Re: Best way to launch command-line program from C++ application
Re: Best way to launch command-line program from C++ application
- Subject: Re: Best way to launch command-line program from C++ application
- From: Jean-Daniel Dupas <email@hidden>
- Date: Fri, 20 Mar 2009 22:06:44 +0100
Le 20 mars 09 à 21:48, David Gagnon a écrit : Hi, Our program is a C++ plug-in for Acrobat. So, we need to launch a command-line program to send HTTP message (sending HTTP message within a plug-in cause many problems). Our small command line program take 1 parameter (path) and return an error value. So, I tried "exec" but it does not work, because Acrobat is multi-process. See this link: http://factor-language.blogspot.com/2007/07/execve-returning-enotsup-on-mac-os-x.html
You should only call exec after a fork call, so that is not an issue and the fact that Acrobat is multithreaded should not have any impact.
The solution is in the link you provided.
pid_t p = fork();
if(p < 0)
{
scream_bloody_murder();
return;
}
if(p == 0) {
execve(whatever);
}
Also, posix_spawn could be a nice choice but it is available in 10.5 only.
So I think that "system" or "popen" are the most credible candidate now.
Have a better/simpler idea?
using Obj-C++ and NSTask to launch the tool.
As this is Foundation only, you don't even have to bother with NSApplicationLoad() and other Cocoa/Carbon integration tricks (except NSAutoReleasePool).
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