Enable support for su applet

recipes/core/linux-pam.yaml

@@ -0,0 +1,39 @@
+inherit: [meson]
+
+metaEnvironment:
+    PKG_VERSION: "1.7.1"
+    PKG_LICENSE: BSD-3-Clause
+
+depends:
+    - libs::libxcrypt-dev
+
+    - use: []
+      depends:
+          - libs::libxcrypt-tgt
+
+checkoutSCM:
+    scm: url
+    url: "$GITHUB_MIRROR/linux-pam/linux-pam/releases/download/v${PKG_VERSION}/Linux-PAM-${PKG_VERSION}.tar.xz"
+    digestSHA256: "21dbcec6e01dd578f14789eac9024a18941e6f2702a05cf91b28c232eeb26ab0"
+    stripComponents: 1
+
+buildScript: |
+    mesonBuild "$1" \
+        -Ddocs=disabled \
+        -Dexamples=false \
+        -Disadir=/usr/lib/security \
+        -Dnis=disabled \
+        -Dpam_userdb=disabled
+
+multiPackage:
+    dev:
+        packageScript: mesonPackageDev
+        provideDeps: [ "*-dev" ]
+
+    tgt:
+        packageScript: |
+            mesonPackageTgt
+            install -m 0644 -D $<<linux-pam/login>> etc/pam.d/login
+            install -m 0644 -D $<<linux-pam/other>> etc/pam.d/other
+
+        provideDeps: [ "*-tgt" ]

recipes/core/linux-pam/login

@@ -0,0 +1,10 @@
+auth		required	pam_unix.so nullok
+
+account		required	pam_unix.so
+
+password	required	pam_unix.so nullok
+
+session		required	pam_limits.so
+session		required	pam_env.so
+session		required	pam_unix.so
+-session	optional	pam_systemd.so

recipes/core/linux-pam/other

@@ -0,0 +1,7 @@
+auth		required	pam_deny.so
+
+account		required	pam_deny.so
+
+password	required	pam_deny.so
+
+session		required	pam_deny.so

recipes/core/util-linux.yaml

@@ -7,6 +7,11 @@ metaEnvironment:
     PKG_LICENSE_PATH:
         util-linux:README.licensing
 
+Config:
+    UTIL_LINUX_SU:
+        type: bool
+        default: False
+
 depends:
     - libs::ncurses-dev
     - libs::zlib-dev
@@ -16,6 +21,12 @@ depends:
           - libs::ncurses-tgt
           - libs::zlib-tgt
 
+    - if: "$UTIL_LINUX_SU"
+      depends:
+          - core::linux-pam-dev
+          - use: []
+            name: core::linux-pam-tgt
+
 checkoutSCM:
     scm: url
     url: ${KERNEL_MIRROR}/linux/utils/util-linux/v${PKG_VERSION_MAJOR}/util-linux-${PKG_VERSION}.tar.xz