[9fans] pjpeg in /sys/lib/memetype
Hello 9fans, It is curious for me that ".jpg" has two lines in /sys/lib/mimetype. term% grep jpeg /sys/lib/mimetype .jfif image jpeg- y .jfif-tbnl image jpeg- y .jpeimage jpeg- y .jpeg image jpeg- y .jpgimage jpeg- y .jpgimage pjpeg - y term% The file is currently consulted by only two applications: mail and httpd. I have thought that the file provides conventional way to determine mime type from file suffix. If so, what is the mime time for "foo.jpg"? Kenji Arisawa
Re: [9fans] dns
Hello cinap, broken dns triggers Fauth problem, so I have rebooted. I will get snapshot at next crash. Kenji Arisawa On 2012/08/25, at 19:54, cinap_len...@gmx.de wrote: > always make a process snapshot as the kernel might discard > your broken process once it runs low on memory so you have > time to debug: > > snap 41356 >/tmp/dns.snap > > char *domain strings alloc header seems to have been corrupted > (or just freed by accident?). > > the string just gets allocated and freed in mydnsquery() so its > unlikely a bug there. someone else has corrupted its alloc header? > > it looks more like corruption as we dont hand this pointer out to > someone else but netmkaddr(). > > look at the raw data, often one can get a clue by what it got > overridden with and try to figure out what the previous block > before our block that got corrupted was. the pool allocator keeps > the callerpc's of who allocated the block so you can use that > to figure out what it is, or look at the contents. > > // dump the memory arround our corrupted block > dump(0x497f8 - 0x10, 0x100, "X") > > maybe our block didnt got overridden but really freed with > a call to free but with the wrong pointer? check the alloc > magic! > > // check the contents, should be an ip address string > dump(0x49800, 1, "s") > > run acid with -lpool -lleak and run blockdump() if its > corrupted block, it might just stop at the block before > our one and will print the allocpc's and give some > diagnostics. > > i can try this if you provide process snapshot file. > > -- > cinap >
Re: [9fans] dns
Hello cinap, I got a one. I hope this a helpful. ar% cat broken/1345779846.41356 name=dns /proc/41356/text:386 plan 9 executable /sys/lib/acid/port /sys/lib/acid/386 acid: abort()+0x0 /sys/src/libc/9sys/abort.c:6 ppanic(p=0x3975c,fmt=0x394ec)+0x146 /sys/src/libc/port/malloc.c:166 pv=0x3e820 msg=0x3f804 v=0xdfffc800 n=0x2c D2B(p=0x3975c,v=0x497f8)+0x5a /sys/src/libc/port/pool.c:968 a=0x497f0 poolfreel(v=0x497f8,p=0x3975c)+0x20 /sys/src/libc/port/pool.c:1192 ab=0x3e820 poolfree(p=0x3975c,v=0x497f8)+0x41 /sys/src/libc/port/pool.c:1327 free(v=0x49800)+0x23 /sys/src/libc/port/malloc.c:250 mydnsquery(qp=0x88cf0,udppkt=0xc76f0,len=0x2a,medium=0x1)+0x185 /sys/src/cmd/ndb/dnresolve.c:1032 rv=0xc domain=0x49800 net=0x74656e2f conndir=0x74656e2f nci=0x52b59 belen=0x6e2f000f xmitquery(qp=0x88cf0,depth=0x1,medium=0x1,inns=0x1,obuf=0xc76f0,len=0x2a)+0x227 /sys/src/cmd/ndb/dnresolve.c:1114 p=0xc7950 j=0x1 n=0x0 buf=0x1b59c4c3 tcpquery(qp=0x88cf0,waitms=0x63f,obuf=0xc76f0,ibuf=0xa7530,depth=0x1,inns=0x1,len=0x2a,req=0x1d85,mp=0xdfffc9b4)+0xea /sys/src/cmd/ndb/dnresolve.c:1353 rv=0x0 endms=0x56ba1ef1 queryns(qp=0x88cf0,obuf=0xc76f0,depth=0x1,inns=0x1,waitms=0x63f,ibuf=0xa7530)+0x4d3 /sys/src/cmd/ndb/dnresolve.c:1428 req=0xa9961d85 len=0x2a dest=0xc7950 p=0xc7c30 ndest=0x1 endms=0x56ba1dcc replywaits=0x0 buf=0x9dfa996 m=0x1d85 srcip=0xdfffca18 rv=0x9dfa996 udpquery(mntpt=0x3f0e0,qp=0x88cf0,patient=0x0,depth=0x1,inns=0x1)+0x1b7 /sys/src/cmd/ndb/dnresolve.c:1578 ibuf=0xa7530 obuf=0xc76f0 fd=0xb msg=0x6faa pcntprob=0x3c reqtm=0x1f40 wait=0x63f rv=0x87710 netquery(depth=0x1,qp=0x88cf0)+0x2b5 /sys/src/cmd/ndb/dnresolve.c:1660 rv=0x0 dp=0x6d460 qlp=0x6d4fc lock=0x1 buf=0x3975c triedin=0x0 inname=0x1 netqueryns(qp=0x88cf0,nsrp=0x876b0,depth=0x1)+0x1e /sys/src/cmd/ndb/dnresolve.c:338 rv=0x88ce8 issuequery(class=0x1,qp=0x88cf0,depth=0x0,name=0xdfffce13,recurse=0x0)+0x50 /sys/src/cmd/ndb/dnresolve.c:359 nsrp=0x876b0 cp=0x88cf0 dbnsrp=0x8558 rp=0x0 dnresolve1(name=0xdfffce13,type=0xf,class=0x1,req=0xdfffcdd8,depth=0x0,recurse=0x0)+0x25c /sys/src/cmd/ndb/dnresolve.c:505 dp=0x6d460 