add copy_file_range system call wrapper

diff --git a/include/unistd.h b/include/unistd.h
index 9485da7..b9b23a1 100644 (file)
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -188,6 +188,7 @@ char *get_current_dir_name(void);
 int syncfs(int);
 int euidaccess(const char *, int);
 int eaccess(const char *, int);
+ssize_t copy_file_range(int, off_t *, int, off_t *, size_t, unsigned);
 #endif
 
 #if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)

diff --git a/src/linux/copy_file_range.c b/src/linux/copy_file_range.c
new file mode 100644 (file)
index 0000000..dd4b133
--- /dev/null
+++ b/src/linux/copy_file_range.c
@@ -0,0 +1,8 @@
+#define _GNU_SOURCE
+#include <unistd.h>
+#include "syscall.h"
+
+ssize_t copy_file_range(int fd_in, off_t *off_in, int fd_out, off_t *off_out, size_t len, unsigned flags)
+{
+       return syscall(SYS_copy_file_range, fd_in, off_in, fd_out, off_out, len, flags);
+}