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

Unicode string(3) library?
by David Hoerl 13 Apr '05

13 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Does such a thing exist? Am I missing something obvious (if so sorry!) David _______________________________________________ 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 am looking for a version of the string(3) library, but adapted for Unicode strings. [Ifound CFString but not clear if there is a one to one mapping of CFString functionality to string(3) functionality.] This email sent to site_archiver(a)lists.apple.com

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Re: Compiler Settings
by Matt Watson 13 Apr '05

13 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Apr 13, 2005, at 9:53 AM, Steven J Abner wrote: matt. _______________________________________________ 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… Sorry if this has been covered before, but can't find it, sooo... I'm trying to compare oranges to "apple's", and would like to know, when Darwin(Unix) ships from Apple, what is the compiler setting. Do they use "-O", "-O2", "-O3" or "-Os" ? It depends. Many of the makefiles use -Os to reduce memory footprint, which is generally a performance win system-wide. Run-time performance sensitive code may choose to use -O2 or -O3. Most of the time, for open source projects, the optimization flags have been determined by the primary developers already. This email sent to site_archiver(a)lists.apple.com

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Re: Compiler Settings
by Justin Walker 13 Apr '05

13 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Apr 13, 2005, at 9:53, Steven J Abner wrote: Does this help? Regards, Justin -- Justin C. Walker, Curmudgeon at Large Institute for General Semantics ----------- My wife 'n kids 'n dog are gone, I can't get Jesus on the phone, But Ol' Milwaukee's Best is my best friend. ----------- _______________________________________________ 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… Sorry if this has been covered before, but can't find it, sooo... I'm trying to compare oranges to "apple's", and would like to know, when Darwin(Unix) ships from Apple, what is the compiler setting. Do they use "-O", "-O2", "-O3" or "-Os" ? I'm not sure what you mean by "the compiler setting", but Apple uses gcc, and the compiler configuration is controlled, I believe, by the "specs" file. Gcc will tell you what file it's using if you run "gcc -v". This email sent to site_archiver(a)lists.apple.com

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RE: Calling a Command line tool from an application
by David Hoerl 13 Apr '05

13 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: Can anybody point me to docs which explain calling a command line tool from an application an providing it argumetns? You used the word "application" - is this a GUI based app? You may want to also look at NSPipe and NSFileHandle too. David _______________________________________________ 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… If you are using Cocoa or even just Obj-C you can use the Foundation classes NSProcessInfo and NSTask. These handle some of the details of fork/exec for you. This email sent to site_archiver(a)lists.apple.com

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Compiler Settings
by Steven J Abner 13 Apr '05

13 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Sorry if this has been covered before, but can't find it, sooo... I'm trying to compare oranges to "apple's", and would like to know, when Darwin(Unix) ships from Apple, what is the compiler setting. Do they use "-O", "-O2", "-O3" or "-Os" ? Thanx, Steven _______________________________________________ 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: Calling a Command line tool from an application
by Michael B Allen 13 Apr '05

13 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Tue, 12 Apr 2005 16:40:20 -0600 Kevin Harris <kharris(a)vintela.com> wrote: > In any case, the man pages for fork(2), pipe(2), close(2), dup2(2), > exec(3), and wait(2) should all come in handy. For twiddling the > close-on-exec behavior, the fcntl(2) man page (F_GETFD and F_SETFD) will Actually I think it would be easier to use forkpty. That is also the only way to ensure the program will behave as it would on the commandline. It's also the only way to run something that requires interactive control. Mike -- IRC - where men are men, women are men, and the boys are FBI agents. _______________________________________________ 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: Calling a Command line tool from an application
by Justin Walker 12 Apr '05

