parallel: Fixed bug #56981: --tee should try and use --output-error=warn-nopipe

src/parallel

@@ -182,10 +182,17 @@ sub pipe_tee_setup() {
     }
     # cat foo | tee fifo1 fifo2 fifo3 fifo4 fifo5 > /dev/null
     if(not fork()){
+	# Test if tee supports --output-error=warn-nopipe
+	`echo | tee --output-error=warn-nopipe /dev/null >/dev/null 2>/dev/null`;
+	my $opt = $? ? "" : "--output-error=warn-nopipe";
 	# Let tee inherit our stdin
 	# and redirect stdout to null
 	open STDOUT, ">","/dev/null";
-	exec "tee",@fifos;
+	if($opt) {
+	    exec "tee", $opt, @fifos;
+	} else {
+	    exec "tee", @fifos;
+	}
     }
     # For each fifo
     #   (rm fifo1; grep 1) < fifo1

src/parallel.pod

@@ -1659,11 +1659,13 @@ Default: config
 
 =item B<-q>
 
-Quote I<command>. The command must be a simple command (see B<man
-bash>) without redirections and without variable assignments. This
-will quote the command line and arguments so special characters are
-not interpreted by the shell. See the section QUOTING. Most people
-will never need this.  Quoting is disabled by default.
+Quote I<command>. If your command contains special characters that
+should not be interpreted by the shell (e.g. ; \ | *), use B<--quote> to
+escape these. The command must be a simple command (see B<man
+bash>) without redirections and without variable assignments.
+
+See the section QUOTING. Most people will not need this.  Quoting is
+disabled by default.
 
 
 =item B<--no-run-if-empty>

testsuite/tests-to-run/parallel-local-3s.sh

@@ -4,6 +4,33 @@
 # Each should be taking 3-10s and be possible to run in parallel
 # I.e.: No race conditions, no logins
 
+par_tee_with_premature_close() {
+    echo '--tee --pipe should send all data to all commands'
+    echo 'even if a command closes stdin before reading everything'
+    seq 1000000 |
+	parallel -k --tee --pipe \
+		 ::: 'sleep 1' 'sleep 2;wc' 'sleep 2;head' 'sleep 2;tail'
+
+    # tee without --output-error=warn-nopipe support
+    cat > tmp/tee <<-EOF
+	#!/usr/bin/perl
+
+	if(grep /output-error=warn-nopipe/, @ARGV) {
+	    exit(1);
+	}
+	exec "/usr/bin/tee", @ARGV;
+	EOF
+    chmod +x tmp/tee
+    PATH=tmp:$PATH
+    # This gives incomplete output due to:
+    # * tee not supporting --output-error=warn-nopipe
+    # * sleep closes stdin before EOF
+    seq 1000000 |
+	parallel -k --tee --pipe \
+		 ::: 'sleep 1' 'sleep 2;wc' 'sleep 2;head' 'sleep 2;tail'
+    echo
+}
+
 par_maxargs() {
     echo '### Test -n and --max-args: Max number of args per line (only with -X and -m)'
 

testsuite/wanted-results/parallel-local-3s

@@ -1361,6 +1361,50 @@ par_sqlworker_hostname	host
 par_sqlworker_hostname	<hostname>
 par_sqlworker_hostname	<hostname>
 par_sqlworker_hostname	<hostname>
+par_tee_with_premature_close	--tee --pipe should send all data to all commands
+par_tee_with_premature_close	even if a command closes stdin before reading everything
+par_tee_with_premature_close	1000000 1000000 6888896
+par_tee_with_premature_close	1
+par_tee_with_premature_close	2
+par_tee_with_premature_close	3
+par_tee_with_premature_close	4
+par_tee_with_premature_close	5
+par_tee_with_premature_close	6
+par_tee_with_premature_close	7
+par_tee_with_premature_close	8
+par_tee_with_premature_close	9
+par_tee_with_premature_close	10
+par_tee_with_premature_close	999991
+par_tee_with_premature_close	999992
+par_tee_with_premature_close	999993
+par_tee_with_premature_close	999994
+par_tee_with_premature_close	999995
+par_tee_with_premature_close	999996
+par_tee_with_premature_close	999997
+par_tee_with_premature_close	999998
+par_tee_with_premature_close	999999
+par_tee_with_premature_close	1000000
+par_tee_with_premature_close	  12773   12774   65536
+par_tee_with_premature_close	1
+par_tee_with_premature_close	2
+par_tee_with_premature_close	3
+par_tee_with_premature_close	4
+par_tee_with_premature_close	5
+par_tee_with_premature_close	6
+par_tee_with_premature_close	7
+par_tee_with_premature_close	8
+par_tee_with_premature_close	9
+par_tee_with_premature_close	10
+par_tee_with_premature_close	12765
+par_tee_with_premature_close	12766
+par_tee_with_premature_close	12767
+par_tee_with_premature_close	12768
+par_tee_with_premature_close	12769
+par_tee_with_premature_close	12770
+par_tee_with_premature_close	12771
+par_tee_with_premature_close	12772
+par_tee_with_premature_close	12773
+par_tee_with_premature_close	1277
 par_test_X_with_multiple_source	### Test {} multiple times in different commands
 par_test_X_with_multiple_source	echo 1 2 3 4 5 6 7 8 9 10 ; echo 1 2 3 4 5 6 7 8 9 10
 par_test_X_with_multiple_source	1 2 3 4 5 6 7 8 9 10