rp=0x0 qp=0x88cf0 dnresolve(status=0xdfffcce0,depth=0x0,rooted=0x0,name=0xdfffce13,class=0x1,type=0xf,req=0xdfffcdd8,cn=0x0,recurse=0x0)+0xa8 /sys/src/cmd/ndb/dnresolve.c:198 procname=0x9cb50 rp=0x0 drp=0x71a98 nrp=0x9cb40 nname=0x48 dp=0xdfffcca8 loops=0x9cb90 lookupqueryold(p=0xdfffce13,mf=0xbac50,req=0xdfffcdd8,rooted=0x0,job=0xba810,errbuf=0xdfffcd0c,wantsav=0x0)+0x70 /sys/src/cmd/ndb/dns.c:864 status=0x0 rp=0x9cb48 rwrite(job=0xba810,mf=0xbac50,req=0xdfffcdd8)+0x2be /sys/src/cmd/ndb/dns.c:838 err=0x0 cnt=0x1b send=0x0 errbuf=0x0 atype=0xdfffce2c io()+0x39e /sys/src/cmd/ndb/dns.c:532 req=0x1 mdata=0x32 n=0x32 job=0xba810 mf=0xbac50 main(argv=0xdfffefb0,argc=0x0)+0x32c /sys/src/cmd/ndb/dns.c:267 ext=0x0 _argc=0x72 _args=0xdfffefc7 servefile=0x642f7323 dir=0x0 kid=0x0 _main+0x31 /sys/src/libc/386/main9.s:16 acid: echo kill > /proc/41356/ctl ar% Kenji Arisawa On 2012/08/21, at 20:27, cinap_len...@gmx.de wrote: > nothing wrong with diffing the changes and see if theres a clue, but > to solve this one really needs to find the underlying cause no matter > what. changes can just hide bugs or make them more or less likely to > appear. can anyone provide at least a stacktrace or process snapshot > of the crashed dns processes? from that you try to build a theory of > what might be going wrong by thinking really really hard... (the > thinking should be directly proportional to the time it takes to > reproduce the bug) and then you work on how to prove that theory. > just changing stuff without knowing what exactly was the problem with > the old code is sometimes tempting, but wrong and dangerous. > > -- > cinap >
Re: [9fans] dns
Hello,
On 2012/08/22, at 19:32, cinap_len...@gmx.de wrote:
> the result check of that serveraddr() call should really be:
>
> if (j < 0 || j > Maxdest) {
> dnslog("serveraddrs() result %d out of range", j);
> abort();
> }
> qp->curdest = &qp->dest[j];
what happens if j == Maxdest ? note that j is index.
I rather notice the foolowing code.
/* use any addresses that we found */
for(trp = arp; trp && nd < Maxdest; trp = trp->next){
cur = &qp->dest[nd];
parseip(cur->a, trp->ip->name);
/*
* straddling servers can reject all nameservers if they are all
* inside, so be sure to list at least one outside ns at
* the end of the ns list in /lib/ndb for `dom='.
*/
if (ipisbm(cur->a) ||
cfg.straddle && !insideaddr(qp->dp->name) &&
insidens(cur->a))
continue;
cur->nx = 0;
cur->s = trp->owner;
cur->code = Rtimeout;
nd++;
}
lock(&dnlock);
rrfreelist(arp);
unlock(&dnlock);
return nd;
returned value may be Maxdest.
This code is in function serveraddrs(), and the function must return index.
(must not be Maxdest)
Kenji Arisawa
Re: [9fans] dns
Hello,
I suspect the problem is in:
--rwxrwxr-x M 21231 glenda sys 311768 Jul 14 11:46 dns
I don't have 2012/0501 version. I am lazy sorry.
My current dns is
--rwxrwxr-x M 131526 sys sys 310819 Apr 13 12:46 /386/bin/ndb/dns
That works 12 days since last boot without any troubles.
ar% ps
none 990:00 0:00 184K Open listen
none1000:00 0:00 184K Open listen
bootes 5400:00 0:01 240K Awaitpatrol
none 2411970:00 0:00 240K Awaittcp110
arisawa 2412020:00 0:00 360K Preadpop3
where patrol is a program that reboot cpu server if it detects a process that
stops
with Fauth status. the contents is
ar% cat /usr/bootes/bin/rc/patrol
#!/bin/rc
rfork e
while(sleep 60){
a=`{ps|grep Fauth|wc}
if(! ~ $a(1) 0){
/usr/local/bin/386/logit -l reboot Fauth:$a(1) # for logging (my program).
don't mind
reboot
}
}
ar%
Kenji Arisawa
On 2012/08/21, at 14:08, Jeff Sickel wrote:
> As in using:
>
> Apr 12 22:46:05 CDT 2012 /n/sourcesdump/2012/0501/plan9/386/bin/ndb/dns
> 310819 [jmk]
> Oct 14 13:32:38 CDT 2011 /n/sourcesdump/2012/0412/plan9/386/bin/ndb/dns
> 310519 [sys]
>
> There are a few differences if you compare with sourcesdump. Knowing one that
> works should help narrow down the changes to get the latest working cleanly
> again.
>
> -jas
>
> On Aug 20, 2012, at 11:23 PM, arisawa wrote:
>
>> Hello
>>
>> Recent version of dns crashes.
>> Old version (for example, Apr this year) is OK.
>> It seems crashed dns make other side effect:
>> Many processes stop with Fauth status. # I don't know the reason.
