ba1315d0fb
- a lot faster (linear algorithmic complexity, smaller memory foot print) - a lot smaller (the old code was overly complicated) - loading of aliases is now module-init-tools compliant - blacklisting is done correctly (-b option added) - module argument quoting done right - depmod now correctly generates modules.symbols and modules.alias add/remove: 16/21 grow/shrink: 4/6 up/down: 6930/-9316 Total: -2386 bytes text data bss dec hex filename 806039 592 6680 813311 c68ff busybox_old 803498 592 6676 810766 c5f0e busybox_unstripped
142 lines
3.0 KiB
C
142 lines
3.0 KiB
C
/*
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* Common modutils related functions for busybox
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*
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* Copyright (C) 2008 by Timo Teras <timo.teras@iki.fi>
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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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#include "modutils.h"
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#ifdef __UCLIBC__
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extern int init_module(void *module, unsigned long len, const char *options);
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extern int delete_module(const char *module, unsigned int flags);
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#else
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# include <sys/syscall.h>
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# define init_module(mod, len, opts) syscall(__NR_init_module, mod, len, opts)
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# define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags)
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#endif
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USE_FEATURE_2_4_MODULES(char *insmod_outputname);
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/*
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a libbb candidate from ice age!
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*/
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llist_t FAST_FUNC *llist_find(llist_t *first, const char *str)
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{
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while (first != NULL) {
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if (strcmp(first->data, str) == 0)
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return first;
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first = first->link;
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}
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return NULL;
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}
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void FAST_FUNC replace(char *s, char what, char with)
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{
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while (*s) {
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if (what == *s)
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*s = with;
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++s;
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}
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}
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char * FAST_FUNC replace_underscores(char *s)
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{
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replace(s, '-', '_');
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return s;
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}
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int FAST_FUNC string_to_llist(char *string, llist_t **llist, const char *delim)
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{
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char *tok;
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int len = 0;
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while ((tok = strsep(&string, delim)) != NULL) {
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if (tok[0] == '\0')
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continue;
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llist_add_to_end(llist, xstrdup(tok));
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len += strlen(tok);
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}
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return len;
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}
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char * FAST_FUNC filename2modname(const char *filename, char *modname)
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{
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int i;
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char *from;
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if (filename == NULL)
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return NULL;
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if (modname == NULL)
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modname = xmalloc(MODULE_NAME_LEN);
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from = bb_get_last_path_component_nostrip(filename);
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for (i = 0; i < MODULE_NAME_LEN && from[i] != '\0' && from[i] != '.'; i++)
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modname[i] = (from[i] == '-') ? '_' : from[i];
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modname[i] = 0;
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return modname;
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}
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const char * FAST_FUNC moderror(int err)
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{
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switch (err) {
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case -1:
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return "no such module";
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case ENOEXEC:
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return "invalid module format";
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case ENOENT:
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return "unknown symbol in module, or unknown parameter";
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case ESRCH:
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return "module has wrong symbol version";
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case ENOSYS:
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return "kernel does not support requested operation";
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default:
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return strerror(err);
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}
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}
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char * FAST_FUNC parse_cmdline_module_options(char **argv)
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{
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char *options;
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int optlen;
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options = xzalloc(1);
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optlen = 0;
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while (*++argv) {
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options = xrealloc(options, optlen + 2 + strlen(*argv) + 2);
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/* Spaces handled by "" pairs, but no way of escaping quotes */
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optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
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}
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return options;
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}
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int FAST_FUNC bb_init_module(const char *filename, const char *options)
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{
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size_t len = MAXINT(ssize_t);
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char *image;
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int rc = ENOENT;
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#if ENABLE_FEATURE_2_4_MODULES
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if (get_linux_version_code() < KERNEL_VERSION(2,6,0))
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return bb_init_module_24(filename, options);
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#endif
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/* Use the 2.6 way */
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image = (char *) xmalloc_open_zipped_read_close(filename, &len);
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if (image) {
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if (init_module(image, len, options) != 0)
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rc = errno;
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else
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rc = 0;
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free(image);
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}
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return rc;
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}
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int FAST_FUNC bb_delete_module(const char *module, unsigned int flags)
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{
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return delete_module(module, flags);
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}
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