test pwrite

2 files changed, 56 insertions, 0 deletions

diff --git a/regress/sys/kern/pwrite/Makefile b/regress/sys/kern/pwrite/Makefile
new file mode 100644
index 00000000000..5ef6587bbcf
--- /dev/null
+++ b/regress/sys/kern/pwrite/Makefile
@@ -0,0 +1,5 @@
+#	$OpenBSD: Makefile,v 1.1 2002/02/08 20:58:02 art Exp $
+
+PROG=	pwrite
+
+.include <bsd.regress.mk>
diff --git a/regress/sys/kern/pwrite/pwrite.c b/regress/sys/kern/pwrite/pwrite.c
new file mode 100644
index 00000000000..6ee95443a0e
--- /dev/null
+++ b/regress/sys/kern/pwrite/pwrite.c
@@ -0,0 +1,51 @@
+/*	$OpenBSD: pwrite.c,v 1.1 2002/02/08 20:58:02 art Exp $	*/
+/*
+ *	Written by Artur Grabowski <art@openbsd.org> 2002 Public Domain.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <err.h>
+#include <fcntl.h>
+
+int
+main()
+{	
+	char temp[] = "/tmp/pwriteXXXXXXXXX";
+	const char magic[10] = "0123456789";
+	const char zeroes[10] = "0000000000";
+	char buf[10];
+	char c;
+	int fd;
+
+	if ((fd = mkstemp(temp)) < 0)
+		err(1, "mkstemp");
+	remove(temp);
+
+	if (write(fd, zeroes, sizeof(zeroes)) != sizeof(zeroes))
+		err(1, "write");
+
+	if (lseek(fd, 5, SEEK_SET) != 5)
+		err(1, "lseek");
+
+	if (pwrite(fd, &magic[1], 4, 4) != 4)
+		err(1, "pwrite");
+
+	if (read(fd, &c, 1) != 1)
+		err(1, "read");
+
+	if (c != '2')
+		errx(1, "read %c != %c", c, '2');
+
+	c = '5';
+	if (write(fd, &c, 1) != 1)
+		err(1, "write");
+
+	if (pread(fd, buf, 10, 0) != 10)
+		err(1, "pread");
+
+	if (memcmp(buf, "0000125400", 10) != 0)
+		errx(1, "data mismatch: %s != %s", buf, "0000125400");
+
+	return 0;
+}