hush/modutils/modprobe.c

953 lines
25 KiB
C
Raw Normal View History

/* vi: set sw=4 ts=4: */
/*
* Modprobe written from scratch for BusyBox
*
* Copyright (c) 2002 by Robert Griebl, griebl@gmx.de
* Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au
* Copyright (c) 2005 by Jim Bauer, jfbauer@nfr.com
*
* Portions Copyright (c) 2005 by Yann E. MORIN, yann.morin.1998@anciens.enib.fr
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
#include <sys/utsname.h>
#include <fnmatch.h>
#define line_buffer bb_common_bufsiz1
struct mod_opt_t { /* one-way list of options to pass to a module */
char * m_opt_val;
struct mod_opt_t * m_next;
};
struct dep_t { /* one-way list of dependency rules */
/* a dependency rule */
char * m_name; /* the module name*/
char * m_path; /* the module file path */
struct mod_opt_t * m_options; /* the module options */
unsigned int m_isalias :1; /* the module is an alias */
unsigned int m_isblacklisted:1; /* the module is blacklisted */
unsigned int m_reserved :14; /* stuffin' */
unsigned int m_depcnt :16; /* the number of dependable module(s) */
char ** m_deparr; /* the list of dependable module(s) */
2003-12-24 20:30:45 +00:00
struct dep_t * m_next; /* the next dependency rule */
};
struct mod_list_t { /* two-way list of modules to process */
/* a module description */
const char * m_name;
char * m_path;
struct mod_opt_t * m_options;
2003-12-24 20:30:45 +00:00
struct mod_list_t * m_prev;
struct mod_list_t * m_next;
};
struct include_conf_t {
struct dep_t *first;
struct dep_t *current;
};
static struct dep_t *depend;
#define MAIN_OPT_STR "acdklnqrst:vVC:"
#define INSERT_ALL 1 /* a */
#define DUMP_CONF_EXIT 2 /* c */
#define D_OPT_IGNORED 4 /* d */
#define AUTOCLEAN_FLG 8 /* k */
#define LIST_ALL 16 /* l */
#define SHOW_ONLY 32 /* n */
#define QUIET 64 /* q */
#define REMOVE_OPT 128 /* r */
#define DO_SYSLOG 256 /* s */
#define RESTRICT_DIR 512 /* t */
#define VERBOSE 1024 /* v */
#define VERSION_ONLY 2048 /* V */
#define CONFIG_FILE 4096 /* C */
#define autoclean (option_mask32 & AUTOCLEAN_FLG)
#define show_only (option_mask32 & SHOW_ONLY)
#define quiet (option_mask32 & QUIET)
#define remove_opt (option_mask32 & REMOVE_OPT)
#define do_syslog (option_mask32 & DO_SYSLOG)
#define verbose (option_mask32 & VERBOSE)
2006-10-27 15:12:50 +00:00
static int parse_tag_value(char *buffer, char **ptag, char **pvalue)
{
char *tag, *value;
2006-10-27 15:12:50 +00:00
buffer = skip_whitespace(buffer);
tag = value = buffer;
while (!isspace(*value)) {
if (!*value)
return 0;
value++;
}
*value++ = '\0';
2006-10-27 15:12:50 +00:00
value = skip_whitespace(value);
if (!*value)
return 0;
*ptag = tag;
*pvalue = value;
2003-12-24 20:30:45 +00:00
return 1;
}
/*
* This function appends an option to a list
*/
2006-10-27 15:12:50 +00:00
static struct mod_opt_t *append_option(struct mod_opt_t *opt_list, char *opt)
{
struct mod_opt_t *ol = opt_list;
2006-10-27 15:12:50 +00:00
if (ol) {
while (ol->m_next) {
ol = ol->m_next;
}
ol->m_next = xzalloc(sizeof(struct mod_opt_t));
2006-10-27 15:12:50 +00:00
ol = ol->m_next;
} else {
ol = opt_list = xzalloc(sizeof(struct mod_opt_t));
}
2006-10-27 15:12:50 +00:00
ol->m_opt_val = xstrdup(opt);
/*ol->m_next = NULL; - done by xzalloc*/
return opt_list;
}
#if ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS
2006-10-27 15:12:50 +00:00
/* static char* parse_command_string(char* src, char **dst);
* src: pointer to string containing argument
* dst: pointer to where to store the parsed argument
* return value: the pointer to the first char after the parsed argument,
* NULL if there was no argument parsed (only trailing spaces).
