On Jan 15 11:39, Tom Honermann wrote:
> On 01/13/2014 11:06 AM, tedno...@bellsouth.net wrote:
> ...
> > switch (fork()) {
> >
> > /* error */
> > case -1:
> ...
> > /* child */
> > case 0:
> > fprintf(stderr, "child\n"); fflush(stderr);
> > exit(0);
> > break;
>
> The above code is incorrect. It is always wrong to call exit() from
> a forked process that has not yet called one of the exec() family of
> functions. _exit() should be called instead. Best case, calling
> exit() will result in double flushing of any stream buffers held by
> the parent at the time fork() is called (since the buffers will
> (eventually) be flushed by the parent as well as the child (unless
> at least one of the processes aborts or exits with _exit()).Still, SUSv4 says: The exit() function shall then flush all open streams with unwritten buffered data and close all open streams. Finally, the process shall be terminated [...] Note that exit only flushes streams with *unwritten* data, but not streams with *unread* data. So this testcase is still valid and should work. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat
pgps53eyLIgyR.pgp
Description: PGP signature
