/* vi: set sw=4 ts=4: */
/*
- * really dumb modprobe implementation for busybox
- * Copyright (C) 2001 Lineo, davidm@lineo.com
+ * Modprobe written from scratch for BusyBox
*
- * dependency specific stuff completly rewritten and
- * copyright (c) 2002 by Robert Griebl, griebl@gmx.de
+ * 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 <sys/utsname.h>
+#include <sys/types.h>
+#include <sys/wait.h>
#include <getopt.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include "busybox.h"
+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 */
+ int m_isalias : 1; /* the module is an alias */
+ int m_reserved : 15; /* stuffin' */
-struct dep_t {
- char * m_module;
-
- int m_isalias : 1;
- int m_reserved : 15;
-
- int m_depcnt : 16;
- char ** m_deparr;
-
- struct dep_t * m_next;
+ int m_depcnt : 16; /* the number of dependable module(s) */
+ char ** m_deparr; /* the list of dependable module(s) */
+
+ struct dep_t * m_next; /* the next dependency rule */
};
-struct mod_list_t {
- char * m_module;
-
+struct mod_list_t { /* two-way list of modules to process */
+ /* a module description */
+ 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 parse_tag_value ( char *buffer, char **ptag, char **pvalue )
+{
+ char *tag, *value;
+
+ while ( isspace ( *buffer ))
+ buffer++;
+ tag = value = buffer;
+ while ( !isspace ( *value ))
+ if (!*value) return 0;
+ else value++;
+ *value++ = 0;
+ while ( isspace ( *value ))
+ 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...
+ */
+static char *reads ( int fd, char *buffer, size_t len )
+{
+ int n = read ( fd, buffer, len );
+
+ if ( n > 0 ) {
+ char *p;
+
+ buffer [len-1] = 0;
+ p = strchr ( buffer, '\n' );
+
+ if ( p ) {
+ off_t offset;
+ 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
+
+ p[1] = 0;
+ }
+ return buffer;
+ }
+
+ else
+ return 0;
+}
+
+/*
+ * This function appends an option to a list
+ */
+struct mod_opt_t *append_option( struct mod_opt_t *opt_list, char *opt )
+{
+ struct mod_opt_t *ol = opt_list;
+
+ if( ol ) {
+ while( ol-> m_next ) {
+ ol = ol-> m_next;
+ }
+ ol-> m_next = xmalloc( sizeof( struct mod_opt_t ) );
+ ol = ol-> m_next;
+ } else {
+ ol = opt_list = xmalloc( sizeof( struct mod_opt_t ) );
+ }
+
+ ol-> m_opt_val = bb_xstrdup( opt );
+ ol-> m_next = NULL;
+
+ return opt_list;
+}
+
+#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 bb_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;
+
+ /* Dumb you, I have nothing to do... */
+ if( src == NULL ) return src;
+
+ /* 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 = bb_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;
+ }
+ 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, strlen( *dst ) );
+ return src;
+}
+#else
+#define parse_command_string(src, dst) (0)
+#endif /* ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
+
+/*
+ * 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, n;
+ int fd;
struct utsname un;
struct dep_t *first = 0;
struct dep_t *current = 0;
- char buffer[256];
+ char buffer[2048];
char *filename = buffer;
int continuation_line = 0;
-
+ int k_version;
+
+ k_version = 0;
if ( uname ( &un ))
- return 0;
-
+ bb_error_msg_and_die("can't determine kernel version");
+
// check for buffer overflow in following code
- if ( xstrlen ( un.release ) > ( sizeof( buffer ) - 64 )) {
+ if ( bb_strlen ( un.release ) > ( sizeof( buffer ) - 64 )) {
return 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)
- return 0;
-
- while ( (n = read(fd, buffer, 255)) > 0) {
- int l;
- char *p = 0;
+ if (( fd = open ( filename, O_RDONLY )) < 0 ) {
- /* 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... */
- p = strchr ( buffer, '\n' );
- if (p) {
- off_t offset;
- /* Get the current file descriptor offset */
- offset = lseek(fd, 0L, SEEK_CUR);