>>
>> Kenji Arisawa
>
>
Re: [9fans] acme
Thanks Ron, Reboot dissolved the problem. The acme problem was happened both on my file server and the terminal. They had been running since the middle of this August. Kenji Arisawa On 2010/11/28, at 3:12, ron minnich wrote: > On Sat, Nov 27, 2010 at 4:39 AM, Kenji Arisawa > wrote: >> Hello 9fans, >> >> After recent update, acme does not run normally. >> When I execute acme command in a rio window then the window falls into blank >> with an error message something like >> "qunlock ..." >> Anyone experience similar phenomena? > > I just did a pull and reboot in vmware and don't see this. > > You could get two windows up, ratrace the rc in the other window, run > acme in the other window, and see what ratrace tells you. > > ron >
[9fans] acme
Hello 9fans, After recent update, acme does not run normally. When I execute acme command in a rio window then the window falls into blank with an error message something like "qunlock ..." Anyone experience similar phenomena? Kenji Arisawa
Re: [9fans] checkarenas
Thank Russ, > > I can't understand it either. > It doesn't make any sense to me. > It might be interesting to run > > cpu -h io > iostats venti/checkarenas -v /dev/sdC0/arenas arena.30 > > and see if the problem happens then. I have found the origin of the difference. checkarenas command on term was older then that of io. sorry for the fuss. Kenji Arisawa
[9fans] checkarenas
Hello, I noticed strange output that I cann't understand. term% cpu -h io io% venti/checkarenas -v /dev/sdC0/arenas arena='arena.0' [802816,537673728) version=4 created=1042806254 modified=1046935027 sealed score=d9da513c8906b67d118ffd862d3b6ffc098e2cd8 clumps=93,052 compressed clumps=33,339 data=642,249,221 compressed data=530,978,181 disk storage=536,840,457 [snip] arena='arena.29' [15570059264,16106930176) version=5 created=1202285650 modified=1238472397 sealed score=747a7af59246c9fac4d446c5060ad25b9ae6a317 clumps=164,001 compressed clumps=113,952 data=873,264,264 compressed data=526,509,628 disk storage=536,841,691 arena='arena.30' [16106930176,16643801088) version=5 created=1233280267 modified=1243743100 sealed score=7a67bb47cd7cac4166b08b2f1931bc7dff23ef80 clumps=312,611 compressed clumps=259,182 data=1,615,971,406 compressed data=517,139,649 disk storage=536,834,142 arena='arena.31' [16643801088,17180672000) version=5 created=1243743100 modified=1284116312 clumps=25,827 compressed clumps=22,564 data=152,702,493 compressed data=70,866,487 disk storage=72,493,588 io% # note that arena.30 is sealed. # on the otherhand, term% import -k'user=arisawa' io / /n/io.import term% venti/checkarenas -v /n/io.import/dev/sdC0/arenas arena='arena.0' [802816,537673728) version=4 created=1042806254 modified=1046935027 sealed score=d9da513c8906b67d118ffd862d3b6ffc098e2cd8 clumps=93,052 compressed clumps=33,339 data=642,249,221 compressed data=530,978,181 disk storage=536,840,457 [snip] arena='arena.29' [15570059264,16106930176) version=5 created=1202285650 modified=1238472397 sealed score=747a7af59246c9fac4d446c5060ad25b9ae6a317 clumps=164,001 compressed clumps=113,952 data=873,264,264 compressed data=526,509,628 disk storage=536,841,691 arena='arena.30' [16106930176,16643801088) version=5 created=1233280267 modified=1243743100 score=7a67bb47cd7cac4166b08b2f1931bc7dff23ef80 clumps=312,611 compressed clumps=259,182 data=1,615,971,406 compressed data=517,139,649 disk storage=536,834,142 arena='arena.31' [16643801088,17180672000) version=5 created=1243743100 modified=1284116312 clumps=25,827 compressed clumps=22,564 data=152,702,493 compressed data=70,866,487 disk storage=72,493,588 term% # note that arena.30 is NOT sealed. # the difference between two output is only in arena.30 I don't understand where the difference comes from. I believe that /dev/sdC0/arenas on io and /n/io.import/dev/sdC0/arenas mounted on term must be same. I also believe that venti/checkarenas -v file consults only the given file. Kenji Arisawa
Re: [9fans] entire cache is busy, 999 dirty
Hello erik, > are you running the latest version of fossil? probably not. I will refresh my file server. Thanks Kenji Arisawa On 2010/02/01, at 2:22, erik quanstrom wrote: >> My question is: >> (a) where these messages come from? venti? > > fossil. (cache.c) > >> (b) what is the problem? >> (c) how to fix? > > good question. are you running the latest > version of fossil? if not, this could be caused by slow > disk writes which could in turn be caused by the > periodic bug that cinap_lenrek reported. > > the 999 number is also curious. one would > expect that there are more than 999 blocks > in the cache. > > - erik >
[9fans] entire cache is busy, 999 dirty
Hello 9fans, Latterly my file server speaks annoying kernel message such as: entire cache is busy, 999 dirty -- waking flush thread cache is okay again entire cache is busy, 999 dirty -- waking flush thread cache is okay again ... My question is: (a) where these messages come from? venti? (b) what is the problem? (c) how to fix? My plan9 partitions are: hera% disk/prep -p /dev/sdC0/plan9 part 9fat 63 41027 part fossil 41027 21021587 part arenas 21021587 104943827 part isect0 104943827 109139939 part isect1 109139939 113336051 part nvram 113336051 113336052 part cache 113336052 115434108 part swap 115434108 117532164 part bloom 117532164 117597700 part vac 152100272 152100273 part fs 152100273 160826715 hera% # don't mined "vac", that is my own use. Kenji Arisawa
Re: [9fans] utf-8 text files from httpd
I think it is difficult to make web server to work correctly in case we have variety of charset text files on the server. Although we can manually select charset in browser menu, the selection is useless in case the page is written in Javascript that fills some portion of a page reading a text file. (note that the text file will be interpreted as ascii without "charset" in http header.) I believe the only solution every thing work correctly is to write all text files in utf-8 and put "charset=utf-8" in http header as Erik is trying. P.S. file(1) speaks only mine type but not charset. it is difficult or impossible to determine charset from a few japanese letters. Kenji Arisawa On 2009/10/19, at 19:00, Akshat Kumar wrote: new/sendfd.c:243 c old/sendfd.c:243 < --- /* new/sendfd.c:246 c old/sendfd.c:246 < --- */ (context: text/plain -> text/plain; charset=utf-8) Now my text files can be read in the proper encoding by default, and are not interpreted by browsers (as well as certain applications) to be whack ASCII. Is the output of file(1) appropriate for this purpose? Shouldn't your sample file also be sent as UTF-8? Thank you for the input, Mr. Arisawa. I agree with Erik in this case, as you wouldn't be doing much with files of other encodings on Plan 9 (well, prior to a tcs(1)), you really only need to worry about getting across UTF-8. The point about file handling being up to browsers is appropriate. However, I'd like to push as much standard behaviour from the server as I can. If there's an explicit account of the encoding and type of a file, then there ought to be no ambiguity. Thanks, ak
