Re: How to change environment from a module

["Bart Schaefer" <schaefer@brasslantern.com>]

On Dec 22,  3:24pm, Mark Hessling wrote:
}
} So, from within the module I have, I need to be able to do the following:
} 1) Get the current value of an environment variable
} 2) Set the value of an enviornment variable
} 3) Get the value of the current working directory
} 4) Set the value of the current working directory
} 
} I thought I might be able to use bin_cd() and bin_typeset()

In general you shouldn't call bin_ functions directly.  They should almost
always be called only via the command execution code.

} 2) How does one get the values of an environment variable and current
} working directory from within a module ?

Most likely you want these functions:

	createparam(variablename, PM_EXPORTED);
	getsparam(variablename);
	setsparam(variablename, valuestring);

	struct dirsave ds;
	dir = zgetdir(&ds);
	restoredir(&ds);

It's very likely that your module should call zgetdir(&ds) before running
the Rexx program and call restoredir(&ds) after it.  That is, the Rexx
program should not permanently change the shell's current directory.
Within the Rexx program, the usual chdir() system call can be used (but
the values of the PWD and OLDPWD variables cannot be relied upon).  In
this sense the Rexx program would behave as if it is an external command.

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com

Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net