*
* 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
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * 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 <getopt.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <string.h>
-#include <ctype.h>
-#include <fcntl.h>
-#include "busybox.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 {
- char * m_module;
- char * m_options;
+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 */
- int m_isalias : 1;
- int m_reserved : 15;
+ 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' */
- int m_depcnt : 16;
- char ** m_deparr;
+ unsigned int m_depcnt :16; /* the number of dependable module(s) */
+ char ** m_deparr; /* the list of dependable module(s) */
- struct dep_t * m_next;
+ struct dep_t * m_next; /* the next dependency rule */
};
-struct mod_list_t {
- char * m_module;
- char * m_options;
+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;
struct mod_list_t * m_prev;
struct mod_list_t * m_next;
static struct dep_t *depend;
-static int autoclean, show_only, quiet, do_syslog, verbose;
-static int k_version;
-int parse_tag_value ( char *buffer, char **ptag, char **pvalue )
+#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)
+
+static int parse_tag_value(char *buffer, char **ptag, char **pvalue)
{
char *tag, *value;
- while ( isspace ( *buffer ))
- buffer++;
+ buffer = skip_whitespace(buffer);
tag = value = buffer;
- while ( !isspace ( *value ))
- if (!*value) return 0;
- else value++;
- *value++ = 0;
- while ( isspace ( *value ))
+ while (!isspace(*value)) {
+ if (!*value)
+ return 0;
value++;
- if (!*value) return 0;
+ }
+ *value++ = '\0';
+ value = skip_whitespace(value);
+ if (!*value)
+ return 0;
*ptag = tag;
*pvalue = value;
return 1;
}
-/* Jump through hoops to simulate how fgets() grabs just one line at a
- * time... Don't use any stdio since modprobe gets called from a kernel
- * thread and stdio junk can overflow the limited stack...
+/*
+ * This function appends an option to a list
*/
-static char *reads ( int fd, char *buffer, size_t len )
+static struct mod_opt_t *append_option(struct mod_opt_t *opt_list, char *opt)
{
- int n = read ( fd, buffer, len );
+ struct mod_opt_t *ol = opt_list;
- if ( n > 0 ) {
- char *p;
+ if (ol) {
+ while (ol->m_next) {
+ ol = ol->m_next;
+ }
+ ol->m_next = xzalloc(sizeof(struct mod_opt_t));
+ ol = ol->m_next;
+ } else {
+ ol = opt_list = xzalloc(sizeof(struct mod_opt_t));
+ }
+
+ ol->m_opt_val = xstrdup(opt);
+ /*ol->m_next = NULL; - done by xzalloc*/
- buffer [len-1] = 0;
- p = strchr ( buffer, '\n' );
+ return opt_list;
+}
- if ( p ) {
- off_t offset;
+#if ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS
+/* static char* parse_command_string(char* src, char **dst);
+ * src: pointer to string containing argument
+ * dst: pointer to where to store the parsed argument
+ * return value: the pointer to the first char after the parsed argument,
+ * NULL if there was no argument parsed (only trailing spaces).
+ * Note that memory is allocated with xstrdup when a new argument was
+ * parsed. Don't forget to free it!