* Note that memory is allocated with xstrdup when a new argument was
* parsed. Don't forget to free it!
*/
#define ARG_EMPTY 0x00
#define ARG_IN_DQUOTES 0x01
#define ARG_IN_SQUOTES 0x02
2006-10-27 15:12:50 +00:00
static char *parse_command_string(char *src, char **dst)
{
int opt_status = ARG_EMPTY;
char* tmp_str;
/* Dumb you, I have nothing to do... */
2006-10-27 15:12:50 +00:00
if (src == NULL) return src;
/* Skip leading spaces */
2006-10-27 15:12:50 +00:00
while (*src == ' ') {
src++;
}
/* Is the end of string reached? */
2006-10-27 15:12:50 +00:00
if (*src == '\0') {
return NULL;
}
/* Reached the start of an argument
* By the way, we duplicate a little too much
* here but what is too much is freed later. */
2006-10-27 15:12:50 +00:00
*dst = tmp_str = xstrdup(src);
/* Get to the end of that argument */
2006-10-27 15:12:50 +00:00
while (*tmp_str != '\0'
&& (*tmp_str != ' ' || (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)))
) {
switch (*tmp_str) {
case '\'':
if (opt_status & ARG_IN_DQUOTES) {
/* Already in double quotes, keep current char as is */
} else {
/* shift left 1 char, until end of string: get rid of the opening/closing quotes */
memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
/* mark me: we enter or leave single quotes */
opt_status ^= ARG_IN_SQUOTES;
/* Back one char, as we need to re-scan the new char there. */
tmp_str--;
}
break;
2006-10-27 15:12:50 +00:00
case '"':
if (opt_status & ARG_IN_SQUOTES) {
/* Already in single quotes, keep current char as is */
} else {
/* shift left 1 char, until end of string: get rid of the opening/closing quotes */
memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
/* mark me: we enter or leave double quotes */
opt_status ^= ARG_IN_DQUOTES;
/* Back one char, as we need to re-scan the new char there. */
tmp_str--;
}
break;
2006-10-27 15:12:50 +00:00
case '\\':
if (opt_status & ARG_IN_SQUOTES) {
/* Between single quotes: keep as is. */
} else {
switch (*(tmp_str+1)) {
case 'a':
case 'b':
case 't':
case 'n':
case 'v':
case 'f':
case 'r':
case '0':
/* We escaped a special character. For now, keep
* both the back-slash and the following char. */
tmp_str++;
src++;
2006-10-27 15:12:50 +00:00
break;
default:
/* We escaped a space or a single or double quote,
* or a back-slash, or a non-escapable char. Remove
* the '\' and keep the new current char as is. */
memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
break;
}
2006-10-27 15:12:50 +00:00
}
break;
/* Any other char that is special shall appear here.
* Example: $ starts a variable
case '$':
do_variable_expansion();
break;
* */
default:
/* any other char is kept as is. */
break;
}
tmp_str++; /* Go to next char */
src++; /* Go to next char to find the end of the argument. */
}
/* End of string, but still no ending quote */
2006-10-27 15:12:50 +00:00
if (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)) {
bb_error_msg_and_die("unterminated (single or double) quote in options list: %s", src);
}
*tmp_str++ = '\0';
2006-10-27 15:12:50 +00:00
*dst = xrealloc(*dst, (tmp_str - *dst));
return src;
}
2005-12-15 07:42:13 +00:00
#else
#define parse_command_string(src, dst) (0)
#endif /* ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
static int is_conf_command(char *buffer, const char *command)
{
int len = strlen(command);
return ((strstr(buffer, command) == buffer) &&
isspace(buffer[len]));
}
/*
* This function reads aliases and default module options from a configuration file
* (/etc/modprobe.conf syntax). It supports includes (only files, no directories).
