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From: nsayer@quack.kfu.com
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Subject: bin/4514: stdio does not flush on fork()
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>Number:         4514
>Category:       bin
>Synopsis:       stdio does not flush on fork()
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Sep 11 17:00:01 PDT 1997
>Last-Modified:
>Originator:     Nick Sayer
>Organization:
Just me
>Release:        FreeBSD 2.2.2-RELEASE i386
>Environment:

>Description:

If the stdio buffers are not flushed, a fork() will replicate
the filled buffer to the child, resulting in doubling the data.
It is inconsistent, however you slice it, to have one printf
call result in multiple outputs.

>How-To-Repeat:

#include <stdio.h>

main()
{

printf("this will appear twice.");

fork();

}

>Fix:

>Audit-Trail:
>Unformatted: