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mknod(2)
NAME
  mknod - Create a FIFO or special file

SYNOPSIS
  #include <sys/stat.h>

  int mknod(
	  const char *path,
	  mode_t mode,
	  dev_t device );

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  mknod(): POSIX.1, XSH4.2, XSH5.0

  Refer to the standards(5) reference page for more information about
  industry standards and associated tags.

  Standards: standards(5)

PARAMETERS
  path
      Names the new file.  If the final component of the path parameter names
      a symbolic link, the link will be traversed and pathname resolution
      will continue.

  mode
      Specifies the file type, attributes, and access permissions. This
      parameter is constructed with a logical OR operation on values
      described in the <sys/mode.h> header file.

  device
      Depends upon the configuration and is used only if the mode parameter
      specifies a block or character special file. If the file you specify is
      a remote file, the value of the device parameter must be meaningful on
      the node where the file resides.

DESCRIPTION
  The mknod() function creates a special file or FIFO.	Using the mknod()
  function to create file types other than FIFO special requires superuser
  privilege.

  For the mknod() function to complete successfully, a process must have
  search permission and write permission in the parent directory of the path
  parameter.

  The new file has the following characteristics:

    ·  File type as specified by the mode parameter

    ·  Owner ID set to the process effective user ID

    ·  Group ID set to the group ID of the file's parent directory

    ·  Permission and attribute bits set according to the value of the mode
       parameter

       All bits set in the process file mode creation mask are cleared. See
       the umask(2) function.

RETURN VALUES
  Upon successful completion of the mknod() function a value of 0 (zero) is
  returned. Otherwise, a value of -1 is returned and errno is set to indicate
  the error.

ERRORS
  If the mknod() function fails, the new file is not created and errno may be
  set to one of the following values:

  [EACCES]
      A component of the path prefix denies search permission, or write
      permission is denied on the parent directory of the FIFO to be created.

  [EDQUOT]
      The directory in which the entry for the new link is being placed
      cannot be extended because the user's quota of disk blocks or inodes on
      the file system is exhausted.

  [EEXIST]
      The named file exists.

  [EIO]
      While accessing the file system, an I/O error occurred.

  [EINVAL]
      An invalid argument has been specified.

  [ENAMETOOLONG]
      The length of the path parameter exceeds PATH_MAX or a pathname
      component is longer than NAME_MAX.

  [ENOENT]
      A component of the path prefix does not exist or the path parameter
      points to an empty string.

  [ENOSPC]
      The directory that would contain the new file cannot be extended or the
      file system is out of file allocation resources.

  [ENOTDIR]
      A component of the path prefix is not a directory.

  [EPERM]
      The mode parameter specifies a file type other than FIFO and the
      calling process does not have the sufficient privilege.

  [EROFS]
      The directory in which the file is to be created is located on a read-
      only file system.

SEE ALSO
  Functions: chmod(2), mkdir(2), open(2), umask(2), stat(2)

  Commands: chmod(1), mkdir(1)

  Others: standards(5)

Index for Section 2

Alphabetical listing for M

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