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// SUDiskImageUnarchiver.m
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// Created by Andy Matuschak on 6/16/08.
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// Copyright 2008 Andy Matuschak. All rights reserved.
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#import "SUDiskImageUnarchiver.h"
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#import "SUUnarchiver_Private.h"
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#import "NTSynchronousTask.h"
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@implementation SUDiskImageUnarchiver
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+ (BOOL)_canUnarchiveURL:(NSURL *)URL
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return [URL conformsToType:@"public.disk-image"];
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[NSThread detachNewThreadSelector:@selector(_extractDMG) toTarget:self withObject:nil];
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NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
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NSString *archivePath = [archiveURL path];
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BOOL mountedSuccessfully = NO;
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// get a unique mount point path
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NSString *mountPrefix = [@"/Volumes" stringByAppendingPathComponent:[[archivePath lastPathComponent] stringByDeletingPathExtension]];
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NSString *mountPoint = [mountPrefix stringByAppendingString:[[NSProcessInfo processInfo] globallyUniqueString]];
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if ([[NSFileManager defaultManager] fileExistsAtPath:mountPoint]) goto reportError;
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// create mount point folder
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[[NSFileManager defaultManager] createDirectoryAtPath:mountPoint attributes:nil];
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if (![[NSFileManager defaultManager] fileExistsAtPath:mountPoint]) goto reportError;
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NSArray* arguments = [NSArray arrayWithObjects:@"attach", archivePath, @"-mountpoint", mountPoint, @"-noverify", @"-nobrowse", @"-noautoopen", nil];
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// set up a pipe and push "yes" (y works too), this will accept any license agreement crap
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// not every .dmg needs this, but this will make sure it works with everyone
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NSData* yesData = [[[NSData alloc] initWithBytes:"yes\n" length:4] autorelease];
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NSData *result = [NTSynchronousTask task:@"/usr/bin/hdiutil" directory:@"/" withArgs:arguments input:yesData];
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if (!result) goto reportError;
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mountedSuccessfully = YES;
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// Now that we've mounted it, we need to copy out its contents.
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NSString *targetPath = [[archivePath stringByDeletingLastPathComponent] stringByAppendingPathComponent:[mountPoint lastPathComponent]];
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if (![[NSFileManager defaultManager] createDirectoryAtPath:targetPath attributes:nil]) goto reportError;
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// We can't just copyPath: from the volume root because that always fails. Seems to be a bug.
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id subpathEnumerator = [[[NSFileManager defaultManager] directoryContentsAtPath:mountPoint] objectEnumerator], currentSubpath;
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while ((currentSubpath = [subpathEnumerator nextObject]))
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if (![[NSFileManager defaultManager] copyPath:[mountPoint stringByAppendingPathComponent:currentSubpath] toPath:[targetPath stringByAppendingPathComponent:currentSubpath] handler:nil])
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[self performSelectorOnMainThread:@selector(_notifyDelegateOfSuccess) withObject:nil waitUntilDone:NO];
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[self performSelectorOnMainThread:@selector(_notifyDelegateOfFailure) withObject:nil waitUntilDone:NO];
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if (mountedSuccessfully)
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[NSTask launchedTaskWithLaunchPath:@"/usr/bin/hdiutil" arguments:[NSArray arrayWithObjects:@"detach", mountPoint, @"-force", nil]];
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[self _registerImplementation:self];
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SUDiskImageUnarchiver.m
