projects / projects / rc-scripts.git / blame
| Commit | Line | Data |
|---|---|---|
| 2109dfea | 1 | description "Save random entropy on shutdown and restore it at boot time" |
| c393d0f5 | 2 | |
| 752297a3 JK |
3 | start on pld.sysinit-done |
| 4 | stop on pld.shutdown-started | |
| c393d0f5 JK |
5 | |
| 6 | env SEED_FILE=/var/run/random-seed | |
| 7 | ||
| 8 | pre-start script | |
| 9 | poolfile=/proc/sys/kernel/random/poolsize | |
| 10 | [ -r $poolfile ] && bytes="$(cat $poolfile)" || bytes=512 | |
| 11 | if [ -f $SEED_FILE ]; then | |
| 12 | cat $SEED_FILE >/dev/urandom | |
| 13 | else | |
| 14 | touch $SEED_FILE | |
| 15 | fi | |
| 16 | chmod 600 $SEED_FILE | |
| 17 | dd if=/dev/urandom of=$SEED_FILE count=1 bs=$bytes 2>/dev/null | |
| 18 | end script | |
| 19 | ||
| 20 | post-stop script | |
| 21 | poolfile=/proc/sys/kernel/random/poolsize | |
| 22 | [ -r $poolfile ] && bytes="$(cat $poolfile)" || bytes=512 | |
| 23 | touch $SEED_FILE | |
| 24 | chmod 600 $SEED_FILE | |
| 25 | dd if=/dev/urandom of=$SEED_FILE count=1 bs=$bytes 2>/dev/null | |
| 26 | end script |