#23521 [Com]: any include() call causes 'input in flex scanner failed' error

ID: 23521 Comment by: jsl123 at web dot de Reported By: joe at cityofsanmateo dot org Status: Open Bug Type: Scripting Engine problem Operating System: linux 2.4.20 - uclibc PHP Version: 4.3.1 New Comment: Hi again! I finaly nailed it down to be a problem in handling the input buffer reading in Zend/zend_language_scanner.c! With the patch below the resulting phps will work with "include()" and "require()" but I know that this so patched file gets generated by lex (flex) and so one should perhaps change either the .l input or the Zend/flex.skl file(s). But I did know that there is a big chance that a call to fread() might return 0 as a result and that this is absolutely legal and no reason to bail out. And in my understanding from flex.skl this is what YY_INPUT() was defined to tolerate (aka only bail out if fread() returns < 0)! But since I'm no flex god, I will leave this to whom it may concern ;-) Salut, Joerg BTW: jsl@floyd:~/projekte/ep2/src/php-4.3.1> flex -V flex version 2.5.4 Of course the follwing hunk will fail on any other machine since every other implementation/version of lex (flex) would have generated other line numbers... :-) --- snip ------------------------------------------------------------ *** Zend/zend_language_scanner.c Wed May 7 12:04:39 2003 --- Zend/zend_language_scanner.c.orig Wed May 7 12:04:35 2003 *************** *** 3521,3527 **** YY_FATAL_ERROR( "input in flex scanner failed" ); \ result = n; \ } \ ! else if ( ((result = fread( buf, 1, max_size, yyin )) < 0) \ && ferror( yyin ) ) \ YY_FATAL_ERROR( "input in flex scanner failed" ); #endif --- 3521,3527 ---- YY_FATAL_ERROR( "input in flex scanner failed" ); \ result = n; \ } \ ! else if ( ((result = fread( buf, 1, max_size, yyin )) == 0) \ && ferror( yyin ) ) \ YY_FATAL_ERROR( "input in flex scanner failed" ); #endif --- snap ------------------------------------------------------------ Previous Comments: ------------------------------------------------------------------------ [2003-05-07 04:01:06] jsl123 at web dot de a few other tests: it's not the permissions. I tried a complete accessible file in a wide open dir... including or requiring from an absolute path gives the same error there's no difference if the file is empty or text/plain or text/html Joerg ------------------------------------------------------------------------ [2003-05-07 03:46:20] jsl123 at web dot de Same here. (same kernel, uClibc version, php version) I did configure with: "CFLAGS=-march=i486 ... --disable-all" against the same ver. of uClibc and also re-conf'd and recompiled the Zend engine but to no avail. Add. tests have been done with changed php.ini's (exact path was included/not included). It's *not* a problem of finding the file! require('') gives the same error :-( sapi/cli/php also yieds the same output If someone with better knowledge about debugging flex-engines is reading this, I would like to mail her my phpinfo() and help with testing... Thank you. Salut, Joerg ------------------------------------------------------------------------ [2003-05-06 20:55:21] joe at cityofsanmateo dot org compiled php 4.3.1 against uclibc 0.9.19 using the development image supplied at www.uclibc.org configured with configure --disable-ipv6 eveything compiles and runs but any include() 'd calls fail with 'input in flex scanner failed', to replicate, once compiled run: #touch tmpfile # #echo "<?php include('tmpfile') ?>"|php i think it might be a uclibc issue as it runs fine, on the same machine but compiled under redhat 9, but not sure ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=23521&edit=1