skip reading from stdin when it's a tty

vipe: When no output is piped into vipe, and stdin is connected to the
terminal, don't read from stdin before opening the editor. This allows eg:
vipe | command Thanks, Florian Pensec

2 files changed, 12 insertions, 1 deletions

diff --git a/debian/changelog b/debian/changelog
index 8ec91c4..10f84a1 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,12 @@
+moreutils (0.66) UNRELEASED; urgency=medium
+
+  * vipe: When no output is piped into vipe, and stdin is connected to
+    the terminal, don't read from stdin before opening the editor.
+    This allows eg: vipe | command
+    Thanks, Florian Pensec
+
+ -- Joey Hess <id@joeyh.name>  Thu, 04 Feb 2021 16:27:16 -0400
+
 moreutils (0.65) unstable; urgency=medium
 
   * vipe: Added --suffix option.
diff --git a/vipe b/vipe
index 548fbed..9daaec5 100755
--- a/vipe
+++ b/vipe
@@ -64,7 +64,9 @@ $suffix = ".$suffix" if $suffix =~ m/^[^.]/;
 
 my ($fh, $tmp)=tempfile(UNLINK => 1, SUFFIX => $suffix);
 die "cannot create tempfile" unless $fh;
-print ($fh <STDIN>) || die "write temp: $!";
+if (! -t STDIN) {
+	print ($fh <STDIN>) || die "write temp: $!";
+}
 close $fh;
 close STDIN;
 open(STDIN, "</dev/tty") || die "reopen stdin: $!";