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- add alias support
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ef729dd90c
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c2741e1f72
@ -25,6 +25,16 @@ config FEATURE_DEPMOD_PRUNE_FANCY
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If unsure, say N.
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config FEATURE_DEPMOD_ALIAS
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bool "alias support"
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default n
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depends on DEPMOD
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help
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By default modules.dep does not contain alias information.
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Enable this to emit aliases of the form:
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alias pcmcia:m*c*f03fn*pfn*pa*pb*pc*pd* parport_cs
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config INSMOD
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bool "insmod"
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default n
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@ -10,12 +10,6 @@
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#define _GNU_SOURCE
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#include <libbb.h>
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#include <sys/utsname.h> /* uname() */
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#if ENABLE_DEBUG
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#include <assert.h>
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#define dbg_assert assert
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#else
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#define dbg_assert(stuff) do {} while (0)
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#endif
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/*
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* Theory of operation:
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* - iterate over all modules and record their full path
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@ -26,33 +20,33 @@
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typedef struct dep_lst_t {
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char *name;
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llist_t *dependencies;
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llist_t *aliases;
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struct dep_lst_t *next;
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} dep_lst_t;
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struct globals {
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dep_lst_t *lst; /* modules without their corresponding extension */
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size_t moddir_base_len; /* length of the "-b basedir" */
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};
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#define G (*(struct globals*)&bb_common_bufsiz1)
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/* We have to zero it out because of NOEXEC */
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#define INIT_G() memset(&G, 0, sizeof(G))
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static int fill_lst(const char *modulename, struct stat ATTRIBUTE_UNUSED *sb,
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void ATTRIBUTE_UNUSED *data, int ATTRIBUTE_UNUSED depth)
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static char* find_keyword(void *the_module, size_t len, const char * const word)
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{
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/* We get a file here. If the file does not have ".ko" but an
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* intermittent dentry has, it's just their fault.
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*/
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if (strrstr(modulename, ".ko") != NULL) {
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dep_lst_t *new = xzalloc(sizeof(dep_lst_t));
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new->name = xstrdup(modulename + G.moddir_base_len);
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new->next = G.lst;
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G.lst = new;
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}
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return TRUE;
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char *ptr = the_module;
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do {
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/* search for the first char in word */
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ptr = memchr(ptr, *word, len - (ptr - (char*)the_module));
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if (ptr == NULL) /* no occurance left, done */
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return NULL;
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if (!strncmp(ptr, word, strlen(word))) {
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ptr += strlen(word);
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break;
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}
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++ptr;
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} while (1);
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return ptr;
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}
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static int fileAction(const char *fname, struct stat *sb,
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void ATTRIBUTE_UNUSED *data, int ATTRIBUTE_UNUSED depth)
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{
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@ -79,45 +73,37 @@ static int fileAction(const char *fname, struct stat *sb,
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close(fd);
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if (the_module == MAP_FAILED)
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bb_perror_msg_and_die("mmap");
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ptr = the_module;
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this = G.lst;
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do {
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if (!strcmp(fname + G.moddir_base_len, this->name))
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break;
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this = this->next;
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} while (this);
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dbg_assert (this);
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//bb_info_msg("fname='%s'", fname + G.moddir_base_len);
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do {
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/* search for a 'd' */
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ptr = memchr(ptr, 'd', len - (ptr - (char*)the_module));
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if (ptr == NULL) /* no d left, done */
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goto none;
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if (!strncmp(ptr, "depends=", sizeof("depends=")-1))
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break;
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++ptr;
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} while (1);
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deps = depends = xstrdup (ptr + sizeof("depends=")-1);
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this = xzalloc(sizeof(dep_lst_t));
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this->name = xstrdup(fname);
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this->next = G.lst;
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G.lst = this;
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//bb_info_msg("fname='%s'", fname);
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ptr = find_keyword(the_module, len, "depends=");
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if (!*ptr)
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goto d_none;
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deps = depends = xstrdup(ptr);
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//bb_info_msg(" depends='%s'", depends);
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while (deps) {
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dep_lst_t *all = G.lst;
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ptr = strsep(&deps, ",");
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while (all) {
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/* Compare the recorded filenames ignoring ".ko*" at the end. */
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char *tmp = bb_get_last_path_component_nostrip(all->name);
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if (!strncmp(ptr, tmp, MAX(strlen(ptr),strrstr(tmp, ".ko") - tmp)))
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break; /* found it */
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all = all->next;
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}
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if (all) {
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dbg_assert(all->name); /* this cannot be empty */
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//bb_info_msg("[%s] -> '%s'", (char*)ptr, all->name);
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llist_add_to_end(&this->dependencies, all->name);
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}
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//bb_info_msg("[%s] -> '%s'", fname, (char*)ptr);
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llist_add_to_end(&this->dependencies, xstrdup(ptr));
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}
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free(depends);
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none:
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d_none:
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if (ENABLE_FEATURE_DEPMOD_ALIAS)
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{
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size_t pos = 0;
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do {
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ptr = find_keyword(the_module + pos, len - pos, "alias=");
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if (ptr) {
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//bb_info_msg("[%s] alias '%s'", fname, (char*)ptr);
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llist_add_to_end(&this->aliases, xstrdup(ptr));
