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Re: [Q] Determining startup volume
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Re: [Q] Determining startup volume


  • Subject: Re: [Q] Determining startup volume
  • From: Chris Ridd <email@hidden>
  • Date: Sat, 19 Oct 2002 09:52:18 +0100

On 19/10/02 8:17 am, Mark de Jong <email@hidden> wrote:

> Hi!
>
> Is there a way to determine if a given path or URL is on the startup
> volume? I saw the "mountedLocalVolumePaths" and
> "mountedRemoveableMedia" messages in "NSWorkspace", however, they don't
> seem to be exactly what I'm looking for.
>
> The best solution would be to limit an "NSOpenPanel" to the startup
> volume, but I'm not sure how to determine if a given path is on the
> startup volume.
>
> Any suggestions? I didn't see anything in NSURL, either ... but I could
> have missed it.

Try the POSIX API. Use stat to get the device number (st_dev) for "/" (I
think that equates to your startup volume) and your given path. If they're
on the same device the device numbers should be the same. If not...

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>

int main(int argc, char **argv)
{
struct stat sb;

if (argc != 2) {
fprintf(stderr, "Usage: %s filename\n", argv[0]);
return 1;
}

if (stat("/", &sb) == 0) {
printf("/ device is %ld\n", (long)(sb.st_dev));
}
if (stat(argv[1], &sb) == 0) {
printf("%s device is %ld\n", argv[1], (long)(sb.st_dev));
}
return 0;
}

Cheers,

Chris
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References: 
 >[Q] Determining startup volume (From: Mark de Jong <email@hidden>)

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