diff -u -r mm2.7.org/src/bin/showaudio mm2.7/src/bin/showaudio
--- bin/showaudio	Wed Feb  2 16:21:26 1994
+++ bin/showaudio	Wed May 21 21:34:08 1997
@@ -15,9 +15,35 @@
 # WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.
 #
 
-
+# Set a sensible value for the temporary directory, if its not
+# already set.  If TMPDIR is set previously, then we will
+# assume it is adequately protected.
 if (! $?METAMAIL_TMPDIR) then
-    set METAMAIL_TMPDIR=/tmp
+    if ($?TMPDIR) then
+        set METAMAIL_TMPDIR="$TMPDIR"
+    else
+        set METAMAIL_TMPDIR=~/metamail_tmp
+    endif
+endif
+
+# Set a sensible umask value
+umask 077
+
+# Make sure that the temporary directory is available
+if (! -d "$METAMAIL_TMPDIR") then
+
+    if (! -e "$METAMAIL_TMPDIR") then
+        mkdir "$METAMAIL_TMPDIR"
+    else
+        echo "$METAMAIL_TMPDIR exists, but is not a directory"
+        exit 2
+    endif
+
+    if ( $status != 0 || ! -d "$METAMAIL_TMPDIR" ) then
+        echo "Error creating $METAMAIL_TMPDIR"
+        exit 2
+    endif
+
 endif
 
 # First, figure out which machine to play it on!
@@ -33,7 +59,7 @@
 set ORG="Bellcore"
 set STDINPUT=0
 if ("$1" == "-p") then
-    set AUDIOPHONE=$2
+    set AUDIOPHONE="$2"
     shift
     shift
 endif
@@ -173,7 +199,7 @@
 	    set AUDIOPHONE=$<
 	endif
 	if ($thishost == $AUDIOPHONEHOST || $thishost == $AUDIOPHONEHOSTLONG) then
-	    echo Calling Phone number $AUDIOPHONE
+	    echo Calling Phone number "$AUDIOPHONE"
 	    echo "You MUST SAY HELLO when you answer the phone, or you will not hear the message."
 	    mail -s "showaudio: `whoami` called $AUDIOPHONE" $AUDIOLOGMAIL < /dev/null
 	    if ($STDINPUT) then
@@ -206,7 +232,7 @@
     echo -n "File name:"
     set fname=$<
 endif
-cp $1 $fname
+cp "$1" $fname
 if ($status == 0) echo Wrote raw audio file: $fname
 exit 0
 
Only in mm2.7/src/bin: showaudio~
diff -u -r mm2.7.org/src/bin/showexternal mm2.7/src/bin/showexternal
--- bin/showexternal	Tue Feb  8 09:39:05 1994
+++ bin/showexternal	Wed May 21 21:41:39 1997
@@ -15,9 +15,45 @@
 # WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.
 # 
 
+# Check argument integrity. Don't trust mail headers
+switch ("$1$2$3$4$5$6$7")
+case "*[\t ]*":
+  echo "Illegal white space in arguments\!"
+  echo "Command was:"
+  echo "'$0' '$1' '$2' '$3' '$4' '$5' '$6' '$7'"
+  exit 2
+endsw
+
 onintr cleanup
+# Set a sensible value for the temporary directory, if its not
+# already set.  If TMPDIR is set previously, then we will
+# assume it is adequately protected.
 if (! $?METAMAIL_TMPDIR) then
-    set METAMAIL_TMPDIR=/tmp
+    if ($?TMPDIR) then
+        set METAMAIL_TMPDIR="$TMPDIR"
+    else
+        set METAMAIL_TMPDIR=~/metamail_tmp
+    endif
+endif
+
+# Set a sensible umask value
+umask 077
+
+# Make sure that the temporary directory is available
+if (! -d "$METAMAIL_TMPDIR") then
+
+    if (! -e "$METAMAIL_TMPDIR") then
+        mkdir "$METAMAIL_TMPDIR"
+    else
+        echo "$METAMAIL_TMPDIR exists, but is not a directory"
+        exit 2
+    endif
+
+    if ( $status != 0 || ! -d "$METAMAIL_TMPDIR" ) then
+        echo "Error creating $METAMAIL_TMPDIR"
+        exit 2
+    endif
+
 endif
 if (! $?FTP) then
     set FTP=ftp
Only in mm2.7/src/bin: showexternal~
diff -u -r mm2.7.org/src/bin/showpartial mm2.7/src/bin/showpartial
--- bin/showpartial	Wed Feb  2 16:21:29 1994
+++ bin/showpartial	Wed May 21 21:39:49 1997
@@ -2,8 +2,44 @@
 # (The "-fb" might need to be changed to "-f" on some systems)
 #
 
