January 2004 - Libraries

Subprocesses (was: [ANNOUNCE] shell-haskell 1.0.0)
by Simon Marlow 08 Jul '04

08 Jul '04

Libraries people, There are currently two ways to create and communicate with external processes: - System.Cmd.system (very basic, doesn't give you access to the process's output but you can use shell primitives to redirect its input/output). - Posix.runProcess (can specify Handles for the process's input/output, but it doesn't create pipes so you can't actually communicate with the subprocess using these Handles.). - POpen.popen (can specify an input String, and gives you lazy output Strings. No interactive communication is possible.) Ok, *three* ways. System.Cmd.system, Posix.runProcess, POpen.popen, and shell-haskell. Er. *Four* ways. David Sankel's shell-haskell creates pipes for stdin/stdout/stderr, and lets you communicate interactively with the sub-process via Handles. It could do with a way to specify the environment and working directory of the sub-process (ala POpen and runProcess), but apart from that it seems to be the most flexible of the four. It could be simplified slightly by using one Handle rather than two for stdin/stdout. We should think about what functionality we want to provide in the core libraries. My preference would be to go for a full version with three pipes (like shell-haskell) and perhaps one or two more specialised versions covering common cases (I don't know what these should be, though). What do people think? Cheers, Simon -----Original Message----- From: haskell-admin(a)haskell.org [mailto:haskell-admin@haskell.org] On Behalf Of David Sankel Sent: 06 May 2003 03:06 To: haskell(a)haskell.org Subject: [ANNOUNCE] shell-haskell 1.0.0 =================== shell-haskell 1.0.0 =================== shell-haskell provides utilities to communicate with other process's via Haskell code. This library can be used for something as simple as getting the output of another program or as complex as interacting with an interpreter. see http://www.electronconsulting.com/shell-haskell for details. David J. Sankel _______________________________________________ Haskell mailing list Haskell(a)haskell.org http://www.haskell.org/mailman/listinfo/haskell

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Re: Ejacu.late Like A P0RN Star!!! Dustin
by Elf 27 Jan '04

27 Jan '04

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by linda.martinson＠hp.com 27 Jan '04

27 Jan '04

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by les＠tbitds.com 27 Jan '04

27 Jan '04

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by tanigawa＠roland.co.jp 27 Jan '04

27 Jan '04

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Your message to Glasgow-haskell-bugs awaits moderator approval
by glasgow-haskell-bugs-bounces＠haskell.org 27 Jan '04

27 Jan '04

Your mail to 'Glasgow-haskell-bugs' with the subject hello Is being held until the list moderator can review it for approval. The reason it is being held: Post by non-member to a members-only list Either the message will get posted to the list, or you will receive notification of the moderator's decision. If you would like to cancel this posting, please visit the following URL: http://www.haskell.org/mailman/confirm/glasgow-haskell-bugs/48ee834205b0457…

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hello
by libraries＠haskell.org 27 Jan '04

27 Jan '04

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Returned mail
by Norton_AntiVirus_Gateways＠mos.com.np 27 Jan '04

27 Jan '04

--- The message cannot be delivered to the following address. --- adam(a)mos.com.np Mailbox unknown or not accepting mail. 550 5.1.1 <adam(a)mos.com.np>... User unknown

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Returned mail: see transcript for details
by Mail Delivery Subsystem 26 Jan '04

26 Jan '04

The original message was received at Mon, 26 Jan 2004 22:38:17 -0600 from wd02.cc.ndsu.NoDak.edu [134.129.113.202] ----- The following addresses had permanent fatal errors ----- <robert.sutton(a)ndsu.nodak.edu> (reason: 550 5.1.1 <robert.sutton(a)ndsu.nodak.edu>... User unknown) ----- Transcript of session follows ----- ... while talking to vaccine2.nodak.edu.: >>> RCPT To:<robert.sutton(a)ndsu.nodak.edu> <<< 550 5.1.1 <robert.sutton(a)ndsu.nodak.edu>... User unknown 550 5.1.1 <robert.sutton(a)ndsu.nodak.edu>... User unknown

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Returned mail: see transcript for details
by Mail Delivery Subsystem 26 Jan '04

26 Jan '04

The original message was received at Mon, 26 Jan 2004 21:56:06 -0600 from ch30.cc.ndsu.NoDak.edu [134.129.90.50] ----- The following addresses had permanent fatal errors ----- <sam(a)ndsu.nodak.edu> (reason: 550 5.1.1 <sam(a)ndsu.nodak.edu>... User unknown) ----- Transcript of session follows ----- ... while talking to vaccine1.nodak.edu.: >>> RCPT To:<sam(a)ndsu.nodak.edu> <<< 550 5.1.1 <sam(a)ndsu.nodak.edu>... User unknown 550 5.1.1 <sam(a)ndsu.nodak.edu>... User unknown

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