From 73b40546d59c6bebd782aeaa15a6bdc8109485bd Mon Sep 17 00:00:00 2001
From: ptrcnull <git@ptrcnull.me>
Date: Wed, 13 Jul 2022 04:58:08 +0200
Subject: uio: add pwritev64v2 and preadv64v2

---
 libgcompat/uio.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 libgcompat/uio.c

(limited to 'libgcompat')

diff --git a/libgcompat/uio.c b/libgcompat/uio.c
new file mode 100644
index 0000000..797cb3a
--- /dev/null
+++ b/libgcompat/uio.c
@@ -0,0 +1,32 @@
+#include <sys/syscall.h>
+#include <sys/uio.h>		/* iovec, pwritev, preadv */
+#include <errno.h>		/* errno */
+#include <unistd.h>		/* syscall */
+
+ssize_t pwritev64v2(int fd, const struct iovec *iov, int count, off_t ofs, int flags)
+{
+	if (flags != 0) {
+		errno = ENOTSUP;
+		return -1;
+	}
+
+	if (ofs == -1) {
+		return writev(fd, iov, count);
+	}
+
+	return syscall(__NR_pwritev2, fd, iov, count, ofs);
+}
+
+ssize_t preadv64v2(int fd, const struct iovec *iov, int count, off_t ofs, int flags)
+{
+	if (flags != 0) {
+		errno = ENOTSUP;
+		return -1;
+	}
+
+	if (ofs == -1) {
+		return readv(fd, iov, count);
+	}
+
+	return syscall(__NR_preadv2, fd, iov, count, ofs);
+}
-- 
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