[9fans] C question on struct Biobuf in bio.h
Hello,
in bio.h there is a
struct Biobuf
{
Biobufhdr;
uchar b[Bungetsize+Bsize];
};
where Biobufhdr is declared as
typedef struct Biobufhdr Biobufhdr;
To make it compile with gcc under UNIX I changed the struct to
struct Biobuf
{
Biobufhdr Biobufhdr;
uchar b[Bungetsize+Bsize];
};
but is that what is meant by the original description above?
Carsten
Re: [9fans] C question on struct Biobuf in bio.h
hi,
no, it is an anonym field. and it is used in a way that is not part
of ansi c. there is an extension in newer versions of gcc which
supports it, but if you wan't to port plan 9 c to unix you can use the
libs from plan9port. that's far more easier.
bence
2014-10-07 17:24 GMT+02:00 Carsten Kunze carsten.ku...@arcor.de:
Hello,
in bio.h there is a
struct Biobuf
{
Biobufhdr;
uchar b[Bungetsize+Bsize];
};
where Biobufhdr is declared as
typedef struct Biobufhdr Biobufhdr;
To make it compile with gcc under UNIX I changed the struct to
struct Biobuf
{
Biobufhdr Biobufhdr;
uchar b[Bungetsize+Bsize];
};
but is that what is meant by the original description above?
Carsten
Re: [9fans] C question on struct Biobuf in bio.h
in bio.h there is a
struct Biobuf
{
Biobufhdr;
uchar b[Bungetsize+Bsize];
};
where Biobufhdr is declared as
typedef struct Biobufhdr Biobufhdr;
This is an unnamed structure. Recent versions of GCC
should be able to handle them when setting the
-fplan9-extension flag.
Otherwise, your change is fine, but hdr would probably be
a better name than Biobufhdr. Also, don't forget to update
your code to use b-hdr.fid instead of b-fid, and so on.
--
David du Colombier
Re: [9fans] C question on struct Biobuf in bio.h
Otherwise, your change is fine, but hdr would probably be a better name than Biobufhdr. Also, don't forget to update your code to use b-hdr.fid instead of b-fid, and so on. Thanks for all answers! (They also helped to find a short documentation in /sys/doc/compiler) Carsten
Re: [9fans] Clean desktop on Raspberry Pi using Plan 9.
Thanks Skip!
I get the idea but how do I save the changes in the file? Sorry for
being such a NEWBIE.
Kind Regards,
Mats
-Ursprungligt Meddelande-
From: Skip Tavakkolian [skip.tavakkol...@gmail.com]
Sent: 6/10/2014 10:51:42 PM
To: 9fans@9fans.net
Subject: Re: [9fans] Clean desktop on Raspberry Pi using Plan 9.
from the shell window take a look at bin/rc/riostart (i.e.
$home/bin/rc/riostart). remove the startup windows you don't want (like
first.window, etc)
term% cat bin/rc/riostart
#!/bin/rc
scr=(`{cat /dev/draw/new [2]/dev/null || status=''})
wid=$scr(11)
ht=$scr(12)
window 0,0,161,117 stats -lmisce
window 161,0,560,117 faces -i
if(~ `{screensize} small)
dump=acme.dump.small
if not
dump=acme.dump
a=`{echo $wid-35 | hoc }
window 60,90,$a,$ht acme -l lib/$dump
window 20,140,610,450 /usr/glenda/lib/first.window
term%
On Mon, Oct 6, 2014 at 1:19 PM, Mats Olsson m...@spray.se
mailto:m...@spray.se wrote:
Hi guys!
How can I get a clean desktop at bootup on the Raspberry Pi
using Plan 9? No tutorials starting etc. Would highly appreciate to know
how to know how to configure the Raspberry Pi to start clean. Thanks
beforehand!
Kind Greetings,
Mats
Re: [9fans] Clean desktop on Raspberry Pi using Plan 9.
use acme to open/save it. 'man acme' or search for youtube videos on how to
navigate in acme.
On Tue, Oct 7, 2014 at 9:42 AM, Mats Olsson m...@spray.se wrote:
Thanks Skip!
I get the idea but how do I save the changes in the file? Sorry for being
such a NEWBIE.
Kind Regards,
Mats
-Ursprungligt Meddelande-
*From: Skip Tavakkolian [skip.tavakkol...@gmail.com
skip.tavakkol...@gmail.com]*
Sent: 6/10/2014 10:51:42 PM
To: 9fans@9fans.net
Subject: Re: [9fans] Clean desktop on Raspberry Pi using Plan 9.
from the shell window take a look at bin/rc/riostart (i.e.
