71 lines
1.6 KiB
Bash
71 lines
1.6 KiB
Bash
#!/usr/bin/env bash
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# used to work around cases where stdin is unavailable or not a terminal
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if bash -c ': > /dev/tty' > /dev/null 2>&1; then
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TTY_OR_CONSOLE="/dev/tty"
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else
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TTY_OR_CONSOLE="/dev/console"
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fi
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function yesno {
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unset DISCARD_ME
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while [ -z "$DISCARD_ME" ]; do
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read -p "[y/n] " -n1 DISCARD_ME < $TTY_OR_CONSOLE
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case "$DISCARD_ME" in
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y)
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return 0
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;;
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n)
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return 1
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;;
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*)
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echo " Please enter y for yes or n for no."
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unset DISCARD_ME
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;;
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esac
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done
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}
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# Overlay should still be mounted, right?
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cat /proc/mounts
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read -p "
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press any key" -n1 DISCARD_ME < $TTY_OR_CONSOLE
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# And no services running?
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ps aux | grep -vF "[kworker"
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read -p "
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press any key" -n1 DISCARD_ME < $TTY_OR_CONSOLE
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#TODO: remove above debugging sanity checks
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#TODO: refuse to run if system is running
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#TODO: add a way to tell the system whether to back up before shutting down
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#TODO: colors
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echo "Back up system changes to disk?
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This only affects things outside the /home directory.
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Backing up the system will take some time.
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"
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if yesno; then
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echo "Backing up..."
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#TODO: fiddle with squashfs parameters to find optimal settings
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#TODO: exclude /tmp
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mksquashfs / /run/void-usb/container/new_squashfs.img -b 1M -comp xz -one-file-system -progress -noappend -e /var/cache/xbps
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#TODO: check if enough disk space
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# yes -> create new image next to old image
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# no -> create new image in RAM
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#TODO: figure out when appending to existing squashfs is a good idea
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mv /run/void-usb/container/new_squashfs.img /run/void-usb/container/squashfs.img
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else
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echo ""
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echo "Not backing up."
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fi
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