12 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Apr 12, 2005, at 16:37, Dave Rehring wrote: Can anybody point me to docs which explain calling a command line tool from an application an providing it argumetns? Valid issues, all. It will likely be MUCH easier to search for a library that handles all of the gory details for you. Modulo that procedure's coping with security issues. Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- Some people have a mental horizon of radius zero, and call it their point of view. -- David Hilbert -------- _______________________________________________ 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 4/12/05 3:40 PM, Kevin Harris at kharris(a)vintela.com wrote: Tommy Nordgren wrote: Apr 11, 2005 kl. 11:26 PM skrev Justin Walker: On Apr 11, 2005, at 14:17, Rick Steele wrote: [snip] There are other issues to consider as well. Signal masks, file descriptors (if the close-on-exec flag is not set), etc. will all be inherited by the executed process. It may be necessary to reset the signal masks and close those files in the child process after doing the initial fork. If the output of the program is required, a pipe will need to be created to read(2) stdout from the child process. Things become even more hairy if you want the parent process to terminate the child after some maximum delay time. In any case, the man pages for fork(2), pipe(2), close(2), dup2(2), exec(3), and wait(2) should all come in handy. For twiddling the close-on-exec behavior, the fcntl(2) man page (F_GETFD and F_SETFD) will also be useful. You can check http://www.opengroup.org/onlinepubs/009695399/ for more information about each of these system calls; there are some things documented there that you may not catch in the man pages. Am I misunderstanding the problem, but the NSTask Objective-C class seems exactly on point. It should even be usable if the person is doing development using Carbon... It should be WAY easier than any of the other methods described here. The OP is using Carbon, and this might work (I know sufficiently little about NSAnything that I have no clue :-}) This email sent to site_archiver(a)lists.apple.com

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Re: Calling a Command line tool from an application
by Dave Rehring 12 Apr '05

12 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Microsoft-Entourage/11.1.0.040913 On 4/12/05 3:40 PM, Kevin Harris at kharris(a)vintela.com wrote: > Tommy Nordgren wrote: > >> >> Apr 11, 2005 kl. 11:26 PM skrev Justin Walker: >> >>> >>> On Apr 11, 2005, at 14:17, Rick Steele wrote: >>> >>>> Can anybody point me to docs which explain calling a command line >>>> tool from an application an providing it argumetns? >>> >>> >>> 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 >>> >>> 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. > > There are other issues to consider as well. Signal masks, file > descriptors (if the close-on-exec flag is not set), etc. will all be > inherited by the executed process. It may be necessary to reset the > signal masks and close those files in the child process after doing the > initial fork. If the output of the program is required, a pipe will > need to be created to read(2) stdout from the child process. Things > become even more hairy if you want the parent process to terminate the > child after some maximum delay time. > > In any case, the man pages for fork(2), pipe(2), close(2), dup2(2), > exec(3), and wait(2) should all come in handy. For twiddling the > close-on-exec behavior, the fcntl(2) man page (F_GETFD and F_SETFD) will > also be useful. You can check > http://www.opengroup.org/onlinepubs/009695399/ for more information > about each of these system calls; there are some things documented there > that you may not catch in the man pages. > > It will likely be MUCH easier to search for a library that handles all > of the gory details for you. > > -Kevin- Am I misunderstanding the problem, but the NSTask Objective-C class seems exactly on point. It should even be usable if the person is doing development using Carbon... It should be WAY easier than any of the other methods described here. Later, -- David Rehring Psychos do not explode when light hits VP of Research and Development them, no matter how crazy they are... Atimi Software, Inc. www.atimi.com And totally insane guy! _______________________________________________ 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: Calling a Command line tool from an application
by Kevin Harris 12 Apr '05

12 Apr '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Mozilla Thunderbird 1.0 (X11/20041206) Tommy Nordgren wrote: 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 -Kevin- _______________________________________________ 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. There are other issues to consider as well. Signal masks, file descriptors (if the close-on-exec flag is not set), etc. will all be inherited by the executed process. It may be necessary to reset the signal masks and close those files in the child process after doing the initial fork. If the output of the program is required, a pipe will need to be created to read(2) stdout from the child process. Things become even more hairy if you want the parent process to terminate the child after some maximum delay time. In any case, the man pages for fork(2), pipe(2), close(2), dup2(2), exec(3), and wait(2) should all come in handy. For twiddling the close-on-exec behavior, the fcntl(2) man page (F_GETFD and F_SETFD) will also be useful. You can check http://www.opengroup.org/onlinepubs/009695399/ for more information about each of these system calls; there are some things documented there that you may not catch in the man pages. It will likely be MUCH easier to search for a library that handles all of the gory details for you. This email sent to site_archiver(a)lists.apple.com

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Re: Overwhelming Disk Cache?
by Charles Jolley 12 Apr '05

12 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… This email sent to site_archiver(a)lists.apple.com

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