January 2008 - Darwin-dev - lists.apple.com

IPv6 connection issues
by Andre-John Mas 07 Jan '08

07 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi, I am playing with IPv6 and have recently set up Apache 2 old on PowerMac, which I use as a server. The Mac running the server is a PowerPC G4 with 10.4.11 and my main Mac is an MacBook Pro with 10.5.1. The Apache2 server responds to IPv6, when I query it from locally, using http://[::1], using Safari. On the other hand when I try accessing the server, from my Intel machine, using the IPv6 address specifed by the en0 interface I can't connect: http://[fe80::230:65ff:fed6:b164] or http://[fe80::230:65ff:fed6:b164%en0] No idea if the second is valid form? Additionally, on the server computer, doing: ping6 ::1 responds, but ping to either fe80::230:65ff:fed6:b164 or fe80::230:65ff:fed6:b164%en0 (its own address) responds in: ping6: UDP connect: No route to host The interface, as described by ifconfig is: en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 inet6 fe80::230:65ff:fed6:b164%en0 prefixlen 64 scopeid 0x4 inet 192.168.2.101 netmask 0xffffff00 broadcast 192.168.2.255 ether 00:30:65:d6:b1:64 media: autoselect (100baseTX <full-duplex>) status: active supported media: none autoselect 10baseT/UTP <half-duplex> 10baseT/UTP <full-duplex> 10baseT/UTP <full-duplex,hw-loopback> 100baseTX <half-duplex> 100baseTX <full-duplex> 100baseTX <full-duplex,hw-loopback> 1000baseT <full-duplex> 1000baseT <full-duplex,hw-loopback> 1000baseT <full-duplex,flow-control> 1000baseT <full-duplex,flow-control,hw-loopback> If anyone has a better IPv6 background I would appreciate the suggestions. Note: when doing this tests I have no 6to4 (aiccu or miredo) established. Andre _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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RE: fread/fwrite/fflush bug
by Norm Green 07 Jan '08

07 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Posix Timers?
by Terry Lambert 06 Jan '08

06 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Try <unistd.h>. -- Terry On Jan 5, 2008, at 8:53 AM, Andre-John Mas <ajmas(a)sympatico.ca> wrote: Hi, Could someone tell me whether MacOS X supports POSIX timers? Andre _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/tlambert%40apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to tlambert(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Re: ECX_BAD_ACCESS again
by Jonas Maebe 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On 05 Jan 2008, at 14:07, Robert Bielik wrote: Jonas _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Jonas Maebe wrote: One warning about this: for i386 (Intel 32 bit), passing arguments is not going to work like that in C because the default calling convention there passes everything on the stack (while ours is fastcall, where the first three parameters are passed in registers). You may be able to declare your handler in gcc also as fastcall to work around this, but I don't know by heart how this is done. Or you may simply not pass any parameters at all. Ok, nice! As I know exactly where and when the exception might be thrown, I don't need to pass any params. As an aside, is there a way to register signal handlers scope-wise? That is, only to intercept a signal within a specific scope? Even though the library call is the only place where this happens, I guess that signal handling is global for the entire process? Signal handlers are always global for the entire process. You can use pthread_sigmask to mask certain signals in certain threads, but the handler itself and whether or not it's installed is always the same for all threads. Additionally, synchronous signals such as a SIGSEGV should always be sent to the thread in which it was triggered. This email sent to site_archiver(a)lists.apple.com

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Re: Posix Timers?
by Jordan K. Hubbard 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jan 5, 2008, at 10:45 AM, Andre-John Mas wrote: - Jordan _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Thanks, do you know whether there are any plans to improve compliance? I'll open a radar ticket if necessary. We implemented everything UNIX03 specified as mandatory and only some of the things they specified as optional, which is the category that POSIX timers fall into. If you have a specific need for any of the optional API(s), please by all means file a radar. It will help us to track that requirement and, if multiple people express an interest, set a priority for it. Thanks. This email sent to site_archiver(a)lists.apple.com

