FreeTDS Development Group

[Brian Bruns <camber AT ais.org>]

Ok wasn't very hopeful about that answer, but I had to give it a
try. Let's find out where it is crashing (this gets a bit more complex).

first compile PHP without apache (aka cgi mode) and then run your script
in gdb, such as:

$ gdb php
.....

(gdb) run myscript.php
...
core dump
...
(gdb) where
...
stack trace
...
(gdb) exit

And then send along the stack trace that is printed.


On Fri, 19 Oct 2001, David Derr wrote:

> After moving the conf file to a different name:
> [root etc]# ll                               
> total 4
> -rw-r--r--    1 root     root         2478 Oct 18 12:30 zzz_freetds.conf
> 
> And restarting apache...
> 
> I still get a segmentation fault:
> [Fri Oct 19 09:15:37 2001] [notice] child pid 28828 exit signal
> Segmentation fault (11)
> 
> David Derr
> Developer - Miles Media Group
> david.derr AT milesmedia.com
> 
> 
> 
> -----Original Message-----
> From: bounce-freetds-137737 AT franklin.oit.unc.edu
> [mailto:bounce-freetds-137737 AT franklin.oit.unc.edu] On Behalf Of Brian
> Bruns
> Sent: Friday, October 19, 2001 8:25 AM
> To: TDS Development Group
> Subject: [freetds] Re: PHP, FreeTDS and SQL Server 7
> 
> 
> Ok this may take a bit of leg work to solve, the big change from 0.51 to
> 0.52 was the freetds.conf file.  If you are still using the interfaces
> file then move /usr/local/freetds/etc/freetd.conf to another name and
> see if the behaviour changes. 
> 
> Brian
> 
> On Thu, 18 Oct 2001, David Derr wrote:
> 
> > Brian,
> > 
> > I am not sure what changed between 0.51 and the later versions, but 
> > when I tried 0.52 and 0.53pre1 I get seg faults on the apache child 
> > when I try to make a database connection.  My system is RedHat 6.2 
> > connection to a Win NT Server running SQL7.
> > 
> > Obviously I have not had a chance to test the configuration with these
> 
> > later versions because of the seg faults ([Thu Oct 18 22:03:12 2001] 
> > [notice] child pid 28386 exit signal Segmentation fault (11)).  Can 
> > you see anything I am doing wrong?
> > 
> > Here is my build script:
> > 
> > All done as root...
> > FREE TDS 0.53
> > /configure --prefix=/usr/local/freetds --with-tdsver=4.2 
> > --enable-dbmfix gmake
> > make install
> > 
> > edit /etc/profile adding:
> > export SYBASE=/usr/local/freetds
> > 
> > Add to /etc/ld.so.conf:
> > /usr/local/freetds/lib
> > Run ldconfig so that the libraries will be found by the linker
> > 
> > 
> > APACHE 1.3.14 (the following configuration options assume that php and
> 
> > apache are in parallel directories) /configure 
> > --prefix=/usr/local/apache_test
> > 
> > 
> > PHP 4.0.6
> > /configure --with-mysql --with-apache=../apache_1.3.14 
> > --enable-track-vars --with-mssql=/usr/local/freetds 
> > --with-sybase=/usr/local/freetds 
> > --with-config-file-path=/usr/local/apache_test/conf
> > make
> > make install
> > 
> > 
> > APACHE 1.3.14
> > /configure --prefix=/usr/local/apache_test 
> > --activate-module=src/modules/php4/libphp4.a
> > make
> > make install
> > 
> > Also add the above to the startup script that starts the web server. 
> > SYBASE=/usr/local/freetds
> > 
> > Thanks,
> > David Derr
> > 
> > -----Original Message-----
> > From: bounce-freetds-137737 AT franklin.oit.unc.edu
> > [mailto:bounce-freetds-137737 AT franklin.oit.unc.edu] On Behalf Of Brian
> 
> > Bruns
> > Sent: Thursday, October 18, 2001 12:46 PM
> > To: TDS Development Group
> > Subject: [freetds] Re: PHP, FreeTDS and SQL Server 7
> > 
> > 
> > There is a bug in 0.52 regarding the ip lookup that affects some 
> > platforms.  It is fixed in either 0.53pre1 or the CVS version.
> > 
> > Brian
> > 
> > On Thu, 18 Oct 2001, David Derr wrote:
> > 
> > > Hello.  I am trying to use freetds in conjunction with php and MS 
> > > SQL
> > > Server 7.  I have posted a couple quiestions to the php mailing
> list, 
> > > but have hit a wall there.
> > > 
> > > I have included the reply I recieved to the first post and my second
> > > post below.  I believe I have a configuration problem unrelated to
> php
> > 
> > > or the database because it seems freetds always wants to connect to
> > > 255.255.255.255 port 0 and that is not what I had in the interfaces 
