blob: 2d2f986a3ced040967e8da41efe79260f811614b [file] [log] [blame]
/*
File: LoginItemsAE.c
Contains: Login items manipulation via Apple events.
Copyright: Copyright (c) 2005 by Apple Computer, Inc., All Rights Reserved.
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Change History (most recent first):
$Log: LoginItemsAE.c,v $
Revision 1.1 2005/09/27 12:29:26
First checked in.
*/
/////////////////////////////////////////////////////////////////
// Our prototypes
#include "LoginItemsAE.h"
// System interfaces
// We need to pull in all of Carbon just to get the definition of
// pProperties. *sigh* This is purely a compile-time dependency,
// which is why we include it in the implementation and not the
// header.
#include <Carbon/Carbon.h>
#include <string.h>
/////////////////////////////////////////////////////////////////
#pragma mark ***** Apple event utilities
enum {
kSystemEventsCreator = 'sevs'
};
static OSStatus LaunchSystemEvents(ProcessSerialNumber *psnPtr)
// Launches the "System Events" process.
{
OSStatus err;
FSRef appRef;
assert(psnPtr != NULL);
// Ask Launch Services to find System Events by creator.
err = LSFindApplicationForInfo(
kSystemEventsCreator,
NULL,
NULL,
&appRef,
NULL
);
// Launch it!
if (err == noErr) {
if ( LSOpenApplication != NULL ) {
LSApplicationParameters appParams;
// Do it the easy way on 10.4 and later.
memset(&appParams, 0, sizeof(appParams));
appParams.version = 0;
appParams.flags = kLSLaunchDefaults;
appParams.application = &appRef;
err = LSOpenApplication(&appParams, psnPtr);
} else {
FSSpec appSpec;
LaunchParamBlockRec lpb;
// Do it the compatible way on earlier systems.
// I launch System Events using LaunchApplication, rather than
// Launch Services, because LaunchApplication gives me back
// the ProcessSerialNumber. Unfortunately this requires me to
// get an FSSpec for the application because there's no
// FSRef version of Launch Application.
if (err == noErr) {
err = FSGetCatalogInfo(&appRef, kFSCatInfoNone, NULL, NULL, &appSpec, NULL);
}
if (err == noErr) {
memset(&lpb, 0, sizeof(lpb));
lpb.launchBlockID = extendedBlock;
lpb.launchEPBLength = extendedBlockLen;
lpb.launchControlFlags = launchContinue | launchNoFileFlags;
lpb.launchAppSpec = &appSpec;
err = LaunchApplication(&lpb);
}
if (err == noErr) {
*psnPtr = lpb.launchProcessSN;
}
}
}
return err;
}
static OSStatus FindSystemEvents(ProcessSerialNumber *psnPtr)
// Finds the "System Events" process or, if it's not
// running, launches it.
{
OSStatus err;
Boolean found;
ProcessInfoRec info;
assert(psnPtr != NULL);
psnPtr->lowLongOfPSN = kNoProcess;
psnPtr->highLongOfPSN = kNoProcess;
do {
err = GetNextProcess(psnPtr);
if (err == noErr) {
memset(&info, 0, sizeof(info));
err = GetProcessInformation(psnPtr, &info);
}
if (err == noErr) {
found = (info.processSignature == kSystemEventsCreator);
}
} while ( (err == noErr) && ! found );
if (err == procNotFound) {
err = LaunchSystemEvents(psnPtr);
}
return err;
}
#if ! defined(LOGIN_ITEMS_AE_PRINT_DESC)
#if defined(NDEBUG)
#define LOGIN_ITEMS_AE_PRINT_DESC 0
#else
#define LOGIN_ITEMS_AE_PRINT_DESC 0 // change this to 1 to get output in debug build
#endif
#endif
static OSStatus SendAppleEvent(const AEDesc *event, AEDesc *reply)
// This is the bottleneck routine we use for sending Apple events.
// It has a number of neato features.
//
// o It use the "AEMach.h" routine AESendMessage because that allows
// us to do an RPC without having to field UI events while waiting
// for the reply. Yay for Mac OS X!
