~mdw / firewall / blame
| Commit | Line | Data |
|---|---|---|
| 775bd287 | 1 | ### -*-sh-*- |
| bfdc045d MW |
2 | ### |
| 3 | ### Failsafe prologue for firewall scripts | |
| 4 | ### | |
| 5 | ### (c) 2008 Mark Wooding | |
| 6 | ### | |
| 7 | ||
| 8 | ###----- Licensing notice --------------------------------------------------- | |
| 9 | ### | |
| 10 | ### This program is free software; you can redistribute it and/or modify | |
| 11 | ### it under the terms of the GNU General Public License as published by | |
| 12 | ### the Free Software Foundation; either version 2 of the License, or | |
| 13 | ### (at your option) any later version. | |
| 14 | ### | |
| 15 | ### This program is distributed in the hope that it will be useful, | |
| 16 | ### but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 18 | ### GNU General Public License for more details. | |
| 19 | ### | |
| 20 | ### You should have received a copy of the GNU General Public License | |
| 21 | ### along with this program; if not, write to the Free Software Foundation, | |
| 22 | ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 23 | ||
| 24 | m4_divert(10)m4_dnl | |
| 25 | ###-------------------------------------------------------------------------- | |
| 26 | ### Failsafe prologue. | |
| 27 | ||
| 28 | revert () { | |
| 29 | echo "$1! Retreating to safe version..." | |
| 30 | if ! "$firewall_failsafe" revert; then | |
| 31 | echo >&2 "Safe firewall failed. You're screwed. Good luck." | |
| 32 | exit 1 | |
| 33 | fi | |
| 34 | echo >&2 "Phew! Fallback to safe version successful." | |
| 35 | exit 1 | |
| 36 | } | |
| 37 | ||
| 38 | finished () { | |
| 39 | echo "Done." | |
| 40 | exit 0 | |
| 41 | } | |
| 42 | ||
| 43 | exit_after_clearing=: | |
| 44 | export FWCOOKIE=magical | |
| 45 | case "${1-update}" in | |
| 46 | start | restart | reload | force-reload) | |
| 47 | echo -n "Starting up firewall... " | |
| 48 | "$firewall_script" install || revert "Failed" | |
| 49 | finished | |
| 50 | ;; | |
| 51 | stop) | |
| 52 | echo -n "Shutting down firewall... " | |
| 53 | exit_after_clearing=finished | |
| 54 | ;; | |
| 55 | update) | |
| 56 | echo -n "Installing new firewall... " | |
| 57 | "$firewall_script" install || revert "Failed" | |
| 58 | echo "Done." | |
| 59 | echo "Can you hear me?" | |
| 60 | parent=$$ | |
| 61 | (sleep 5; kill $parent; revert "Timeout")& | |
| 62 | child=$! | |
| 63 | read answer | |
| 64 | kill $child | |
| 65 | case "$answer" in | |
| 66 | y* | Y*) | |
| 67 | echo "Cool. We're done here." | |
| 68 | exit 0 | |
| 69 | ;; | |
| 70 | esac | |
| 71 | revert "Bogus" | |
| 72 | ;; | |
| 73 | install | revert) | |
| 74 | ;; | |
| 75 | *) | |
| 76 | echo >&2 "Usage: firewall start|stop|reload|restart|force-reload|update|install|revert" | |
| 77 | exit 1 | |
| 78 | ;; | |
| 79 | esac | |
| 80 | ||
| 81 | m4_divert(-1) | |
| 82 | ###----- That's all, folks -------------------------------------------------- |