From 1d1d3b59af50c40efcc74f9c3f37b446a921e83e Mon Sep 17 00:00:00 2001
From: Yousong Zhou <yszhou4tech@gmail.com>
Date: Wed, 17 Jun 2015 18:19:23 +0800
Subject: [PATCH] build: ignore pam_rhosts if neither ruserok nor ruserok_af is
 available.

* configure.ac: check for ruserok and ruserok_af
* modules/Makefile.am: ignore pam_rhosts/ if it's disabled
* modules/pam_rhosts/pam_rhosts.c: include stdlib.h for malloc and free

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
[Retrieved from:
https://github.com/linux-pam/linux-pam/commit/1d1d3b59af50c40efcc74f9c3f37b446a921e83e]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
 configure.ac                    |  5 ++++-
 modules/Makefile.am             | 11 ++++++++---
 modules/pam_rhosts/pam_rhosts.c |  1 +
 3 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index 3012ceb5..69748614 100644
--- a/configure.ac
+++ b/configure.ac
@@ -532,7 +532,10 @@ AC_CHECK_FUNCS(fseeko getdomainname gethostname gettimeofday lckpwdf mkdir selec
 AC_CHECK_FUNCS(strcspn strdup strspn strstr strtol uname)
 AC_CHECK_FUNCS(getutent_r getpwnam_r getpwuid_r getgrnam_r getgrgid_r getspnam_r)
 AC_CHECK_FUNCS(getgrouplist getline getdelim)
-AC_CHECK_FUNCS(inet_ntop inet_pton innetgr ruserok_af)
+AC_CHECK_FUNCS(inet_ntop inet_pton innetgr)
+AC_CHECK_FUNCS([ruserok_af ruserok], [break])
+
+AM_CONDITIONAL([COND_BUILD_PAM_RHOSTS], [test "$ac_cv_func_ruserok_af" = yes -o "$ac_cv_func_ruserok" = yes])
 
 AC_CHECK_FUNCS(unshare, [UNSHARE=yes], [UNSHARE=no])
 AM_CONDITIONAL([HAVE_UNSHARE], [test "$UNSHARE" = yes])
diff --git a/modules/Makefile.am b/modules/Makefile.am
index 0c80cea9..9ad26a9b 100644
--- a/modules/Makefile.am
+++ b/modules/Makefile.am
@@ -2,16 +2,21 @@
 # Copyright (c) 2005, 2006, 2008 Thorsten Kukuk <kukuk@thkukuk.de>
 #
 
-SUBDIRS = pam_access pam_cracklib pam_debug pam_deny pam_echo \
+if COND_BUILD_PAM_RHOSTS
+	MAYBE_PAM_RHOSTS = pam_rhosts
+endif
+
+SUBDIRS := pam_access pam_cracklib pam_debug pam_deny pam_echo \
 	pam_env pam_exec pam_faildelay pam_filter pam_ftp \
 	pam_group pam_issue pam_keyinit pam_lastlog pam_limits \
 	pam_listfile pam_localuser pam_loginuid pam_mail \
 	pam_mkhomedir pam_motd pam_namespace pam_nologin \
-	pam_permit pam_pwhistory pam_rhosts pam_rootok pam_securetty \
+	pam_permit pam_pwhistory pam_rootok pam_securetty \
 	pam_selinux pam_sepermit pam_shells pam_stress \
 	pam_succeed_if pam_tally pam_tally2 pam_time pam_timestamp \
 	pam_tty_audit pam_umask \
-	pam_unix pam_userdb pam_warn pam_wheel pam_xauth
+	pam_unix pam_userdb pam_warn pam_wheel pam_xauth \
+	$(MAYBE_PAM_RHOSTS)
 
 CLEANFILES = *~
 
diff --git a/modules/pam_rhosts/pam_rhosts.c b/modules/pam_rhosts/pam_rhosts.c
index ed98d630..60c9e854 100644
--- a/modules/pam_rhosts/pam_rhosts.c
+++ b/modules/pam_rhosts/pam_rhosts.c
@@ -35,6 +35,7 @@
 #include <pwd.h>
 #include <netdb.h>
 #include <string.h>
+#include <stdlib.h>
 #include <syslog.h>
 
 #define PAM_SM_AUTH  /* only defines this management group */