add --with-pam-service to specify PAM service name

Saves messing around with CFLAGS to do it.

auth-pam.c

@@ -66,6 +66,11 @@
 #include <pam/pam_appl.h>
 #endif
 
+#if !defined(SSHD_PAM_SERVICE)
+extern char *__progname;
+# define SSHD_PAM_SERVICE		__progname
+#endif
+
 /* OpenGroup RFC86.0 and XSSO specify no "const" on arguments */
 #ifdef PAM_SUN_CODEBASE
 # define sshpam_const		/* Solaris, HP-UX, SunOS */
@@ -615,7 +620,6 @@ sshpam_cleanup(void)
 static int
 sshpam_init(Authctxt *authctxt)
 {
-	extern char *__progname;
 	const char *pam_rhost, *pam_user, *user = authctxt->user;
 	const char **ptr_pam_user = &pam_user;
 	struct ssh *ssh = active_state; /* XXX */

auth-pam.h

@@ -27,10 +27,6 @@
 #include "includes.h"
 #ifdef USE_PAM
 
-#if !defined(SSHD_PAM_SERVICE)
-# define SSHD_PAM_SERVICE		__progname
-#endif
-
 void start_pam(Authctxt *);
 void finish_pam(void);
 u_int do_pam_account(void);

configure.ac

@@ -3047,6 +3047,17 @@ AC_ARG_WITH([pam],
 	]
 )
 
+AC_ARG_WITH([pam-service],
+	[  --with-pam-service=name Specify PAM service name ],
+	[
+		if test "x$withval" != "xno" && \
+		   test "x$withval" != "xyes" ; then
+			AC_DEFINE_UNQUOTED([SSHD_PAM_SERVICE],
+				["$withval"], [sshd PAM service name])
+		fi
+	]
+)
+
 # Check for older PAM
 if test "x$PAM_MSG" = "xyes" ; then
 	# Check PAM strerror arguments (old PAM)