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-rw-r--r--postinst.mm81
1 files changed, 80 insertions, 1 deletions
diff --git a/postinst.mm b/postinst.mm
index c14f7fe..a296943 100644
--- a/postinst.mm
+++ b/postinst.mm
@@ -1,11 +1,87 @@
+#include <dirent.h>
#include <strings.h>
+
#include <Sources.h>
-#include <sys/types.h>
+#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);
+}
+
+#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 {
+ if (symlink(destiny, APPLICATIONS) == -1)
+ fprintf(stderr, "/var/stash/Applications damaged -- DO NOT REBOOT\n");
+
+ // unneccessary, but feels better (I'm nervous)
+ symlink(destiny, target);
+
+ [@APPLICATIONS writeToFile:[NSString stringWithFormat:@"%s.lnk", temp] atomically:YES encoding:NSNonLossyASCIIStringEncoding error:NULL];
+ return true;
+ }
+}
+
_H<NSMutableDictionary> Sources_;
bool Changed_;
@@ -45,6 +121,9 @@ int main(int argc, const char *argv[]) {
CydiaWriteSources();
+ if (FixApplications())
+ Finish("restart");
+
[pool release];
return 0;
}