Import pam_1.1.8.orig.tar.gz

[dgit import orig pam_1.1.8.orig.tar.gz]

8 files changed, 1878 insertions, 0 deletions

diff --git a/modules/pam_exec/Makefile.am b/modules/pam_exec/Makefile.am
new file mode 100644
index 00000000..293c00ae
--- /dev/null
+++ b/modules/pam_exec/Makefile.am
@@ -0,0 +1,35 @@
+#
+# Copyright (c) 2006, 2009 Thorsten Kukuk <kukuk@suse.de>
+#
+
+CLEANFILES = *~
+MAINTAINERCLEANFILES = $(MANS) README
+
+EXTRA_DIST = README $(MANS) $(XMLS) tst-pam_exec
+
+man_MANS = pam_exec.8
+
+XMLS = README.xml pam_exec.8.xml
+
+securelibdir = $(SECUREDIR)
+secureconfdir = $(SCONFIGDIR)
+
+AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include
+AM_LDFLAGS = -no-undefined -avoid-version -module
+if HAVE_VERSIONING
+  AM_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
+endif
+
+securelib_LTLIBRARIES = pam_exec.la
+pam_exec_la_LIBADD = $(top_builddir)/libpam/libpam.la
+
+if ENABLE_REGENERATE_MAN
+
+noinst_DATA = README
+
+README: pam_exec.8.xml
+
+-include $(top_srcdir)/Make.xml.rules
+endif
+
+TESTS = tst-pam_exec
diff --git a/modules/pam_exec/Makefile.in b/modules/pam_exec/Makefile.in
new file mode 100644
index 00000000..09c1b6e2
--- /dev/null
+++ b/modules/pam_exec/Makefile.in
@@ -0,0 +1,756 @@
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+
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+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
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+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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+#
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+	  echo "rm -f \"$${dir}/so_locations\""; \
+	  rm -f "$${dir}/so_locations"; \
+	done
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+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	mkid -fID $$unique
+tags: TAGS
+
+TAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	set x; \
+	here=`pwd`; \
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: CTAGS
+CTAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+check-TESTS: $(TESTS)
+	@failed=0; all=0; xfail=0; xpass=0; skip=0; \
+	srcdir=$(srcdir); export srcdir; \
+	list=' $(TESTS) '; \
+	$(am__tty_colors); \
+	if test -n "$$list"; then \
+	  for tst in $$list; do \
+	    if test -f ./$$tst; then dir=./; \
+	    elif test -f $$tst; then dir=; \
+	    else dir="$(srcdir)/"; fi; \
+	    if $(TESTS_ENVIRONMENT) $${dir}$$tst; then \
+	      all=`expr $$all + 1`; \
+	      case " $(XFAIL_TESTS) " in \
+	      *[\ \	]$$tst[\ \	]*) \
+		xpass=`expr $$xpass + 1`; \
+		failed=`expr $$failed + 1`; \
+		col=$$red; res=XPASS; \
+	      ;; \
+	      *) \
+		col=$$grn; res=PASS; \
+	      ;; \
+	      esac; \
+	    elif test $$? -ne 77; then \
+	      all=`expr $$all + 1`; \
+	      case " $(XFAIL_TESTS) " in \
+	      *[\ \	]$$tst[\ \	]*) \
+		xfail=`expr $$xfail + 1`; \
+		col=$$lgn; res=XFAIL; \
+	      ;; \
+	      *) \
+		failed=`expr $$failed + 1`; \
+		col=$$red; res=FAIL; \
+	      ;; \
+	      esac; \
+	    else \
+	      skip=`expr $$skip + 1`; \
+	      col=$$blu; res=SKIP; \
+	    fi; \
+	    echo "$${col}$$res$${std}: $$tst"; \
+	  done; \
+	  if test "$$all" -eq 1; then \
+	    tests="test"; \
+	    All=""; \
+	  else \
+	    tests="tests"; \
+	    All="All "; \
+	  fi; \
+	  if test "$$failed" -eq 0; then \
+	    if test "$$xfail" -eq 0; then \
+	      banner="$$All$$all $$tests passed"; \
+	    else \
+	      if test "$$xfail" -eq 1; then failures=failure; else failures=failures; fi; \
+	      banner="$$All$$all $$tests behaved as expected ($$xfail expected $$failures)"; \
+	    fi; \
+	  else \
+	    if test "$$xpass" -eq 0; then \
+	      banner="$$failed of $$all $$tests failed"; \
+	    else \
+	      if test "$$xpass" -eq 1; then passes=pass; else passes=passes; fi; \
+	      banner="$$failed of $$all $$tests did not behave as expected ($$xpass unexpected $$passes)"; \
+	    fi; \
+	  fi; \
+	  dashes="$$banner"; \
+	  skipped=""; \
+	  if test "$$skip" -ne 0; then \
+	    if test "$$skip" -eq 1; then \
+	      skipped="($$skip test was not run)"; \
+	    else \
+	      skipped="($$skip tests were not run)"; \
+	    fi; \
+	    test `echo "$$skipped" | wc -c` -le `echo "$$banner" | wc -c` || \
+	      dashes="$$skipped"; \
+	  fi; \
+	  report=""; \
+	  if test "$$failed" -ne 0 && test -n "$(PACKAGE_BUGREPORT)"; then \
+	    report="Please report to $(PACKAGE_BUGREPORT)"; \
+	    test `echo "$$report" | wc -c` -le `echo "$$banner" | wc -c` || \
+	      dashes="$$report"; \
+	  fi; \
+	  dashes=`echo "$$dashes" | sed s/./=/g`; \
+	  if test "$$failed" -eq 0; then \
+	    echo "$$grn$$dashes"; \
+	  else \
+	    echo "$$red$$dashes"; \
+	  fi; \
+	  echo "$$banner"; \
