Unix doesn't work !

[William Kucharski]

In article <407 at retix.retix.COM> randy at retix.retix.com.UUCP (Miyazaki Randy) writes:
 >Why does the child read not terminate with a End of File indication ?
 >Bizzarely enough, the program hangs both under BSD 4.3 and
 >S5R3 (Interactive VP/IX 1.0.6). This seems to contradict any
 >documentation on pipes I have seen.
 >
Although it's not mentioned in the man page, you should close the file
descriptor you are _not_ using on your end of the pipe (i.e., if you are the
parent, close pipefd[1]; if you're the child, close pipefd[0].)  If you change
your code from

 >      len = read(pipefd[0], &buf, 1);

to
	close(pipefd[1]);
        len = read(pipefd[0], &buf, 1);

it does work...
-- 
					William Kucharski

ARPA: kucharsk at uts.amdahl.com
UUCP: ...!{ames,decwrl,sun,uunet}!amdahl!kucharsk

Disclaimer:  The opinions expressed above are my own, and may not agree with
	     those of any other sentient being, not to mention those of my 
	     employer.  So there.