--- a/bin/ix.sh	Mon Apr 19 13:07:58 2021 +0000
+++ b/bin/ix.sh	Mon Apr 19 13:08:16 2021 +0000
@@ -12,6 +12,7 @@
 if [ "$1" = "-d" ]
 then
  d=1
+ rm /tmp/ix_dd_log.txt /tmp/ix_triples.tsv
  shift
 fi
 if [ "$1" = "-w" ]
@@ -44,7 +45,7 @@
     # get triples from index lines
     egrep -ao 'length": "[0-9]*", "offset": "[0-9]*".*\.gz'| \
       sed 's/[a-z]*": "//g;s/", "/\t/g;s/\(crawl-data\|segments\|warc\)\///g' |\
- if [ "$d" ] ; then tee /tmp/ix_triples.tsv ; else cat ; fi
+ if [ "$d" ] ; then tee -a /tmp/ix_triples.tsv ; else cat ; fi
 elif [ "$1" ]
 then
     printf "%s\t%s\t%s\n" "$1" "$2" "$3"
@@ -56,14 +57,14 @@
   if [ -z "$d" ]
   then
       dd if="$f" of=/dev/stdout skip=$o count=$l \
-	  iflag=skip_bytes,count_bytes 2>/dev/null
+	  iflag=skip_bytes,count_bytes status=none
   else
       echo dd if="$f" of=/dev/stdout skip=$o count=$l \
-	  iflag=skip_bytes,count_bytes > /tmp/ix_dd_log.txt
+	  iflag=skip_bytes,count_bytes >> /tmp/ix_dd_log.txt
       dd if="$f" of=/dev/stdout skip=$o count=$l \
 	  iflag=skip_bytes,count_bytes 2>> /tmp/ix_dd_log.txt
   fi | \
-unpigz -dp 1 -c | tee /tmp/data | \
+{ unpigz -dp 1 -c || { printf "dd failure?: %s %s %s\n" $f $o $l 1>&2 ; continue ; } } |\
 { s="w"
 if [ "$p" ]
 then