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mknod(2)
NAME
  mknod - Creates an FIFO or special file

LIBRARY
  Standard C Library (libc.a)

SYNOPSIS
  #include <sys/stat.h>

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

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

  mknod():  POSIX.1, XPG4-UNIX

  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 by logically ORing 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 its 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() 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.

RELATED INFORMATION
  Functions: chmod(2), mkdir(2), open(2), umask(2), stat(2)

  Commands: chmod(1), mkdir(1)

  Standards: standards(5)

Index for Section 2

Alphabetical listing for M

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