blob: ee85fb0fb0a7ce24de149869152d21e05eb1e4bf
| 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 | * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com> |
| 7 | * |
| 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| 9 | */ |
| 10 | //config:config LSMOD |
| 11 | //config: bool "lsmod" |
| 12 | //config: default n |
| 13 | //config: depends on !MODPROBE_SMALL |
| 14 | //config: select PLATFORM_LINUX |
| 15 | //config: help |
| 16 | //config: lsmod is used to display a list of loaded modules. |
| 17 | //config: |
| 18 | //config:config FEATURE_LSMOD_PRETTY_2_6_OUTPUT |
| 19 | //config: bool "Pretty output" |
| 20 | //config: default n |
| 21 | //config: depends on LSMOD |
| 22 | //config: select PLATFORM_LINUX |
| 23 | //config: help |
| 24 | //config: This option makes output format of lsmod adjusted to |
| 25 | //config: the format of module-init-tools for Linux kernel 2.6. |
| 26 | //config: Increases size somewhat. |
| 27 | |
| 28 | //applet:IF_LSMOD(APPLET(lsmod, BB_DIR_SBIN, BB_SUID_DROP)) |
| 29 | |
| 30 | //kbuild:lib-$(CONFIG_LSMOD) += lsmod.o modutils.o |
| 31 | |
| 32 | //usage:#if !ENABLE_MODPROBE_SMALL |
| 33 | //usage:#define lsmod_trivial_usage |
| 34 | //usage: "" |
| 35 | //usage:#define lsmod_full_usage "\n\n" |
| 36 | //usage: "List the currently loaded kernel modules" |
| 37 | //usage:#endif |
| 38 | |
| 39 | #include "libbb.h" |
| 40 | #include "unicode.h" |
| 41 | |
| 42 | #if ENABLE_FEATURE_CHECK_TAINTED_MODULE |
| 43 | enum { |
| 44 | TAINT_PROPRIETORY_MODULE = (1 << 0), |
| 45 | TAINT_FORCED_MODULE = (1 << 1), |
| 46 | TAINT_UNSAFE_SMP = (1 << 2), |
| 47 | }; |
| 48 | |
| 49 | static void check_tainted(void) |
| 50 | { |
| 51 | int tainted = 0; |
| 52 | char *buf = xmalloc_open_read_close("/proc/sys/kernel/tainted", NULL); |
| 53 | if (buf) { |
| 54 | tainted = atoi(buf); |
| 55 | if (ENABLE_FEATURE_CLEAN_UP) |
| 56 | free(buf); |
| 57 | } |
| 58 | |
| 59 | if (tainted) { |
| 60 | printf(" Tainted: %c%c%c\n", |
| 61 | tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G', |
| 62 | tainted & TAINT_FORCED_MODULE ? 'F' : ' ', |
| 63 | tainted & TAINT_UNSAFE_SMP ? 'S' : ' '); |
| 64 | } else { |
| 65 | puts(" Not tainted"); |
| 66 | } |
| 67 | } |
| 68 | #else |
| 69 | static void check_tainted(void) { putchar('\n'); } |
| 70 | #endif |
| 71 | |
| 72 | int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 73 | int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) |
| 74 | { |
| 75 | #if ENABLE_FEATURE_LSMOD_PRETTY_2_6_OUTPUT |
| 76 | char *token[4]; |
| 77 | parser_t *parser = config_open("/proc/modules"); |
| 78 | init_unicode(); |
| 79 | |
| 80 | printf("%-24sSize Used by", "Module"); |
| 81 | check_tainted(); |
| 82 | |
| 83 | if (ENABLE_FEATURE_2_4_MODULES |
| 84 | && get_linux_version_code() < KERNEL_VERSION(2,6,0) |
| 85 | ) { |
| 86 | while (config_read(parser, token, 4, 3, "# \t", PARSE_NORMAL)) { |
| 87 | if (token[3] != NULL && token[3][0] == '[') { |
| 88 | token[3]++; |
| 89 | token[3][strlen(token[3])-1] = '\0'; |
| 90 | } else |
| 91 | token[3] = (char *) ""; |
| 92 | # if ENABLE_UNICODE_SUPPORT |
| 93 | { |
| 94 | uni_stat_t uni_stat; |
| 95 | char *uni_name = unicode_conv_to_printable(&uni_stat, token[0]); |
| 96 | unsigned pad_len = (uni_stat.unicode_width > 19) ? 0 : 19 - uni_stat.unicode_width; |
| 97 | printf("%s%*s %8s %2s %s\n", uni_name, pad_len, "", token[1], token[2], token[3]); |
| 98 | free(uni_name); |
| 99 | } |
| 100 | # else |
| 101 | printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]); |
| 102 | # endif |
| 103 | } |
| 104 | } else { |
| 105 | while (config_read(parser, token, 4, 4, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) { |
| 106 | // N.B. token[3] is either '-' (module is not used by others) |
| 107 | // or comma-separated list ended by comma |
| 108 | // so trimming the trailing char is just what we need! |
| 109 | if (token[3][0]) |
| 110 | token[3][strlen(token[3]) - 1] = '\0'; |
| 111 | # if ENABLE_UNICODE_SUPPORT |
| 112 | { |
| 113 | uni_stat_t uni_stat; |
| 114 | char *uni_name = unicode_conv_to_printable(&uni_stat, token[0]); |
| 115 | unsigned pad_len = (uni_stat.unicode_width > 19) ? 0 : 19 - uni_stat.unicode_width; |
| 116 | printf("%s%*s %8s %2s %s\n", uni_name, pad_len, "", token[1], token[2], token[3]); |
| 117 | free(uni_name); |
| 118 | } |
| 119 | # else |
| 120 | printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]); |
| 121 | # endif |
| 122 | } |
| 123 | } |
| 124 | if (ENABLE_FEATURE_CLEAN_UP) |
| 125 | config_close(parser); |
| 126 | #else |
| 127 | check_tainted(); |
| 128 | xprint_and_close_file(xfopen_for_read("/proc/modules")); |
| 129 | #endif |
| 130 | return EXIT_SUCCESS; |
| 131 | } |
| 132 |