#35894 [Opn]: php-imap doesn't trap USR2 when mailbox is locked

ID: 35894 User updated by: jik at kamens dot brookline dot ma dot us Reported By: jik at kamens dot brookline dot ma dot us Status: Open Bug Type: IMAP related Operating System: Linux PHP Version: 5.1.1 New Comment: Please look carefully at the output. The notices are not "harmless". Note that the message "successfully opened mailbox" only appears *once*. It should appear twice, because there are two processes who both want to open the mailbox. It only appears once because one of the two processes is killed by a USR2 signal as I've described. I don't know why the patch I sent didn't help for you. It reliably solves the problem for me. Perhaps I picked bad preprocessor symbols and it's not actually getting compiled into the object code on your system. Can you put debugging code in to see if the arm_signal calls are actually happening? Thanks. Previous Comments: ------------------------------------------------------------------------ [2006-01-05 01:01:06] sniper@php.net I get the same notices, which seem quite harmless anyway. And your patch did not make any difference whatsoever. ------------------------------------------------------------------------ [2006-01-04 21:53:23] jik at kamens dot brookline dot ma dot us libc-client-2002e-18.1 RPM from Fedora Core. I checked the current c-client sources from washington.edu and they seem susceptible to this problem as well, judging from an examination of the source code. The USR2 functionality has been in c-client since 1993, as far as I can tell. ------------------------------------------------------------------------ [2006-01-04 21:49:48] sniper@php.net Exactly what c-client version you linked PHP with? And how was it compiled? ------------------------------------------------------------------------ [2006-01-04 21:14:14] jik at kamens dot brookline dot ma dot us There's a patch which makes this problem go away at http://stuff.mit.edu/~jik/php-5.1.1-imap-usr2.patch.txt. However, rather than using the #if statement I used to figure out whether to enable the relevant code, you may want to insert a check for the function arm_signal in the c-client library in the configure script, define a cpp symbol if the function exists, and use my code if that cpp symbol is defined. ------------------------------------------------------------------------ [2006-01-04 19:59:55] tony2001@php.net >Did you run the script twice at the same time as I said in my report? Yes. And the mailbox is not empty. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/35894 -- Edit this bug report at http://bugs.php.net/?id=35894&edit=1