1/* vi: set sw=4 ts=4: */ 2/* 3 * Mini lsmod implementation for busybox 4 * 5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> 6 * 7 * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and 8 * Nicolas Ferre <nicolas.ferre@alcove.fr> to support pre 2.1 kernels 9 * (which lack the query_module() interface). 10 * 11 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. 12 */ 13 14#include "libbb.h" 15 16 17#if !ENABLE_FEATURE_CHECK_TAINTED_MODULE 18static void check_tainted(void) { puts(""); } 19#else 20#define TAINT_FILENAME "/proc/sys/kernel/tainted" 21#define TAINT_PROPRIETORY_MODULE (1<<0) 22#define TAINT_FORCED_MODULE (1<<1) 23#define TAINT_UNSAFE_SMP (1<<2) 24 25static void check_tainted(void) 26{ 27 int tainted; 28 FILE *f; 29 30 tainted = 0; 31 if ((f = fopen(TAINT_FILENAME, "r"))) { 32 fscanf(f, "%d", &tainted); 33 fclose(f); 34 } 35 if (f && tainted) { 36 printf(" Tainted: %c%c%c\n", 37 tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G', 38 tainted & TAINT_FORCED_MODULE ? 'F' : ' ', 39 tainted & TAINT_UNSAFE_SMP ? 'S' : ' '); 40 } 41 else { 42 printf(" Not tainted\n"); 43 } 44} 45#endif 46 47#if ENABLE_FEATURE_QUERY_MODULE_INTERFACE 48 49struct module_info 50{ 51 unsigned long addr; 52 unsigned long size; 53 unsigned long flags; 54 long usecount; 55}; 56 57 58int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret); 59 60enum { 61/* Values for query_module's which. */ 62 QM_MODULES = 1, 63 QM_DEPS = 2, 64 QM_REFS = 3, 65 QM_SYMBOLS = 4, 66 QM_INFO = 5, 67 68/* Bits of module.flags. */ 69 NEW_MOD_RUNNING = 1, 70 NEW_MOD_DELETED = 2, 71 NEW_MOD_AUTOCLEAN = 4, 72 NEW_MOD_VISITED = 8, 73 NEW_MOD_USED_ONCE = 16, 74 NEW_MOD_INITIALIZING = 64 75}; 76 77int lsmod_main(int argc, char **argv); 78int lsmod_main(int argc, char **argv) 79{ 80 struct module_info info; 81 char *module_names, *mn, *deps, *dn; 82 size_t bufsize, depsize, nmod, count, i, j; 83 84 module_names = deps = NULL; 85 bufsize = depsize = 0; 86 while (query_module(NULL, QM_MODULES, module_names, bufsize, &nmod)) { 87 if (errno != ENOSPC) bb_perror_msg_and_die("QM_MODULES"); 88 module_names = xmalloc(bufsize = nmod); 89 } 90 91 deps = xmalloc(depsize = 256); 92 printf("Module\t\t\tSize Used by"); 93 check_tainted(); 94 95 for (i = 0, mn = module_names; i < nmod; mn += strlen(mn) + 1, i++) { 96 if (query_module(mn, QM_INFO, &info, sizeof(info), &count)) { 97 if (errno == ENOENT) { 98 /* The module was removed out from underneath us. */ 99 continue; 100 } 101 /* else choke */ 102 bb_perror_msg_and_die("module %s: QM_INFO", mn); 103 } 104 while (query_module(mn, QM_REFS, deps, depsize, &count)) { 105 if (errno == ENOENT) { 106 /* The module was removed out from underneath us. */ 107 continue; 108 } else if (errno != ENOSPC) 109 bb_perror_msg_and_die("module %s: QM_REFS", mn); 110 deps = xrealloc(deps, count); 111 } 112 printf("%-20s%8lu%4ld", mn, info.size, info.usecount); 113 if (info.flags & NEW_MOD_DELETED) 114 printf(" (deleted)"); 115 else if (info.flags & NEW_MOD_INITIALIZING) 116 printf(" (initializing)"); 117 else if (!(info.flags & NEW_MOD_RUNNING)) 118 printf(" (uninitialized)"); 119 else { 120 if (info.flags & NEW_MOD_AUTOCLEAN) 121 printf(" (autoclean) "); 122 if (!(info.flags & NEW_MOD_USED_ONCE)) 123 printf(" (unused)"); 124 } 125 if (count) printf(" ["); 126 for (j = 0, dn = deps; j < count; dn += strlen(dn) + 1, j++) { 127 printf("%s%s", dn, (j==count-1)? "":" "); 128 } 129 if (count) printf("]"); 130 131 puts(""); 132 } 133 134#if ENABLE_FEATURE_CLEAN_UP 135 free(module_names); 136#endif 137 138 return 0; 139} 140 141#else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */ 142 143int lsmod_main(int argc, char **argv); 144int lsmod_main(int argc, char **argv) 145{ 146 FILE *file = xfopen("/proc/modules", "r"); 147 148 printf("Module Size Used by"); 149 check_tainted(); 150#if defined(CONFIG_FEATURE_LSMOD_PRETTY_2_6_OUTPUT) 151 { 152 char *line; 153 while ((line = xmalloc_fgets(file)) != NULL) { 154 char *tok; 155 156 tok = strtok(line, " \t"); 157 printf("%-19s", tok); 158 tok = strtok(NULL, " \t\n"); 159 printf(" %8s", tok); 160 tok = strtok(NULL, " \t\n"); 161 /* Null if no module unloading support. */ 162 if (tok) { 163 printf(" %s", tok); 164 tok = strtok(NULL, "\n"); 165 if (!tok) 166 tok = (char*)""; 167 /* New-style has commas, or -. If so, 168 truncate (other fields might follow). */ 169 else if (strchr(tok, ',')) { 170 tok = strtok(tok, "\t "); 171 /* Strip trailing comma. */ 172 if (tok[strlen(tok)-1] == ',') 173 tok[strlen(tok)-1] = '\0'; 174 } else if (tok[0] == '-' 175 && (tok[1] == '\0' || isspace(tok[1])) 176 ) { 177 tok = (char*)""; 178 } 179 printf(" %s", tok); 180 } 181 puts(""); 182 free(line); 183 } 184 fclose(file); 185 } 186#else 187 xprint_and_close_file(file); 188#endif /* CONFIG_FEATURE_2_6_MODULES */ 189 return EXIT_SUCCESS; 190} 191 192#endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */ 193