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From: davidt@ttidca.UUCP (David Terlinden)
Newsgroups: net.lang.c
Subject: i/o redirection
Message-ID: <215@ttidca.UUCP>
Date: Tue, 16-Apr-85 10:17:12 EST
Article-I.D.: ttidca.215
Posted: Tue Apr 16 10:17:12 1985
Date-Received: Thu, 18-Apr-85 23:41:11 EST
Organization: TTI, Santa Monica, CA.
Lines: 6

gsc asks about buffering of stdout of execed processes.  I say that it's not
the fault of the OS but of the stdio library.  If the flag field in _iob[1]
says to buffer output (the default value), the first output function to stdout
will notice this and allocate a buffer.  Since _iob is initialized data of
the new process, anything you do before the exec has no effect.  Can anyone
suggest anything other than modifying "putchar()" or "_iob[]"?