+ */
+#define ARG_EMPTY 0x00
+#define ARG_IN_DQUOTES 0x01
+#define ARG_IN_SQUOTES 0x02
+static char *parse_command_string(char *src, char **dst)
+{
+ int opt_status = ARG_EMPTY;
+ char* tmp_str;
- offset = lseek ( fd, 0L, SEEK_CUR ); // Get the current file descriptor offset
- lseek ( fd, offset-n + (p-buffer) + 1, SEEK_SET ); // Set the file descriptor offset to right after the \n
+ /* Dumb you, I have nothing to do... */
+ if (src == NULL) return src;
- p[1] = 0;
+ /* Skip leading spaces */
+ while (*src == ' ') {
+ src++;
+ }
+ /* Is the end of string reached? */
+ if (*src == '\0') {
+ return NULL;
+ }
+ /* Reached the start of an argument
+ * By the way, we duplicate a little too much
+ * here but what is too much is freed later. */
+ *dst = tmp_str = xstrdup(src);
+ /* Get to the end of that argument */
+ while (*tmp_str != '\0'
+ && (*tmp_str != ' ' || (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)))
+ ) {
+ switch (*tmp_str) {
+ case '\'':
+ if (opt_status & ARG_IN_DQUOTES) {
+ /* Already in double quotes, keep current char as is */
+ } else {
+ /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
+ memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
+ /* mark me: we enter or leave single quotes */
+ opt_status ^= ARG_IN_SQUOTES;
+ /* Back one char, as we need to re-scan the new char there. */
+ tmp_str--;
+ }
+ break;
+ case '"':
+ if (opt_status & ARG_IN_SQUOTES) {
+ /* Already in single quotes, keep current char as is */
+ } else {
+ /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
+ memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
+ /* mark me: we enter or leave double quotes */
+ opt_status ^= ARG_IN_DQUOTES;
+ /* Back one char, as we need to re-scan the new char there. */
+ tmp_str--;
+ }
+ break;
+ case '\\':
+ if (opt_status & ARG_IN_SQUOTES) {
+ /* Between single quotes: keep as is. */
+ } else {
+ switch (*(tmp_str+1)) {
+ case 'a':
+ case 'b':
+ case 't':
+ case 'n':
+ case 'v':
+ case 'f':
+ case 'r':
+ case '0':
+ /* We escaped a special character. For now, keep
+ * both the back-slash and the following char. */
+ tmp_str++;
+ src++;
+ break;
+ default:
+ /* We escaped a space or a single or double quote,
+ * or a back-slash, or a non-escapable char. Remove
+ * the '\' and keep the new current char as is. */
+ memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
+ break;
+ }
+ }
+ break;
+ /* Any other char that is special shall appear here.
+ * Example: $ starts a variable
+ case '$':
+ do_variable_expansion();
+ break;
+ * */
+ default:
+ /* any other char is kept as is. */
+ break;
}
- return buffer;
+ tmp_str++; /* Go to next char */
+ src++; /* Go to next char to find the end of the argument. */
}
+ /* End of string, but still no ending quote */
+ if (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)) {
+ bb_error_msg_and_die("unterminated (single or double) quote in options list: %s", src);
+ }
+ *tmp_str++ = '\0';
+ *dst = xrealloc(*dst, (tmp_str - *dst));
+ return src;
+}
+#else
+#define parse_command_string(src, dst) (0)
+#endif /* ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
- else
- return 0;
+static int is_conf_command(char *buffer, const char *command)
+{
+ int len = strlen(command);
+ return ((strstr(buffer, command) == buffer) &&
+ isspace(buffer[len]));
}
-static struct dep_t *build_dep ( void )
+/*
+ * This function reads aliases and default module options from a configuration file
+ * (/etc/modprobe.conf syntax). It supports includes (only files, no directories).
+ */
+static void include_conf(struct dep_t **first, struct dep_t **current, char *buffer, int buflen, int fd)
+{
+ int continuation_line = 0;
+
+ // alias parsing is not 100% correct (no correct handling of continuation lines within an alias)!
+
+ while (reads(fd, buffer, buflen)) {
+ int l;
+
+ *strchrnul(buffer, '#') = '\0';
+
+ l = strlen(buffer);
+
+ while (l && isspace(buffer[l-1])) {
+ buffer[l-1] = '\0';
+ l--;
+ }
+
+ if (l == 0) {
+ continuation_line = 0;
+ continue;
+ }
+
+ if (continuation_line)
+ continue;
+
+ if (is_conf_command(buffer, "alias")) {
+ char *alias, *mod;
+
+ if (parse_tag_value(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(buffer, "options")) {
+ char *mod, *opt;
+
+ /* split the line in the module/alias name, and options */
+ if (parse_tag_value(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(buffer, "include")) {
+ int fdi;
+ char *filename;
+
+ filename = skip_whitespace(buffer + 8);
+ fdi = open(filename, O_RDONLY);
+ if (fdi >= 0) {
+ include_conf(first, current, buffer, buflen, fdi);
+ close(fdi);
+ }
+ } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST &&
+ (is_conf_command(buffer, "blacklist"))) {
+ char *mod;
+ struct dep_t *dt;
+
+ mod = skip_whitespace(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 (reads(...)) */
+}
+
+/*
+ * 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).
