Simple test for pread.

2 files changed, 53 insertions, 0 deletions

diff --git a/regress/sys/kern/pread/Makefile b/regress/sys/kern/pread/Makefile
new file mode 100644
index 00000000000..5979802f056
--- /dev/null
+++ b/regress/sys/kern/pread/Makefile
@@ -0,0 +1,5 @@
+#	$OpenBSD: Makefile,v 1.1 2002/02/08 19:05:18 art Exp $
+
+PROG=	pread
+
+.include <bsd.regress.mk>
diff --git a/regress/sys/kern/pread/pread.c b/regress/sys/kern/pread/pread.c
new file mode 100644
index 00000000000..23f28155d3f
--- /dev/null
+++ b/regress/sys/kern/pread/pread.c
@@ -0,0 +1,48 @@
+/*	$OpenBSD: pread.c,v 1.1 2002/02/08 19:05:18 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/dup2XXXXXXXXX";
+	const char magic[10] = "0123456789";
+	char c;
+	int fd;
+
+	if ((fd = mkstemp(temp)) < 0)
+		err(1, "mkstemp");
+	remove(temp);
+
+	if (write(fd, magic, sizeof(magic)) != sizeof(magic))
+		err(1, "write");
+
+	if (lseek(fd, 0, SEEK_SET) != 0)
+		err(1, "lseek");
+
+	if (read(fd, &c, 1) != 1)
+		err(1, "read1");
+
+	if (c != magic[0])
+		errx(1, "read1 %c != %c", c, magic[0]);
+
+	if (pread(fd, &c, 1, 7) != 1)
+		err(1, "pread");
+
+	if (c != magic[7])
+		errx(1, "pread %c != %c", c, magic[7]);
+
+	if (read(fd, &c, 1) != 1)
+		err(1, "read2");
+
+	if (c != magic[1])
+		errx(1, "read2 %c != %c", c, magic[1]);
+
+	return 0;
+}