Tools: unitc quiet mode fix for macOS.

lcrilly · lcrilly · commit 9ad207057c62 · 2023-10-03T14:57:17.000+01:00
head -c 0 does not work on macOS (invalid byte count) but tail(1) is happy
to accept zero bytes, and does not have a performance penalty.
diff --git a/tools/unitc b/tools/unitc
@@ -186,7 +186,7 @@ fi
 # Choose presentation style
 #
 if [ $QUIET -eq 1 ]; then
-	OUTPUT="head -c 0" # Equivalent to >/dev/null
+	OUTPUT="tail -c 0" # Equivalent to >/dev/null
 elif hash jq 2> /dev/null; then
 	OUTPUT="jq"
 else

Original file line number	Diff line number	Diff line change
`@@ -186,7 +186,7 @@ fi`
`186`	`186`	`# Choose presentation style`
`187`	`187`	`#`
`188`	`188`	`if [ $QUIET -eq 1 ]; then`
`189`		`- OUTPUT="head -c 0" # Equivalent to >/dev/null`
	`189`	`+ OUTPUT="tail -c 0" # Equivalent to >/dev/null`
`190`	`190`	`elif hash jq 2> /dev/null; then`
`191`	`191`	`OUTPUT="jq"`
`192`	`192`	`else`