+	  test -z "$$skipped" || echo "$$skipped"; \
+	  test -z "$$report" || echo "$$report"; \
+	  echo "$$dashes$$std"; \
+	  test "$$failed" -eq 0; \
+	else :; fi
+
+distdir: $(DISTFILES)
+	@list='$(MANS)'; if test -n "$$list"; then \
+	  list=`for p in $$list; do \
+	    if test -f $$p; then d=; else d="$(srcdir)/"; fi; \
+	    if test -f "$$d$$p"; then echo "$$d$$p"; else :; fi; done`; \
+	  if test -n "$$list" && \
+	    grep 'ab help2man is required to generate this page' $$list >/dev/null; then \
+	    echo "error: found man pages containing the \`missing help2man' replacement text:" >&2; \
+	    grep -l 'ab help2man is required to generate this page' $$list | sed 's/^/         /' >&2; \
+	    echo "       to fix them, install help2man, remove and regenerate the man pages;" >&2; \
+	    echo "       typically \`make maintainer-clean' will remove them" >&2; \
+	    exit 1; \
+	  else :; fi; \
+	else :; fi
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+	$(MAKE) $(AM_MAKEFLAGS) check-TESTS
+check: check-am
+all-am: Makefile $(LTLIBRARIES) $(MANS) $(DATA)
+installdirs:
+	for dir in "$(DESTDIR)$(securelibdir)" "$(DESTDIR)$(man8dir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	  install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	  `test -z '$(STRIP)' || \
+	    echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install
+mostlyclean-generic:
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+	-test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES)
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-securelibLTLIBRARIES \
+	mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-man install-securelibLTLIBRARIES
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man: install-man8
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-man uninstall-securelibLTLIBRARIES
+
+uninstall-man: uninstall-man8
+
+.MAKE: check-am install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-TESTS check-am clean \
+	clean-generic clean-libtool clean-securelibLTLIBRARIES ctags \
+	distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-man8 install-pdf \
+	install-pdf-am install-ps install-ps-am \
+	install-securelibLTLIBRARIES install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags uninstall uninstall-am uninstall-man uninstall-man8 \
+	uninstall-securelibLTLIBRARIES
+
+
+@ENABLE_REGENERATE_MAN_TRUE@README: pam_exec.8.xml
+
+@ENABLE_REGENERATE_MAN_TRUE@-include $(top_srcdir)/Make.xml.rules
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/modules/pam_exec/README b/modules/pam_exec/README
new file mode 100644
index 00000000..7e578ef1
--- /dev/null
+++ b/modules/pam_exec/README
@@ -0,0 +1,73 @@
+pam_exec — PAM module which calls an external command
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+DESCRIPTION
+
+pam_exec is a PAM module that can be used to run an external command.
+
+The child's environment is set to the current PAM environment list, as returned
+by pam_getenvlist(3) In addition, the following PAM items are exported as
+environment variables: PAM_RHOST, PAM_RUSER, PAM_SERVICE, PAM_TTY, PAM_USER and
+PAM_TYPE, which contains one of the module types: account, auth, password,
+open_session and close_session.
+
+Commands called by pam_exec need to be aware of that the user can have controll
+over the environment.
+
+OPTIONS
+
+debug
+
+    Print debug information.
+
+expose_authtok
+
+    During authentication the calling command can read the password from stdin
+    (3).
+
+log=file
+
+    The output of the command is appended to file
+
+type=type
+
+    Only run the command if the module type matches the given type.
+
+stdout
+
+    Per default the output of the executed command is written to /dev/null.
+    With this option, the stdout output of the executed command is redirected
+    to the calling application. It's in the responsibility of this application
+    what happens with the output. The log option is ignored.
+
+quiet
+
+    Per default pam_exec.so will echo the exit status of the external command
+    if it fails. Specifying this option will suppress the message.
+
+seteuid
+
+    Per default pam_exec.so will execute the external command with the real
+    user ID of the calling process. Specifying this option means the command is
+    run with the effective user ID.
+
+EXAMPLES
+
+Add the following line to /etc/pam.d/passwd to rebuild the NIS database after
+each local password change:
+
+        password optional pam_exec.so seteuid /usr/bin/make -C /var/yp
+
+
+This will execute the command
+
+make -C /var/yp
+
+with effective user ID.
+
+AUTHOR
+
+pam_exec was written by Thorsten Kukuk <kukuk@thkukuk.de> and Josh Triplett
+<josh@joshtriplett.org>.
