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Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!genrad!john
From: john@genrad.UUCP (John Nelson)
Newsgroups: net.lang.c
Subject: Re: i/o redirection
Message-ID: <764@genrad.UUCP>
Date: Wed, 17-Apr-85 16:32:50 EST
Article-I.D.: genrad.764
Posted: Wed Apr 17 16:32:50 1985
Date-Received: Thu, 18-Apr-85 23:44:05 EST
References: <215@ttidca.UUCP>
Reply-To: john@genrad.UUCP (John Nelson)
Organization: GenRad, Bolton MA
Lines: 11

In article <215@ttidca.UUCP> davidt@ttidca.UUCP (David Terlinden) writes:
>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[]"?

SURE!  Why not write a program to poke around in the executable file, and
reset that flag in _iob[1].  This solves the problem of having only a binary.
Unfortunately, this won't work if the executable has been "stripped".