Enable devname(3)

There is no support for a device name database yet, so this call is
expected to be fairly slow.

Change-Id: I73aa5f267e2b6921b7d3bbdcc4beac463931132c

lib/libc/gen/Makefile.inc

@@ -12,7 +12,7 @@
 # 	closefrom.c confstr.c extattr.c getdevmajor.c \
 #	pthread_atfork.c setdomainname.c sethostname.c setproctitle.c \
 #	sysctl.c sysctlbyname.c sysctlgetmibinfo.c sysctlnametomib.c \
-#	devname.c wait3.c
+#	wait3.c
 
 # To be ported
 # nlist.c nlist_aout.c nlist_coff.c nlist_ecoff.c nlist_elf32.c nlist_elf64.c
@@ -26,7 +26,7 @@
 SRCS+= 	_errno.c alarm.c alphasort.c arc4random.c assert.c basename.c clock.c \
 	closedir.c \
 	ctermid.c ctype_.c daemon.c \
-	dehumanize_number.c dirname.c err.c errx.c \
+	dehumanize_number.c devname.c dirname.c err.c errx.c \
 	errlist.c errno.c execl.c execle.c execlp.c execv.c execvp.c \
 	fmtcheck.c fmtmsg.c fnmatch.c fstab.c ftok.c \
 	fts.c ftw.c getbsize.c getcap.c getcwd.c \

lib/libc/gen/devname.c

@@ -49,6 +49,7 @@ __RCSID("$NetBSD: devname.c,v 1.22 2012/06/03 21:42:46 joerg Exp $");
 __weak_alias(devname_r,_devname_r)
 #endif
 
+#ifndef __minix
 static once_t db_opened = ONCE_INITIALIZER;
 static struct cdbr *db;
 static devmajor_t pts;
@@ -101,6 +102,7 @@ devname_ptslookup(dev_t dev, mode_t type, char *path, size_t len)
 		return ERANGE;
 	return 0;
 }
+#endif
 
 static int
 devname_fts(dev_t dev, mode_t type, char *path, size_t len)
@@ -140,6 +142,7 @@ devname_r(dev_t dev, mode_t type, char *path, size_t len)
 {
 	int rv;
 
+#ifndef __minix
 	thr_once(&db_opened, devname_dbopen);
 
 	if (db != NULL) {
@@ -154,6 +157,7 @@ devname_r(dev_t dev, mode_t type, char *path, size_t len)
 
 	if (db != NULL)
 		return ENOENT;
+#endif
 	rv = devname_fts(dev, type, path, len);
 	return rv;
 }