install-utils.inc

   1 <?php
   2
   3 /**
   4  * This file contains functions used by the install script (config/index.php)
   5  * and maintenance scripts. It is not loaded in normal web requests.
   6  *
   7  * @file
   8  */
   9
  10 function install_version_checks() {
  11         # We dare not turn output buffer _off_ since this will break completely
  12         # if PHP is globally configured to run through a gzip filter.
  13         @ob_implicit_flush( true );
  14
  15         if( !function_exists( 'version_compare' ) ) {
  16                 # version_compare was introduced in 4.1.0
  17                 echo "Your PHP version is much too old; 4.0.x will _not_ work. 5.0.0 or higher is required. ABORTING.\n";
  18                 die( -1 );
  19         }
  20         if( version_compare( phpversion(), '5.0.0' ) < 0 ) {
  21                 echo "PHP 5.0.0 or higher is required. If PHP 5 is available only when \n".
  22    "PHP files have a .php5 extension, please navigate to <a href=\"index.php5\">index.php5</a> \n".
  23    "to continue installation. ABORTING.\n";
  24                 die( -1 );
  25         }
  26
  27         // Test for PHP bug which breaks PHP 5.0.x on 64-bit...
  28         // As of 1.8 this breaks lots of common operations instead
  29         // of just some rare ones like export.
  30         $borked = str_replace( 'a', 'b', array( -1 => -1 ) );
  31         if( !isset( $borked[-1] ) ) {
  32                 echo "PHP 5.0.x is buggy on your 64-bit system; you must upgrade to PHP 5.1.x\n" .
  33                         "or higher. ABORTING. (http://bugs.php.net/bug.php?id=34879 for details)\n";
  34                 die( -1 );
  35         }
  36
  37         global $wgCommandLineMode;
  38         $wgCommandLineMode = true;
  39         umask( 000 );
  40         @set_time_limit( 0 );
  41 }
  42
  43 function copyfile( $sdir, $name, $ddir, $perms = 0664 ) {
  44         copyfileto( $sdir, $name, $ddir, $name, $perms );
  45 }
  46
  47 function copyfileto( $sdir, $sname, $ddir, $dname, $perms = 0664 ) {
  48         global $wgInstallOwner, $wgInstallGroup;
  49
  50         $d = "{$ddir}/{$dname}";
  51         if ( copy( "{$sdir}/{$sname}", $d ) ) {
  52                 if ( isset( $wgInstallOwner ) ) { chown( $d, $wgInstallOwner ); }
  53                 if ( isset( $wgInstallGroup ) ) { chgrp( $d, $wgInstallGroup ); }
  54                 chmod( $d, $perms );
  55                 # print "Copied \"{$sname}\" to \"{$d}\".\n";
  56         } else {
  57                 print "Failed to copy file \"{$sname}\" to \"{$ddir}/{$dname}\".\n";
  58                 exit();
  59         }
  60 }
  61
  62 function copydirectory( $source, $dest ) {
  63         $handle = opendir( $source );
  64         while ( false !== ( $f = readdir( $handle ) ) ) {
  65                 $fullname = "$source/$f";
  66                 if ( $f{0} != '.' && is_file( $fullname ) ) {
  67                         copyfile( $source, $f, $dest );
  68                 }
  69         }
  70 }
  71
  72 function readconsole( $prompt = '' ) {
  73         static $isatty = null;
  74         if ( is_null( $isatty ) ) {
  75                 if ( !function_exists( 'posix_isatty' ) || posix_isatty( 0 /*STDIN*/ ) ) {
  76                         $isatty = true;
  77                 } else {
  78                         $isatty = false;
  79                 }
  80         }
  81
  82         if ( $isatty && function_exists( 'readline' ) ) {
  83                 return readline( $prompt );
  84         } else {
  85                 if ( $isatty ) {
  86                         print $prompt;
  87                 }
  88                 if ( feof( STDIN ) ) {
  89                         return false;
  90                 }
  91                 $st = fgets(STDIN, 1024);
  92                 if ($st === false) return false;
  93                 $resp = trim( $st );
  94                 return $resp;
  95         }
  96 }
  97
  98 #
  99 # Read and execute SQL commands from a file
 100 #
 101 function dbsource( $fname, $db = false ) {
 102         if ( !$db ) {
 103                 // Try $wgDatabase, which is used in the install and update scripts
 104                 global $wgDatabase;
 105                 if ( isset( $wgDatabase ) ) {
 106                         $db = $wgDatabase;
 107                 } else {
 108                         // No? Well, we must be outside of those scripts, so use the standard method
 109                         $db = wfGetDB( DB_MASTER );
 110                 }
 111         }
 112         $error = $db->sourceFile( $fname );
 113         if ( $error !== true ) {
 114                 print $error;
 115                 exit(1);
 116         }
 117 }
 118
 119 /**
 120  * Get the value of session.save_path
 121  *
 122  * Per http://www.php.net/manual/en/ref.session.php#ini.session.save-path,
 123  * this might have some additional preceding parts which need to be
 124  * ditched
 125  *
 126  * @return string
 127  */
 128 function mw_get_session_save_path() {
 129         $path = ini_get( 'session.save_path' );
 130         $path = substr( $path, strrpos( $path, ';' ) );
 131         return $path;
 132 }
 133
 134 /**
 135  * Is dl() available to us?
 136  *
 137  * According to http://www.php.net/manual/en/function.dl.php, dl()
 138  * is *not* available when `enable_dl` is off, or under `safe_mode`
 139  *
 140  * @return bool
 141  */
 142 function mw_have_dl() {
 143         return function_exists( 'dl' )
 144                 && is_callable( 'dl' )
 145                 && wfIniGetBool( 'enable_dl' )
 146                 && !wfIniGetBool( 'safe_mode' );
 147 }