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MKFIFO(3)		   Linux Programmer's Manual		     MKFIFO(3)

NAME
       mkfifo -	make a FIFO special file (a named pipe)

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

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

DESCRIPTION
       mkfifo  makes  a	 FIFO special file with	name pathname.	mode specifies
       the FIFO's permissions. It is modified by the process's	umask  in  the
       usual way: the permissions of the created file are (mode	& ~umask).

       A  FIFO special file is similar to a pipe, except that it is created in
       a different way.	 Instead of being an anonymous communications channel,
       a FIFO special file is entered into the file system by calling mkfifo.

       Once  you have created a	FIFO special file in this way, any process can
       open it for reading or writing, in the same way as  an  ordinary	 file.
       However,	 it  has to be open at both ends simultaneously	before you can
       proceed to do any input or output operations on it.  Opening a FIFO for
       reading	normally  blocks  until	some other process opens the same FIFO
       for writing, and	vice versa. See	fifo(4)	for non-blocking  handling  of
       FIFO special files.

RETURN VALUE
       The  normal,  successful	return value from mkfifo is 0.	In the case of
       an error, -1 is returned	(in which case,	errno is set appropriately).

ERRORS
       EACCES One of the directories in	pathname did not  allow	 search	 (exe-
	      cute) permission.

       EEXIST pathname already exists.

       ENAMETOOLONG
	      Either the total length of pathname is greater than PATH_MAX, or
	      an individual file name component	 has  a	 length	 greater  than
	      NAME_MAX.	 In the	GNU system, there is no	imposed	limit on over-
	      all file name length, but	some file systems may place limits  on
	      the length of a component.

       ENOENT A	 directory  component  in pathname does	not exist or is	a dan-
	      gling symbolic link.

       ENOSPC The directory or filesystem has no room for the new file.

       ENOTDIR
	      A	component used as a directory in pathname is not, in  fact,  a
	      directory.

       EROFS  pathname refers to a read-only filesystem.

CONFORMING TO
       POSIX.1

SEE ALSO
       mkfifo(1),  read(2),  write(2),	open(2),  close(2), stat(2), umask(2),
       fifo(4)

Linux 1.2.13			  1995-09-03			     MKFIFO(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | CONFORMING TO | SEE ALSO

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