package/busybox/patches/470-insmod_search.patch

   1 --- a/modutils/insmod.c
   2 +++ b/modutils/insmod.c
   3 @@ -9,6 +9,99 @@
   4
   5  #include "libbb.h"
   6  #include "modutils.h"
   7 +#include <sys/utsname.h>
   8 +#ifndef CONFIG_FEATURE_2_4_MODULES
   9 +#include <sys/mman.h>
  10 +#include <asm/unistd.h>
  11 +#include <sys/syscall.h>
  12 +#endif
  13 +
  14 +static char *g_filename = NULL;
  15 +
  16 +static int FAST_FUNC check_module_name_match(const char *filename, struct stat *statbuf,
  17 +                                  void *userdata, int depth)
  18 +{
  19 +       char *fullname = (char *) userdata;
  20 +       char *tmp;
  21 +
  22 +       if (fullname[0] == '\0')
  23 +               return FALSE;
  24 +
  25 +       tmp = bb_get_last_path_component_nostrip(filename);
  26 +       if (strcmp(tmp, fullname) == 0) {
  27 +               /* Stop searching if we find a match */
  28 +               g_filename = xstrdup(filename);
  29 +               return FALSE;
  30 +       }
  31 +
  32 +       return TRUE;
  33 +}
  34 +
  35 +static int find_module(char *filename)
  36 +{
  37 +       char *module_dir, real_module_dir[FILENAME_MAX];
  38 +       int len, slen, ret = ENOENT, k_version;
  39 +       struct utsname myuname;
  40 +       const char *suffix;
  41 +       struct stat st;
  42 +
  43 +       /* check the kernel version */
  44 +       if ((uname(&myuname) != 0) || (myuname.release[0] != '2'))
  45 +               return EINVAL;
  46 +
  47 +       k_version = myuname.release[2] - '0';
  48 +#if ENABLE_FEATURE_2_4_MODULES
  49 +       if (k_version <= 4)
  50 +               suffix = ".o";
  51 +       else
  52 +#endif
  53 +               suffix = ".ko";
  54 +
  55 +       len = strlen(filename);
  56 +       slen = strlen(suffix);
  57 +
  58 +       /* check for suffix and absolute path first */
  59 +       if ((len < slen + 2) || (strcmp(filename + len - slen, suffix) != 0)) {
  60 +               filename = xasprintf("%s%s", filename, suffix);
  61 +       } else {
  62 +               filename = strdup(filename);
  63 +               if ((stat(filename, &st) == 0) && S_ISREG(st.st_mode)) {
  64 +                       g_filename = filename;
  65 +                       return 0;
  66 +               }
  67 +               free(filename);
  68 +               return ENOENT;
  69 +       }
  70 +
  71 +       /* next: scan /lib/modules/<release> */
  72 +       /* Jump through hoops in case /lib/modules/`uname -r`
  73 +       * is a symlink.  We do not want recursive_action to
  74 +       * follow symlinks, but we do want to follow the
  75 +       * /lib/modules/`uname -r` dir, So resolve it ourselves
  76 +       * if it is a link... */
  77 +       module_dir = concat_path_file(CONFIG_DEFAULT_MODULES_DIR, myuname.release);
  78 +       if (realpath(module_dir, real_module_dir) != NULL) {
  79 +               free(module_dir);
  80 +               module_dir = real_module_dir;
  81 +       }
  82 +
  83 +       recursive_action(module_dir, ACTION_RECURSE,
  84 +               check_module_name_match, 0, filename, 0);
  85 +
  86 +       /* Check if we have a complete path */
  87 +       if (g_filename == NULL)
  88 +               goto done;
  89 +
  90 +       if ((stat(g_filename, &st) == 0) && S_ISREG(st.st_mode))
  91 +               ret = 0;
  92 +       else
  93 +               free(g_filename);
  94 +
  95 +done:
  96 +       free(filename);
  97 +
  98 +       return ret;
  99 +}
 100
 101  int insmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 102  int insmod_main(int argc UNUSED_PARAM, char **argv)
 103 @@ -25,9 +118,14 @@ int insmod_main(int argc UNUSED_PARAM, c
 104         if (!filename)
 105                 bb_show_usage();
 106
 107 -       rc = bb_init_module(filename, parse_cmdline_module_options(argv));
 108 +       rc = find_module(filename);
 109 +       if (rc || (g_filename == NULL))
 110 +                       goto done;
 111 +
 112 +       rc = bb_init_module(g_filename, parse_cmdline_module_options(argv));
 113         if (rc)
 114                 bb_error_msg("cannot insert '%s': %s", filename, moderror(rc));
 115 -
 116 +       free (g_filename);
 117 +done:
 118         return rc;
 119  }