$home/bin/rc/riostart). remove the startup windows you don't want (like
first.window, etc)
term% cat bin/rc/riostart
#!/bin/rc
scr=(`{cat /dev/draw/new [2]/dev/null || status=''})
wid=$scr(11)
ht=$scr(12)
window 0,0,161,117 stats -lmisce
window 161,0,560,117 faces -i
if(~ `{screensize} small)
dump=acme.dump.small
if not
dump=acme.dump
a=`{echo $wid-35 | hoc }
window 60,90,$a,$ht acme -l lib/$dump
window 20,140,610,450 /usr/glenda/lib/first.window
term%
On Mon, Oct 6, 2014 at 1:19 PM, Mats Olsson m...@spray.se wrote:
Hi guys!
How can I get a clean desktop at bootup on the Raspberry Pi using Plan 9?
No tutorials starting etc. Would highly appreciate to know how to know how
to configure the Raspberry Pi to start clean. Thanks beforehand!
Kind Greetings,
Mats
Re: [9fans] C question on struct Biobuf in bio.h
I'm using gcc to compile plan9 code from some time (4.7/4.8) and that option are masking real behaviour. Do not warns or put out an error about anonymous structs, but you will have a conflict if to structs in the same source are including a, for example, Lock; element, and ld could not assign right the values if declarations are not specified ansi style (variable initialization it's made by ld, not by the compiler): you will get some dragons in some cases. Look at LP49 source code and you will see that authors used your second way. Álvaro Jurado Cuevas colmenar.biz.tm 2014-10-07 17:58 GMT+02:00 Carsten Kunze carsten.ku...@arcor.de: Otherwise, your change is fine, but hdr would probably be a better name than Biobufhdr. Also, don't forget to update your code to use b-hdr.fid instead of b-fid, and so on. Thanks for all answers! (They also helped to find a short documentation in /sys/doc/compiler) Carsten
Re: [9fans] Clean desktop on Raspberry Pi using Plan 9.
Thanka again for your help! Now I got it. Looked for the file in Acme
and edited the file and pressed the middle button on Put.
Kind Greetings,
Mats
-Ursprungligt Meddelande-
From: Skip Tavakkolian [skip.tavakkol...@gmail.com]
Sent: 6/10/2014 10:51:42 PM
To: 9fans@9fans.net
Subject: Re: [9fans] Clean desktop on Raspberry Pi using Plan 9.
from the shell window take a look at bin/rc/riostart (i.e.
$home/bin/rc/riostart). remove the startup windows you don't want (like
first.window, etc)
term% cat bin/rc/riostart
#!/bin/rc
scr=(`{cat /dev/draw/new [2]/dev/null || status=''})
wid=$scr(11)
ht=$scr(12)
window 0,0,161,117 stats -lmisce
window 161,0,560,117 faces -i
if(~ `{screensize} small)
dump=acme.dump.small
if not
dump=acme.dump
a=`{echo $wid-35 | hoc }
window 60,90,$a,$ht acme -l lib/$dump
window 20,140,610,450 /usr/glenda/lib/first.window
term%
On Mon, Oct 6, 2014 at 1:19 PM, Mats Olsson m...@spray.se
mailto:m...@spray.se wrote:
Hi guys!
How can I get a clean desktop at bootup on the Raspberry Pi
using Plan 9? No tutorials starting etc. Would highly appreciate to know
how to know how to configure the Raspberry Pi to start clean. Thanks
beforehand!
Kind Greetings,
Mats
Re: [9fans] Clean desktop on Raspberry Pi using Plan 9.
The startup file is there exactly to teach you about these things, you should read it. -- Aram Hăvărneanu
[9fans] [OFF-TOPIC] For most programmers, it is foolish currently develop in machine code, hexadecimal and assembly?
It is written in the introduction C - A programming language Ansi standard written by Brian Kernighan and Dennis Ritchie: For most programmers, the most important change is a new syntax for declaring and defining functions. For most programmers, it is foolish currently develop in machine code, hexadecimal and assembly? There are different opinions on this?
Re: [9fans] [OFF-TOPIC] For most programmers, it is foolish currently develop in machine code, hexadecimal and assembly?
For most programmers, it is foolish currently develop in machine code, hexadecimal and assembly? you forgot octal. i think this is more a function of the (a) problem, (b) machine than something one can make sweeping generalizations about. but in general, yes, programming in machine code (octal or hex or whatever) doesn't make much sense, but i have done it rather than writing an assembler for a small project. it turns out that this is easier with some machines than others. and that currently popular machines tend to be on the difficult side. programming in assembly makes a lot of sense if the problem cannot be expressed in another language, such as accessing MSRs. bootstrapping code is frequently in assembly. - erik
