Re: [PATCH] pg_upgrade: report the reason for failing to open the cluster version file

Daniel Gustafsson <daniel@yesql.se> writes:

> A few lines further down from this we report an error in case we are unable to
> parse the file in question:
>
>         pg_fatal("could not parse PG_VERSION file from %s\n", cluster->pgdata);
>
> Should the pgdata argument be quoted there as well, like \"%s\", to make it
> consistent for how we report filenames and directories in pg_upgrade?

Good point, I agree we should. Updated patch attached.

- ilmari
-- 
"A disappointingly low fraction of the human race is,
 at any given time, on fire." - Stig Sandbeck Mathisen

From a503ffdb1499e73bfb75373a9af2e766e279beeb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dagfinn=20Ilmari=20Manns=C3=A5ker?= <ilmari@ilmari.org>
Date: Tue, 25 Feb 2020 18:07:14 +0000
Subject: [PATCH v2] pg_upgrade: add %m to version file open failure message

Also quote the file name in the error messages.
---
 src/bin/pg_upgrade/server.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/bin/pg_upgrade/server.c b/src/bin/pg_upgrade/server.c
index e244256501..be604d3351 100644
--- a/src/bin/pg_upgrade/server.c
+++ b/src/bin/pg_upgrade/server.c
@@ -164,11 +164,11 @@ get_major_server_version(ClusterInfo *cluster)
     snprintf(ver_filename, sizeof(ver_filename), "%s/PG_VERSION",
              cluster->pgdata);
     if ((version_fd = fopen(ver_filename, "r")) == NULL)
-        pg_fatal("could not open version file: %s\n", ver_filename);
+        pg_fatal("could not open version file \"%s\": %m\n", ver_filename);
 
     if (fscanf(version_fd, "%63s", cluster->major_version_str) == 0 ||
         sscanf(cluster->major_version_str, "%d.%d", &v1, &v2) < 1)
-        pg_fatal("could not parse PG_VERSION file from %s\n", cluster->pgdata);
+        pg_fatal("could not parse PG_VERSION file from \"%s\"\n", cluster->pgdata);
 
     fclose(version_fd);
 
-- 
2.22.0