> > > file.
> > > 
> > > Any help would be greatly appreciated.  I am sooo close and I really
> > > hope this solution will perform better than our existing one which
> is 
> > > using an ODBC bridge.
> > > 
> > > Thanks!
> > > David Derr
> > > 
> > > 
> > > Posteded to the PHP General Mailing List...
> > > 
> > > Thanks for you build record, that helped greatly,  I think my main
> > > problem was using 0.52 instead of 0.51.
> > > 
> > > No more seg faults now when I try to run my script, but I am still 
> > > not
> > 
> > > getting a connection to the database, and I think the problem may be
> > > the fact the freetds is not finding any configuration information.  
> > > Here is the php script I am running:
> > > 
> > > <?
> > > putenv("TDSDUMP=/usr/local/apache_test/logs/tds.log");
> > > 
> > > $nDBConn = mssql_connect("mmg", "username", "passwd");
> > > echo "ConnectID: $nDBConn<br>\n";
> > > 
> > > $nStmt = mssql_query("select * from david_test", $nDBConn);
> > > 
> > > while ($aRow = mssql_fetch_array($nStmt)) {
> > >         echo $aRow["Name"];
> > >         echo "<p>\n";
> > > }
> > > 
> > > mssql_close($nDBConn);
> > > echo "hello dave";
> > > ?>
> > > 
> > > And when this runs there are connection errors, but if I look in the
> > > TDSDUMP file I specified at the beginning of the script I see this 
> > > (which is not the ip or port I specified in my interfaces file): 
> > > 2001-10-17 09:39:24 Connecting addr 255.255.255.255 port 0
> > > 
> > > Along with these errors in my Apache error log file:
> > > connect: Network is unreachable
> > > DB-Library: Login incorrect.
> > > 
> > > Here is my interfaces file, located at /usr/local/freetds mmg
> > >         query tcp tds4.2 ip.of.db.server 1433
> > > 
> > > And last, here is the value of the SYBASE env variable: [root 
> > > /root]# echo $SYBASE /usr/local/freetds
> > > 
> > > Did you or anyone else run in to this problem?  I looked in the 
> > > config
> > 
> > > file to see if there was a path you could specify for the interfaces
> > > file but found only an alternate method of configuring freetds, so I
> 
> > > renamed it to zzz_freetds.conf and still get the error message
> saying 
> > > it is connecting to 255.255.255.255.
> > > 
> > > Thanks again in advance for any help.
> > > 
> > > David Derr
> > > davidderr AT britsys.net
> > > 
> > > 
> > > -----Original Message-----
> > > From: Nick Talbott [mailto:nickt AT powys.gov.uk]
> > > Sent: Tuesday, October 16, 2001 11:45 AM
> > > To: David Derr; php-general AT lists.php.net
> > > Subject: Re: [PHP] FreeTDS and SQL Server 7
> > > 
> > > On Tuesday 16 October 2001 4:18 pm, David Derr wrote:
> > > > Hey all, I was reading an old article at php builder about
> > > > conntecting to SQL Server 7 on a Windows machine from a Linux 
> > > > machine via FreeTDS.
> > > > (http://www.phpbuilder.com/columns/alberto20000919.php3)
> > > [snip]
> > > >
> > > > Has anyone had sucees in getting this to work?  I will include my
> > > > config and compile commands below as well as the php script that
> is 
> > > > breaking things.
> > > [snip]
> > > 
> > > We have that working reliably with the exception that I have used 
> > > TDS protocol version 4.2 rather than 7.0 because I had read that 
> > > this was
> > a
> > > little less well developed, and 4.2 gives you all you need in any
> > case.
> > > 
> > > We're using slightly different components:  Apache 1.3.20, PHP 
> > > 4.0.6,
> > > FreeTDS 0.51 running on a Slackware 8.0 base (Linux kernel 2.2.19
> with
> > 
> > > glibc
> > > 2.2.3)
> > > 
> > > I've attached an HTML file of our build record for this.
> > > 
> > > The other thing to note is that this approach allows you to use 
> > > PHP's
> > > mssql_ calls, but only those that have direct sybase_ equivalents.
> So
> > 
> > > make sure you
> > > check out which calls are common to both sets of functions and don't
> > try
> > > calls that only exist in the mssql_ function list.
> > > 
> > > Regards
> > > 
> > > Nick Talbott, IT Policy and Strategy Manager, Powys County Council
> > > email:    nickt AT powys.gov.uk
> > > fax:      01597 824781
> > > web:      www.powys.gov.uk and www.powysweb.co.uk
> > > 
> > > 
> 
> 
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