+ */
+static struct dep_t *build_dep(void)
{
int fd;
struct utsname un;
- struct dep_t *first = 0;
- struct dep_t *current = 0;
- char buffer[256];
- char *filename = buffer;
+ struct dep_t *first = NULL;
+ struct dep_t *current = NULL;
+ char *filename;
int continuation_line = 0;
+ int k_version;
- k_version = 0;
- if ( uname ( &un ))
- return 0;
+ if (uname(&un))
+ bb_error_msg_and_die("can't determine kernel version");
- // check for buffer overflow in following code
- if ( bb_strlen ( un.release ) > ( sizeof( buffer ) - 64 )) {
- return 0;
- }
+ k_version = 0;
if (un.release[0] == '2') {
k_version = un.release[2] - '0';
}
- strcpy ( filename, "/lib/modules/" );
- strcat ( filename, un.release );
- strcat ( filename, "/modules.dep" );
-
- if (( fd = open ( filename, O_RDONLY )) < 0 ) {
-
+ filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/"CONFIG_DEFAULT_DEPMOD_FILE, un.release);
+ fd = open(filename, O_RDONLY);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(filename);
+ if (fd < 0) {
/* Ok, that didn't work. Fall back to looking in /lib/modules */
- if (( fd = open ( "/lib/modules/modules.dep", O_RDONLY )) < 0 ) {
- return 0;
+ fd = open(CONFIG_DEFAULT_MODULES_DIR"/"CONFIG_DEFAULT_DEPMOD_FILE, O_RDONLY);
+ if (fd < 0) {
+ bb_error_msg_and_die("cannot parse " CONFIG_DEFAULT_DEPMOD_FILE);
}
}
- while ( reads ( fd, buffer, sizeof( buffer ))) {
- int l = bb_strlen ( buffer );
+ while (reads(fd, line_buffer, sizeof(line_buffer))) {
+ int l = strlen(line_buffer);
char *p = 0;
- while ( isspace ( buffer [l-1] )) {
- buffer [l-1] = 0;
+ while (l > 0 && isspace(line_buffer[l-1])) {
+ line_buffer[l-1] = '\0';
l--;
}
- if ( l == 0 ) {
+ if (l == 0) {
continuation_line = 0;
continue;
}
- if ( !continuation_line ) {
- char *col = strchr ( buffer, ':' );
+ /* Is this a new module dep description? */
+ if (!continuation_line) {
+ /* find the dep beginning */
+ char *col = strchr(line_buffer, ':');
+ char *dot = col;
- if ( col ) {
- char *mods;
+ if (col) {
+ /* This line is a dep description */
+ const char *mods;
+ char *modpath;
char *mod;
- int ext = 0;
-
- *col = 0;
- mods = strrchr ( buffer, '/' );
-
- if ( !mods )
- mods = buffer;
- else
- mods++;
-
-#if defined(CONFIG_FEATURE_2_6_MODULES)
- if ((k_version > 4) && ( *(col-3) == '.' ) &&
- ( *(col-2) == 'k' ) && ( *(col-1) == 'o' ))
- ext = 3;
- else
-#endif
- if (( *(col-2) == '.' ) && ( *(col-1) == 'o' ))
- ext = 2;
-
- mod = bb_xstrndup ( buffer, col - buffer );
- if ( !current ) {
- first = current = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
+ /* Find the beginning of the module file name */
+ *col = '\0';
+ mods = bb_basename(line_buffer);
+
+ /* find the path of the module */
+ modpath = strchr(line_buffer, '/'); /* ... and this is the path */
+ if (!modpath)
+ modpath = line_buffer; /* module with no path */
+ /* find the end of the module name in the file name */
+ 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;
+
+ mod = xstrndup(mods, dot - mods);
+
+ /* enqueue new module */
+ if (!current) {
+ first = current = xzalloc(sizeof(struct dep_t));
