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dnl @synopsis AX_FUNC_WHICH_GETSPNAM_R
dnl
dnl Determines which historical variant of the getspnam_r() call
dnl (taking four or five arguments) is available on the system
dnl and sets NEW_SHADOW_API=YES if there are five arguments.
dnl
dnl Originally named "AX_FUNC_WHICH_GETHOSTBYNAME_R". Rewritten
dnl for AX_FUNC_WHICH_GETSPNAM_R
dnl
dnl @author Caolan McNamara <caolan@skynet.ie>
dnl @author Daniel Richard G. <skunk@iskunk.org>
dnl @version 2006-05-01
dnl @license LGPL
AC_DEFUN([AX_FUNC_WHICH_GETSPNAM_R], [
AC_LANG_PUSH(C)
AC_MSG_CHECKING([how many arguments getspnam_r() takes])
AC_CACHE_VAL(ac_cv_func_which_getspnam_r, [
################################################################
ac_cv_func_which_getspnam_r=unknown
#
# ONE ARGUMENT (sanity check)
#
# This should fail, as there is no variant of getspnam_r() that takes
# a single argument. If it actually compiles, then we can assume that
# netdb.h is not declaring the function, and the compiler is thereby
# assuming an implicit prototype. In which case, we're out of luck.
#
AC_COMPILE_IFELSE(
AC_LANG_PROGRAM(
[[
#include <sys/types.h>
#include <shadow.h>
]],
[[
const char *name = "myname";
getspnam_r(name) /* ; */
]]),
ac_cv_func_which_getspnam_r=no)
#
# FIVE ARGUMENTS
#
if test "$ac_cv_func_which_getspnam_r" = "unknown"; then
AC_COMPILE_IFELSE(
AC_LANG_PROGRAM(
[[
#include <sys/types.h>
#include <shadow.h>
]],
[[
char buffer[[]] = { '\0' };
struct spwd spwdStruct;
const char *name = "myname";
getspnam_r(name, &spwdStruct, buffer, sizeof buffer, 0) /* ; */
]]),
ac_cv_func_which_getspnam_r=five)
fi
#
# FOUR ARGUMENTS
#
if test "$ac_cv_func_which_getspnam_r" = "unknown"; then
AC_COMPILE_IFELSE(
AC_LANG_PROGRAM(
[[
#include <sys/types.h>
#include <shadow.h>
]],
[[
char buffer[[]] = { '\0' };
struct spwd spwdStruct;
const char *name = "myname";
getspnam_r(name, &spwdStruct, buffer, sizeof buffer) /* ; */
]]),
ac_cv_func_which_getspnam_r=four)
fi
################################################################
]) dnl end AC_CACHE_VAL
case "$ac_cv_func_which_getspnam_r" in
five)
AC_MSG_RESULT([five])
NEW_SHADOW_API=YES
;;
four)
AC_MSG_RESULT([four])
;;
no)
AC_MSG_RESULT([cannot find function declaration in shadow.h])
;;
unknown)
AC_MSG_RESULT([can't tell])
;;
*)
AC_MSG_ERROR([internal error])
;;
esac
AC_LANG_POP(C)
]) dnl end AC_DEFUN
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