mkfifo man page on DigitalUNIX

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mkfifo(1)							     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 stan‐
       dards as follows:

       mkfifo:	XCU5.0

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

OPTIONS
       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
       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: The file argument  is  used
       as  the	pathname argument.  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: Indicates
       that all the specified FIFO special files  were	created	 successfully.
       Indicates that an error occurred.

EXAMPLES
       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 permis‐
	      sions  for  the  owner and read permission for the group and for
	      others.  To create a FIFO special file using the - (minus) oper‐
	      and  to set permissions of prw-r-----, enter: mkfifo -m g-w,o-rw
	      /tmp/fifo2

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

ENVIRONMENT VARIABLES
       The  following  environment  variables  affect the execution of mkfifo:
       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.	If set to a  non-empty	string	value,
       overrides  the  values of all the other internationalization variables.
       Determines the locale for the interpretation of sequences of  bytes  of
       text  data as characters (for example, single-byte as opposed to multi‐
       byte characters in arguments).  Determines the locale  for  the	format
       and  contents of diagnostic messages written to standard error.	Deter‐
       mines the location of message catalogues for the processing of  LC_MES‐
       SAGES.

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

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

       Standards:  standards(5)

								     mkfifo(1)
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