 | /* a dependency rule */
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[1765] | 25 | char * m_name; /* the module name*/
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| 26 | char * m_path; /* the module file path */
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| 27 | struct mod_opt_t * m_options; /* the module options */
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[821] | 28 |
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[1765] | 29 | int m_isalias : 1; /* the module is an alias */
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| 30 | int m_reserved : 15; /* stuffin' */
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[821] | 31 |
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[1765] | 32 | int m_depcnt : 16; /* the number of dependable module(s) */
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| 33 | char ** m_deparr; /* the list of dependable module(s) */
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[821] | 34 |
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[1765] | 35 | struct dep_t * m_next; /* the next dependency rule */
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[821] | 36 | };
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| 37 |
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| 38 | struct mod_list_t { /* two-way list of modules to process */
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| 39 | /* a module description */
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[1765] | 40 | const char * m_name;
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| 41 | char * m_path;
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| 42 | struct mod_opt_t * m_options;
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[821] | 43 |
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| 44 | struct mod_list_t * m_prev;
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| 45 | struct mod_list_t * m_next;
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| 46 | };
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| 47 |
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| 48 |
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| 49 | static struct dep_t *depend;
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| 50 |
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| 51 | #define main_options "acdklnqrst:vVC:"
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| 52 | #define INSERT_ALL 1 /* a */
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| 53 | #define DUMP_CONF_EXIT 2 /* c */
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| 54 | #define D_OPT_IGNORED 4 /* d */
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| 55 | #define AUTOCLEAN_FLG 8 /* k */
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| 56 | #define LIST_ALL 16 /* l */
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| 57 | #define SHOW_ONLY 32 /* n */
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| 58 | #define QUIET 64 /* q */
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| 59 | #define REMOVE_OPT 128 /* r */
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| 60 | #define DO_SYSLOG 256 /* s */
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| 61 | #define RESTRICT_DIR 512 /* t */
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| 62 | #define VERBOSE 1024 /* v */
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| 63 | #define VERSION_ONLY 2048 /* V */
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| 64 | #define CONFIG_FILE 4096 /* C */
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| 65 |
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| 66 | #define autoclean (main_opts & AUTOCLEAN_FLG)
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| 67 | #define show_only (main_opts & SHOW_ONLY)
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| 68 | #define quiet (main_opts & QUIET)
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| 69 | #define remove_opt (main_opts & REMOVE_OPT)
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| 70 | #define do_syslog (main_opts & DO_SYSLOG)
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| 71 | #define verbose (main_opts & VERBOSE)
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| 72 |
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| 73 | static int main_opts;
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| 74 |
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[1765] | 75 | static int parse_tag_value(char *buffer, char **ptag, char **pvalue)
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[821] | 76 | {
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| 77 | char *tag, *value;
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| 78 |
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[1765] | 79 | buffer = skip_whitespace(buffer);
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[821] | 80 | tag = value = buffer;
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[1765] | 81 | while (!isspace(*value))
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[821] | 82 | if (!*value) return 0;
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| 83 | else value++;
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| 84 | *value++ = 0;
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[1765] | 85 | value = skip_whitespace(value);
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[821] | 86 | if (!*value) return 0;
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| 87 |
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| 88 | *ptag = tag;
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| 89 | *pvalue = value;
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| 90 |
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| 91 | return 1;
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| 92 | }
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| 93 |
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| 94 | /*
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| 95 | * This function appends an option to a list
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| 96 | */
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[1765] | 97 | static struct mod_opt_t *append_option(struct mod_opt_t *opt_list, char *opt)
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[821] | 98 | {
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| 99 | struct mod_opt_t *ol = opt_list;
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| 100 |
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[1765] | 101 | if (ol) {
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| 102 | while (ol->m_next) {
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| 103 | ol = ol->m_next;
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[821] | 104 | }
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[1765] | 105 | ol->m_next = xmalloc(sizeof(struct mod_opt_t));
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| 106 | ol = ol->m_next;
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[821] | 107 | } else {
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[1765] | 108 | ol = opt_list = xmalloc(sizeof(struct mod_opt_t));
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[821] | 109 | }
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| 110 |
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[1765] | 111 | ol->m_opt_val = xstrdup(opt);
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| 112 | ol->m_next = NULL;
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[821] | 113 |
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| 114 | return opt_list;
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| 115 | }
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| 116 |
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| 117 | #if ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS
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[1765] | 118 | /* static char* parse_command_string(char* src, char **dst);
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[821] | 119 | * src: pointer to string containing argument
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| 120 | * dst: pointer to where to store the parsed argument
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| 121 | * return value: the pointer to the first char after the parsed argument,
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| 122 | * NULL if there was no argument parsed (only trailing spaces).
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[1765] | 123 | * Note that memory is allocated with xstrdup when a new argument was
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[821] | 124 | * parsed. Don't forget to free it!
