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Old 10-09-2009, 03:48 PM   #1
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Registered: Jul 2008
Posts: 2

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C code to use existing printer


I did C code to print strings over one printer. I used "fopen" and "fputs" to write through the parallel port.

FILE * stream = fopen ("/dev/lp0", "w");
fputs (MY_STRING, stream;

Now, I installed a new printer via USB. The printer installed itself and I can see it in my printer list (OS: openSUSE 10.2)

1. Can I use the same functions (see above) that I used to work with my USB printer?

2. If I can use the same functions, how can I know which usb port my printer uses. I did a "lsusb". I can see that my printer is located to Bus 003 Device 002. I read that usb printer are located in /dev/usb. I then used /dev/usb/lp0, but seems not working. Am I ok with that?

3. If I cannot use the same functions, what should I use to be able to send my data via the USB driver?

Thanks in advance.

Last edited by icarus_31; 10-09-2009 at 03:54 PM.
Old 10-09-2009, 04:02 PM   #2
Registered: Mar 2005
Posts: 130

Rep: Reputation: 17
No, lp0 is strictly the parallel port. Can't help you with the usb stuff, sorry.


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