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-rw-r--r--modutils/Config.in10
-rw-r--r--modutils/depmod.c190
2 files changed, 115 insertions, 85 deletions
diff --git a/modutils/Config.in b/modutils/Config.in
index fb7fb22..bf93c74 100644
--- a/modutils/Config.in
+++ b/modutils/Config.in
@@ -25,6 +25,16 @@ config FEATURE_DEPMOD_PRUNE_FANCY
If unsure, say N.
+config FEATURE_DEPMOD_ALIAS
+ bool "alias support"
+ default n
+ depends on DEPMOD
+ help
+ By default modules.dep does not contain alias information.
+ Enable this to emit aliases of the form:
+
+ alias pcmcia:m*c*f03fn*pfn*pa*pb*pc*pd* parport_cs
+
config INSMOD
bool "insmod"
default n
diff --git a/modutils/depmod.c b/modutils/depmod.c
index b0b09c2..09d31f4 100644
--- a/modutils/depmod.c
+++ b/modutils/depmod.c
@@ -10,12 +10,6 @@
#define _GNU_SOURCE
#include <libbb.h>
#include <sys/utsname.h> /* uname() */
-#if ENABLE_DEBUG
-#include <assert.h>
-#define dbg_assert assert
-#else
-#define dbg_assert(stuff) do {} while (0)
-#endif
/*
* Theory of operation:
* - iterate over all modules and record their full path
@@ -26,33 +20,33 @@
typedef struct dep_lst_t {
char *name;
llist_t *dependencies;
+ llist_t *aliases;
struct dep_lst_t *next;
} dep_lst_t;
struct globals {
dep_lst_t *lst; /* modules without their corresponding extension */
- size_t moddir_base_len; /* length of the "-b basedir" */
};
#define G (*(struct globals*)&bb_common_bufsiz1)
/* We have to zero it out because of NOEXEC */
#define INIT_G() memset(&G, 0, sizeof(G))
-static int fill_lst(const char *modulename, struct stat ATTRIBUTE_UNUSED *sb,
- void ATTRIBUTE_UNUSED *data, int ATTRIBUTE_UNUSED depth)
+static char* find_keyword(void *the_module, size_t len, const char * const word)
{
-
- /* We get a file here. If the file does not have ".ko" but an
- * intermittent dentry has, it's just their fault.
- */
- if (strrstr(modulename, ".ko") != NULL) {
- dep_lst_t *new = xzalloc(sizeof(dep_lst_t));
- new->name = xstrdup(modulename + G.moddir_base_len);
- new->next = G.lst;
- G.lst = new;
- }
- return TRUE;
+ char *ptr = the_module;
+ do {
+ /* search for the first char in word */
+ ptr = memchr(ptr, *word, len - (ptr - (char*)the_module));
+ if (ptr == NULL) /* no occurance left, done */
+ return NULL;
+ if (!strncmp(ptr, word, strlen(word))) {
+ ptr += strlen(word);
+ break;
+ }
+ ++ptr;
+ } while (1);
+ return ptr;
}
-
static int fileAction(const char *fname, struct stat *sb,
void ATTRIBUTE_UNUSED *data, int ATTRIBUTE_UNUSED depth)
{
@@ -79,45 +73,37 @@ static int fileAction(const char *fname, struct stat *sb,
close(fd);
if (the_module == MAP_FAILED)
bb_perror_msg_and_die("mmap");
- ptr = the_module;
- this = G.lst;
- do {
- if (!strcmp(fname + G.moddir_base_len, this->name))
- break;
- this = this->next;
- } while (this);
- dbg_assert (this);
-//bb_info_msg("fname='%s'", fname + G.moddir_base_len);
- do {
- /* search for a 'd' */
- ptr = memchr(ptr, 'd', len - (ptr - (char*)the_module));
- if (ptr == NULL) /* no d left, done */
- goto none;
- if (!strncmp(ptr, "depends=", sizeof("depends=")-1))
- break;
- ++ptr;
- } while (1);
- deps = depends = xstrdup (ptr + sizeof("depends=")-1);
+
+ this = xzalloc(sizeof(dep_lst_t));
+ this->name = xstrdup(fname);
+ this->next = G.lst;
+ G.lst = this;
+//bb_info_msg("fname='%s'", fname);
+ ptr = find_keyword(the_module, len, "depends=");
+ if (!*ptr)
+ goto d_none;
+ deps = depends = xstrdup(ptr);
//bb_info_msg(" depends='%s'", depends);
while (deps) {
- dep_lst_t *all = G.lst;
-
ptr = strsep(&deps, ",");
- while (all) {
- /* Compare the recorded filenames ignoring ".ko*" at the end. */
- char *tmp = bb_get_last_path_component_nostrip(all->name);
- if (!strncmp(ptr, tmp, MAX(strlen(ptr),strrstr(tmp, ".ko") - tmp)))
- break; /* found it */
- all = all->next;
- }
- if (all) {
- dbg_assert(all->name); /* this cannot be empty */
-//bb_info_msg("[%s] -> '%s'", (char*)ptr, all->name);
- llist_add_to_end(&this->dependencies, all->name);
- }
+//bb_info_msg("[%s] -> '%s'", fname, (char*)ptr);
+ llist_add_to_end(&this->dependencies, xstrdup(ptr));
