feat(unitproc/bkshuf):Exit early if stdout not being read

diff --git a/unitproc/bkshuf b/unitproc/bkshuf
index d2d0763ebbeea7f9aa40061fe673f1ba372252b2..ff80d8e575b5dee26a3727316fed96a9d9a104f7 100644 (file)
--- a/unitproc/bkshuf
+++ b/unitproc/bkshuf
@@ -1,10 +1,12 @@
 #!/usr/bin/env bash
 # Desc: Mixes input lines while also preserving some neighbors
 # Usage: cat file | bkshuf arg1
 #!/usr/bin/env bash
 # Desc: Mixes input lines while also preserving some neighbors
 # Usage: cat file | bkshuf arg1

-# Version 0.1.2
+# Version 0.2.0

 # Depends: bc 1.07.1, GNU Coreutils 8.32 (shuf)
 # Input: var: arg1  initial lines to output
 
 # Depends: bc 1.07.1, GNU Coreutils 8.32 (shuf)
 # Input: var: arg1  initial lines to output
 

+trap 'exit;' SIGPIPE; # exit early if stdout not being read
+

 # Load env vars
 ## For these numbers of lines of input...
 if [[ ! -v BKSHUF_PARAM_LINEC ]]; then BKSHUF_PARAM_LINEC=1000000; fi;
 # Load env vars
 ## For these numbers of lines of input...
 if [[ ! -v BKSHUF_PARAM_LINEC ]]; then BKSHUF_PARAM_LINEC=1000000; fi;


@@ -88,7 +90,8 @@ consume_line() {
         line="${list_input[$ip]}";
         if [[ -n $line ]]; then
             ##### consume line at index ip
         line="${list_input[$ip]}";
         if [[ -n $line ]]; then
             ##### consume line at index ip

-            printf "%s\n" "$line" & # print to output
+            printf "%s\n" "$line"; # print to output
+

             unset "list_input[$ip]"; # destroy line in list_input array
             ((lc_out++));
             ((lcr--)); # decrement line count remaining lcr
             unset "list_input[$ip]"; # destroy line in list_input array
             ((lc_out++));
             ((lcr--)); # decrement line count remaining lcr