+
diff --git a/modules/pam_exec/README.xml b/modules/pam_exec/README.xml
new file mode 100644
index 00000000..5e76cab3
--- /dev/null
+++ b/modules/pam_exec/README.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding='UTF-8'?>
+<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
+"http://www.docbook.org/xml/4.3/docbookx.dtd"
+[
+<!--
+<!ENTITY pamaccess SYSTEM "pam_exec.8.xml">
+-->
+]>
+
+<article>
+
+  <articleinfo>
+
+    <title>
+      <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+      href="pam_exec.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_exec-name"]/*)'/>
+    </title>
+
+  </articleinfo>
+
+  <section>
+    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+      href="pam_exec.8.xml" xpointer='xpointer(//refsect1[@id = "pam_exec-description"]/*)'/>
+  </section>
+
+  <section>
+    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+      href="pam_exec.8.xml" xpointer='xpointer(//refsect1[@id = "pam_exec-options"]/*)'/>
+  </section>
+
+  <section>
+    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+      href="pam_exec.8.xml" xpointer='xpointer(//refsect1[@id = "pam_exec-examples"]/*)'/>
+  </section>
+
+  <section>
+    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+      href="pam_exec.8.xml" xpointer='xpointer(//refsect1[@id = "pam_exec-author"]/*)'/>
+  </section>
+
+</article>
diff --git a/modules/pam_exec/pam_exec.8 b/modules/pam_exec/pam_exec.8
new file mode 100644
index 00000000..6d066236
--- /dev/null
+++ b/modules/pam_exec/pam_exec.8
@@ -0,0 +1,166 @@
+'\" t
+.\"     Title: pam_exec
+.\"    Author: [see the "AUTHOR" section]
+.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
+.\"      Date: 09/19/2013
+.\"    Manual: Linux-PAM Manual
+.\"    Source: Linux-PAM Manual
+.\"  Language: English
+.\"
+.TH "PAM_EXEC" "8" "09/19/2013" "Linux-PAM Manual" "Linux\-PAM Manual"
+.\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el       .ds Aq '
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "NAME"
+pam_exec \- PAM module which calls an external command
+.SH "SYNOPSIS"
+.HP \w'\fBpam_exec\&.so\fR\ 'u
+\fBpam_exec\&.so\fR [debug] [expose_authtok] [seteuid] [quiet] [stdout] [log=\fIfile\fR] [type=\fItype\fR] \fIcommand\fR [\fI\&.\&.\&.\fR]
+.SH "DESCRIPTION"
+.PP
+pam_exec is a PAM module that can be used to run an external command\&.
+.PP
+The child\*(Aqs environment is set to the current PAM environment list, as returned by
+\fBpam_getenvlist\fR(3)
+In addition, the following PAM items are exported as environment variables:
+\fIPAM_RHOST\fR,
+\fIPAM_RUSER\fR,
+\fIPAM_SERVICE\fR,
+\fIPAM_TTY\fR,
+\fIPAM_USER\fR
+and
+\fIPAM_TYPE\fR, which contains one of the module types:
+\fBaccount\fR,
+\fBauth\fR,
+\fBpassword\fR,
+\fBopen_session\fR
+and
+\fBclose_session\fR\&.
+.PP
+Commands called by pam_exec need to be aware of that the user can have controll over the environment\&.
+.SH "OPTIONS"
+.PP
+.PP
+\fBdebug\fR
+.RS 4
+Print debug information\&.
+.RE
+.PP
+\fBexpose_authtok\fR
+.RS 4
+During authentication the calling command can read the password from
+\fBstdin\fR(3)\&.
+.RE
+.PP
+\fBlog=\fR\fB\fIfile\fR\fR
+.RS 4
+The output of the command is appended to
+file
+.RE
+.PP
+\fBtype=\fR\fB\fItype\fR\fR
+.RS 4
+Only run the command if the module type matches the given type\&.
+.RE
+.PP
+\fBstdout\fR
+.RS 4
+Per default the output of the executed command is written to
+/dev/null\&. With this option, the stdout output of the executed command is redirected to the calling application\&. It\*(Aqs in the responsibility of this application what happens with the output\&. The
+\fBlog\fR
+option is ignored\&.
+.RE
+.PP
+\fBquiet\fR
+.RS 4
+Per default pam_exec\&.so will echo the exit status of the external command if it fails\&. Specifying this option will suppress the message\&.
+.RE
+.PP
+\fBseteuid\fR
+.RS 4
+Per default pam_exec\&.so will execute the external command with the real user ID of the calling process\&. Specifying this option means the command is run with the effective user ID\&.
+.RE
+.SH "MODULE TYPES PROVIDED"
+.PP
+All module types (\fBauth\fR,
+\fBaccount\fR,
+\fBpassword\fR
+and
+\fBsession\fR) are provided\&.
+.SH "RETURN VALUES"
+.PP
+.PP
+PAM_SUCCESS
+.RS 4
+The external command was run successfully\&.
+.RE
+.PP
+PAM_SERVICE_ERR
+.RS 4
+No argument or a wrong number of arguments were given\&.
+.RE
+.PP
+PAM_SYSTEM_ERR
+.RS 4
+A system error occurred or the command to execute failed\&.
