modutils/lsmod.c

   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 tarball for details.
   9  */
  10 #include "libbb.h"
  11 #include "unicode.h"
  12
  13 #if ENABLE_FEATURE_CHECK_TAINTED_MODULE
  14 enum {
  15         TAINT_PROPRIETORY_MODULE = (1 << 0),
  16         TAINT_FORCED_MODULE      = (1 << 1),
  17         TAINT_UNSAFE_SMP         = (1 << 2),
  18 };
  19
  20 static void check_tainted(void)
  21 {
  22         int tainted = 0;
  23         char *buf = xmalloc_open_read_close("/proc/sys/kernel/tainted", NULL);
  24         if (buf) {
  25                 tainted = atoi(buf);
  26                 if (ENABLE_FEATURE_CLEAN_UP)
  27                         free(buf);
  28         }
  29
  30         if (tainted) {
  31                 printf("    Tainted: %c%c%c\n",
  32                                 tainted & TAINT_PROPRIETORY_MODULE      ? 'P' : 'G',
  33                                 tainted & TAINT_FORCED_MODULE           ? 'F' : ' ',
  34                                 tainted & TAINT_UNSAFE_SMP              ? 'S' : ' ');
  35         } else {
  36                 puts("    Not tainted");
  37         }
  38 }
  39 #else
  40 static void check_tainted(void) { putchar('\n'); }
  41 #endif
  42
  43 int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  44 int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  45 {
  46 #if ENABLE_FEATURE_LSMOD_PRETTY_2_6_OUTPUT
  47         char *token[4];
  48         parser_t *parser = config_open("/proc/modules");
  49         init_unicode();
  50
  51         printf("%-24sSize  Used by", "Module");
  52         check_tainted();
  53
  54         if (ENABLE_FEATURE_2_4_MODULES
  55          && get_linux_version_code() < KERNEL_VERSION(2,6,0)
  56         ) {
  57                 while (config_read(parser, token, 4, 3, "# \t", PARSE_NORMAL)) {
  58                         if (token[3] != NULL && token[3][0] == '[') {
  59                                 token[3]++;
  60                                 token[3][strlen(token[3])-1] = '\0';
  61                         } else
  62                                 token[3] = (char *) "";
  63 # if ENABLE_UNICODE_SUPPORT
  64                         {
  65                                 uni_stat_t uni_stat;
  66                                 char *uni_name = unicode_conv_to_printable(&uni_stat, token[0]);
  67                                 unsigned pad_len = (uni_stat.unicode_width > 19) ? 0 : 19 - uni_stat.unicode_width;
  68                                 printf("%s%*s %8s %2s %s\n", uni_name, pad_len, "", token[1], token[2], token[3]);
  69                                 free(uni_name);
  70                         }
  71 # else
  72                         printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]);
  73 # endif
  74                 }
  75         } else {
  76                 while (config_read(parser, token, 4, 4, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) {
  77                         // N.B. token[3] is either '-' (module is not used by others)
  78                         // or comma-separated list ended by comma
  79                         // so trimming the trailing char is just what we need!
  80                         token[3][strlen(token[3])-1] = '\0';
  81 # if ENABLE_UNICODE_SUPPORT
  82                         {
  83                                 uni_stat_t uni_stat;
  84                                 char *uni_name = unicode_conv_to_printable(&uni_stat, token[0]);
  85                                 unsigned pad_len = (uni_stat.unicode_width > 19) ? 0 : 19 - uni_stat.unicode_width;
  86                                 printf("%s%*s %8s %2s %s\n", uni_name, pad_len, "", token[1], token[2], token[3]);
  87                                 free(uni_name);
  88                         }
  89 # else
  90                         printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]);
  91 # endif
  92                 }
  93         }
  94         if (ENABLE_FEATURE_CLEAN_UP)
  95                 config_close(parser);
  96 #else
  97         check_tainted();
  98         xprint_and_close_file(xfopen_for_read("/proc/modules"));
  99 #endif
 100         return EXIT_SUCCESS;
 101 }