function pg_checksums: the logic of processing the test result has been changed

fixed "ERROR: pg_checksums: data checksums validation - Failed"

/usr/lib/postgresql/10/bin/pg_checksums -c -D /tmp/rst/apdb-cluster-test
Checksum operation completed
Files scanned:  1776
Blocks scanned: 1160697
Blocks skipped: 83
Bad checksums:  0
Data checksum version: 1
postgres@smh-backuper:~$ echo $?
1

There are no errors, but the return code is 1.

At the same time, the return code is 0 for version 13:

/usr/lib/postgresql/13/bin/pg_checksums -c -D /tmp/rst/shdb-cluster-test
Checksum operation completed
Files scanned:  3220
Blocks scanned: 236147
Bad checksums:  0
Data checksum version: 1
postgres@smh-backuper:~$ echo $?
0

Now we do not rely on the return code, but explicitly check for the presence of "Bad checksums: 0" as a result of executing the pg_checksums command.

Author: vitabaks

pgbackrest_auto

@@ -522,8 +522,10 @@ function dummy_dump(){
 function pg_checksums(){
     if pgisready 1> /dev/null; then pg_stop cycle_simple pg_stop_check; fi
     info "pg_checksums: starting data checksums validation"
-    if ! /usr/lib/postgresql/"${PGVER}"/bin/pg_checksums -c -D "${TO}" 1> /dev/null
+    pg_checksums_result=$(/usr/lib/postgresql/"${PGVER}"/bin/pg_checksums -c -D "${TO}" | grep "Bad checksums")
+    if [[ $pg_checksums_result != "Bad checksums:  0" ]]
     then
+        warnmsg "pg_checksums: data checksums validation result: $pg_checksums_result"
         error "pg_checksums: data checksums validation - Failed"
     else
         info "pg_checksums: data checksums validation - Successful"