build-sys: disable login-utils if shadow.h or utmp.h is missing

Actually we could have also used UL_REQUIRES_LINUX because our
utmp usage and the shadow.h header is unlikely to be portable.
However only requiring these headers may help others who are
curious what needs to be done to port something.

Note, we could easily make the utmp stuff more portable by using
utmpx which is POSIX standard and on LINUX (glibc) basically just
renaming work. See getutxent(3).

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>

1 files changed, 21 insertions, 4 deletions

diff --git a/configure.ac b/configure.ac
index 5a62601f5..ed61706ef 100644
--- a/configure.ac
+++ b/configure.ac
@@ -256,6 +256,8 @@ AC_CHECK_HEADERS([ \
 	sys/ucred.h \
 	sys/un.h \
 	unistd.h \
+	shadow.h \
+	utmp.h \
 ])
 
 AC_CHECK_HEADERS([security/pam_misc.h],
@@ -285,6 +287,8 @@ have_linux_watchdog_h=$ac_cv_header_linux_watchdog_h
 have_security_pam_appl_h=$ac_cv_header_security_pam_appl_h
 have_security_pam_misc_h=$ac_cv_header_security_pam_misc_h
 have_security_openpam_h=$ac_cv_header_security_openpam_h
+have_shadow_h=$ac_cv_header_shadow_h
+have_utmp_h=$ac_cv_header_utmp_h
 
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <time.h>
@@ -1202,9 +1206,10 @@ AM_CONDITIONAL([BUILD_EJECT], [test "x$build_eject" = xyes])
 
 AC_ARG_ENABLE([agetty],
   AS_HELP_STRING([--disable-agetty], [do not build agetty]),
-  [], [UL_DEFAULT_ENABLE([agetty], [yes])]
+  [], [UL_DEFAULT_ENABLE([agetty], [check])]
 )
 UL_BUILD_INIT([agetty])
+UL_REQUIRES_HAVE([agetty], [utmp_h], [utmp.h header])
 AM_CONDITIONAL([BUILD_AGETTY], [test "x$build_agetty" = xyes])
 AS_IF([test "x$have_futimens" = xyes -a "x$have_inotify_init1" = xyes ], [
   AC_DEFINE([AGETTY_RELOAD], [1], [Enable agetty --reload feature])
@@ -1305,6 +1310,8 @@ AM_CONDITIONAL([BUILD_LSCPU], [test "x$build_lscpu" = xyes])
 
 UL_BUILD_INIT([lslogins], [check])
 UL_REQUIRES_BUILD([lslogins], [libsmartcols])
+UL_REQUIRES_HAVE([lslogins], [shadow_h], [shadow.h header])
+UL_REQUIRES_HAVE([lslogins], [utmp_h], [utmp.h header])
 AM_CONDITIONAL([BUILD_LSLOGINS], [test "x$build_lslogins" = xyes])
 
 
@@ -1524,14 +1531,16 @@ AC_ARG_ENABLE([last],
   [], [UL_DEFAULT_ENABLE([last], [check])]
 )
 UL_BUILD_INIT([last])
+UL_REQUIRES_HAVE([last], [utmp_h], [utmp.h header])
 AM_CONDITIONAL([BUILD_LAST], [test "x$build_last" = xyes])
 
 
 AC_ARG_ENABLE([utmpdump],
   AS_HELP_STRING([--disable-utmpdump], [do not build utmpdump]),
-  [], [UL_DEFAULT_ENABLE([utmpdump], [yes])]
+  [], [UL_DEFAULT_ENABLE([utmpdump], [check])]
 )
 UL_BUILD_INIT([utmpdump])
+UL_REQUIRES_HAVE([utmpdump], [utmp_h], [utmp.h header])
 AM_CONDITIONAL([BUILD_UTMPDUMP], [test "x$build_utmpdump" = xyes])
 
