Initial commit

meta-google/recipes-extended/pam/libpam_%.bbappend

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+# Remove pwquality from PAM, to avoid breaking PAM and further dependencies
+# This allows pwquality to be neatly severed from the system.
+
+RDEPENDS:${PN}-runtime:remove:gbmc = "libpwquality"
+
+do_install:append:gbmc() {
+    # Remove reference to pwquality library from PAM config file
+    sed -i '/pam_pwquality.so/d' ${D}${sysconfdir}/pam.d/common-password
+
+    # Remove the first occurrence of "use_authtok" in the first line starting
+    # with "password". This makes sure that if pam_pwquality.so was the first
+    # entry, we didn't invalidate the next entry in the stack. If the first
+    # entry has the "use_authtok" set, this "forces the module to not prompt
+    # the user for a new password but use the one provided by the previously
+    # stacked password module". Since there is no "previous" entry, it never
+    # asks for a password which causes the process to fail.
+    awk '/^password/ && !f{sub(/ use_authtok/, ""); f=1} 1' \
+        ${D}${sysconfdir}/pam.d/common-password \
+        > ${D}${sysconfdir}/pam.d/common-password.new
+    mv ${D}${sysconfdir}/pam.d/common-password.new \
+        ${D}${sysconfdir}/pam.d/common-password
+}