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Diffstat (limited to 'scm/mcron/environment.scm')
| -rw-r--r-- | scm/mcron/environment.scm | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/scm/mcron/environment.scm b/scm/mcron/environment.scm deleted file mode 100644 index 9f694f1..0000000 --- a/scm/mcron/environment.scm +++ /dev/null @@ -1,105 +0,0 @@ -;; Copyright (C) 2003 Dale Mellor -;; -;; This file is part of GNU mcron. -;; -;; GNU mcron is free software: you can redistribute it and/or modify it under -;; the terms of the GNU General Public License as published by the Free -;; Software Foundation, either version 3 of the License, or (at your option) -;; any later version. -;; -;; GNU mcron is distributed in the hope that it will be useful, but WITHOUT -;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or -;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for -;; more details. -;; -;; You should have received a copy of the GNU General Public License along -;; with GNU mcron. If not, see <http://www.gnu.org/licenses/>. - - - -;; This file defines the variable current-environment-mods, and the procedures -;; append-environment-mods (which is available to user configuration files), -;; clear-environment-mods and modify-environment. The idea is that the -;; current-environment-mods is a list of pairs of environment names and values, -;; and represents the cumulated environment settings in a configuration -;; file. When a job definition is seen in a configuration file, the -;; current-environment-mods are copied into the internal job description, and -;; when the job actually runs these environment modifications are applied to -;; the UNIX environment in which the job runs. - - - - -(define-module (mcron environment) - #:export (modify-environment - clear-environment-mods - append-environment-mods - get-current-environment-mods-copy)) - - - - -;; The env-alist is an association list of variable names and values. Variables -;; later in the list will take precedence over variables before. We return a -;; fixed-up version in which some variables are given specific default values -;; (which the user can override), and two variables which the user is not -;; allowed to control are added at the end of the list. - -(define (impose-default-environment env-alist passwd-entry) - (append `(("HOME" . ,(passwd:dir passwd-entry)) - ("CWD" . ,(passwd:dir passwd-entry)) - ("SHELL" . ,(passwd:shell passwd-entry)) - ("TERM" . #f) - ("TERMCAP" . #f)) - env-alist - `(("LOGNAME" . ,(passwd:name passwd-entry)) - ("USER" . ,(passwd:name passwd-entry))))) - - - - -;; Modify the UNIX environment for the current process according to the given -;; association list of variables, with the default variable values imposed. - -(define (modify-environment env-alist passwd-entry) - (for-each (lambda (variable) - (setenv (car variable) (cdr variable))) - (impose-default-environment env-alist passwd-entry))) - - - - -;; As we parse configuration files, we build up an alist of environment -;; variables here. - -(define current-environment-mods '()) - - - -;; Each time a job is added to the system, we take a snapshot of the current -;; set of environment modifiers. - -(define (get-current-environment-mods-copy) - (list-copy current-environment-mods)) - - - -;; When we start to parse a new configuration file, we want to start with a -;; fresh environment (actually an umodified version of the pervading mcron -;; environment). - -(define (clear-environment-mods) - (set! current-environment-mods '())) - - - -;; Procedure to add another environment setting to the alist above. This is -;; used both implicitly by the Vixie parser, and can be used directly by users -;; in scheme configuration files. The return value is purely for the -;; convenience of the parse-vixie-environment in the vixie-specification module -;; (yuk). - -(define (append-environment-mods name value) - (set! current-environment-mods (append current-environment-mods - (list (cons name value)))) - #t) |