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Don't strip $libdir from LOAD command

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Commit 4f7f7b0375 implemented the extension_control_path GUC, and to
make it work it was decided that we should strip the $libdir/ on
module_pathname from .control files, so that extensions don't need to
worry about this change.

This strip logic was implemented on expand_dynamic_library_name()
which works fine when executing the SQL functions from extensions, but
this function is also called when the LOAD command is executed, and
since the user may explicitly pass the $libdir prefix on LOAD
parameter, we should not strip in this case.

This commit fixes this issue by moving the strip logic from
expand_dynamic_library_name() to load_external_function() that is
called when the running the SQL script from extensions.

Reported-by: Evan Si <evsi@amazon.com>
Author: Matheus Alcantara <matheusssilv97@gmail.com>
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Reviewed-by: Rahila Syed <rahilasyed90@gmail.com>
Bug: #18920
Discussion: https://www.postgresql.org/message-id/flat/18920-b350b1c0a30af006%40postgresql.org
This commit is contained in:
Peter Eisentraut
2025-06-04 11:21:24 +02:00
parent 7f3381c7ee
commit f777d77387
1 changed files with 8 additions and 8 deletions
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16
src/backend/utils/fmgr/dfmgr.c
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@ -99,6 +99,14 @@ load_external_function(const char *filename, const char *funcname,
void *lib_handle;
void *retval;
/*
* If the value starts with "$libdir/", strip that. This is because many
* extensions have hardcoded '$libdir/foo' as their library name, which
* prevents using the path.
*/
if (strncmp(filename, "$libdir/", 8) == 0)
filename += 8;
/* Expand the possibly-abbreviated filename to an exact path name */
fullname = expand_dynamic_library_name(filename);
@ -456,14 +464,6 @@ expand_dynamic_library_name(const char *name)
Assert(name);
/*
* If the value starts with "$libdir/", strip that. This is because many
* extensions have hardcoded '$libdir/foo' as their library name, which
* prevents using the path.
*/
if (strncmp(name, "$libdir/", 8) == 0)
name += 8;
have_slash = (first_dir_separator(name) != NULL);
if (!have_slash)