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mkfifo(1)
NAME
  mkfifo - Makes FIFO special files

SYNOPSIS
  mkfifo [-m mode] file...

  The mkfifo utility creates FIFO special files in the order specified.

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

  mkfifo:  XCU5.0

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

OPTIONS
  -m mode
      Sets the file permission bits of the new file to the specified mode
      value, after creating the FIFO special file.  The mode argument is a
      symbolic mode string (see chmod), in which the operator characters +
      (plus sign) and - (minus) are interpreted relative to the default file
      mode for that file type.	The + character adds permissions to the
      default mode, and - deletes permissions from the default mode.

      [Tru64 UNIX]  The default mode is a=rw (permissions of rw-rw-rw) as
      modified by the current file mode creation mask (umask).

OPERANDS
  file
      The path name of a FIFO special file to be created.

DESCRIPTION
  For each file argument, mkfifo performs actions equivalent to the mkfifo()
  call with the following arguments:

   1.  The file argument is used as the pathname argument.

   2.  If the -m option is not used, the value of the bitwise inclusive OR of
       S_IRUSR, S_IWUSR, S_IRGRP, S_IWGRP, S_IROTH, and S_IWOTH is used as
       the mode argument.






EXIT STATUS
  The mkfifo utility exits with one of the following values:

  0   Indicates that all the specified FIFO special files were created
      successfully.

  >0  Indicates that an error occurred.

EXAMPLES
   1.  To create a FIFO special file with permissions prw-r--r--, enter:
	    mkfifo -m 644 /tmp/myfifo

       The command creates the /tmp/myfifo file with read/write permissions
       for the owner and read permission for the group and for others.

   2.  To create a FIFO special file using the - (minus) operand to set
       permissions of prw-r-----, enter:
	    mkfifo -m g-w,o-rw /tmp/fifo2

       The command creates the /tmp/fifo2 file, removing write permission for
       the group and all permissions for others.

ENVIRONMENT VARIABLES
  The following environment variables affect the execution of mkfifo:

  LANG
      Provides a default value for the internationalization variables that
      are unset or null. If LANG is unset or null, the corresponding value
      from the default locale is used.	If any of the internationalization
      variables contain an invalid setting, the utility behaves as if none of
      the variables had been defined.

  LC_ALL
      If set to a non-empty string value, overrides the values of all the
      other internationalization variables.

  LC_CTYPE
      Determines the locale for the interpretation of sequences of bytes of
      text data as characters (for example, single-byte as opposed to
      multibyte characters in arguments).

  LC_MESSAGES
      Determines the locale for the format and contents of diagnostic
      messages written to standard error.

  NLSPATH
      Determines the location of message catalogues for the processing of
      LC_MESSAGES.

SEE ALSO
  Commands:  mkdir(1), mknod(8)

  Functions:  chmod(2), mkdir(2), mkfifo(3), mknod(2), umask(2)

  Standards:  standards(5)

Index for Section 1

Alphabetical listing for M

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