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safe/evil.scm, safe/README, modules/README, modules/main, modules/module-0.scm, modules/module-1.scm, modules/module-2.scm: Minor cleanup. * README: Added intro stuff, restructured a bit. * box-dynamic/README, box-module/README, box/README: Cleanup and restructuring. * box-dynamic-module/box-mixed.scm: New file, demonstrating usage of extension library functionality, but without exporting procedures from the library. Thanks to Thomas Wawrzinek for the idea and example code! * box-dynamic-module/box-module.scm: Add comments, export make-box, box-ref, box-set!. * box-dynamic-module/README: Integrate new module (box-mixed), restructure and cleanup a bit.
27 lines
864 B
Scheme
27 lines
864 B
Scheme
;;; examples/safe/evil.scm -- Evil Scheme file to be run in a safe
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;;; environment.
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;;; Commentary:
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;;; This is an example file to be evaluated by the `safe' program in
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;;; this directory. This program, unlike the `untrusted.scm' (which
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;;; is untrusted, but a really nice fellow though), tries to do evil
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;;; things and will thus break in a safe environment.
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;;;
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;;; *Note* that the files in this directory are only suitable for
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;;; demonstration purposes, if you have to implement safe evaluation
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;;; mechanisms in important environments, you will have to do more
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;;; than shown here -- for example disabling input/output operations.
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;;; Author: Martin Grabmueller
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;;; Date: 2001-05-30
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;;; Code:
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(define passwd (open-input-file "/etc/passwd"))
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(let lp ((ch (read-char passwd)))
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(if (not (eof-object? ch))
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(lp (read-char passwd))))
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;;; End of file.
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