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1 | ;;; setenv.el --- functions to manipulate environment variables. |
2 | ||
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3 | ;;; Copyright Free Software Foundation 1991 |
4 | ||
e5167999 | 5 | ;; Maintainer: FSF |
d7b4d18f | 6 | ;; Keywords: extensions |
e5167999 | 7 | |
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8 | ;;; This file is part of GNU Emacs. |
9 | ||
10 | ;;; GNU Emacs is free software; you can redistribute it and/or modify | |
11 | ;;; it under the terms of the GNU General Public License as published by | |
e5167999 | 12 | ;;; the Free Software Foundation; either version 2, or (at your option) |
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13 | ;;; any later version. |
14 | ||
15 | ;;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;;; GNU General Public License for more details. | |
19 | ||
20 | ;;; You should have received a copy of the GNU General Public License | |
21 | ;;; along with GNU Emacs; see the file COPYING. If not, write to | |
22 | ;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
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24 | ;;; Code: |
25 | ||
aa673ecc | 26 | ;;;###autoload |
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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. | |
b6a5978e | 30 | This function works by modifying `process-environment'." |
971571b9 | 31 | (interactive "sSet environment variable: \nsSet %s to value: ") |
6449c898 | 32 | (if (string-match "=" variable) |
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33 | (error "Environment variable name contains `='") |
34 | (let ((pattern (concat "\\`" (regexp-quote (concat variable "=")))) | |
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35 | (scan process-environment)) |
36 | (while scan | |
37 | (cond | |
38 | ((string-match pattern (car scan)) | |
39 | (setcar scan (concat variable "=" value)) | |
40 | (setq scan nil)) | |
41 | ((null (setq scan (cdr scan))) | |
42 | (setq process-environment | |
43 | (cons (concat variable "=" value) process-environment)))))))) | |
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44 | |
45 | (provide 'setenv) | |
46 | ||
c88ab9ce | 47 | ;;; setenv.el ends here |