Cydia no longer needs its own Substrate Safe Mode.

[cydia.git] / cydo.cpp

diff --git a/cydo.cpp b/cydo.cpp
index 49e419a6e7f422d128bed908572b0359cb7f9368..d6e6f7583c79f45acbab1f220371fb6cd89a9560 100644 (file)
--- a/cydo.cpp
+++ b/cydo.cpp
@@ -1,3 +1,24 @@
+/* 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>
 
@@ -7,6 +28,8 @@
 
 #include <launch.h>
 
+#include <sys/stat.h>
+
 #include <Menes/Function.h>
 
 typedef Function<void, const char *, launch_data_t> LaunchDataIterator;
@@ -25,12 +48,18 @@ int main(int argc, char *argv[]) {
     _assert(response != NULL);
     _assert(launch_data_get_type(response) == LAUNCH_DATA_DICTIONARY);
 
-    int parent(getppid());
+    auto parent(getppid());
+
+    auto cydia(false);
 
-    bool cydia(false);
+    struct stat correct;
+    if (lstat("/Applications/Cydia.app/Cydia", &correct) == -1) {
+        fprintf(stderr, "you have no arms left");
+        return EX_NOPERM;
+    }
 
     launch_data_dict_iterate(response, [=, &cydia](const char *name, launch_data_t value) {
-        if (launch_data_get_type(response) != LAUNCH_DATA_DICTIONARY)
+        if (launch_data_get_type(value) != LAUNCH_DATA_DICTIONARY)
             return;
 
         auto integer(launch_data_dict_lookup(value, LAUNCH_JOBKEY_PID));
@@ -41,20 +70,46 @@ int main(int argc, char *argv[]) {
         if (pid != parent)
             return;
 
+        auto variables(launch_data_dict_lookup(value, LAUNCH_JOBKEY_ENVIRONMENTVARIABLES));
+        if (variables != NULL && launch_data_get_type(variables) == LAUNCH_DATA_DICTIONARY) {
+            auto dyld(false);
+
+            launch_data_dict_iterate(variables, [&dyld](const char *name, launch_data_t value) {
+                if (strncmp(name, "DYLD_", 5) == 0)
+                    dyld = true;
+            });
+
+            if (dyld)
+                return;
+        }
+
         auto string(launch_data_dict_lookup(value, LAUNCH_JOBKEY_PROGRAM));
-        if (string == NULL || launch_data_get_type(string) != LAUNCH_DATA_STRING)
-            return;
+        if (string == NULL || launch_data_get_type(string) != LAUNCH_DATA_STRING) {
+            auto array(launch_data_dict_lookup(value, LAUNCH_JOBKEY_PROGRAMARGUMENTS));
+            if (array == NULL || launch_data_get_type(array) != LAUNCH_DATA_ARRAY)
+                return;
+            if (launch_data_array_get_count(array) == 0)
+                return;
+
+            string = launch_data_array_get_index(array, 0);
+            if (string == NULL || launch_data_get_type(string) != LAUNCH_DATA_STRING)
+                return;
+        }
 
         auto program(launch_data_get_string(string));
         if (program == NULL)
             return;
 
-        if (strcmp(program, "/Applications/Cydia.app/Cydia") == 0)
+        struct stat check;
+        if (lstat(program, &check) == -1)
+            return;
+
+        if (correct.st_dev == check.st_dev && correct.st_ino == check.st_ino)
             cydia = true;
     });
 
     if (!cydia) {
-        fprintf(stderr, "thou shalt not pass\n");
+        fprintf(stderr, "none shall pass\n");
         return EX_NOPERM;
     }