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| 125 | */
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| 126 | #define ARG_EMPTY 0x00
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| 127 | #define ARG_IN_DQUOTES 0x01
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| 128 | #define ARG_IN_SQUOTES 0x02
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[1765] | 129 | static char *parse_command_string(char *src, char **dst)
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[821] | 130 | {
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| 131 | int opt_status = ARG_EMPTY;
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| 132 | char* tmp_str;
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| 133 |
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| 134 | /* Dumb you, I have nothing to do... */
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[1765] | 135 | if (src == NULL) return src;
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[821] | 136 |
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| 137 | /* Skip leading spaces */
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[1765] | 138 | while (*src == ' ') {
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[821] | 139 | src++;
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| 140 | }
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| 141 | /* Is the end of string reached? */
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[1765] | 142 | if (*src == '\0') {
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[821] | 143 | return NULL;
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| 144 | }
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| 145 | /* Reached the start of an argument
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| 146 | * By the way, we duplicate a little too much
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| 147 | * here but what is too much is freed later. */
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[1765] | 148 | *dst = tmp_str = xstrdup(src);
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[821] | 149 | /* Get to the end of that argument */
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[1765] | 150 | while (*tmp_str != '\0'
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| 151 | && (*tmp_str != ' ' || (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)))
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| 152 | ) {
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| 153 | switch (*tmp_str) {
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| 154 | case '\'':
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| 155 | if (opt_status & ARG_IN_DQUOTES) {
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| 156 | /* Already in double quotes, keep current char as is */
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| 157 | } else {
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| 158 | /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
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| 159 | memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
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| 160 | /* mark me: we enter or leave single quotes */
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| 161 | opt_status ^= ARG_IN_SQUOTES;
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| 162 | /* Back one char, as we need to re-scan the new char there. */
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| 163 | tmp_str--;
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| 164 | }
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[821] | 165 | break;
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[1765] | 166 | case '"':
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| 167 | if (opt_status & ARG_IN_SQUOTES) {
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| 168 | /* Already in single quotes, keep current char as is */
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| 169 | } else {
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| 170 | /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
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| 171 | memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
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| 172 | /* mark me: we enter or leave double quotes */
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| 173 | opt_status ^= ARG_IN_DQUOTES;
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| 174 | /* Back one char, as we need to re-scan the new char there. */
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| 175 | tmp_str--;
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| 176 | }
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[821] | 177 | break;
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[1765] | 178 | case '\\':
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| 179 | if (opt_status & ARG_IN_SQUOTES) {
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| 180 | /* Between single quotes: keep as is. */
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| 181 | } else {
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| 182 | switch (*(tmp_str+1)) {
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| 183 | case 'a':
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| 184 | case 'b':
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| 185 | case 't':
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| 186 | case 'n':
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| 187 | case 'v':
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| 188 | case 'f':
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| 189 | case 'r':
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| 190 | case '0':
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| 191 | /* We escaped a special character. For now, keep
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| 192 | * both the back-slash and the following char. */
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| 193 | tmp_str++; src++;
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| 194 | break;
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| 195 | default:
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| 196 | /* We escaped a space or a single or double quote,
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| 197 | * or a back-slash, or a non-escapable char. Remove
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| 198 | * the '\' and keep the new current char as is. */
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| 199 | memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
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| 200 | break;
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[821] | 201 | }
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[1765] | 202 | }
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[821] | 203 | break;
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[1765] | 204 | /* Any other char that is special shall appear here.
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| 205 | * Example: $ starts a variable
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| 206 | case '$':
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| 207 | do_variable_expansion();
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| 208 | break;
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| 209 | * */
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| 210 | default:
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| 211 | /* any other char is kept as is. */
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| 212 | break;
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[821] | 213 | }
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| 214 | tmp_str++; /* Go to next char */
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| 215 | src++; /* Go to next char to find the end of the argument. */
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| 216 | }
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| 217 | /* End of string, but still no ending quote */
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[1765] | 218 | if (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)) {
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| 219 | bb_error_msg_and_die("unterminated (single or double) quote in options list: %s", src);
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[821] | 220 | }
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| 221 | *tmp_str++ = '\0';
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[1765] | 222 | *dst = xrealloc(*dst, (tmp_str - *dst));
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[821] | 223 | return src;
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| 224 | }
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| 225 | #else
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| 226 | #define parse_command_string(src, dst) (0)
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| 227 | #endif /* ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
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| 228 |
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| 229 | /*
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| 230 | * This function reads aliases and default module options from a configuration file
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| 231 | * (/etc/modprobe.conf syntax). It supports includes (only files, no directories).
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| 232 | */
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[1765] | 233 | static void include_conf(struct dep_t **first, struct dep_t **current, char *buffer, int buflen, int fd)
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[821] | 234 | {
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| 235 | int continuation_line = 0;
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| 236 |
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[1765] | 237 | // alias parsing is not 100% correct (no correct handling of continuation lines within an alias)!
