Added detection of getlogin() and getlogin_r().

config.h.in

@@ -272,6 +272,12 @@
 /* Define if you have the getgroups function.  */
 #undef HAVE_GETGROUPS
 
+/* Define if you have the getlogin function.  */
+#undef HAVE_GETLOGIN
+
+/* Define if you have the getlogin_r function.  */
+#undef HAVE_GETLOGIN_R
+
 /* Define if you have the getpgrp function.  */
 #undef HAVE_GETPGRP
 

configure.in

@@ -681,7 +681,8 @@ LIBS="$LIBS -ldl -ldld"], AC_MSG_RESULT(no))
 # checks for library functions
 AC_CHECK_FUNCS(alarm chown clock confstr ctermid ctermid_r dlopen execv \
  flock fork fsync fdatasync fpathconf ftime ftruncate \
- getgroups getpeername getpgrp getpid getpwent gettimeofday getwd \
+ getgroups getlogin getlogin_r getpeername getpgrp getpid getpwent \
+ gettimeofday getwd \
  kill link lstat mkfifo mktime nice pathconf pause plock pthread_init \
  putenv readlink \
  select setgid setlocale setuid setsid setpgid setpgrp setvbuf \