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From: swick@athena.mit.EDU (Ralph Swick)
Newsgroups: comp.windows.x
Subject: Re: XTERM and redirection.
Message-ID: <9103041732.AA20831@lyre.MIT.EDU>
Date: 4 Mar 91 17:32:46 GMT
References: <JC.91Mar4102239@raven.bu.edu>
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 28


    I need to do some redirection:
    ie I WANT to call it like this:

    $ xterm -name DEMO -title DEMO -e 'demo2 input/sentences_1 < input/numbers_1'

    but what I get from the xterm is:

	xterm: Can't execvp a.out input/sentences_1 < input/numbers_1

    Apparently the C code in the xterm can't handle the redirection.

The 'execvp' in the error message should perhaps have given a clue.
The C code in xterm doesn't do anything special at all; to get
shell command interpretations, try

xterm -name DEMO -title DEMO -e sh -c 'demo2 input/sentences_1 < input/numbers_1'

Note especially                 ^^^^^

Alternatively, you could re-write the demo2 script to parse its
arguments looking for the token "<" and use

xterm -name DEMO -title DEMO -e demo2 input/sentences_1 '<' input/numbers_1

Ugly.

The trick is to keep straight by whom and when the arguments are parsed.