note 106588 added to function.dba-open

The other day i was struggeling with some strange behaviour, of two concurrently running scripts, that i want to share here. I am omitting most of the error handling for brevity. script1: $h = dba_open("file_a", 'r', 'gdbm'); while (true) { dba_fetch("somekey", $h); sleep(1); } dba_close($h); ______________________ script2: // while script1 is running until eternity... $ok = rename("file_a", "file_b"); if (! $ok) echo "Could not move\n"; else echo "I like to move it, move it!\n"; // GOAL: Manipulate the file only if it is not opened for reading... RESULT: I like to move it, move it! So you can very well rename a file, while it is opened. The lookup in script1 is still working. Manipulating the file in script2 will fail, as there is still an gdbm lock on the file from script1. ---- Server IP: 212.124.37.9 Probable Submitter: 194.25.133.14 ---- Manual Page -- http://www.php.net/manual/en/function.dba-open.php Edit -- https://master.php.net/note/edit/106588 Del: integrated -- https://master.php.net/note/delete/106588/integrated Del: useless -- https://master.php.net/note/delete/106588/useless Del: bad code -- https://master.php.net/note/delete/106588/bad+code Del: spam -- https://master.php.net/note/delete/106588/spam Del: non-english -- https://master.php.net/note/delete/106588/non-english Del: in docs -- https://master.php.net/note/delete/106588/in+docs Del: other reasons-- https://master.php.net/note/delete/106588 Reject -- https://master.php.net/note/reject/106588 Search -- https://master.php.net/manage/user-notes.php