[src/trunk]: src/tests/lib/libc/sys Add few basic checks.

[jruoho <jruoho%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b5dd92fd9226
branches:  trunk
changeset: 770516:b5dd92fd9226
user:      jruoho <jruoho%NetBSD.org@localhost>
date:      Wed Oct 19 16:19:30 2011 +0000

description:
Add few basic checks.

diffstat:

 tests/lib/libc/sys/t_write.c |  160 ++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 158 insertions(+), 2 deletions(-)

diffs (191 lines):

diff -r 4c1d79372cd0 -r b5dd92fd9226 tests/lib/libc/sys/t_write.c
--- a/tests/lib/libc/sys/t_write.c      Wed Oct 19 15:27:16 2011 +0000
+++ b/tests/lib/libc/sys/t_write.c      Wed Oct 19 16:19:30 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_write.c,v 1.1 2011/10/15 06:50:52 jruoho Exp $ */
+/* $NetBSD: t_write.c,v 1.2 2011/10/19 16:19:30 jruoho Exp $ */
 
 /*-
  * Copyright (c) 2001, 2008 The NetBSD Foundation, Inc.
@@ -29,17 +29,168 @@
 #include <sys/cdefs.h>
 __COPYRIGHT("@(#) Copyright (c) 2008\
  The NetBSD Foundation, inc. All rights reserved.");
-__RCSID("$NetBSD: t_write.c,v 1.1 2011/10/15 06:50:52 jruoho Exp $");
+__RCSID("$NetBSD: t_write.c,v 1.2 2011/10/19 16:19:30 jruoho Exp $");
 
 #include <sys/uio.h>
 #include <sys/syslimits.h>
 
 #include <atf-c.h>
 #include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
 #include <stdio.h>
+#include <stdint.h>
 #include <string.h>
 #include <unistd.h>
 
+static void             sighandler(int);
+
+static bool             fail = false;
+static const char      *path = "write";
+
+static void
+sighandler(int signo)
+{
+       fail = false;
+}
+
+ATF_TC_WITH_CLEANUP(write_err);
+ATF_TC_HEAD(write_err, tc)
+{
+       atf_tc_set_md_var(tc, "descr", "Checks errors from write(2)");
+}
+
+ATF_TC_BODY(write_err, tc)
+{
+       char rbuf[3] = { 'a', 'b', 'c' };
+       char wbuf[3] = { 'x', 'y', 'z' };
+       int fd;
+
+       errno = 0;
+       ATF_REQUIRE_ERRNO(EBADF, write(-1, wbuf, sizeof(wbuf)) == -1);
+
+       fd = open(path, O_RDWR | O_CREAT);
+
+       if (fd >= 0) {
+
+               errno = 0;
+               ATF_REQUIRE_ERRNO(0, write(fd, wbuf, 3) == 3);
+
+               errno = 0;
+               ATF_REQUIRE_ERRNO(EINVAL, write(fd, wbuf, SIZE_MAX) == -1);
+
+               errno = 0;
+               ATF_REQUIRE_ERRNO(EFAULT, write(fd, (void *)-1, 1) == -1);
+
+               /*
+                * Check that the above bogus write(2)
+                * calls did not corrupt the file.
+                */
+               ATF_REQUIRE(lseek(fd, 0, SEEK_SET) == 0);
+               ATF_REQUIRE(read(fd, rbuf, 3) == 3);
+               ATF_REQUIRE(memcmp(rbuf, wbuf, 3) == 0);
+
+               (void)close(fd);
+               (void)unlink(path);
+       }
+}
+
+ATF_TC_CLEANUP(write_err, tc)
+{
+       (void)unlink(path);
+}
+
+ATF_TC(write_pipe);
+ATF_TC_HEAD(write_pipe, tc)
+{
+       atf_tc_set_md_var(tc, "descr", "Checks for EPIPE from write(2)");
+}
+
+ATF_TC_BODY(write_pipe, tc)
+{
+       int fds[2];
+
+       ATF_REQUIRE(pipe(fds) == 0);
+       ATF_REQUIRE(signal(SIGPIPE, sighandler) == 0);
+
+       ATF_REQUIRE(write(fds[1], "x", 1) != -1);
+       ATF_REQUIRE(close(fds[0]) == 0);
+
+       errno = 0;
+       fail = true;
+
+       if (write(fds[1], "x", 1) != -1 || errno != EPIPE)
+               atf_tc_fail_nonfatal("expected EPIPE but write(2) succeeded");
+
+       ATF_REQUIRE(close(fds[1]) == 0);
+
+       if (fail != false)
+               atf_tc_fail_nonfatal("SIGPIPE was not raised");
+}
+
+ATF_TC_WITH_CLEANUP(write_pos);
+ATF_TC_HEAD(write_pos, tc)
+{
+       atf_tc_set_md_var(tc, "descr", "Checks that write(2) "
+           "updates the file position");
+}
+
+ATF_TC_BODY(write_pos, tc)
+{
+       const size_t n = 123;
+       size_t i;
+       int fd;
+
+       fd = open(path, O_RDWR | O_CREAT);
+       ATF_REQUIRE(fd >= 0);
+
+       for (i = 0; i < n; i++) {
+               ATF_REQUIRE(write(fd, "x", 1) == 1);
+               ATF_REQUIRE(lseek(fd, 0, SEEK_CUR) == (off_t)(i + 1));
+       }
+
+       ATF_REQUIRE(close(fd) == 0);
+       ATF_REQUIRE(unlink(path) == 0);
+}
+
+ATF_TC_CLEANUP(write_pos, tc)
+{
+       (void)unlink(path);
+}
+
+ATF_TC_WITH_CLEANUP(write_ret);
+ATF_TC_HEAD(write_ret, tc)
+{
+       atf_tc_set_md_var(tc, "descr", "Checks return values from write(2)");
+}
+
+ATF_TC_BODY(write_ret, tc)
+{
+       const size_t n = 99;
+       char buf[123];
+       size_t i, j;
+       int fd;
+
+       fd = open(path, O_WRONLY | O_CREAT);
+       ATF_REQUIRE(fd >= 0);
+
+       (void)memset(buf, 'x', sizeof(buf));
+
+       for (i = j = 0; i < n; i++)
+               j += write(fd, buf, sizeof(buf));
+
+       if (j != n * 123)
+               atf_tc_fail("inconsistent return values from write(2)");
+
+       (void)close(fd);
+       (void)unlink(path);
+}
+
+ATF_TC_CLEANUP(write_ret, tc)
+{
+       (void)unlink(path);
+}
+
 ATF_TC(writev_iovmax);
 ATF_TC_HEAD(writev_iovmax, tc)
 {
@@ -64,6 +215,11 @@
 
 ATF_TP_ADD_TCS(tp)
 {
+
+       ATF_TP_ADD_TC(tp, write_err);
+       ATF_TP_ADD_TC(tp, write_pipe);
+       ATF_TP_ADD_TC(tp, write_pos);
+       ATF_TP_ADD_TC(tp, write_ret);
        ATF_TP_ADD_TC(tp, writev_iovmax);
 
        return atf_no_error();