set(1F) UNIX System V(Form and Menu Language Interpreter Utilities) set(1F)
NAME
set, unset - set and unset local or global environment variables
SYNOPSIS
set [ -l variable[=value ] ] . . .
set [ -e variable[=value ] ] . . .
set [ -ffile variable[=value ] ] . . .
unset -l variable . . .
unset -ffile variable . . .
DESCRIPTION
The set command sets variable in the environment, or adds variable=value
to file. If variable is not equated it to a value, set expects the value
to be on standard input. The unset command removes variable. Note that
the FMLI predefined, read-only variables (such as ARG1), may not be set
or unset.
FMLI inherits the UNIX environment when invoked:
-l sets or unsets the specified variable in the local environment.
Variables set with -l will not be inherited by processes invoked
from FMLI.
-e sets the specified variable in the UNIX environment. Variables
set with -e will be inherited by any processes started from FMLI.
Note that these variables cannot be unset.
-ffile sets or unsets the specified variable in the global environment.
The argument file is the name, or pathname, of a file containing
lines of the form variable=value. file will be created if it
does not already exist. Note that no space intervenes between -f
and file.
Note that at least one of the above options must be used for each
variable being set or unset. If you set a variable with the -ffilename
option, you must thereafter include filename in references to that
variable. For example, ${(file)VARIABLE}.
EXAMPLE
Storing a selection made in a menu:
name=Selection 2
action=`set -l SELECTION=2`close
NOTES
Variables set to be available to the UNIX environment (those set using
the -e option) can only be set for the current fmli process and the
processes it calls.
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set(1F) UNIX System V(Form and Menu Language Interpreter Utilities) set(1F)
When using the -f option, unless file is unique to the process, other
users of FMLI on the same machine will be able to expand these variables,
depending on the read/write permissions on file.
A variable set in one frame may be referenced or unset in any other
frame. This includes local variables.
SEE ALSO
env(1), sh(1) in the UNIX System V User's Reference Manual
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