From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: Victor Porton Newsgroups: comp.lang.ada Subject: Re: Execute an OS command and capture output Date: Mon, 13 Nov 2017 21:07:49 +0200 Organization: Aioe.org NNTP Server Message-ID: References: NNTP-Posting-Host: dDnBrl5M0tnZkgU+KABVxA.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7Bit X-Complaints-To: abuse@aioe.org User-Agent: KNode/4.14.10 X-Notice: Filtered by postfilter v. 0.8.2 Xref: feeder.eternal-september.org comp.lang.ada:48859 Date: 2017-11-13T21:07:49+02:00 List-Id: Dmitry A. Kazakov wrote: > On 2017-11-13 17:38, Victor Porton wrote: >> I need a (preferably portable, but only Linux would be well) way to >> execute an OS command with some input in stdin which I provide and >> capture the output from stdout. > > It is a vague question because there are numerous methods of how the > input, output and error pipes are handled. E.g. by 0, 1, 2 tasks. I need synchronous processing of input/output pipes. That is I need just provide a String variable for the input and receive a String value with the output after the command ends. However, I will most probably need also to terminate the spawned command after a timeout (not allow it to run more than 20 secs, for example). But this "timeout" functionality may be added later. > Anyway see: > > 1. GNAT's System.OS_Lib.Spawn, System.OS_Lib.Non_Blocking_Spawn. > > 2. A more comfortable method would be to use GTK bindings (GLib actually): > > http://www.dmitry-kazakov.de/ada/gtkada_contributions.htm#10 > -- Victor Porton - http://portonvictor.org