export(1)                                                         export(1)

NAME
     export - export shell variables

SYNOPSIS
     export [name ...]

DESCRIPTION
     The shell built-in export marks the specified shell variable for
     export. This means that the name of this variable and its value will
     subsequently be known and accessible to all commands.

     If export is invoked without arguments, the names of all shell vari-
     ables that have been exported in the current shell are listed on stan-
     dard output.

     Exported variables are deleted when the shell in which they were
     defined and exported is terminated. Frequently used variables should
     therefore be defined and exported in the $HOME/.profile file.

     Positional parameters and shell functions cannot be exported. Some
     standard variables of the shell are available in all subshells without
     needing to be exported. These include HOME, IFS, PATH, PS1 and PS2. If
     you wish to assign some other value to these variables, and if the
     modified value is to be valid in every subshell, you will need to
     export these variables. Otherwise, the default value is valid in each
     subshell.

     The shell built-in set displays the names and values of all variables
     defined in the current shell, including those that have not been
     exported.

     The env command lists the names and values of all shell variables that
     are passed to each invoked command and each subshell. Variables such
     as IFS, MAILCHECK, PATH, PS1 and PS2 are contained in this output only
     if they have been exported with export.

OPERANDS
     The Korn shell ksh supports additional options, and the values to be
     exported can be assigned a value [see ksh(1)].

     name  Name of the shell variable you want to export. This variable can
           also be assigned a value either before or after the export call.

           You can specify as many shell variables as you like; they must
           be separated from one another by a blank.

           name not specified:

           All shell variables exported in the current shell are written to
           standard output. The output is generated in the following for-
           mat:




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export(1)                                                         export(1)

           export name

           and for the Korn shell ksh:

           name=value

           or, if the -p option is set:

           export name=value

LOCALE
     The LCMESSAGES environment variable governs the language in which
     message texts are displayed. If LCMESSAGES is undefined or is defined
     as the null string, it defaults to the value of LANG. If LANG is like-
     wise undefined or null, the system acts as if it were not internation-
     alized.

EXAMPLES
     The shell script editor is to display the value of the EDITOR vari-
     able. The script file contains the following:

     : Invocation with sh editor
     echo EDITOR: $EDITOR

     The following interactive session demonstrates why the shell variable
     EDITOR has to be exported:

     $ export
     export HOME
     export PATH
     export PS1
     $ EDITOR=vi
     $ sh editor
     EDITOR:
     $ export EDITOR
     $ export
     export HOME
     export PATH
     export PS1
     export EDITOR
     $ sh editor
     EDITOR: vi

     When you define a shell variable, it is only known in the current
     shell. Since a shell script is always run by a subshell, variables for
     shell scripts have to be exported.

NOTES
     Some differences in behavior may occur when using export, depending on
     which shell is being used. The possible differences are not described
     specifically.



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export(1)                                                         export(1)

SEE ALSO
     env(1), ksh(1), set(1), sh(1).




















































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