2 files changed, 38 insertions, 13 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
diff --git a/postprocess.sh b/postprocess.sh
index 7c4b4e6..9316357 100644
--- a/postprocess.sh
+++ b/postprocess.sh
@@ -2,11 +2,28 @@ export LANG=C
 export LC_ALL=C
 export LC_CTYPE=C
 
-sudo sysctl kern.maxfilesperproc=65563
-sudo sysctl kern.maxfiles=65563
+
+mfpp=`sysctl -n kern.maxfilesperproc`
+mf=`sysctl -n kern.maxfiles`
+
+
+if [ $mfpp -lt 65563 -o $mf -lt 65563 ]; then
+  printf "System resources not tuned, %d and %d please run:\n" $mfpp $mf
+  printf "sudo sysctl kern.maxfilesperproc=65563\n"
+  printf "sudo sysctl kern.maxfiles=65563\n"
+  exit
+fi
+
 ulimit -n 65563
 
-for a in 199[56789]_Q? 20*_Q?; do ./sort_plz $a; done
+export PATH=${PATH}:`pwd -P`/bin/
+
+if ! test -d work; then
+  printf "This directory contains no work/ directory.\n"
+  [ -d ../work ] && printf "(but .. does)\n"
+  exit 1
+fi
 
-rm -rf sorted
-mkdir sorted
+cd work || exit 1
+
+for a in 199[56789]_Q? 20*_Q?; do ./sort_plz $a; done