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Make backup / restore use POSIX shell for portability.

Browse Source 
backup.sh:
  - Add use getopts for a more friendly user interface.
  - Add timeout to ping check.
  - Add unix epoch to backup file names.
  - Backup ssh information (/etc/ssh, $USER/.ssh).

restore.sh:
  - Add use getopts for a more friendly user interface.
  - Add timeout to ping check.
  - If user doesn't specify a backup file to restore, attempt to
    find the latest for the host name passed in.

Signed-off-by: Aaron Bieber <aaron@bolddaemon.com>
This commit is contained in:
Aaron Bieber
2019-11-11 07:44:52 -07:00
parent a2ac679499
commit 0b2c156d29
2 changed files with 87 additions and 22 deletions
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47
scripts/restore.sh
View File

@ -1,13 +1,50 @@
#!/usr/bin/env bash
#!/bin/sh
usage() {
echo "Usage: restore.sh [-bhnu] [-h] [-b backup name] [-n host name] [-u user name]"
}
while getopts "hb:n:u:" arg; do
case $arg in
b)
BACKUP=$OPTARG
;;
h)
usage
exit
;;
n)
UNIT_HOSTNAME=$OPTARG
;;
u)
USERNAME=$OPTARG
;;
*)
exit 1
esac
done
# name of the ethernet gadget interface on the host
UNIT_HOSTNAME=${1:-10.0.0.2}
UNIT_HOSTNAME=${UNIT_HOSTNAME:-10.0.0.2}
# output backup tgz file
BACKUP=${2:-pwnagotchi-backup.tgz}
if [ -z $BACKUP ]; then
BACKUP=$(ls -rt ${UNIT_HOSTNAME}-backup-*.tgz 2>/dev/null | tail -n1)
if [ -z $BACKUP ]; then
echo "@ Can't find backup file. Please specify one with '-b'"
exit 1
fi
echo "@ Found backup file:"
echo "\t${BACKUP}"
echo -n "@ continue restroring this file? (y/n) "
read CONTINUE
CONTINUE=$(echo "${CONTINUE}" | tr "[:upper:]" "[:lower:]")
if [ "${CONTINUE}" != "y" ]; then
exit 1
fi
fi
# username to use for ssh
USERNAME=${3:-pi}
USERNAME=${USERNAME:-pi}
ping -c 1 "${UNIT_HOSTNAME}" >/dev/null || {
ping -w 3 -c 1 "${UNIT_HOSTNAME}" > /dev/null 2>&1 || {
echo "@ unit ${UNIT_HOSTNAME} can't be reached, make sure it's connected and a static IP assigned to the USB interface."
exit 1
}