*/
static int FAST_FUNC include_conf_file_act(const char *filename,
struct stat *statbuf UNUSED_PARAM,
void *userdata,
int depth UNUSED_PARAM);
static int FAST_FUNC include_conf_dir_act(const char *filename UNUSED_PARAM,
struct stat *statbuf UNUSED_PARAM,
void *userdata UNUSED_PARAM,
int depth)
{
if (depth > 1)
return SKIP;
return TRUE;
}
static int include_conf_recursive(struct include_conf_t *conf, const char *filename)
{
return recursive_action(filename, ACTION_RECURSE,
include_conf_file_act,
include_conf_dir_act,
conf, 1);
}
static int FAST_FUNC include_conf_file_act(const char *filename,
struct stat *statbuf UNUSED_PARAM,
void *userdata,
int depth UNUSED_PARAM)
{
struct include_conf_t *conf = (struct include_conf_t *) userdata;
struct dep_t **first = &conf->first;
struct dep_t **current = &conf->current;
int continuation_line = 0;
FILE *f;
if (bb_basename(filename)[0] == '.')
return TRUE;
f = fopen_for_read(filename);
if (f == NULL)
return FALSE;
// alias parsing is not 100% correct (no correct handling of continuation lines within an alias)!
while (fgets(line_buffer, sizeof(line_buffer), f)) {
int l;
*strchrnul(line_buffer, '#') = '\0';
l = strlen(line_buffer);
while (l && isspace(line_buffer[l-1])) {
line_buffer[l-1] = '\0';
l--;
}
2006-10-27 15:12:50 +00:00
if (l == 0) {
continuation_line = 0;
continue;
}
if (continuation_line)
continue;
if (is_conf_command(line_buffer, "alias")) {
char *alias, *mod;
if (parse_tag_value(line_buffer + 6, &alias, &mod)) {
/* handle alias as a module dependent on the aliased module */
if (!*current) {
(*first) = (*current) = xzalloc(sizeof(struct dep_t));
} else {
(*current)->m_next = xzalloc(sizeof(struct dep_t));
(*current) = (*current)->m_next;
}
(*current)->m_name = xstrdup(alias);
(*current)->m_isalias = 1;
if ((strcmp(mod, "off") == 0) || (strcmp(mod, "null") == 0)) {
/*(*current)->m_depcnt = 0; - done by xzalloc */
/*(*current)->m_deparr = 0;*/
} else {
(*current)->m_depcnt = 1;
(*current)->m_deparr = xmalloc(sizeof(char *));
(*current)->m_deparr[0] = xstrdup(mod);
}
/*(*current)->m_next = NULL; - done by xzalloc */
}
} else if (is_conf_command(line_buffer, "options")) {
char *mod, *opt;
/* split the line in the module/alias name, and options */
if (parse_tag_value(line_buffer + 8, &mod, &opt)) {
struct dep_t *dt;
/* find the corresponding module */
for (dt = *first; dt; dt = dt->m_next) {
if (strcmp(dt->m_name, mod) == 0)
break;
}
if (dt) {
if (ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS) {
char* new_opt = NULL;
while ((opt = parse_command_string(opt, &new_opt))) {
dt->m_options = append_option(dt->m_options, new_opt);
}
} else {
dt->m_options = append_option(dt->m_options, opt);
}
}
}
} else if (is_conf_command(line_buffer, "include")) {
char *includefile;
includefile = skip_whitespace(line_buffer + 8);
include_conf_recursive(conf, includefile);
} else if (ENABLE_FEATURE_MODPROBE_BLACKLIST &&
(is_conf_command(line_buffer, "blacklist"))) {
char *mod;
struct dep_t *dt;
mod = skip_whitespace(line_buffer + 10);
for (dt = *first; dt; dt = dt->m_next) {
if (strcmp(dt->m_name, mod) == 0)
break;
}
if (dt)
dt->m_isblacklisted = 1;
}
} /* while (fgets(...)) */
fclose(f);
return TRUE;
}
static int include_conf_file(struct include_conf_t *conf,
const char *filename)
{
return include_conf_file_act(filename, NULL, conf, 0);
}
static int include_conf_file2(struct include_conf_t *conf,
const char *filename, const char *oldname)
{
if (include_conf_file(conf, filename) == TRUE)
return TRUE;
return include_conf_file(conf, oldname);
}
/*
2007-02-08 06:30:58 +00:00
* This function builds a list of dependency rules from /lib/modules/`uname -r`/modules.dep.
