modutils/*: rewrite by Timo Teras <timo.teras AT iki.fi>
- 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
This commit is contained in:
Denis Vlasenko
221
modutils/lsmod.c
221
modutils/lsmod.c
@ -3,192 +3,77 @@
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* Mini lsmod implementation for busybox
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and
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* Nicolas Ferre <nicolas.ferre@alcove.fr> to support pre 2.1 kernels
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* (which lack the query_module() interface).
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* Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
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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 "libbb.h"
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#if !ENABLE_FEATURE_CHECK_TAINTED_MODULE
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static void check_tainted(void) { bb_putchar('\n'); }
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#else
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#define TAINT_FILENAME "/proc/sys/kernel/tainted"
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#define TAINT_PROPRIETORY_MODULE (1<<0)
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#define TAINT_FORCED_MODULE (1<<1)
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#define TAINT_UNSAFE_SMP (1<<2)
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#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
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enum {
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TAINT_PROPRIETORY_MODULE = (1 << 0),
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TAINT_FORCED_MODULE = (1 << 1),
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TAINT_UNSAFE_SMP = (1 << 2),
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};
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static void check_tainted(void)
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{
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int tainted;
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FILE *f;
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tainted = 0;
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f = fopen_for_read(TAINT_FILENAME);
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if (f) {
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fscanf(f, "%d", &tainted);
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fclose(f);
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int tainted = 0;
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char *buf = xmalloc_open_read_close("/proc/sys/kernel/tainted", NULL);
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if (buf) {
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tainted = atoi(buf);
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if (ENABLE_FEATURE_CLEAN_UP)
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free(buf);
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}
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if (tainted) {
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printf(" Tainted: %c%c%c\n",
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tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G',
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tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
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tainted & TAINT_UNSAFE_SMP ? 'S' : ' ');
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} else {
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printf(" Not tainted\n");
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puts(" Not tainted");
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}
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}
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#endif
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#if ENABLE_FEATURE_QUERY_MODULE_INTERFACE
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struct module_info
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{
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unsigned long addr;
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unsigned long size;
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unsigned long flags;
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long usecount;
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};
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int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
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enum {
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/* Values for query_module's which. */
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QM_MODULES = 1,
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QM_DEPS = 2,
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QM_REFS = 3,
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QM_SYMBOLS = 4,
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QM_INFO = 5,
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/* Bits of module.flags. */
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NEW_MOD_RUNNING = 1,
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NEW_MOD_DELETED = 2,
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NEW_MOD_AUTOCLEAN = 4,
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NEW_MOD_VISITED = 8,
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NEW_MOD_USED_ONCE = 16,
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NEW_MOD_INITIALIZING = 64
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};
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int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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{
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struct module_info info;
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char *module_names, *mn, *deps, *dn;
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size_t bufsize, depsize, nmod, count, i, j;
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module_names = deps = NULL;
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bufsize = depsize = 0;
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while (query_module(NULL, QM_MODULES, module_names, bufsize, &nmod)) {
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if (errno != ENOSPC) bb_perror_msg_and_die("QM_MODULES");
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module_names = xmalloc(bufsize = nmod);
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}
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deps = xmalloc(depsize = 256);
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printf("Module\t\t\tSize Used by");
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check_tainted();
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for (i = 0, mn = module_names; i < nmod; mn += strlen(mn) + 1, i++) {
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if (query_module(mn, QM_INFO, &info, sizeof(info), &count)) {
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if (errno == ENOENT) {
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/* The module was removed out from underneath us. */
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continue;
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}
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/* else choke */
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bb_perror_msg_and_die("module %s: QM_INFO", mn);
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}
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while (query_module(mn, QM_REFS, deps, depsize, &count)) {
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if (errno == ENOENT) {
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/* The module was removed out from underneath us. */
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continue;
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} else if (errno != ENOSPC)
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bb_perror_msg_and_die("module %s: QM_REFS", mn);
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deps = xrealloc(deps, count);
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}
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printf("%-20s%8lu%4ld", mn, info.size, info.usecount);
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if (info.flags & NEW_MOD_DELETED)
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printf(" (deleted)");
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else if (info.flags & NEW_MOD_INITIALIZING)
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printf(" (initializing)");
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else if (!(info.flags & NEW_MOD_RUNNING))
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printf(" (uninitialized)");
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else {
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if (info.flags & NEW_MOD_AUTOCLEAN)
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printf(" (autoclean) ");
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if (!(info.flags & NEW_MOD_USED_ONCE))
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printf(" (unused)");
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}
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if (count)
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printf(" [");
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for (j = 0, dn = deps; j < count; dn += strlen(dn) + 1, j++) {
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printf("%s%s", dn, (j==count-1)? "":" ");
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}
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if (count)
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bb_putchar(']');
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bb_putchar('\n');
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}
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#if ENABLE_FEATURE_CLEAN_UP
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free(module_names);
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#endif
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return 0;
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}
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#else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
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int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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{
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FILE *file = xfopen_for_read("/proc/modules");
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printf("Module Size Used by");
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check_tainted();
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#if ENABLE_FEATURE_LSMOD_PRETTY_2_6_OUTPUT
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{
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char *line;
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while ((line = xmalloc_fgets(file)) != NULL) {
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char *tok;
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tok = strtok(line, " \t");
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printf("%-19s", tok);
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tok = strtok(NULL, " \t\n");
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printf(" %8s", tok);
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tok = strtok(NULL, " \t\n");
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/* Null if no module unloading support. */
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if (tok) {
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printf(" %s", tok);
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tok = strtok(NULL, "\n");
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if (!tok)
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tok = (char*)"";
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/* New-style has commas, or -. If so,
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truncate (other fields might follow). */
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else if (strchr(tok, ',')) {
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tok = strtok(tok, "\t ");
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/* Strip trailing comma. */
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if (tok[strlen(tok)-1] == ',')
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tok[strlen(tok)-1] = '\0';
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} else if (tok[0] == '-'
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&& (tok[1] == '\0' || isspace(tok[1]))
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) {
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tok = (char*)"";
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}
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printf(" %s", tok);
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}
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bb_putchar('\n');
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free(line);
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}
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fclose(file);
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}
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#else
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xprint_and_close_file(file);
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#endif /* CONFIG_FEATURE_2_6_MODULES */
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static void check_tainted(void) { putchar('\n'); }
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#endif
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int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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{
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#if ENABLE_FEATURE_LSMOD_PRETTY_2_6_OUTPUT
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char *token[4];
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parser_t *parser = config_open("/proc/modules");
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printf("Module Size Used by"); //vda!
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check_tainted();
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if (ENABLE_FEATURE_2_4_MODULES
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&& get_linux_version_code() < KERNEL_VERSION(2,6,0)
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) {
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while (config_read(parser, token, 4, 3, "# \t", PARSE_NORMAL)) {
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if (token[3] != NULL && token[3][0] == '[') {
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token[3]++;
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token[3][strlen(token[3])-1] = '\0';
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} else
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token[3] = (char *) "";
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printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]);
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}
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} else {
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while (config_read(parser, token, 4, 4, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) {
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// N.B. token[3] is either '-' (module is not used by others)
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// or comma-separated list ended by comma
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// so trimming the trailing char is just what we need!
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token[3][strlen(token[3])-1] = '\0';
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printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]);
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}
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}
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if (ENABLE_FEATURE_CLEAN_UP)
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config_close(parser);
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#else
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check_tainted();
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xprint_and_close_file(xfopen_for_read("/proc/modules"));
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#endif
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return EXIT_SUCCESS;
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}
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#endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
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