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/* vi: set sw=4 ts=4: */
/*
* depmod - generate modules.dep
* Copyright (c) 2008 Bernhard Fischer
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#undef _GNU_SOURCE
#define _GNU_SOURCE
#include <libbb.h>
#include <sys/utsname.h> /* uname() */
struct globals {
llist_t *lst;
};
#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)
{
llist_add_to_end(&G.lst, strdup(modulename));
return TRUE;
}
static int fileAction(const char *fname, struct stat ATTRIBUTE_UNUSED *sb,
void *data, int ATTRIBUTE_UNUSED depth)
{
size_t seen = 0;
size_t len = MAXINT(ssize_t);
void *the_module = xmalloc_open_read_close(fname, &len), *ptr = the_module;
const char *deps;
RESERVE_CONFIG_BUFFER(depends, 512);
RESERVE_CONFIG_BUFFER(buf1, 512);
memset(buf1, 0, sizeof(buf1));
memset(depends, 0, sizeof(depends));
if (last_char_is(fname, 'o') == NULL) /* not a module */
goto done;
fprintf((FILE*)data, "\n%s:", fname);
//bb_info_msg("[%d] fname='%s'", (int)data, fname);
do {
/* search for a 'd' */
ptr = memchr(ptr, 'd', len - seen);
if (ptr == NULL) /* no d left, done */
break;
if (sscanf(ptr, "depends=%s", depends) == 1)
break;
seen = ++ptr - the_module;
} while (1);
//bb_info_msg(" depends='%s'", depends);
deps = depends;
while (*deps) {
llist_t * _lst = G.lst;
ptr = memchr(deps, ',', strlen(deps));
if (ptr != NULL)
*(char*)ptr = '\0';
/* remember the length of the current dependency plus eventual 0 byte */
len = strlen(deps) + (ptr != NULL);
sprintf(buf1, "/%s.", deps); /* make sure we match the correct file */
while (_lst) {
ptr = strstr(_lst->data, buf1);
if (ptr != NULL)
break; /* found it */
_lst = _lst->link;
}
if (_lst && _lst->data) {
//bb_info_msg("[%s] -> '%s'", deps, _lst->data);
fprintf((FILE*)data, " %s", _lst->data);
deps += len;
}
}
done:
RELEASE_CONFIG_BUFFER(depends);
RELEASE_CONFIG_BUFFER(buf1);
free(the_module);
return TRUE;
}
int depmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int depmod_main(int ATTRIBUTE_UNUSED argc, char **argv)
{
int retval = EXIT_SUCCESS;
// static const char moddir_base[] ALIGN1 = "/lib/modules/%s";
FILE *filedes = xfopen("/tmp/modules.dep", "w");
argv++;
do {
if (!recursive_action(*argv,
ACTION_RECURSE, /* flags */
fill_lst, /* file action */
NULL, /* dir action */
NULL, /* user data */
0) || /* depth */
!recursive_action(*argv,
ACTION_RECURSE, /* flags */
fileAction, /* file action */
NULL, /* dir action */
(void*)filedes, /* user data */
0)) { /* depth */
retval = EXIT_FAILURE;
}
} while (*++argv);
if (ENABLE_FEATURE_CLEAN_UP)
fclose(filedes);
return retval;
}
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