osf1 man page for mkfifo

mkfifo(3)						     Library Functions Manual							 mkfifo(3)

NAME
       mkfifo - Creates a FIFO

LIBRARY
       Standard C Library (libc.a)
       System V Compatibility Library (libsys5.a)

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

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

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

       mkfifo():  POSIX.1, XPG4, XPG4-UNIX

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

PARAMETERS
       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.  Specifies the type, attributes, and access permissions of the file.  This parameter is constructed by logically ORing  val-
       ues described in the sys/mode.h header file.

	      The mode is then modified by the current file mode creation mask (umask) value.

DESCRIPTION
       The mkfifo function used with libc.a is an interface to the mknod function, where the file that is to be created is a FIFO special file.

       When used with libsys5.a, the mkfifo() function creates a uni-directional STREAMS based file descriptor.

       No special system privileges are required under either implementation.

       Upon  successful  completion,  the mkfifo() function marks the st_atime, st_ctime, and st_mtime fields of the file for update, and sets the
       st_ctime and st_mtime fields of the directory that contains the new entry for update.

RETURN VALUES
       Upon successful completion of mkfifo(), 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	mkfifo()  function fails, the new file is not created and errno may be set to one of the following values: A component of the path
       prefix denies search permission, or write permission is denied on the parent directory of the FIFO to be created.  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.  The named file exists.  Too many links were encountered in translating path.  No more file descriptors are available  for  this
       process.   The  system file table is full, or the device containing the pipes has no free inodes.  The length of the path parameter exceeds
       PATH_MAX or a pathname component is longer than NAME_MAX.  A component of the path prefix does not exist or the path parameter points to an
       empty  string.  The directory that would contain the new file cannot be extended or the file system is out of file allocation resources.  A
       component of the path prefix is not a directory.  The mode parameter specifies a file type other than S_IFIFO and the calling process  does
       not have the DEV_CONFIG system privilege.  The directory in which the file is to be created is located on a read-only file system.

RELATED INFORMATION
       Commands: chmod(1), mkdir(1), mkfifo(1)

       Functions: chmod(2), mkdir(2), mknod(2), open(2), stat(2), umask(2)

       Standards: standards(5)

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																	 mkfifo(3)