- /* Set the file descriptor offset to right after the \n */
- lseek(fd, offset-n+p-buffer+1, SEEK_SET);
- *(p+1)='\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;
}
+ }
+
+ while ( reads ( fd, buffer, sizeof( buffer ))) {
+ int l = bb_strlen ( buffer );
+ char *p = 0;
- l = xstrlen ( buffer );
while ( isspace ( buffer [l-1] )) {
buffer [l-1] = 0;
l--;
}
-
+
if ( l == 0 ) {
continuation_line = 0;
continue;
}
-
- if ( !continuation_line ) {
+
+ /* Is this a new module dep description? */
+ if ( !continuation_line ) {
+ /* find the dep beginning */
char *col = strchr ( buffer, ':' );
-
+ char *dot = col;
+
if ( col ) {
+ /* This line is a dep description */
char *mods;
+ char *modpath;
char *mod;
- int ext = 0;
-
+
+ /* Find the beginning of the module file name */
*col = 0;
mods = strrchr ( buffer, '/' );
-
+
if ( !mods )
- mods = buffer;
+ mods = buffer; /* no path for this module */
+ else
+ mods++; /* there was a path for this module... */
+
+ /* find the path of the module */
+ modpath = strchr ( buffer, '/' ); /* ... and this is the path */
+ if ( !modpath )
+ modpath = 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
- mods++;
-
- if (( *(col-2) == '.' ) && ( *(col-1) == 'o' ))
- ext = 2;
-
- mod = xstrndup ( mods, col - mods - ext );
-
+ if (( *(col-2) == '.' ) && ( *(col-1) == 'o' ))
+ dot = col - 2;
+
+ mod = bb_xstrndup ( mods, dot - mods );
+
+ /* enqueue new module */
if ( !current ) {
first = current = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
}
current-> m_next = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
current = current-> m_next;
}
- current-> m_module = mod;
+ current-> m_name = mod;
+ current-> m_path = bb_xstrdup(modpath);
+ current-> m_options = NULL;
current-> m_isalias = 0;
current-> m_depcnt = 0;
current-> m_deparr = 0;
current-> m_next = 0;
-
- //printf ( "%s:\n", mod );
-
- p = col + 1;
+
+ p = col + 1;
}
else
+ /* this line is not a dep description */
p = 0;
}
else
+ /* It's a dep description continuation */
p = buffer;
-
+
+ while ( p && *p && isblank(*p))
+ p++;
+
+ /* p points to the first dependable module; if NULL, no dependable module */
if ( p && *p ) {
char *end = &buffer [l-1];
- char *deps = strrchr ( end, '/' );
+ char *deps;
char *dep;
+ char *next;
int ext = 0;
-
+
while ( isblank ( *end ) || ( *end == '\\' ))
end--;
-
- deps = strrchr ( p, '/' );
-
- if ( !deps || ( deps < p )) {
- deps = p;
-
- while ( isblank ( *deps ))
+
+ do
+ {
+ /* search the end of the dependency */
+ next = strchr (p, ' ' );
+ if (next)
+ {
+ *next = 0;
+ next--;
+ }
+ else
+ next = end;
+
+ /* find the beginning of the module file name */
+ deps = strrchr ( p, '/' );
+
+ if ( !deps || ( deps < p )) {
+ deps = p;
+
+ while ( isblank ( *deps ))
+ deps++;
+ }
+ else
deps++;
- }
- else
- deps++;
-
- if (( *(end-1) == '.' ) && ( *end == 'o' ))
- ext = 2;
-
- dep = xstrndup ( deps, end - 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;
-
- //printf ( " %d) %s\n", current-> m_depcnt, current-> m_deparr [current-> m_depcnt -1] );
+
+ /* 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 == 'o' ) )
+ ext = 3;
+ else
+ if (( *(next-1) == '.' ) && ( *next == 'o' ))
+ ext = 2;
+
+ /* Cope with blank lines */
+ if ((next-deps-ext+1) <= 0)
+ continue;
+ dep = bb_xstrndup ( deps, next - deps - ext + 1 );
+
+ /* Add the new dependable module name */
+ current-> m_depcnt++;
+ current-> m_deparr = (char **) xrealloc ( current-> m_deparr,
+ sizeof ( char *) * current-> m_depcnt );
+ current-> m_deparr [current-> m_depcnt - 1] = dep;
+
+ p = next + 2;
+ } while (next < end);
}
-
+
+ /* is there other dependable module(s) ? */
if ( buffer [l-1] == '\\' )
continuation_line = 1;
else
// alias parsing is not 100% correct (no correct handling of continuation lines within an alias) !