Re: [9fans] utf-8 text files from httpd
we should note also http://www.w3.org/TR/html4/charset.html#h-5.2.2. the document says: To sum up, conforming user agents must observe the following priorities when determining a document's character encoding (from highest priority to lowest): 1. An HTTP "charset" parameter in a "Content-Type" field. 2. A META declaration with "http-equiv" set to "Content-Type" and a value set for "charset". 3. The charset attribute set on an element that designates an external resource. Thus, hard coding "charset=utf-8" in http header will bring other problem because that coding disables a line in html header such as: Kenji Arisawa On 2009/10/19, at 11:16, Kenji Arisawa wrote: according to rfc2616, default charset in sending text file is ascii: The "charset" parameter is used with some media types to define the character set (section 3.4) of the data. When no explicit charset parameter is provided by the sender, media subtypes of the "text" type are defined to have a default charset value of "ISO-8859-1" when received via HTTP. Data in character sets other than "ISO-8859-1" or its subsets MUST be labeled with an appropriate charset value. See section 3.4.1 for compatibility problems. httpd need explicitly charset=utf-8 in http header in sending utf-8 text. Kenji Arisawa On 2009/10/19, at 9:34, Akshat Kumar wrote: I'm trying to put up a plain text file containing UTF-8 characters from httpd, but when viewing it from any browser, it comes off as an ASCII file that needs to be downloaded (so, those characters are garbled). Is this due to some behaviour of httpd? ak
Re: [9fans] utf-8 text files from httpd
according to rfc2616, default charset in sending text file is ascii: The "charset" parameter is used with some media types to define the character set (section 3.4) of the data. When no explicit charset parameter is provided by the sender, media subtypes of the "text" type are defined to have a default charset value of "ISO-8859-1" when received via HTTP. Data in character sets other than "ISO-8859-1" or its subsets MUST be labeled with an appropriate charset value. See section 3.4.1 for compatibility problems. httpd need explicitly charset=utf-8 in http header in sending utf-8 text. Kenji Arisawa On 2009/10/19, at 9:34, Akshat Kumar wrote: I'm trying to put up a plain text file containing UTF-8 characters from httpd, but when viewing it from any browser, it comes off as an ASCII file that needs to be downloaded (so, those characters are garbled). Is this due to some behaviour of httpd? ak
Re: [9fans] validateaddress
Hello Russ,
Your prediction is right as shown below.
ar% acid 1236297
/proc/1236297/text:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
acid: kw
0x00016120
acid: src(klook)
/sys/src/cmd/rc/var.c:47
42 kenter(SWITCH, "switch");
43 kenter(FN, "fn");
44 }
45
46 tree*
>47 klook(char *name)
48 {
49 struct kw *p;
50 tree *t = token(name, WORD);
51 for(p = kw[hash(name, NKW)];p;p = p->next)
52 if(strcmp(p->name, name)==0){
acid: mem(kw, "30X")
0x 0x00019870 0x 0x000197f0 0x00019830 0x
0x000197b0 0x 0x 0x00019730 0x 0x
0x 0x 0x 0x 0x 0x
0x 0x000196f0 0x00019770 0x 0x000198b0 0x
0x 0x000196b0 0x 0x 0x 0x
acid: *(kw+25*4)
0x000196b0
acid: mem(*(kw+25*4), "16X")
0x00015274 0xe003 0x000196b0 0xfaf0f1fe 0x 0x
0x 0x 0x 0x 0xef2c00be 0x0040
0x0a110c09 0x0040 0xbe2c 0x
acid: *(**(kw+25*4)\s)
in
acid:
By the way, how you can find
mem(*(kw+25*4), "16X") // dumps entry for 'in'
?
Kenji Arisawa
On 2009/08/12, at 23:59, Russ Cox wrote:
so strcmp is being called a lot but klook isn't.
that means that klook is looping inside, which
basically means the p->next pointer is pointing
at itself.
final script:
kw
mem(kw, "30X") // dumps hash table
*(kw+25*4)
mem(*(kw+25*4), "16X") // dumps entry for 'in'
*(**(kw+25*4)\s) // should print 'in'
i expect that the value printed for *(kw+25*4)
in the third line will also be the third value printed
by the mem on the fourth line, meaning that
the hash table entry in question has a next
pointer pointing at itself. assuming that is true,
i think we're close to the end of what can be done.
the hash table list isn't supposed to loop back
on itself but it is. that means some kind of dangling
pointer or other memory corruption error, which
we're not likely to find retroactively.
russ
Re: [9fans] validateaddress
Thanks Russ,
ar% ps
...
none1236297 49979:50 0:00 172K Running validateaddress
...
ar% acid 1236297
/proc/1236297/text:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
acid: bpset(strcmp)
Waiting...
1236297: exception 50 klook+0x7a MOVL0x8(DX),DX
acid: loop 1,20 do { cont(); print("strcmp '", *(*strcmp:s1\s), "'
'",*(*strcmp:s2\s), "'\n"); }
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
1236297: breakpoint strcmp+0x3 MOVLs1+0x0(FP),BP
1236297: breakpoint strcmp SUBL$0xc,SP
strcmp 'in' 'prompt'
acid: acid: bpdel(strcmp)
acid: bpset(klook)
acid: cont();
:5: (error) msg: pid=1236297 startstop: interrupted
acid: bpdel(klook)
Kenji Arisawa
On 2009/08/12, at 0:27, Russ Cox wrote:
acid pid
bpset(strcmp)
loop 1,20 do { cont(); print("strcmp '", *(*strcmp:s1\s), "' '",
*(*strcmp:s2\s), "'\n"); }
bpdel(strcmp)
also
bpset(klook)
cont();
# wait a while, see if you hit the breakpoint, probably not
DEL (to stop acid if it didn't hit the breakpoint)
bpdel(klook)
if you do hit the klook breakpoint then try
the same sequence but with yyparse instead
of klook.
the goal is to find some function that isn't being
repeatedly called. that helps narrow down the
source of the infinite loop to code inside that
function or the ones it calls.