+.RE
+.PP
+PAM_IGNORE
+.RS 4
+\fBpam_setcred\fR
+was called, which does not execute the command\&. Or, the value given for the type= parameter did not match the module type\&.
+.RE
+.SH "EXAMPLES"
+.PP
+Add the following line to
+/etc/pam\&.d/passwd
+to rebuild the NIS database after each local password change:
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+        password optional pam_exec\&.so seteuid /usr/bin/make \-C /var/yp
+      
+.fi
+.if n \{\
+.RE
+.\}
+.sp
+This will execute the command
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+make \-C /var/yp
+.fi
+.if n \{\
+.RE
+.\}
+.sp
+with effective user ID\&.
+.SH "SEE ALSO"
+.PP
+\fBpam.conf\fR(5),
+\fBpam.d\fR(5),
+\fBpam\fR(8)
+.SH "AUTHOR"
+.PP
+pam_exec was written by Thorsten Kukuk <kukuk@thkukuk\&.de> and Josh Triplett <josh@joshtriplett\&.org>\&.
diff --git a/modules/pam_exec/pam_exec.8.xml b/modules/pam_exec/pam_exec.8.xml
new file mode 100644
index 00000000..23793668
--- /dev/null
+++ b/modules/pam_exec/pam_exec.8.xml
@@ -0,0 +1,273 @@
+<?xml version="1.0" encoding='UTF-8'?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
+	"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
+
+<refentry id="pam_exec">
+
+  <refmeta>
+    <refentrytitle>pam_exec</refentrytitle>
+    <manvolnum>8</manvolnum>
+    <refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo>
+  </refmeta>
+
+  <refnamediv id="pam_exec-name">
+    <refname>pam_exec</refname>
+    <refpurpose>PAM module which calls an external command</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <cmdsynopsis id="pam_exec-cmdsynopsis">
+      <command>pam_exec.so</command>
+      <arg choice="opt">
+	debug
+      </arg>
+      <arg choice="opt">
+         expose_authtok
+      </arg>
+      <arg choice="opt">
+        seteuid
+      </arg>
+      <arg choice="opt">
+        quiet
+      </arg>
+      <arg choice="opt">
+        stdout
+      </arg>
+      <arg choice="opt">
+        log=<replaceable>file</replaceable>
+      </arg>
+      <arg choice="opt">
+        type=<replaceable>type</replaceable>
+      </arg>
+      <arg choice="plain">
+       <replaceable>command</replaceable>
+      </arg>
+      <arg choice="opt">
+        <replaceable>...</replaceable>
+      </arg>
+    </cmdsynopsis>
+  </refsynopsisdiv>
+
+  <refsect1 id="pam_exec-description">
+
+    <title>DESCRIPTION</title>
+
+    <para>
+      pam_exec is a PAM module that can be used to run
+      an external command.
+    </para>
+
+    <para>
+     The child's environment is set to the current PAM environment list, as
+     returned by
+     <citerefentry>
+        <refentrytitle>pam_getenvlist</refentrytitle><manvolnum>3</manvolnum>
+     </citerefentry>
+     In addition, the following PAM items are
+     exported as environment variables: <emphasis>PAM_RHOST</emphasis>,
+     <emphasis>PAM_RUSER</emphasis>, <emphasis>PAM_SERVICE</emphasis>,
+     <emphasis>PAM_TTY</emphasis>, <emphasis>PAM_USER</emphasis> and
+     <emphasis>PAM_TYPE</emphasis>, which contains one of the module
+     types: <option>account</option>, <option>auth</option>,
+     <option>password</option>, <option>open_session</option> and
+     <option>close_session</option>.
+    </para>
+
+    <para>
+      Commands called by pam_exec need to be aware of that the user
+      can have controll over the environment.
+    </para>
+
+  </refsect1>
+
+  <refsect1 id="pam_exec-options">
+
+    <title>OPTIONS</title>
+    <para>
+      <variablelist>
+
+        <varlistentry>
+          <term>
+            <option>debug</option>
+          </term>
+          <listitem>
+            <para>
+	      Print debug information.
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry>
+          <term>
+            <option>expose_authtok</option>
+          </term>
+          <listitem>
+            <para>
+              During authentication the calling command can read
+              the password from <citerefentry>
+              <refentrytitle>stdin</refentrytitle><manvolnum>3</manvolnum>
+              </citerefentry>.
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry>
+          <term>
+            <option>log=<replaceable>file</replaceable></option>
+          </term>
+          <listitem>
+            <para>
+	      The output of the command is appended to
+              <filename>file</filename>
+            </para>
+          </listitem>
+	</varlistentry>
+
+        <varlistentry>
+          <term>
+            <option>type=<replaceable>type</replaceable></option>
+          </term>
+          <listitem>
+            <para>
+              Only run the command if the module type matches the given type.
+            </para>
+          </listitem>
+	</varlistentry>
+
+        <varlistentry>
+          <term>
+            <option>stdout</option>
+          </term>
+          <listitem>
+            <para>
+              Per default the output of the executed command is written to <filename>/dev/null</filename>. With this option, the stdout output of the executed command is redirected to the calling application. It's in the responsibility of this application what happens with the output. The <option>log</option> option is ignored.
