Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (OSF1-V5.1-alpha)
Apropos / Subsearch:
optional field

env(1)								       env(1)


  env, printenv	- Displays or sets the current environment, or displays	the
  values of environment	variables


  Current Syntax

  env [-i] [name=value...] [command] [args...]

  printenv [name]

  Obsolescent Syntax

  env [-] [name=value...] [command] [args...]


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

  env:	XCU5.0

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


  -i  Invokes utility with exactly the environment specified by	the argu-
      ments; the inherited environment is ignored completely.  Changes are in
      effect only while	the specified command is running.

  -   Dash is equivalent to -i option.


      Changes in the form name=value are added to the current environment
      before the command is run.

      [Tru64 UNIX]  Name of an environment variable to be printed.

      Name of a	command	to be invoked with the modified	environment.

      Arguments	to be passed to	command	when it	is executed.


  The env command lets you get and change your current environment, and	then
  run the specified command with the changed environment.  If the -i option
  is used, the current environment is ignored and the command runs with	only
  the changed environment.  Changes are	only in	effect while the specified
  command is running.

  If command is	not specified, env displays your current environment, one
  name=value pair per line.

  [Tru64 UNIX]	The printenv command displays the values of the	variables in
  the environment.  If name is specified, only its value is printed.  If name
  is not the name of a currently set environment variable, only	a blank	line
  is printed, no error is reported.  If	name is	not specified, printenv
  displays the current environment, one	name=value per line.


  If command is	invoked, the exit status of env	is the exit status of com-
  mand;	otherwise, the env utility exits with one of the following values:

  0   The env utility completed	successfully.

      An error occurred	in the env utility.

  126 The command specified by command was found but could not be invoked.

  127 The command specified by command could not be found.


   1.  To add a	shell variable to the environment for the duration of one
       command (sh only), enter:
	    TZ=MST7MDT date
	    env	TZ=MST7MDT date

       Each of these commands displays the current date	and time in Mountain
       Standard	Time.  The two commands	shown are equivalent. When date	is
       finished, the previous value of TZ takes	effect again.

   2.  To replace the environment with another one, enter:
	    env	-i PATH=$PATH IDIR=/u/jim/include LIBDIR=/u/jim/lib make

       This runs make in an environment	that consists only of these defini-
       tions for PATH, IDIR, and LIBDIR.  You must redefine PATH so that the
       shell can find the make command.

       When make is finished, the previous environment takes effect again.

   3.  To find the current setting of the TERM environment variable, enter:
	    printenv TERM

       The command returns the value for the TERM environment variable.


  The following	environment variables affect the execution of env:

      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 mes-
      sages written to standard	error.

      Determines the location of message catalogues for	the processing of


  Commands:  csh(1), ksh(1), Bourne shell sh(1b), POSIX	shell sh(1p)

  Functions:  exec(2)

  Standards:  standards(5)