Added regress testing of libposix rename features, as per PR 5858

by Arne H. Juul <arnej@math.ntnu.no>, using the patch provided.

regress/lib/Makefile

@@ -1,5 +1,5 @@
-#	$NetBSD: Makefile,v 1.4 1997/10/11 22:57:55 mycroft Exp $
+#	$NetBSD: Makefile,v 1.5 1999/02/21 00:20:10 mjl Exp $
 
-SUBDIR+= libc
+SUBDIR+= libc libposix
 
 .include <bsd.subdir.mk>

regress/lib/libposix/Makefile

@@ -0,0 +1,5 @@
+#	$NetBSD: Makefile,v 1.1 1999/02/21 00:20:11 mjl Exp $
+
+SUBDIR=	prn1 prn2 nrn
+
+.include <bsd.subdir.mk>

regress/lib/libposix/Makefile.inc

@@ -0,0 +1,4 @@
+#	$NetBSD: Makefile.inc,v 1.1 1999/02/21 00:20:11 mjl Exp $
+#
+# do not install regression test programs
+proginstall::

regress/lib/libposix/nrn/Makefile

@@ -0,0 +1,15 @@
+#	$NetBSD: Makefile,v 1.1 1999/02/21 00:20:11 mjl Exp $
+
+PROG=   prn
+NOMAN=  t
+CLEANFILES+= t1 t2
+
+.PATH:  ${.CURDIR}/..
+
+CPPFLAGS+= -DBSD_RENAME
+
+regress:
+	@echo Testing BSD rename
+	./prn
+
+.include <bsd.prog.mk>

regress/lib/libposix/prn.c

@@ -0,0 +1,71 @@
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+int main(void)
+{
+	int errors = 0;
+	struct stat sb;
+
+	(void)unlink("t1");
+	(void)unlink("t2");
+	if (creat("t1", 0600) < 0) {
+		perror("create t1");
+		exit(1);
+	}
+
+	if (link("t1", "t2")) {
+		perror("link t1 t2");
+		exit(1);
+	}
+
+	/* Check if rename to same name works as expected */
+	if (rename("t1", "t1")) {
+		perror("rename t1 t1");
+		errors++;
+	}
+	if (stat("t1", &sb)) {
+		perror("rename removed file? stat t1");
+		exit(1);
+	}
+
+	if (rename("t1", "t2")) {
+		perror("rename t1 t2");
+		errors++;
+	}
+#if BSD_RENAME
+	/* check if rename of hardlinked file works the BSD way */
+	if (stat("t1", &sb)) {
+		if (errno != ENOENT) {
+			perror("BSD rename should remove file! stat t1");
+			errors++;
+		}
+	} else {
+		fprintf(stderr, "BSD rename should remove file!");
+		errors++;
+	}
+#else
+	/* check if rename of hardlinked file works as the standard says */
+	if (stat("t1", &sb)) {
+		perror("Posix rename should not remove file! stat t1");
+		errors++;
+	}
+#endif
+
+	/* check if we get the expected error */
+	/* this also exercises icky shared libraries goo */
+	if (rename("no/such/file/or/dir", "no/such/file/or/dir")) {
+		if (errno != ENOENT) {
+			perror("rename no/such/file/or/dir");
+			errors++;
+		}
+	} else {
+		fprintf(stderr, "No error renaming no/such/file/or/dir\n");
+		errors++;
+	}
+	
+	exit(errors ? 1 : 0);
+}

regress/lib/libposix/prn1/Makefile

@@ -0,0 +1,16 @@
+#	$NetBSD: Makefile,v 1.1 1999/02/21 00:20:11 mjl Exp $
+
+PROG=   prn
+NOMAN=  t
+CLEANFILES+= t1 t2
+
+.PATH:  ${.CURDIR}/..
+
+DPADD+=	${LIBPOSIX}
+LDADD+=	-lposix
+
+regress:
+	@echo Testing posix rename with -lposix
+	./prn
+
+.include <bsd.prog.mk>

regress/lib/libposix/prn2/Makefile

@@ -0,0 +1,15 @@
+#	$NetBSD: Makefile,v 1.1 1999/02/21 00:20:11 mjl Exp $
+
+PROG=   prn
+NOMAN=  t
+CLEANFILES+= t1 t2
+
+.PATH:  ${.CURDIR}/..
+
+CPPFLAGS+= -D_POSIX_SOURCE
+
+regress:
+	@echo Testing posix rename with -D_POSIX_SOURCE
+	./prn
+
+.include <bsd.prog.mk>