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[821] | 238 |
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[1765] | 239 | while (reads(fd, buffer, buflen)) {
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[821] | 240 | int l;
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| 241 | char *p;
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| 242 |
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[1765] | 243 | p = strchr(buffer, '#');
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| 244 | if (p)
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[821] | 245 | *p = 0;
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| 246 |
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[1765] | 247 | l = strlen(buffer);
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[821] | 248 |
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[1765] | 249 | while (l && isspace(buffer[l-1])) {
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| 250 | buffer[l-1] = 0;
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[821] | 251 | l--;
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| 252 | }
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| 253 |
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[1765] | 254 | if (l == 0) {
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[821] | 255 | continuation_line = 0;
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| 256 | continue;
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| 257 | }
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| 258 |
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[1765] | 259 | if (!continuation_line) {
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| 260 | if ((strncmp(buffer, "alias", 5) == 0) && isspace(buffer[5])) {
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[821] | 261 | char *alias, *mod;
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| 262 |
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[1765] | 263 | if (parse_tag_value(buffer + 6, &alias, &mod)) {
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[821] | 264 | /* handle alias as a module dependent on the aliased module */
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[1765] | 265 | if (!*current) {
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| 266 | (*first) = (*current) = xzalloc(sizeof(struct dep_t));
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| 267 | } else {
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| 268 | (*current)->m_next = xzalloc(sizeof(struct dep_t));
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| 269 | (*current) = (*current)->m_next;
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[821] | 270 | }
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[1765] | 271 | (*current)->m_name = xstrdup(alias);
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| 272 | (*current)->m_isalias = 1;
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[821] | 273 |
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[1765] | 274 | if ((strcmp(mod, "off") == 0) || (strcmp(mod, "null") == 0)) {
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| 275 | (*current)->m_depcnt = 0;
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| 276 | (*current)->m_deparr = 0;
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| 277 | } else {
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| 278 | (*current)->m_depcnt = 1;
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| 279 | (*current)->m_deparr = xmalloc(1 * sizeof(char *));
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| 280 | (*current)->m_deparr[0] = xstrdup(mod);
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[821] | 281 | }
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[1765] | 282 | (*current)->m_next = 0;
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[821] | 283 | }
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[1765] | 284 | } else if ((strncmp(buffer, "options", 7) == 0) && isspace(buffer[7])) {
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[821] | 285 | char *mod, *opt;
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| 286 |
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| 287 | /* split the line in the module/alias name, and options */
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[1765] | 288 | if (parse_tag_value(buffer + 8, &mod, &opt)) {
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[821] | 289 | struct dep_t *dt;
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| 290 |
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| 291 | /* find the corresponding module */
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[1765] | 292 | for (dt = *first; dt; dt = dt->m_next) {
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| 293 | if (strcmp(dt->m_name, mod) == 0)
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[821] | 294 | break;
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| 295 | }
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[1765] | 296 | if (dt) {
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| 297 | if (ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS) {
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[821] | 298 | char* new_opt = NULL;
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[1765] | 299 | while ((opt = parse_command_string(opt, &new_opt))) {
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| 300 | dt->m_options = append_option(dt->m_options, new_opt);
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[821] | 301 | }
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| 302 | } else {
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[1765] | 303 | dt->m_options = append_option(dt->m_options, opt);
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[821] | 304 | }
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| 305 | }
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| 306 | }
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[1765] | 307 | } else if ((strncmp(buffer, "include", 7) == 0) && isspace(buffer[7])) {
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| 308 | int fdi; char *filename;
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[821] | 309 |
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[1765] | 310 | filename = skip_whitespace(buffer + 8);
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[821] | 311 |
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[1765] | 312 | if ((fdi = open(filename, O_RDONLY)) >= 0) {
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[821] | 313 | include_conf(first, current, buffer, buflen, fdi);
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| 314 | close(fdi);
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| 315 | }
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| 316 | }
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| 317 | }
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| 318 | }
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| 319 | }
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| 320 |
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| 321 | /*
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[1765] | 322 | * This function builds a list of dependency rules from /lib/modules/`uname -r`/modules.dep.
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[821] | 323 | * It then fills every modules and aliases with their default options, found by parsing
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| 324 | * modprobe.conf (or modules.conf, or conf.modules).
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| 325 | */
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[1765] | 326 | static struct dep_t *build_dep(void)
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[821] | 327 | {
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| 328 | int fd;
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| 329 | struct utsname un;
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| 330 | struct dep_t *first = 0;
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| 331 | struct dep_t *current = 0;
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| 332 | char buffer[2048];
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| 333 | char *filename;
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| 334 | int continuation_line = 0;
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| 335 | int k_version;
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| 336 |
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[1765] | 337 | if (uname(&un))
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[821] | 338 | bb_error_msg_and_die("can't determine kernel version");
