Re: BUG #6715: 9.2b2 psql \ir does not understand leading ../

jgd(at)well(dot)com writes:
> When I do
> \ir ../bar.sql
> I get the bar.sql file in the CWD.

AFAICS, it works fine when \ir is used interactively. However,
you seem to be using it from a script:

> $ psql -aX greg -f foo.sql

and then indeed it does not work so well. psql is trying to evaluate
the \ir relative to the script file's location, using this code:

snprintf(relpath, MAXPGPATH, "%s", pset.inputfile);
get_parent_directory(relpath);
join_path_components(relpath, relpath, filename);
canonicalize_path(relpath);

The get_parent_directory() call reduces "foo.sql" to an empty string,
which seems a tad bogus --- wouldn't "." be better? But in any case,
join_path_components() thinks it can process a "../" prefix of the
tail argument by stripping a directory name from the head argument,
and there's nothing there to strip. So IMO join_path_components()
is flat-out broken when applied to a non-absolute head path.
Not sure about what a useful solution would be.

regards, tom lane