* Read output of external command @ 2013-04-14 10:06 Marco Patzer 2013-04-14 11:27 ` Hans Hagen 0 siblings, 1 reply; 2+ messages in thread From: Marco Patzer @ 2013-04-14 10:06 UTC (permalink / raw) To: mailing list for ConTeXt users [-- Attachment #1.1: Type: text/plain, Size: 542 bytes --] Hi, I need to read the standard output of an external command. This is what I came up with: \starttext \startluacode f = io.popen "ls" context(f:read "*a") \stopluacode \stoptext It works with luajittex, plain lua5.1 and lua5.2, but it fails with a current luatex: ! LuaTeX error [string "\directlua "]:3: attempt to index global 'f' (a nil value) stack traceback: [string "\directlua "]:3: in main chunk. Why does this fail in luatex but works in lua5.2 ? What is the correct way to obtain the output of a command? Marco [-- Attachment #1.2: Digital signature --] [-- Type: application/pgp-signature, Size: 490 bytes --] [-- Attachment #2: Type: text/plain, Size: 485 bytes --] ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Read output of external command 2013-04-14 10:06 Read output of external command Marco Patzer @ 2013-04-14 11:27 ` Hans Hagen 0 siblings, 0 replies; 2+ messages in thread From: Hans Hagen @ 2013-04-14 11:27 UTC (permalink / raw) To: mailing list for ConTeXt users On 4/14/2013 12:06 PM, Marco Patzer wrote: > Hi, > > I need to read the standard output of an external command. This is > what I came up with: > > \starttext > \startluacode > f = io.popen "ls" > context(f:read "*a") > \stopluacode > \stoptext context(os.resultof("ls")) > It works with luajittex, plain lua5.1 and lua5.2, but it fails with > a current luatex: > > ! LuaTeX error [string "\directlua "]:3: attempt to index global 'f' (a nil value) > stack traceback: > [string "\directlua "]:3: in main chunk. > > Why does this fail in luatex but works in lua5.2 ? What is the > correct way to obtain the output of a command? > > > Marco > > > > ___________________________________________________________________________________ > If your question is of interest to others as well, please add an entry to the Wiki! > > maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context > webpage : http://www.pragma-ade.nl / http://tex.aanhet.net > archive : http://foundry.supelec.fr/projects/contextrev/ > wiki : http://contextgarden.net > ___________________________________________________________________________________ > -- ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2013-04-14 11:27 UTC | newest] Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-04-14 10:06 Read output of external command Marco Patzer 2013-04-14 11:27 ` Hans Hagen
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