userv (pronounced you-serve) is a program which, according to the specification, is
a Unix system facility to allow one program to invoke another when only limited trust exists between them.
It is a tool for system administrators, who often find themselves with a program running as one user which needs to be able to do certain things as another user. For example, my machine's news system needs to scan my users' newsrcs to ensure that the right newsgroups are fetched. Before userv that part of the news system had to run as root, and clumsily use `su'.
It is also a component for application authors. For example, imagine a version of `cron' which didn't need to run as root, so that a security bug in cron would just mean that bad people could get cron jobs to run at the wrong times, rather than everyone on the system being able to break in completely. Imagine being able to do sophisticated mail filtering at delivery time without the mail transfer or delivery agents needing to be root.
userv-discuss please send bug
reports there; otherwise mail them to
userv-discuss. The announcements list is moderated and
will contain only announcements of important bugs, new versions, &c.
The bug reports address mentioned above is also a mailing list; feel
free to subscribe to it.
and subscription web pages, or you can subscribe by sending mail
containing the word `subscribe' to
(use FTP first to find your way around), or via
This program and documentation 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 userv, or one should be available above; if not, see http://www.gnu.org/licenses/.
GNU home page; chiark home page; site or mirror home page
This web page is Copyright (C)1996-2017 Ian Jackson. See the Copyright/acknowledgements.
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