+# Check argument integrity. Don't trust mail headers
+switch ("$1$2$3$4")
+case "*[\t ]*":
+  echo "Illegal white space in arguments\!"
+  echo "Command was:"
+  echo "'$0' '$1' '$2' '$3' '$4'"
+  exit 2
+endsw
+
+# Set a sensible value for the temporary directory, if its not
+# already set.  If TMPDIR is set previously, then we will
+# assume it is adequately protected.
 if (! $?METAMAIL_TMPDIR) then
-    set METAMAIL_TMPDIR=/tmp
+    if ($?TMPDIR) then
+        set METAMAIL_TMPDIR="$TMPDIR"
+    else
+        set METAMAIL_TMPDIR=~/metamail_tmp
+    endif
+endif
+
+# Set a sensible umask value
+umask 077
+
+# Make sure that the temporary directory is available
+if (! -d "$METAMAIL_TMPDIR") then
+
+    if (! -e "$METAMAIL_TMPDIR") then
+        mkdir "$METAMAIL_TMPDIR"
+    else
+        echo "$METAMAIL_TMPDIR exists, but is not a directory"
+        exit 2
+    endif
+
+    if ( $status != 0 || ! -d "$METAMAIL_TMPDIR" ) then
+        echo "Error creating $METAMAIL_TMPDIR"
+        exit 2
+    endif
+
 endif
 
 set TREEROOT=${METAMAIL_TMPDIR}/m-prts-`whoami`
@@ -11,14 +47,14 @@
     echo "Usage:  showpartial file id partnum totalnum"
     exit -1
 endif
-set file=$1
+set file="$1"
 # This next line is because message-id can contain weird chars
-set id=`echo $2 | tr -d  \!\$\&\*\(\)\|\'\"\;\/\<\>\\` 
-@ partnum = $3
-if ($#argv == 3 || $4 == "") then
+set id=`echo "$2" | tr -d  \!\$\&\*\(\)\|\'\"\;\/\<\>\\` 
+@ partnum = "$3"
+if ($#argv == 3 || "$4" == "") then
     set totalnum=-1
 else
-    @ totalnum = $4
+    @ totalnum = "$4"
 endif
 
 if (! -d  $TREEROOT)  then
@@ -35,9 +71,9 @@
         exit -1
     endif
 endif
-cp $file ${TREEROOT}/$id/$partnum
+cp "$file" ${TREEROOT}/$id/$partnum
 if ($status) then 
-    echo cp $file ${TREEROOT}/$id/$partnum failed
+    echo cp "$file" ${TREEROOT}/$id/$partnum failed
     exit -1
 endif
 if ($totalnum == -1) then
Only in mm2.7/src/bin: showpartial~
diff -u -r mm2.7.org/src/bin/showpicture mm2.7/src/bin/showpicture
--- bin/showpicture	Mon Feb  7 10:59:54 1994
+++ bin/showpicture	Wed May 21 21:34:59 1997
@@ -15,15 +15,42 @@
 # WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.
 #
 
+# Set a sensible value for the temporary directory, if its not
+# already set.  If TMPDIR is set previously, then we will
+# assume it is adequately protected.
 if (! $?METAMAIL_TMPDIR) then
-    set METAMAIL_TMPDIR=/tmp
+    if ($?TMPDIR) then
+        set METAMAIL_TMPDIR="$TMPDIR"
+    else
+        set METAMAIL_TMPDIR=~/metamail_tmp
+    endif
+endif
+
+# Set a sensible umask value
+umask 077
+
+# Make sure that the temporary directory is available
+if (! -d "$METAMAIL_TMPDIR") then
+
+    if (! -e "$METAMAIL_TMPDIR") then
+        mkdir "$METAMAIL_TMPDIR"
+    else
+        echo "$METAMAIL_TMPDIR exists, but is not a directory"
+        exit 2
+    endif
+
+    if ( $status != 0 || ! -d "$METAMAIL_TMPDIR" ) then
+        echo "Error creating $METAMAIL_TMPDIR"
+        exit 2
+    endif
+
 endif
 
 if (! $?X_VIEWER) then
-set X_VIEWER="xloadimage -view -quiet -geometry +1+1"
+  set X_VIEWER="xloadimage -view -quiet -geometry +1+1"
 # set X_VIEWER="xv -geometry +1+1"
 endif
-if ($1 == "-viewer" && $#argv > 1) then
+if ("$1" == "-viewer" && $#argv > 1) then
     set X_VIEWER = "$2"
     shift
     shift
@@ -57,7 +84,7 @@
             endif
         end
     endif
-    cp $1 $fname
+    cp "$1" $fname
     if ($status == 0) echo Wrote file $fname
     exit 0
 endif