+            </para>
+          </listitem>
+       </varlistentry>
+
+        <varlistentry>
+          <term>
+            <option>quiet</option>
+          </term>
+          <listitem>
+            <para>
+              Per default pam_exec.so will echo the exit status of the
+              external command if it fails.
+              Specifying this option will suppress the message.
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry>
+          <term>
+            <option>seteuid</option>
+          </term>
+          <listitem>
+            <para>
+              Per default pam_exec.so will execute the external command
+              with the real user ID of the calling process.
+              Specifying this option means the command is run
+              with the effective user ID.
+            </para>
+          </listitem>
+        </varlistentry>
+
+      </variablelist>
+
+    </para>
+  </refsect1>
+
+  <refsect1 id="pam_exec-types">
+    <title>MODULE TYPES PROVIDED</title>
+    <para>
+      All module types (<option>auth</option>, <option>account</option>,
+      <option>password</option> and <option>session</option>) are provided.
+    </para>
+  </refsect1>
+
+  <refsect1 id='pam_exec-return_values'>
+    <title>RETURN VALUES</title>
+    <para>
+      <variablelist>
+
+        <varlistentry>
+          <term>PAM_SUCCESS</term>
+          <listitem>
+            <para>
+              The external command was run successfully.
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry>
+          <term>PAM_SERVICE_ERR</term>
+          <listitem>
+            <para>
+	      No argument or a wrong number of arguments were given.
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry>
+          <term>PAM_SYSTEM_ERR</term>
+          <listitem>
+            <para>
+	      A system error occurred or the command to execute failed.
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry>
+          <term>PAM_IGNORE</term>
+          <listitem>
+            <para>
+	      <function>pam_setcred</function> was called, which
+	      does not execute the command.  Or, the value given for the type=
+	      parameter did not match the module type.
+            </para>
+          </listitem>
+        </varlistentry>
+
+      </variablelist>
+    </para>
+  </refsect1>
+
+  <refsect1 id='pam_exec-examples'>
+    <title>EXAMPLES</title>
+    <para>
+      Add the following line to <filename>/etc/pam.d/passwd</filename> to
+      rebuild the NIS database after each local password change:
+      <programlisting>
+        password optional pam_exec.so seteuid /usr/bin/make -C /var/yp
+      </programlisting>
+
+      This will execute the command
+      <programlisting>make -C /var/yp</programlisting>
+       with effective user ID.
+    </para>
+  </refsect1>
+
+  <refsect1 id='pam_exec-see_also'>
+    <title>SEE ALSO</title>
+    <para>
+      <citerefentry>
+	<refentrytitle>pam.conf</refentrytitle><manvolnum>5</manvolnum>
+      </citerefentry>,
+      <citerefentry>
+	<refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum>
+      </citerefentry>,
+      <citerefentry>
+	<refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum>
+      </citerefentry>
+    </para>
+  </refsect1>
+
+  <refsect1 id='pam_exec-author'>
+    <title>AUTHOR</title>
+      <para>
+        pam_exec was written by Thorsten Kukuk &lt;kukuk@thkukuk.de&gt; and
+        Josh Triplett &lt;josh@joshtriplett.org&gt;.
+      </para>
+  </refsect1>
+
+</refentry>
diff --git a/modules/pam_exec/pam_exec.c b/modules/pam_exec/pam_exec.c
new file mode 100644
index 00000000..b56e4b26
--- /dev/null
+++ b/modules/pam_exec/pam_exec.c
@@ -0,0 +1,532 @@
+/*
+ * Copyright (c) 2006, 2008 Thorsten Kukuk <kukuk@thkukuk.de>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, and the entire permission notice in its entirety,
+ *    including the disclaimer of warranties.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * ALTERNATIVELY, this product may be distributed under the terms of
+ * the GNU Public License, in which case the provisions of the GPL are
+ * required INSTEAD OF the above restrictions.  (This clause is
+ * necessary due to a potential bad interaction between the GPL and
+ * the restrictions contained in a BSD-style copyright.)
