From 68d2b30b8a240347caa0937c75cfbf0079b7a3a5 Mon Sep 17 00:00:00 2001
From: "Jay Freeman (saurik)" <saurik@saurik.com>
Date: Fri, 22 Jul 2016 15:19:04 -0700
Subject: [PATCH] Add ldrestart for safe restart from app jailbreak.

---
 .gitignore    |  1 +
 ldrestart.cpp | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++
 makefile      |  7 ++++-
 3 files changed, 86 insertions(+), 1 deletion(-)
 create mode 100644 ldrestart.cpp

diff --git a/.gitignore b/.gitignore
index f891275..a768abc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@ debs
 extrainst_
 gssc
 iomfsetgamma
+ldrestart
 sbdidlaunch
 sbreload
 uicache
diff --git a/ldrestart.cpp b/ldrestart.cpp
new file mode 100644
index 0000000..04f7a8b
--- /dev/null
+++ b/ldrestart.cpp
@@ -0,0 +1,79 @@
+/* Cydia - iPhone UIKit Front-End for Debian APT
+ * Copyright (C) 2008-2015  Jay Freeman (saurik)
+*/
+
+/* GNU General Public License, Version 3 {{{ */
+/*
+ * Cydia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 3 of the License,
+ * or (at your option) any later version.
+ *
+ * Cydia is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Cydia.  If not, see <http://www.gnu.org/licenses/>.
+**/
+/* }}} */
+
+#include <cstdio>
+#include <cstdlib>
+
+#include <errno.h>
+#include <signal.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+#include <launch.h>
+
+#include <sys/stat.h>
+
+void process(launch_data_t value, const char *name, void *baton) {
+    if (launch_data_get_type(value) != LAUNCH_DATA_DICTIONARY)
+        return;
+
+    auto integer(launch_data_dict_lookup(value, LAUNCH_JOBKEY_PID));
+    if (integer == NULL || launch_data_get_type(integer) != LAUNCH_DATA_INTEGER)
+        return;
+
+    auto pid(launch_data_get_integer(integer));
+    if (kill(pid, 0) == -1)
+        return;
+
+    auto string(launch_data_dict_lookup(value, LAUNCH_JOBKEY_LABEL));
+    if (string == NULL || launch_data_get_type(string) != LAUNCH_DATA_STRING)
+        return;
+    auto label(launch_data_get_string(string));
+
+    auto stop(launch_data_alloc(LAUNCH_DATA_DICTIONARY));
+    launch_data_dict_insert(stop, string, LAUNCH_KEY_STOPJOB);
+
+    auto result(launch_msg(stop));
+    launch_data_free(stop);
+    if (result == NULL)
+        return;
+
+    if (launch_data_get_type(result) != LAUNCH_DATA_ERRNO)
+        fprintf(stderr, "%s\n", label);
+    else if (auto number = launch_data_get_errno(result))
+        fprintf(stderr, "%s: %s\n", label, strerror(number));
+
+    launch_data_free(result);
+}
+
+int main(int argc, char *argv[]) {
+    auto request(launch_data_new_string(LAUNCH_KEY_GETJOBS));
+    auto response(launch_msg(request));
+    launch_data_free(request);
+
+    if (response == NULL)
+        return EX_UNAVAILABLE;
+    if (launch_data_get_type(response) != LAUNCH_DATA_DICTIONARY)
+        return EX_SOFTWARE;
+
+    launch_data_dict_iterate(response, &process, NULL);
+    return EX_OK;
+}
diff --git a/makefile b/makefile
index 0f16936..bb00062 100644
--- a/makefile
+++ b/makefile
@@ -1,4 +1,4 @@
-uikittools = uiduid uicache uiopen gssc sbdidlaunch sbreload cfversion iomfsetgamma
+uikittools = uiduid uicache uiopen gssc sbdidlaunch sbreload cfversion iomfsetgamma ldrestart
 
 all: $(uikittools)
 
@@ -15,6 +15,7 @@ flags += -framework Foundation
 flags += -miphoneos-version-min=2.0
 flags += -arch armv6
 
+ldrestart := -std=c++11
 gssc := -lobjc
 iomfsetgamma := -I. $(private) -framework IOKit -framework IOMobileFramebuffer
 sbdidlaunch := $(private) -framework SpringBoardServices
@@ -30,6 +31,10 @@ extrainst_: csstore.cpp
 	cycc -- -o $@ $^ $(flags) $($@)
 	ldid -S$(wildcard $@.xml) $@
 
+%: %.cpp
+	cycc -- -o $@ $^ $(flags) $($@)
+	ldid -S$(wildcard $@.xml) $@
+
 %: %.c
 	cycc -- -o $@ -x c $^ $(flags) $($@)
 	ldid -S$(wildcard $@.xml) $@
-- 
2.45.2