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53 lines
1.8 KiB
Bash
Executable File
53 lines
1.8 KiB
Bash
Executable File
#!/bin/sh
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# Setup the things (mount /proc, /tmp, etc.) that needs to be set up from
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# within the namespace/chroot and then start PID 1.
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#
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# Copyright (c) 2021 Jacques de Laval <jacques@de-laval.se>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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set -eu
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export PATH="$PATH":/usr/bin:/usr/sbin
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# It would have been nice to mount /dev as devtmpfs, but unfortunately
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# that's not possible if you're not privileged. For now tmpfs will
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# have to do.
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mount -n -t tmpfs none /dev
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# Silence BusyBox init
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touch /dev/null
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mount -t proc none /proc
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mount -t sysfs none /sys
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if [ "$(ls -A /tmp)" ]; then
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mkdir -p /tmp.shadow
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mount --bind /tmp /tmp.shadow
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mount -t tmpfs none /tmp
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cp -a /tmp.shadow/* /tmp/
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else
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mount -t tmpfs none /tmp
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fi
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mkdir -p "$FINIT_RCSD"
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tty=/dev/$(cat /sys/class/tty/console/active)
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mkfifo "$tty"
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exec "$@"
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