set(1fmli)
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}.
Examples
Storing a selection made in a menu:
name=Selection 2
action=`set -l SELECTION=2`close
Notices
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.
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.
When a variable is evaluated that does not
specifically reference a file,
the local environment and UNIX system environment
are searched in that order.
(When a set -l and a set -e is done for the same
variable, the variable evaluates to the value used in the
set -l command.)
References
env(1),
sh(1)
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004