From a3f537f4d5b9db236ec67881c8b4fe4edbb80502 Mon Sep 17 00:00:00 2001
From: Shuduo Sang <sangshuduo@gmail.com>
Date: Sat, 30 Jan 2021 18:34:39 +0800
Subject: [PATCH] [TD-2891] <feature>: get process cmdline by pid on mac.

---
 src/os/src/darwin/darwinSysInfo.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/os/src/darwin/darwinSysInfo.c b/src/os/src/darwin/darwinSysInfo.c
index 0eb784e9f0..5b42b6b0f6 100644
--- a/src/os/src/darwin/darwinSysInfo.c
+++ b/src/os/src/darwin/darwinSysInfo.c
@@ -18,6 +18,9 @@
 #include "tconfig.h"
 #include "tglobal.h"
 #include "tulog.h"
+#include <errno.h>
+#include <libproc.h>
+
 
 static void taosGetSystemTimezone() {
   // get and set default timezone
@@ -103,8 +106,18 @@ int taosSystem(const char *cmd) {
 
 void taosSetCoreDump() {}
 
+char cmdline[1024];
+
 char *taosGetCmdlineByPID(int pid) {
-  return "[not supported yet]";
+
+  errno = 0;
+
+  if (proc_pidpath(pid, cmdline, sizeof(cmdline)) <= 0) {
+    fprintf(stderr, "PID is %d, %s", pid, strerror(errno));
+    return strerror(errno);
+  }
+
+  return cmdline;
 }
 
 bool taosGetSystemUid(char *uid) {
-- 
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