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PFMoveApplication.m
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PFMoveApplication.m
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//
// PFMoveApplication.m, version 1.25
// LetsMove
//
// Created by Andy Kim at Potion Factory LLC on 9/17/09
//
// The contents of this file are dedicated to the public domain.
#import "PFMoveApplication.h"
#import <AppKit/AppKit.h>
#import <Security/Security.h>
#import <dlfcn.h>
#import <sys/mount.h>
@interface LetsMove : NSObject
@end
@implementation LetsMove
+ (NSBundle *)bundle {
return [NSBundle bundleForClass:self];
}
@end
// Strings
// These are macros to be able to use custom i18n tools
#define _I10NS(nsstr) NSLocalizedStringFromTableInBundle(nsstr, @"MoveApplication", [LetsMove bundle], nil)
#define kStrMoveApplicationCouldNotMove _I10NS(@"Could not move to Applications folder")
#define kStrMoveApplicationQuestionTitle _I10NS(@"Move to Applications folder?")
#define kStrMoveApplicationQuestionTitleHome _I10NS(@"Move to Applications folder in your Home folder?")
#define kStrMoveApplicationQuestionMessage _I10NS(@"I can move myself to the Applications folder if you'd like.")
#define kStrMoveApplicationButtonMove _I10NS(@"Move to Applications Folder")
#define kStrMoveApplicationButtonDoNotMove _I10NS(@"Do Not Move")
#define kStrMoveApplicationQuestionInfoWillRequirePasswd _I10NS(@"Note that this will require an administrator password.")
#define kStrMoveApplicationQuestionInfoInDownloadsFolder _I10NS(@"This will keep your Downloads folder uncluttered.")
// Needs to be defined for compiling under 10.5 SDK
#ifndef NSAppKitVersionNumber10_5
#define NSAppKitVersionNumber10_5 949
#endif
// By default, we use a small control/font for the suppression button.
// If you prefer to use the system default (to match your other alerts),
// set this to 0.
#define PFUseSmallAlertSuppressCheckbox 1
static NSString *AlertSuppressKey = @"moveToApplicationsFolderAlertSuppress";
static BOOL MoveInProgress = NO;
// Helper functions
static NSString *PreferredInstallLocation(BOOL *isUserDirectory);
static BOOL IsInApplicationsFolder(NSString *path);
static BOOL IsInDownloadsFolder(NSString *path);
static BOOL IsApplicationAtPathRunning(NSString *path);
static BOOL IsApplicationAtPathNested(NSString *path);
static NSString *ContainingDiskImageDevice(NSString *path);
static BOOL Trash(NSString *path);
static BOOL DeleteOrTrash(NSString *path);
static BOOL AuthorizedInstall(NSString *srcPath, NSString *dstPath, BOOL *canceled);
static BOOL CopyBundle(NSString *srcPath, NSString *dstPath);
static NSString *ShellQuotedString(NSString *string);
static void Relaunch(NSString *destinationPath);
// Main worker function
void PFMoveToApplicationsFolderIfNecessary(void) {
// Make sure to do our work on the main thread.
// Apparently Electron apps need this for things to work properly.
if (![NSThread isMainThread]) {
dispatch_async(dispatch_get_main_queue(), ^{
PFMoveToApplicationsFolderIfNecessary();
});
return;
}
// Skip if user suppressed the alert before
if ([[NSUserDefaults standardUserDefaults] boolForKey:AlertSuppressKey]) return;
// Path of the bundle
NSString *bundlePath = [[NSBundle mainBundle] bundlePath];
// Check if the bundle is embedded in another application
BOOL isNestedApplication = IsApplicationAtPathNested(bundlePath);
// Skip if the application is already in some Applications folder,
// unless it's inside another app's bundle.
if (IsInApplicationsFolder(bundlePath) && !isNestedApplication) return;
// OK, looks like we'll need to do a move - set the status variable appropriately
MoveInProgress = YES;
// File Manager
NSFileManager *fm = [NSFileManager defaultManager];
// Are we on a disk image?
NSString *diskImageDevice = ContainingDiskImageDevice(bundlePath);
// Since we are good to go, get the preferred installation directory.
