Add copy_file_range(2) syscall stub to bionic.
Test: treehugger
Bug: https://buganizer.corp.google.com/issues/227784687
Change-Id: I543306cd2234189401bf7c9d80d405eeb6e4d41d
diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index 1435e79..45b2a1b 100644
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -108,6 +108,7 @@
int __close:close(int) all
int close_range(unsigned int, unsigned int, int) all
+ssize_t copy_file_range(int, off64_t*, int, off64_t*, size_t, unsigned int) all
pid_t __getpid:getpid() all
int memfd_create(const char*, unsigned) all
int munmap(void*, size_t) all
diff --git a/libc/include/unistd.h b/libc/include/unistd.h
index f142525..b5694b8 100644
--- a/libc/include/unistd.h
+++ b/libc/include/unistd.h
@@ -313,6 +313,17 @@
int getdomainname(char* __buf, size_t __buf_size) __INTRODUCED_IN(26);
int setdomainname(const char* __name, size_t __n) __INTRODUCED_IN(26);
+/**
+ * [copy_file_range(2)](https://man7.org/linux/man-pages/man2/copy_file_range.2.html) copies
+ * a range of data from one file descriptor to another.
+ *
+ * Returns the number of bytes copied on success, and returns -1 and sets errno
+ * on failure.
+ *
+ * Available since API level 34.
+ */
+ssize_t copy_file_range(int __fd_in, off64_t* __off_in, int __fd_out, off64_t* __off_out, size_t __length, unsigned int __flags) __INTRODUCED_IN(34);
+
#if __ANDROID_API__ >= 28
void swab(const void* __src, void* __dst, ssize_t __byte_count) __INTRODUCED_IN(28);
#endif
diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index e64fe00..79f331a 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -1579,6 +1579,7 @@
LIBC_U { # introduced=UpsideDownCake
global:
close_range;
+ copy_file_range;
} LIBC_T;
LIBC_PRIVATE {