nc is *hobbit*'s netcat; let the sysadm have the same tools the crackers

have, so that he may learn what the network is about and protect it better.

1 files changed, 46 insertions, 0 deletions

diff --git a/src/usr.bin/nc/scripts/ncp b/src/usr.bin/nc/scripts/ncp
new file mode 100644
index 0000000000..1931b03385
--- /dev/null
+++ b/src/usr.bin/nc/scripts/ncp
@@ -0,0 +1,46 @@
+#! /bin/sh
+## Like "rcp" but uses netcat on a high port.
+## do "ncp targetfile" on the RECEIVING machine
+## then do "ncp sourcefile receivinghost" on the SENDING machine
+## if invoked as "nzp" instead, compresses transit data.
+
+## pick your own personal favorite port, which will be used on both ends.
+## You should probably change this for your own uses.
+MYPORT=23456
+
+## if "nc" isn't systemwide or in your PATH, add the right place
+# PATH=${HOME}:${PATH} ; export PATH
+
+test "$3" && echo "too many args" && exit 1
+test ! "$1" && echo "no args?" && exit 1
+me=`echo $0 | sed 's+.*/++'`
+test "$me" = "nzp" && echo '[compressed mode]'
+
+# if second arg, it's a host to send an [extant] file to.
+if test "$2" ; then
+  test ! -f "$1" && echo "can't find $1" && exit 1
+  if test "$me" = "nzp" ; then
+    compress -c < "$1" | nc -v -w 2 $2 $MYPORT && exit 0
+  else
+    nc -v -w 2 $2 $MYPORT < "$1" && exit 0
+  fi
+  echo "transfer FAILED!"
+  exit 1
+fi
+
+# fall here for receiver.  Ask before trashing existing files
+if test -f "$1" ; then
+  echo -n "Overwrite $1? "
+  read aa
+  test ! "$aa" = "y" && echo "[punted!]" && exit 1
+fi
+# 30 seconds oughta be pleeeeenty of time, but change if you want.
+if test "$me" = "nzp" ; then
+  nc -v -w 30 -p $MYPORT -l < /dev/null | uncompress -c > "$1" && exit 0
+else
+  nc -v -w 30 -p $MYPORT -l < /dev/null > "$1" && exit 0
+fi
+echo "transfer FAILED!"
+# clean up, since even if the transfer failed, $1 is already trashed
+rm -f "$1"
+exit 1