BOOL installToUserApplications = NO;
NSString *applicationsDirectory = PreferredInstallLocation(&installToUserApplications);
NSString *bundleName = [bundlePath lastPathComponent];
NSString *destinationPath = [applicationsDirectory stringByAppendingPathComponent:bundleName];
// Check if we need admin password to write to the Applications directory
BOOL needAuthorization = ([fm isWritableFileAtPath:applicationsDirectory] == NO);
// Check if the destination bundle is already there but not writable
needAuthorization |= ([fm fileExistsAtPath:destinationPath] && ![fm isWritableFileAtPath:destinationPath]);
// Setup the alert
NSAlert *alert = [[[NSAlert alloc] init] autorelease];
{
NSString *informativeText = nil;
[alert setMessageText:(installToUserApplications ? kStrMoveApplicationQuestionTitleHome : kStrMoveApplicationQuestionTitle)];
informativeText = kStrMoveApplicationQuestionMessage;
if (needAuthorization) {
informativeText = [informativeText stringByAppendingString:@" "];
informativeText = [informativeText stringByAppendingString:kStrMoveApplicationQuestionInfoWillRequirePasswd];
}
else if (IsInDownloadsFolder(bundlePath)) {
// Don't mention this stuff if we need authentication. The informative text is long enough as it is in that case.
informativeText = [informativeText stringByAppendingString:@" "];
informativeText = [informativeText stringByAppendingString:kStrMoveApplicationQuestionInfoInDownloadsFolder];
}
[alert setInformativeText:informativeText];
// Add accept button
[alert addButtonWithTitle:kStrMoveApplicationButtonMove];
// Add deny button
NSButton *cancelButton = [alert addButtonWithTitle:kStrMoveApplicationButtonDoNotMove];
[cancelButton setKeyEquivalent:[NSString stringWithFormat:@"%C", 0x1b]]; // Escape key
// Setup suppression button
[alert setShowsSuppressionButton:YES];
if (PFUseSmallAlertSuppressCheckbox) {
NSCell *cell = [[alert suppressionButton] cell];
[cell setControlSize:NSSmallControlSize];
[cell setFont:[NSFont systemFontOfSize:[NSFont smallSystemFontSize]]];
}
}
// Activate app -- work-around for focus issues related to "scary file from internet" OS dialog.
if (![NSApp isActive]) {
[NSApp activateIgnoringOtherApps:YES];
}
if ([alert runModal] == NSAlertFirstButtonReturn) {
NSLog(@"INFO -- Moving myself to the Applications folder");
// Move
if (needAuthorization) {
BOOL authorizationCanceled;
if (!AuthorizedInstall(bundlePath, destinationPath, &authorizationCanceled)) {
if (authorizationCanceled) {
NSLog(@"INFO -- Not moving because user canceled authorization");
MoveInProgress = NO;
return;
}
else {
NSLog(@"ERROR -- Could not copy myself to /Applications with authorization");
goto fail;
}
}
}
else {
// If a copy already exists in the Applications folder, put it in the Trash
if ([fm fileExistsAtPath:destinationPath]) {
// But first, make sure that it's not running
if (IsApplicationAtPathRunning(destinationPath)) {
// Give the running app focus and terminate myself
NSLog(@"INFO -- Switching to an already running version");
[[NSTask launchedTaskWithLaunchPath:@"/usr/bin/open" arguments:[NSArray arrayWithObject:destinationPath]] waitUntilExit];
MoveInProgress = NO;
exit(0);
}
else {
if (!Trash([applicationsDirectory stringByAppendingPathComponent:bundleName]))
goto fail;
}
}
if (!CopyBundle(bundlePath, destinationPath)) {
NSLog(@"ERROR -- Could not copy myself to %@", destinationPath);
goto fail;
}
}
// Trash the original app. It's okay if this fails.
// NOTE: This final delete does not work if the source bundle is in a network mounted volume.
// Calling rm or file manager's delete method doesn't work either. It's unlikely to happen
// but it'd be great if someone could fix this.
if (!isNestedApplication && diskImageDevice == nil && !DeleteOrTrash(bundlePath)) {
NSLog(@"WARNING -- Could not delete application after moving it to Applications folder");
}
// Relaunch.
Relaunch(destinationPath);
// Launched from within a disk image? -- unmount (if no files are open after 5 seconds,
// otherwise leave it mounted).
if (diskImageDevice && !isNestedApplication) {
NSString *script = [NSString stringWithFormat:@"(/bin/sleep 5 && /usr/bin/hdiutil detach %@) &", ShellQuotedString(diskImageDevice)];
[NSTask launchedTaskWithLaunchPath:@"/bin/sh" arguments:[NSArray arrayWithObjects:@"-c", script, nil]];
}
MoveInProgress = NO;
exit(0);
}
// Save the alert suppress preference if checked
else if ([[alert suppressionButton] state] == NSOnState) {
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:AlertSuppressKey];
}
MoveInProgress = NO;
return;
fail:
{
// Show failure message
alert = [[[NSAlert alloc] init] autorelease];
[alert setMessageText:kStrMoveApplicationCouldNotMove];
[alert runModal];
MoveInProgress = NO;
}
}
BOOL PFMoveIsInProgress() {
return MoveInProgress;
}
#pragma mark -
#pragma mark Helper Functions
static NSString *PreferredInstallLocation(BOOL *isUserDirectory) {
// Return the preferred install location.