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
+
+#include <time.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <syslog.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+
+#define PAM_SM_AUTH
+#define PAM_SM_ACCOUNT
+#define PAM_SM_SESSION
+#define PAM_SM_PASSWORD
+
+#include <security/pam_modules.h>
+#include <security/pam_modutil.h>
+#include <security/pam_ext.h>
+#include <security/_pam_macros.h>
+
+#define ENV_ITEM(n) { (n), #n }
+static struct {
+  int item;
+  const char *name;
+} env_items[] = {
+  ENV_ITEM(PAM_SERVICE),
+  ENV_ITEM(PAM_USER),
+  ENV_ITEM(PAM_TTY),
+  ENV_ITEM(PAM_RHOST),
+  ENV_ITEM(PAM_RUSER),
+};
+
+/* move_fd_to_non_stdio copies the given file descriptor to something other
+ * than stdin, stdout, or stderr.  Assumes that the caller will close all
+ * unwanted fds after calling. */
+static int
+move_fd_to_non_stdio (pam_handle_t *pamh, int fd)
+{
+  while (fd < 3)
+    {
+      fd = dup(fd);
+      if (fd == -1)
+	{
+	  int err = errno;
+	  pam_syslog (pamh, LOG_ERR, "dup failed: %m");
+	  _exit (err);
+	}
+    }
+  return fd;
+}
+
+static int
+call_exec (const char *pam_type, pam_handle_t *pamh,
+	   int argc, const char **argv)
+{
+  int debug = 0;
+  int call_setuid = 0;
+  int quiet = 0;
+  int expose_authtok = 0;
+  int use_stdout = 0;
+  int optargc;
+  const char *logfile = NULL;
+  const char *authtok = NULL;
+  pid_t pid;
+  int fds[2];
+  int stdout_fds[2];
+  FILE *stdout_file = NULL;
+
+  if (argc < 1) {
+    pam_syslog (pamh, LOG_ERR,
+		"This module needs at least one argument");
+    return PAM_SERVICE_ERR;
+  }
+
+  for (optargc = 0; optargc < argc; optargc++)
+    {
+      if (argv[optargc][0] == '/') /* paths starts with / */
+	break;
+
+      if (strcasecmp (argv[optargc], "debug") == 0)
+	debug = 1;
+      else if (strcasecmp (argv[optargc], "stdout") == 0)
+	use_stdout = 1;
+      else if (strncasecmp (argv[optargc], "log=", 4) == 0)
+	logfile = &argv[optargc][4];
+      else if (strncasecmp (argv[optargc], "type=", 5) == 0)
+	{
+	  if (strcmp (pam_type, &argv[optargc][5]) != 0)
+	    return PAM_IGNORE;
+	}
+      else if (strcasecmp (argv[optargc], "seteuid") == 0)
+	call_setuid = 1;
+      else if (strcasecmp (argv[optargc], "quiet") == 0)
+	quiet = 1;
+      else if (strcasecmp (argv[optargc], "expose_authtok") == 0)
+	expose_authtok = 1;
+      else
+	break; /* Unknown option, assume program to execute. */
+    }
+
+  if (expose_authtok == 1)
+    {
+      if (strcmp (pam_type, "auth") != 0)
+	{
+	  pam_syslog (pamh, LOG_ERR,
+		      "expose_authtok not supported for type %s", pam_type);
+	  expose_authtok = 0;
+	}
+      else
+	{
+	  const void *void_pass;
+	  int retval;
+
+	  retval = pam_get_item (pamh, PAM_AUTHTOK, &void_pass);
+	  if (retval != PAM_SUCCESS)
+	    {
+	      if (debug)
+		pam_syslog (pamh, LOG_DEBUG,
+			    "pam_get_item (PAM_AUTHTOK) failed, return %d",
+			    retval);
+	      return retval;
+	    }
+	  else if (void_pass == NULL)
+	    {
+	      char *resp = NULL;
+
+	      retval = pam_prompt (pamh, PAM_PROMPT_ECHO_OFF,
+				   &resp, _("Password: "));
+
+	      if (retval != PAM_SUCCESS)
+		{
+		  _pam_drop (resp);
+		  if (retval == PAM_CONV_AGAIN)
+		    retval = PAM_INCOMPLETE;
+		  return retval;
+		}
+
+	      pam_set_item (pamh, PAM_AUTHTOK, resp);
+	      authtok = strdupa (resp);
+	      _pam_drop (resp);
+	    }
+	  else
+	    authtok = void_pass;
+
+	  if (pipe(fds) != 0)
+	    {
+	      pam_syslog (pamh, LOG_ERR, "Could not create pipe: %m");
+	      return PAM_SYSTEM_ERR;
+	    }
+	}
+    }
+
+  if (use_stdout)
+    {
+      if (pipe(stdout_fds) != 0)
+	{
+	  pam_syslog (pamh, LOG_ERR, "Could not create pipe: %m");
+	  return PAM_SYSTEM_ERR;
+	}
+      stdout_file = fdopen(stdout_fds[0], "r");
+      if (!stdout_file)
+	{
+	  pam_syslog (pamh, LOG_ERR, "Could not fdopen pipe: %m");
+	  return PAM_SYSTEM_ERR;
+	}
+    }
+
+  if (optargc >= argc) {
+    pam_syslog (pamh, LOG_ERR, "No path given as argument");
+    return PAM_SERVICE_ERR;
+  }
+
+  pid = fork();
+  if (pid == -1)
+    return PAM_SYSTEM_ERR;
+  if (pid > 0) /* parent */
+    {
+      int status = 0;
+      pid_t retval;
+
+      if (expose_authtok) /* send the password to the child */
+	{
+	  if (authtok != NULL)
+	    {            /* send the password to the child */
+	      if (debug)
+		pam_syslog (pamh, LOG_DEBUG, "send password to child");
+	      if (write(fds[1], authtok, strlen(authtok)+1) == -1)
+		pam_syslog (pamh, LOG_ERR,
+			    "sending password to child failed: %m");
+	      authtok = NULL;
+	    }
+	  else
+	    {