//
// o It automatically extracts the error from the reply.
//
// o It allows you to enable printing of events and their replies
// for debugging purposes.
{
static const long kAETimeoutTicks = 5 * 60;
OSStatus err;
OSErr replyErr;
DescType junkType;
Size junkSize;
// Normally I don't declare function prototypes in local scope,
// but I made this exception because I don't want anyone except
// for this routine calling GDBPrintAEDesc. This routine takes
// care to only link with the routine when debugging is enabled;
// everyone else might not be so careful.
#if LOGIN_ITEMS_AE_PRINT_DESC
extern void GDBPrintAEDesc(const AEDesc *desc);
// This is private system function used to print a
// textual representation of an AEDesc to stderr.
// It's very handy when debugging, and is meant only
// for that purpose. It's only available to Mach-O
// clients. We use it when debugging *only*.
#endif
assert(event != NULL);
assert(reply != NULL);
#if LOGIN_ITEMS_AE_PRINT_DESC
GDBPrintAEDesc(event);
#endif
err = AESendMessage(event, reply, kAEWaitReply, kAETimeoutTicks);
#if LOGIN_ITEMS_AE_PRINT_DESC
GDBPrintAEDesc(reply);
#endif
// Extract any error from the Apple event handler via the
// keyErrorNumber parameter of the reply.
if ( (err == noErr) && (reply->descriptorType != typeNull) ) {
err = AEGetParamPtr(
reply,
keyErrorNumber,
typeShortInteger,
&junkType,
&replyErr,
sizeof(replyErr),
&junkSize
);
if (err == errAEDescNotFound ) {
err = noErr;
} else {
err = replyErr;
}
}
return err;
}
/////////////////////////////////////////////////////////////////
#pragma mark ***** Constants from Login Items AppleScript Dictionary
enum {
cLoginItem = 'logi',
propPath = 'ppth',
propHidden = 'hidn'
};
/////////////////////////////////////////////////////////////////
#pragma mark ***** Public routines (and helpers)
static const AEDesc kAENull = { typeNull, NULL };
static void AEDisposeDescQ(AEDesc *descPtr)
{
OSStatus junk;
junk = AEDisposeDesc(descPtr);
assert(junk == noErr);
*descPtr = kAENull;
}
static void CFQRelease(CFTypeRef cf)
{
if (cf != NULL) {
CFRelease(cf);
}
}
static OSStatus CreateCFArrayFromAEDescList(
const AEDescList * descList,
CFArrayRef * itemsPtr
)
// This routine's input is an AEDescList that contains replies
// from the "properties of every login item" event. Each element
// of the list is an AERecord with two important properties,
// "path" and "hidden". This routine creates a CFArray that
// corresponds to this list. Each element of the CFArray
// contains two properties, kLIAEURL and
// kLIAEHidden, that are derived from the corresponding
// AERecord properties.
//
// On entry, descList must not be NULL
// On entry, itemsPtr must not be NULL
// On entry, *itemsPtr must be NULL
// On success, *itemsPtr will be a valid CFArray
// On error, *itemsPtr will be NULL
{
OSStatus err;
CFMutableArrayRef result;
long itemCount;
long itemIndex;
AEKeyword junkKeyword;
DescType junkType;
Size junkSize;
assert( itemsPtr != NULL);
assert(*itemsPtr == NULL);
result = NULL;
// Create a place for the result.
err = noErr;
result = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
if (result == NULL) {
err = coreFoundationUnknownErr;
}
// For each element in the descriptor list...
if (err == noErr) {
err = AECountItems(descList, &itemCount);
}
if (err == noErr) {
for (itemIndex = 1; itemIndex <= itemCount; itemIndex++) {
AERecord thisItem;
UInt8 thisPath[1024];
Size thisPathSize;
FSRef thisItemRef;
CFURLRef thisItemURL;
Boolean thisItemHidden;
CFDictionaryRef thisItemDict;
thisItem = kAENull;
thisItemURL = NULL;
thisItemDict = NULL;
// Get this element's AERecord.
err = AEGetNthDesc(descList, itemIndex, typeAERecord, &junkKeyword, &thisItem);
// Extract the path and create a CFURL.
