35 lines
1.2 KiB
Bash
35 lines
1.2 KiB
Bash
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#!/usr/bin/env bash
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# Use bubblewrap to run /bin/sh reusing the host OS binaries (/usr), but with
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# separate /tmp, /home, /var, /run, and /etc. For /etc we just inherit the
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# host's resolv.conf, and set up "stub" passwd/group files. Not sharing
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# /home for example is intentional. If you wanted to, you could design
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# a bwrap-using program that shared individual parts of /home, perhaps
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# public content.
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#
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# Another way to build on this example is to remove --share-net to disable
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# networking.
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set -euo pipefail
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(exec bwrap --ro-bind /usr /usr \
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--dir /tmp \
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--dir /var \
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--symlink ../tmp var/tmp \
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--proc /proc \
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--dev /dev \
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--ro-bind /etc/resolv.conf /etc/resolv.conf \
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--symlink usr/lib /lib \
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--symlink usr/lib64 /lib64 \
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--symlink usr/bin /bin \
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--symlink usr/sbin /sbin \
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--chdir / \
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--unshare-all \
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--share-net \
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--die-with-parent \
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--dir /run/user/$(id -u) \
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--setenv XDG_RUNTIME_DIR "/run/user/`id -u`" \
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--setenv PS1 "bwrap-demo$ " \
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--file 11 /etc/passwd \
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--file 12 /etc/group \
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/bin/sh) \
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11< <(getent passwd $UID 65534) \
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12< <(getent group $(id -g) 65534)
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