Do not crash if Safari's Info.plist can't be read.

[cydia.git] / postinst.mm

diff --git a/postinst.mm b/postinst.mm
index f55db811f38a5481083656dbae8f3fac406f4e43..f826f4ff3c9ffdf5b138179dc1c533e512613aad 100644 (file)
--- a/postinst.mm
+++ b/postinst.mm
@@ -1,15 +1,183 @@
+#include "CyteKit/UCPlatform.h"
+
+#include <dirent.h>

 #include <strings.h>
 #include <strings.h>

+

 #include <Sources.h>
 
 #include <Sources.h>
 

-#include <UIKit/UIKit.h>
-#include <CydiaSubstrate/CydiaSubstrate.h>
-#include "CyteKit/PerlCompatibleRegEx.hpp"
+#include <sys/stat.h>
+#include <sys/sysctl.h>
+#include <sys/types.h>
+
+#include <Menes/ObjectHandle.h>
+
+void Finish(const char *finish) {
+    if (finish == NULL)
+        return;
+
+    const char *cydia(getenv("CYDIA"));
+    if (cydia == NULL)
+        return;
+
+    int fd([[[[NSString stringWithUTF8String:cydia] componentsSeparatedByString:@" "] objectAtIndex:0] intValue]);
+
+    FILE *fout(fdopen(fd, "w"));
+    fprintf(fout, "finish:%s\n", finish);
+    fclose(fout);
+}
+
+static bool setnsfpn(const char *path) {
+    return system([[NSString stringWithFormat:@"/usr/libexec/cydia/setnsfpn %s", path] UTF8String]) == 0;
+}
+
+enum StashStatus {
+    StashDone,
+    StashFail,
+    StashGood,
+};
+
+static StashStatus MoveStash() {
+    struct stat stat;
+
+    if (lstat("/var/stash", &stat) == -1)
+        return errno == ENOENT ? StashGood : StashFail;
+    else if (S_ISLNK(stat.st_mode))
+        return StashGood;
+    else if (!S_ISDIR(stat.st_mode))
+        return StashFail;
+
+    if (lstat("/var/db/stash", &stat) == -1) {
+        if (errno == ENOENT)
+            goto move;
+        else return StashFail;
+    } else if (S_ISLNK(stat.st_mode))
+        // XXX: this is fixable
+        return StashFail;
+    else if (!S_ISDIR(stat.st_mode))
+        return StashFail;
+    else {
+        if (!setnsfpn("/var/db/stash"))
+            return StashFail;
+        if (system("mv -t /var/stash /var/db/stash/*") != 0)
+            return StashFail;
+        if (rmdir("/var/db/stash") == -1)
+            return StashFail;
+    } move:
+
+    if (!setnsfpn("/var/stash"))
+        return StashFail;
+
+    if (rename("/var/stash", "/var/db/stash") == -1)
+        return StashFail;
+    if (symlink("/var/db/stash", "/var/stash") != -1)
+        return StashDone;
+    if (rename("/var/db/stash", "/var/stash") != -1)
+        return StashFail;
+
+    fprintf(stderr, "/var/stash misplaced -- DO NOT REBOOT\n");
+    return StashFail;
+}
+
+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;
+}
+
+static void FixPermissions() {
+    DIR *stash(opendir("/var/stash"));
+    if (stash == NULL)
+        return;
+
+    while (dirent *entry = readdir(stash)) {
+        const char *folder(entry->d_name);
+        if (strlen(folder) != 8)
+            continue;
+        if (strncmp(folder, "_.", 2) != 0)
+            continue;

 
 

-_H<NSMutableDictionary> Sources_;
-_H<NSString> CydiaSource_;
-bool Changed_;
+        char path[1024];
+        sprintf(path, "/var/stash/%s", folder);

 
 

