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Re: Problem with "~" in Unix FINDFILE, still? [message #2322 is a reply to message #2314]

Thu, 09 June 1994 06:04

thompson
Messages: 584
Registered: August 1991

Senior Member

pendleton@ossenu.astro.nwu.edu (Jim Pendleton) writes:

> Could someone verify the following Unix IDL "bug" for me in a more recent
> version of IDL than 3.0.0?

> The problem I am seeing is that the FINDFILE function doesn't properly
> interpret a "~" as a symbol for the home directory.

> For instance

> IDL> A = FINDFILE("-F ~ | grep /")

> results in zero entries for me in both Ultrix and SunOS versions of IDL 3.0.0.

> However,

> IDL> SPAWN, "ls -F ~ | grep /", OUTPUT
> IDL> PRINT, OUTPUT

> produces output as I would expect. Note that the use of a "." for current
> directory rather than a "~" does work properly.

I'm not sure that one can describe it as a *bug* exactly. :^) The ~ symbol is
a function of the C shell (and some others such as tcsh and ksh). However, the
Bourne shell does not appear to recognize ~ as $HOME. Probably, IDL spawns out
to the Bourne shell to find files.

These days, though, most people use some other shell than the Bourne shell. It
would be nice if IDL interpreted ~ as they expect it to. I never thought to
try something as fancy as Jim Pendleton did, but I would expect to be able to
say something like

IDL> A = FINDFILE('~/*.dat')

Bill Thompson

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[Message index]

		Re: Problem with "~" in Unix FINDFILE, still? By: dnguyen on Thu, 09 June 1994 08:36
		Re: Problem with "~" in Unix FINDFILE, still? By: knipp on Thu, 09 June 1994 03:42
		Re: Problem with "~" in Unix FINDFILE, still? By: robijn on Thu, 09 June 1994 06:54
		Re: Problem with "~" in Unix FINDFILE, still? By: thompson on Thu, 09 June 1994 06:04
		Re: Problem with "~" in Unix FINDFILE, still? By: knipp on Thu, 09 June 1994 03:18

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