russ
Re: [9fans] validateaddress
Thanks Erik,
ar% ps -a
...
none1236297 48578:46 0:00 172K Running
validateaddress /mail/lib/validateaddress ar.aichi-u.ac.jp!hatbox
...
ar% ACID -l /sys/lib/acid/truss 1236297
/proc/1236297/text:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
/sys/lib/acid/truss
acid: truss()
no output, so I examined the status using ps
ar% ps -a
...
none1236297 48578:46 0:00 172K Running
validateaddress /mail/lib/validateaddress ar.aichi-u.ac.jp!hatbox
...
bootes 20563240:00 0:00 236K AwaitACID /bin/ACID -
l /sys/lib/acid/truss 1236297
bootes 20563280:00 0:00 1472K Stopwait acid -l /sys/lib/
acid/truss 1236297
bootes 20563290:00 0:00 188K Preadps -a
where ACID does
chmod 660 /proc/1236297/mem
acid -l /sys/lib/acid/truss 1236297
Thanks
Kenji Arisawa
On 2009/08/11, at 13:07, erik quanstrom wrote:
On Mon Aug 10 23:59:56 EDT 2009, aris...@ar.aichi-u.ac.jp wrote:
Thanks Erik.
However I don't know how to truss running process.
Kenji Arisawa
for example:
; cat > truss.c
#include
#include
void
main(void)
{
for(;;)
sleep(10*1000);
}
; 8c -FVTw truss.c && 8l -o truss truss.8
; truss&
; acid -l/sys/lib/acid/truss $apid
/proc/116801/text:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
/sys/lib/acid/truss
acid: truss()
sleep(1)
return value: 0
- erik
Re: [9fans] validateaddress
Thanks Erik. However I don't know how to truss running process. Kenji Arisawa On 2009/08/11, at 2:13, erik quanstrom wrote: would be interesting to see *(0x16548\s). have you tried truss(1)ing that process? - erik
[9fans] validateaddress
something wrong web 8365680:01 1:55 1536K Open httpd web 8365700:56 0:00 272K Preadfactotum none1236297 47181:19 0:00 172K Running validateaddress web 13535600:00 0:00 40K Preadread ar% ACID 1236297 /proc/1236297/text:386 plan 9 executable /sys/lib/acid/port /sys/lib/acid/386 acid: lstk() klook(name=0x16548)+0x55 /sys/src/cmd/rc/var.c:52 t=0x1bed0 p=0x196b0 yylex()+0x1a0 /sys/src/cmd/rc/lex.c:372 w=0x1654e d=0x1eb1 c=0x29 t=0x1c190 yylex1()+0x8 /sys/src/cmd/rc/syn.y:224 yyparse()+0xa7e /sys/src/cmd/rc/syn.y:316 save1=0x0 save2=0x1b910 save3=0x0 save4=0x0 yystate=0x18 yychar=0x yys=0x0 yyp=0xdfffdf0c yyn=0x11e yypt=0x0 Xrdcmds()+0x75 /sys/src/cmd/rc/exec.c:899 p=0x1b9b0 main(argc=0x3,argv=0xdfffef74)+0x327 /sys/src/cmd/rc/exec.c:184 rcmain=0x144c4 num=0x36333231 bootstrap=0x2 i=0x1 _main+0x31 /sys/src/libc/386/main9.s:16 acid: lstk() strcmp(s1=0x15274,s2=0x16548)+0x11 /sys/src/libc/port/strcmp.c:11 klook(name=0x16548)+0x55 /sys/src/cmd/rc/var.c:52 t=0x1bed0 p=0x196b0 yylex()+0x1a0 /sys/src/cmd/rc/lex.c:372 w=0x1654e d=0x1eb1 c=0x29 t=0x1c190 yylex1()+0x8 /sys/src/cmd/rc/syn.y:224 yyparse()+0xa7e /sys/src/cmd/rc/syn.y:316 save1=0x0 save2=0x1b910 save3=0x0 save4=0x0 yystate=0x18 yychar=0x yys=0x0 yyp=0xdfffdf0c yyn=0x11e yypt=0x0 Xrdcmds()+0x75 /sys/src/cmd/rc/exec.c:899 p=0x1b9b0 main(argc=0x3,argv=0xdfffef74)+0x327 /sys/src/cmd/rc/exec.c:184 rcmain=0x144c4 num=0x36333231 bootstrap=0x2 i=0x1 _main+0x31 /sys/src/libc/386/main9.s:16 acid: Kenji Arisawa
Re: [9fans] faster vesa driver
Hello Geoff, I am glad if mtrr makes effect only to single processor until the mtrr can support multi-core processor. Kenji Arisawa On 2009/06/10, at 6:18, ge...@plan9.bell-labs.com wrote: I've just pushed out kernel sources and binaries to incorporate Aki's mtrr and vesa changes. The combination makes monitor=vesa run quite a bit faster; we saw a factor of three speed improvement in one case. It's still limited to a single processor, but we've got someone investigating ways to fix that.
Re: [9fans] faster vesa driver
Thanks Geoff, That made great effect to my VIA LN1EG! Kenji Arisawa On 2009/06/10, at 6:18, ge...@plan9.bell-labs.com wrote: I've just pushed out kernel sources and binaries to incorporate Aki's mtrr and vesa changes. The combination makes monitor=vesa run quite a bit faster; we saw a factor of three speed improvement in one case. It's still limited to a single processor, but we've got someone investigating ways to fix that.