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| 339 |
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[1765] | 340 | k_version = 0;
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[821] | 341 | if (un.release[0] == '2') {
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| 342 | k_version = un.release[2] - '0';
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| 343 | }
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| 344 |
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[1765] | 345 | filename = xasprintf("/lib/modules/%s/modules.dep", un.release);
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| 346 | fd = open(filename, O_RDONLY);
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[821] | 347 | if (ENABLE_FEATURE_CLEAN_UP)
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| 348 | free(filename);
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| 349 | if (fd < 0) {
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| 350 | /* Ok, that didn't work. Fall back to looking in /lib/modules */
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[1765] | 351 | fd = open("/lib/modules/modules.dep", O_RDONLY);
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| 352 | if (fd < 0) {
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[821] | 353 | return 0;
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| 354 | }
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| 355 | }
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| 356 |
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[1765] | 357 | while (reads(fd, buffer, sizeof(buffer))) {
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| 358 | int l = strlen(buffer);
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[821] | 359 | char *p = 0;
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| 360 |
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[1765] | 361 | while (l > 0 && isspace(buffer[l-1])) {
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| 362 | buffer[l-1] = 0;
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[821] | 363 | l--;
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| 364 | }
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| 365 |
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[1765] | 366 | if (l == 0) {
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[821] | 367 | continuation_line = 0;
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| 368 | continue;
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| 369 | }
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| 370 |
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| 371 | /* Is this a new module dep description? */
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[1765] | 372 | if (!continuation_line) {
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[821] | 373 | /* find the dep beginning */
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[1765] | 374 | char *col = strchr(buffer, ':');
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[821] | 375 | char *dot = col;
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| 376 |
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[1765] | 377 | if (col) {
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[821] | 378 | /* This line is a dep description */
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[1765] | 379 | const char *mods;
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[821] | 380 | char *modpath;
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| 381 | char *mod;
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| 382 |
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| 383 | /* Find the beginning of the module file name */
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| 384 | *col = 0;
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[1765] | 385 | mods = bb_basename(buffer);
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[821] | 386 |
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| 387 | /* find the path of the module */
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[1765] | 388 | modpath = strchr(buffer, '/'); /* ... and this is the path */
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| 389 | if (!modpath)
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[821] | 390 | modpath = buffer; /* module with no path */
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| 391 | /* find the end of the module name in the file name */
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[1765] | 392 | if (ENABLE_FEATURE_2_6_MODULES &&
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| 393 | (k_version > 4) && (*(col-3) == '.') &&
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| 394 | (*(col-2) == 'k') && (*(col-1) == 'o'))
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[821] | 395 | dot = col - 3;
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| 396 | else
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[1765] | 397 | if ((*(col-2) == '.') && (*(col-1) == 'o'))
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[821] | 398 | dot = col - 2;
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| 399 |
|
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[1765] | 400 | mod = xstrndup(mods, dot - mods);
|
---|
[821] | 401 |
|
---|
| 402 | /* enqueue new module */
|
---|
[1765] | 403 | if (!current) {
|
---|
| 404 | first = current = xmalloc(sizeof(struct dep_t));
|
---|
| 405 | } else {
|
---|
| 406 | current->m_next = xmalloc(sizeof(struct dep_t));
|
---|
| 407 | current = current->m_next;
|
---|
[821] | 408 | }
|
---|
[1765] | 409 | current->m_name = mod;
|
---|
| 410 | current->m_path = xstrdup(modpath);
|
---|
| 411 | current->m_options = NULL;
|
---|
| 412 | current->m_isalias = 0;
|
---|
| 413 | current->m_depcnt = 0;
|
---|
| 414 | current->m_deparr = 0;
|
---|
| 415 | current->m_next = 0;
|
---|
[821] | 416 |
|
---|
| 417 | p = col + 1;
|
---|
[1765] | 418 | } else
|
---|
[821] | 419 | /* this line is not a dep description */
|
---|
| 420 | p = 0;
|
---|
[1765] | 421 | } else
|
---|
[821] | 422 | /* It's a dep description continuation */
|
---|
| 423 | p = buffer;
|
---|
| 424 |
|
---|
[1765] | 425 | while (p && *p && isblank(*p))
|
---|
[821] | 426 | p++;
|
---|
| 427 |
|
---|
| 428 | /* p points to the first dependable module; if NULL, no dependable module */
|
---|
[1765] | 429 | if (p && *p) {
|
---|
| 430 | char *end = &buffer[l-1];
|
---|
| 431 | const char *deps;
|
---|
[821] | 432 | char *dep;
|
---|
| 433 | char *next;
|
---|
| 434 | int ext = 0;
|
---|
| 435 |
|
---|
[1765] | 436 | while (isblank(*end) || (*end == '\\'))
|
---|
[821] | 437 | end--;
|
---|
| 438 |
|
---|
[1765] | 439 | do {
|
---|
[821] | 440 | /* search the end of the dependency */
|
---|
[1765] | 441 | next = strchr(p, ' ');
|
---|
| 442 | if (next) {
|
---|
[821] | 443 | *next = 0;
|
---|
| 444 | next--;
|
---|
[1765] | 445 | } else
|
---|
[821] | 446 | next = end;
|
---|
| 447 |
|
---|
| 448 | /* find the beginning of the module file name */
|
---|
[1765] | 449 | deps = bb_basename(p);
|
---|
| 450 | if (deps == p) {
|
---|
| 451 | while (isblank(*deps))
|
---|
[821] | 452 | deps++;
|
---|
| 453 | }
|
---|
| 454 |
|
---|
| 455 | /* find the end of the module name in the file name */
|
---|
[1765] | 456 | if (ENABLE_FEATURE_2_6_MODULES
|
---|
| 457 | && (k_version > 4) && (*(next-2) == '.')
|
---|
| 458 | && (*(next-1) == 'k') && (*next == 'o'))
|
---|
[821] | 459 | ext = 3;
|
---|
| 460 | else
|
---|
[1765] | 461 | if ((*(next-1) == '.') && (*next == 'o'))
|
---|
[821] | 462 | ext = 2;
|
---|
| 463 |
|
---|
| 464 | /* Cope with blank lines */
|
---|
| 465 | if ((next-deps-ext+1) <= 0)
|
---|
| 466 | continue;
|
---|
[1765] | 467 | dep = xstrndup(deps, next - deps - ext + 1);
|
---|
[821] | 468 |
|
---|
| 469 | /* Add the new dependable module name */
|
---|
[1765] | 470 | current->m_depcnt++;
|
---|
| 471 | current->m_deparr = xrealloc(current->m_deparr,
|
---|
| 472 | sizeof(char *) * current->m_depcnt);
|
---|
| 473 | current->m_deparr[current->m_depcnt - 1] = dep;
|
---|
[821] | 474 |
|
---|
| 475 | p = next + 2;
|
---|
| 476 | } while (next < end);
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 | /* is there other dependable module(s) ? */
|
---|
[1765] | 480 | if (buffer[l-1] == '\\')
|
---|
[821] | 481 | continuation_line = 1;
|
---|
| 482 | else
|
---|
| 483 | continuation_line = 0;
|
---|
| 484 | }
|
---|
[1765] | 485 | close(fd);
|
---|
[821] | 486 |
|
---|
| 487 | /*
|
---|
| 488 | * First parse system-specific options and aliases
|
---|
| 489 | * as they take precedence over the kernel ones.
