uio: add pwritev64v2 and preadv64v2

2 files changed, 33 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 426513f..641249b 100644
--- a/Makefile
+++ b/Makefile
@@ -34,6 +34,7 @@ LIBGCOMPAT_SRC = \
 	libgcompat/syslog.c		\
 	libgcompat/time.c		\
 	libgcompat/ucontext.c		\
+	libgcompat/uio.c		\
 	libgcompat/unistd.c		\
 	libgcompat/utmp.c		\
 	libgcompat/version.c		\
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);
+}