}
free(depends);
- none:
+ d_none:
+ if (ENABLE_FEATURE_DEPMOD_ALIAS)
+ {
+ size_t pos = 0;
+ do {
+ ptr = find_keyword(the_module + pos, len - pos, "alias=");
+ if (ptr) {
+//bb_info_msg("[%s] alias '%s'", fname, (char*)ptr);
+ llist_add_to_end(&this->aliases, xstrdup(ptr));
+ } else
+ break;
+ pos = (ptr - (char*)the_module);
+ } while (1);
+ }
munmap(the_module, sb->st_size);
skip:
return TRUE;
@@ -127,6 +113,7 @@ int depmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
{
int ret;
+ size_t moddir_base_len = 0; /* length of the "-b basedir" */
char *moddir_base = NULL, *moddir, *system_map, *chp;
FILE *filedes = stdout;
enum {
@@ -157,13 +144,8 @@ int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
option_mask32 |= *argv == NULL;
if (option_mask32 & ARG_b) {
- G.moddir_base_len = strlen(moddir_base);
- if (ENABLE_FEATURE_CLEAN_UP) {
- chp = moddir;
- moddir = concat_path_file(moddir_base, moddir);
- free (chp);
- } else
- moddir = concat_path_file(moddir_base, moddir);
+ moddir_base_len = strlen(moddir_base) + 1;
+ xchdir(moddir_base);
}
if (!(option_mask32 & ARG_n)) { /* --dry-run */
@@ -173,23 +155,8 @@ int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
free(chp);
}
ret = EXIT_SUCCESS;
- /* We have to do a full walk to collect all needed data. */
- if (!recursive_action(moddir,
- ACTION_RECURSE, /* flags */
- fill_lst, /* file action */
- NULL, /* dir action */
- NULL, /* user data */
- 0)) { /* depth */
- if (ENABLE_FEATURE_CLEAN_UP)
- ret = EXIT_FAILURE;
- else
- return EXIT_FAILURE;
- }
-#if ENABLE_FEATURE_CLEAN_UP
- else
-#endif
do {
- chp = option_mask32 & ARG_a ? moddir : *argv++;
+ chp = option_mask32 & ARG_a ? moddir : (*argv + moddir_base_len);
if (!recursive_action(chp,
ACTION_RECURSE, /* flags */
@@ -199,8 +166,42 @@ int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
0)) { /* depth */
ret = EXIT_FAILURE;
}
- } while (!(option_mask32 & ARG_a) && *argv);
+ } while (!(option_mask32 & ARG_a) && *++argv);
+
+ {
+ dep_lst_t *mods = G.lst;
+
+ /* Fixup the module names in the depends list */
+ while (mods) {
+ llist_t *deps = NULL, *old_deps = mods->dependencies;
+
+ while (old_deps) {
+ dep_lst_t *all = G.lst;
+ char *longname = NULL;
+ char *shortname = llist_pop(&old_deps);
+ while (all) {
+ char *nam =
+ xstrdup(bb_get_last_path_component_nostrip(all->name));
+ char *tmp = strrstr(nam, ".ko");
+
+ *tmp = '\0';
+ if (!strcmp(nam, shortname)) {
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(nam);
+ longname = all->name;
+ break;
+ }
+ free(nam);
+ all = all->next;
+ }
+ llist_add_to_end(&deps, longname);
+ }
+ mods->dependencies = deps;
+ mods = mods->next;
+ }
+
+#if ENABLE_FEATURE_DEPMOD_PRUNE_FANCY
/* modprobe allegedly wants dependencies without duplicates, i.e.
* mod1: mod2 mod3
* mod2: mod3
@@ -211,9 +212,7 @@ int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
* mod2: mod3
* mod3:
*/
- {
- dep_lst_t *mods = G.lst;
-#if ENABLE_FEATURE_DEPMOD_PRUNE_FANCY
+ mods = G.lst;
while (mods) {
llist_t *deps = mods->dependencies;
while (deps) {
@@ -241,15 +240,36 @@ int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
}
mods = mods->next;
}
+#endif
mods = G.lst;
-#endif
/* Finally print them. */
while (mods) {
fprintf(filedes, "%s:", mods->name);
- while (mods->dependencies)
- fprintf(filedes, " %s", (char*)llist_pop(&mods->dependencies));
+ /* If we did not resolve all modules, then it's likely that we just did
+ * not see the names of all prerequisites (which will be NULL in this
+ * case). */
+ while (mods->dependencies) {
+ char *the_dep = llist_pop(&mods->dependencies);
+ if (the_dep)
+ fprintf(filedes, " %s", the_dep);
+ }
fprintf(filedes, "\n");
+ if (ENABLE_FEATURE_DEPMOD_ALIAS)
+ {
+ char *shortname =
+ xstrdup(bb_get_last_path_component_nostrip(mods->name));
+ char *tmp = strrstr(shortname, ".ko");
+
+ *tmp = '\0';
+
+ while (mods->aliases) {
+ fprintf(filedes, "alias %s %s\n",
+ (char*)llist_pop(&mods->aliases),
+ shortname);
+ }
+ free(shortname);
+ }
mods = mods->next;
}
}
generated by cgit v1.1 at 2024-11-07 02:48:00 +0000