+ } else {
+ current->m_next = xzalloc(sizeof(struct dep_t));
+ current = current->m_next;
}
- else {
- current-> m_next = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
- current = current-> m_next;
- }
- current-> m_module = mod;
- current-> m_options = 0;
- current-> m_isalias = 0;
- current-> m_depcnt = 0;
- current-> m_deparr = 0;
- current-> m_next = 0;
-
- //printf ( "%s:\n", mod );
- p = col + 1;
- }
- else
- p = 0;
- }
- else
- p = buffer;
-
- while ( p && *p && isblank(*p))
- p++;
+ current->m_name = mod;
+ 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;*/
- if ( p && *p ) {
- char *end = &buffer [l-1];
- char *deps;
+ p = col + 1;
+ } else
+ /* this line is not a dep description */
+ p = NULL;
+ } else
+ /* It's a dep description continuation */
+ p = line_buffer;
+
+ /* 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;
- while ( isblank ( *end ) || ( *end == '\\' ))
+ while (isblank(*end) || (*end == '\\'))
end--;
- do
- {
- next = strchr (p, ' ' );
- if (next)
- {
- *next = 0;
+ do {
+ /* search the end of the dependency */
+ next = strchr(p, ' ');
+ if (next) {
+ *next = '\0';
next--;
- }
- else
+ } else
next = end;
- deps = strrchr ( p, '/' );
-
- if ( !deps || ( deps < p )) {
- deps = p;
-
- while ( isblank ( *deps ))
- deps++;
- }
- else
- deps++;
+ /* find the beginning of the module file name */
+ deps = bb_basename(p);
+ if (deps == p)
+ deps = skip_whitespace(deps);
-#if defined(CONFIG_FEATURE_2_6_MODULES)
- if ((k_version > 4) && ( *(next-2) == '.' ) && *(next-1) == 'k' &&
- ( *next == 'o' ))
+ /* find the end of the module name in the file name */
+ if (ENABLE_FEATURE_2_6_MODULES
+ && (k_version > 4) && (next[-2] == '.')
+ && (next[-1] == 'k') && (next[0] == 'o'))
ext = 3;
- else
-#endif
- if (( *(next-1) == '.' ) && ( *next == 'o' ))
- ext = 2;
+ else if ((next[-1] == '.') && (next[0] == 'o'))
+ ext = 2;
/* Cope with blank lines */
if ((next-deps-ext+1) <= 0)
continue;
- dep = bb_xstrndup ( deps, next - deps - ext + 1 );
+ dep = xstrndup(deps, next - deps - ext + 1);
- current-> m_depcnt++;
- current-> m_deparr = (char **) xrealloc ( current-> m_deparr,
- sizeof ( char *) * current-> m_depcnt );
- current-> m_deparr [current-> m_depcnt - 1] = dep;
+ /* Add the new dependable module name */
+ current->m_deparr = xrealloc_vector(current->m_deparr, 2, current->m_depcnt);
+ current->m_deparr[current->m_depcnt++] = dep;
- //printf ( " %d) %s\n", current-> m_depcnt, current-> m_deparr [current-> m_depcnt -1] );
p = next + 2;
} while (next < end);
}
- if ( buffer [l-1] == '\\' )
- continuation_line = 1;
- else
- continuation_line = 0;
+ /* is there other dependable module(s) ? */
+ continuation_line = (line_buffer[l-1] == '\\');
+ } /* while (reads(...)) */
+ close(fd);
+
+ /*
+ * 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
+ */
+ if (ENABLE_FEATURE_2_6_MODULES
+ && (fd = open("/etc/modprobe.conf", O_RDONLY)) < 0)
+ 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);
}
- close ( fd );
-
- // alias parsing is not 100% correct (no correct handling of continuation lines within an alias) !
