1 files changed, 16 insertions, 8 deletions

diff --git a/parasort.sh b/parasort.sh
index 6b54449..6565d61 100644
--- a/parasort.sh
+++ b/parasort.sh
@@ -7,14 +7,22 @@ function ctrl_c() {
     echo "Killed."
 }
 
-cd output || exit 1
-mkdir -p ../sorted
+if ! test -d work; then
+  printf "This directory contains no work/ directory.\n"
+  [ -d ../work ] && printf "(but .. does)\n"
+  exit 1
+fi
 
-for a in *[05];     do echo "$a" >&2; ../merge_entries $a > ../sorted/$a; done &
-for a in *[16];     do echo "      $a" >&2; ../merge_entries $a > ../sorted/$a; done &
-for a in *[27];     do echo "            $a" >&2; ../merge_entries $a > ../sorted/$a; done &
-for a in *[38];     do echo "                  $a" >&2; ../merge_entries $a > ../sorted/$a; done &
-for a in *[49];     do echo "                        $a" >&2; ../merge_entries $a > ../sorted/$a; done &
-for a in brken *_;  do echo "                              $a" >&2; ../merge_entries $a > ../sorted/$a; done &
+export PATH=${PATH}:`pwd -P`/bin/
+
+mkdir -p work/sorted
+cd work/output || exit 1
+
+for a in *[05];     do echo "$a" >&2; merge_entries $a > ../sorted/$a; done &
+for a in *[16];     do echo "      $a" >&2; merge_entries $a > ../sorted/$a; done &
+for a in *[27];     do echo "            $a" >&2; merge_entries $a > ../sorted/$a; done &
+for a in *[38];     do echo "                  $a" >&2; merge_entries $a > ../sorted/$a; done &
+for a in *[49];     do echo "                        $a" >&2; merge_entries $a > ../sorted/$a; done &
+for a in brken *_;  do echo "                              $a" >&2; merge_entries $a > ../sorted/$a; done &
 
 wait