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mkfifo(3)
NAME
  mkfifo - Create a FIFO

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

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

LIBRARY
  Standard C Library (libc)

  System V Compatibility Library (libsys5.a)

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
  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 type, attributes, and access permissions of the file.
      This parameter is constructed by logically ORing values 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 (named pipe).

  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:

  [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.

  [ELOOP]
      Too many links were encountered in translating path.

  [EMFILE]
      No more file descriptors are available for this process.

  [EMFILE]
      The system file table is full, or the device containing the pipes has
      no free inodes.

  [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 S_IFIFO and the
      calling process does not have the DEV_CONFIG system privilege.

  [EROFS]
      The directory in which the file is to be created is located on a read-
      only file system.

SEE ALSO
  Commands: chmod(1), mkdir(1), mkfifo(1)

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

  Standards: standards(5)

  Other: sys_attrs_vfs(5)

Index for Section 3

Alphabetical listing for M

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