if (err == noErr) {
err = AEGetKeyPtr(
&thisItem,
propPath,
typeUTF8Text,
&junkType,
thisPath,
sizeof(thisPath) - 1, // to ensure that we can always add null terminator
&thisPathSize
);
}
if (err == noErr) {
thisPath[thisPathSize] = 0;
err = FSPathMakeRef(thisPath, &thisItemRef, NULL);
if (err == noErr) {
thisItemURL = CFURLCreateFromFSRef(NULL, &thisItemRef);
} else {
err = noErr; // swallow error and create an imprecise URL
thisItemURL = CFURLCreateFromFileSystemRepresentation(
NULL,
thisPath,
thisPathSize,
false
);
}
if (thisItemURL == NULL) {
err = coreFoundationUnknownErr;
}
}
// Extract the hidden flag.
if (err == noErr) {
err = AEGetKeyPtr(
&thisItem,
propHidden,
typeBoolean,
&junkType,
&thisItemHidden,
sizeof(thisItemHidden),
&junkSize
);
// Work around <rdar://problem/4052117> by assuming that hidden
// is false if we can't get its value.
if (err != noErr) {
thisItemHidden = false;
err = noErr;
}
}
// Create the CFDictionary for this item.
if (err == noErr) {
CFStringRef keys[2];
CFTypeRef values[2];
keys[0] = kLIAEURL;
keys[1] = kLIAEHidden;
values[0] = thisItemURL;
values[1] = (thisItemHidden ? kCFBooleanTrue : kCFBooleanFalse);
thisItemDict = CFDictionaryCreate(
NULL,
(const void **) keys,
values,
2,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks
);
if (thisItemDict == NULL) {
err = coreFoundationUnknownErr;
}
}
// Add it to the results array.
if (err == noErr) {
CFArrayAppendValue(result, thisItemDict);
}
AEDisposeDescQ(&thisItem);
CFQRelease(thisItemURL);
CFQRelease(thisItemDict);
if (err != noErr) {
break;
}
}
}
// Clean up.
if (err != noErr) {
CFQRelease(result);
result = NULL;
}
*itemsPtr = result;
assert( (err == noErr) == (*itemsPtr != NULL) );
return err;
}
static OSStatus SendEventToSystemEventsWithParameters(
AEEventClass theClass,
AEEventID theEvent,
AppleEvent * reply,
...
)
// Creates an Apple event and sends it to the System Events
// process. theClass and theEvent are the event class and ID,
// respectively. If reply is not NULL, the caller gets a copy
// of the reply. Following reply is a variable number of Apple event
// parameters. Each AE parameter is made up of two C parameters,
// the first being the AEKeyword, the second being a pointer to
// the AEDesc for that parameter. This list is terminated by an
// AEKeyword of value 0.
//
// You typically call this as:
//
// err = SendEventToSystemEventsWithParameters(
// kClass,
// kEvent,
// NULL,
// param1_keyword, param1_desc_ptr,
// param2_keyword, param2_desc_ptr,
// 0
// );
//
// On entry, reply must be NULL or *reply must be the null AEDesc.
// On success, if reply is not NULL, *reply will be the AE reply
// (that is, not a null desc).
// On error, if reply is not NULL, *reply will be the null AEDesc.
{
OSStatus err;
ProcessSerialNumber psn;
AppleEvent target;
AppleEvent event;
AppleEvent localReply;
AEDescList results;
assert( (reply == NULL) || (reply->descriptorType == typeNull) );
target = kAENull;
event = kAENull;
localReply = kAENull;
results = kAENull;
// Create Apple event.
err = FindSystemEvents(&psn);
if (err == noErr) {
err = AECreateDesc(typeProcessSerialNumber, &psn, sizeof(psn), &target);
}
if (err == noErr) {
err = AECreateAppleEvent(
theClass,
theEvent,
&target,
kAutoGenerateReturnID,
kAnyTransactionID,
&event
);
}
// Handle varargs parameters.