Re: [9fans] Realtek 8111C
Hello, I tried 8111C on GIGABYTE GA-G31M-S2L, but the controller did not work for me. I don't know if recent driver works. Additional information welcome. Kenji Arisawa On 2009/03/13, at 5:27, Tharaneedharan Vilwanathan wrote: hi erik, thanks for the quick response. regards dharani On Thu, Mar 12, 2009 at 1:17 PM, erik quanstrom wrote: works fine for me, even with jumbo packets: 5.0.0: net 02.00.00 10ec/8168 10 0:d801 256 2:feaff004 4096 3: 16 Realtek Semiconductor RTL8168/8111 Gigabit Ethernet NIC(NDIS 6.0) i'm too lazy to check if it's exactly a 8111c, but i've never had trouble with realtek 8169-style controllers. - erik
Re: [9fans] ping suicide: sys: trap: divide error pc=0x00003953c
Hello,
ip/ping -r -f www.google.com
io% ip/ping -r -f www.google.com
sending 32 64 byte messages 0 ms apart to icmp!www.google.com!1
ping 34691: suicide: sys: trap: divide error pc=0x3953
0: rtt 9797 µs, avg rtt 9797 µs, ttl = 245
io% ps
...
arisawa 346790:00 0:00 128K Preadtcp17010
arisawa 346910:00 0:00 140K Broken ping
arisawa 346950:00 0:00 140K Preadping
arisawa 346960:00 0:00 192K Preadps
io% acid 34691
/proc/34691/text:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
acid: lstk()
nrand(n=0x0)+0x18 /sys/src/libc/port/nrand.c:13
slop=0xa39fb2cf
sender(msglen=0x40,n=0x20,interval=0x0,fd=0x6)+0x151 /sys/src/cmd/ip/
ping.c:268
seq=0xef0c4ef8
buf=0x0
icmp=0xdffeed0e
me=0x0
mev4=0x501a8c0
i=0x1
r=0x22b78
main(argv=0xdfffefa0,argc=0x1)+0x212 /sys/src/cmd/ip/ping.c:571
interval=0x0
msglen=0x40
nmsg=0x20
_argc=0x66
_args=0xdfffefb8
ds=0x11534
fd=0x6
_main+0x31 /sys/src/libc/386/main9.s:16
acid:
echo kill > /proc/34691/ctl
io% cat /sys/src/libc/port/nrand.c
#include
#include
#define MASK0x7fffL
int
nrand(int n)
{
long slop, v;
if(n < 0)
return n;
slop = MASK % n;
do
v = lrand();
while(v <= slop);
return v % n;
}
Think that where and why nrand(0) is executed and fix the problem.
Kenji Arisawa
On 2009/03/09, at 18:38, ROuNIN wrote:
Hello all,
I would like to learn how to fix this in the ping C code, I am new to
plan9 and C
ip/ping -r -f www.google.com
sending 32 64 bytes messages 0 ms apart to icmp!www.google.com!1
ping 238: suicide: sys: trap: divide error pc=0x3953
term% 0: rrt 38841 us, avg rtt 38841 us, ttl = 128
ROuNIN
[9fans] proxy server
Hello, I have written HTTP proxy server that runs on Plan 9 and is written in Lua. Look http://plan9.aichi-u.ac.jp/netlib/lua/ I developed "proxy.lua" to inspect live HTTP communication therefore the server does nothing but transfer. However I believe adding other functionalities is not so difficult. Kenji Arisawa
[9fans] tlssrv and tlsclient
Hello, I am hung up! Please any one help me. io% aux/listen1 'tcp!*!8010' /bin/tlssrv -c/sys/tls/cert /bin/aux/ trampoline 'tcp!io!7' term% tlsclient tcp!io!8010 tlsclient: tlsclient: devtls expected ver=301, saw (len=28207) type=2f ver=6269 '/bin/�H��!' term% tlssrv and tlsclient fails in negotiation at version confirmation. what's wrong? - certificate "/sys/tls/cert" is working for Pegasus. - tcp!io!7 is working. - tlsclient can communicate with Pegasus in https protocol. - tlssrv and tlsclient are the most recent ones: term% ls -l /bin/tlssrv /bin/tlsclient --rwxrwxr-x M 9 sys sys 199254 May 10 2008 /bin/tlsclient --rwxrwxr-x M 9 sys sys 199634 Jun 27 2008 /bin/tlssrv term% Kenji Arisawa
Re: [9fans] Pegasus 2.6 is released
Sorry, http://plan9.aichi-u.ac.jp/pegasus/eman-2.6/ Kenji Arisawa On 2009/02/01, at 13:41, lu...@proxima.alt.za wrote: Pegasus 2.6 is released with new WebDAV script written in Lua. Take a look at http://plan9/remoty/pegasus/eman-2.6/ for more details. We need a little bit more than "plan9" in the host name :-) ++L
Re: [9fans] Pegasus 2.6 is released
Sorry, http://plan9.aichi-u.ac.jp/pegasus/eman-2.6/ Kenji Arisawa On 2009/02/01, at 13:41, lu...@proxima.alt.za wrote: Pegasus 2.6 is released with new WebDAV script written in Lua. Take a look at http://plan9/remoty/pegasus/eman-2.6/ for more details. We need a little bit more than "plan9" in the host name :-) ++L
[9fans] Pegasus 2.6 is released
Hello, Pegasus 2.6 is released with new WebDAV script written in Lua. Take a look at http://plan9/remoty/pegasus/eman-2.6/ for more details. Enjoy Kenji Arisawa
Re: [9fans] Sources Gone?
Hello, Several years ago I abandoned replica and switched to my own tool "upadate", but I hesitated to make it public because replica is so fundamental tools for Plan 9. The major problem is(was?) replica doesn't properly arrange update data-base before it begins to retrieve files. The laxness makes replica very slow. If replica is to be improved I hope replica looks owner/group information of files in updating. If these information is different from official one, then the file should be regarded as having modified by users. Kenji Arisawa On 2009/01/28, at 8:32, Russ Cox wrote: But people keep telling me that replica's unreliability, painful slowness, and general clunkyness, are all in my imagination, so what do I know... No, what we've told you, repeatedly, is that whining about problems and fixing them are two different things. Fixes are appreciated. Russ
Re: [9fans] dealing with spam
Hello, I am using this one: http://plan9.aichi-u.ac.jp/spamfilter/ which is working quite comfortably for me. Kenji Arisawa On 2009/01/09, at 5:49, erik quanstrom wrote: I am using the standard smtpd with -D and the greylisting, and also a modified validateserder which probably qualifies as an earlier incarnation of erik's (he sent me the code before nupas was finished and I hacked it a bit). /n/sources/contrib/quanstro/src/nupas/bits/validatesender - erik
Re: [9fans] (no subject)
Hello,
If such an attack continues for some minutes and the server does not
reject the connections
the server will create thousands of smtpd processes and might be hung
up.
