Date: Tue, 20 Apr 2021 12:17:32 -0400 From: Paul Procacci <pprocacci@gmail.com> To: byrnejb@harte-lyne.ca Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: socat / ghostscript questions Message-ID: <CAFbbPugodkPJm1mcGDuVO1kMVrhnWbwazA4vxrQnE0eijeLO3A@mail.gmail.com> In-Reply-To: <a57616c8b3cb377786621d3410355793.squirrel@webmail.harte-lyne.ca> References: <a57616c8b3cb377786621d3410355793.squirrel@webmail.harte-lyne.ca>
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The hang is most likely because an EOF doesn't get trasmitted over the wire. Adding a timeout I believe should fix the problem. nc -w 1 [addr] [port] < filename.txt On Tue, Apr 20, 2021 at 11:51 AM James B. Byrne via freebsd-questions < freebsd-questions@freebsd.org> wrote: > I am trying to produce pdf files using socat and ghostscript. I have this > command for socat: > > socat TCP4-LISTEN:9100,bind=192.168.216.41,fork,reuseaddr SYSTEM:'gs > -dQUIET > -dNOPROMPT -dBATCH -sDEVICE=pdfwrite -sOutputFile=/tmp/\"$(date > -Iseconds)\".pdf -' > > > Which I try to send a text file to using cat and nc: > > cat sshpipe3.txt | nc 192.168.216.41 9100 > > > What happens is that the cat/nc pipe hangs. This is probably an artifact > of > how nc works but I need to check that is so. When I terminate nc with > <ctrl>-c > the socat gs instance reports an error: > > GPL Ghostscript 9.52: Unrecoverable error, exit code 1 > 2021/04/20 11:32:51 socat[67296] E write(6, 0x800adf000, 128): Broken pipe > > This produces an empty file named like /tmp/2021-04-20T11:13:20-04:00.pdf. > > I am no doubt missing the obvious here so I have a few naive questions: > > 1. Is it possible to terminate the sending process without causing GS to > issue > an error? > > 2. Would printing from another host to that socat instance result in the > same > broken pipe error? > > 3. Why are the files that gs creates empty? > > 4. How do I send a text file to the socat instance so that it is converted > to a > pdf document? > > -- > *** e-Mail is NOT a SECURE channel *** > Do NOT transmit sensitive data via e-Mail > Unencrypted messages have no legal claim to privacy > Do NOT open attachments nor follow links sent by e-Mail > > James B. Byrne mailto:ByrneJB@Harte-Lyne.ca > Harte & Lyne Limited http://www.harte-lyne.ca > 9 Brockley Drive vox: +1 905 561 1241 > Hamilton, Ontario fax: +1 905 561 0757 > Canada L8E 3C3 > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" > -- __________________ :(){ :|:& };:
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