|
---|
[1765] | 490 | * >=2.6: we only care about modprobe.conf
|
---|
| 491 | * <=2.4: we care about modules.conf and conf.modules
|
---|
[821] | 492 | */
|
---|
[1765] | 493 | if (ENABLE_FEATURE_2_6_MODULES
|
---|
| 494 | && (fd = open("/etc/modprobe.conf", O_RDONLY)) < 0)
|
---|
| 495 | if (ENABLE_FEATURE_2_4_MODULES
|
---|
| 496 | && (fd = open("/etc/modules.conf", O_RDONLY)) < 0)
|
---|
| 497 | if (ENABLE_FEATURE_2_4_MODULES)
|
---|
| 498 | fd = open("/etc/conf.modules", O_RDONLY);
|
---|
[821] | 499 |
|
---|
| 500 | if (fd >= 0) {
|
---|
[1765] | 501 | include_conf(&first, ¤t, buffer, sizeof(buffer), fd);
|
---|
[821] | 502 | close(fd);
|
---|
| 503 | }
|
---|
| 504 |
|
---|
| 505 | /* Only 2.6 has a modules.alias file */
|
---|
| 506 | if (ENABLE_FEATURE_2_6_MODULES) {
|
---|
[1765] | 507 | /* Parse kernel-declared module aliases */
|
---|
| 508 | filename = xasprintf("/lib/modules/%s/modules.alias", un.release);
|
---|
| 509 | fd = open(filename, O_RDONLY);
|
---|
| 510 | if (fd < 0) {
|
---|
[821] | 511 | /* Ok, that didn't work. Fall back to looking in /lib/modules */
|
---|
[1765] | 512 | fd = open("/lib/modules/modules.alias", O_RDONLY);
|
---|
[821] | 513 | }
|
---|
| 514 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 515 | free(filename);
|
---|
| 516 |
|
---|
| 517 | if (fd >= 0) {
|
---|
[1765] | 518 | include_conf(&first, ¤t, buffer, sizeof(buffer), fd);
|
---|
[821] | 519 | close(fd);
|
---|
| 520 | }
|
---|
[1765] | 521 |
|
---|
| 522 | /* Parse kernel-declared symbol aliases */
|
---|
| 523 | filename = xasprintf("/lib/modules/%s/modules.symbols", un.release);
|
---|
| 524 | fd = open(filename, O_RDONLY);
|
---|
| 525 | if (fd < 0) {
|
---|
| 526 | /* Ok, that didn't work. Fall back to looking in /lib/modules */
|
---|
| 527 | fd = open("/lib/modules/modules.symbols", O_RDONLY);
|
---|
| 528 | }
|
---|
| 529 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 530 | free(filename);
|
---|
| 531 |
|
---|
| 532 | if (fd >= 0) {
|
---|
| 533 | include_conf(&first, ¤t, buffer, sizeof(buffer), fd);
|
---|
| 534 | close(fd);
|
---|
| 535 | }
|
---|
[821] | 536 | }
|
---|
| 537 |
|
---|
| 538 | return first;
|
---|
| 539 | }
|
---|
| 540 |
|
---|
| 541 | /* return 1 = loaded, 0 = not loaded, -1 = can't tell */
|
---|
[1765] | 542 | static int already_loaded(const char *name)
|
---|
[821] | 543 | {
|
---|
| 544 | int fd, ret = 0;
|
---|
| 545 | char buffer[4096];
|
---|
| 546 |
|
---|
[1765] | 547 | fd = open("/proc/modules", O_RDONLY);
|
---|
[821] | 548 | if (fd < 0)
|
---|
| 549 | return -1;
|
---|
| 550 |
|
---|
[1765] | 551 | while (reads(fd, buffer, sizeof(buffer))) {
|
---|
[821] | 552 | char *p;
|
---|
| 553 |
|
---|
| 554 | p = strchr (buffer, ' ');
|
---|
| 555 | if (p) {
|
---|
| 556 | const char *n;
|
---|
| 557 |
|
---|
| 558 | // Truncate buffer at first space and check for matches, with
|
---|
| 559 | // the idiosyncrasy that _ and - are interchangeable because the
|
---|
| 560 | // 2.6 kernel does weird things.
|
---|
| 561 |
|
---|
| 562 | *p = 0;
|
---|
| 563 | for (p = buffer, n = name; ; p++, n++) {
|
---|
| 564 | if (*p != *n) {
|
---|
| 565 | if ((*p == '_' || *p == '-') && (*n == '_' || *n == '-'))
|
---|
| 566 | continue;
|
---|
| 567 | break;
|
---|
| 568 | }
|
---|
| 569 | // If we made it to the end, that's a match.
|
---|
| 570 | if (!*p) {
|
---|
| 571 | ret = 1;
|
---|
| 572 | goto done;
|
---|
| 573 | }
|
---|
| 574 | }
|
---|
| 575 | }
|
---|
| 576 | }
|
---|
| 577 | done:
|
---|
| 578 | close (fd);
|
---|
| 579 | return ret;
|
---|
| 580 | }
|
---|
| 581 |
|
---|
[1765] | 582 | static int mod_process(const struct mod_list_t *list, int do_insert)
|
---|
[821] | 583 | {
|
---|
| 584 | int rc = 0;
|
---|
| 585 | char **argv = NULL;
|
---|
| 586 | struct mod_opt_t *opts;
|
---|
| 587 | int argc_malloc; /* never used when CONFIG_FEATURE_CLEAN_UP not defined */
|
---|
| 588 | int argc;
|
---|
| 589 |
|
---|
[1765] | 590 | while (list) {
|
---|
[821] | 591 | argc = 0;
|
---|
[1765] | 592 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
[821] | 593 | argc_malloc = 0;
|
---|
| 594 | /* If CONFIG_FEATURE_CLEAN_UP is not defined, then we leak memory
|
---|
| 595 | * each time we allocate memory for argv.
