April 2005 - Darwin-dev - lists.apple.com

Re: Calling a Command line tool from an application
by Tommy Nordgren 11 Apr '05

11 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Apr 11, 2005 kl. 11:26 PM skrev Justin Walker: On Apr 11, 2005, at 14:17, Rick Steele wrote: There are two ways to do it: - the low-level API "exec(3)" will give you several ways to exec a program, with or without both command-line arguments and environment variables - system(3) will take a string that represents a command + arguments, and figure out how to call the appropriate exec system call "Home is not where you are born, but where your heart finds peace" - Tommy Nordgren, "The dying old crone" _______________________________________________ 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… Can anybody point me to docs which explain calling a command line tool from an application an providing it argumetns? The latter has fallen into disrepute due to the potential for security problems, so I would recommend the former, especially if you plan on distribute the software to others. There is one caveat of using exec. It will actually REPLACE your application process with the command line tool process. To work around this it is necessary to also use the fork call, which will create a duplicate application process. This email sent to site_archiver(a)lists.apple.com

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Re: Calling a Command line tool from an application
by Justin Walker 11 Apr '05

11 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Apr 11, 2005, at 14:17, Rick Steele wrote: There are two ways to do it: - the low-level API "exec(3)" will give you several ways to exec a program, with or without both command-line arguments and environment variables - system(3) will take a string that represents a command + arguments, and figure out how to call the appropriate exec system call Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- Men are from Earth. Women are from Earth. Deal with it. -------- _______________________________________________ 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… Can anybody point me to docs which explain calling a command line tool from an application an providing it argumetns? The latter has fallen into disrepute due to the potential for security problems, so I would recommend the former, especially if you plan on distribute the software to others. This email sent to site_archiver(a)lists.apple.com

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Calling a Command line tool from an application
by Rick Steele 11 Apr '05

11 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com thanks guys Rick Steele _______________________________________________ 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… Can anybody point me to docs which explain calling a command line tool from an application an providing it argumetns? This email sent to site_archiver(a)lists.apple.com

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Re: Getting info about status of a kernel extension
by Dean Reece 11 Apr '05

11 Apr '05

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… On Apr 11, 2005, at 03:17, Martin Bestmann wrote: I like to get the info (via an API) if a specific kernel extension is loaded or not loaded. In case if it is not loaded why it wasn't loaded (e.g. wrong dependencies or authentication errors because of incorrect permission). I like to write a quick user client application to better troubleshoot why a kernel extension wouldn't load at the customer. There aren't supported APIs available for doing what you want. Probably the best approach to find out if a kext is loaded is the exect "kextstat" and search the output for your CFBundleIdentifier. As for figuring out why it wouldn't load, you can try loading it with "-v" ... pick a level that provides the amount of logging that provides you what you need. Unfortunately, kextload does not return specific error codes for different failures (there is already an enhancement request filed for this) so looking at the output is the only way to determine what went wrong. - Dean This email sent to site_archiver(a)lists.apple.com

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Question on capacity parameter for CF mutable collection
by j o a r 11 Apr '05

11 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hello, Compare this with the method used to create a NSMutableArray: j o a r _______________________________________________ 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'm sorry if this question is off-topic for this list. Darwin contains parts of CF, and there is no specific CF list, so perhaps it's on topic... I have a hopefully simple API question. Consider the function used to create a CFMutableArray (as an example of a mutable collection, the other mutable collections in CF are implemented in the same way): ========================================================= CFMutableArrayRef CFArrayCreateMutable ( CFAllocatorRef allocator, CFIndex capacity, const CFArrayCallBacks *callBacks ); ========================================================= capacity The maximum number of values that can be contained by the CFArray. The array starts empty and can grow to this number of values (and it can have less). If this parameter is 0, the array’s maximum capacity is unlimited (or rather, only limited by address space and available memory constraints). If this parameter is negative, the behavior is undefined. ========================================================= ========================================================= - (id)initWithCapacity:(unsigned)numItems Initializes a newly allocated array, giving it enough memory to hold numItems objects. Mutable arrays expand as needed, so numItems simply establishes the object’s initial capacity. Returns an initialized object, which might be different than the original receiver. ========================================================= Note the difference between how the capacity parameters are used. I can see why you for performance reasons would like to be able to "hint" at the number of objects that's going to be added to a mutable collection, and I don't quite see why the mutable CF collections doesn't allow this? Why would you like to set a max limit for a mutable collection? Why is it not possible to hint at the required capacity? smime.p7s

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Getting info about status of a kernel extension
by Martin Bestmann 11 Apr '05

