Added inject_library examples (#171)

* added inject_library examples

* Use LazyLock instead of lazy_static

examples/core/inject_lib_blob/Cargo.toml

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+[package]
+name = "inject_lib_blob"
+edition = "2021"
+authors = ["Ricardo J Marques Montilla / Xoffio"]
+publish = false
+
+[lib]
+name = "inject_example"
+crate-type = ["cdylib"]
+
+[dependencies]
+frida = { path = "../../../frida" }
+frida-sys = { path = "../../../frida-sys" }

examples/core/inject_lib_blob/README.md

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+```sh
+# Enter the example directory
+cd examples/core/inject_lib_blob/
+
+# Build the library and the executable
+cargo build --release --lib
+cargo build --release
+
+# Execute it
+../../../target/release/inject_lib_blob <PID>
+
+# Examples:
+../../../target/release/inject_lib_blob 4178767
+../../../target/release/inject_lib_blob $(ps -ax | grep Twitter | grep -v "grep" | awk '{print $1}')
+```

examples/core/inject_lib_blob/src/lib.rs

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+#[no_mangle]
+pub fn injected_function(data: *const std::os::raw::c_char) {
+    unsafe {
+        if let Some(c_str) = data.as_ref() {
+            let message = std::ffi::CStr::from_ptr(c_str).to_string_lossy();
+            println!("injected_function called with data: '{}'", message);
+        }
+    }
+}

examples/core/inject_lib_blob/src/main.rs

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+use frida::{Frida, Inject};
+use std::sync::LazyLock;
+
+static FRIDA: LazyLock<Frida> = LazyLock::new(|| unsafe { Frida::obtain() });
+
+fn main() {
+    let device_manager = frida::DeviceManager::obtain(&FRIDA);
+    let local_device = device_manager.get_local_device();
+    let args: Vec<String> = std::env::args().collect();
+    let pid = args[1].parse().unwrap();
+
+    if let Ok(mut device) = local_device {
+        println!("[*] Frida version: {}", frida::Frida::version());
+        println!("[*] Device name: {}", device.get_name());
+
+        let script_source = include_bytes!("../../../../target/release/libinject_example.so");
+        let id = device
+            .inject_library_blob_sync(pid, script_source, "injected_function", "w00t")
+            .unwrap();
+
+        println!("*** Injected, id={}", id);
+    }
+}

examples/core/inject_lib_file/Cargo.toml

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+[package]
+name = "inject_lib_file"
+edition = "2021"
+authors = ["Ricardo J Marques Montilla / Xoffio"]
+publish = false
+
+[lib]
+name = "inject_example"
+crate-type = ["cdylib"]
+
+[dependencies]
+frida = { path = "../../../frida" }
+frida-sys = { path = "../../../frida-sys" }

examples/core/inject_lib_file/README.md

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+```sh
+# Enter the example directory
+cd examples/core/inject_lib_file/
+
+# Build the library and the executable
+cargo build --release --lib
+cargo build --release
+
+# Execute it
+../../../target/release/inject_lib_file <PID> <LIB_FILE_PATH>
+
+# Examples:
+../../../target/release/inject_lib_file 4178767 ../../../target/release/libinject_example.so
+../../../target/release/inject_lib_file $(ps -ax | grep Twitter | grep -v "grep" | awk '{print $1}') ../../../target/release/libinject_example.so
+```

examples/core/inject_lib_file/src/lib.rs

@@ -0,0 +1,9 @@
+#[no_mangle]
+pub fn injected_function(data: *const std::os::raw::c_char) {
+    unsafe {
+        if let Some(c_str) = data.as_ref() {
+            let message = std::ffi::CStr::from_ptr(c_str).to_string_lossy();
+            println!("injected_function called with data: '{}'", message);
+        }
+    }
+}

examples/core/inject_lib_file/src/main.rs

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+use frida::{Frida, Inject};
+use std::sync::LazyLock;
+
+static FRIDA: LazyLock<Frida> = LazyLock::new(|| unsafe { Frida::obtain() });
+
+fn main() {
+    let device_manager = frida::DeviceManager::obtain(&FRIDA);
+    let local_device = device_manager.get_local_device();
+    let args: Vec<String> = std::env::args().collect();
+    let pid = args[1].parse::<u32>().unwrap();
+    let path = args[2].parse::<String>().unwrap();
+
+    if let Ok(mut device) = local_device {
+        println!("[*] Frida version: {}", frida::Frida::version());
+        println!("[*] Device name: {}", device.get_name());
+
+        let id = device
+            .inject_library_file_sync(pid, path, "injected_function", "w00t")
+            .unwrap();
+
+        println!("*** Injected, id={}", id);
+    }
+}