-
-#if defined(CONFIG_FEATURE_2_6_MODULES)
- if (( fd = open ( "/etc/modprobe.conf", O_RDONLY )) < 0 )
-#endif
- if (( fd = open ( "/etc/modules.conf", O_RDONLY )) < 0 )
- if (( fd = open ( "/etc/conf.modules", O_RDONLY )) < 0 )
- return first;
-
- continuation_line = 0;
- while ( reads ( fd, buffer, sizeof( buffer ))) {
- int l;
- char *p;
- p = strchr ( buffer, '#' );
- if ( p )
- *p = 0;
-
- l = bb_strlen ( buffer );
-
- while ( l && isspace ( buffer [l-1] )) {
- buffer [l-1] = 0;
- l--;
+ /* 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 ( l == 0 ) {
- continuation_line = 0;
- continue;
+ if (fd >= 0) {
+ include_conf(&first, ¤t, line_buffer, sizeof(line_buffer), fd);
+ close(fd);
}
- if ( !continuation_line ) {
- if (( strncmp ( buffer, "alias", 5 ) == 0 ) && isspace ( buffer [5] )) {
- char *alias, *mod;
-
- if ( parse_tag_value ( buffer + 6, &alias, &mod )) {
- // fprintf ( stderr, "ALIAS: '%s' -> '%s'\n", alias, mod );
-
- if ( !current ) {
- first = current = (struct dep_t *) xcalloc ( 1, sizeof ( struct dep_t ));
- }
- else {
- current-> m_next = (struct dep_t *) xcalloc ( 1, sizeof ( struct dep_t ));
- current = current-> m_next;
- }
- current-> m_module = bb_xstrdup ( alias );
- current-> m_isalias = 1;
-
- if (( strcmp ( mod, "off" ) == 0 ) || ( strcmp ( mod, "null" ) == 0 )) {
- current-> m_depcnt = 0;
- current-> m_deparr = 0;
- }
- else {
- current-> m_depcnt = 1;
- current-> m_deparr = xmalloc ( 1 * sizeof( char * ));
- current-> m_deparr[0] = bb_xstrdup ( mod );
- }
- current-> m_next = 0;
- }
- }
- else if (( strncmp ( buffer, "options", 7 ) == 0 ) && isspace ( buffer [7] )) {
- char *mod, *opt;
-
- if ( parse_tag_value ( buffer + 8, &mod, &opt )) {
- struct dep_t *dt;
-
- for ( dt = first; dt; dt = dt-> m_next ) {
- if ( strcmp ( dt-> m_module, mod ) == 0 )
- break;
- }
- if ( dt ) {
- dt-> m_options = xrealloc ( dt-> m_options, bb_strlen( opt ) + 1 );
- strcpy ( dt-> m_options, opt );
+ /* 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);
- // fprintf ( stderr, "OPTION: '%s' -> '%s'\n", dt-> m_module, dt-> m_options );
- }
- }
- }
+ if (fd >= 0) {
+ include_conf(&first, ¤t, line_buffer, sizeof(line_buffer), fd);
+ close(fd);
}
}
- close ( fd );
return first;
}
-/* check if /lib/modules/bar/foo.ko belongs to module foo */
-/* return 1 = found, 0 = not found */
-static int mod_strcmp ( const char *mod_path, const char *mod_name )
-{
-#if defined(CONFIG_FEATURE_2_6_MODULES)
-#define MODULE_EXTENSION ".ko"
-#define MOD_EXTENSION_LEN 3
-#else
-#define MODULE_EXTENSION ".o"
-#define MOD_EXTENSION_LEN 2
-#endif
- /* last path component */
- const char *last_comp = strrchr (mod_path, '/');
-
- return (strncmp(last_comp ? last_comp + 1 : mod_path,
- mod_name,
- strlen(mod_name)) == 0 ) &&
- (strcmp(mod_path + strlen(mod_path) -
- MOD_EXTENSION_LEN, MODULE_EXTENSION) == 0);
-}
-
/* return 1 = loaded, 0 = not loaded, -1 = can't tell */
-static int already_loaded (const char *name)
+static int already_loaded(const char *name)
{
- int fd;
- char buffer[256];
+ int fd, ret = 0;
- fd = open ("/proc/modules", O_RDONLY);
+ fd = open("/proc/modules", O_RDONLY);
if (fd < 0)
return -1;
- while ( reads ( fd, buffer, sizeof( buffer ))) {
+ while (reads(fd, line_buffer, sizeof(line_buffer))) {
char *p;
- p = strchr (buffer, ' ');
+ p = strchr(line_buffer, ' ');
if (p) {
- *p = 0;
- if (mod_strcmp (name, buffer)) {
- close (fd);
- return 1;
+ 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;
+ }
}
}
}
-
- close (fd);
- return 0;
+ done:
+ close(fd);
+ return ret;
}
-static int mod_process ( struct mod_list_t *list, int do_insert )
+static int mod_process(const struct mod_list_t *list, int do_insert)
{
- char lcmd [256];
int rc = 0;
-
- while ( list ) {
- *lcmd = '\0';
- if ( do_insert ) {
- if (already_loaded (list->m_module) != 1)
- snprintf ( lcmd, sizeof( lcmd ) - 1, "insmod %s %s %s %s %s",
- do_syslog ? "-s" : "", autoclean ? "-k" : "",
- quiet ? "-q" : "", list-> m_module, list-> m_options ?
