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Mailing lists / fpc-pascal / 2009-02

Sockets in FPC

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Nataraj S Narayan

Hi

I need to write a daemon on Linux which will wait on a user defined port (say 30000) and parse the socket input to write into a Mysql database. Can anybody suggest examples in FPC ?

Presently , I am using TCL for this. The problem is the behaviour of Gets function in TCL.. It is buffered with EOF as newline.

But i need the socket to have a user defined char like ':' and it should be unbuffered too. I mean dont want an Enter keyed to be at the end.

We use various GPRS modules on embedded devices, each with its own nuances of terminating a string. So we can't afford to have a 'normal' gets or readln behaviours.

Please help

regards

Nataraj

Paul Nicholls
Show quoted text 23 lines
Hi I need to write a daemon on Linux which will wait on a user defined port (say 30000) and parse the socket input to write into a Mysql database. Can anybody suggest examples in FPC ? Presently , I am using TCL for this. The problem is the behaviour of Gets function in TCL.. It is buffered with EOF as newline. But i need the socket to have a user defined char like ':' and it should be unbuffered too. I mean dont want an Enter keyed to be at the end. We use various GPRS modules on embedded devices, each with its own nuances of terminating a string. So we can't afford to have a 'normal' gets or readln behaviours. Please help regards Nataraj

Hi Nataraj,
I'm not sure about actual code examples, but you could try the Synapse Pascal TCP/IP library classes, they work on Win32, Linux and I'm pretty sure MAC OS too :-)

http://www.ararat.cz/synapse/doku.php

cheers,
Paul

Lukas Gradl
to Nataraj S Narayan: Hi I need to write a daemon on Linux which will wait on a user defined port (say 30000)…
Show quoted text 16 lines
Hi I need to write a daemon on Linux which will wait on a user defined port (say 30000) and parse the socket input to write into a Mysql database. Can anybody suggest examples in FPC ? Presently , I am using TCL for this. The problem is the behaviour of Gets function in TCL.. It is buffered with EOF as newline. But i need the socket to have a user defined char like ':' and it should be unbuffered too. I mean dont want an Enter keyed to be at the end. We use various GPRS modules on embedded devices, each with its own nuances of terminating a string. So we can't afford to have a 'normal' gets or readln behaviours.

Take a look at synapse and the examples provided with the source and on their page. I remember there was a well documented example for a ftp-server, which uses exactly the techniques you need for building a service.

To daemonize a program on linux there are quite some examples on the net.

regards
Lukas

-------------------------- software security networks Lukas Gradl <fpc#ssn.at> Eduard-Bodem-Gasse 9 A - 6020 Innsbruck Tel: +43-512-214040-0 Fax: +43-512-214040-21 --------------------------