This is the mail archive of the
cygwin
mailing list for the Cygwin project.
RE: Bash Process Substitution
- From: Lev S Bishop <lev dot bishop at yale dot edu>
- To: cygwin at cygwin dot com
- Date: Thu, 14 Apr 2005 08:04:59 -0400 (EDT)
- Subject: RE: Bash Process Substitution
I tried building bash from the source package, and then it uses either
/dev/fd (if I have that as a symlink) or /proc/self/fd (if I don't),
rather than the fifo that the binary package uses. So perhaps whoever
built the binary package didn't have /proc/self/fd for whatever reason?
With my built bash.exe, process substitution seems to work for input:
$ echo <(ls)
/proc/self/fd/63
$ cat <(echo hi)
hi
But not for output:
$ tar -cf >(cat) syntax.c
tar: /proc/self/fd/63: Cannot open: Permission denied
tar: Error is not recoverable: exiting now
I'm not sure how there can be a permissions problem or what to do about
it if there really is one, given that as I understand it
the /proc/self/fd/63 is effectively a symlink to one end of something
returned from pipe(2).
Lev
--
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Problem reports: http://cygwin.com/problems.html
Documentation: http://cygwin.com/docs.html
FAQ: http://cygwin.com/faq/