Re[2]: get stdout/stderr while running a program

Re[2]: get stdout/stderr while running a program

[Nagash]

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Hello Victor,

Friday, November 29, 2002, 10:54:02 AM, you wrote:

>>  i've got a small problem with c-programs writing on
>>  stdout/stderr. i cannot see the output while running the
>>  program over the emacs shell access.
>>  after exiting the program the buffer gets filled.
>>  a simultaneous output mode would be nice for debug...

> Does your program flush the output?
yes, but only after exiting the program.

>   What happens if you run
>   it from a shell outside of emacs?
all output is immediately visible.

a little example:
/* c-code */
printf("my output");
/* "my output" now visible in the shell */

/* ... other lines of nice code */

exit(0);
/* "my output" now visible in my emacs buffer */


its a little bit exhausting to switch always between a shell
and emacs. it interrupts my working flow.


thanks for your help!

-- 
Best regards,
 Oliver                            mailto:nagash2270@yahoo.de


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RE: Re[2]: get stdout/stderr while running a program

[Victor Kirk]

Assuming there is not a probelm with emacs.  presumably 
other programs work fine under the shell.

> a little example:
> /* c-code */
> printf("my output");
> /* "my output" now visible in the shell */

stdout is buffered, so this is only output when the buffer
is full.  What happens if you explicity flush the output by

printf("my output");
fflush(stdout);

> exit(0);
> /* "my output" now visible in my emacs buffer */

This would cause the file buffer to be flushed to the output.


> its a little bit exhausting to switch always between a shell
> and emacs. it interrupts my working flow.

Quite right. One of the most useful things about running a
shell under emacs is you can search through the program's
output
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