X-Git-Url: https://git.wh0rd.org/?a=blobdiff_plain;f=.bin%2Fcustom-chroot;h=08d76ada03bfa4aedf7429ab16893cb924858bdd;hb=fb5d2cb632ad05e57c8b257f5a3c85bb75c8ac31;hp=1306cb95928709137da5e234dbfbc08d5f84c878;hpb=9ebe6122e5f7dd378bba60dc7249acecc0847cd7;p=home.git

diff --git a/.bin/custom-chroot b/.bin/custom-chroot
index 1306cb9..08d76ad 100755
--- a/.bin/custom-chroot
+++ b/.bin/custom-chroot
@@ -1,12 +1,18 @@
 #!/bin/bash -e
 
 bootstrap() {
-	[[ -w / ]] || exec sudo env -uUNSHARE HOME="$HOME" "$0" "$@"
+	[[ $(id -u) -eq 0 ]] || exec sudo env -uUNSHARE HOME="$HOME" "$0" "$@"
 
 	if [[ -z ${UNSHARE} ]] ; then
 		mount_args=
 		if type -P unshare >&/dev/null ; then
-			UNSHARE=true exec unshare -m -- "$0" "$@"
+			test_arg() { unshare "$@" -- true >&/dev/null && uargs+=( "$@" ) || :; }
+			uargs=( -m )
+			test_arg -u
+			test_arg -i
+			test_arg -p -f --mount-proc
+			test_arg --propagation=private
+			UNSHARE=true exec unshare "${uargs[@]}" -- "$0" "$@"
 		fi
 	else
 		mount_args='-n'
@@ -14,23 +20,37 @@ bootstrap() {
 	unset UNSHARE
 }
 
+is_mounted() {
+	local dst=$1
+	grep -sq "${dst}" /proc/mounts
+}
+
 maybe_mount() {
 	local src=/$1 dst=${chroot}/${2:-$1}
 	[[ -d ${src} ]] || return 0
 	if ! mkdir -p "${dst}" ; then
 		[[ -w ${chroot} ]] && exit 1 || return 0
 	fi
-	grep -sq "${dst}" /proc/mounts || mount ${mount_args} --bind "${src}" "${dst}"
+	is_mounted "${dst}" || mount ${mount_args} --bind "${src}" "${dst}"
 }
 
 get_type() {
 	case $(file "$1") in
-	*x86-64*)         echo x86_64;;
-	*"Intel 80386"*)  echo i386;;
-	*32-bit*PowerPC*) echo ppc;;
-	*64-bit*PowerPC*) echo ppc64;;
-	*32-bit*S/390*)   echo s390;;
-	*64-bit*S/390*)   echo s390x;;
+	*x86-64*)             echo x86_64;;
+	*"Intel 80386"*)      echo i386;;
+	*32-bit*PowerPC*MSB*) echo ppc;;
+	*64-bit*PowerPC*MSB*) echo ppc64;;
+	*32-bit*PowerPC*LSB*) echo ppcle;;
+	*64-bit*PowerPC*LSB*) echo ppc64le;;
+	*32-bit*S/390*)       echo s390;;
+	*64-bit*S/390*)       echo s390x;;
+	*64-bit*MIPS*)        echo mips64;;
+	*32-bit*MIPS*N32*)    echo mips64;;
+	*32-bit*MIPS*)        echo mips;;
+	*32-bit*PA-RISC*)     echo parisc;;
+	*64-bit*PA-RISC*)     echo parisc64;;
+	*32-bit*SPARC*)       echo sparc;;
+	*64-bit*SPARC*)       echo sparc64;;
 	esac
 }
 
@@ -68,9 +88,11 @@ init_chroot() {
 		fi
 	done
 
-	f="${HOME}/.profile.d/aliases.sh"
-	if [[ -e ${f} ]] ; then
-		cat "${f}" > root/.bash_profile
+	if [[ ! -d root/.git ]] ; then
+		f="${HOME}/.profile.d/aliases.sh"
+		if [[ -e ${f} ]] ; then
+			cat "${f}" > root/.bash_profile
+		fi
 	fi
 }
 
@@ -93,7 +115,12 @@ usage() {
 main() {
 	bootstrap "$@"
 
-	local mounts=( proc sys tmp dev dev/pts usr/portage usr/portage/distfiles usr/local/src )
+	local mounts=(
+		proc sys tmp dev dev/shm run
+		usr/portage usr/portage/distfiles
+		var/db/repos/gentoo var/cache/distfiles
+		usr/local/src
+	)
 
 	local chroot=${0%/*}
 	case ${chroot} in
@@ -107,7 +134,7 @@ main() {
 		-u) cmd='umount' ;;
 		-m) mounts+=( "$2" ); shift ;;
 		-d) chroot=$(realpath "$2"); shift ;;
-		-h) usage ;;
+		--help|-h) usage ;;
 		-*) echo "${0##*/}: unknown option $1"; exit 1 ;;
 		*)  break ;;
 		esac
@@ -121,8 +148,15 @@ main() {
 
 	local m
 	for m in "${mounts[@]}" ; do
-		maybe_mount ${m}
+		maybe_mount "${m}"
 	done
+	# Handle special mounts that we don't want to just bind mount.
+	if ! is_mounted "${chroot}/dev/pts" ; then
+		# Option order matters: on older kernels that don't recognize newinstance,
+		# parsing stops as soon as it hits that.
+		mount -t devpts devpts "${chroot}/dev/pts" \
+			-o nosuid,noexec,mode=0620,gid=5,ptmxmode=0666,newinstance
+	fi
 
 	init_chroot
 
@@ -134,6 +168,8 @@ main() {
 		fi
 	fi
 
+	# Doubtful these settings we want to leak into the chroot.
+	unset ROOT PORTAGE_CONFIGROOT LD_LIBRARY_PATH
 	unset LS_COLORS # format changes over time
 	[[ $# -eq 0 ]] && set -- env HOME=/root /bin/bash -l
 	exec \