1/*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#if defined(LIBC_SCCS) && !defined(lint) 34static char sccsid[] = "@(#)makebuf.c 8.1 (Berkeley) 6/4/93"; 35#endif /* LIBC_SCCS and not lint */ 36#include <sys/cdefs.h> |
37__FBSDID("$FreeBSD: head/lib/libc/stdio/makebuf.c 249810 2013-04-23 14:36:44Z emaste $"); |
38 39#include "namespace.h" 40#include <sys/types.h> 41#include <sys/stat.h> 42#include <unistd.h> 43#include <stdio.h> 44#include <stdlib.h> 45#include "un-namespace.h" --- 4 unchanged lines hidden (view full) --- 50/* 51 * Allocate a file buffer, or switch to unbuffered I/O. 52 * Per the ANSI C standard, ALL tty devices default to line buffered. 53 * 54 * As a side effect, we set __SOPT or __SNPT (en/dis-able fseek 55 * optimisation) right after the _fstat() that finds the buffer size. 56 */ 57void |
58__smakebuf(FILE *fp) |
59{ 60 void *p; 61 int flags; 62 size_t size; 63 int couldbetty; 64 65 if (fp->_flags & __SNBF) { 66 fp->_bf._base = fp->_p = fp->_nbuf; --- 15 unchanged lines hidden (view full) --- 82 flags |= __SLBF; 83 fp->_flags |= flags; 84} 85 86/* 87 * Internal routine to determine `proper' buffering for a file. 88 */ 89int |
90__swhatbuf(FILE *fp, size_t *bufsize, int *couldbetty) |
91{ 92 struct stat st; 93 94 if (fp->_file < 0 || _fstat(fp->_file, &st) < 0) { 95 *couldbetty = 0; 96 *bufsize = BUFSIZ; 97 return (__SNPT); 98 } --- 18 unchanged lines hidden --- |