ID: 26332 Comment by: dtorop933 at gmail dot com Reported By: foxkill at gmx dot de Status: Open Bug Type: cURL related Operating System: Linux PHP Version: 5.0.0RC1-dev New Comment:
This appears related to the version of libcurl installed. Running libcurl 7.12.3, foxkill's code works properly for me. Trying curl 7.12.0, 7.12.1, and 7.12.2, I see the same endless loop as foxkill. (This with PHP 5.0.3 on Linux machines running either Debian sarge w/2.6.10 kernel or redhat 9 w/2.4.27 kernel.) The key revision to libcurl seems to be a change to how curl handles file descriptors on 2004/11/19 08:52:33 UTC. Using curl source from CVS before this date I get the endless loop, after this things work. I don't understand ramifications of the patch, though, clearly isn't all or nothing, as sniper saw no problem on 3/15/04, well before the patch or libcurl 7.12.3. Previous Comments: ------------------------------------------------------------------------ [2004-03-17 06:07:57] foxkill at gmx dot de I did try the latest snapshots. But the problem is still existent. Perhaps I should have mentioned that I use a debug version of php-cli and the php curl library as shared module. In a realease build with compiled in curl it seems to work as expected. Did you read my additional comments that I provided with the example script on http://www.secnow.de/websearch/websearch.txt? The problem seems to be related to the fd_set variables that are set in curl_multi_perform. When curl_multi_exec is called these fd_set variables are no longer available. ------------------------------------------------------------------------ [2004-03-15 10:48:48] [EMAIL PROTECTED] Please try using this CVS snapshot: http://snaps.php.net/php5-latest.tar.gz For Windows: http://snaps.php.net/win32/php5-win32-latest.zip Works fine for me with latest CVS snapshot. ------------------------------------------------------------------------ [2004-02-25 05:08:08] foxkill at gmx dot de You'll find the script to reproduce the error under: http://www.secnow.de/websearch/websearch.txt The script runs either in an endless loop or if it terminates it prints: Last leak repeated 2 times /opt/local/src/lamp/php5-src/ext/curl/multi.c(62) : Freeing 0x40291A34 (8 bytes), script=websearch.php === Total 4 memory leaks detected === ------------------------------------------------------------------------ [2003-11-20 09:48:05] foxkill at gmx dot de Description: ------------ I try to use curl_multi_fdset() together with curl_multi_exec() in php5. But this doesn't work. I modelled my php code after the sample (multi-app.c) which is provided by the curl-src package. Reproduce code: --------------- this is the code I use for php5 (three single curl handles were added): while (CURLM_CALL_MULTI_PERFORM == curl_multi_exec($m, $still_running)) ; while ($still_running) { $fd = curl_multi_select($m, 1); switch($fd) { case -1: break; case 0: default: while (CURLM_CALL_MULTI_PERFORM == curl_multi_exec($m, $still_running)) ; } } Expected result: ---------------- The code should behave like the multi-app.c sample. See [curl-src]/docs/examples/multi-app.c. Actual result: -------------- The code runs in an endless loop. Because curl_multi_exec() (alias curl_multi_perform()) needs to reference the variables readfds, writefds which were set by a previous call to curl_multi_fdset(). But these fdsets have gone out of scope. The C Code works because the fdsets are still present on the stack. See man 3 curl_multi_fdset for further details. curl --version gives: curl 7.10.8 (i686-pc-linux-gnu) libcurl/7.10.8 OpenSSL/0.9.7c zlib/1.1.4 Protocols: ftp gopher ldap http file https ftps Features: SSL libz NTLM ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=26332&edit=1