* It then fills every modules and aliases with their default options, found by parsing
* modprobe.conf (or modules.conf, or conf.modules).
*/
2006-10-27 15:12:50 +00:00
static struct dep_t *build_dep(void)
{
FILE *f;
struct utsname un;
struct include_conf_t conf = { NULL, NULL };
char *filename;
int continuation_line = 0;
int k_version;
2003-12-24 20:30:45 +00:00
uname(&un); /* never fails */
2003-12-24 20:30:45 +00:00
2006-10-27 15:12:50 +00:00
k_version = 0;
if (un.release[0] == '2') {
k_version = un.release[2] - '0';
}
2003-12-24 20:30:45 +00:00
filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/"CONFIG_DEFAULT_DEPMOD_FILE, un.release);
f = fopen_for_read(filename);
if (ENABLE_FEATURE_CLEAN_UP)
free(filename);
if (f == NULL) {
/* Ok, that didn't work. Fall back to looking in /lib/modules */
f = fopen_for_read(CONFIG_DEFAULT_MODULES_DIR"/"CONFIG_DEFAULT_DEPMOD_FILE);
if (f == NULL) {
bb_error_msg_and_die("cannot parse "CONFIG_DEFAULT_DEPMOD_FILE);
}
}
while (fgets(line_buffer, sizeof(line_buffer), f)) {
int l = strlen(line_buffer);
char *p = NULL;
2003-12-24 20:30:45 +00:00
while (l > 0 && isspace(line_buffer[l-1])) {
line_buffer[l-1] = '\0';
l--;
}
2003-12-24 20:30:45 +00:00
2006-10-27 15:12:50 +00:00
if (l == 0) {
continuation_line = 0;
continue;
}
2003-12-24 20:30:45 +00:00
/* Is this a new module dep description? */
2006-10-27 15:12:50 +00:00
if (!continuation_line) {
/* find the dep beginning */
char *col = strchr(line_buffer, ':');
char *dot = col;
2003-12-24 20:30:45 +00:00
2006-10-27 15:12:50 +00:00
if (col) {
/* This line is a dep description */
const char *mods;
char *modpath;
char *mod;
2003-12-24 20:30:45 +00:00
/* Find the beginning of the module file name */
*col = '\0';
mods = bb_basename(line_buffer);
2003-12-24 20:30:45 +00:00
/* find the path of the module */
modpath = strchr(line_buffer, '/'); /* ... and this is the path */
2006-10-27 15:12:50 +00:00
if (!modpath)
modpath = line_buffer; /* module with no path */
/* find the end of the module name in the file name */
2006-10-27 15:12:50 +00:00
if (ENABLE_FEATURE_2_6_MODULES &&
(k_version > 4) && (col[-3] == '.') &&
(col[-2] == 'k') && (col[-1] == 'o'))
dot = col - 3;
else if ((col[-2] == '.') && (col[-1] == 'o'))
dot = col - 2;
2003-12-24 20:30:45 +00:00
2006-10-27 15:12:50 +00:00
mod = xstrndup(mods, dot - mods);
2003-12-24 20:30:45 +00:00
/* enqueue new module */
if (!conf.current) {
conf.first = conf.current = xzalloc(sizeof(struct dep_t));
2007-02-08 06:30:58 +00:00
} else {
conf.current->m_next = xzalloc(sizeof(struct dep_t));
conf.current = conf.current->m_next;
}
conf.current->m_name = mod;
conf.current->m_path = xstrdup(modpath);
/*current->m_options = NULL; - xzalloc did it*/
/*current->m_isalias = 0;*/
/*current->m_depcnt = 0;*/
/*current->m_deparr = 0;*/
/*current->m_next = 0;*/
2003-12-24 20:30:45 +00:00
2004-01-10 11:29:31 +00:00
p = col + 1;
2007-02-08 06:30:58 +00:00
} else
/* this line is not a dep description */
p = NULL;
2007-02-08 06:30:58 +00:00
} else
/* It's a dep description continuation */
p = line_buffer;
2003-12-24 20:30:45 +00:00
/* p points to the first dependable module; if NULL, no dependable module */
if (p && (p = skip_whitespace(p))[0] != '\0') {
char *end = &line_buffer[l-1];
const char *deps;
char *dep;
char *next;
int ext = 0;
2003-12-24 20:30:45 +00:00
2006-10-27 15:12:50 +00:00
while (isblank(*end) || (*end == '\\'))
end--;
2003-12-24 20:30:45 +00:00
2006-10-27 15:12:50 +00:00
do {
/* search the end of the dependency */
2006-10-27 15:12:50 +00:00
next = strchr(p, ' ');
if (next) {
*next = '\0';
next--;
2007-02-08 06:30:58 +00:00
} else
next = end;
/* find the beginning of the module file name */
deps = bb_basename(p);
if (deps == p)
deps = skip_whitespace(deps);
2003-12-24 20:30:45 +00:00
/* find the end of the module name in the file name */
2006-10-27 15:12:50 +00:00
if (ENABLE_FEATURE_2_6_MODULES
&& (k_version > 4) && (next[-2] == '.')
