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ext/standard/file: disable the read buffer in file_get_contents() #8547

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ext/standard/file: disable the read buffer in file_get_contents() #8547

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6 changes: 6 additions & 0 deletions ext/standard/file.c
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Original file line number Diff line number Diff line change
Expand Up @@ -566,6 +566,12 @@ PHP_FUNCTION(file_get_contents)
RETURN_FALSE;
}

/* disabling the read buffer allows doing the whole transfer
in just one read() system call */
if (php_stream_is(stream, PHP_STREAM_IS_STDIO)) {
php_stream_set_option(stream, PHP_STREAM_OPTION_READ_BUFFER, PHP_STREAM_BUFFER_NONE, NULL);
}

if (offset != 0 && php_stream_seek(stream, offset, ((offset > 0) ? SEEK_SET : SEEK_END)) < 0) {
php_error_docref(NULL, E_WARNING, "Failed to seek to position " ZEND_LONG_FMT " in the stream", offset);
php_stream_close(stream);
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