-_H<NSString> Firmware_;
+        struct stat stat;
+        if (lstat(path, &stat) == -1)
+            continue;
+        if (!S_ISDIR(stat.st_mode))
+            continue;
+
+        chmod(path, 0755);
+    }
+
+    closedir(stash);
+}
+
+#define APPLICATIONS "/Applications"
+static bool FixApplications() {
+    char target[1024];
+    ssize_t length(readlink(APPLICATIONS, target, sizeof(target)));
+    if (length == -1)
+        return false;
+
+    if (length >= sizeof(target)) // >= "just in case" (I'm nervous)
+        return false;
+    target[length] = '\0';
+
+    if (strlen(target) != 30)
+        return false;
+    if (memcmp(target, "/var/stash/Applications.", 24) != 0)
+        return false;
+    if (strchr(target + 24, '/') != NULL)
+        return false;
+
+    struct stat stat;
+    if (lstat(target, &stat) == -1)
+        return false;
+    if (!S_ISDIR(stat.st_mode))
+        return false;
+
+    char temp[] = "/var/stash/_.XXXXXX";
+    if (mkdtemp(temp) == NULL)
+        return false;
+
+    if (false) undo: {
+        unlink(temp);
+        return false;
+    }
+
+    if (chmod(temp, 0755) == -1)
+        goto undo;
+
+    char destiny[strlen(temp) + 32];
+    sprintf(destiny, "%s%s", temp, APPLICATIONS);
+
+    if (unlink(APPLICATIONS) == -1)
+        goto undo;
+
+    if (rename(target, destiny) == -1) {
+        if (symlink(target, APPLICATIONS) == -1)
+            fprintf(stderr, "/Applications damaged -- DO NOT REBOOT\n");
+        goto undo;
+    } else {
+        bool success;
+        if (symlink(destiny, APPLICATIONS) != -1)
+            success = true;
+        else {
+            fprintf(stderr, "/var/stash/Applications damaged -- DO NOT REBOOT\n");
+            success = false;
+        }
+
+        // unneccessary, but feels better (I'm nervous)
+        symlink(destiny, target);
+
+        [@APPLICATIONS writeToFile:[NSString stringWithFormat:@"%s.lnk", temp] atomically:YES encoding:NSNonLossyASCIIStringEncoding error:NULL];
+        return success;
+    }
+}

 
 int main(int argc, const char *argv[]) {
     if (argc < 2 || strcmp(argv[1], "configure") != 0)
 
 int main(int argc, const char *argv[]) {
     if (argc < 2 || strcmp(argv[1], "configure") != 0)


@@ -17,36 +185,63 @@ int main(int argc, const char *argv[]) {
 
     NSAutoreleasePool *pool([[NSAutoreleasePool alloc] init]);
 
 
     NSAutoreleasePool *pool([[NSAutoreleasePool alloc] init]);
 

-    Pcre pattern("^([0-9]+\\.[0-9]+)");
+    bool restart(false);

 
 

-    if (pattern([[UIDevice currentDevice] systemVersion]))
-        Firmware_ = pattern[1];
+    if (kCFCoreFoundationVersionNumber >= 1000) {
+        if (!FixProtections())
+            return 1;
+        switch (MoveStash()) {
+            case StashDone:
+                restart = true;
+                break;
+            case StashFail:
+                fprintf(stderr, "failed to move stash\n");
+                return 1;
+            case StashGood:
+                break;
+        }
+    }

 
 

-    NSDictionary *metadata([[[NSMutableDictionary alloc] initWithContentsOfFile:@"/var/lib/cydia/metadata.plist"] autorelease]);
-    NSUInteger version(0);
+    #define OldCache_ "/var/root/Library/Caches/com.saurik.Cydia"
+    if (access(OldCache_, F_OK) == 0)
+        system("rm -rf " OldCache_);

 
 

-    if (metadata != nil) {
-        Sources_ = [metadata objectForKey:@"Sources"];
-        CydiaSource_ = [metadata objectForKey:@"CydiaSource"];
+    #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_);

 
 

-        if (NSNumber *number = [metadata objectForKey:@"Version"])
-            version = [number unsignedIntValue];
-    }
+    #define OldLibrary_ "/var/lib/cydia"

 
 

-    if (CydiaSource_ == nil)
-        CydiaSource_ = @"apt.saurik.com";
+    #define NewLibrary_ "/var/mobile/Library/Cydia"
+    system("cd /; su -c 'mkdir -p " NewLibrary_ "' mobile");

 
 

-    if (Sources_ == nil)
-        Sources_ = [NSMutableDictionary dictionaryWithCapacity:8];
+    #define Cytore_ "/metadata.cb0"

 
 

-    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 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();
+
+    restart |= FixApplications();
+
+    if (restart)
+        Finish("restart");

 
     [pool release];
     return 0;
 
     [pool release];
     return 0;