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+# Setup chroot jail for NeXT, NEXTSTEP3.
+# Some remarks to the NEXTSTEP3 jail apply:
+# syslog:
+# Logging with syslog(3) uses a sendto ("/dev/log"). For this to work in
+# the jail, ${POSTFIX_DIR}/dev/log must be a hard link to /dev/log. This
+# fails if /usr/spool/postfix is on another filesystem, and consequently,
+# running chrooted will not be possible, unless you like to run your mail
+# system without logging (not).
+#
+# For this trick to work, the following should be run at every reboot,
+# preferably from /etc/rc, after syslog has been started (and given time
+# to create /dev/log):
+# POSTFIX_DIR=/usr/spool/postfix
+# rm ${POSTFIX_DIR}/dev/log
+# ln /dev/log ${POSTFIX_DIR}/dev/log
+
+set -e
+
+umask 022
+
+POSTFIX_DIR=${POSTFIX_DIR-/usr/spool/postfix}
+
+cd ${POSTFIX_DIR}
+
+# If this fails, running chrooted will be useless.
+mkdir dev
+ln /dev/log dev
+
+mkdir etc etc/zoneinfo
+cp /etc/zoneinfo/localtime etc/zoneinfo
+cp /etc/resolv.conf etc