Kenji Arisawa
On 2008/11/22, at 3:28, erik quanstrom wrote:
Subjet: email attacks
since our friends in sweeden helped out our spammer friends
get back on line, i've seen a lot more attacks. today i've been
getting ~10 connections/sec. fortunately its from a small
number of machines, so this trick helps alot:
/n/dump/2008/1121/sys/src/cmd/upas/smtp/smtpd.c:348,353 - smtpd.c:
348,355
if(!qflag)
syslog(0, "smtpd", "Hung up on %s; "
"claimed to be %s", nci->rsys,
him);
+ if(Dflag)
+ sleep(delaysecs()*1000);
reply("554 5.7.0 Liar!\r\n");
exits("client pretended to be us");
return;
oddly, i've found that adding a few of the hosts as -k flags stops
the attack
entirely.
- erik
Re: [9fans] broken smtpd
Hello,
I added some debugging codes to catchalarm() in smtpd.c
static int
catchalarm(void *a, char *msg)
{
int rv = 1;
static int count = 0; // DEBUG by Kenar
count++;
if(count > 3)
return 0;
USED(a);
/* log alarms but continue */
if(strstr(msg, "alarm")){
if(senders.first && rcvers.first)
syslog(0, "smtpd", "note: %s->%s: %s",
s_to_c(senders.first->p),
s_to_c(rcvers.first->p), msg);
else
syslog(0, "smtpd", "note: %s", msg);
rv = 0;
}
syslog(0, "smtpd", "note: %s", msg); // DEBUG by Kenar
/* kill the children if there are any */
if(pp)
syskillpg(pp->pid);
return rv;
}
after that I found broken smtpd:
none 503920:00 0:00 264K Broken smtpd
note that wasted cpu time is now 0:00
/sys/log/smtpd shows:
ar Nov 19 02:23:05 ehlo from 124.8.67.36 as sotcndhz.com
ar Nov 19 02:23:08 note: sys: trap: fault read addr=0x4 pc=0x7463
ar Nov 19 02:23:08 note: sys: trap: fault read addr=0x4 pc=0x7463
ar Nov 19 02:23:08 note: sys: trap: fault read addr=0x4 pc=0x7463
Kenji Arisawa
On 2008/11/17, at 21:51, erik quanstrom wrote:
d'oh! the return value from catchalarm looks reversed. from
notify(2)
[...] A handler must
return a non-zero number if the note was recognized (and
resolved); otherwise it must return zero. When the system
i think you're getting into some sort of note loop. i think it would
be helpful to log all notes. i would try something like this
static int
catchalarm(void *, char *msg)
{
static int chattycathy;
if(chattycathy++ > 5)
return 0;
if(senders.first && rcvers.first)
syslog(0, "smtpd", "note: %s->%s: %s",
s_to_c(senders.first->p),
s_to_c(rcvers.first->p), msg);
else
syslog(0, "smtpd", "note: %s", msg);
if(pp){
syskillpg(pp->pid);
pp = 0;
}
return strstr(msg, "alarm") != 0;
}
but at a minimum, i would reverse the return values.
- erik
Re: [9fans] broken smtpd
Hello,
Today, I observed smtpd that was in endless loop and then broken.
ar% ps
...
none 203920:01 28:27 264K Running smtpd
...
ar% ACID 20392
/proc/20392/text:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
acid: lstk()
receiver(path=0x41f58)+0x1c5 /sys/src/cmd/upas/smtp/smtpd.c:625
sender=0x379bf
rcpt=0x41ad8
zzparse()+0x2c9 /sys/src/cmd/upas/smtp/smtpd.y:773
save1=0x0
save2=0x0
save3=0x0
save4=0x0
zzstate=0xf
zzchar=0x
zzs=0x3f36b
zzp=0xdfffe41c
zzn=0xfc18
main(argv=0xdfffefa4,argc=0x0)+0x261 /sys/src/cmd/upas/smtp/smtpd.c:194
netdir=0xdfffefbc
_argc=0x6e
_args=0x376c2
buf=0x0
_main+0x31 /sys/src/libc/386/main9.s:16
acid: src(receiver+0x1c5)
/sys/src/cmd/upas/smtp/smtpd.c:625
620
621logged = 0;
622
623/* forwarding() can modify 'path' on loopback request */
624 if(filterstate == ACCEPT && fflag && !authenticated &&
forwarding(path)) {
>625 syslog(0, "smtpd", "Bad Forward %s (%s/%s) (%s)",
626s_to_c(senders.last->p), him, nci->rsys,
s_to_c(path));
627rejectcount++;
628reply("550 5.7.1 we don't relay. send to [EMAIL PROTECTED]
for "
629"loopback.\r\n");
630return;
I don't observe "Bad Forward" of this mail in /sys/log/smtpd.
After some amount of time,
ar% ps
...
none 203920:02 44:57 264K Broken smtpd
...
acid: lstk()
errstr()+0x7 /sys/src/libc/9syscall/errstr.s:5
syslog(logname=0x3760a,cons=0x0,fmt=0x37610)+0x20 /sys/src/libc/9sys/
syslog.c:46
err=0x616d2f27
d=0x0
ctim=0x0
buf=0x0
p=0x0
arg=0x0
n=0x0
catchalarm(msg=0xdfffe1ac)+0x5d /sys/src/cmd/upas/smtp/smtpd.c:68
rv=0x1
notifier+0x30 /sys/src/libc/port/atnotify.c:15
acid: src(syslog+0x29)
/sys/src/libc/9sys/syslog.c:46
41 Dir *d;
42 char err[ERRMAX];
43
44 err[0] = '\0';
45 errstr(err, sizeof err);
>46 lock(&sl);
47
48 /*
49 * paranoia makes us stat to make sure a fork+close
50 * hasn't broken our fd's
51 */
acid:
I hope the above information is helpful to fix the problem.
Kenji Arisawa
On 2008/11/06, at 21:59, erik quanstrom wrote:
Is this phenomenon specific to me?
