From 56a19b1439effc8a3990f97ff9241379d55a07cb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Herm=C3=A8s=20B=C3=A9lusca-Ma=C3=AFto?=
 <hermes.belusca-maito@reactos.org>
Date: Sat, 18 Nov 2017 20:50:50 +0100
Subject: [PATCH] [CMD] ExecutePipeline() returns the last error level (set to
 process exit code). CORE-13974

This should fix situations where (for example):
   command_1 | command_2 && echo Succeeded
should *NOT* run "echo Succeeded" if any of the command_1 or command_2 has
failed.

This also makes the ExecutePipeline() function on par with the other
"ExecuteXXX()" helpers.

Problem diagnosed by Doug Lyons; patch inspired by contributor 'cagey45'.
---
 base/shell/cmd/cmd.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/base/shell/cmd/cmd.c b/base/shell/cmd/cmd.c
index e6c9bec785a..549f10d59ea 100644
--- a/base/shell/cmd/cmd.c
+++ b/base/shell/cmd/cmd.c
@@ -636,7 +636,7 @@ ExecuteAsync(PARSED_COMMAND *Cmd)
     return prci.hProcess;
 }
 
-static VOID
+static INT
 ExecutePipeline(PARSED_COMMAND *Cmd)
 {
 #ifdef FEATURE_REDIRECTION
@@ -708,7 +708,7 @@ ExecutePipeline(PARSED_COMMAND *Cmd)
 
     while (--nProcesses >= 0)
         CloseHandle(hProcess[nProcesses]);
-    return;
+    return nErrorLevel;
 
 failed:
     if (hInput)
@@ -721,6 +721,8 @@ failed:
     SetStdHandle(STD_INPUT_HANDLE, hOldConIn);
     SetStdHandle(STD_OUTPUT_HANDLE, hOldConOut);
 #endif
+
+    return nErrorLevel;
 }
 
 INT
@@ -771,7 +773,7 @@ ExecuteCommand(PARSED_COMMAND *Cmd)
             Ret = ExecuteCommand(Sub->Next);
         break;
     case C_PIPE:
-        ExecutePipeline(Cmd);
+        Ret = ExecutePipeline(Cmd);
         break;
     case C_IF:
         Ret = ExecuteIf(Cmd);