mkfifo man page on Ultrix

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mkfifo(3)							     mkfifo(3)

Name
       mkfifo - make a FIFO special file

Syntax
       #include <sys/types.h>
       #include <sys/stat.h>
       int mkfifo(path, mode)
       char *path;
       mode_t mode;

Description
       The  function  creates a new FIFO special file whose name is path.  The
       file permission bits of the new FIFO are initialized from  mode,	 where
       the value of mode, is one (or more) of the file permission bits defined
       in <sys/stat.h>.	 The mode argument is modified by the  process's  file
       creation mask (see

       The  FIFO's  owner  ID  is set to the process's effective user ID.  The
       FIFO's group ID is set to the process's effective group ID.

Return Values
       Upon successful completion, a value of 0	 is  returned.	 Otherwise,  a
       value of -1 is returned and errno is set to indicate the error.

Diagnostics
       The function will fail and the FIFO will not be created if:

       [EACCES]	      A component of the path prefix denies search permission.

       [EEXIST]	      The named file exists.

       [ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an
		      entire pathname exceeded 1023 characters.

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

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

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

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

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

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

       [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.

       [ENOSPC]	      There are no free inodes on the file system on which the
		      node 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	direc‐
		      tory has been exhausted.

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

       [ESTALE]	      The file handle given in the argument is	invalid.   The
		      file referred to by that file handle no longer exists or
		      has been revoked.

       [ETIMEDOUT]    A	 connect  request  or  remote  file  operation	failed
		      because  the  connected  party  did not properly respond
		      after a period of time which is dependent on the	commu‐
		      nications protocol.

See Also
       mknod(1), umask(1)

								     mkfifo(3)
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