Kill pg_basebackup background process when exiting

If an error occurs in the foreground (backup) process of pg_basebackup,
and we exit in a controlled way, the background process (streaming
xlog process) would stay around and keep streaming.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/bin/pg_basebackup/pg_basebackup.c b/src/bin/pg_basebackup/pg_basebackup.c
index a6e320c0f22..c27c6332ce7 100644
--- a/src/bin/pg_basebackup/pg_basebackup.c
+++ b/src/bin/pg_basebackup/pg_basebackup.c
@@ -76,6 +76,7 @@ static PQExpBuffer recoveryconfcontents = NULL;
 
 /* Function headers */
 static void usage(void);
+static void disconnect_and_exit(int code);
 static void verify_dir_is_empty_or_create(char *dirname);
 static void progress_report(int tablespacenum, const char *filename, bool force);
 
@@ -88,6 +89,26 @@ static void BaseBackup(void);
 static bool reached_end_position(XLogRecPtr segendpos, uint32 timeline,
 					 bool segment_finished);
 
+
+static void disconnect_and_exit(int code)
+{
+	if (conn != NULL)
+		PQfinish(conn);
+
+#ifndef WIN32
+	/*
+	 * On windows, our background thread dies along with the process.
+	 * But on Unix, if we have started a subprocess, we want to kill
+	 * it off so it doesn't remain running trying to stream data.
+	 */
+	if (bgchild> 0)
+		kill(bgchild, SIGTERM);
+#endif
+
+	exit(code);
+}
+
+
 #ifdef HAVE_LIBZ
 static const char *
 get_gz_error(gzFile gzf)