fixed to fail on unclean gencpio termination

mkinitfs

@@ -1,22 +1,29 @@
 #!/bin/sh -e
 
-out=$1
-shift
+PROG=mkinitfs
 
-[ -n "$out" ] || {
-    echo "Usage: mkinitfs outfile" >&2
+Fatal()
+{
+    echo "$PROG: $*" >&2
     exit 1
 }
 
+TEMP=
+
 exit_handler()
 {
     local rc=$?
     trap - EXIT
-    [ $rc -eq 0 ] || rm -f -- $out
+    [ -z "$TEMP" ] || rm -f -- "$TEMP"
+    [ $rc -eq 0 ] || rm -f -- "$OUT"
     exit $rc
 }
 
+[ -n "$1" ] || Fatal "Usage: mkinitfs outfile"
+OUT="$1"; shift
+
 trap exit_handler HUP PIPE INT TERM QUIT EXIT
+TEMP=`mktemp -t mkinitfs.XXXXXXXXXX` || Fatal "Failed to create temporary file."
 
 (
 
@@ -60,4 +67,6 @@ find /lib/mkinitrd/udev -type f|\
     sed -e 's,/lib/mkinitrd/udev,,' -e 's,^.\+$,file\t&\t/lib/mkinitrd/udev&\t0755\t0 0,g'
 find /etc/modprobe.d/ /etc/udev/rules.d -type f|\
     sed -e 's,^.\+$,file\t&\t&\t0644\t0 0,g'
-) | `pwd`/gencpio - |gzip -c > $out
+) | `pwd`/gencpio - > "$TEMP"
+
+gzip -c < "$TEMP" > "$OUT"