[gambit-list] How to do pipe?
luuxuanlam at gmail.com
Tue Jun 16 14:48:12 EDT 2009
On 06/16/2009 11:03 AM, Marc Feeley wrote:
> On 14-Jun-09, at 1:09 PM, Marc Feeley wrote:
>> On 14-Jun-09, at 10:59 AM, Lam Luu wrote:
>>> Hello all,
>>> Is there anyway to open a pipe to a new process (On Unix)? You know,
>>> like popen in C. I have searched through the manual, but could not
>>> anything there.
>> Look for "open-process" in the manual. If your Gambit is properly
>> installed, just do (help open-process).
>> Here is a simple example on Unix:
>>> (read-line (open-process "date"))
>> "Sun Jun 14 13:07:57 EDT 2009"
> Although this works it is not usable in general because the process
> may not be reclaimed properly.
> The latest patch to Gambit solves this problem by introducing new
> procedures: call-with-input-proces, with-input-from-process, etc.
> These procedures wait for the process to terminate (by calling process
> status). The patch also fixes a bug in process-status. So the
> example can be rewritten:
> > (with-input-from-process "date" read-line)
> "Tue Jun 16 12:02:21 EDT 2009"
So, for now, what can I do?
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