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} else
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break;
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pos = (ptr - (char*)the_module);
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} while (1);
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}
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munmap(the_module, sb->st_size);
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skip:
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return TRUE;
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@ -127,6 +113,7 @@ int depmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
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{
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int ret;
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size_t moddir_base_len = 0; /* length of the "-b basedir" */
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char *moddir_base = NULL, *moddir, *system_map, *chp;
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FILE *filedes = stdout;
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enum {
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@ -157,13 +144,8 @@ int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
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option_mask32 |= *argv == NULL;
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if (option_mask32 & ARG_b) {
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G.moddir_base_len = strlen(moddir_base);
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if (ENABLE_FEATURE_CLEAN_UP) {
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chp = moddir;
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moddir = concat_path_file(moddir_base, moddir);
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free (chp);
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} else
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moddir = concat_path_file(moddir_base, moddir);
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moddir_base_len = strlen(moddir_base) + 1;
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xchdir(moddir_base);
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}
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if (!(option_mask32 & ARG_n)) { /* --dry-run */
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@ -173,23 +155,8 @@ int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
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free(chp);
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}
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ret = EXIT_SUCCESS;
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/* We have to do a full walk to collect all needed data. */
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if (!recursive_action(moddir,
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ACTION_RECURSE, /* flags */
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fill_lst, /* file action */
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NULL, /* dir action */
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NULL, /* user data */
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0)) { /* depth */
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if (ENABLE_FEATURE_CLEAN_UP)
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ret = EXIT_FAILURE;
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else
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return EXIT_FAILURE;
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}
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#if ENABLE_FEATURE_CLEAN_UP
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else
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#endif
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do {
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chp = option_mask32 & ARG_a ? moddir : *argv++;
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chp = option_mask32 & ARG_a ? moddir : (*argv + moddir_base_len);
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if (!recursive_action(chp,
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ACTION_RECURSE, /* flags */
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@ -199,8 +166,42 @@ int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
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0)) { /* depth */
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ret = EXIT_FAILURE;
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}
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} while (!(option_mask32 & ARG_a) && *argv);
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} while (!(option_mask32 & ARG_a) && *++argv);
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{
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dep_lst_t *mods = G.lst;
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/* Fixup the module names in the depends list */
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while (mods) {
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llist_t *deps = NULL, *old_deps = mods->dependencies;
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while (old_deps) {
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dep_lst_t *all = G.lst;
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char *longname = NULL;
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char *shortname = llist_pop(&old_deps);
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while (all) {
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char *nam =
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xstrdup(bb_get_last_path_component_nostrip(all->name));
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char *tmp = strrstr(nam, ".ko");
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*tmp = '\0';
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if (!strcmp(nam, shortname)) {
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if (ENABLE_FEATURE_CLEAN_UP)
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free(nam);
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longname = all->name;
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break;
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}
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free(nam);
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all = all->next;
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}
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llist_add_to_end(&deps, longname);
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}
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mods->dependencies = deps;
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mods = mods->next;
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}
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#if ENABLE_FEATURE_DEPMOD_PRUNE_FANCY
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/* modprobe allegedly wants dependencies without duplicates, i.e.
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* mod1: mod2 mod3
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* mod2: mod3
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@ -211,9 +212,7 @@ int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
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* mod2: mod3
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* mod3:
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*/
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{
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dep_lst_t *mods = G.lst;
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#if ENABLE_FEATURE_DEPMOD_PRUNE_FANCY
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mods = G.lst;
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while (mods) {
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llist_t *deps = mods->dependencies;
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while (deps) {
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@ -241,15 +240,36 @@ int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
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}
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mods = mods->next;
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}
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#endif
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mods = G.lst;
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#endif
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/* Finally print them. */
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while (mods) {
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fprintf(filedes, "%s:", mods->name);
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while (mods->dependencies)
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fprintf(filedes, " %s", (char*)llist_pop(&mods->dependencies));
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/* If we did not resolve all modules, then it's likely that we just did
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* not see the names of all prerequisites (which will be NULL in this
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* case). */
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while (mods->dependencies) {
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char *the_dep = llist_pop(&mods->dependencies);
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if (the_dep)
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fprintf(filedes, " %s", the_dep);
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}
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fprintf(filedes, "\n");
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if (ENABLE_FEATURE_DEPMOD_ALIAS)
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{
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char *shortname =
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xstrdup(bb_get_last_path_component_nostrip(mods->name));
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char *tmp = strrstr(shortname, ".ko");
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*tmp = '\0';
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while (mods->aliases) {
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fprintf(filedes, "alias %s %s\n",
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(char*)llist_pop(&mods->aliases),
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shortname);
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}
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free(shortname);
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}
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mods = mods->next;
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}
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}
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