- if ((fd = open ( "/etc/modules.conf", O_RDONLY )) < 0)
- if ((fd = open ( "/etc/conf.modules", O_RDONLY )) < 0)
- return first;
-
+ if (!ENABLE_FEATURE_2_6_MODULES
+ || ( fd = open ( "/etc/modprobe.conf", O_RDONLY )) < 0 )
+ if (( fd = open ( "/etc/modules.conf", O_RDONLY )) < 0 )
+ if (( fd = open ( "/etc/conf.modules", O_RDONLY )) < 0 )
+ return first;
+
continuation_line = 0;
- while ( read(fd, buffer, 255) > 0) {
+ while ( reads ( fd, buffer, sizeof( buffer ))) {
int l;
char *p;
-
- /* 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... */
- p = strchr ( buffer, '\n' );
- if (p) {
- off_t offset;
- /* Get the current file descriptor offset */
- offset = lseek(fd, 0L, SEEK_CUR);
- /* Set the file descriptor offset to right after the \n */
- lseek(fd, offset-n+p-buffer+1, SEEK_SET);
- *(p+1)='\0';
- }
p = strchr ( buffer, '#' );
if ( p )
*p = 0;
-
- l = xstrlen ( buffer );
-
+
+ l = bb_strlen ( buffer );
+
while ( l && isspace ( buffer [l-1] )) {
buffer [l-1] = 0;
l--;
}
-
+
if ( l == 0 ) {
continuation_line = 0;
continue;
}
-
- if ( !continuation_line ) {
+
+ if ( !continuation_line ) {
if (( strncmp ( buffer, "alias", 5 ) == 0 ) && isspace ( buffer [5] )) {
char *alias, *mod;
- alias = buffer + 6;
-
- while ( isspace ( *alias ))
- alias++;
- mod = alias;
- while ( !isspace ( *mod ))
- mod++;
- *mod = 0;
- mod++;
- while ( isspace ( *mod ))
- mod++;
-
-// fprintf ( stderr, "ALIAS: '%s' -> '%s'\n", alias, mod );
-
- if ( !current ) {
- first = current = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
+ if ( parse_tag_value ( buffer + 6, &alias, &mod )) {
+ /* handle alias as a module dependent on the aliased module */
+ 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_name = 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 {
- current-> m_next = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
- current = current-> m_next;
- }
- current-> m_module = xstrdup ( alias );
- current-> m_isalias = 1;
-
- if (( strcmp ( alias, "off" ) == 0 ) || ( strcmp ( alias, "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] = xstrdup ( mod );
+ }
+ else if (( strncmp ( buffer, "options", 7 ) == 0 ) && isspace ( buffer [7] )) {
+ 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 );
+ }
+ }
}
- current-> m_next = 0;
- }
+ }
}
}
close ( fd );
-
+
return first;
}
+/* return 1 = loaded, 0 = not loaded, -1 = can't tell */
+static int already_loaded (const char *name)
+{
+ int fd;
+ char buffer[4096];
+
+ fd = open ("/proc/modules", O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ while ( reads ( fd, buffer, sizeof( buffer ))) {
+ char *p;
+
+ p = strchr (buffer, ' ');
+ if (p) {
+ *p = 0;
+ for( p = buffer; ENABLE_FEATURE_2_6_MODULES && *p; p++ ) {
+ *p = ((*p)=='-')?'_':*p;
+ }
+ if (strcmp (name, buffer) == 0) {
+ close (fd);
+ return 1;
+ }
+ }
+ }
+
+ close (fd);
+ return 0;
+}
static int mod_process ( struct mod_list_t *list, int do_insert )
{
- char lcmd [256];
int rc = 0;
-
- if ( !list )
- return 1;
+ char **argv = NULL;
+ struct mod_opt_t *opts;
+ int argc_malloc; /* never used when CONFIG_FEATURE_CLEAN_UP not defined */
+ int argc;
