1 ;;; setenv.el --- functions to manipulate environment variables.
4 ;; Last-Modified: 16 Mar 1992
5 ;; Keywords: extensions
7 ;;; Copyright Free Software Foundation 1991
9 ;;; This file is part of GNU Emacs.
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13 ;;; the Free Software Foundation; either version 2, or (at your option)
14 ;;; any later version.
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19 ;;; GNU General Public License for more details.
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23 ;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 (defun setenv (variable value
)
28 "Set the value of the environment variable named VARIABLE to VALUE.
29 VARIABLE and VALUE should both be strings.
30 This function works by modifying process-environment."
31 (if (string-match "=" variable
)
32 (error "name of environment variable contains an '=' character")
33 (let ((pattern (concat "^" (regexp-quote (concat variable
"="))))
34 (scan process-environment
))
37 ((string-match pattern
(car scan
))
38 (setcar scan
(concat variable
"=" value
))
40 ((null (setq scan
(cdr scan
)))
41 (setq process-environment
42 (cons (concat variable
"=" value
) process-environment
))))))))
46 ;;; setenv.el ends here