ns-tools

Namespace utilities to reuse Open Source packaging efforts.
git clone git://r-36.net/ns-tools
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ns-prepare (1842B)

      1 #!/bin/sh
      2 
      3 doforce=0
      4 doforceonboot=0
      5 [ "$1" = "-f" ] && doforce=1 && shift 1
      6 [ "$1" = "-b" ] && doforceonboot=1 && shift 1
      7 
      8 if [ $# -lt 1 ];
      9 then
     10 	printf "usage: %s [-f] ns\n" "$(basename $0)" >&2
     11 	exit 1
     12 fi
     13 
     14 nsroot="$(ns-root "$1")"
     15 [ $? -gt 0 ] && exit $?
     16 
     17 shift 1
     18 
     19 [ -e "$nsroot/.ns/prepared" \
     20 	-a $doforce -eq 0 \
     21 	-a $doforceonboot -eq 0 ] && exit 0
     22 
     23 if [ $(id -u) -ne 0 ];
     24 then
     25 	printf "ns-prepare needs to be run with root rights.\n" 2>&1
     26 	exit 1
     27 fi
     28 
     29 MOUNTFS=""
     30 UMOUNTFS=""
     31 TOUCHFILES=""
     32 COPYFILES=""
     33 LINKFILES=""
     34 ONBOOT=0
     35 
     36 [ -e "$nsroot/.ns/rc.conf" ] && . "$nsroot/.ns/rc.conf"
     37 [ $ONBOOT -eq 0 -a $doforceonboot -gt 0 ] && exit 0
     38 
     39 if [ ! -d "$nsroot" ];
     40 then
     41 	printf "$nsroot does not seem to be a valid directory.\n" >&2
     42 	exit 1
     43 fi
     44 
     45 if [ ! -d "$nsroot/.ns" ];
     46 then
     47 	mkdir -p "$nsroot/.ns"
     48 	cat > "$nsroot/.ns/rc.conf" <<!__EOF__
     49 MOUNTFS=""
     50 UMOUNTFS=""
     51 TOUCHFILES=""
     52 COPYFILES=""
     53 LINKFILES=""
     54 !__EOF__
     55 fi
     56 
     57 filesystems="$MOUNTFS proc sys tmp dev dev/pts mnt home run devel nix usr/share/terminfo"
     58 for m in $filesystems;
     59 do
     60 	mkdir -p "$nsroot/$m"
     61 	if test -d "/$m"; then
     62 		mountpoint -q "$nsroot/$m" || mount -o rbind "/$m" "$nsroot/$m"
     63 	fi
     64 done
     65 
     66 #[ -d "$nsroot/mnt/root" ] || mkdir -p "$nsroot/mnt/root"
     67 #mountpoint -q "$nsroot/mnt/root" || mount -o rbind / "$nsroot/mnt/root"
     68 
     69 tfs="etc/mtab $TOUCHFILES";
     70 for f in $tfs;
     71 do
     72 	touch "$nsroot/$f"
     73 done
     74 
     75 cfs="bin/nssh bin/capchroot $COPYFILES"
     76 for f in $cfs;
     77 do
     78 	[ -e "/$f" ] && cp -f "/$f" "$nsroot/$f"
     79 done
     80 
     81 lnfs="etc/resolv.conf etc/hostname etc/localtime etc/capchroot.allow etc/hosts etc/locale.gen $LINKFILES"
     82 for f in $lnfs;
     83 do
     84 	[ -e "/$f" ] && ln -f "/$f" "$nsroot/$f"
     85 done
     86 
     87 [ -x /bin/setcap ] && setcap cap_sys_chroot=ep "$nsroot/bin/capchroot"
     88 
     89 touch "$nsroot/.ns/prepared"
     90 [ $ONBOOT -gt 0 ] && touch "$nsroot/.ns/preparedonboot"
     91 printf "$nsroot has been prepared.\n"
     92 
     93 exit 0
     94