while ( list ) {
- if ( do_insert )
- snprintf ( lcmd, sizeof( lcmd ) - 1, "insmod %s %s %s %s 2>/dev/null", do_syslog ? "-s" : "", autoclean ? "-k" : "", quiet ? "-q" : "", list-> m_module );
- else
- snprintf ( lcmd, sizeof( lcmd ) - 1, "rmmod %s %s 2>/dev/null", do_syslog ? "-s" : "", list-> m_module );
-
- if ( verbose )
- printf ( "%s\n", lcmd );
- if ( !show_only )
- rc |= system ( lcmd );
-
+ argc = 0;
+ if( ENABLE_FEATURE_CLEAN_UP )
+ argc_malloc = 0;
+ /* If CONFIG_FEATURE_CLEAN_UP is not defined, then we leak memory
+ * each time we allocate memory for argv.
+ * But it is (quite) small amounts of memory that leak each
+ * time a module is loaded, and it is reclaimed when modprobe
+ * exits anyway (even when standalone shell?).
+ * This could become a problem when loading a module with LOTS of
+ * dependencies, with LOTS of options for each dependencies, with
+ * very little memory on the target... But in that case, the module
+ * would not load because there is no more memory, so there's no
+ * problem. */
+ /* enough for minimal insmod (5 args + NULL) or rmmod (3 args + NULL) */
+ argv = (char**) malloc( 6 * sizeof( char* ) );
+ if ( do_insert ) {
+ if (already_loaded (list->m_name) != 1) {
+ argv[argc++] = "insmod";
+ if (do_syslog)
+ argv[argc++] = "-s";
+ if (autoclean)
+ argv[argc++] = "-k";
+ if (quiet)
+ argv[argc++] = "-q";
+ else if(verbose) /* verbose and quiet are mutually exclusive */
+ argv[argc++] = "-v";
+ argv[argc++] = list-> m_path;
+ if( ENABLE_FEATURE_CLEAN_UP )
+ argc_malloc = argc;
+ opts = list-> m_options;
+ while( opts ) {
+ /* Add one more option */
+ argc++;
+ argv = (char**) xrealloc( argv, ( argc + 1 ) * sizeof( char* ) );
+ argv[argc-1] = opts-> m_opt_val;
+ opts = opts-> m_next;
+ }
+ }
+ } else {
+ /* modutils uses short name for removal */
+ if (already_loaded (list->m_name) != 0) {
+ argv[argc++] = "rmmod";
+ if (do_syslog)
+ argv[argc++] = "-s";
+ argv[argc++] = list->m_name;
+ if( ENABLE_FEATURE_CLEAN_UP )
+ argc_malloc = argc;
+ }
+ }
+ argv[argc] = NULL;
+
+ if (argc) {
+ if (verbose) {
+ printf("%s module %s\n", do_insert?"Loading":"Unloading", list-> m_name );
+ }
+ if (!show_only) {
+ int rc2 = 0;
+ int status;
+ switch (fork()) {
+ case -1:
+ rc2 = 1;
+ break;
+ case 0: //child
+ execvp(argv[0], argv);
+ bb_perror_msg_and_die("exec of %s", argv[0]);
+ /* NOTREACHED */
+ default:
+ if (wait(&status) == -1) {
+ rc2 = 1;
+ break;
+ }
+ if (WIFEXITED(status))
+ rc2 = WEXITSTATUS(status);
+ if (WIFSIGNALED(status))
+ rc2 = WTERMSIG(status);
+ break;
+ }
+ if (do_insert) {
+ rc = rc2; /* only last module matters */
+ }
+ else if (!rc2) {
+ rc = 0; /* success if remove any mod */
+ }
+ }
+ if( ENABLE_FEATURE_CLEAN_UP )
+ /* the last value in the array has index == argc, but
+ * it is the terminating NULL, so we must not free it. */
+ while( argc_malloc < argc ) {
+ free( argv[argc_malloc++] );
+ }
+ }
+ if( ENABLE_FEATURE_CLEAN_UP ) {
+ free( argv );
+ argv = NULL;
+ }
list = do_insert ? list-> m_prev : list-> m_next;
}
- return rc;
+ return (show_only) ? 0 : rc;
}
+/*
+ * Builds the dependency list (aka stack) of a module.