- list-> m_options : "" );
+ 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 {
- if (already_loaded (list->m_module) != 0)
- snprintf ( lcmd, sizeof( lcmd ) - 1, "rmmod %s %s",
- do_syslog ? "-s" : "", list-> m_module );
+ /* 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 ( verbose )
- printf ( "%s\n", lcmd );
- if ( !show_only && *lcmd) {
- int rc2 = system ( lcmd );
- if (do_insert) rc = rc2; /* only last module matters */
- else if (!rc2) rc = 0; /* success if remove any mod */
- }
+ if (argc) {
+ if (verbose) {
+ printf("%s module %s\n", do_insert?"Loading":"Unloading", list->m_name);
+ }
+ if (!show_only) {
+ int rc2 = wait4pid(spawn(argv));
- list = do_insert ? list-> m_prev : list-> m_next;
+ 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;
}
-static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t **tail )
+/*
+ * 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;
- char *opt = 0;
- int lm;
-
- // remove .o extension
- lm = bb_strlen ( mod );
-
-#if defined(CONFIG_FEATURE_2_6_MODULES)
- if ((k_version > 4) && ( mod [lm-3] == '.' ) &&
- ( mod [lm-2] == 'k' ) && ( mod [lm-1] == 'o' ))
- mod [lm-3] = 0;
- else
-#endif
- if (( mod [lm-2] == '.' ) && ( mod [lm-1] == 'o' ))
- mod [lm-2] = 0;
-
- // check dependencies
- for ( dt = depend; dt; dt = dt-> m_next ) {
- if ( mod_strcmp ( dt-> m_module, mod )) {
- mod = dt-> m_module;
- opt = dt-> m_options;
+ 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 && dt-> m_isalias ) {
- if ( dt-> m_depcnt == 1 ) {
+ while (dt->m_isalias) {
+ if (dt->m_depcnt == 1) {
struct dep_t *adt;
- for ( adt = depend; adt; adt = adt-> m_next ) {
- if ( strcmp ( adt-> m_module, dt-> m_deparr [0] ) == 0 )
+ 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 ) {
+ 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;
- mod = dt-> m_module;
- if ( !opt )
- opt = dt-> m_options;
- }
- else
+ } else {
+ bb_error_msg("module %s not found", mod);
return;
- }
- else
+ }
+ } 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_module )) {
+ 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;
+ if (find->m_prev)
+ find->m_prev->m_next = find->m_next;
else
- *head = find-> m_next;
+ *head = find->m_next;
- if ( find-> m_next )
- find-> m_next-> m_prev = find-> m_prev;
+ if (find->m_next)
+ find->m_next->m_prev = find->m_prev;
else
- *tail = find-> m_prev;
+ *tail = find->m_prev;
break; // there can be only one duplicate
}
}
- if ( !find ) { // did not find a duplicate
- find = (struct mod_list_t *) xmalloc ( sizeof(struct mod_list_t));
- find-> m_module = mod;
- find-> m_options = opt;
+ 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 = 0;
+ if (*tail)
+ (*tail)->m_next = find;
+ find->m_prev = *tail;
+ find->m_next = NULL; /* possibly NOT done by xzalloc! */
- if ( !*head )
+ if (!*head)
*head = find;
*tail = find;
- if ( dt ) {
+ if (dt) {
int i;
- for ( i = 0; i < dt-> m_depcnt; i++ )
- check_dep ( dt-> m_deparr [i], head, tail );
+ /* 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 )
+static int mod_insert(char *mod, int argc, char **argv)
{
- struct mod_list_t *tail = 0;
- struct mod_list_t *head = 0;
+ 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 );
+ check_dep(mod, &head, &tail);
- if ( head && tail ) {
- if ( argc ) {
