pg_upgrade: make get_major_server_version() err msg consistent

This patch fixes the error message in get_major_server_version() to be
"could not parse version file", and uses the full file path name, rather
than just the data directory path.

Also, commit 4109bb5de4 added the cause of the failure to the  "could
not open" error message, and improved quoting.  This patch backpatches
the "could not open" cause to PG 12, where it was first widely used, and
backpatches the quoting fix in that patch to all supported releases.

Reported-by: Tom Lane
Discussion: https://postgr.es/m/[email protected]

Author: Dagfinn Ilmari Mannsåker

Backpatch-through: 9.5

diff --git a/src/bin/pg_upgrade/server.c b/src/bin/pg_upgrade/server.c
index 6ad4b14e16a36db1b12246eb0f3a897ca7da2df8..0b5967c49b81b82329de9c2ea75ecca3e3b39e37 100644 (file)
--- a/src/bin/pg_upgrade/server.c
+++ b/src/bin/pg_upgrade/server.c
@@ -165,11 +165,11 @@ 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 version file \"%s\"\n", ver_filename);
 
    fclose(version_fd);