Question

Does a system call or library exist that would allow my C++ code to use hdiutil on Mac OS X. My code needs to mount an available .dmg file and then manipulate what’s inside.

Answer 1

If you can use Objective-C++, you can use NSTask to run command line tools:

NSTask *task = [[NSTask alloc] init];
[task setLaunchPath: @"/usr/bin/hdiutil"];
[task setArguments:
    [NSArray arrayWithObjects: @"attach", @"/path/to/dmg/file", nil]];
[task launch];
[task waitUntilExit];
if (0 != [task terminationStatus])
    NSLog(@"Mount failed.");
[task release];

If you need to use “plain” C++, you can use system():

if (0 != system("/usr/bin/hdiutil attach /path/to/dmg/file"))
    puts("Mount failed.");

or fork()/exec().

You’ll need to double-check whether hdiutil actually returns 0 for success or not.