From cd22d5605639ee6151b23c36d9f856e150d81769 Mon Sep 17 00:00:00 2001
From: lns <matzeton@googlemail.com>
Date: Wed, 19 Oct 2022 18:40:52 +0200
Subject: Add ArchLinux PKGBUILD.

Signed-off-by: lns <matzeton@googlemail.com>
---
 packages/archlinux/PKGBUILD  | 27 +++++++++++++++++++++++++++
 packages/archlinux/README.md |  4 ++++
 utils.c                      | 26 +++++++++++++++++++-------
 3 files changed, 50 insertions(+), 7 deletions(-)
 create mode 100644 packages/archlinux/PKGBUILD
 create mode 100644 packages/archlinux/README.md

diff --git a/packages/archlinux/PKGBUILD b/packages/archlinux/PKGBUILD
new file mode 100644
index 000000000..c7bdf673f
--- /dev/null
+++ b/packages/archlinux/PKGBUILD
@@ -0,0 +1,27 @@
+# Maintainer: Toni Uhlig <toni@impl.cc>
+
+pkgname=nDPId-testing
+pkgver=1.0
+pkgrel=1
+pkgdesc="Tiny nDPI based deep packet inspection daemons / toolkit."
+arch=('i686' 'x86_64')
+url="https://github.com/utoni/nDPId"
+license=('GPL3')
+options=()
+
+build() {
+	cd "${srcdir}/../../.."
+	mkdir -p build-archlinux && cd build-archlinux
+	cmake .. \
+		-DCMAKE_BUILD_TYPE=RelWithDebInfo \
+		-DCMAKE_INSTALL_PREFIX="/usr/local" \
+		-DBUILD_EXAMPLES=ON \
+		-DBUILD_NDPI=ON \
+		-DENABLE_SANITIZER=ON
+	make VERBOSE=1
+}
+
+package() {
+	cd "${srcdir}/../../../build-archlinux"
+	make DESTDIR="${pkgdir}/" install
+}
diff --git a/packages/archlinux/README.md b/packages/archlinux/README.md
new file mode 100644
index 000000000..62c30cfb6
--- /dev/null
+++ b/packages/archlinux/README.md
@@ -0,0 +1,4 @@
+HowTo use this
+==============
+
+Change to this directory and simply run `makepkg`, that's it.
diff --git a/utils.c b/utils.c
index 975a696bb..fc0472b7c 100644
--- a/utils.c
+++ b/utils.c
@@ -161,7 +161,7 @@ int change_user_group(char const * const user,
     pwd = getpwnam(user);
     if (pwd == NULL)
     {
-        return 1;
+        return -errno;
     }
 
     if (group != NULL)
@@ -170,7 +170,7 @@ int change_user_group(char const * const user,
         grp = getgrnam(group);
         if (grp == NULL)
         {
-            return 1;
+            return -errno;
         }
         gid = grp->gr_gid;
     }
@@ -181,17 +181,29 @@ int change_user_group(char const * const user,
 
     if (uds_collector_path != NULL)
     {
-        chmod(uds_collector_path, S_IRUSR | S_IWUSR);
-        chown(uds_collector_path, pwd->pw_uid, gid);
+        errno = 0;
+        if (chmod(uds_collector_path, S_IRUSR | S_IWUSR) != 0 ||
+            chown(uds_collector_path, pwd->pw_uid, gid) != 0)
+        {
+            return -errno;
+        }
     }
     if (uds_distributor_path != NULL)
     {
-        chmod(uds_distributor_path, S_IRUSR | S_IWUSR | S_IRGRP);
-        chown(uds_distributor_path, pwd->pw_uid, gid);
+        errno = 0;
+        if (chmod(uds_distributor_path, S_IRUSR | S_IWUSR | S_IRGRP) != 0 ||
+            chown(uds_distributor_path, pwd->pw_uid, gid) != 0)
+        {
+            return -errno;
+        }
     }
     if (pidfile != NULL)
     {
-        chown(pidfile, pwd->pw_uid, gid);
+        errno = 0;
+        if (chown(pidfile, pwd->pw_uid, gid) != 0)
+        {
+            return -errno;
+        }
     }
     return setregid(gid, gid) != 0 || setreuid(pwd->pw_uid, pwd->pw_uid);
 }
-- 
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