From 43271e97abb9b70be32aabe5acaa6f087ebb079f Mon Sep 17 00:00:00 2001
From: usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 26 Nov 2001 07:59:01 +0000
Subject: 	* win32/win32.c (mypopen): fixed that mypclose() didn't really
 close 	  pipe.

	* win32/win32.c (CreateChild): set STARTF_USESTDHANDLES flag only
	  when some handles are passed.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1859 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog     |   8 +++++
 win32/win32.c | 100 +++++++++++++++++++++++++++++++++++++++++++---------------
 2 files changed, 82 insertions(+), 26 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 89aeb3245a..bb448c42c6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Mon Nov 26 16:54:59 2001  Usaku Nakamura <usa@ruby-lang.org>
+
+	* win32/win32.c (mypopen): fixed that mypclose() didn't really close
+	  pipe.
+
+	* win32/win32.c (CreateChild): set STARTF_USESTDHANDLES flag only
+	  when some handles are passed.
+
 Sun Nov 25 21:02:18 2001  Usaku Nakamura  <usa@ruby-lang.org>
 
 	* parse.y (str_extend): change types of second and third arguments
diff --git a/win32/win32.c b/win32/win32.c
index 919688233a..5ba9bfbaf7 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -444,7 +444,8 @@ mypopen (char *cmd, char *mode)
     int pipemode;
     struct ChildRecord* child;
     BOOL fRet;
-    HANDLE hInFile, hOutFile;
+    HANDLE hInFile, hOutFile, hSavedStdIo, hDupFile;
+    HANDLE hCurProc;
     SECURITY_ATTRIBUTES sa;
     int fd;
 
@@ -468,30 +469,75 @@ mypopen (char *cmd, char *mode)
 	return NULL;
     }
 
+    /* save parent's STDIO and redirect for child */
+    hCurProc = GetCurrentProcess();
     if (reading) {
-	child = CreateChild(cmd, &sa, NULL, hOutFile, NULL);
+	hSavedStdIo = GetStdHandle(STD_OUTPUT_HANDLE);
+	if (!SetStdHandle(STD_OUTPUT_HANDLE, hOutFile) ||
+	    !DuplicateHandle(hCurProc, hInFile, hCurProc, &hDupFile, 0, FALSE,
+			     DUPLICATE_SAME_ACCESS)) {
+	    errno = GetLastError();
+	    CloseHandle(hInFile);
+	    CloseHandle(hOutFile);
+	    CloseHandle(hCurProc);
+	    return NULL;
+	}
+	CloseHandle(hInFile);
     }
     else {
-	child = CreateChild(cmd, &sa, hInFile, NULL, NULL);
+	hSavedStdIo = GetStdHandle(STD_INPUT_HANDLE);
+	if (!SetStdHandle(STD_INPUT_HANDLE, hInFile) ||
+	    !DuplicateHandle(hCurProc, hOutFile, hCurProc, &hDupFile, 0, FALSE,
+			     DUPLICATE_SAME_ACCESS)) {
+	    errno = GetLastError();
+	    CloseHandle(hInFile);
+	    CloseHandle(hOutFile);
+	    CloseHandle(hCurProc);
+	    return NULL;
+	}
+	CloseHandle(hOutFile);
     }
+    CloseHandle(hCurProc);
 
+    /* create child process */
+    child = CreateChild(cmd, &sa, NULL, NULL, NULL);
     if (!child) {
-	CloseHandle(hInFile);
-	CloseHandle(hOutFile);
+	CloseHandle(reading ? hOutFile : hInFile);
+	CloseHandle(hDupFile);
 	return NULL;
     }
 
+    /* restore STDIO */
+    if (reading) {
+	if (!SetStdHandle(STD_OUTPUT_HANDLE, hSavedStdIo)) {
+	    errno = GetLastError();
+	    CloseChildHandle(child);
+	    CloseHandle(hDupFile);
+	    CloseHandle(hOutFile);
+	    return NULL;
+	}
+    }
+    else {
+	if (!SetStdHandle(STD_INPUT_HANDLE, hSavedStdIo)) {
+	    errno = GetLastError();
+	    CloseChildHandle(child);
+	    CloseHandle(hInFile);
+	    CloseHandle(hDupFile);
+	    return NULL;
+	}
+    }
+
     if (reading) {
-	fd = _open_osfhandle((long)hInFile,  (_O_RDONLY | pipemode));
+	fd = _open_osfhandle((long)hDupFile, (_O_RDONLY | pipemode));
 	CloseHandle(hOutFile);
     }
     else {
-	fd = _open_osfhandle((long)hOutFile, (_O_WRONLY | pipemode));
+	fd = _open_osfhandle((long)hDupFile, (_O_WRONLY | pipemode));
 	CloseHandle(hInFile);
     }
 
     if (fd == -1) {
-	CloseHandle(reading ? hInFile : hOutFile);
+	CloseHandle(hDupFile);
 	CloseChildHandle(child);
 	return NULL;
     }
@@ -571,24 +617,26 @@ CreateChild(char *cmd, SECURITY_ATTRIBUTES *psa, HANDLE hInput, HANDLE hOutput,
     memset(&aStartupInfo, 0, sizeof (STARTUPINFO));
     memset(&aProcessInformation, 0, sizeof (PROCESS_INFORMATION));
     aStartupInfo.cb = sizeof (STARTUPINFO);
-    aStartupInfo.dwFlags = STARTF_USESTDHANDLES;
-    if (hInput) {
-	aStartupInfo.hStdInput  = hInput;
-    }
-    else {
-	aStartupInfo.hStdInput  = GetStdHandle(STD_INPUT_HANDLE);
-    }
-    if (hOutput) {
-	aStartupInfo.hStdOutput = hOutput;
-    }
-    else {
-	aStartupInfo.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
-    }
-    if (hError) {
-	aStartupInfo.hStdError = hError;
-    }
-    else {
-	aStartupInfo.hStdError = GetStdHandle(STD_ERROR_HANDLE);
+    if (hInput || hOutput || hError) {
+	aStartupInfo.dwFlags = STARTF_USESTDHANDLES;
+	if (hInput) {
+	    aStartupInfo.hStdInput  = hInput;
+	}
+	else {
+	    aStartupInfo.hStdInput  = GetStdHandle(STD_INPUT_HANDLE);
+	}
+	if (hOutput) {
+	    aStartupInfo.hStdOutput = hOutput;
+	}
+	else {
+	    aStartupInfo.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
+	}
+	if (hError) {
+	    aStartupInfo.hStdError = hError;
+	}
+	else {
+	    aStartupInfo.hStdError = GetStdHandle(STD_ERROR_HANDLE);
+	}
     }
 
     dwCreationFlags = (NORMAL_PRIORITY_CLASS);
-- 
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