toolkit/crashreporter/linux_utils.cc

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "common/linux/linux_libc_support.h"
   7 #include "linux_utils.h"
   8
   9 bool ElfFileSoVersion(const char* mapping_name, uint32_t* version_components) {
  10   if (!version_components) {
  11     return false;
  12   }
  13
  14   // We found no version so just report 0
  15   const char* so_version = my_strstr(mapping_name, ".so.");
  16   if (so_version == nullptr) {
  17     return true;
  18   }
  19
  20   char tmp[12];  // 11 for maximum representation of UINT32T_MAX + \0 ?
  21   size_t current_position = 0;
  22   size_t next_tmp = 0;
  23   tmp[0] = '\0';
  24   for (size_t so_version_pos = 0; so_version_pos <= my_strlen(so_version);
  25        ++so_version_pos) {
  26     // We can't have more than four: MAJOR.minor.release.patch
  27     if (current_position == 4) {
  28       break;
  29     }
  30
  31     char c = so_version[so_version_pos];
  32     if (c != '.') {
  33       if ((c <= '9' && c >= '0')) {
  34         tmp[next_tmp] = c;
  35         tmp[next_tmp + 1] = '\0';
  36         ++next_tmp;
  37       }
  38
  39       if (so_version[so_version_pos + 1] != '\0') {
  40         continue;
  41       }
  42     }
  43
  44     if (my_strlen(tmp) > 0) {
  45       int t;
  46       if (!my_strtoui(&t, tmp)) {
  47         return false;
  48       }
  49       uint32_t casted_tmp = (uint32_t)t;
  50       version_components[current_position] = casted_tmp;
  51       ++current_position;
  52     }
  53
  54     tmp[0] = '\0';
  55     next_tmp = 0;
  56   }
  57
  58   return true;
  59 }