// Assume that if the user has a ~/Applications folder, they'd prefer their
// applications to go there.
NSFileManager *fm = [NSFileManager defaultManager];
NSArray *userApplicationsDirs = NSSearchPathForDirectoriesInDomains(NSApplicationDirectory, NSUserDomainMask, YES);
if ([userApplicationsDirs count] > 0) {
NSString *userApplicationsDir = [userApplicationsDirs objectAtIndex:0];
BOOL isDirectory;
if ([fm fileExistsAtPath:userApplicationsDir isDirectory:&isDirectory] && isDirectory) {
// User Applications directory exists. Get the directory contents.
NSArray *contents = [fm contentsOfDirectoryAtPath:userApplicationsDir error:NULL];
// Check if there is at least one ".app" inside the directory.
for (NSString *contentsPath in contents) {
if ([[contentsPath pathExtension] isEqualToString:@"app"]) {
if (isUserDirectory) *isUserDirectory = YES;
return [userApplicationsDir stringByResolvingSymlinksInPath];
}
}
}
}
// No user Applications directory in use. Return the machine local Applications directory
if (isUserDirectory) *isUserDirectory = NO;
return [[NSSearchPathForDirectoriesInDomains(NSApplicationDirectory, NSLocalDomainMask, YES) lastObject] stringByResolvingSymlinksInPath];
}
static BOOL IsInApplicationsFolder(NSString *path) {
// Check all the normal Application directories
NSArray *applicationDirs = NSSearchPathForDirectoriesInDomains(NSApplicationDirectory, NSAllDomainsMask, YES);
for (NSString *appDir in applicationDirs) {
if ([path hasPrefix:appDir]) return YES;
}
// Also, handle the case that the user has some other Application directory (perhaps on a separate data partition).
if ([[path pathComponents] containsObject:@"Applications"]) return YES;
return NO;
}
static BOOL IsInDownloadsFolder(NSString *path) {
NSArray *downloadDirs = NSSearchPathForDirectoriesInDomains(NSDownloadsDirectory, NSAllDomainsMask, YES);
for (NSString *downloadsDirPath in downloadDirs) {
if ([path hasPrefix:downloadsDirPath]) return YES;
}
return NO;
}
static BOOL IsApplicationAtPathRunning(NSString *bundlePath) {
bundlePath = [bundlePath stringByStandardizingPath];
#if MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_5
// Use the new API on 10.6 or higher to determine if the app is already running
if (floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_5) {
for (NSRunningApplication *runningApplication in [[NSWorkspace sharedWorkspace] runningApplications]) {
NSString *runningAppBundlePath = [[[runningApplication bundleURL] path] stringByStandardizingPath];
if ([runningAppBundlePath isEqualToString:bundlePath]) {
return YES;
}
}
return NO;
}
#endif
// Use the shell to determine if the app is already running on systems 10.5 or lower
NSString *script = [NSString stringWithFormat:@"/bin/ps ax -o comm | /usr/bin/grep %@/ | /usr/bin/grep -v grep >/dev/null", ShellQuotedString(bundlePath)];
NSTask *task = [NSTask launchedTaskWithLaunchPath:@"/bin/sh" arguments:[NSArray arrayWithObjects:@"-c", script, nil]];
[task waitUntilExit];
// If the task terminated with status 0, it means that the final grep produced 1 or more lines of output.
