return size 0 for /dev/null read

tao-guo · tao-guo · commit b3d3b0273a65 · 2021-04-11T19:17:01.000-07:00
diff --git a/src/io.rs b/src/io.rs
@@ -12,7 +12,7 @@ pub enum CmdIn {
 impl Read for CmdIn {
     fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
         match self {
-            CmdIn::CmdNull => Ok(buf.len()),
+            CmdIn::CmdNull => Ok(0),
             CmdIn::CmdFile(file) => file.read(buf),
             CmdIn::CmdPipe(pipe) => pipe.read(buf),
         }

Original file line number	Diff line number	Diff line change
`@@ -12,7 +12,7 @@ pub enum CmdIn {`
`12`	`12`	`impl Read for CmdIn {`
`13`	`13`	`fn read(&mut self, buf: &mut [u8]) -> Result<usize> {`
`14`	`14`	`match self {`
`15`		`- CmdIn::CmdNull => Ok(buf.len()),`
	`15`	`+ CmdIn::CmdNull => Ok(0),`
`16`	`16`	`CmdIn::CmdFile(file) => file.read(buf),`
`17`	`17`	`CmdIn::CmdPipe(pipe) => pipe.read(buf),`
`18`	`18`	`}`