&& (next[-1] == 'k') && (next[0] == 'o'))
2004-01-10 11:29:31 +00:00
ext = 3;
else if ((next[-1] == '.') && (next[0] == 'o'))
ext = 2;
2004-01-10 11:29:31 +00:00
/* Cope with blank lines */
if ((next - deps - ext + 1) <= 0)
2004-01-10 11:29:31 +00:00
continue;
2006-10-27 15:12:50 +00:00
dep = xstrndup(deps, next - deps - ext + 1);
2003-12-24 20:30:45 +00:00
/* Add the new dependable module name */
conf.current->m_deparr = xrealloc_vector(conf.current->m_deparr, 2, conf.current->m_depcnt);
conf.current->m_deparr[conf.current->m_depcnt++] = dep;
2003-12-24 20:30:45 +00:00
2004-01-10 11:29:31 +00:00
p = next + 2;
} while (next < end);
}
2003-12-24 20:30:45 +00:00
/* is there other dependable module(s) ? */
continuation_line = (line_buffer[l-1] == '\\');
} /* while (fgets(...)) */
fclose(f);
/*
* First parse system-specific options and aliases
* as they take precedence over the kernel ones.
* >=2.6: we only care about modprobe.conf
* <=2.4: we care about modules.conf and conf.modules
*/
{
int r = FALSE;
if (ENABLE_FEATURE_2_6_MODULES) {
if (include_conf_file(&conf, "/etc/modprobe.conf"))
r = TRUE;
if (include_conf_recursive(&conf, "/etc/modprobe.d"))
r = TRUE;
}
if (ENABLE_FEATURE_2_4_MODULES && !r)
include_conf_file2(&conf,
"/etc/modules.conf",
"/etc/conf.modules");
}
2003-12-24 20:30:45 +00:00
/* 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);
include_conf_file2(&conf,
filename,
CONFIG_DEFAULT_MODULES_DIR"/modules.alias");
if (ENABLE_FEATURE_CLEAN_UP)
free(filename);
/* Parse kernel-declared symbol aliases */
filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.symbols", un.release);
include_conf_file2(&conf,
filename,
CONFIG_DEFAULT_MODULES_DIR"/modules.symbols");
if (ENABLE_FEATURE_CLEAN_UP)
free(filename);
}
2003-12-24 20:30:45 +00:00
return conf.first;
}
/* return 1 = loaded, 0 = not loaded, -1 = can't tell */
2006-10-27 15:12:50 +00:00
static int already_loaded(const char *name)
{
FILE *f;
int ret;
f = fopen_for_read("/proc/modules");
if (f == NULL)
return -1;
ret = 0;
while (fgets(line_buffer, sizeof(line_buffer), f)) {
char *p = line_buffer;
const char *n = name;
while (1) {
char cn = *n;
char cp = *p;
if (cp == ' ' || cp == '\0') {
if (cn == '\0') {
ret = 1; /* match! */
goto done;
}
break; /* no match on this line, take next one */
}
if (cn == '-') cn = '_';
if (cp == '-') cp = '_';
if (cp != cn)
break; /* no match on this line, take next one */
n++;
p++;
}
}
done:
fclose(f);
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;
2006-10-27 15:12:50 +00:00
while (list) {
argc = 0;
2006-10-27 15:12:50 +00:00
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? Yes --vda).
