diff options
Diffstat (limited to 'scripts/uchroot')
| -rwxr-xr-x | scripts/uchroot | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/scripts/uchroot b/scripts/uchroot index b11981a..b94e14f 100755 --- a/scripts/uchroot +++ b/scripts/uchroot @@ -1,7 +1,11 @@ #!/bin/sh set -e [ $# -ge 1 ] || { - echo "Usage: uchroot ROOT [USER] [CMD]" >&2 + echo "Usage: uchroot USER [CMD] [ARG].." >&2 + echo "Configuration has to be passed trough envrionment." + echo " ROOT: path to directory to chroot in" + echo " ARCH: optional target architecture (if qemu should be used)" + echo " MOUNT: pairs of two paths separated by colon (LOCAL:INROOT)" exit 1 } @@ -10,10 +14,17 @@ if [ "$(id -u)" != "0" ]; then fi ############################################################### -ROOT="$1" -USR="${2:-root}" -shift 2 -[ $# -lt 1 ] && CMD="" || CMD="-c '$@'" +[ -n "$ROOT" ] || { + echo "Variable ROOT has to be defined in environment." + exit 1 +} + +USR="${1:-root}" +shift +[ $# -lt 1 ] && CMD="" || { + CMD="-c \"$1\"" + shift +} [ -d "$ROOT" ] || { echo "There is no such directory: $ROOT" >&2 @@ -24,11 +35,23 @@ shift 2 exit 1 } +EXECUTOR= + mount --rbind "$ROOT" "$ROOT" mount -t proc none "$ROOT/proc" mount --rbind /dev "$ROOT/dev" mount --rbind /sys "$ROOT/sys" +while IFS=: read src target; do + [ -n "$src" -a -n "$target" ] || continue + mount --rbind "$src" "$ROOT/$target" +done <<<"$MOUNT" + cp -f /etc/resolv.conf "$ROOT/etc/resolv.conf" cp -f /etc/hosts "$ROOT/etc/hosts" +if [ -n "$ARCH" -a "$ARCH" != "$(arch)" ]; then + cp -f "$(which "qemu-$ARCH")" "$ROOT/qemu" + EXECUTOR=/qemu +fi -exec chroot "$ROOT" /bin/sh -c ". /etc/profile && exec su $CMD -l $USR" "$0" +exec chroot "$ROOT" $EXECUTOR /bin/sh -c \ + ". /etc/profile && exec su -l $USR $CMD \"\$@\"" -- "$@" |