No, it isn't:
term% ps|grep Broken
none9172:08 42:50 264K Broken smtpd
impressive!
i don't see this problem, but i have implemented
some fairly agressive spam control. perhaps this
shows up after i tend to hang up.
(it is possible to use nupas smtpd with regular old
upas.)
would anyone mind sending me a full backtrace?
- erik
[9fans] broken smtpd
Hello,
I sometimes observe broken smtpd.
ar% ps
...
none19485780:01 44:55 264K Broken smtpd
none25211720:01 44:58 264K Broken smtpd
none31900370:01 45:03 264K Broken smtpd
...
ar% ACID 3190037
/proc/3190037/text:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
acid: lstk()
errstr()+0x7 /sys/src/libc/9syscall/errstr.s:5
syslog(logname=0x3760a,cons=0x0,fmt=0x37610)+0x20 /sys/src/libc/9sys/
syslog.c:46
err=0x616d2f27
d=0x0
ctim=0x0
buf=0x0
p=0x0
arg=0x0
n=0x0
catchalarm(msg=0xdfffe1ac)+0x5d /sys/src/cmd/upas/smtp/smtpd.c:68
rv=0x1
notifier+0x30 /sys/src/libc/port/atnotify.c:15
acid:
ar% pr -tn /sys/src/libc/9sys/syslog.c
...
34 void
35 syslog(int cons, char *logname, char *fmt, ...)
36 {
37 char buf[1024];
38 char *ctim, *p;
39 va_list arg;
40 int n;
41 Dir *d;
42 char err[ERRMAX];
43
44 err[0] = '\0';
45 errstr(err, sizeof err);
46 lock(&sl);
47
...
Is this phenomenon specific to me?
Kenji Arisawa
Re: [9fans] test command
Hello, On 2008/09/11, at 11:38, Russ Cox wrote: there are certainly better ways to do this, but this works: as does /bin/mtime. I didn't know this command. thanks russ and erik. Kenji Arisawa
Re: [9fans] test command
Hello, On 2008/09/11, at 1:15, Gorka Guardiola wrote: yes, but !older is the same as younger or equal. yes. But then there is = and != for strings (for example), so this argument is thin :-). if we can easily get modified time of a file in the format of UNIX time, where "easily" means "in the set of plan 9 commands". Kenji Arisawa
[9fans] test command
Hello, "test" command of plan 9 has a operator "older", the usage is: test f -older t where f is a file and t is a time. however the command does not have "newer" operator. why? Kenji Arisawa
[9fans] dns failure in smtp
Sorry for noise.
Someone in this list send me a mail but I cannot reply to the mail
because of dns failure in smtp.
This is a private message to him.
ar% pwd
/sys/log
ar% tail smtp.fail
ar Aug 24 08:30:13 dns: dns failure (net!sounine.nanosouffle.net)
ar Aug 24 09:40:13 dns: dns failure (net!sounine.nanosouffle.net)
ar Aug 24 10:50:13 dns: dns failure (net!sounine.nanosouffle.net)
ar Aug 24 12:00:13 dns: dns failure (net!sounine.nanosouffle.net)
ar Aug 24 13:10:14 dns: dns failure (net!sounine.nanosouffle.net)
ar Aug 24 14:20:13 dns: dns failure (net!sounine.nanosouffle.net)
ar Aug 24 15:30:13 dns: dns failure (net!sounine.nanosouffle.net)
ar Aug 24 16:40:13 dns: dns failure (net!sounine.nanosouffle.net)
ar Aug 24 17:50:13 dns: dns failure (net!sounine.nanosouffle.net)
ar Aug 24 19:16:08 dns: dns failure (net!sounine.nanosouffle.net)
ar% ndb/dnsquery
> sounine.nanosouffle.net mx
!dns: resource does not exist
> sounine.nanosouffle.net
sounine.nanosouffle.net ip 75.58.233.41
>
I think mx record is required in official dns server, although I feel
the condition is too strict.
/sys/src/cmd/upas/smtp/mxdial.c
nmx = 0;
snprint(buf, sizeof buf, "%s mx", ds->host);
if(debug)
fprint(2, "sending %s '%s'\n", dnsname, buf);
/*
* don't hang indefinitely in the write to /net/dns.
*/
n = timedwrite(fd, buf, strlen(buf), 60*1000);
if(n < 0){
rerrstr(buf, sizeof buf);
if(debug)
fprint(2, "dns: %s\n", buf);
if(strstr(buf, "dns failure")){
/* if dns fails for the mx lookup, we have to stop */
close(fd);
return -1;
}
} else {
Kenji Arisawa
Email: [EMAIL PROTECTED]
Re: [9fans] sshserve.c
Thanks Pietro,
I am glad if someone can help me.
Using MacFUSE + sshfs, I have:
-bash$ sshfs ar.aichi-u.ac.jp: /n/ar
remote host has disconnected
-bash$
Then /sys/log/ssh says:
ar Apr 16 07:53:15 [359853] connect from 124.241.154.73!53142
/bin/aux/sshserve: reading server version: unexpected EOF
The host ar is a Plan 9 cpu server servicing tcp22 as
exec /bin/aux/sshserve -A 'password' `{cat $3/remote} >>[2]/
sys/log/ssh
Of course I can connect to ar using
ssh ar.aichi-u.ac.jp
Kenji Arisawa
On 2008/04/16, at 7:29, Pietro Gagliardi wrote:
Yup. usage() is calling itself with no termination condition - and
what's more, it is tail recursing. It should be
void
usage(void)
{
fprint(2, "usage: sshserve [-A authlist] [-c cipherlist] client-
ip-address\n");
exits("usage");
}
to keep with the Plan 9 program. Enjoy!
When this QEMU-on-Leopard-freezes-randomly bug gets fixed, I can
fix it and any other dangers.
[9fans] sshserve.c
Hello,
In sshserve.c:
void
usage(void)
{
fprint(2, "usage: sshserve [-A authlist] [-c cipherlist] client-ip-
address\n");
usage();
}
This code can make endless loop. Right?
Kenji Arisawa
