If anyone does something in perl that uses both perl's output and
something that exec(3)s something, the perl output will not necessarily be
flushed before the other output happens.
eg.
#!/usr/local/bin/crey
print "Content-type: text/plain\n\n";
system("/bin/ls");
will fail on many systems because the output from ls happens
before perl flushes its buffers. A similar thing happens in C
on many systems. On some systems, you will never run into
this problem.
On Fri, 18 Apr 1997, Dean Gaudet wrote:
> Why are we recommending $| = 1 all the time? I've never had to do this in
> my CGIs.
>
> Dean
>
> On Fri, 18 Apr 1997, Marc Slemko wrote:
> > Have you checked the error log? This is almost certainly a bug in your
> > CGI script. Try adding "$| = 1;" near the start of your program and be
> > sure you correctly output the header.
>
