From bb4d81a4fae4069b3aebc4a13a92bdf6cb2547f1 Mon Sep 17 00:00:00 2001
From: Bananymous <bananymousosq@gmail.com>
Date: Sun, 11 Jun 2023 22:32:14 +0300
Subject: [PATCH] Userspace: Add basic id that prints {,e}{uid,gid} of the
 current proc

---
 userspace/CMakeLists.txt    |  1 +
 userspace/id/CMakeLists.txt | 16 ++++++++++++++++
 userspace/id/main.cpp       |  7 +++++++
 3 files changed, 24 insertions(+)
 create mode 100644 userspace/id/CMakeLists.txt
 create mode 100644 userspace/id/main.cpp

diff --git a/userspace/CMakeLists.txt b/userspace/CMakeLists.txt
index f4deddbf..0ce1bf16 100644
--- a/userspace/CMakeLists.txt
+++ b/userspace/CMakeLists.txt
@@ -5,6 +5,7 @@ project(userspace CXX)
 set(USERSPACE_PROJECTS
 	cat
 	echo
+	id
 	init
 	ls
 	Shell
diff --git a/userspace/id/CMakeLists.txt b/userspace/id/CMakeLists.txt
new file mode 100644
index 00000000..1cf2c33d
--- /dev/null
+++ b/userspace/id/CMakeLists.txt
@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.26)
+
+project(id CXX)
+
+set(SOURCES
+	main.cpp
+)
+
+add_executable(id ${SOURCES})
+target_compile_options(id PUBLIC -O2 -g)
+target_link_libraries(id PUBLIC libc)
+
+add_custom_target(id-install
+	COMMAND cp ${CMAKE_CURRENT_BINARY_DIR}/id ${BANAN_BIN}/
+	DEPENDS id
+)
diff --git a/userspace/id/main.cpp b/userspace/id/main.cpp
new file mode 100644
index 00000000..567be574
--- /dev/null
+++ b/userspace/id/main.cpp
@@ -0,0 +1,7 @@
+#include <stdio.h>
+#include <unistd.h>
+
+int main()
+{
+	printf("uid %u, gid %u, euid %u, egid %u\n", getuid(), getgid(), geteuid(), getegid());
+}