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--- Libc/Libc-1725.40.4/stdio/FreeBSD/makebuf.c
+++ Libc/Libc-498/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>
@@ -44,147 +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 << 24)
-#endif
-
-#define TTYBUFSIZE 4096
-#define MAXEVPSIZE 16
-
-static char __fallback_evp[MAXEVPSIZE];
-static char __stdin_evp[MAXEVPSIZE];
-static char __stdout_evp[MAXEVPSIZE];
-static char __stderr_evp[MAXEVPSIZE];
-
-static void
-__loadevp(const char *key, char destination[MAXEVPSIZE])
-{
- char *evp = getenv(key);
- if (evp != NULL)
- strlcpy(destination, evp, MAXEVPSIZE);
-}
-
-static void
-__evpinit(void __unused *unused)
-{
- /* NetBSD style */
- __loadevp("STDBUF", __fallback_evp);
- __loadevp("STDBUF0", __stdin_evp);
- __loadevp("STDBUF1", __stdout_evp);
- __loadevp("STDBUF2", __stderr_evp);
- /* GNU / FreeBSD style */
- __loadevp("_STDBUF_I", __stdin_evp);
- __loadevp("_STDBUF_O", __stdout_evp);
- __loadevp("_STDBUF_E", __stderr_evp);
-}
-
-static char *
-__getevp(int fd)
-{
- static os_once_t predicate;
- os_once(&predicate, NULL, __evpinit);
-
- switch (fd) {
- case STDIN_FILENO:
- if (__stdin_evp[0] != '\0')
- return __stdin_evp;
- break;
- case STDOUT_FILENO:
- if (__stdout_evp[0] != '\0')
- return __stdout_evp;
- break;
- case STDERR_FILENO:
- if (__stderr_evp[0] != '\0')
- return __stderr_evp;
- break;
- }
- if (__fallback_evp[0] != '\0')
- return __fallback_evp;
- 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;
- int flags = 0; // default = fully buffered
- size_t size = 0;
-
- if ((evp = __getevp(fp->_file)) == NULL || *evp == '\0')
- return 0;
- /*
- * NetBSD style: [UuLlFf] followed by an optional size
- * GNU style: [0L] or a size
- * FreeBSD style: [0LB] or a size
- * Synthesis: optional [0UuLlFfB] followed by optional size.
- */
- switch (*evp) {
- case '0':
- case 'U':
- case 'u':
- evp++;
- flags = __SNBF;
- break;
- case 'L':
- case 'l':
- evp++;
- flags = __SLBF;
- break;
- case 'F':
- case 'f':
- case 'B':
- evp++;
- break;
- }
- if (flags == __SNBF && *evp != '\0')
- return 0;
- for (; isdigit((unsigned char)*evp); evp++)
- size = size * 10 + *evp - '0';
- /*
- * GNU accepts suffixes up to Z and has different notations for
- * binary and decimal. FreeBSD accepts suffixes up to G. We'll
- * settle for [Kk] and M and not bother with the distinction
- * between binary and decimal.
- */
- switch (*evp) {
- case 'M':
- evp++;
- size *= 1024 * 1024;
- break;
- case 'K':
- case 'k':
- evp++;
- size *= 1024;
- break;
- case 'B':
- case '\0':
- break;
- default:
- return 0;
- }
- if (*evp == 'B')
- evp++;
- if (*evp != '\0')
- return 0;
- *couldbetty = 0;
- *bufsize = size > MAXBUFSIZE ? MAXBUFSIZE : size;
- return flags;
-}
/*
* Allocate a file buffer, or switch to unbuffered I/O.
@@ -194,7 +57,8 @@
* optimisation) right after the _fstat() that finds the buffer size.
*/
void
-__smakebuf(FILE *fp)
+__smakebuf(fp)
+ FILE *fp;
{
void *p;
int flags;
@@ -207,39 +71,18 @@
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 (size == 0)
- size = BUFSIZ;
- }
-
- 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;
fp->_bf._size = 1;
return;
}
-#ifdef __APPLE__
- __cleanup = 1;
-#else
__cleanup = _cleanup;
-#endif // __APPLE__
flags |= __SMBF;
fp->_bf._base = fp->_p = p;
fp->_bf._size = size;
+ if (couldbetty && isatty(fp->_file))
+ flags |= __SLBF;
fp->_flags |= flags;
}
@@ -247,7 +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;
@@ -269,7 +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);
}