1 files changed, 61 insertions, 0 deletions
diff --git a/test/misc/tst-syscall6.c b/test/misc/tst-syscall6.c
new file mode 100644
index 0000000..dad67d1
--- /dev/null
+++ b/test/misc/tst-syscall6.c
@@ -0,0 +1,61 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <sys/uio.h>
+#include <sys/types.h>
+#include <linux/fs.h> /* for RWF_HIPRI */
+
+int main()
+{
+	char tmp[] = "/tmp/tst-preadv2-XXXXXX";
+	int fd;
+	struct iovec iov[2];
+	char *str0 = "hello ";
+	char *str1 = "world\n";
+	char input[16];
+	int nio;
+
+	fd = mkstemp (tmp);
+	if (fd == -1) {
+		puts ("mkstemp failed");
+		return 1;
+	}
+
+	iov[0].iov_base = str0;
+	iov[0].iov_len = strlen(str0);
+	iov[1].iov_base = str1;
+	iov[1].iov_len = strlen(str1) + 1; /* null terminator */
+
+	nio = syscall(SYS_pwritev2, fd, iov, 2, 0, 0, RWF_DSYNC);
+
+	if (nio <= 0) {
+		puts ("failed to write to fd");
+		return 1;
+	}
+
+	/* Read in the second string into the first buffer */
+	iov[0].iov_base = input;
+	iov[0].iov_len = strlen(str1) + 1; /* null terminator */
+	nio = syscall(SYS_preadv2, fd, iov, 1, strlen(str0), 0, RWF_HIPRI);
+	if (nio <= 0) {
+		printf ("failed to read fd %d\n", nio);
+		return 1;
+	}
+
+	if (strncmp(iov[0].iov_base, iov[1].iov_base, strlen(str1)) == 0)
+		printf ("syscall(SYS_preadv2) read %s", (char *) iov[0].iov_base);
+
+	if (close(fd) != 0) {
+		puts ("failed to close read fd");
+		return 1;
+	}
+
+	if (unlink(tmp) != 0) {
+		puts ("failed to unlink file");
+		return 1;
+	}
+
+	return 0;
+}