Subject: [PATCH 1/1] Fix printing last progress report line in client programs.

From: Heikki Linnakangas <[email-masked]>
Date: Wed, 12 Aug 2020 23:27:01 +0300

A number of client programs have a "--progress" option that when printing
to a TTY, updates the current line by printing a '\r' and overwriting it.
After the last line, an extra '\n' needs to be printed to move the cursor
to the next line. pg_basebackup and pgbench got this right, but pg_rewind
and pg_checksums were slightly wrong. pg_rewind printed the newline to
stdout instead of stderr, and pg_checksum printed the newline even when
not printing to a TTY. Fix them.
---
 src/bin/pg_checksums/pg_checksums.c | 3 ++-
 src/bin/pg_rewind/pg_rewind.c       | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/bin/pg_checksums/pg_checksums.c b/src/bin/pg_checksums/pg_checksums.c
index 1daa5aed0e0..9ae884897ef 100644
--- a/src/bin/pg_checksums/pg_checksums.c
+++ b/src/bin/pg_checksums/pg_checksums.c
@@ -626,7 +626,8 @@ main(int argc, char *argv[])
 		if (showprogress)
 		{
 			progress_report(true);
-			fprintf(stderr, "\n");	/* Need to move to next line */
+			if (isatty(fileno(stderr)))
+				fprintf(stderr, "\n");	/* Need to move to next line */
 		}
 
 		printf(_("Checksum operation completed\n"));
diff --git a/src/bin/pg_rewind/pg_rewind.c b/src/bin/pg_rewind/pg_rewind.c
index 0015d3b461a..c000c12fa58 100644
--- a/src/bin/pg_rewind/pg_rewind.c
+++ b/src/bin/pg_rewind/pg_rewind.c
@@ -422,7 +422,8 @@ main(int argc, char **argv)
 	executeFileMap();
 
 	progress_report(true);
-	printf("\n");
+	if (showprogress && isatty(fileno(stderr)))
+		fprintf(stderr, "\n");	/* Need to move to next line */
 
 	if (showprogress)
 		pg_log_info("creating backup label and updating control file");
-- 
2.20.1

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