Merge pull request #11048 from opensourcerouting/fix/fsync_before_fclose

vtysh: Call fflush+fsync before calling fclose() when saving the config

1 files changed, 12 insertions, 0 deletions

diff --git a/vtysh/vtysh.c b/vtysh/vtysh.c
index 0b85b2ea49..74886254bd 100644
--- a/vtysh/vtysh.c
+++ b/vtysh/vtysh.c
@@ -3361,6 +3361,18 @@ int vtysh_write_config_integrated(void)
 		err++;
 	}
 
+	if (fflush(fp) != 0) {
+		printf("%% Warning: fflush() failed on %s: %s\n", frr_config,
+		       safe_strerror(errno));
+		err++;
+	}
+
+	if (fsync(fd) < 0) {
+		printf("%% Warning: fsync() failed on %s: %s\n", frr_config,
+		       safe_strerror(errno));
+		err++;
+	}
+
 	fclose(fp);
 
 	printf("Integrated configuration saved to %s\n", frr_config);