+ * head: the highest module in the stack (last to insmod, first to rmmod)
+ * tail: the lowest module in the stack (first to insmod, last to rmmod)
+ */
static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t **tail )
{
struct mod_list_t *find;
struct dep_t *dt;
-
- int lm;
-
- // remove .o extension
- lm = xstrlen ( mod );
- if (( mod [lm-2] == '.' ) && ( mod [lm-1] == 'o' ))
- mod [lm-2] = 0;
+ struct mod_opt_t *opt = 0;
+ char *path = 0;
// check dependencies
for ( dt = depend; dt; dt = dt-> m_next ) {
- if ( strcmp ( dt-> m_module, mod ) == 0 )
+ if ( strcmp ( dt-> m_name, mod ) == 0) {
break;
+ }
}
- // resolve alias names
- if ( dt && dt-> m_isalias ) {
- if ( dt-> m_depcnt == 1 )
- check_dep ( dt-> m_deparr [0], head, tail );
- printf ( "Got alias: %s -> %s\n", mod, dt-> m_deparr [0] );
-
+
+ if( !dt ) {
+ bb_error_msg ("module %s not found.", mod);
return;
}
-
+
+ // resolve alias names
+ while ( dt-> m_isalias ) {
+ if ( dt-> m_depcnt == 1 ) {
+ struct dep_t *adt;
+
+ for ( adt = depend; adt; adt = adt-> m_next ) {
+ if ( strcmp ( adt-> m_name, dt-> m_deparr [0] ) == 0 )
+ break;
+ }
+ if ( adt ) {
+ /* This is the module we are aliased to */
+ struct mod_opt_t *opts = dt-> m_options;
+ /* Option of the alias are appended to the options of the module */
+ while( opts ) {
+ adt-> m_options = append_option( adt-> m_options, opts-> m_opt_val );
+ opts = opts-> m_next;
+ }
+ dt = adt;
+ }
+ else {
+ bb_error_msg ("module %s not found.", mod);
+ return;
+ }
+ }
+ else {
+ bb_error_msg ("Bad alias %s", dt-> m_name);
+ return;
+ }
+ }
+
+ mod = dt-> m_name;
+ path = dt-> m_path;
+ opt = dt-> m_options;
+
// search for duplicates
for ( find = *head; find; find = find-> m_next ) {
- if ( !strcmp ( mod, find-> m_module )) {
+ if ( !strcmp ( mod, find-> m_name )) {
// found -> dequeue it
if ( find-> m_prev )
find-> m_prev-> m_next = find-> m_next;
else
*head = find-> m_next;
-
+
if ( find-> m_next )
find-> m_next-> m_prev = find-> m_prev;
else
*tail = find-> m_prev;
-
+
break; // there can be only one duplicate
- }
+ }
}
if ( !find ) { // did not find a duplicate
- find = (struct mod_list_t *) xmalloc ( sizeof(struct mod_list_t));
- find-> m_module = mod;
+ find = (struct mod_list_t *) xmalloc ( sizeof(struct mod_list_t));
+ find-> m_name = mod;
+ find-> m_path = path;
+ find-> m_options = opt;
}
- // enqueue at tail
+ // enqueue at tail
if ( *tail )
(*tail)-> m_next = find;
find-> m_prev = *tail;
if ( !*head )
*head = find;
*tail = find;
-
- if ( dt ) {
+
+ if ( dt ) {
int i;
-
+
+ /* Add all dependable module for that new module */
for ( i = 0; i < dt-> m_depcnt; i++ )
check_dep ( dt-> m_deparr [i], head, tail );
}
}
-
-
static int mod_insert ( char *mod, int argc, char **argv )
{