// Which means that the app is already running
return [task terminationStatus] == 0;
}
static BOOL IsApplicationAtPathNested(NSString *path) {
NSString *containingPath = [path stringByDeletingLastPathComponent];
NSArray *components = [containingPath pathComponents];
for (NSString *component in components) {
if ([[component pathExtension] isEqualToString:@"app"]) {
return YES;
}
}
return NO;
}
static NSString *ContainingDiskImageDevice(NSString *path) {
NSString *containingPath = [path stringByDeletingLastPathComponent];
struct statfs fs;
if (statfs([containingPath fileSystemRepresentation], &fs) || (fs.f_flags & MNT_ROOTFS))
return nil;
NSString *device = [[NSFileManager defaultManager] stringWithFileSystemRepresentation:fs.f_mntfromname length:strlen(fs.f_mntfromname)];
NSTask *hdiutil = [[[NSTask alloc] init] autorelease];
[hdiutil setLaunchPath:@"/usr/bin/hdiutil"];
[hdiutil setArguments:[NSArray arrayWithObjects:@"info", @"-plist", nil]];
[hdiutil setStandardOutput:[NSPipe pipe]];
[hdiutil launch];
[hdiutil waitUntilExit];
NSData *data = [[[hdiutil standardOutput] fileHandleForReading] readDataToEndOfFile];
NSDictionary *info = nil;
#if MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_5
if (floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_5) {
info = [NSPropertyListSerialization propertyListWithData:data options:NSPropertyListImmutable format:NULL error:NULL];
}
else {
#endif
#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
info = [NSPropertyListSerialization propertyListFromData:data mutabilityOption:NSPropertyListImmutable format:NULL errorDescription:NULL];
#endif
#if MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_5
}
#endif
if (![info isKindOfClass:[NSDictionary class]]) return nil;
NSArray *images = (NSArray *)[info objectForKey:@"images"];
if (![images isKindOfClass:[NSArray class]]) return nil;
for (NSDictionary *image in images) {
if (![image isKindOfClass:[NSDictionary class]]) return nil;
id systemEntities = [image objectForKey:@"system-entities"];
if (![systemEntities isKindOfClass:[NSArray class]]) return nil;
for (NSDictionary *systemEntity in systemEntities) {
if (![systemEntity isKindOfClass:[NSDictionary class]]) return nil;
NSString *devEntry = [systemEntity objectForKey:@"dev-entry"];
if (![devEntry isKindOfClass:[NSString class]]) return nil;
if ([devEntry isEqualToString:device])
return device;
}
}
return nil;
}
static BOOL Trash(NSString *path) {
BOOL result = NO;
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_8
if (floor(NSAppKitVersionNumber) >= NSAppKitVersionNumber10_8) {
result = [[NSFileManager defaultManager] trashItemAtURL:[NSURL fileURLWithPath:path] resultingItemURL:NULL error:NULL];
}
#endif
#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_11
if (!result) {
result = [[NSWorkspace sharedWorkspace] performFileOperation:NSWorkspaceRecycleOperation
source:[path stringByDeletingLastPathComponent]
destination:@""
files:[NSArray arrayWithObject:[path lastPathComponent]]
tag:NULL];
}
#endif
// As a last resort try trashing with AppleScript.
// This allows us to trash the app in macOS Sierra even when the app is running inside
// an app translocation image.
if (!result) {
NSAppleScript *appleScript = [[[NSAppleScript alloc] initWithSource:
[NSString stringWithFormat:@"\
set theFile to POSIX file \"%@\" \n\
tell application \"Finder\" \n\
move theFile to trash \n\
end tell", path]] autorelease];
NSDictionary *errorDict = nil;
NSAppleEventDescriptor *scriptResult = [appleScript executeAndReturnError:&errorDict];
if (scriptResult == nil) {
NSLog(@"Trash AppleScript error: %@", errorDict);
}
result = (scriptResult != nil);
}
if (!result) {
NSLog(@"ERROR -- Could not trash '%@'", path);
}
return result;
}
static BOOL DeleteOrTrash(NSString *path) {
NSError *error;
if ([[NSFileManager defaultManager] removeItemAtPath:path error:&error]) {
return YES;
}
else {
// Don't log warning if on Sierra and running inside App Translocation path
if ([path rangeOfString:@"/AppTranslocation/"].location == NSNotFound)
NSLog(@"WARNING -- Could not delete '%@': %@", path, [error localizedDescription]);
return Trash(path);
}
}
static BOOL AuthorizedInstall(NSString *srcPath, NSString *dstPath, BOOL *canceled) {
if (canceled) *canceled = NO;
// Make sure that the destination path is an app bundle. We're essentially running 'sudo rm -rf'
// so we really don't want to fuck this up.
