@@ -1,5 +1,7 @@

 MODULEFLAGS = -fPIC -fno-stack-protector

 MODULEOBJS = dual_control.o

+MODULELIB = pam_dual_control.so

+

 .PHONY: all

 all: test dual_control.a

@@ -27,3 +29,8 @@ dual_control_test: dual_control_test.c $(MODULEOBJS)

 test: dual_control_test

 	@./dual_control_test > /dev/null

+.PHONY: install

+install: $(MODULEOBJS)

+	ld -x --shared -o @PAM_MODULE_DIRECTORY@/$(MODULELIB) $(MODULEOBJS)

+

+

@@ -587,6 +587,7 @@ PACKAGE_URL=''

 ac_unique_file="config.h.in"

 ac_subst_vars='LTLIBOBJS

 LIBOBJS

+PAM_MODULE_DIRECTORY

 OBJEXT

 EXEEXT

 ac_ct_CC

@@ -635,6 +636,7 @@ SHELL'

 ac_subst_files=''

 ac_user_opts='

 enable_option_checking

+with_pam_module_directory

 '

       ac_precious_vars='build_alias

 host_alias

@@ -1250,6 +1252,12 @@ if test -n "$ac_init_help"; then

    esac

   cat <<\_ACEOF

+Optional Packages:

+  --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]

+  --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)

+  --with-pam-module-directory=NAME

+        Use NAME as installation directory for PAM modules

+

 Some influential environment variables:

   CC          C compiler command

   CFLAGS      C compiler flags

@@ -2531,6 +2539,19 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu

 # Checks for library functions.

+# Implementation of the --with-pam-module-directory switch.

+DEFAULT_PAM_MODULE_DIRECTORY="${libdir}/security"

+

+# Check whether --with-pam-module-directory was given.

+if test "${with_pam_module_directory+set}" = set; then :

+  withval=$with_pam_module_directory; PAM_MODULE_DIRECTORY="$withval"

+else

+  PAM_MODULE_DIRECTORY="$DEFAULT_PAM_MODULE_DIRECTORY"

+fi

+

+

+

+

 ac_config_files="$ac_config_files Makefile"

 cat >confcache <<\_ACEOF

@@ -3805,3 +3826,33 @@ if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then

 $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}

 fi

+

+if test "$PAM_MODULE_DIRECTORY" = "$DEFAULT_PAM_MODULE_DIRECTORY"; then

+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING:

+        **

+        ** Warning: using default value ($DEFAULT_PAM_MODULE_DIRECTORY) as

+        **          installation directory for PAM module; this is probably not

+        **          what you want. Either use the configure flag

+        **

+        **                      --with-pam-module-directory=DIRECTORY

+        **

+        **          or copy the newly built pam_dual_control.so into the correct directory

+        **          manually. Usually PAM modules are located in /lib/security or /lib64/security.

+        **" >&5

+$as_echo "$as_me: WARNING:

+        **

+        ** Warning: using default value ($DEFAULT_PAM_MODULE_DIRECTORY) as

+        **          installation directory for PAM module; this is probably not

+        **          what you want. Either use the configure flag

+        **

+        **                      --with-pam-module-directory=DIRECTORY

+        **

+        **          or copy the newly built pam_dual_control.so into the correct directory

+        **          manually. Usually PAM modules are located in /lib/security or /lib64/security.

+        **" >&2;}

+else

+    { $as_echo "$as_me:${as_lineno-$LINENO}: PAM module installation directory: $PAM_MODULE_DIRECTORY" >&5

+$as_echo "$as_me: PAM module installation directory: $PAM_MODULE_DIRECTORY" >&6;}

+fi

+

+

@@ -17,5 +17,33 @@ AC_PROG_CC

 # Checks for library functions.

+# Implementation of the --with-pam-module-directory switch.

+DEFAULT_PAM_MODULE_DIRECTORY="${libdir}/security"

+AC_ARG_WITH(pam-module-directory,

+    [  --with-pam-module-directory=NAME

+        Use NAME as installation directory for PAM modules ],

+    PAM_MODULE_DIRECTORY="$withval",

+    PAM_MODULE_DIRECTORY="$DEFAULT_PAM_MODULE_DIRECTORY")

+AC_SUBST(PAM_MODULE_DIRECTORY)

+

+

 AC_CONFIG_FILES([Makefile])

 AC_OUTPUT

+

+if test "$PAM_MODULE_DIRECTORY" = "$DEFAULT_PAM_MODULE_DIRECTORY"; then

+    AC_MSG_WARN([

+        **

+        ** Warning: using default value ($DEFAULT_PAM_MODULE_DIRECTORY) as

+        **          installation directory for PAM module; this is probably not

+        **          what you want. Either use the configure flag

+        **

+        **                      --with-pam-module-directory=DIRECTORY

+        **

+        **          or copy the newly built pam_dual_control.so into the correct directory

+        **          manually. Usually PAM modules are located in /lib/security or /lib64/security.

+        **])

+else

+    AC_MSG_NOTICE([PAM module installation directory: $PAM_MODULE_DIRECTORY])

+fi

+

+