+	      if (write(fds[1], "", 1) == -1)   /* blank password */
+		pam_syslog (pamh, LOG_ERR,
+			    "sending password to child failed: %m");
+	    }
+        close(fds[0]);       /* close here to avoid possible SIGPIPE above */
+        close(fds[1]);
+	}
+
+      if (use_stdout)
+	{
+	  char buf[4096];
+	  close(stdout_fds[1]);
+	  while (fgets(buf, sizeof(buf), stdout_file) != NULL)
+	    {
+	      size_t len;
+	      len = strlen(buf);
+	      if (buf[len-1] == '\n')
+		buf[len-1] = '\0';
+	      pam_info(pamh, "%s", buf);
+	    }
+	  fclose(stdout_file);
+	}
+
+      while ((retval = waitpid (pid, &status, 0)) == -1 &&
+	     errno == EINTR);
+      if (retval == (pid_t)-1)
+	{
+	  pam_syslog (pamh, LOG_ERR, "waitpid returns with -1: %m");
+	  return PAM_SYSTEM_ERR;
+	}
+      else if (status != 0)
+	{
+	  if (WIFEXITED(status))
+	    {
+	      pam_syslog (pamh, LOG_ERR, "%s failed: exit code %d",
+			  argv[optargc], WEXITSTATUS(status));
+		if (!quiet)
+	      pam_error (pamh, _("%s failed: exit code %d"),
+			 argv[optargc], WEXITSTATUS(status));
+	    }
+	  else if (WIFSIGNALED(status))
+	    {
+	      pam_syslog (pamh, LOG_ERR, "%s failed: caught signal %d%s",
+			  argv[optargc], WTERMSIG(status),
+			  WCOREDUMP(status) ? " (core dumped)" : "");
+		if (!quiet)
+	      pam_error (pamh, _("%s failed: caught signal %d%s"),
+			 argv[optargc], WTERMSIG(status),
+			 WCOREDUMP(status) ? " (core dumped)" : "");
+	    }
+	  else
+	    {
+	      pam_syslog (pamh, LOG_ERR, "%s failed: unknown status 0x%x",
+			  argv[optargc], status);
+		if (!quiet)
+	      pam_error (pamh, _("%s failed: unknown status 0x%x"),
+			 argv[optargc], status);
+	    }
+	  return PAM_SYSTEM_ERR;
+	}
+      return PAM_SUCCESS;
+    }
+  else /* child */
+    {
+      char **arggv;
+      int i;
+      char **envlist, **tmp;
+      int envlen, nitems;
+      char *envstr;
+
+      /* First, move all the pipes off of stdin, stdout, and stderr, to ensure
+       * that calls to dup2 won't close them. */
+
+      if (expose_authtok)
+	{
+	  fds[0] = move_fd_to_non_stdio(pamh, fds[0]);
+	  close(fds[1]);
+	}
+
+      if (use_stdout)
+	{
+	  stdout_fds[1] = move_fd_to_non_stdio(pamh, stdout_fds[1]);
+	  close(stdout_fds[0]);
+	}
+
+      /* Set up stdin. */
+
+      if (expose_authtok)
+	{
+	  /* reopen stdin as pipe */
+	  if (dup2(fds[0], STDIN_FILENO) == -1)
+	    {
+	      int err = errno;
+	      pam_syslog (pamh, LOG_ERR, "dup2 of STDIN failed: %m");
+	      _exit (err);
+	    }
+	}
+      else
+	{
+	  close (STDIN_FILENO);
+
+	  /* New stdin.  */
+	  if ((i = open ("/dev/null", O_RDWR)) < 0)
+	    {
+	      int err = errno;
+	      pam_syslog (pamh, LOG_ERR, "open of /dev/null failed: %m");
+	      _exit (err);
+	    }
+	}
+
+      /* Set up stdout. */
+
+      if (use_stdout)
+	{
+	  if (dup2(stdout_fds[1], STDOUT_FILENO) == -1)
+	    {
+	      int err = errno;
+	      pam_syslog (pamh, LOG_ERR, "dup2 to stdout failed: %m");
+	      _exit (err);
+	    }
+	}
+      else if (logfile)
+	{
+	  time_t tm = time (NULL);
+	  char *buffer = NULL;
+
+	  close (STDOUT_FILENO);
+	  if ((i = open (logfile, O_CREAT|O_APPEND|O_WRONLY,
+			 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) == -1)
+	    {
+	      int err = errno;
+	      pam_syslog (pamh, LOG_ERR, "open of %s failed: %m",
+			  logfile);
+	      _exit (err);
+	    }
+	  if (asprintf (&buffer, "*** %s", ctime (&tm)) > 0)
+	    {
+	      pam_modutil_write (i, buffer, strlen (buffer));
+	      free (buffer);
+	    }
+	}
+      else
+	{
+	  close (STDOUT_FILENO);
+	  if ((i = open ("/dev/null", O_RDWR)) < 0)
+	    {
+	      int err = errno;
+	      pam_syslog (pamh, LOG_ERR, "open of /dev/null failed: %m");
+	      _exit (err);
+	    }
+	}
+
+      if (dup2 (STDOUT_FILENO, STDERR_FILENO) == -1)
+	{
+	  int err = errno;
+	  pam_syslog (pamh, LOG_ERR, "dup2 failed: %m");
+	  _exit (err);
+	}
+
+      for (i = 3; i < sysconf (_SC_OPEN_MAX); i++)
+	close (i);
+
+      if (call_setuid)
+	if (setuid (geteuid ()) == -1)
+	  {
+	    int err = errno;
+	    pam_syslog (pamh, LOG_ERR, "setuid(%lu) failed: %m",
+			(unsigned long) geteuid ());
+	    _exit (err);
+	  }
+
+      if (setsid () == -1)
+	{
+	  int err = errno;
+	  pam_syslog (pamh, LOG_ERR, "setsid failed: %m");
+	  _exit (err);
+	}
+
+      arggv = calloc (argc + 4, sizeof (char *));
+      if (arggv == NULL)
+	_exit (ENOMEM);
+
+      for (i = 0; i < (argc - optargc); i++)
+	arggv[i] = strdup(argv[i+optargc]);
+      arggv[i] = NULL;
+
+      /*
+       * Set up the child's environment list.  It consists of the PAM
+       * environment, plus a few hand-picked PAM items.
