From a6aa048be01aecd5b1ea43f71afaf3b2c74ef429 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Tue, 15 Oct 2024 23:41:18 +0300
Subject: [PATCH] userspace: Implement `env` as an executable

---
 userspace/programs/CMakeLists.txt     |  1 +
 userspace/programs/env/CMakeLists.txt |  9 +++++++++
 userspace/programs/env/main.cpp       | 13 +++++++++++++
 3 files changed, 23 insertions(+)
 create mode 100644 userspace/programs/env/CMakeLists.txt
 create mode 100644 userspace/programs/env/main.cpp

diff --git a/userspace/programs/CMakeLists.txt b/userspace/programs/CMakeLists.txt
index a66a8a7b..7f1a7b61 100644
--- a/userspace/programs/CMakeLists.txt
+++ b/userspace/programs/CMakeLists.txt
@@ -8,6 +8,7 @@ set(USERSPACE_PROGRAMS
 	dhcp-client
 	DynamicLoader
 	echo
+	env
 	getopt
 	http-server
 	id
diff --git a/userspace/programs/env/CMakeLists.txt b/userspace/programs/env/CMakeLists.txt
new file mode 100644
index 00000000..39f69fa7
--- /dev/null
+++ b/userspace/programs/env/CMakeLists.txt
@@ -0,0 +1,9 @@
+set(SOURCES
+	main.cpp
+)
+
+add_executable(env ${SOURCES})
+banan_link_library(env ban)
+banan_link_library(env libc)
+
+install(TARGETS env OPTIONAL)
diff --git a/userspace/programs/env/main.cpp b/userspace/programs/env/main.cpp
new file mode 100644
index 00000000..0adaf42b
--- /dev/null
+++ b/userspace/programs/env/main.cpp
@@ -0,0 +1,13 @@
+#include <stdio.h>
+
+extern char** environ;
+
+int main()
+{
+	if (!environ)
+		return 0;
+	char** current = environ;
+	while (*current)
+			printf("%s\n", *current++);
+	return 0;
+}