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commit    24872bbf9288d8949b3f2ed60c0f3ef12015016f
Author:   Michael Paquier <michael@paquier.xyz>
Date:     Mon Aug 01 07:39:33 2022 +0000
First released in: 16.0, 12.12, 13.8, 14.5, 15.0

    Fix error reporting after ioctl() call with pg_upgrade --clone
    
    errno was not reported correctly after attempting to clone a file,
    leading to incorrect error reports.  While scanning through the code, I
    have not noticed any similar mistakes.
    
    Error introduced in 3a769d8.
    
    Author: Justin Pryzby
    Discussion: https://postgr.es/m/20220731134135.GY15006@telsasoft.com
    Backpatch-through: 12


 src/bin/pg_upgrade/file.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/bin/pg_upgrade/file.c b/src/bin/pg_upgrade/file.c
index c7fed24df93..76d18e9f094 100644
--- a/src/bin/pg_upgrade/file.c
+++ b/src/bin/pg_upgrade/file.c
@@ -62,9 +62,11 @@ cloneFile(const char *src, const char *dst,
 
 	if (ioctl(dest_fd, FICLONE, src_fd) < 0)
 	{
+		int			save_errno = errno;
+
 		unlink(dst);
 		pg_fatal("error while cloning relation \"%s.%s\" (\"%s\" to \"%s\"): %s\n",
-				 schemaName, relName, src, dst, strerror(errno));
+				 schemaName, relName, src, dst, strerror(save_errno));
 	}
 
 	close(src_fd);


[parent: 4349a76158e5]