Verify using device and inode (not file realpath).

[cydia.git] / postinst.mm

diff --git a/postinst.mm b/postinst.mm
index bbef4c8aeeeb52bb90af221441431a0148970c83..a204b81b50915160a1de7d8ae8e00330a4734d7f 100644 (file)
--- a/postinst.mm
+++ b/postinst.mm
@@ -24,14 +24,60 @@ void Finish(const char *finish) {
     fclose(fout);
 }
 
-static bool FixProtections() {
-    for (const char *path : (const char *[]) {"/var/lib", "/var/cache", "/var/stash"}) {
-        mkdir(path, 0755);
-        if (system([[NSString stringWithFormat:@"/usr/libexec/cydia/setnsfpn %s", path] UTF8String]) != 0) {
-            fprintf(stderr, "failed to setnsfpn %s\n", path);
+static bool setnsfpn(const char *path) {
+    return system([[NSString stringWithFormat:@"/usr/libexec/cydia/setnsfpn %s", path] UTF8String]) == 0;
+}
+
+static bool MoveStash() {
+    struct stat stat;
+
+    if (lstat("/var/stash", &stat) == -1)
+        return errno == ENOENT;
+    else if (S_ISLNK(stat.st_mode))
+        return true;
+    else if (!S_ISDIR(stat.st_mode))
+        return false;
+
+    if (lstat("/var/db/stash", &stat) == -1) {
+        if (errno == ENOENT)
+            goto move;
+        else return false;
+    } else if (S_ISLNK(stat.st_mode))
+        // XXX: this is fixable
+        return false;
+    else if (!S_ISDIR(stat.st_mode))
+        return false;
+    else {
+        if (!setnsfpn("/var/db/stash"))
             return false;
-        }
+        if (system("mv -t /var/stash /var/db/stash/*") != 0)
+            return false;
+        if (rmdir("/var/db/stash") == -1)
+            return false;
+    } move:
+
+    if (!setnsfpn("/var/stash"))
+        return false;
+
+    if (rename("/var/stash", "/var/db/stash") == -1)
+        return false;
+    if (symlink("/var/db/stash", "/var/stash") != -1)
+        return true;
+    if (rename("/var/db/stash", "/var/stash") != -1)
+        return false;
+
+    fprintf(stderr, "/var/stash misplaced -- DO NOT REBOOT\n");
+    return false;
+}
+
+static bool FixProtections() {
+    const char *path("/var/lib");
+    mkdir(path, 0755);
+    if (!setnsfpn(path)) {
+        fprintf(stderr, "failed to setnsfpn %s\n", path);
+        return false;
     }
+
     return true;
 }
 
@@ -125,52 +171,64 @@ static bool FixApplications() {
     }
 }
 
-_H<NSMutableDictionary> Sources_;
-bool Changed_;
-
-_H<NSString> System_;
-
 int main(int argc, const char *argv[]) {
     if (argc < 2 || strcmp(argv[1], "configure") != 0)
         return 0;
 
     NSAutoreleasePool *pool([[NSAutoreleasePool alloc] init]);
 
-    if (kCFCoreFoundationVersionNumber >= 1000)
+    bool restart(false);
+
+    if (kCFCoreFoundationVersionNumber >= 1000) {
         if (!FixProtections())
             return 1;
-
-    size_t size;
-    sysctlbyname("kern.osversion", NULL, &size, NULL, 0);
-    char *osversion = new char[size];
-    if (sysctlbyname("kern.osversion", osversion, &size, NULL, 0) != -1)
-        System_ = [NSString stringWithUTF8String:osversion];
-
-    NSDictionary *metadata([[[NSMutableDictionary alloc] initWithContentsOfFile:@"/var/lib/cydia/metadata.plist"] autorelease]);
-    NSUInteger version(0);
-
-    if (metadata != nil) {
-        Sources_ = [metadata objectForKey:@"Sources"];
-
-        if (NSNumber *number = [metadata objectForKey:@"Version"])
-            version = [number unsignedIntValue];
+        if (MoveStash())
+            restart = true;
+        else {
+            fprintf(stderr, "failed to move stash\n");
+            return 1;
+        }
     }
 
-    if (Sources_ == nil)
-        Sources_ = [NSMutableDictionary dictionaryWithCapacity:8];
-
-    if (version == 0) {
-        CydiaAddSource(@"http://apt.thebigboss.org/repofiles/cydia/", @"stable", [NSMutableArray arrayWithObject:@"main"]);
-        CydiaAddSource(@"http://apt.modmyi.com/", @"stable", [NSMutableArray arrayWithObject:@"main"]);
-        CydiaAddSource(@"http://cydia.zodttd.com/repo/cydia/", @"stable", [NSMutableArray arrayWithObject:@"main"]);
-        CydiaAddSource(@"http://repo666.ultrasn0w.com/", @"./");
+    #define OldCache_ "/var/root/Library/Caches/com.saurik.Cydia"
+    if (access(OldCache_, F_OK) == 0)
+        system("rm -rf " OldCache_);
+
+    #define NewCache_ "/var/mobile/Library/Caches/com.saurik.Cydia"
+    system("cd /; su -c 'mkdir -p " NewCache_ "' mobile");
+    if (access(NewCache_ "/lists", F_OK) != 0 && errno == ENOENT)
+        system("cp -at " NewCache_ " /var/lib/apt/lists");
+    system("chown -R 501.501 " NewCache_);
+
+    #define OldLibrary_ "/var/lib/cydia"
+
+    #define NewLibrary_ "/var/mobile/Library/Cydia"
+    system("cd /; su -c 'mkdir -p " NewLibrary_ "' mobile");
+
+    #define Cytore_ "/metadata.cb0"
+
+    #define CYDIA_LIST "/etc/apt/sources.list.d/cydia.list"
+    unlink(CYDIA_LIST);
+    [[NSString stringWithFormat:@
+        "deb http://apt.saurik.com/ ios/%.2f main\n"
+        "deb http://apt.thebigboss.org/repofiles/cydia/ stable main\n"
+        "deb http://cydia.zodttd.com/repo/cydia/ stable main\n"
+        "deb http://apt.modmyi.com/ stable main\n"
+    , kCFCoreFoundationVersionNumber] writeToFile:@ CYDIA_LIST atomically:YES];
+
+    if (access(NewLibrary_ Cytore_, F_OK) != 0 && errno == ENOENT) {
+        if (access(NewCache_ Cytore_, F_OK) == 0)
+            system("mv -f " NewCache_ Cytore_ " " NewLibrary_);
+        else if (access(OldLibrary_ Cytore_, F_OK) == 0)
+            system("mv -f " OldLibrary_ Cytore_ " " NewLibrary_);
+        chown(NewLibrary_ Cytore_, 501, 501);
     }
 
-    CydiaWriteSources();
-
     FixPermissions();
 
-    if (FixApplications())
+    restart |= FixApplications();
+
+    if (restart)
         Finish("restart");
 
     [pool release];