|
---|
| 596 | * But it is (quite) small amounts of memory that leak each
|
---|
| 597 | * time a module is loaded, and it is reclaimed when modprobe
|
---|
| 598 | * exits anyway (even when standalone shell?).
|
---|
| 599 | * This could become a problem when loading a module with LOTS of
|
---|
| 600 | * dependencies, with LOTS of options for each dependencies, with
|
---|
| 601 | * very little memory on the target... But in that case, the module
|
---|
| 602 | * would not load because there is no more memory, so there's no
|
---|
| 603 | * problem. */
|
---|
| 604 | /* enough for minimal insmod (5 args + NULL) or rmmod (3 args + NULL) */
|
---|
[1765] | 605 | argv = xmalloc(6 * sizeof(char*));
|
---|
| 606 | if (do_insert) {
|
---|
| 607 | if (already_loaded(list->m_name) != 1) {
|
---|
| 608 | argv[argc++] = (char*)"insmod";
|
---|
[821] | 609 | if (ENABLE_FEATURE_2_4_MODULES) {
|
---|
| 610 | if (do_syslog)
|
---|
[1765] | 611 | argv[argc++] = (char*)"-s";
|
---|
[821] | 612 | if (autoclean)
|
---|
[1765] | 613 | argv[argc++] = (char*)"-k";
|
---|
[821] | 614 | if (quiet)
|
---|
[1765] | 615 | argv[argc++] = (char*)"-q";
|
---|
| 616 | else if (verbose) /* verbose and quiet are mutually exclusive */
|
---|
| 617 | argv[argc++] = (char*)"-v";
|
---|
[821] | 618 | }
|
---|
[1765] | 619 | argv[argc++] = list->m_path;
|
---|
| 620 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
[821] | 621 | argc_malloc = argc;
|
---|
[1765] | 622 | opts = list->m_options;
|
---|
| 623 | while (opts) {
|
---|
[821] | 624 | /* Add one more option */
|
---|
| 625 | argc++;
|
---|
[1765] | 626 | argv = xrealloc(argv,(argc + 1)* sizeof(char*));
|
---|
| 627 | argv[argc-1] = opts->m_opt_val;
|
---|
| 628 | opts = opts->m_next;
|
---|
[821] | 629 | }
|
---|
| 630 | }
|
---|
| 631 | } else {
|
---|
| 632 | /* modutils uses short name for removal */
|
---|
[1765] | 633 | if (already_loaded(list->m_name) != 0) {
|
---|
| 634 | argv[argc++] = (char*)"rmmod";
|
---|
[821] | 635 | if (do_syslog)
|
---|
[1765] | 636 | argv[argc++] = (char*)"-s";
|
---|
| 637 | argv[argc++] = (char*)list->m_name;
|
---|
| 638 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
[821] | 639 | argc_malloc = argc;
|
---|
| 640 | }
|
---|
| 641 | }
|
---|
| 642 | argv[argc] = NULL;
|
---|
| 643 |
|
---|
| 644 | if (argc) {
|
---|
| 645 | if (verbose) {
|
---|
[1765] | 646 | printf("%s module %s\n", do_insert?"Loading":"Unloading", list->m_name);
|
---|
[821] | 647 | }
|
---|
| 648 | if (!show_only) {
|
---|
[1765] | 649 | int rc2 = wait4pid(spawn(argv));
|
---|
[902] | 650 |
|
---|
[821] | 651 | if (do_insert) {
|
---|
| 652 | rc = rc2; /* only last module matters */
|
---|
[1765] | 653 | } else if (!rc2) {
|
---|
[821] | 654 | rc = 0; /* success if remove any mod */
|
---|
| 655 | }
|
---|
| 656 | }
|
---|
[1765] | 657 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
[821] | 658 | /* the last value in the array has index == argc, but
|
---|
| 659 | * it is the terminating NULL, so we must not free it. */
|
---|
[1765] | 660 | while (argc_malloc < argc) {
|
---|
| 661 | free(argv[argc_malloc++]);
|
---|
| 662 | }
|
---|
[821] | 663 | }
|
---|
| 664 | }
|
---|
[1765] | 665 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
| 666 | free(argv);
|
---|
[821] | 667 | argv = NULL;
|
---|
| 668 | }
|
---|
[1765] | 669 | list = do_insert ? list->m_prev : list->m_next;
|
---|
[821] | 670 | }
|
---|
| 671 | return (show_only) ? 0 : rc;
|
---|
| 672 | }
|
---|
| 673 |
|
---|
| 674 | /*
|
---|
[1765] | 675 | * Check the matching between a pattern and a module name.
|
---|
| 676 | * We need this as *_* is equivalent to *-*, even in pattern matching.
|
---|
| 677 | */
|
---|
| 678 | static int check_pattern(const char* pat_src, const char* mod_src)
|
---|
| 679 | {
|
---|
| 680 | int ret;
|
---|
| 681 |
|
---|
| 682 | if (ENABLE_FEATURE_MODPROBE_FANCY_ALIAS) {
|
---|
| 683 | char* pat;
|
---|
| 684 | char* mod;
|
---|
| 685 | char* p;
|
---|
| 686 |
|
---|
| 687 | pat = xstrdup(pat_src);
|
---|
| 688 | mod = xstrdup(mod_src);
|
---|
| 689 |
|
---|
| 690 | for (p = pat; (p = strchr(p, '-')); *p++ = '_');
|
---|
| 691 | for (p = mod; (p = strchr(p, '-')); *p++ = '_');
|
---|
| 692 |
|
---|
| 693 | ret = fnmatch(pat, mod, 0);
|
---|
| 694 |
|
---|
| 695 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
| 696 | free(pat);
|
---|
| 697 | free(mod);
|
---|
| 698 | }
|
---|
| 699 |
|
---|
| 700 | return ret;
|
---|
| 701 | } else {
|
---|
| 702 | return fnmatch(pat_src, mod_src, 0);
|
---|
| 703 | }
|
---|
| 704 | }
|
---|
| 705 |
|
---|
| 706 | /*
|
---|
[821] | 707 | * Builds the dependency list (aka stack) of a module.
