Import NetBSD system call regression tests. They were written with

ATF (Automated Testing Framework), so we use a small wrapper to map 
it to our bsd.regress.mk framework.  Only half of the 80 NetBSD
tests have been taken, the others need more work to adapt.  Of them 
34 syscall tests pass.
Moritz Buhl ported the tests to OpenBSD.

1 files changed, 234 insertions, 0 deletions

diff --git a/src/regress/lib/libc/sys/t_link.c b/src/regress/lib/libc/sys/t_link.c
new file mode 100644
index 0000000000..291fd9cda4
--- /dev/null
+++ b/src/regress/lib/libc/sys/t_link.c
@@ -0,0 +1,234 @@
+/*      $OpenBSD: t_link.c,v 1.1.1.1 2019/11/19 19:57:03 bluhm Exp $    */
+/* $NetBSD: t_link.c,v 1.3 2017/01/13 20:42:36 christos Exp $ */
+
+/*-
+ * Copyright (c) 2011 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jukka Ruohonen.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "macros.h"
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: t_link.c,v 1.3 2017/01/13 20:42:36 christos Exp $");
+
+#include <sys/param.h>
+#include <sys/stat.h>
+
+#include "atf-c.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+static const char       *getpath(void);
+static char              path[] = "link";
+static const char       *pathl;
+
+static const char *
+getpath(void)
+{
+        static char buf[LINE_MAX];
+
+        (void)memset(buf, '\0', sizeof(buf));
+
+        if (getcwd(buf, sizeof(buf)) == NULL)
+                return NULL;
+
+        (void)strlcat(buf, path, sizeof(buf));
+        (void)strlcat(buf, ".link", sizeof(buf));
+
+        return buf;
+}
+
+ATF_TC_WITH_CLEANUP(link_count);
+ATF_TC_HEAD(link_count, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "link(2) counts are incremented?");
+}
+
+ATF_TC_BODY(link_count, tc)
+{
+        struct stat sa, sb;
+        int fd;
+
+        (void)memset(&sa, 0, sizeof(struct stat));
+        (void)memset(&sb, 0, sizeof(struct stat));
+
+        pathl = getpath();
+        fd = open(path, O_RDWR | O_CREAT, 0600);
+
+        ATF_REQUIRE(fd >= 0);
+        ATF_REQUIRE(pathl != NULL);
+
+        ATF_REQUIRE(stat(path, &sa) == 0);
+        ATF_REQUIRE(link(path, pathl) == 0);
+        ATF_REQUIRE(stat(path, &sb) == 0);
+
+        if (sa.st_nlink != sb.st_nlink - 1)
+                atf_tc_fail("incorrect link(2) count");
+
+        ATF_REQUIRE(close(fd) == 0);
+        ATF_REQUIRE(unlink(path) == 0);
+        ATF_REQUIRE(unlink(pathl) == 0);
+}
+
+ATF_TC_CLEANUP(link_count, tc)
+{
+        (void)unlink(path);
+        (void)unlink(pathl);
+}
+
+ATF_TC_WITH_CLEANUP(link_err);
+ATF_TC_HEAD(link_err, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test error conditions of link(2)");
+}
+
+ATF_TC_BODY(link_err, tc)
+{
+        char buf[MAXPATHLEN + 1];
+        int fd;
+
+        (void)memset(buf, 'x', sizeof(buf));
+
+        pathl = getpath();
+        fd = open(path, O_RDWR | O_CREAT, 0600);
+
+        ATF_REQUIRE(fd >= 0);
+        ATF_REQUIRE(pathl != NULL);
+
+        errno = 0;
+        ATF_REQUIRE(link(path, pathl) == 0);
+        ATF_REQUIRE_ERRNO(EEXIST, link(path, pathl) == -1);
+
+        errno = 0;
+        ATF_REQUIRE_ERRNO(ENAMETOOLONG, link(buf, "xxx") == -1);
+
+        errno = 0;
+        ATF_REQUIRE_ERRNO(ENOENT, link(path, "/d/c/b/a") == -1);
+
+        errno = 0;
+        ATF_REQUIRE_ERRNO(ENOENT, link("/a/b/c/d", path) == -1);
+
+        errno = 0;
+        ATF_REQUIRE_ERRNO(ENOENT, link("/a/b/c/d", "/d/c/b/a") == -1);
+
+        errno = 0;
+        ATF_REQUIRE_ERRNO(EFAULT, link(path, (const char *)-1) == -1);
+
+        errno = 0;
+        ATF_REQUIRE_ERRNO(EFAULT, link((const char *)-1, "xxx") == -1);
+
+        ATF_REQUIRE(close(fd) == 0);
+        ATF_REQUIRE(unlink(path) == 0);
+        ATF_REQUIRE(unlink(pathl) == 0);
+}
+
+ATF_TC_CLEANUP(link_err, tc)
+{
+        (void)unlink(path);
+        (void)unlink(pathl);
+}
+
+ATF_TC(link_perm);
+ATF_TC_HEAD(link_perm, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test permissions with link(2)");
+        atf_tc_set_md_var(tc, "require.user", "unprivileged");
+}
+
+ATF_TC_BODY(link_perm, tc)
+{
+        int rv;
+
+        errno = 0;
+        rv = link("/root", "/root.link");
+        ATF_REQUIRE_MSG(rv == -1 && (errno == EACCES || errno == EPERM),
+            "link to a directory did not fail with EPERM or EACCESS; link() "
+            "returned %d, errno %d", rv, errno);
+
+        errno = 0;
+        ATF_REQUIRE_ERRNO(EACCES,
+            link("/root/.profile", "/root/.profile.link") == -1);
+}
+
+ATF_TC_WITH_CLEANUP(link_stat);
+ATF_TC_HEAD(link_stat, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Check stat(2) of a linked file");
+}
+
+ATF_TC_BODY(link_stat, tc)
+{
+        struct stat sa, sb;
+        int fd;
+
+        (void)memset(&sa, 0, sizeof(struct stat));
+        (void)memset(&sb, 0, sizeof(struct stat));
+
+        pathl = getpath();
+        fd = open(path, O_RDWR | O_CREAT, 0600);
+
+        ATF_REQUIRE(fd >= 0);
+        ATF_REQUIRE(pathl != NULL);
+
+        ATF_REQUIRE(link(path, pathl) == 0);
+        ATF_REQUIRE(stat(path, &sa) == 0);
+        ATF_REQUIRE(lstat(pathl, &sb) == 0);
+
+        if (sa.st_uid != sb.st_uid)
+                atf_tc_fail("unequal UIDs");
+
+        if (sa.st_mode != sb.st_mode)
+                atf_tc_fail("unequal modes");
+
+        if (sa.st_ino != sb.st_ino)
+                atf_tc_fail("unequal inodes");
+
+        ATF_REQUIRE(close(fd) == 0);
+        ATF_REQUIRE(unlink(path) == 0);
+        ATF_REQUIRE(unlink(pathl) == 0);
+}
+
+ATF_TC_CLEANUP(link_stat, tc)
+{
+        (void)unlink(path);
+        (void)unlink(pathl);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+        ATF_TP_ADD_TC(tp, link_count);
+        ATF_TP_ADD_TC(tp, link_err);
+        ATF_TP_ADD_TC(tp, link_perm);
+        ATF_TP_ADD_TC(tp, link_stat);
+
+        return atf_no_error();
+}