scratch – Blame information for rev 115
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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 115 | office | 1 | <?php |
| 2 | |||
| 3 | /* |
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| 4 | * This file is part of the Symfony package. |
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| 5 | * |
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| 6 | * (c) Fabien Potencier <fabien@symfony.com> |
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| 7 | * |
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| 8 | * For the full copyright and license information, please view the LICENSE |
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| 9 | * file that was distributed with this source code. |
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| 10 | */ |
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| 11 | |||
| 12 | namespace Symfony\Component\Process\Pipes; |
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| 13 | |||
| 14 | use Symfony\Component\Process\Exception\InvalidArgumentException; |
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| 15 | |||
| 16 | /** |
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| 17 | * @author Romain Neutron <imprec@gmail.com> |
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| 18 | * |
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| 19 | * @internal |
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| 20 | */ |
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| 21 | abstract class AbstractPipes implements PipesInterface |
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| 22 | { |
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| 23 | /** @var array */ |
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| 24 | public $pipes = array(); |
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| 25 | |||
| 26 | /** @var string */ |
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| 27 | private $inputBuffer = ''; |
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| 28 | /** @var resource|scalar|\Iterator|null */ |
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| 29 | private $input; |
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| 30 | /** @var bool */ |
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| 31 | private $blocked = true; |
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| 32 | |||
| 33 | public function __construct($input) |
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| 34 | { |
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| 35 | if (is_resource($input) || $input instanceof \Iterator) { |
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| 36 | $this->input = $input; |
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| 37 | } elseif (is_string($input)) { |
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| 38 | $this->inputBuffer = $input; |
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| 39 | } else { |
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| 40 | $this->inputBuffer = (string) $input; |
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| 41 | } |
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| 42 | } |
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| 43 | |||
| 44 | /** |
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| 45 | * {@inheritdoc} |
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| 46 | */ |
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| 47 | public function close() |
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| 48 | { |
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| 49 | foreach ($this->pipes as $pipe) { |
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| 50 | fclose($pipe); |
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| 51 | } |
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| 52 | $this->pipes = array(); |
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| 53 | } |
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| 54 | |||
| 55 | /** |
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| 56 | * Returns true if a system call has been interrupted. |
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| 57 | * |
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| 58 | * @return bool |
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| 59 | */ |
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| 60 | protected function hasSystemCallBeenInterrupted() |
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| 61 | { |
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| 62 | $lastError = error_get_last(); |
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| 63 | |||
| 64 | // stream_select returns false when the `select` system call is interrupted by an incoming signal |
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| 65 | return isset($lastError['message']) && false !== stripos($lastError['message'], 'interrupted system call'); |
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| 66 | } |
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| 67 | |||
| 68 | /** |
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| 69 | * Unblocks streams. |
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| 70 | */ |
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| 71 | protected function unblock() |
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| 72 | { |
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| 73 | if (!$this->blocked) { |
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| 74 | return; |
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| 75 | } |
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| 76 | |||
| 77 | foreach ($this->pipes as $pipe) { |
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| 78 | stream_set_blocking($pipe, 0); |
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| 79 | } |
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| 80 | if (is_resource($this->input)) { |
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| 81 | stream_set_blocking($this->input, 0); |
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| 82 | } |
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| 83 | |||
| 84 | $this->blocked = false; |
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| 85 | } |
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| 86 | |||
| 87 | /** |
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| 88 | * Writes input to stdin. |
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| 89 | * |
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| 90 | * @throws InvalidArgumentException When an input iterator yields a non supported value |
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| 91 | */ |
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| 92 | protected function write() |
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| 93 | { |
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| 94 | if (!isset($this->pipes[0])) { |
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| 95 | return; |
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| 96 | } |
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| 97 | $input = $this->input; |
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| 98 | |||
| 99 | if ($input instanceof \Iterator) { |
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| 100 | if (!$input->valid()) { |
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| 101 | $input = null; |
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| 102 | } elseif (is_resource($input = $input->current())) { |
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| 103 | stream_set_blocking($input, 0); |
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| 104 | } elseif (!isset($this->inputBuffer[0])) { |
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| 105 | if (!is_string($input)) { |
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| 106 | if (!is_scalar($input)) { |
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| 107 | throw new InvalidArgumentException(sprintf('%s yielded a value of type "%s", but only scalars and stream resources are supported', get_class($this->input), gettype($input))); |
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| 108 | } |
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| 109 | $input = (string) $input; |
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| 110 | } |
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| 111 | $this->inputBuffer = $input; |
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| 112 | $this->input->next(); |
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| 113 | $input = null; |
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| 114 | } else { |
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| 115 | $input = null; |
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| 116 | } |
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| 117 | } |
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| 118 | |||
| 119 | $r = $e = array(); |
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| 120 | $w = array($this->pipes[0]); |
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| 121 | |||
| 122 | // let's have a look if something changed in streams |
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| 123 | if (false === $n = @stream_select($r, $w, $e, 0, 0)) { |
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| 124 | return; |
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| 125 | } |
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| 126 | |||
| 127 | foreach ($w as $stdin) { |
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| 128 | if (isset($this->inputBuffer[0])) { |
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| 129 | $written = fwrite($stdin, $this->inputBuffer); |
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| 130 | $this->inputBuffer = substr($this->inputBuffer, $written); |
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| 131 | if (isset($this->inputBuffer[0])) { |
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| 132 | return array($this->pipes[0]); |
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| 133 | } |
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| 134 | } |
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| 135 | |||
| 136 | if ($input) { |
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| 137 | for (;;) { |
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| 138 | $data = fread($input, self::CHUNK_SIZE); |
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| 139 | if (!isset($data[0])) { |
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| 140 | break; |
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| 141 | } |
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| 142 | $written = fwrite($stdin, $data); |
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| 143 | $data = substr($data, $written); |
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| 144 | if (isset($data[0])) { |
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| 145 | $this->inputBuffer = $data; |
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| 146 | |||
| 147 | return array($this->pipes[0]); |
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| 148 | } |
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| 149 | } |
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| 150 | if (feof($input)) { |
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| 151 | if ($this->input instanceof \Iterator) { |
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| 152 | $this->input->next(); |
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| 153 | } else { |
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| 154 | $this->input = null; |
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| 155 | } |
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| 156 | } |
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| 157 | } |
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| 158 | } |
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| 159 | |||
| 160 | // no input to read on resource, buffer is empty |
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| 161 | if (!isset($this->inputBuffer[0]) && !($this->input instanceof \Iterator ? $this->input->valid() : $this->input)) { |
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| 162 | $this->input = null; |
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| 163 | fclose($this->pipes[0]); |
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| 164 | unset($this->pipes[0]); |
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| 165 | } elseif (!$w) { |
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| 166 | return array($this->pipes[0]); |
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| 167 | } |
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| 168 | } |
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| 169 | } |