Aucbvax.2677
fa.unix-wizards
utzoo!decvax!ucbvax!unix-wizards
Thu Aug 13 16:17:51 1981
>From ARPAVAX.wnj@Berkeley Thu Aug 13 16:07:10 1981
To: unix-wizards at SRI-UNIX
Subject: Re: Setuid shell files
In-reply-to: Your message of 12 Aug 1981 2356-PDT (Wednesday).
The current 4.1bsd system for VAXes includes a mechanism initially
implemented at Bell Labs (after version 7) which allows a file to
be executable and start with a line:
#! interpreter
where interpreter might be /bin/sh, e.g.
#! /bin/sh
The file is then a ``true executable'', i.e. an exec() succeeds on
it in the obvious way, and the system interprets setuid and setgid
bits on the file.
Bill Joy
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