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- add usage info

- initialize _ban variable
- style
OK halex@
OPENBSD_5_9
rpe 9 years ago
parent
commit
6ab39bded0
1 changed files with 12 additions and 8 deletions
  1. +12
    -8
      src/etc/rc

+ 12
- 8
src/etc/rc View File

@ -1,4 +1,4 @@
# $OpenBSD: rc,v 1.458 2015/08/22 10:45:59 rpe Exp $
# $OpenBSD: rc,v 1.459 2015/08/22 23:32:18 rpe Exp $
# System startup script run by init on autoboot or after single-user.
# Output and error are redirected to console by init, and the console is the
@ -95,22 +95,26 @@ random_seed() {
# Populate net.inet.(tcp|udp).baddynamic with the contents of /etc/services so
# as to avoid randomly allocating source ports that correspond to well-known
# services.
# Usage: fill_baddynamic tcp|udp
fill_baddynamic() {
local _service=$1
local _sysctl="net.inet.${_service}.baddynamic"
stripcom /etc/services |
{
# Variables are local
_ban=
while IFS=" /" read _name _port _srv _junk; do
[ "x${_srv}" = "x${_service}" ] || continue
_ban="${_ban:+${_ban},}+${_port}"
[[ $_srv == $_service ]] || continue
_ban="${_ban:+$_ban,}+$_port"
# Flush before argv gets too long
if [ ${#_ban} -gt 1024 ]; then
sysctl -q ${_sysctl}=${_ban}
_ban=""
if ((${#_ban} > 1024)); then
sysctl -q "$_sysctl=$_ban"
_ban=
fi
done
[ "${_ban}" ] && sysctl -q ${_sysctl}=${_ban}
[[ -n $_ban ]] && sysctl -q "$_sysctl=$_ban"
}
}


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