Conversation with #inferno at Mon Mar 28 19:11:58 2011 on powerman-asdf@irc.freenode.net (irc)
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(21:50:22) mjl-: does anyone know if there is a reliable way for an emu (any host os) to find the homedir in the host os of the user that started emu?
(21:50:41) mjl-: you can find the host os in a variable set by emu
(21:51:08) mjl-: but you can't access host os environment vars afaik, so can't query $HOME or $home or whatever it is on macosx or nt
(22:10:39) anth_x: sounds like a reasonable extension to #e, analogous to plan9's #ec.
(22:10:42) anth_x: (roughly)
(22:11:14) anth_x: of course, since you said *any* host os, yes, this is easy when hosted on plan9. :-)
(22:11:28) anth_x: (read /n/local/env/home)
(22:11:40) mjl-: hehe :)
(22:11:54) mjl-: i want the scheme to work on any host os ;)
(22:11:54) anth_x: most things are easier when running on plan 9. :-)
(22:11:59) mjl-: all supported host os'es
(22:12:06) mjl-: it's almost cheating ;)
(22:12:07) anth_x: oh, the other kind of "any".
(22:12:29) anth_x: i don't believe such a thing exists. it does seem like a reasonable extension to #e.
(22:13:07) mjl-: yeah
(22:13:11) mjl-: perhaps i should give it a try
(22:13:41) mjl-: nah, i don't need it that badly, better just put it on the todo list ;)
(22:28:45) powerman: mjl-: i'm using `{os sh -c 'echo $HOME' </dev/null}
(22:29:31) powerman: of course, that won't work on _any_ host os, but _any_ host os has similar way to get it
(22:31:04) powerman: and you've /env/emuhost to find type of host os
(22:33:04) powerman: one more option - use host os wrapper script to run emu, which will run it always in user's home dir - then just read /env/emuwdir
(22:35:00) mjl-: powerman-asdf: good point!
(22:35:04) mjl-: i'll try using os(1)
(22:35:12) mjl-: i don't want to use a wrapper
(22:36:36) mjl-: powerman-asdf: why do you have the "</dev/null" in there?
(22:37:31) powerman: 'cos it doesn't work reliable without it
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(22:38:19) powerman: that was long time ago, I don't remember exact details, but it was something related to how os(1) and emu itself share stdin/out/err or something like that
(22:38:39) mjl-: ok, i'll keep it with /dev/null then, thanks ☺
(22:38:40) powerman: chances are it was discussed in maillist or issue tracker that time
(22:38:48) mjl-: now to find the right incantation for Nt
(22:41:13) powerman: my guess is os(1) when executed try to read from emu's stdin - because it have to provide it to executed command
(22:41:45) powerman: and it (os(1)) have no idea is that command really need to read stdin or not
(22:42:15) powerman: this maybe even have something to stdio buffering, and not os(1) implementation itself
(22:42:42) powerman: as result, part of emu's stdin is lost
(22:43:29) powerman: again, I don't remember exact details, but it was something like that, I think
(22:44:13) powerman: actually, os(1) man page recommends redirecting from /dev/null!
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(22:57:27) goozbach: I'm having issues trying to compile inferno on Fedora 14 x86_64.
(22:57:42) goozbach: I've googled the error I'm getting but without any results
(22:58:12) goozbach: /usr/bin/ld: os.o: undefined reference to symbol 'sem_init@@GLIBC_2.1'
(22:58:14) goozbach: /usr/bin/ld: note: 'sem_init@@GLIBC_2.1' is defined in DSO /lib/libpthread.so.0 so try adding it to the linker command line
(22:58:16) goozbach: /lib/libpthread.so.0: could not read symbols: Invalid operation
(22:58:19) mjl-: ah
(22:58:20) goozbach: any ideas?
(22:58:23) mjl-: yes
(22:58:26) mjl-: sounds familiar
(22:58:49) mjl-: you may have to add -lpthread to emu/Linux/mkfile
(22:58:56) mjl-: on the line that has the other libs, -lrt
(22:59:15) mjl-: http://code.google.com/p/inferno-os/issues/detail?id=247
(23:00:58) goozbach: B E A utiful thanks mjl- 
(23:01:01) goozbach: that did it
(23:01:28) goozbach: I'm gonna add my error message to that issue on googlecode so that the next guy who googles the error will find the answer
(23:04:36) goozbach: nice!  I knew it was something as simple as adding a library somewhere.
(23:04:47) goozbach: thanks again
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(02:17:45) mjl-: goozbach: good you posted it, might get fixed sooner now too ☺
(02:18:34) mjl-: powerman-asdf & anth_x: a patch to add $emuhome to each port:  http://www.ueber.net/who/mjl/tmp/emuhome.diff
(02:18:41) goozbach: I'm just getting into the inferno/plan9 stuff in earnest
(02:18:59) goozbach: tis what we use excluseivly at $DAYJOB
(02:19:02) mjl-: only tested for Nt and OpenBSD.  all unixen are the same.  mac os x or plan 9 could do something funny
(02:19:18) mjl-: you use inferno & plan9 at your dayjob? :)
(02:25:13) mjl-: anyway, i'm away for the day o/~~
(02:26:05) goozbach: mjl-: I work with Eric Quanstrom and Brian Stuart
(02:26:15) goozbach: so yeah, we're big into plan9
(02:26:40) goozbach: oh and mennis
(02:26:52) goozbach: who aparently has been in this channel once or twice
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(04:54:51) anth_x: yup, we're familiar with those folks. didn't recognize you as a coraider. are you newish?
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