Module Name: src
Committed By: jruoho
Date: Wed Oct 19 16:19:30 UTC 2011
Modified Files:
src/tests/lib/libc/sys: t_write.c
Log Message:
Add few basic checks.
To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/tests/lib/libc/sys/t_write.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/tests/lib/libc/sys/t_write.c
diff -u src/tests/lib/libc/sys/t_write.c:1.1 src/tests/lib/libc/sys/t_write.c:1.2
--- src/tests/lib/libc/sys/t_write.c:1.1 Sat Oct 15 06:50:52 2011
+++ src/tests/lib/libc/sys/t_write.c Wed Oct 19 16:19:30 2011
@@ -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_TC_BODY(writev_iovmax, tc)
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();