if (err == noErr) {
va_list ap;
AEKeyword thisKeyword;
const AEDesc * thisDesc;
va_start(ap, reply);
do {
thisKeyword = va_arg(ap, AEKeyword);
if (thisKeyword != 0) {
thisDesc = va_arg(ap, const AEDesc *);
assert(thisDesc != NULL);
err = AEPutParamDesc(&event, thisKeyword, thisDesc);
}
} while ( (err == noErr) && (thisKeyword != 0) );
va_end(ap);
}
// Send event and get reply.
if (err == noErr) {
err = SendAppleEvent(&event, &localReply);
}
// Clean up.
if ( (reply == NULL) || (err != noErr)) {
// *reply is already null because of our precondition
AEDisposeDescQ(&localReply);
} else {
*reply = localReply;
}
AEDisposeDescQ(&event);
AEDisposeDescQ(&target);
assert( (reply == NULL) || ((err == noErr) == (reply->descriptorType != typeNull)) );
return err;
}
extern OSStatus LIAECopyLoginItems(CFArrayRef *itemsPtr)
// See comment in header.
//
// This routine creates an Apple event that corresponds to the
// AppleScript:
//
// get properties of every login item
//
// and sends it to System Events. It then processes the reply
// into a CFArray in the format that's documented in the header
// comments.
{
OSStatus err;
AppleEvent reply;
AEDescList results;
AEDesc propertiesOfEveryLoginItem;
assert( itemsPtr != NULL);
assert(*itemsPtr == NULL);
reply = kAENull;
results = kAENull;
propertiesOfEveryLoginItem = kAENull;
// Build object specifier for "properties of every login item".
{
static const DescType keyAEPropertiesLocal = pProperties;
static const DescType kAEAllLocal = kAEAll;
AEDesc every;
AEDesc everyLoginItem;
AEDesc properties;
every = kAENull;
everyLoginItem = kAENull;
properties = kAENull;
err = AECreateDesc(typeAbsoluteOrdinal, &kAEAllLocal, sizeof(kAEAllLocal), &every);
if (err == noErr) {
err = CreateObjSpecifier(cLoginItem, (AEDesc *) &kAENull, formAbsolutePosition, &every, false, &everyLoginItem);
}
if (err == noErr) {
err = AECreateDesc(typeType, &keyAEPropertiesLocal, sizeof(keyAEPropertiesLocal), &properties);
}
if (err == noErr) {
err = CreateObjSpecifier(
typeProperty,
&everyLoginItem,
formPropertyID,
&properties,
false,
&propertiesOfEveryLoginItem);
}
AEDisposeDescQ(&every);
AEDisposeDescQ(&everyLoginItem);
AEDisposeDescQ(&properties);
}
// Send event and get reply.
if (err == noErr) {
err = SendEventToSystemEventsWithParameters(
kAECoreSuite,
kAEGetData,
&reply,
keyDirectObject, &propertiesOfEveryLoginItem,
0
);
}
// Process reply.
if (err == noErr) {
err = AEGetParamDesc(&reply, keyDirectObject, typeAEList, &results);
}
if (err == noErr) {
err = CreateCFArrayFromAEDescList(&results, itemsPtr);
}
// Clean up.
AEDisposeDescQ(&reply);
AEDisposeDescQ(&results);
AEDisposeDescQ(&propertiesOfEveryLoginItem);
assert( (err == noErr) == (*itemsPtr != NULL) );
return err;
}
extern OSStatus LIAEAddRefAtEnd(const FSRef *item, Boolean hideIt)
// See comment in header.
//
// This routine creates an Apple event that corresponds to the
// AppleScript:
//
// make new login item
// with properties {
// path:<path of item>,
// hidden:hideIt
// }
// at end
//
// and sends it to System Events.
