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Fix incorrect wording about function failure time on unsafe ops - these

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are now caught by the validator. And a small visit from the perl style police:
check the return value from open().
This commit is contained in:
Andrew Dunstan 2005-10-24 15:39:50 +00:00
parent 819159709f
commit 24fa8746ae
1 changed files with 8 additions and 4 deletions
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12
doc/src/sgml/plperl.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/plperl.sgml,v 2.47 2005/10/18 22:53:54 adunstan Exp $
$PostgreSQL: pgsql/doc/src/sgml/plperl.sgml,v 2.48 2005/10/24 15:39:50 adunstan Exp $
-->
<chapter id="plperl">
@ -554,12 +554,16 @@ $$ LANGUAGE plperl;
system operations are not allowed for security reasons:
<programlisting>
CREATE FUNCTION badfunc() RETURNS integer AS $$
open(TEMP, "&gt;/tmp/badfile");
print TEMP "Gotcha!\n";
my $tmpfile = "/tmp/badfile";
open my $fh, '&gt;', $tmpfile
or elog(ERROR, qq{Could not open the file "$tmpfile": $!});
print $fh "Testing writing to a file\n";
close $fh or elog(ERROR, qq{Could not close the file "$tmpfile": $!});
return 1;
$$ LANGUAGE plperl;
</programlisting>
The creation of the function will succeed, but executing it will not.
The creation of this function will fail as its use of a forbidden
operation will be be caught by the validator.
</para>
<para>