greenplumn execute_pipe 代码
文件路径：/src/include/storage/execute_pipe.h
/*-------------------------------------------------------------------------
*
* execute_pipe.c
* popen() replacement with stderr
*
* Portions Copyright (C) 2020-Present VMware, Inc.
*
*
* IDENTIFICATION
* src/include/storage/execute_pipe.h
*
*-------------------------------------------------------------------------
*/
#include "lib/stringinfo.h"
extern int popen_with_stderr(int *rwepipe, const char *exe, bool forwrite);
extern int pclose_with_stderr(int pid, int *rwepipe, StringInfo sinfo);