{
OSStatus err;
AEDesc newLoginItem;
AERecord properties;
AERecord endLoc;
static const DescType cLoginItemLocal = cLoginItem;
assert(item != NULL);
newLoginItem = kAENull;
endLoc = kAENull;
properties = kAENull;
// Create "new login item" parameter.
err = AECreateDesc(typeType, &cLoginItemLocal, sizeof(cLoginItemLocal), &newLoginItem);
// Create "with properties" parameter.
if (err == noErr) {
char path[1024];
AEDesc pathDesc;
pathDesc = kAENull;
err = AECreateList(NULL, 0, true, &properties);
if (err == noErr) {
err = FSRefMakePath(item, (UInt8 *) path, sizeof(path));
}
// System Events complains if you pass it typeUTF8Text directly, so
// we do the conversion from typeUTF8Text to typeUnicodeText on our
// side of the world.
if (err == noErr) {
err = AECoercePtr(typeUTF8Text, path, (Size) strlen(path), typeUnicodeText, &pathDesc);
}
if (err == noErr) {
err = AEPutKeyDesc(&properties, propPath, &pathDesc);
}
if (err == noErr) {
err = AEPutKeyPtr(&properties, propHidden, typeBoolean, &hideIt, sizeof(hideIt));
}
AEDisposeDescQ(&pathDesc);
}
// Create "at end" parameter.
if (err == noErr) {
AERecord end;
static const DescType kAEEndLocal = kAEEnd;
end = kAENull;
err = AECreateList(NULL, 0, true, &end);
if (err == noErr) {
err = AEPutKeyPtr(&end, keyAEObject, typeNull, NULL, 0);
}
if (err == noErr) {
err = AEPutKeyPtr(&end, keyAEPosition, typeEnumerated, &kAEEndLocal, (Size) sizeof(kAEEndLocal));
}
if (err == noErr) {
err = AECoerceDesc(&end, cInsertionLoc, &endLoc);
}
AEDisposeDescQ(&end);
}
// Send the event.
if (err == noErr) {
err = SendEventToSystemEventsWithParameters(
kAECoreSuite,
kAECreateElement,
NULL,
keyAEObjectClass, &newLoginItem,
keyAEPropData, &properties,
keyAEInsertHere, &endLoc,
0
);
}
// Clean up.
AEDisposeDescQ(&newLoginItem);
AEDisposeDescQ(&endLoc);
AEDisposeDescQ(&properties);
return err;
}
extern OSStatus LIAEAddURLAtEnd(CFURLRef item, Boolean hideIt)
// See comment in header.
//
// This is implemented as a wrapper around LIAEAddRef.
// I chose to do it this way because an URL can reference a
// file that doesn't except, whereas an FSRef can't, so by
// having the URL routine call the FSRef routine, I naturally
// ensure that the item exists on disk.
{
OSStatus err;
Boolean success;
FSRef ref;
assert(item != NULL);
err = noErr;
success = CFURLGetFSRef(item, &ref);
if ( ! success ) {
// I have no idea what went wrong (thanks CF!). Normally I'd
// return coreFoundationUnknownErr here, but in this case I'm
// going to go out on a limb and say that we have a file not found.
err = fnfErr;
}
if (err == noErr) {
err = LIAEAddRefAtEnd(&ref, hideIt);
}
return err;
}
extern OSStatus LIAERemove(CFIndex itemIndex)
// See comment in header.
//
// This routine creates an Apple event that corresponds to the
// AppleScript:
//
// delete login item itemIndex
//
// and sends it to System Events.
{
OSStatus err;
long itemIndexPlusOne;
AEDesc indexDesc;
AEDesc loginItemAtIndex;
assert(itemIndex >= 0);
indexDesc = kAENull;
loginItemAtIndex = kAENull;
// Build object specifier for "login item X".
itemIndexPlusOne = itemIndex + 1; // AppleScript is one-based, CF is zero-based
err = AECreateDesc(typeLongInteger, &itemIndexPlusOne, sizeof(itemIndexPlusOne), &indexDesc);
if (err == noErr) {
err = CreateObjSpecifier(cLoginItem, (AEDesc *) &kAENull, formAbsolutePosition, &indexDesc, false, &loginItemAtIndex);
}
// Send the event.
if (err == noErr) {
err = SendEventToSystemEventsWithParameters(
kAECoreSuite,
kAEDelete,
NULL,
keyDirectObject, &loginItemAtIndex,
0
);
}
// Clean up.
AEDisposeDescQ(&indexDesc);
AEDisposeDescQ(&loginItemAtIndex);
return err;
}