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# eio_mknod

(PECL eio >= 0.0.1dev)

eio_mknod — Create a special or ordinary file.

### Description

resource eio_mknod ( string `$path` , int `$mode` , int `$dev` [, int `$pri` = EIO_PRI_DEFAULT [, callable `$callback` = NULL [, mixed `$data` = NULL ]]] )

eio_mknod() creates ordinary or special(often) file.

Warning

This function is currently not documented; only its argument list is available.

### Parameters

`path`

  Path for the new node(file).

`mode`

  Specifies both the permissions to use and the type of node to be created. It should be a combination (using bitwise OR) of one of the file types listed below and the permissions for the new node(e.g. 0640). Possible file types are: `EIO_S_IFREG`(regular file), `EIO_S_IFCHR`(character file), `EIO_S_IFBLK`(block special file), `EIO_S_IFIFO`(FIFO - named pipe) and `EIO_S_IFSOCK`(UNIX domain socket). To specify permissions EIO_S_I* constants could be used.

`dev`

  If the file type is `EIO_S_IFCHR` or `EIO_S_IFBLK` then dev specifies the major and minor numbers of the newly created device special file. Otherwise `dev` ignored. See mknod(2) man page for details.

`pri`

  The request priority: `EIO_PRI_DEFAULT`, `EIO_PRI_MIN`, `EIO_PRI_MAX`, or `NULL`. If `NULL` passed, `pri` internally is set to `EIO_PRI_DEFAULT`.

`callback`

  `callback` function is called when the request is done. It should match the following prototype:

  `void callback(mixed $data, int $result[, resource $req]);`
  `data`

    is custom data passed to the request.

  `result`

    request-specific result value; basically, the value returned by corresponding system call.

  `req`

    is optional request resource which can be used with functions like eio_get_last_error()

`data`

  Arbitrary variable passed to `callback`.

### Return Values

eio_mknod() returns request resource on success or `FALSE` on error.

### Examples

Example #1 eio_mknod() example

`<?php
// FIFO name
$temp_filename = "/tmp/eio-temp-fifo";
/* Is called when eio_mknod() finishes */
function my_mknod_callback($data, $result) {
$s = stat($data);
var_dump($s);
if ($result == 0) {
echo "eio_mknod_ok";
}
@unlink($data);
}
eio_mknod($temp_filename, EIO_S_IFIFO, 0,
EIO_PRI_DEFAULT, "my_mknod_callback", $temp_filename);
eio_event_loop();
?>`

The above example will output something similar to:

    array(26) {
      [0]=>
      int(17)
      [1]=>
      int(2337608)
      [2]=>
      int(4096)
      [3]=>
      int(1)
      [4]=>
      int(1000)
      [5]=>
      int(100)
      [6]=>
      int(0)
      [7]=>
      int(0)
      [8]=>
      int(1318241261)
      [9]=>
      int(1318241261)
      [10]=>
      int(1318241261)
      [11]=>
      int(4096)
      [12]=>
      int(0)
      ["dev"]=>
      int(17)
      ["ino"]=>
      int(2337608)
      ["mode"]=>
      int(4096)
      ["nlink"]=>
      int(1)
      ["uid"]=>
      int(1000)
      ["gid"]=>
      int(100)
      ["rdev"]=>
      int(0)
      ["size"]=>
      int(0)
      ["atime"]=>
      int(1318241261)
      ["mtime"]=>
      int(1318241261)
      ["ctime"]=>
      int(1318241261)
      ["blksize"]=>
      int(4096)
      ["blocks"]=>
      int(0)
    }
    eio_mknod_ok

### See Also

- eio_open

eio_mkdir
eio_nop
Eio Functions
PHP Manual