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2026-04-23 17:07:55 +08:00
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.TH SAFE_FINGER 8 "21th June 1997" Linux "Linux Programmer's Manual"
.SH NAME
safe_finger \- finger client wrapper that protects against nasty stuff
from finger servers
.SH SYNOPSIS
.B safe_finger [finger_options]
.SH DESCRIPTION
The
.B safe_finger
command protects against nasty stuff from finger servers. Use this
program for automatic reverse finger probes from the
.B tcp_wrapper
.B (tcpd)
, not the raw finger command. The
.B safe_finger
command makes sure that the finger client is not run with root
privileges. It also runs the finger client with a defined PATH
environment.
.B safe_finger
will also protect you from problems caused by the output of some
finger servers. The problem: some programs may react to stuff in
the first column. Other programs may get upset by thrash anywhere
on a line. File systems may fill up as the finger server keeps
sending data. Text editors may bomb out on extremely long lines.
The finger server may take forever because it is somehow wedged.
.B safe_finger
takes care of all this badness.
.SH SEE ALSO
.BR hosts_access (5),
.BR hosts_options (5),
.BR tcpd (8)
.SH AUTHOR
Wietse Venema, Eindhoven University of Technology, The Netherlands.