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Implement privilege dropping

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Add two options, -R/--chroot and -U/--user=user, to chroot to the
config directory (where tinc.conf is located) and to perform
setuid to the user specified, after all the initialization is done.

What's left is handling of pid file since we can't remove it anymore.
This commit is contained in:
Michael Tokarev 2009-05-18 16:25:41 +04:00 • committed by Guus Sliepen
parent 6698f7c390
commit ec316aa32e
3 changed files with 103 additions and 3 deletions
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12
doc/tincd.8.in
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@ -8,7 +8,7 @@
.Nd tinc VPN daemon
.Sh SYNOPSIS
.Nm
.Op Fl cdDkKnL
.Op Fl cdDkKnLRU
.Op Fl -config Ns = Ns Ar DIR
.Op Fl -no-detach
.Op Fl -debug Ns Op = Ns Ar LEVEL
@ -19,6 +19,8 @@
.Op Fl -logfile Ns Op = Ns Ar FILE
.Op Fl -pidfile Ns = Ns Ar FILE
.Op Fl -bypass-security
.Op Fl -chroot
.Op Fl -user Ns = Ns Ar USER
.Op Fl -help
.Op Fl -version
.Sh DESCRIPTION
@ -87,6 +89,14 @@ Under Windows this option will be ignored.
.It Fl -bypass-security
Disables encryption and authentication of the meta protocol.
Only useful for debugging.
.It Fl -chroot
With this option tinc chroots into the directory where network
config is located (@sysconfdir@/tinc/NETNAME if -n option is used,
or to the directory specified with -c option) after initialization.
.It Fl -user Ns = Ns Ar USER
setuid to the specified
.Ar USER
after initialization.
.It Fl -help
Display short list of options.
.It Fl -version