From 99bb308e2cc1825be3647869cd690f04ad6fa726 Mon Sep 17 00:00:00 2001
From: clfreville2 <clement.freville2@etu.uca.fr>
Date: Thu, 20 Apr 2023 19:12:27 +0200
Subject: [PATCH] Initial commit

---
 .gitignore |  9 +++++++++
 Makefile   | 12 ++++++++++++
 fakeid     |  3 +++
 fakeid.c   | 20 ++++++++++++++++++++
 oki.toml   |  6 ++++++
 5 files changed, 50 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100755 fakeid
 create mode 100644 fakeid.c
 create mode 100644 oki.toml

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..87fa881
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+.idea
+.vscode
+
+oki-lock.toml
+oki-packages
+cmake-build-debug
+
+*.so
+*.out
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..d406d6a
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,12 @@
+CC := gcc
+CFLAGS := -std=c17 -Wall -Wextra -g
+
+CPPFLAGS := 
+LDLIBS := 
+
+fakeid.so: fakeid.c
+	$(CC) $(CFLAGS) -shared -fPIC -o fakeid.so fakeid.c
+
+.PHONY: clean
+clean:
+	rm -rf fakeid.so
diff --git a/fakeid b/fakeid
new file mode 100755
index 0000000..cad8a7d
--- /dev/null
+++ b/fakeid
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+LD_PRELOAD=$(dirname "$(readlink -f "$0")")/fakeid.so "$@"
diff --git a/fakeid.c b/fakeid.c
new file mode 100644
index 0000000..6bbd064
--- /dev/null
+++ b/fakeid.c
@@ -0,0 +1,20 @@
+#define _GNU_SOURCE
+
+#include <dlfcn.h>
+#include <string.h>
+#include <sys/types.h>
+#include <pwd.h>
+
+char *username = "alice";
+
+int getlogin_r(char *buf, size_t bufsize) {
+    strncpy(buf, username, bufsize);
+    return 0;
+}
+
+struct passwd *getpwuid(uid_t uid) {
+    struct passwd *(*getpwuid)(uid_t) = dlsym(RTLD_NEXT, "getpwuid");
+    struct passwd *pass = getpwuid(uid);
+    pass->pw_name = username;
+    return pass;
+}
diff --git a/oki.toml b/oki.toml
new file mode 100644
index 0000000..6f782ef
--- /dev/null
+++ b/oki.toml
@@ -0,0 +1,6 @@
+[package]
+name = "fakeid"
+version = "0.1.0"
+kind = "c"
+
+[dependencies]