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81 lines
1.6 KiB
Bash
81 lines
1.6 KiB
Bash
#!/bin/sh
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#
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# This chroot script uses bad design
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#
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fake_mount() {
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#
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# Fake mount works by removing the dir, and replacing it with a symlink
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# This created the illusion of a bind.
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#
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local FROM="$1";
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local TO="$2"
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if [ -d "$TO" ]; then
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rmdir "$TO";
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fi
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ln -s "$FROM" "$TO";
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}
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fake_umount() {
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#
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# Remove the symlink and recreate the dir
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#
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rm "$1";
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mkdir "$1";
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}
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readonly MASTERDIR="$1"
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readonly DISTDIR="$2"
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readonly HOSTDIR="$3"
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readonly EXTRA_ARGS="$4"
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readonly CMD="$5"
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shift 5
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if [ -z "$MASTERDIR" -o -z "$DISTDIR" ]; then
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echo "$0 MASTERDIR/DISTDIR not set"
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exit 1
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fi
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fake_mount $DISTDIR $MASTERDIR/void-packages;
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if [ ! -z "$HOSTDIR" ]; then
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fake_mount $HOSTDIR $MASTERDIR/host;
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fi
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ITEMS="";
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# xbps-src may send some other binds, parse them here
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while getopts 'b:' c -- "$EXTRA_ARGS"; do
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# Skip everything that's not a bind
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[ "$c" = "b" ] || continue;
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_FROM="$(cut -d: -f1 <<< "$OPTARG")";
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_TO="$(cut -d: -f2 <<< "$OPTARG")";
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fake_mount "${_FROM}" "${_TO}";
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# Save created mounts so we can clean them up later
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ITEMS+="${_TO} "
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done
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CURR_DIR="${PWD}";
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# To give the illusion we entered the chroot, cd to /
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cd /;
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# Tell xbps-src that we are "in the chroot".
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IN_CHROOT=1 $CMD $@;
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# Save exit code for after clean up
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X="$?";
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# cd back to the old pwd, so everything is the same again
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cd "$CURR_DIR";
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if [ ! -z "$HOSTDIR" ]; then
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fake_umount $MASTERDIR/host;
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fi
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fake_umount $MASTERDIR/void-packages;
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# "umount" on demand created "mounts"
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for i in $ITEMS; do
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fake_umount "$i";
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done
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# Exit with the returned exit code
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exit "$X";
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