|
---|
| 708 | * head: the highest module in the stack (last to insmod, first to rmmod)
|
---|
| 709 | * tail: the lowest module in the stack (first to insmod, last to rmmod)
|
---|
| 710 | */
|
---|
[1765] | 711 | static void check_dep(char *mod, struct mod_list_t **head, struct mod_list_t **tail)
|
---|
[821] | 712 | {
|
---|
| 713 | struct mod_list_t *find;
|
---|
| 714 | struct dep_t *dt;
|
---|
| 715 | struct mod_opt_t *opt = 0;
|
---|
| 716 | char *path = 0;
|
---|
| 717 |
|
---|
| 718 | /* Search for the given module name amongst all dependency rules.
|
---|
| 719 | * The module name in a dependency rule can be a shell pattern,
|
---|
| 720 | * so try to match the given module name against such a pattern.
|
---|
| 721 | * Of course if the name in the dependency rule is a plain string,
|
---|
| 722 | * then we consider it a pattern, and matching will still work. */
|
---|
[1765] | 723 | for (dt = depend; dt; dt = dt->m_next) {
|
---|
| 724 | if (check_pattern(dt->m_name, mod) == 0) {
|
---|
[821] | 725 | break;
|
---|
| 726 | }
|
---|
| 727 | }
|
---|
| 728 |
|
---|
[1765] | 729 | if (!dt) {
|
---|
| 730 | bb_error_msg("module %s not found", mod);
|
---|
[821] | 731 | return;
|
---|
| 732 | }
|
---|
| 733 |
|
---|
| 734 | // resolve alias names
|
---|
[1765] | 735 | while (dt->m_isalias) {
|
---|
| 736 | if (dt->m_depcnt == 1) {
|
---|
[821] | 737 | struct dep_t *adt;
|
---|
| 738 |
|
---|
[1765] | 739 | for (adt = depend; adt; adt = adt->m_next) {
|
---|
| 740 | if (check_pattern(adt->m_name, dt->m_deparr[0]) == 0)
|
---|
[821] | 741 | break;
|
---|
| 742 | }
|
---|
[1765] | 743 | if (adt) {
|
---|
[821] | 744 | /* This is the module we are aliased to */
|
---|
[1765] | 745 | struct mod_opt_t *opts = dt->m_options;
|
---|
[821] | 746 | /* Option of the alias are appended to the options of the module */
|
---|
[1765] | 747 | while (opts) {
|
---|
| 748 | adt->m_options = append_option(adt->m_options, opts->m_opt_val);
|
---|
| 749 | opts = opts->m_next;
|
---|
[821] | 750 | }
|
---|
| 751 | dt = adt;
|
---|
[1765] | 752 | } else {
|
---|
| 753 | bb_error_msg("module %s not found", mod);
|
---|
[821] | 754 | return;
|
---|
| 755 | }
|
---|
[1765] | 756 | } else {
|
---|
| 757 | bb_error_msg("bad alias %s", dt->m_name);
|
---|
[821] | 758 | return;
|
---|
| 759 | }
|
---|
| 760 | }
|
---|
| 761 |
|
---|
[1765] | 762 | mod = dt->m_name;
|
---|
| 763 | path = dt->m_path;
|
---|
| 764 | opt = dt->m_options;
|
---|
[821] | 765 |
|
---|
| 766 | // search for duplicates
|
---|
[1765] | 767 | for (find = *head; find; find = find->m_next) {
|
---|
| 768 | if (!strcmp(mod, find->m_name)) {
|
---|
| 769 | // found ->dequeue it
|
---|
[821] | 770 |
|
---|
[1765] | 771 | if (find->m_prev)
|
---|
| 772 | find->m_prev->m_next = find->m_next;
|
---|
[821] | 773 | else
|
---|
[1765] | 774 | *head = find->m_next;
|
---|
[821] | 775 |
|
---|
[1765] | 776 | if (find->m_next)
|
---|
| 777 | find->m_next->m_prev = find->m_prev;
|
---|
[821] | 778 | else
|
---|
[1765] | 779 | *tail = find->m_prev;
|
---|
[821] | 780 |
|
---|
| 781 | break; // there can be only one duplicate
|
---|
| 782 | }
|
---|
| 783 | }
|
---|
| 784 |
|
---|
[1765] | 785 | if (!find) { // did not find a duplicate
|
---|
| 786 | find = xmalloc(sizeof(struct mod_list_t));
|
---|
| 787 | find->m_name = mod;
|
---|
| 788 | find->m_path = path;
|
---|
| 789 | find->m_options = opt;
|
---|
[821] | 790 | }
|
---|
| 791 |
|
---|
| 792 | // enqueue at tail
|
---|
[1765] | 793 | if (*tail)
|
---|
| 794 | (*tail)->m_next = find;
|
---|
| 795 | find->m_prev = *tail;
|
---|
| 796 | find->m_next = 0;
|
---|
[821] | 797 |
|
---|
[1765] | 798 | if (!*head)
|
---|
[821] | 799 | *head = find;
|
---|
| 800 | *tail = find;
|
---|
| 801 |
|
---|
[1765] | 802 | if (dt) {
|
---|
[821] | 803 | int i;
|
---|
| 804 |
|
---|
| 805 | /* Add all dependable module for that new module */
|
---|