11 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi, Thanks, Martin _______________________________________________ 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… I like to get the info (via an API) if a specific kernel extension is loaded or not loaded. In case if it is not loaded why it wasn't loaded (e.g. wrong dependencies or authentication errors because of incorrect permission). I like to write a quick user client application to better troubleshoot why a kernel extension wouldn't load at the customer. This email sent to site_archiver(a)lists.apple.com

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Re: cyrus-imapd/sasl on MacOS X 10.3.8: hang
by Charles Bailey 10 Apr '05

10 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:references; b=HpIUE/LGEc6aJ1ikiJ4eMVh8ZMR0UHQhV7g/Ii8xy7bxHEvVvSxpcbe40TJ3nvDrp/5vkUZIPi4y1P/6iDlHHZkz0FTkjnKIwbYn2iuPTTqX5GcAeD93nkekfArxupjrXj4cgquklAfkGi6titBPvnHAyihhBVp67qaO4sDmWC8= On Mar 17, 2005 1:12 PM, Charles Bailey <bailey.charles(a)gmail.com> wrote: Some follow-up info, in case it triggers a thought . . . > OS: Darwin my.host.name 7.8.0 Darwin Kernel Version 7.8.0: Wed Dec 22 > 14:26:17 PST 2004; root:xnu/xnu-517.11.1.obj~1/RELEASE_PPC Power > Macintosh powerpc > > Prior services running (for some time without problems): OpenSSH, Apache, MySQL Using Apple-supplied SASLv2 libs with C headers and saslauthd built from cyrus-sasl 2.1.20 distribution saslauthd started with -a pam -n0; testsaslauthd runs fine Built cyrus imapd 2.2.12 from source (hacking config* to treat 'Darwin' like 'Rhapsody' and various C source files to skip sys/msg.h) with ./configure --with-pidfile=/var/run/cyrus/cyrus-master.pid \ --with-cyrus-prefix=/usr/local/cyrus \ --with-cyrus-user=cyrus --with-cyrus-group=mail \ --enable-listext --enable-gssapi \ --with-bdb=/usr/local/BerkeleyDB.4.3/ --with-openssl \ --with-sasl=/usr \ --with-perl=/usr/local/bin/perl --with-libwrap --without-snmp and symlinked /usr/cyrus to /usr/local/cyrus. Cyrus master running imaps, pop3s, sieve, and imap to 127.0.0.1. Cyrus imapd working out of /var/imap; imapd.conf includes sasl_pwcheck_method: saslauthd sasl_mech_list: plain still not actually delivering any mail to it. i mtest -t '' -u bailey works fine. Built sendmail 8.3.14 from source with (among other things): APPENDDEF(`conf_sendmail_ENVDEF', `-DSTARTTLS') APPENDDEF(`conf_sendmail_LIBS', `-lssl -lcrypto') APPENDDEF(`conf_sendmail_ENVDEF', `-DSASL=2') define(`confSHAREDLIB_EXT',`.dylib') APPENDDEF(`conf_sendmail_LIBS', `-lsasl2') /usr/lib/sasl2/Sendmail.conf is: pwcheck_method: saslauthd mech_list: plain smtptest -t '' -u bailey works fine. I was able to run sendmail and saslauthd (with no incoming mail other than the nightly cron job output) for about 3 days with no apparent problems, then started cyrus daemons. About 12 hours later, the problem struck again: > the system "hangs": can't > authenticate, can't establish new ssh session or open new terminal > window on console, can't execute commands like "top" or "ps uax" > (though "ps" fine) in existing terminal session, can display static > web page, can do most things in programs already open on console, but > can't launch new ones. Probem clears only with hard reboot. There's a little more info in the logs this time: imapd.log continues to have checkpoint messages from cyrus for the ~6 hours between the symptoms appearing and the reboot. No messages in secure.log or auth.log. In system log, I see messages from cyrus about checkpointing up to the time of the hang only. This is fiollowed by a block of garbage: 402 NULs iamVjdACF hAErHE5TTmF2RGlzcGxheU5hbWVGaWxlUHJvcGVydHmG </data> <string>225</string> <data> BAt0eXBlZHN0cmVhbYED6IQBQISEhAhOU1N0cmluZwGEhAhOU09iamVjdACF hAErGE5TTmF2TW9kRGF0ZUZpbGVQcm9wZXJ0eYY= </data> <string>117</string> </array> <key>NSTableView Sort Ordering NSNavOutlineColumnSettings.v1</key> <array> <data> BAt0eXBlZHN0cmVhbYED6IQBQISEhAhOU1N0cmluZwGEhAhOU09iamVjdACF hAErHE5TTmF2RGlzcGxheU5hbWVGaWxlUHJvcGVydHmG </data> <true/> </array> <key>NSWindow Frame NavigatorWindow</key> <string>187 166 800 798 0 0 1280 1002 </string> </dict> </plist> 1778 NULs then the syslog startup message from the reboot. secure.log has nothing from about 4 hours before the freeze until the reboot, when I see Apr 10 05:59:58 localhost com.apple.SecurityServer: Entering service Apr 10 09:15:58 localhost com.apple.SecurityServer: Engine::authorize: Rule::evalu\ate returned -60008 returning errAuthorizationInternal and sure enough, after the reboot, the machine dropped into the console from loginwindow. If I reboot again after copying the logs, all is well. (Actually, I initially saw two error messages, the first noting the -60008 error, and the second from loginwindow stating that an AuthorizationRef had no associated username. To my shock, both the original and a copy (with a different inode) now have the back end of the error partially overwritten with the "AuthorizationInternal" above and then subsequent normal log messages.) I'm still baffled about the cause of the problem, though now I'm starting to wonder whether there's something up with the disk cache or driver, given the scribbling of what looks like a prefs fragment into the syslog, and the odd persistence of a bad AuthorizationRef across a reboot (???). Does this make sense to anyone, or should I just trash the whole system and reinstall from CD? -- Regards, Charles Bailey Lists: bailey _dot_ charles _at_ gmail _dot_ com Other: bailey _at_ newman _dot_ upenn _dot_ edu _______________________________________________ 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: Dylib Embedded Lib Paths
by Shawn Erickson 10 Apr '05

