install feature-beg: grok - meaning stdin

[Edward Avis]

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I think it would be useful for install to understand a source filename
of - as 'read from stdin'.  For example, to install a gzipped manual
page:

% gzip <whatever.1 | install -D - /usr/share/man/man1

Certainly this would be more common than wanting to install an actual
file called -.

(Looking at install.c, it's not entirely clear where to make a change
for this.  I don't think it should go in copy.c because reading from
stdin is probably less appropriate for cp, and definitely not meaningful
for mv.  Perhaps the answer is to add a new flag to a struct cp_options,
'If nonzero, understand the filename - to mean stdin'.  If you give me a
clue, I could submit a patch for this feature myself.)

- -- 
Ed Avis <address@hidden>
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