mirror of https://github.com/mirror/busybox.git
117 lines
3.0 KiB
C
117 lines
3.0 KiB
C
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/* vi: set sw=4 ts=4: */
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/*
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* depmod - generate modules.dep
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* Copyright (c) 2008 Bernhard Fischer
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#undef _GNU_SOURCE
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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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struct globals {
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llist_t *lst;
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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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{
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llist_add_to_end(&G.lst, strdup(modulename));
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return TRUE;
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}
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static int fileAction(const char *fname, struct stat ATTRIBUTE_UNUSED *sb,
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void *data, int ATTRIBUTE_UNUSED depth)
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{
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size_t seen = 0;
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size_t len = MAXINT(ssize_t);
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void *the_module = xmalloc_open_read_close(fname, &len), *ptr = the_module;
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const char *deps;
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RESERVE_CONFIG_BUFFER(depends, 512);
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RESERVE_CONFIG_BUFFER(buf1, 512);
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memset(buf1, 0, sizeof(buf1));
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memset(depends, 0, sizeof(depends));
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sprintf(buf1, "\n%s:", fname);
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if (last_char_is(fname, 'o') == NULL) /* not a module */
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goto done;
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write((int)data, buf1, strlen(buf1));
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//bb_info_msg("[%d] fname='%s'", (int)data, fname);
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do {
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/* search for a 'd' */
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ptr = memchr(ptr, 'd', len - seen);
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if (ptr == NULL) /* no d left, done */
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break;
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if (sscanf(ptr, "depends=%s", depends) == 1)
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break;
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seen = ++ptr - the_module;
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} while (1);
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//bb_info_msg(" depends='%s'", depends);
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deps = depends;
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while (*deps) {
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llist_t * _lst = G.lst;
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ptr = memchr(deps, ',', strlen(deps));
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if (ptr != NULL)
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*(char*)ptr = '\0';
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/* remember the length of the current dependency plus eventual 0 byte */
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len = strlen(deps) + (ptr != NULL);
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sprintf(buf1, "/%s.", deps); /* make sure we match the correct file */
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while (_lst) {
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ptr = strstr(_lst->data, buf1);
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if (ptr != NULL)
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break; /* found it */
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_lst = _lst->link;
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}
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if (_lst && _lst->data) {
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const char separator = ' ';
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//bb_info_msg("[%s] -> '%s'", deps, _lst->data);
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write((int)data, &separator, 1);
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write((int)data, _lst->data, strlen(_lst->data));
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deps += len;
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}
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}
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done:
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RELEASE_CONFIG_BUFFER(depends);
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RELEASE_CONFIG_BUFFER(buf1);
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free(the_module);
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return TRUE;
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}
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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 retval = EXIT_SUCCESS;
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// static const char moddir_base[] ALIGN1 = "/lib/modules/%s";
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int fd = xopen3("/tmp/modules.dep", O_CREAT|O_WRONLY|O_TRUNC,
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S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH);
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argv++;
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do {
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if (!recursive_action(*argv,
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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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!recursive_action(*argv,
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ACTION_RECURSE, /* flags */
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fileAction, /* file action */
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NULL, /* dir action */
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(void*)fd, /* user data */
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0)) { /* depth */
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retval = EXIT_FAILURE;
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}
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} while (*++argv);
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if (ENABLE_FEATURE_CLEAN_UP)
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close(fd);
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return retval;
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}
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