d6bf0ab170
pg_waldump (--start/--end), pg_recvlogical (--startpos/--endpos), and
pg_receivewal (--endpos) parsed user-supplied WAL locations with
sscanf("%X/%08X"). That accepts several forms rejected by pg_lsn input
and can proceed with a different location than the user specified:
overlong components, trailing characters, leading whitespace, signs, and
0x prefixes.
Add pg_parse_lsn() to src/common and use it for those command-line
options. The helper accepts the pg_lsn text syntax only: one to eight
hexadecimal digits, a slash, one to eight hexadecimal digits, and no
trailing characters. Each frontend tool keeps its existing error
message.
Use the same helper from pg_lsn_in_safe(), leaving only backend-specific
soft error reporting there. This keeps frontend command-line validation
and backend pg_lsn input tied to one parser.
Bug: #19598
Reported-by: Michael Malis <malis@pgrust.com>
Author: Zexin Li <lizi.openmind@gmail.com>
Reviewed-by: Ayush Tiwari <ayushtiwari.slg01@gmail.com>
Reviewed-by: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/19598-aa67c8f4331611b4@postgresql.org
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.