Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Tue, 27 May 2008 12:46:57 -0500

Mark Rivers wrote:

1) In seq 2-0-11 the executable snc.exe crashes when building state

programs. Thanks to Tim Graber, this was tracked down to the

following lines:

snc_main.c.orig: setvbuf(stdout, NULL, _IOLBF, 0);

snc_main.c.orig: setvbuf(stderr, NULL, _IOLBF, 0);

The problem lies with the final argument, SIZE. It appears that the

above syntax should be OK, because according to the Mac documentation

I found

*****

The setlinebuf() function is exactly equivalent to the call:
 setvbuf(stream, (char *)NULL, _IOLBF, 0);

*****

We have found that specifying a size like 1024 seems to work, but

what is the correct way to work around this bug in VC8, if indeed

that is what it is?

From my investigations, setvbuf() conforms to C89, and it appears the
default value for the final argument when buf is NULL is supposed to be
BUFSIZ, which works for me on Linux and Solaris. I thought I remembered
this — equivalent fixes were made to base/src/catools a few years ago.
I committed that change to seq/src/snc/snc_main.c in the EPICS CVS
repository.
- Andrew
--
Talk is cheap. Show me the code. -- Linus Torvalds

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System