Add support for systems with no innetgr(). On those systems, username

with an @ will be treated like any other username (i.e. lookup in the
local database for an user with an @). Thanks to Mike Frysinger for the
patch.

ChangeLog

@@ -1,3 +1,12 @@
+2007-11-16  Nicolas François  <nicolas.francois@centraliens.net>
+
+	* configure.in: Check if the netdb.h header file and the innetgr
+	function exist.
+	* src/login_nopam.c, NEWS: Add support for systems with no
+	innetgr().  On those systems, username with an @ will be treated
+	like any other username (i.e. lookup in the local database for an
+	user with an @). Thanks to Mike Frysinger for the patch.
+
 2007-11-16  Nicolas François  <nicolas.francois@centraliens.net>
 
 	* src/useradd.c: Indentation fix.

NEWS

@@ -15,6 +15,10 @@ shadow-4.0.18.1 -> shadow-4.0.18.2					UNRELEASED
 - newgrp.c: Declare the child and pid variable at the beginning of a block.
   This fixes a compilation issue with gcc 2.95. The intent is the same as
   Gentoo's patch shadow-4.0.12-gcc2.patch.
+- login_nopam: Add support for systems with no innetgr().  On those
+  systems, username with an @ will be treated like any other username
+  (i.e. lookup in the local database for an user with an @). Thanks to
+  Mike Frysinger for the patch.
 
 shadow-4.0.18.1 -> shadow-4.0.18.2					28-10-2007
 

configure.in

@@ -32,11 +32,11 @@ AC_HEADER_SYS_WAIT
 AC_CHECK_HEADERS(errno.h fcntl.h limits.h unistd.h sys/time.h utmp.h \
 	utmpx.h termios.h termio.h sgtty.h sys/ioctl.h syslog.h paths.h \
 	utime.h ulimit.h sys/resource.h gshadow.h shadow.h lastlog.h \
-	locale.h rpc/key_prot.h)
+	locale.h rpc/key_prot.h netdb.h)
 
 AC_CHECK_FUNCS(a64l fchmod fchown fsync getgroups gethostname getspnam \
 	gettimeofday getusershell getutent initgroups lchown lckpwdf lstat \
-	memcpy memset setgroups sigaction strchr updwtmp updwtmpx)
+	memcpy memset setgroups sigaction strchr updwtmp updwtmpx innetgr)
 AC_SYS_LARGEFILE
 
 dnl Checks for typedefs, structures, and compiler characteristics.

src/login_nopam.c

@@ -37,7 +37,9 @@
 #include <stdio.h>
 #include <syslog.h>
 #include <ctype.h>
+#ifdef HAVE_NETDB_H
 #include <netdb.h>
+#endif
 #include <grp.h>
 #ifdef PRIMARY_GROUP_MATCH
 #include <pwd.h>
@@ -49,8 +51,6 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>		/* for inet_ntoa() */
-extern struct group *getgrnam ();
-extern int innetgr ();
 
 #if !defined(MAXHOSTNAMELEN) || (MAXHOSTNAMELEN < 64)
 #undef MAXHOSTNAMELEN
@@ -178,6 +178,7 @@ static char *myhostname (void)
 	return (name);
 }
 
+#if HAVE_INNETGR
 /* netgroup_match - match group against machine or user */
 static int
 netgroup_match (const char *group, const char *machine, const char *user)
@@ -193,6 +194,7 @@ netgroup_match (const char *group, const char *machine, const char *user)
 
 	return innetgr (group, machine, user, mydomain);
 }
+#endif
 
 /* user_match - match a username against one token */
 static int user_match (const char *tok, const char *string)
@@ -214,8 +216,10 @@ static int user_match (const char *tok, const char *string)
 		*at = 0;
 		return (user_match (tok, string)
 			&& from_match (at + 1, myhostname ()));
+#if HAVE_INNETGR
 	} else if (tok[0] == '@') {	/* netgroup */
 		return (netgroup_match (tok + 1, (char *) 0, string));
+#endif
 	} else if (string_match (tok, string)) {	/* ALL or exact match */
 		return (YES);
 	} else if ((group = getgrnam (tok))) {	/* try group membership */
@@ -271,9 +275,12 @@ static int from_match (const char *tok, const char *string)
 	 * contain a "." character. If the token is a network number, return YES
 	 * if it matches the head of the string.
 	 */
+#if HAVE_INNETGR
 	if (tok[0] == '@') {	/* netgroup */
 		return (netgroup_match (tok + 1, string, (char *) 0));
-	} else if (string_match (tok, string)) {	/* ALL or exact match */
+	} else
+#endif
+	if (string_match (tok, string)) {	/* ALL or exact match */
 		return (YES);
 	} else if (tok[0] == '.') {	/* domain: match last fields */
 		if ((str_len = strlen (string)) > (tok_len = strlen (tok))