Re: pid vs. Process Serial Number
Re: pid vs. Process Serial Number
- Subject: Re: pid vs. Process Serial Number
- From: Brad Peterson <email@hidden>
- Date: Thu, 21 Sep 2006 08:22:41 -0700 (PDT)
Hi,
I didn't realize that was possible.
The code that constructs the cron entry currently
looks like this:
[[NSString stringWithFormat:@"# name: %@\n0@ \"%@\"
&> /dev/null\n",name,schedule,mstr]
Where would I add the parameters? After name?
Thanks!
--- Chris Suter <email@hidden> wrote:
> Can't you use a parameter that gets passed in when
> run from cron?
>
> On 21/09/2006, at 9:34 PM, Brad Peterson wrote:
>
> > Hi all,
> >
> > I'm trying to determine if my app was launched by
> cron
> > so that I can automate certain actions which would
> > otherwise require interaction.
> >
> > So, I figured I'd use getppid(), convert the
> result to
> > a psn, use that to get the process' name, and then
> > check for "cron".
> >
> > But, I always get a -600 when calling
> > GetProcessForPID().
> >
> > Has anyone used this successfully? Alternatively,
> can
> > anyone suggest a different approach which might
> work
> > better?
> >
> > Thanks! (Code below)
> >
> > B
> >
> > Calling code:
> >
> > pid_t pid = getppid();
> > NSString *strAppName = pidToProcessName(pid);
> >
> > my conversion method:
> >
> > NSString *pidToProcessName(pid_t pid){
> > OSErr err;
> > NSString *processName;
> > NSString *result = [NSString string];
> > ProcessSerialNumber psn;
> > psn.highLongOfPSN = 0;
> > psn.lowLongOfPSN = 0;
> > err = GetProcessForPID(pid, &psn);
> > if (err == noErr) {
> > //Get name as CFString, which is bridged
> to
> > NSString
> > CopyProcessName(&psn, (CFStringRef
> > *)&processName);
> > [processName autorelease];
> > result = [NSString stringWithString:
> processName];
> > NSLog(result);
> > }
> > return result;
> > }
> >
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