10 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Apr 10, 2005, at 3:52 AM, Jeshua Lacock wrote: On Apr 9, 2005, at 9:00 PM, Shantonu Sen wrote: Greetings, Thanks for the advice. I think this is his reason for his statement... -Shawn _______________________________________________ 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… You shouldn't be using it. You should be linking your dylibs correctly in the first place, using the -install_name option to gcc. May I ask why you would recommend not using it? "You should be linking your dylibs correctly in the first place, using the -install_name option to gcc." In other word setup your build system to build the dylibs with the correct paths instead and you don't need to the use this tool. I don't think he meant to imply anything wrong with the tool, etc. This email sent to site_archiver(a)lists.apple.com

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Re: Dylib Embedded Lib Paths
by Jeshua Lacock 10 Apr '05

10 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Apr 9, 2005, at 9:00 PM, Shantonu Sen wrote: Greetings, Thanks for the advice. May I ask why you would recommend not using it? Thanks, Jeshua Lacock __________________________ Programmer/Owner Phone: 877.240.1364 http://OpenOSX.com Fax: 415.462.6211 -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ _______________________________________________ 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… You shouldn't be using it. You should be linking your dylibs correctly in the first place, using the -install_name option to gcc. It would be immensely useful at times (and with my limited use so far at it works exactly as I would expect)... This email sent to site_archiver(a)lists.apple.com

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Re: Correction: Serial port arbitration
by Godfrey van der Linden 10 Apr '05

10 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Cheers Godfrey On 04/09/2005, at 5:35 AM, Gregory Weston wrote: On Apr 9, 2005, at 4:21 AM, Dan Bernstein wrote: I had a similar problem with the code. Solved it by turning on the CLOCAL bit in the termios struct's c_cflag field and turning off CCTLS_FLOW and CRTS_IFLOW. Here's my setup code: struct termios options; if ( tcgetattr( fd, &options )==-1 ) { /* throw an exception */ } cfmakeraw(&options); options.c_cc[VMIN] = 1; // characters options.c_cc[VTIME] = 10; // tenths of a second _______________________________________________ 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… CLOCAL is the key to programming the modem when using the tty.* serial line. The idea is that tty.* will block until the carrier detect rises. By definition you can not have a carrier yet, thus you must tell the port not to wait for it, that is what CLOCAL does. Assert CLOCAL before clearing the O_NONBLOCK flag with the fcntl. if ( cfsetspeed( &options, B57600 )==-1 ) // Set 57600 baud { /* throw an exception */ } options.c_cflag |= ( CS8 | CLOCAL ); // Use 8 bit words, ignore status lines if ( tcsetattr( [modemFileHandle fileDescriptor], TCSANOW, &options )==-1 ) { /* throw an exception */ } That looks like a success in my testbed app. I'll try it in the real project later. Thanks very much. This email sent to site_archiver(a)lists.apple.com

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