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// Copyright 2010, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// This code emanates from the Chromium project:
// http://src.chromium.org/viewvc/chrome/trunk/src/base/mac_util.mm
#include <CoreFoundation/CoreFoundation.h>
#include <Carbon/Carbon.h> // Oh noes! See discussion blow at GetCurrentProcess
#ifndef NDEBUG
#include <err.h>
#endif
namespace node {
void OS::SetProcessTitle(char *title) {
static int symbol_lookup_status = 0; // 1=ok, 2=unavailable
if (symbol_lookup_status == 2) {
// feature is unavailable
return;
}
if (process_title) free(process_title);
process_title = strdup(title);
// Warning: here be dragons! This is SPI reverse-engineered from WebKit's
// plugin host, and could break at any time (although realistically it's only
// likely to break in a new major release).
// When 10.7 is available, check that this still works, and update this
// comment for 10.8.
// Private CFType used in these LaunchServices calls.
typedef CFTypeRef PrivateLSASN;
typedef PrivateLSASN (*LSGetCurrentApplicationASNType)();
typedef OSStatus (*LSSetApplicationInformationItemType)(int, PrivateLSASN,
CFStringRef,
CFStringRef,
CFDictionaryRef*);
static LSGetCurrentApplicationASNType ls_get_current_application_asn_func =
NULL;
static LSSetApplicationInformationItemType
ls_set_application_information_item_func = NULL;
static CFStringRef ls_display_name_key = NULL;
if (!symbol_lookup_status) {
CFBundleRef launch_services_bundle =
CFBundleGetBundleWithIdentifier(CFSTR("com.apple.LaunchServices"));
if (!launch_services_bundle) {
#ifndef NDEBUG
warnx("failed to look up LaunchServices bundle");
#endif
symbol_lookup_status = 2;
return;
}
ls_get_current_application_asn_func =
reinterpret_cast<LSGetCurrentApplicationASNType>(
CFBundleGetFunctionPointerForName(
launch_services_bundle, CFSTR("_LSGetCurrentApplicationASN")));
if (!ls_get_current_application_asn_func) {
#ifndef NDEBUG
warnx("could not find _LSGetCurrentApplicationASN");
#endif
symbol_lookup_status = 2;
return;
}
ls_set_application_information_item_func =
reinterpret_cast<LSSetApplicationInformationItemType>(
CFBundleGetFunctionPointerForName(
launch_services_bundle,
CFSTR("_LSSetApplicationInformationItem")));
if (!ls_set_application_information_item_func) {
#ifndef NDEBUG
warnx("Could not find _LSSetApplicationInformationItem");
#endif
symbol_lookup_status = 2;
return;
}
const CFStringRef* key_pointer = reinterpret_cast<const CFStringRef*>(
CFBundleGetDataPointerForName(launch_services_bundle,
CFSTR("_kLSDisplayNameKey")));
ls_display_name_key = key_pointer ? *key_pointer : NULL;
if (!ls_display_name_key) {
#ifndef NDEBUG
warnx("Could not find _kLSDisplayNameKey");
#endif
symbol_lookup_status = 2;
return;
}
// Internally, this call relies on the Mach ports that are started up by the
// Carbon Process Manager. In debug builds this usually happens due to how
// the logging layers are started up; but in release, it isn't started in as
// much of a defined order. So if the symbols had to be loaded, go ahead
// and force a call to make sure the manager has been initialized and hence
// the ports are opened.
ProcessSerialNumber psn;
GetCurrentProcess(&psn);
symbol_lookup_status = 1; // 1=ok
}
PrivateLSASN asn = ls_get_current_application_asn_func();
// Constant used by WebKit; what exactly it means is unknown.
const int magic_session_constant = -2;
CFStringRef process_name =
CFStringCreateWithCString(NULL, title, kCFStringEncodingUTF8);
OSErr err =
ls_set_application_information_item_func(magic_session_constant, asn,
ls_display_name_key,
process_name,
NULL /* optional out param */);
#ifndef NDEBUG
if (err) {
warnx("Call LSSetApplicationInformationItem failed");
}
#endif
}
} // namespace node
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