xcode - Where does C++ stderr output go in OSX? -


i'm working objective-c++ code launches background process main app. background process has no gui, runs moment, , must run main app useful. means can't attach background process xcode or run stand-alone, need rely on output stderr.

in scenario, should looking find stderr output?

more information in case i'm asking wrong question: using old version of xcode (3.2.6) reasons related age of project i'm maintaining. i'm working on exception handling/reporting code, makes difficult step through code since gdb likes catch exceptions rather letting code it. background process launched when structured exception occurs within main app.

excerpt of results of lsof command on main app, might relevant:

command   pid  user       fd     type  device   size/off  node name <appname> 2788 <username> 0r     chr   3,2           0t0   311 /dev/null   <appname> 2788 <username> 1w     chr   3,2      0t473379   311 /dev/null   <appname> 2788 <username> 2w     chr   3,2     0x6d545f8   311 /dev/null

you can use lsof command figure out particular file descriptor has been redirected:

lsof -a -p <your pid> -d 0,1,2

when background process launched child proccess attached same standard streams parent process. normal cocoa applications default should able see output in console.app under 'all messages' or 'console messages'.

before mountain lion view output of launchd services there, believe since launchd redirects stdout , stderr /dev/null.

this means can't attach background process xcode or run stand-alone

if can run main application xcode should able set debugger attach child processes launches.

the xcode debugger can told wait particular process launch , attach it.


Comments

Post a Comment

Popular posts from this blog

apache - Remove .php and add trailing slash in url using htaccess not loading css -

i have add following code htaccess file removing .php extension , add trailing slash urls. worked fine reduced page loading speed , css code not loading @ all. pages ugly. please help rewriteengine on rewritebase / ## hide .php extension snippet # externally redirect /dir/foo.php /dir/foo rewritecond %{the_request} ^[a-z]{3,}\s([^.]+)\.php [nc] rewriterule ^ %1/ [r,l] # add trailing slash rewritecond %{request_filename} !-f rewritecond %{request_uri} !/$ rewriterule . %{request_uri}/ [l,r=301] # internally forward /dir/foo /dir/foo.php rewritecond %{request_filename} !-d rewritecond %{request_filename}.php -f rewriterule ^(.*?)/?$ $1.php [l] we can rewrite urls using .htaccess files. before writing in .htaccess files need verify kind of server using. can check server adding a <?php phpinfo(); ?> in php page. ensure mod_rewrite module enabled in apache server. can identified checking phpinfo included page. common methods used url rewriting follows ...
Read more

javascript - jQuery show full size image on click -

pretty self explanatory not workking . i want display full image when user click on image... yes know there tons of plugins but i want keep simple. any idea ? css : .full { display: none; width: 500px; height: 500px; margin-left: 100px; margin-top: -300px; position: fixed; background-color: #f00; z-index: 6; } .thumbnail { width: 50px; height: 50px; } html: <img class="thumbnail" src="http://4.bp.blogspot.com/-uhbdp2esxng/txneptvi92i/aaaaaaaaaky/upfqis7zto0/s1600/rihanna-wallpaper.jpg"> jquery: $(document).ready(function() { $('.thumbnail').on('click', function() { var img = $('<img />',{src:this.src,'class':'full'}); $('.full').html(img).show(); console.log('done!'); }); }); try looking how jquery works. $(document).ready(function() { $('.thumbnail').on('click', function(...
Read more