if (![[dstPath pathExtension] isEqualToString:@"app"]) return NO;
// Do some more checks
if ([[dstPath stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]] length] == 0) return NO;
if ([[srcPath stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]] length] == 0) return NO;
int pid, status;
AuthorizationRef myAuthorizationRef;
// Get the authorization
OSStatus err = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment, kAuthorizationFlagDefaults, &myAuthorizationRef);
if (err != errAuthorizationSuccess) return NO;
AuthorizationItem myItems = {kAuthorizationRightExecute, 0, NULL, 0};
AuthorizationRights myRights = {1, &myItems};
AuthorizationFlags myFlags = (AuthorizationFlags)(kAuthorizationFlagInteractionAllowed | kAuthorizationFlagExtendRights | kAuthorizationFlagPreAuthorize);
err = AuthorizationCopyRights(myAuthorizationRef, &myRights, NULL, myFlags, NULL);
if (err != errAuthorizationSuccess) {
if (err == errAuthorizationCanceled && canceled)
*canceled = YES;
goto fail;
}
static OSStatus (*security_AuthorizationExecuteWithPrivileges)(AuthorizationRef authorization, const char *pathToTool,
AuthorizationFlags options, char * const *arguments,
FILE **communicationsPipe) = NULL;
if (!security_AuthorizationExecuteWithPrivileges) {
// On 10.7, AuthorizationExecuteWithPrivileges is deprecated. We want to still use it since there's no
// good alternative (without requiring code signing). We'll look up the function through dyld and fail
// if it is no longer accessible. If Apple removes the function entirely this will fail gracefully. If
// they keep the function and throw some sort of exception, this won't fail gracefully, but that's a
// risk we'll have to take for now.
security_AuthorizationExecuteWithPrivileges = (OSStatus (*)(AuthorizationRef, const char*,
AuthorizationFlags, char* const*,
FILE **)) dlsym(RTLD_DEFAULT, "AuthorizationExecuteWithPrivileges");
}
if (!security_AuthorizationExecuteWithPrivileges) goto fail;
// Delete the destination
{
char *args[] = {"-rf", (char *)[dstPath fileSystemRepresentation], NULL};
err = security_AuthorizationExecuteWithPrivileges(myAuthorizationRef, "/bin/rm", kAuthorizationFlagDefaults, args, NULL);
if (err != errAuthorizationSuccess) goto fail;
// Wait until it's done
pid = wait(&status);
if (pid == -1 || !WIFEXITED(status)) goto fail; // We don't care about exit status as the destination most likely does not exist
}
// Copy
{
char *args[] = {"-pR", (char *)[srcPath fileSystemRepresentation], (char *)[dstPath fileSystemRepresentation], NULL};
err = security_AuthorizationExecuteWithPrivileges(myAuthorizationRef, "/bin/cp", kAuthorizationFlagDefaults, args, NULL);
if (err != errAuthorizationSuccess) goto fail;
// Wait until it's done
pid = wait(&status);
if (pid == -1 || !WIFEXITED(status) || WEXITSTATUS(status)) goto fail;
}
AuthorizationFree(myAuthorizationRef, kAuthorizationFlagDefaults);
return YES;
fail:
AuthorizationFree(myAuthorizationRef, kAuthorizationFlagDefaults);
return NO;
}
static BOOL CopyBundle(NSString *srcPath, NSString *dstPath) {
NSFileManager *fm = [NSFileManager defaultManager];
NSError *error = nil;
if ([fm copyItemAtPath:srcPath toPath:dstPath error:&error]) {
return YES;
}
else {
NSLog(@"ERROR -- Could not copy '%@' to '%@' (%@)", srcPath, dstPath, error);
return NO;
}
}
static NSString *ShellQuotedString(NSString *string) {
return [NSString stringWithFormat:@"'%@'", [string stringByReplacingOccurrencesOfString:@"'" withString:@"'\\''"]];
}
static void Relaunch(NSString *destinationPath) {
// The shell script waits until the original app process terminates.
// This is done so that the relaunched app opens as the front-most app.
int pid = [[NSProcessInfo processInfo] processIdentifier];
// Command run just before running open /final/path
NSString *preOpenCmd = @"";
NSString *quotedDestinationPath = ShellQuotedString(destinationPath);
// OS X >=10.5:
// Before we launch the new app, clear xattr:com.apple.quarantine to avoid
// duplicate "scary file from the internet" dialog.
if (floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_5) {
// Add the -r flag on 10.6
preOpenCmd = [NSString stringWithFormat:@"/usr/bin/xattr -d -r com.apple.quarantine %@", quotedDestinationPath];
}
else {
preOpenCmd = [NSString stringWithFormat:@"/usr/bin/xattr -d com.apple.quarantine %@", quotedDestinationPath];
}
NSString *script = [NSString stringWithFormat:@"(while /bin/kill -0 %d >&/dev/null; do /bin/sleep 0.1; done; %@; /usr/bin/open %@) &", pid, preOpenCmd, quotedDestinationPath];
[NSTask launchedTaskWithLaunchPath:@"/bin/sh" arguments:[NSArray arrayWithObjects:@"-c", script, nil]];
}