+ rc = 1;
+ if (head && tail) {
+ if (argc) {
int i;
- int l = 0;
-
// append module args
- for ( i = 0; i < argc; i++ )
- l += ( bb_strlen ( argv [i] ) + 1 );
-
- head-> m_options = xrealloc ( head-> m_options, l + 1 );
- head-> m_options [0] = 0;
-
- for ( i = 0; i < argc; i++ ) {
- strcat ( head-> m_options, argv [i] );
- strcat ( head-> m_options, " " );
- }
+ for (i = 0; i < argc; i++)
+ head->m_options = append_option(head->m_options, argv[i]);
}
// process tail ---> head
- rc = mod_process ( tail, 1 );
+ 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;
+ }
}
- else
- rc = 1;
-
return rc;
}
-static int mod_remove ( char *mod )
+static int mod_remove(char *mod)
{
int rc;
- static struct mod_list_t rm_a_dummy = { "-a", 0, 0 };
+ static const struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL };
- struct mod_list_t *head = 0;
- struct mod_list_t *tail = 0;
+ struct mod_list_t *head = NULL;
+ struct mod_list_t *tail = NULL;
- if ( mod )
- check_dep ( mod, &head, &tail );
+ if (mod)
+ check_dep(mod, &head, &tail);
else // autoclean
- head = tail = &rm_a_dummy;
+ head = tail = (struct mod_list_t*) &rm_a_dummy;
- if ( head && tail )
- rc = mod_process ( head, 0 ); // process head ---> tail
- else
- rc = 1;
+ 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);
-extern int modprobe_main(int argc, char** argv)
-{
- int opt;
- int remove_opt = 0;
-
- autoclean = show_only = quiet = do_syslog = verbose = 0;
-
- while ((opt = getopt(argc, argv, "acdklnqrst:vVC:")) != -1) {
- switch(opt) {
- case 'c': // no config used
- case 'l': // no pattern matching
- return EXIT_SUCCESS;
- break;
- case 'C': // no config used
- case 't': // no pattern matching
- bb_error_msg_and_die("-t and -C not supported");
-
- case 'a': // ignore
- case 'd': // ignore
- break;
- case 'k':
- autoclean++;
- break;
- case 'n':
- show_only++;
- break;
- case 'q':
- quiet++;
- break;
- case 'r':
- remove_opt++;
- break;
- case 's':
- do_syslog++;
- break;
- case 'v':
- verbose++;
- break;
- case 'V':
- default:
- bb_show_usage();
- break;
- }
- }
+ 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 ( );
+ depend = build_dep();
- if ( !depend )
- bb_error_msg_and_die ( "could not parse modules.dep\n" );
+ if (!depend)
+ bb_error_msg_and_die("cannot parse "CONFIG_DEFAULT_DEPMOD_FILE);
if (remove_opt) {
- int rc = EXIT_SUCCESS;
do {
- if (mod_remove ( optind < argc ?
- bb_xstrdup (argv [optind]) : NULL )) {
- bb_error_msg ("failed to remove module %s",
- argv [optind] );
+ /* 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 );
+ } while (++optind < argc);
+ } else {
+ if (optind >= argc)
+ bb_error_msg_and_die("no module or pattern provided");
- return rc;
+ if (mod_insert(argv[optind], argc - optind - 1, argv + optind + 1))
+ bb_error_msg_and_die("failed to %s module %s", "load", argv[optind]);
}
- if (optind >= argc)
- bb_error_msg_and_die ( "No module or pattern provided\n" );
-
- if ( mod_insert ( bb_xstrdup ( argv [optind] ), argc - optind - 1, argv + optind + 1 ))
- bb_error_msg_and_die ( "failed to load module %s", argv [optind] );
+ /* Here would be a good place to free up memory allocated during the dependencies build. */
- return EXIT_SUCCESS;
+ return rc;
}
-
-
projects / oweals / busybox.git / blobdiff