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Top Forums Programming Control multiple program instances - open multiple files problem Post 302494149 by hakermania on Saturday 5th of February 2011 04:28:39 PM
Old 02-05-2011
Network Control multiple program instances - open multiple files problem

Hello. This shouldn't be an unusual problem, but I cannot find anything about it at google or at other search machine.

So, I've made an application using C++ and QtCreator. I 've made a new mime type for application's project files.
My system (ubuntu 10.10), when I right click a file and I choose "Open With 'Default Application'" the it runs
Code:
default_application path/to/the/selected/file1

So, if you select multiple files and select "Open With 'Default Application'" the system will call
Code:
default_application path/to/the/selected/file1
default_application path/to/the/selected/file2
default_application path/to/the/selected/file3

So, this is a big problem for me, because I handle the concurrent processes from inside the program, so when another instance of the program is running, a warning message is appeared. So, each application's call will recognize the others as currently running applications and so it'll show the message. I'll end up with 3 Messages saying that another process of the program is running --_--'
My application handles multiple URLs this way:
Code:
myapp path/to/the/selected/file1 path/to/the/selected/file2 path/to/the/selected/file3

How can I make my code handle all these multiple instances at the same time? Everything I've tried fails, because everything I've tried requires a check from the first instance called, which is too slow and other instances come app and all together are warning about concurrent processes of the same program SmilieSmilieSmilie

So, how can I fix this? is it system depended, or can I do something with the code?
 

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MIMEOPEN(1p)						User Contributed Perl Documentation					      MIMEOPEN(1p)

NAME
mimeopen - Open files by mimetype SYNOPSIS
mimeopen [options] [-] files DESCRIPTION
This script tries to determine the mimetype of a file and open it with the default desktop application. If no default application is configured the user is prompted with an "open with" menu in the terminal. To use this script you need the freedestop mime-info database and the freedesktop desktop-file-utils package. See File::MimeInfo::Applications(3) for more details. OPTIONS
-a, --ask Do not execute the default application but ask which application to run. This does not change the default application. -d, --ask-default Let the user choose a new default program for given files. -n, --no-ask Don't ask the user which program to use. Choose the default program or the first program known to handle the file mimetype. This does not set the default application. -M, --magic-only Do not check for extensions, globs or inode type, only look at the content of the file. This is particularly useful if for some reason you don't trust the name or the extension a file has. --database=mimedir:mimedir:... Force the program to look in these directories for the shared mime-info database. The directories specified by the basedir specification are ignored. -D, --debug Print debug information about how the mimetype was determined. -h, --help -u, --usage Print a help message and exits. -v, --version Print the version of the program and exit. DEPRECATED OPTIONS
-L, --dereference Follow symbolic links. Deprecated because this is the logical default for this command. Ignored silently. BUGS
No known bugs, please mail the author if you find one. See File::MimeInfo::Applications(3) and File::DesktopEntry(3) for some limitations. AUTHOR
Jaap Karssenberg <pardus@cpan.org> COPYRIGHT
Copyright (c) 2002, 2012 Jaap G Karssenberg. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. SEE ALSO
mimetype(1), update-mime-database(1), update-desktop-database(1), File::MimeInfo(3), File::MimeInfo::Applications(3) perl v5.14.2 2012-01-05 MIMEOPEN(1p)
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