1/* vi: set sw=4 ts=4: */ 2/* 3 * Mini lsmod implementation for busybox 4 * 5 * Copyright (C) 1999,2000,2001 by Lineo, inc. 6 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org> 7 * 8 * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and 9 * Nicolas Ferre <nicolas.ferre@alcove.fr> to support pre 2.1 kernels 10 * (which lack the query_module() interface). 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 25 * 26 */ 27 28#include <stdlib.h> 29#include <stdio.h> 30#include <string.h> 31#include <stddef.h> 32#include <errno.h> 33#include <unistd.h> 34#include <dirent.h> 35#include <ctype.h> 36#include <assert.h> 37#include <getopt.h> 38#include <sys/utsname.h> 39#include <sys/file.h> 40#include "busybox.h" 41 42 43 44#ifdef BB_FEATURE_NEW_MODULE_INTERFACE 45 46struct module_info 47{ 48 unsigned long addr; 49 unsigned long size; 50 unsigned long flags; 51 long usecount; 52}; 53 54 55int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret); 56 57/* Values for query_module's which. */ 58static const int QM_MODULES = 1; 59static const int QM_DEPS = 2; 60static const int QM_REFS = 3; 61static const int QM_SYMBOLS = 4; 62static const int QM_INFO = 5; 63 64/* Bits of module.flags. */ 65static const int NEW_MOD_RUNNING = 1; 66static const int NEW_MOD_DELETED = 2; 67static const int NEW_MOD_AUTOCLEAN = 4; 68static const int NEW_MOD_VISITED = 8; 69static const int NEW_MOD_USED_ONCE = 16; 70static const int NEW_MOD_INITIALIZING = 64; 71 72static int my_query_module(const char *name, int which, void **buf, 73 size_t *bufsize, size_t *ret) 74{ 75 int my_ret; 76 77 my_ret = query_module(name, which, *buf, *bufsize, ret); 78 79 if (my_ret == -1 && errno == ENOSPC) { 80 *buf = xrealloc(*buf, *ret); 81 *bufsize = *ret; 82 83 my_ret = query_module(name, which, *buf, *bufsize, ret); 84 } 85 86 return my_ret; 87} 88 89extern int lsmod_main(int argc, char **argv) 90{ 91 struct module_info info; 92 char *module_names, *mn, *deps, *dn; 93 size_t bufsize, depsize, nmod, count, i, j; 94 95 module_names = xmalloc(bufsize = 256); 96 if (my_query_module(NULL, QM_MODULES, (void **)&module_names, &bufsize, 97 &nmod)) { 98 perror_msg_and_die("QM_MODULES"); 99 } 100 101 deps = xmalloc(depsize = 256); 102 printf("Module Size Used by\n"); 103 for (i = 0, mn = module_names; i < nmod; mn += strlen(mn) + 1, i++) { 104 if (query_module(mn, QM_INFO, &info, sizeof(info), &count)) { 105 if (errno == ENOENT) { 106 /* The module was removed out from underneath us. */ 107 continue; 108 } 109 /* else choke */ 110 perror_msg_and_die("module %s: QM_INFO", mn); 111 } 112 if (my_query_module(mn, QM_REFS, (void **)&deps, &depsize, &count)) { 113 if (errno == ENOENT) { 114 /* The module was removed out from underneath us. */ 115 continue; 116 } 117 perror_msg_and_die("module %s: QM_REFS", mn); 118 } 119 printf("%-20s%8lu%4ld ", mn, info.size, info.usecount); 120 if (info.flags & NEW_MOD_DELETED) 121 printf("(deleted)"); 122 else if (info.flags & NEW_MOD_INITIALIZING) 123 printf("(initializing)"); 124 else if (!(info.flags & NEW_MOD_RUNNING)) 125 printf("(uninitialized)"); 126 else { 127 if (info.flags & NEW_MOD_AUTOCLEAN) 128 printf("(autoclean) "); 129 if (!(info.flags & NEW_MOD_USED_ONCE)) 130 printf("(unused)"); 131 } 132 if (count) printf("["); 133 for (j = 0, dn = deps; j < count; dn += strlen(dn) + 1, j++) { 134 printf("%s%s", dn, (j==count-1)? "":" "); 135 } 136 if (count) printf("] "); 137 138 printf("\n"); 139 } 140 141 142 return( 0); 143} 144 145#else /*BB_FEATURE_OLD_MODULE_INTERFACE*/ 146 147extern int lsmod_main(int argc, char **argv) 148{ 149 int fd, i; 150 char line[128]; 151 152 puts("Module Size Used by"); 153 fflush(stdout); 154 155 if ((fd = open("/proc/modules", O_RDONLY)) >= 0 ) { 156 while ((i = read(fd, line, sizeof(line))) > 0) { 157 write(fileno(stdout), line, i); 158 } 159 close(fd); 160 return 0; 161 } 162 perror_msg_and_die("/proc/modules"); 163 return 1; 164} 165 166#endif /*BB_FEATURE_OLD_MODULE_INTERFACE*/ 167