From cd5063555e92de8f273d92b35e64968e94205a6c Mon Sep 17 00:00:00 2001
From: Kenneth Myhra <kennethmyhra@gmail.com>
Date: Mon, 29 Nov 2021 22:03:19 +0100
Subject: [PATCH] LibCore: Add syscall wrapper for getpwnam()

---
 Userland/Libraries/LibCore/System.cpp | 18 ++++++++++++++++++
 Userland/Libraries/LibCore/System.h   |  2 ++
 2 files changed, 20 insertions(+)

diff --git a/Userland/Libraries/LibCore/System.cpp b/Userland/Libraries/LibCore/System.cpp
index bd6b00509a..500b39b39f 100644
--- a/Userland/Libraries/LibCore/System.cpp
+++ b/Userland/Libraries/LibCore/System.cpp
@@ -324,4 +324,22 @@ ErrorOr<void> chown(StringView pathname, uid_t uid, gid_t gid)
 #endif
 }
 
+ErrorOr<struct passwd> getpwnam(StringView name)
+{
+    ::setpwent();
+    if (errno)
+        return Error::from_syscall("getpwnam"sv, -errno);
+
+    while (auto* pw = ::getpwent()) {
+        if (errno)
+            return Error::from_syscall("getpwnam"sv, -errno);
+        if (pw->pw_name == name)
+            return *pw;
+    }
+    if (errno)
+        return Error::from_syscall("getpwnam"sv, -errno);
+    else
+        return Error::from_string_literal("getpwnam: Unknown username"sv);
+}
+
 }
diff --git a/Userland/Libraries/LibCore/System.h b/Userland/Libraries/LibCore/System.h
index dbf9d27026..f6f5db9a0b 100644
--- a/Userland/Libraries/LibCore/System.h
+++ b/Userland/Libraries/LibCore/System.h
@@ -8,6 +8,7 @@
 #pragma once
 
 #include <AK/Error.h>
+#include <pwd.h>
 #include <signal.h>
 #include <sys/stat.h>
 #include <termios.h>
@@ -45,5 +46,6 @@ ErrorOr<struct termios> tcgetattr(int fd);
 ErrorOr<void> tcsetattr(int fd, int optional_actions, struct termios const&);
 ErrorOr<void> chmod(StringView pathname, mode_t mode);
 ErrorOr<void> chown(StringView pathname, uid_t uid, gid_t gid);
+ErrorOr<struct passwd> getpwnam(StringView name);
 
 }