struct mod_list_t *tail = 0;
- struct mod_list_t *head = 0;
- int rc = 0;
-
+ struct mod_list_t *head = 0;
+ int rc;
+
// get dep list for module mod
check_dep ( mod, &head, &tail );
-
+
if ( head && tail ) {
- int i;
- int l = 0;
-
- // append module args
- l = xstrlen ( head-> m_module );
- for ( i = 0; i < argc; i++ )
- l += ( xstrlen ( argv [i] ) + 1 );
-
- head-> m_module = xrealloc ( head-> m_module, l + 1 );
-
- for ( i = 0; i < argc; i++ ) {
- strcat ( head-> m_module, " " );
- strcat ( head-> m_module, argv [i] );
+ if( argc ) {
+ int i;
+ // append module args
+ for ( i = 0; i < argc; i++ )
+ head->m_options = append_option( head->m_options, argv[i] );
}
// process tail ---> head
- rc |= mod_process ( tail, 1 );
+ rc = mod_process ( tail, 1 );
}
else
rc = 1;
-
+
return rc;
}
-static void mod_remove ( char *mod )
+static int mod_remove ( char *mod )
{
- static struct mod_list_t rm_a_dummy = { "-a", 0, 0 };
-
+ int rc;
+ static struct mod_list_t rm_a_dummy = { "-a", 0, 0 };
+
struct mod_list_t *head = 0;
struct mod_list_t *tail = 0;
-
+
if ( mod )
check_dep ( mod, &head, &tail );
else // autoclean
head = tail = &rm_a_dummy;
-
- if ( head && tail )
- mod_process ( head, 0 ); // process head ---> tail
-}
+ if ( head && tail )
+ rc = mod_process ( head, 0 ); // process head ---> tail
+ else
+ rc = 1;
+ return rc;
+}
extern int modprobe_main(int argc, char** argv)
{
int opt;
+ int rc = EXIT_SUCCESS;
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
- 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:
- show_usage();
- break;
+ 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++; verbose=0;
+ break;
+ case 'r':
+ remove_opt++;
+ break;
+ case 's':
+ do_syslog++;
+ break;
+ case 'v':
+ verbose++; quiet=0;
+ break;
+ case 'V':
+ default:
+ bb_show_usage();
+ break;
}
}
-
- depend = build_dep ( );
- if ( !depend )
- error_msg_and_die ( "could not parse modules.dep\n" );
-
+ depend = build_dep ( );
+
+ if ( !depend )
+ bb_error_msg_and_die ( "could not parse modules.dep\n" );
+
if (remove_opt) {
do {
- mod_remove ( optind < argc ? xstrdup ( argv [optind] ) : 0 );
+ if (mod_remove ( optind < argc ?
+ bb_xstrdup (argv [optind]) : NULL )) {
+ bb_error_msg ("failed to remove module %s",
+ argv [optind] );
+ rc = EXIT_FAILURE;
+ }
} while ( ++optind < argc );
-
- return EXIT_SUCCESS;
- }
+ } else {
+ if (optind >= argc)
+ bb_error_msg_and_die ( "No module or pattern provided\n" );
- if (optind >= argc)
- error_msg_and_die ( "No module or pattern provided\n" );
-
- return mod_insert ( xstrdup ( argv [optind] ), argc - optind - 1, argv + optind + 1 ) ? \
- EXIT_FAILURE : EXIT_SUCCESS;
-}
+ 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 rc;
+}
projects / oweals / busybox.git / blobdiff