gistfile1.m

#import <sys/stat.h>
#import <mach-o/dyld.h>

/**
 * Returns YES if the device is (likely) jailbroken, no otherwise.
 */
static BOOL isJailbroken () {
    int score = 0;

    /* Check for Cydia/Installer apt */
    struct stat sbuf;
    if (stat("/var/lib/apt", &sbuf) < 0) {
        NSLog(@"Probably not jailbroken: %s", strerror(errno));
    } else {
        NSLog(@"Probably jailbroken (unless Apple shipped apt-get)");
        score++;
    }
    

    /* Check for runtime patches only available on jailbroken phones (ABFix, Winterboard, iBirthday, etc) */
    uint32_t imageCount = _dyld_image_count();
    for (uint32_t i = 0; i < imageCount; i++) {
        NSLog(@"Image: %s", _dyld_get_image_name(i));
        // Add checks here
    }

    if (score > 1)
        return YES;

    return NO;
}