Add read_to_end for AnonPipe

Add `read_to_end` method for `sys::{target}::pipe::AnonPipe`. This allows
having a more optimized version of `read_to_end` for ChildStdout.

Signed-off-by: Ayush Singh <ayushsingh1325@gmail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/library/std/src/sys/unix/pipe.rs b/library/std/src/sys/unix/pipe.rs
index a56c275c942..a744d0ab640 100644
--- a/library/std/src/sys/unix/pipe.rs
+++ b/library/std/src/sys/unix/pipe.rs
@@ -58,6 +58,10 @@ impl AnonPipe {
         self.0.is_read_vectored()
     }
 
+    pub fn read_to_end(&self, buf: &mut Vec<u8>) -> io::Result<usize> {
+        self.0.read_to_end(buf)
+    }
+
     pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
         self.0.write(buf)
     }