300bps soundmodem notes and Broken Pipe

Hi,

You could try adding this in soundmodem :

#include<signal.h>
...
main()
...
...
signal (SIGPIPE, SIG_IGN);

73 de Bernard, f6bvp

-----Original Message-----
John,

Excellent note to the soundmodem beginners.

Concerning the soundmodem program, I often experience "broken pipe" errors in high speed transmission setting with slow CPU machines and it looks like one of the popular questions unexplained.

Can I have suggestion from the experienced linux-hams the proper ways to fix?

Regards,

take

de JA5AEA

Hello Bernard,

Thank you for picking up my question about "Broken pipe" issue and sending your suggestion.

Please be patient for a while as I am not any computer language programmer at all.

I read the source file of soundmodem and I believe the error message comes from the second logprintf statement (line 368) in alsaio.c program.

---------------------------alsaio.c-------------------------------- static inline void iotxstart(struct audioio_unix *audioio)

{      
        int err;
       
        if (snd_pcm_prepare(audioio->playback_handle) < 0) {
                logprintf(MLOG_ERROR, "Error preparing tx.\n");
        }
        err = snd_pcm_start(audioio->playback_handle);
        if (err < 0)
                logprintf(MLOG_ERROR, "snd_pcm_start in iotxstart: %s",

snd_strerror(err));
}
-------------------------------------------------------------------

Can you explain me the following questions concerning your suggestion?

1. Are you suggesting adding additional three lines in alsaio.c program? If yes, which exact lines should I add?

2. What is the purpose and expected result of signal (SIGPIPE, SIG_IGN) addition?

I am waiting your response soon.

Regards,

take

de JA5AEA
-----Original Message-----
From: f6bvp [mailto:[email protected]]
Sent: Monday, December 06, 2010 7:24 PM
To: [email protected]; linux-hams
Subject: RE: 300bps soundmodem notes and Broken Pipe

Hi,

You could try adding this in soundmodem :

#include<signal.h>
...
main()
...
...
signal (SIGPIPE, SIG_IGN);

73 de Bernard, f6bvp

-----Original Message-----
John,

Excellent note to the soundmodem beginners.

Concerning the soundmodem program, I often experience "broken pipe" errors in high speed transmission setting with slow CPU machines and it looks like one of the popular questions unexplained.

Can I have suggestion from the experienced linux-hams the proper ways to fix?

Regards,

take

de JA5AEA