hphp/util/kernel-version.cpp

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16 #include "hphp/util/kernel-version.h"
  17 #include "hphp/util/assertions.h"
  18 #include "hphp/util/portability.h"
  19
  20 #include <stdio.h>
  21 #include <iostream>
  22
  23 #ifdef _MSC_VER
  24 #include <Windows.h>
  25 #else
  26 #include <unistd.h>
  27 #include <sys/utsname.h>
  28 #endif
  29
  30 namespace HPHP {
  31
  32 void KernelVersion::parse(const char* s) {
  33   char dashdot[2];
  34   // Assume no part of the uname string will be more than 128 chars
  35   char release[128];
  36   release[0] = 0;
  37   char build[128];
  38   build[0] = 0;
  39   sscanf(s,
  40          "%d.%d%1[.-]%127[A-Za-z0-9]-%127[A-Za-z0-9]_fbk%d_",
  41          &m_major, &m_minor, dashdot, release, build, &m_fbk);
  42   m_release_str = release[0] == 0 ? "" : (const char*) release;
  43   m_build_str = build[0] == 0 ? "" : (const char*) build;
  44   // Populate the int-based release and build, if we have all digits in them
  45   if (isNumber(m_release_str)) {
  46     m_release = atoi(m_release_str.c_str());
  47   }
  48   if (isNumber(m_build_str)) {
  49     m_build = atoi(m_build_str.c_str());
  50   }
  51 }
  52
  53 KernelVersion::KernelVersion() {
  54 #ifdef _MSC_VER
  55   OSVERSIONINFO verInf;
  56   verInf.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
  57   GetVersionEx(&verInf);
  58   m_major = verInf.dwMajorVersion;
  59   m_minor = verInf.dwMinorVersion;
  60   m_build = verInf.dwBuildNumber;
  61   m_release = verInf.dwPlatformId;
  62 #else
  63   struct utsname uts;
  64   DEBUG_ONLY int err = uname(&uts);
  65   assert(err == 0);
  66   parse(uts.release);
  67 #endif
  68 }
  69
  70 KernelVersion::KernelVersion(const char* s) {
  71   m_major = m_minor = m_fbk = m_release = m_build = -1;
  72   m_release_str = m_build_str = "";
  73   parse(s);
  74 }
  75
  76 bool KernelVersion::isNumber(const std::string s) {
  77   return !s.empty() && s.find_first_not_of("0123456789") == std::string::npos;
  78 }
  79
  80 }