* 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) */
2006-10-27 15:12:50 +00:00
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";
2006-10-27 15:12:50 +00:00
else if (verbose) /* verbose and quiet are mutually exclusive */
argv[argc++] = (char*)"-v";
}
2006-10-27 15:12:50 +00:00
argv[argc++] = list->m_path;
if (ENABLE_FEATURE_CLEAN_UP)
argc_malloc = argc;
2006-10-27 15:12:50 +00:00
opts = list->m_options;
while (opts) {
/* Add one more option */
argc++;
argv = xrealloc(argv, (argc + 1) * sizeof(char*));
2006-10-27 15:12:50 +00:00
argv[argc-1] = opts->m_opt_val;
opts = opts->m_next;
}
}
} else {
/* modutils uses short name for removal */
2006-10-27 15:12:50 +00:00
if (already_loaded(list->m_name) != 0) {
argv[argc++] = (char*)"rmmod";
if (do_syslog)
argv[argc++] = (char*)"-s";
argv[argc++] = (char*)list->m_name;
2006-10-27 15:12:50 +00:00
if (ENABLE_FEATURE_CLEAN_UP)
argc_malloc = argc;
}
}
argv[argc] = NULL;
2003-12-24 20:30:45 +00:00
if (argc) {
if (verbose) {
2006-10-27 15:12:50 +00:00
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 */
2007-02-08 06:30:58 +00:00
} else if (!rc2) {
rc = 0; /* success if remove any mod */
}
}
2006-10-27 15:12:50 +00:00
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. */
2006-10-27 15:12:50 +00:00
while (argc_malloc < argc) {
free(argv[argc_malloc++]);
}
}
}
2006-10-27 15:12:50 +00:00
if (ENABLE_FEATURE_CLEAN_UP) {
free(argv);
argv = NULL;
}
2006-10-27 15:12:50 +00:00
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.
*/
2007-04-16 22:32:04 +00:00
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;
2007-04-11 17:04:29 +00:00
pat = xstrdup(pat_src);
mod = xstrdup(mod_src);
2006-10-27 15:12:50 +00:00
for (p = pat; (p = strchr(p, '-')); *p++ = '_');
for (p = mod; (p = strchr(p, '-')); *p++ = '_');
2006-10-27 15:12:50 +00:00
ret = fnmatch(pat, mod, 0);
if (ENABLE_FEATURE_CLEAN_UP) {
2007-04-10 15:42:06 +00:00
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)
*/
2006-10-27 15:12:50 +00:00
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. */
2006-10-27 15:12:50 +00:00
for (dt = depend; dt; dt = dt->m_next) {
if (check_pattern(dt->m_name, mod) == 0) {
break;
}
}
2003-12-24 20:30:45 +00:00
2006-10-27 15:12:50 +00:00
if (!dt) {
bb_error_msg("module %s not found", mod);
return;
}
// resolve alias names
2006-10-27 15:12:50 +00:00
while (dt->m_isalias) {
if (dt->m_depcnt == 1) {
struct dep_t *adt;
2003-12-24 20:30:45 +00:00
2006-10-27 15:12:50 +00:00
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;
}
2006-10-27 15:12:50 +00:00
if (adt) {
/* This is the module we are aliased to */
2006-10-27 15:12:50 +00:00
struct mod_opt_t *opts = dt->m_options;
/* Option of the alias are appended to the options of the module */
2006-10-27 15:12:50 +00:00
while (opts) {
adt->m_options = append_option(adt->m_options, opts->m_opt_val);
opts = opts->m_next;
}
2004-01-10 11:29:31 +00:00
dt = adt;
2007-02-08 06:30:58 +00:00
} else {
2006-10-27 15:12:50 +00:00
bb_error_msg("module %s not found", mod);
return;
}
2007-02-08 06:30:58 +00:00
} else {
2006-10-27 15:12:50 +00:00
bb_error_msg("bad alias %s", dt->m_name);
2004-01-10 11:29:31 +00:00
return;
}
}
2003-12-24 20:30:45 +00:00
2006-10-27 15:12:50 +00:00
mod = dt->m_name;
path = dt->m_path;
opt = dt->m_options;
// search for duplicates
2006-10-27 15:12:50 +00:00
