161 lines
4.2 KiB
C
161 lines
4.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini lsmod implementation for busybox
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*
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* Copyright (C) 1999,2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.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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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "busybox.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <errno.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <ctype.h>
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#include <assert.h>
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#include <getopt.h>
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#include <sys/utsname.h>
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#include <sys/file.h>
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#if !defined(BB_FEATURE_LSMOD_NEW_KERNEL) && !defined(BB_FEATURE_LSMOD_OLD_KERNEL)
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#error "Must have ether BB_FEATURE_LSMOD_NEW_KERNEL or BB_FEATURE_LSMOD_OLD_KERNEL defined"
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#endif
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#ifdef BB_FEATURE_LSMOD_NEW_KERNEL
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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,
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size_t *ret);
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/* Values for query_module's which. */
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#define QM_MODULES 1
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#define QM_DEPS 2
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#define QM_REFS 3
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#define QM_SYMBOLS 4
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#define QM_INFO 5
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/* Bits of module.flags. */
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#define NEW_MOD_RUNNING 1
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#define NEW_MOD_DELETED 2
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#define NEW_MOD_AUTOCLEAN 4
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#define NEW_MOD_VISITED 8
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#define NEW_MOD_USED_ONCE 16
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#define NEW_MOD_INITIALIZING 64
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extern int lsmod_main(int argc, char **argv)
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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, nmod, count, i, j;
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module_names = xmalloc(bufsize = 256);
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deps = xmalloc(bufsize);
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if (query_module(NULL, QM_MODULES, module_names, bufsize, &nmod)) {
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error_msg_and_die("QM_MODULES: %s\n", strerror(errno));
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}
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printf("Module Size Used by\n");
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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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error_msg_and_die("module %s: QM_INFO: %s\n", mn, strerror(errno));
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}
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while (query_module(mn, QM_REFS, deps, bufsize, &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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if (errno != ENOSPC) {
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error_msg_and_die("module %s: QM_REFS: %s", mn, strerror(errno));
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}
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deps = xrealloc(deps, bufsize = count);
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}
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printf("%-20s%8lu%4ld ", mn, info.size, info.usecount);
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if (count) 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) printf("] ");
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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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printf("\n");
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}
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return( 0);
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}
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#else /*BB_FEATURE_LSMOD_OLD_KERNEL*/
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#if ! defined BB_FEATURE_USE_PROCFS
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#error Sorry, I depend on the /proc filesystem right now.
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#endif
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extern int lsmod_main(int argc, char **argv)
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{
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int fd, i;
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char line[128];
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puts("Module Size Used by");
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fflush(stdout);
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if ((fd = open("/proc/modules", O_RDONLY)) >= 0 ) {
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while ((i = read(fd, line, sizeof(line))) > 0) {
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write(fileno(stdout), line, i);
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}
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close(fd);
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return 0;
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}
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error_msg_and_die("/proc/modules: %s\n", strerror(errno));
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return 1;
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}
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#endif /*BB_FEATURE_LSMOD_OLD_KERNEL*/
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