 
@@ -1582,6 +1591,7 @@ AC_ARG_ENABLE([vipw],
   [], [UL_DEFAULT_ENABLE([vipw], [no])]
 )
 UL_BUILD_INIT([vipw])
+UL_REQUIRES_HAVE([vipw], [shadow_h], [shadow.h header])
 AM_CONDITIONAL([BUILD_VIPW], [test "x$build_vipw" = xyes])
 
 
@@ -1623,6 +1633,7 @@ AC_ARG_ENABLE([chfn-chsh],
   [], [UL_DEFAULT_ENABLE([chfn_chsh], [check])]
 )
 UL_BUILD_INIT([chfn_chsh])
+UL_REQUIRES_HAVE([chfn_chsh], [shadow_h], [shadow.h header])
 
 AS_IF([test "x$enable_chfn_chsh_password" = xyes -o "x$have_user" = xyes], [
   UL_REQUIRES_HAVE([chfn_chsh], [security_pam_appl_h], [PAM header file])
@@ -1648,6 +1659,7 @@ AC_ARG_ENABLE([login],
 UL_BUILD_INIT([login])
 UL_REQUIRES_HAVE([login], [security_pam_appl_h], [PAM header file])
 UL_REQUIRES_HAVE([login], [security_pam_misc_h, security_openpam_h], [PAM conversation functions])
+UL_REQUIRES_HAVE([login], [utmp_h], [utmp.h header])
 AM_CONDITIONAL([BUILD_LOGIN], [test "x$build_login" = xyes])
 
 AC_ARG_ENABLE([login-chown-vcs],
@@ -1679,9 +1691,10 @@ AM_CONDITIONAL([BUILD_NOLOGIN], [test "x$build_nologin" = xyes])
 
 AC_ARG_ENABLE([sulogin],
   AS_HELP_STRING([--disable-sulogin], [do not build sulogin]),
-  [], [UL_DEFAULT_ENABLE([sulogin], [yes])]
+  [], [UL_DEFAULT_ENABLE([sulogin], [check])]
 )
 UL_BUILD_INIT([sulogin])
+UL_REQUIRES_HAVE([sulogin], [shadow_h], [shadow.h header])
 AM_CONDITIONAL([BUILD_SULOGIN], [test "x$build_sulogin" = xyes])
 
 
@@ -1691,6 +1704,7 @@ AC_ARG_ENABLE([su],
 )
 UL_BUILD_INIT([su])
 UL_REQUIRES_HAVE([su], [security_pam_appl_h], [PAM header file])
+UL_REQUIRES_HAVE([su], [utmp_h], [utmp.h header])
 AM_CONDITIONAL([BUILD_SU], [test "x$build_su" = xyes])
 
 
@@ -1700,6 +1714,7 @@ AC_ARG_ENABLE([runuser],
 )
 UL_BUILD_INIT([runuser])
 UL_REQUIRES_HAVE([runuser], [security_pam_appl_h], [PAM header file])
+UL_REQUIRES_HAVE([runuser], [utmp_h], [utmp.h header])
 AM_CONDITIONAL([BUILD_RUNUSER], [test "x$build_runuser" = xyes])
 
 
@@ -1794,9 +1809,10 @@ AS_IF([test "x$build_chrt" = xyes], [
 
 AC_ARG_ENABLE([wall],
   AS_HELP_STRING([--disable-wall], [do not build wall]),
-  [], [UL_DEFAULT_ENABLE([wall], [yes])]
+  [], [UL_DEFAULT_ENABLE([wall], [check])]
 )
 UL_BUILD_INIT([wall])
+UL_REQUIRES_HAVE([wall], [utmp_h], [utmp.h header])
 AM_CONDITIONAL([BUILD_WALL], [test "x$build_wall" = xyes])
 
 
@@ -1805,6 +1821,7 @@ AC_ARG_ENABLE([write],
   [], [UL_DEFAULT_ENABLE([write], [no])]
 )
 UL_BUILD_INIT([write])
+UL_REQUIRES_HAVE([write], [utmp_h], [utmp.h header])
 AM_CONDITIONAL([BUILD_WRITE], [test "x$build_write" = xyes])