Map EEXIST to PathAlreadyExists error, closes #20226

3 files changed, 17 insertions, 0 deletions

diff --git a/src/libstd/io/fs.rs b/src/libstd/io/fs.rs
index 4e736908c37..10578fbb3ff 100644
--- a/src/libstd/io/fs.rs
+++ b/src/libstd/io/fs.rs
@@ -1149,6 +1149,19 @@ mod test {
     }
 
     #[test]
+    fn mkdir_path_already_exists_error() {
+        use io::{IoError, PathAlreadyExists};
+
+        let tmpdir = tmpdir();
+        let dir = &tmpdir.join("mkdir_error_twice");
+        check!(mkdir(dir, io::USER_RWX));
+        match mkdir(dir, io::USER_RWX) {
+            Err(IoError{kind:PathAlreadyExists,..}) => (),
+            _ => assert!(false)
+        };
+    }
+
+    #[test]
     fn recursive_mkdir() {
         let tmpdir = tmpdir();
         let dir = tmpdir.join("d1/d2");
diff --git a/src/libstd/sys/unix/mod.rs b/src/libstd/sys/unix/mod.rs
index f3babca3287..4b7ac8ff4d3 100644
--- a/src/libstd/sys/unix/mod.rs
+++ b/src/libstd/sys/unix/mod.rs
@@ -109,6 +109,8 @@ pub fn decode_error(errno: i32) -> IoError {
              "file descriptor is not a TTY"),
         libc::ETIMEDOUT => (io::TimedOut, "operation timed out"),
         libc::ECANCELED => (io::TimedOut, "operation aborted"),
+        libc::consts::os::posix88::EEXIST =>
+            (io::PathAlreadyExists, "path already exists"),
 
         // These two constants can have the same value on some systems,
         // but different values on others, so we can't use a match
diff --git a/src/libstd/sys/windows/mod.rs b/src/libstd/sys/windows/mod.rs
index 6924687d8c4..aee98e22836 100644
--- a/src/libstd/sys/windows/mod.rs
+++ b/src/libstd/sys/windows/mod.rs
@@ -121,6 +121,8 @@ pub fn decode_error(errno: i32) -> IoError {
              "invalid handle provided to function"),
         libc::ERROR_NOTHING_TO_TERMINATE =>
             (io::InvalidInput, "no process to kill"),
+        libc::ERROR_ALREADY_EXISTS =>
+            (io::PathAlreadyExists, "path already exists"),
 
         // libuv maps this error code to EISDIR. we do too. if it is found
         // to be incorrect, we can add in some more machinery to only