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Re: Posix Timers?
by Andre-John Mas 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On 5-Jan-08, at 13:06 , Steve Checkoway wrote: On Jan 5, 2008, at 8:53 AM, Andre-John Mas wrote: Andre _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Could someone tell me whether MacOS X supports POSIX timers? If you mean the api specified in <http://www.jaluna.com/doc/c5/html/Overview/x5408.html > (just the first hit on google), then the answer would seem to be no: $ find /usr/include -name '*.h'|xargs egrep 'clock_(settime|gettime| getres)|timer_(create|delete|settime|gettime|getoverrun)|nanosleep' /usr/include/php/ext/standard/ basic_functions.h:PHP_FUNCTION(time_nanosleep); /usr/include/php/main/php_config.h:/* Define if you have the nanosleep function. */ /usr/include/time.h:int nanosleep(const struct timespec *, struct timespec *) __DARWIN_ALIAS_C(nanosleep); Only nanosleep seems to be there. Thanks, do you know whether there are any plans to improve compliance? I'll open a radar ticket if necessary. This email sent to site_archiver(a)lists.apple.com

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Re: Posix Timers?
by Steve Checkoway 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jan 5, 2008, at 8:53 AM, Andre-John Mas wrote: Only nanosleep seems to be there. -- Steve Checkoway "Anyone who says that the solution is to educate the users hasn't ever met an actual user." -- Bruce Schneier _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com Could someone tell me whether MacOS X supports POSIX timers? If you mean the api specified in <http://www.jaluna.com/doc/c5/html/Overview/x5408.html > (just the first hit on google), then the answer would seem to be no: $ find /usr/include -name '*.h'|xargs egrep 'clock_(settime|gettime| getres)|timer_(create|delete|settime|gettime|getoverrun)|nanosleep' /usr/include/php/ext/standard/ basic_functions.h:PHP_FUNCTION(time_nanosleep); /usr/include/php/main/php_config.h:/* Define if you have the nanosleep function. */ /usr/include/time.h:int nanosleep(const struct timespec *, struct timespec *) __DARWIN_ALIAS_C(nanosleep); smime.p7s

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Re: fread() bug?
by Steve Checkoway 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jan 5, 2008, at 8:29 AM, Norm Green wrote: Something like this? steve$ cat write.c #include <stdio.h> #include <unistd.h> #include <stdint.h> #include <stdlib.h> int main( int argc, const char **argv ) { FILE *w = fopen( "foo", "w" ); ASSERT( w ); int32_t num = 0xAABBCCDD; ASSERT( fwrite(&num, 4, 1, w) == 1 ); ASSERT( fflush(w) == 0 ); FILE *r = fopen( "foo", "r" ); ASSERT( r ); ASSERT( fread(&num, 4, 1, r) == 1 ); ASSERT( num == 0xAABBCCDD ); ASSERT( fseek(w, 0, SEEK_SET) == 0 ); num = 0x11223344; ASSERT( fwrite(&num, 1, 1, w) == 1 ); ASSERT( fflush(w) == 0 ); if( argc > 1 ) ASSERT( fpurge(r) == 0 ); ASSERT( fseek(r, 0, SEEK_SET) == 0 ); ASSERT( fread(&num, 1, 1, r) == 1 ); printf( "%#x\n", num ); ASSERT( num == 0x11223344 ); ASSERT( fclose(r) == 0 ); ASSERT( fclose(w) == 0 ); return 0; } steve$ gcc -Wall write.c steve$ ./a.out 0xaa223344 31: num == 0x11223344: Undefined error: 0 steve$ ./a.out foo 0x11223344 -- Steve Checkoway "Anyone who says that the solution is to educate the users hasn't ever met an actual user." -- Bruce Schneier _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com I've found what I consider to be a stream IO bug. Here's what's happening: [snip] Is this is a bug? Are there any work arounds? I wouldn't think this is a bug. Stream IO is buffered. Just because you flushed the output doesn't mean you flushed the input. I would expect it to read from its buffer. Try fpurge(3). It seems to be a BSD function, though. I wrote a simple test case to demonstrate this problem, which passes on Solaris. #define STR(x) XSTR(x) #define XSTR(x) #x #define ASSERT( x ) \ do { if( !(x) ) { perror( STR(__LINE__) ": " #x ); exit( 1 ); } } while( 0 ) fpurge(3) seems to advance the file pointer so you have to seek after you purge. smime.p7s

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Posix Timers?
by Andre-John Mas 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi, Could someone tell me whether MacOS X supports POSIX timers? Andre _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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fread() bug?
by Norm Green 05 Jan '08

05 Jan '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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