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windows: don't duplicate invalid stdio handles

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Ref: joyent/node#3779
This commit is contained in:
Bert Belder 2012-08-08 02:24:48 +02:00
parent 00d2f22151
commit a1157cef37
1 changed files with 14 additions and 0 deletions
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14
src/win/process-stdio.c
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@ -181,6 +181,20 @@ static int uv__create_stdio_pipe_pair(uv_loop_t* loop, uv_pipe_t* server_pipe,
static int uv__duplicate_handle(uv_loop_t* loop, HANDLE handle, HANDLE* dup) {
HANDLE current_process;
/* _get_osfhandle will sometimes return -2 in case of an error. This seems */
/* to happen when fd <= 2 and the process' corresponding stdio handle is */
/* set to NULL. Unfortunately DuplicateHandle will happily duplicate /*
/* (HANDLE) -2, so this situation goes unnoticed until someone tries to */
/* use the duplicate. Therefore we filter out known-invalid handles here. */
if (handle == INVALID_HANDLE_VALUE ||
handle == NULL ||
handle == (HANDLE) -2) {
*dup = INVALID_HANDLE_VALUE;
uv__set_artificial_error(loop, UV_EBADF);
return -1;
}
current_process = GetCurrentProcess();
if (!DuplicateHandle(current_process,