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47 lines
1.6 KiB
EmacsLisp
47 lines
1.6 KiB
EmacsLisp
;;; setenv.el --- functions to manipulate environment variables.
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;; Maintainer: FSF
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;; Last-Modified: 16 Mar 1992
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;; Keywords: extensions
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;;; Copyright Free Software Foundation 1991
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;;; This file is part of GNU Emacs.
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;;; GNU Emacs is free software; you can redistribute it and/or modify
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;;; it under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 2, or (at your option)
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;;; any later version.
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;;; GNU Emacs is distributed in the hope that it will be useful,
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;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Emacs; see the file COPYING. If not, write to
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;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Code:
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(defun setenv (variable value)
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"Set the value of the environment variable named VARIABLE to VALUE.
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VARIABLE and VALUE should both be strings.
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This function works by modifying process-environment."
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(if (string-match "=" variable)
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(error "name of environment variable contains an '=' character")
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(let ((pattern (concat "^" (regexp-quote (concat variable "="))))
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(scan process-environment))
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(while scan
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(cond
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((string-match pattern (car scan))
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(setcar scan (concat variable "=" value))
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(setq scan nil))
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((null (setq scan (cdr scan)))
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(setq process-environment
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(cons (concat variable "=" value) process-environment))))))))
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(provide 'setenv)
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;;; setenv.el ends here
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