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commit    a7b92d1c6807750723b668bc2bdde1c4698c9d64
Author:   Michael Paquier <michael@paquier.xyz>
Date:     Thu Sep 14 01:30:30 2023 +0000

    Improve error message on snapshot import in snapmgr.c
    
    When a snapshot file fails to be read in ImportSnapshot(), it would
    issue an ERROR as "invalid snapshot identifier" when opening a stream
    for it in read-only mode.  This error message is reworded to be the same
    as all the other messages used in this case on failure, which is useful
    when debugging this area.
    
    Thinko introduced by bb446b689b66 where snapshot imports have been
    added.  A backpatch down to 11 is done as this can improve any work
    related to snapshot imports in older branches.
    
    Author: Bharath Rupireddy
    Reviewed-by: Daniel Gustafsson
    Discussion: https://postgr.es/m/CALj2ACWmr=3KdxDkm8h7Zn1XxBoF6hdzq8WQyMn2y1OL5RYFrg@mail.gmail.com
    Backpatch-through: 11


 src/backend/utils/time/snapmgr.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/backend/utils/time/snapmgr.c b/src/backend/utils/time/snapmgr.c
index 3037cf478d1..dbba2f7d7b2 100644
--- a/src/backend/utils/time/snapmgr.c
+++ b/src/backend/utils/time/snapmgr.c
@@ -1443,8 +1443,9 @@ ImportSnapshot(const char *idstr)
 	f = AllocateFile(path, PG_BINARY_R);
 	if (!f)
 		ereport(ERROR,
-				(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
-				 errmsg("invalid snapshot identifier: \"%s\"", idstr)));
+				(errcode_for_file_access(),
+				 errmsg("could not open file \"%s\" for reading: %m",
+						path)));
 
 	/* get the size of the file so that we know how much memory we need */
 	if (fstat(fileno(f), &stat_buf))


[parent: 6341cb0b02ae]