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Autoconf Macro: ac_raf_func_which_getservbyname_r
</title>
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<h1>
ac_raf_func_which_getservbyname_r
</h1>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AC_raf_FUNC_WHICH_GETSERVBYNAME_R</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
Provides a test to determine the correct way to call getservbyname_r:
</p>
<pre>
- defines HAVE_FUNC_GETSERVBYNAME_R_6 if it needs 6 arguments (e.g linux)
- defines HAVE_FUNC_GETSERVBYNAME_R_5 if it needs 5 arguments (e.g. solaris)
- defines HAVE_FUNC_GETSERVBYNAME_R_4 if it needs 4 arguments (e.g. osf/1)
</pre>
<p>
An example use can be found at http://raf.org/autoconf/net_getservbyname.c
</p>
<p>
Based on Caolan McNamara's gethostbyname_r macro. Based on David Arnold's
autoconf suggestion in the threads faq.
</p>
</div>
<h2>
Author
</h2>
<p class="indent">
raf <raf@raf.org>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2001-08-20
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
AC_DEFUN([AC_raf_FUNC_WHICH_GETSERVBYNAME_R],
[AC_CACHE_CHECK(for getservbyname_r, ac_cv_func_which_getservbyname_r, [
AC_CHECK_FUNC(getservbyname_r, [
AC_TRY_COMPILE([
# include <netdb.h>
], [
char *name;
char *proto;
struct servent *se;
struct servent_data data;
(void) getservbyname_r(name, proto, se, &data);
],ac_cv_func_which_getservbyname_r=four,
[
AC_TRY_COMPILE([
# include <netdb.h>
], [
char *name;
char *proto;
struct servent *se, *res;
char buffer[2048];
int buflen = 2048;
(void) getservbyname_r(name, proto, se, buffer, buflen, &res)
],ac_cv_func_which_getservbyname_r=six,
[
AC_TRY_COMPILE([
# include <netdb.h>
], [
char *name;
char *proto;
struct servent *se;
char buffer[2048];
int buflen = 2048;
(void) getservbyname_r(name, proto, se, buffer, buflen)
],ac_cv_func_which_getservbyname_r=five,ac_cv_func_which_getservbyname_r=no)
]
)
]
)]
,ac_cv_func_which_getservbyname_r=no)])
if test $ac_cv_func_which_getservbyname_r = six; then
AC_DEFINE(HAVE_FUNC_GETSERVBYNAME_R_6)
elif test $ac_cv_func_which_getservbyname_r = five; then
AC_DEFINE(HAVE_FUNC_GETSERVBYNAME_R_5)
elif test $ac_cv_func_which_getservbyname_r = four; then
AC_DEFINE(HAVE_FUNC_GETSERVBYNAME_R_4)
fi
])
</pre>
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