for (find = *head; find; find = find->m_next) {
if (strcmp(mod, find->m_name) == 0) {
// found -> dequeue it
2006-10-27 15:12:50 +00:00
if (find->m_prev)
find->m_prev->m_next = find->m_next;
else
2006-10-27 15:12:50 +00:00
*head = find->m_next;
2003-12-24 20:30:45 +00:00
2006-10-27 15:12:50 +00:00
if (find->m_next)
find->m_next->m_prev = find->m_prev;
else
2006-10-27 15:12:50 +00:00
*tail = find->m_prev;
2003-12-24 20:30:45 +00:00
break; // there can be only one duplicate
2004-01-10 11:29:31 +00:00
}
}
2006-10-27 15:12:50 +00:00
if (!find) { // did not find a duplicate
find = xzalloc(sizeof(struct mod_list_t));
2006-10-27 15:12:50 +00:00
find->m_name = mod;
find->m_path = path;
find->m_options = opt;
}
2004-01-10 11:29:31 +00:00
// enqueue at tail
2006-10-27 15:12:50 +00:00
if (*tail)
(*tail)->m_next = find;
find->m_prev = *tail;
find->m_next = NULL; /* possibly NOT done by xzalloc! */
2006-10-27 15:12:50 +00:00
if (!*head)
*head = find;
*tail = find;
2003-12-24 20:30:45 +00:00
2006-10-27 15:12:50 +00:00
if (dt) {
int i;
2003-12-24 20:30:45 +00:00
/* Add all dependable module for that new module */
2006-10-27 15:12:50 +00:00
for (i = 0; i < dt->m_depcnt; i++)
check_dep(dt->m_deparr[i], head, tail);
}
}
static int mod_insert(char **argv)
{
struct mod_list_t *tail = NULL;
struct mod_list_t *head = NULL;
char *modname = *argv++;
int rc;
2003-12-24 20:30:45 +00:00
// get dep list for module mod
check_dep(modname, &head, &tail);
2003-12-24 20:30:45 +00:00
rc = 1;
2006-10-27 15:12:50 +00:00
if (head && tail) {
while (*argv)
head->m_options = append_option(head->m_options, *argv++);
2003-12-24 20:30:45 +00:00
// 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(modname))
rc = 0;
}
}
return rc;
}
static int mod_remove(char *modname)
{
static const struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL };
2003-12-24 20:30:45 +00:00
int rc;
struct mod_list_t *head = NULL;
struct mod_list_t *tail = NULL;
2003-12-24 20:30:45 +00:00
if (modname)
check_dep(modname, &head, &tail);
else // autoclean
head = tail = (struct mod_list_t*) &rm_a_dummy;
2003-12-24 20:30:45 +00:00
rc = 1;
2006-10-27 15:12:50 +00:00
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 UNUSED_PARAM, char **argv)
{
int rc = EXIT_SUCCESS;
unsigned opt;
char *unused;
opt_complementary = "q-v:v-q";
opt = getopt32(argv, MAIN_OPT_STR, &unused, &unused);
argv += optind;
if (opt & (DUMP_CONF_EXIT | LIST_ALL))
2006-10-27 15:12:50 +00:00
return EXIT_SUCCESS;
if (opt & (RESTRICT_DIR | CONFIG_FILE))
2006-10-27 15:12:50 +00:00
bb_error_msg_and_die("-t and -C not supported");
2003-12-24 20:30:45 +00:00
2006-10-27 15:12:50 +00:00
depend = build_dep();
2006-10-27 15:12:50 +00:00
if (!depend)
bb_error_msg_and_die("cannot parse "CONFIG_DEFAULT_DEPMOD_FILE);
2003-12-24 20:30:45 +00:00
if (remove_opt) {
do {
/* (*argv) can be NULL here */
if (mod_remove(*argv)) {
bb_perror_msg("failed to %s module %s", "remove",
*argv);
rc = EXIT_FAILURE;
}
} while (*argv && *++argv);
} else {
if (!*argv)
2006-10-27 15:12:50 +00:00
bb_error_msg_and_die("no module or pattern provided");
2003-12-24 20:30:45 +00:00
if (mod_insert(argv))
bb_perror_msg_and_die("failed to %s module %s", "load", *argv);
}
/* Here would be a good place to free up memory allocated during the dependencies build. */
2003-12-24 20:30:45 +00:00
return rc;
}