[1765] | 806 | for (i = 0; i < dt->m_depcnt; i++)
|
---|
| 807 | check_dep(dt->m_deparr[i], head, tail);
|
---|
[821] | 808 | }
|
---|
| 809 | }
|
---|
| 810 |
|
---|
[1765] | 811 | static int mod_insert(char *mod, int argc, char **argv)
|
---|
[821] | 812 | {
|
---|
[1765] | 813 | struct mod_list_t *tail = NULL;
|
---|
| 814 | struct mod_list_t *head = NULL;
|
---|
[821] | 815 | int rc;
|
---|
| 816 |
|
---|
| 817 | // get dep list for module mod
|
---|
[1765] | 818 | check_dep(mod, &head, &tail);
|
---|
[821] | 819 |
|
---|
[1765] | 820 | rc = 1;
|
---|
| 821 | if (head && tail) {
|
---|
| 822 | if (argc) {
|
---|
[821] | 823 | int i;
|
---|
| 824 | // append module args
|
---|
[1765] | 825 | for (i = 0; i < argc; i++)
|
---|
| 826 | head->m_options = append_option(head->m_options, argv[i]);
|
---|
[821] | 827 | }
|
---|
| 828 |
|
---|
| 829 | // process tail ---> head
|
---|
[1765] | 830 | rc = mod_process(tail, 1);
|
---|
| 831 | if (rc) {
|
---|
[902] | 832 | /*
|
---|
| 833 | * In case of using udev, multiple instances of modprobe can be
|
---|
| 834 | * spawned to load the same module (think of two same usb devices,
|
---|
| 835 | * for example; or cold-plugging at boot time). Thus we shouldn't
|
---|
| 836 | * fail if the module was loaded, and not by us.
|
---|
| 837 | */
|
---|
[1765] | 838 | if (already_loaded(mod))
|
---|
[902] | 839 | rc = 0;
|
---|
| 840 | }
|
---|
[821] | 841 | }
|
---|
| 842 | return rc;
|
---|
| 843 | }
|
---|
| 844 |
|
---|
[1765] | 845 | static int mod_remove(char *mod)
|
---|
[821] | 846 | {
|
---|
| 847 | int rc;
|
---|
[1765] | 848 | static const struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL };
|
---|
[821] | 849 |
|
---|
[1765] | 850 | struct mod_list_t *head = NULL;
|
---|
| 851 | struct mod_list_t *tail = NULL;
|
---|
[821] | 852 |
|
---|
[1765] | 853 | if (mod)
|
---|
| 854 | check_dep(mod, &head, &tail);
|
---|
[821] | 855 | else // autoclean
|
---|
[1765] | 856 | head = tail = (struct mod_list_t*) &rm_a_dummy;
|
---|
[821] | 857 |
|
---|
[1765] | 858 | rc = 1;
|
---|
| 859 | if (head && tail)
|
---|
| 860 | rc = mod_process(head, 0); // process head ---> tail
|
---|
[821] | 861 | return rc;
|
---|
| 862 | }
|
---|
| 863 |
|
---|
[1765] | 864 | int modprobe_main(int argc, char** argv);
|
---|
[821] | 865 | int modprobe_main(int argc, char** argv)
|
---|
| 866 | {
|
---|
| 867 | int rc = EXIT_SUCCESS;
|
---|
| 868 | char *unused;
|
---|
| 869 |
|
---|
[1765] | 870 | opt_complementary = "?V-:q-v:v-q";
|
---|
| 871 | main_opts = getopt32(argv, "acdklnqrst:vVC:",
|
---|
[821] | 872 | &unused, &unused);
|
---|
[1765] | 873 | if (main_opts & (DUMP_CONF_EXIT | LIST_ALL))
|
---|
| 874 | return EXIT_SUCCESS;
|
---|
| 875 | if (main_opts & (RESTRICT_DIR | CONFIG_FILE))
|
---|
| 876 | bb_error_msg_and_die("-t and -C not supported");
|
---|
[821] | 877 |
|
---|
[1765] | 878 | depend = build_dep();
|
---|
[821] | 879 |
|
---|
[1765] | 880 | if (!depend)
|
---|
| 881 | bb_error_msg_and_die("cannot parse modules.dep");
|
---|
[821] | 882 |
|
---|
| 883 | if (remove_opt) {
|
---|
| 884 | do {
|
---|
[1765] | 885 | if (mod_remove(optind < argc ?
|
---|
| 886 | argv[optind] : NULL)) {
|
---|
| 887 | bb_error_msg("failed to remove module %s",
|
---|
| 888 | argv[optind]);
|
---|
[821] | 889 | rc = EXIT_FAILURE;
|
---|
| 890 | }
|
---|
[1765] | 891 | } while (++optind < argc);
|
---|
[821] | 892 | } else {
|
---|
| 893 | if (optind >= argc)
|
---|
[1765] | 894 | bb_error_msg_and_die("no module or pattern provided");
|
---|
[821] | 895 |
|
---|
[1765] | 896 | if (mod_insert(argv[optind], argc - optind - 1, argv + optind + 1))
|
---|
| 897 | bb_error_msg_and_die("failed to load module %s", argv[optind]);
|
---|
[821] | 898 | }
|
---|
| 899 |
|
---|
| 900 | /* Here would be a good place to free up memory allocated during the dependencies build. */
|
---|
| 901 |
|
---|
| 902 | return rc;
|
---|
| 903 | }
|
---|