ash: drop workaround for 'read -t 0'

Commit 0eda390d6 (ash: improve handling of 'read -t 0') added code
to work around the limitations of our poll(2) implementation.

Now that poll(2) has been improved the workaround is unnecessary.

Saves 64 bytes.

1 files changed, 0 insertions, 12 deletions

diff --git a/shell/shell_common.c b/shell/shell_common.c
index eb2c4fbf5..9d74dcb7a 100644
--- a/shell/shell_common.c
+++ b/shell/shell_common.c
@@ -129,18 +129,6 @@ shell_builtin_read(struct builtin_read_params *params)
                  * bash seems to ignore -p PROMPT for this use case.
                  */
                 int r;
-#if ENABLE_PLATFORM_MINGW32
-                HANDLE handle = (HANDLE)_get_osfhandle(fd);
-                DWORD filetype = FILE_TYPE_UNKNOWN;
-
-                if (handle != INVALID_HANDLE_VALUE)
-                        filetype = GetFileType(handle);
-                /* poll uses WaitForSingleObject which can't handle disk files */
-                if (filetype == FILE_TYPE_DISK || filetype == FILE_TYPE_UNKNOWN)
-                        return (const char *)(uintptr_t)(0);
-                if (isatty(fd))
-                        return (const char *)(uintptr_t)(1);
-#endif
                 pfd[0].events = POLLIN;
                 r = poll(pfd, 1, /*timeout:*/ 0);
                 /* Return 0 only if poll returns 1 ("one fd ready"), else return 1: */