+       */
+      envlist = pam_getenvlist(pamh);
+      for (envlen = 0; envlist[envlen] != NULL; ++envlen)
+        /* nothing */ ;
+      nitems = sizeof(env_items) / sizeof(*env_items);
+      /* + 2 because of PAM_TYPE and NULL entry */
+      tmp = realloc(envlist, (envlen + nitems + 2) * sizeof(*envlist));
+      if (tmp == NULL)
+      {
+        free(envlist);
+        pam_syslog (pamh, LOG_ERR, "realloc environment failed: %m");
+        _exit (ENOMEM);
+      }
+      envlist = tmp;
+      for (i = 0; i < nitems; ++i)
+      {
+        const void *item;
+
+        if (pam_get_item(pamh, env_items[i].item, &item) != PAM_SUCCESS || item == NULL)
+          continue;
+        if (asprintf(&envstr, "%s=%s", env_items[i].name, (const char *)item) < 0)
+        {
+          free(envlist);
+          pam_syslog (pamh, LOG_ERR, "prepare environment failed: %m");
+          _exit (ENOMEM);
+        }
+        envlist[envlen++] = envstr;
+        envlist[envlen] = NULL;
+      }
+
+      if (asprintf(&envstr, "PAM_TYPE=%s", pam_type) < 0)
+        {
+          free(envlist);
+          pam_syslog (pamh, LOG_ERR, "prepare environment failed: %m");
+          _exit (ENOMEM);
+        }
+      envlist[envlen++] = envstr;
+      envlist[envlen] = NULL;
+
+      if (debug)
+	pam_syslog (pamh, LOG_DEBUG, "Calling %s ...", arggv[0]);
+
+      execve (arggv[0], arggv, envlist);
+      i = errno;
+      pam_syslog (pamh, LOG_ERR, "execve(%s,...) failed: %m", arggv[0]);
+      free(envlist);
+      _exit (i);
+    }
+  return PAM_SYSTEM_ERR; /* will never be reached. */
+}
+
+PAM_EXTERN int
+pam_sm_authenticate (pam_handle_t *pamh, int flags UNUSED,
+		     int argc, const char **argv)
+{
+  return call_exec ("auth", pamh, argc, argv);
+}
+
+PAM_EXTERN int
+pam_sm_setcred (pam_handle_t *pamh UNUSED, int flags UNUSED,
+		int argc UNUSED, const char **argv UNUSED)
+{
+  return PAM_IGNORE;
+}
+
+/* password updating functions */
+
+PAM_EXTERN int
+pam_sm_chauthtok(pam_handle_t *pamh, int flags,
+		 int argc, const char **argv)
+{
+  if (flags & PAM_PRELIM_CHECK)
+    return PAM_SUCCESS;
+  return call_exec ("password", pamh, argc, argv);
+}
+
+PAM_EXTERN int
+pam_sm_acct_mgmt(pam_handle_t *pamh, int flags UNUSED,
+		 int argc, const char **argv)
+{
+  return call_exec ("account", pamh, argc, argv);
+}
+
+PAM_EXTERN int
+pam_sm_open_session(pam_handle_t *pamh, int flags UNUSED,
+		    int argc, const char **argv)
+{
+  return call_exec ("open_session", pamh, argc, argv);
+}
+
+PAM_EXTERN int
+pam_sm_close_session(pam_handle_t *pamh, int flags UNUSED,
+		     int argc, const char **argv)
+{
+  return call_exec ("close_session", pamh, argc, argv);
+}
+
+#ifdef PAM_STATIC
+struct pam_module _pam_exec_modstruct = {
+  "pam_exec",
+  pam_sm_authenticate,
+  pam_sm_setcred,
+  pam_sm_acct_mgmt,
+  pam_sm_open_session,
+  pam_sm_close_session,
+  pam_sm_chauthtok,
+};
+#endif
diff --git a/modules/pam_exec/tst-pam_exec b/modules/pam_exec/tst-pam_exec
new file mode 100755
index 00000000..a0b00393
--- /dev/null
+++ b/modules/pam_exec/tst-pam_exec
@@ -0,0 +1,2 @@
+#!/bin/sh
+../../tests/tst-dlopen .libs/pam_exec.so