--- Libc/Libc-1353.100.2/stdio/FreeBSD/makebuf.c
+++ Libc/Libc-583/stdio/FreeBSD/makebuf.c
@@ -1,6 +1,4 @@
 /*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
@@ -15,7 +13,11 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
@@ -36,7 +38,7 @@
 static char sccsid[] = "@(#)makebuf.c	8.1 (Berkeley) 6/4/93";
 #endif /* LIBC_SCCS and not lint */
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
+__FBSDID("$FreeBSD: src/lib/libc/stdio/makebuf.c,v 1.4 2002/03/22 21:53:04 obrien Exp $");
 
 #include "namespace.h"
 #include <sys/types.h>
@@ -44,119 +46,8 @@
 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include "local.h"
 #include "un-namespace.h"
-
-#include "libc_private.h"
-#include "local.h"
-#include <xlocale/_stdio.h>
-#include <xlocale/_stdlib.h>
-#include <os/once_private.h>
-
-#ifdef FEATURE_SMALL_STDIOBUF
-# define MAXBUFSIZE	(1 << 12)
-#else
-# define MAXBUFSIZE	(1 << 16)
-#endif
-
-#define TTYBUFSIZE	4096
-#define MAXEVPSIZE 16
-
-static char __fallback_evp[MAXEVPSIZE];
-static char __stdout_evp[MAXEVPSIZE];
-
-static void
-__loadevp(const char* key, char destination[MAXEVPSIZE])
-{
-	char* evp = getenv(key);
-	if (evp != NULL) {
-		strlcpy(destination, evp, MAXEVPSIZE);
-	} else {
-		destination[0] = '\0';
-	}
-}
-
-static void
-__evpinit(void* __unused unused)
-{
-	__loadevp("STDBUF", __fallback_evp);
-	__loadevp("STDBUF1", __stdout_evp);
-}
-
-static char*
-__getevp(int fd)
-{
-	static os_once_t predicate;
-	os_once(&predicate, NULL, __evpinit);
-
-	if (fd == STDOUT_FILENO && __stdout_evp[0] != '\0') {
-		return __stdout_evp;
-	} else if (__fallback_evp[0] != '\0') {
-		return __fallback_evp;
-	} else {
-		return NULL;
-	}
-
-}
-
-/*
- * Internal routine to determine environment override buffering for a file.
- *
- * Sections of the below taken from NetBSD's version of this file under the same license.
- */
-static int
-__senvbuf(FILE *fp, size_t *bufsize, int *couldbetty)
-{
-	char* evp;
-	char* end;
-	int flags;
-	long size;
-
-	flags = 0; // Default to fully buffered
-
-	if ((evp = __getevp(fp->_file)) == NULL) {
-		return flags;
-	}
-
-	// Look at the first character only to determine buffering mode
-	switch (*evp) {
-		case 'u':
-		case 'U':
-			flags |= __SNBF;
-			break;
-		case 'l':
-		case 'L':
-			flags |= __SLBF;
-			break;
-		case 'f':
-		case 'F':
-			// Default flags is fully buffered
-			break;
-		default:
-			// Unexpected buffering mode, use default fully buffered
-			return flags;
-	}
-	// User specified envrionment defaults have higher priority than tty defaults
-	*couldbetty = 0;
-
-	// Advance the envrionment variable pointer, so we can attempt to parse the number
-	evp++;
-	if (!isdigit(*evp)) {
-		return flags; // No number found, this protects us from negative size values
-	}
-
-	size = strtol_l(evp, &end, 10, LC_C_LOCALE);
-	if (*end != '\0') {
-		return flags;
-	}
-
-	if (size <= 0) {
-		return __SNBF; // Override with unbuffered if the buffer size is 0
-	}
-
-	// We had a non zero buffer, cap it and return the flags;
-	*bufsize = size > MAXBUFSIZE ? MAXBUFSIZE : size;
-	return flags;
-}
 
 /*
  * Allocate a file buffer, or switch to unbuffered I/O.
@@ -166,7 +57,8 @@
  * optimisation) right after the _fstat() that finds the buffer size.
  */
 void
-__smakebuf(FILE *fp)
+__smakebuf(fp)
+	FILE *fp;
 {
 	void *p;
 	int flags;
@@ -179,23 +71,6 @@
 		return;
 	}
 	flags = __swhatbuf(fp, &size, &couldbetty);
-	if (fp->_file >= 0) {
-		flags |= __senvbuf(fp, &size, &couldbetty);
-
-		if (flags & __SNBF) {
-			fp->_flags |= __SNBF;
-			fp->_bf._base = fp->_p = fp->_nbuf;
-			fp->_bf._size = 1;
-			return;
-		}
-	}
-
-	if (couldbetty && isatty(fp->_file)) {
-		flags |= __SLBF;
-		/* st_blksize for ttys is 128K, so make it more reasonable */
-		if (size > TTYBUFSIZE)
-			fp->_blksize = size = TTYBUFSIZE;
-	}
 	if ((p = malloc(size)) == NULL) {
 		fp->_flags |= __SNBF;
 		fp->_bf._base = fp->_p = fp->_nbuf;
@@ -206,6 +81,8 @@
 	flags |= __SMBF;
 	fp->_bf._base = fp->_p = p;
 	fp->_bf._size = size;
+	if (couldbetty && isatty(fp->_file))
+		flags |= __SLBF;
 	fp->_flags |= flags;
 }
 
@@ -213,7 +90,10 @@
  * Internal routine to determine `proper' buffering for a file.
  */
 int
-__swhatbuf(FILE *fp, size_t *bufsize, int *couldbetty)
+__swhatbuf(fp, bufsize, couldbetty)
+	FILE *fp;
+	size_t *bufsize;
+	int *couldbetty;
 {
 	struct stat st;
 
@@ -235,7 +115,8 @@
 	 * __sseek is mainly paranoia.)  It is safe to set _blksize
 	 * unconditionally; it will only be used if __SOPT is also set.
 	 */
-	fp->_blksize = *bufsize = st.st_blksize > MAXBUFSIZE ? MAXBUFSIZE : st.st_blksize;
+	*bufsize = st.st_blksize;
+	fp->_blksize = st.st_blksize;
 	return ((st.st_mode & S_IFMT) == S_IFREG && fp->_seek == __sseek ?
 	    __SOPT : __SNPT);
 }