NAME    [Toc]    [Back]

     mkfifo - make a FIFO file

SYNOPSIS    [Toc]    [Back]

     #include <sys/types.h>
     #include <sys/stat.h>

     int
     mkfifo(const char *path, mode_t mode);

DESCRIPTION    [Toc]    [Back]

     mkfifo() creates a new FIFO file with name path.  The access
permissions
     are  specified by mode and restricted by the umask(2) of the
calling process.


     The FIFO's owner ID is set to the process's  effective  user
ID.  The FIFO's
  group  ID  is  set  to that of the parent directory in
which it is created.

RETURN VALUES    [Toc]    [Back]

     A 0 return value indicates success.  A -1 return value indicates an error,
 and an error code is stored in errno.

ERRORS    [Toc]    [Back]

     mkfifo() will fail and no FIFO will be created if:

     [EOPNOTSUPP]   The kernel has not been configured to support
FIFOs.

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

     [ENAMETOOLONG]
                   A  component of a pathname exceeded {NAME_MAX}
characters,
                   or an entire  path  name  exceeded  {PATH_MAX}
characters.

     [ENOENT]      A component of the path prefix does not exist.

     [EACCES]      Search permission is denied for a component of
the path
                   prefix.

     [ELOOP]        Too  many  symbolic links were encountered in
translating the
                   pathname.

     [EROFS]       The named file resides  on  a  read-only  file
system.

     [EEXIST]      The named file exists.

     [ENOSPC]       The  directory in which the entry for the new
FIFO is being
                   placed cannot be extended because there is  no
space left on
                   the file system containing the directory.

     [ENOSPC]      There are no free inodes on the file system on
which the
                   FIFO is being created.

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

     [EDQUOT]       The user's quota of inodes on the file system
on which the
                   FIFO is being created has been exhausted.

     [EIO]         An I/O error occurred while making the  directory entry or
                   allocating the inode.

     [EIO]          An  I/O  error occurred while reading from or
writing to the
                   file system.

     [EFAULT]      path points outside  the  process's  allocated
address space.

SEE ALSO    [Toc]    [Back]

     chmod(2), stat(2), umask(2)

STANDARDS    [Toc]    [Back]

     The  mkfifo  function  call conforms to IEEE Std 1003.1-1988
(``POSIX'').

OpenBSD      3.6                           June      4,      1993