| 0,0 → 1,113 |
|---|
| /* |
| * Copyright (c) 1990, 2007 The Regents of the University of California. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms are permitted |
| * provided that the above copyright notice and this paragraph are |
| * duplicated in all such forms and that any documentation, |
| * advertising materials, and other materials related to such |
| * distribution and use acknowledge that the software was developed |
| * by the University of California, Berkeley. The name of the |
| * University may not be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| /* No user fns here. Pesch 15apr92. */ |
| |
| #include <_ansi.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <sys/unistd.h> |
| #include "local.h" |
| |
| #define _DEFAULT_ASPRINTF_BUFSIZE 64 |
| |
| /* |
| * Allocate a file buffer, or switch to unbuffered I/O. |
| * Per the ANSI C standard, ALL tty devices default to line buffered. |
| * |
| * As a side effect, we set __SOPT or __SNPT (en/dis-able fseek |
| * optimization) right after the _fstat() that finds the buffer size. |
| */ |
| |
| _VOID |
| _DEFUN(__smakebuf_r, (ptr, fp), |
| struct _reent *ptr _AND |
| register FILE *fp) |
| { |
| register size_t size, couldbetty; |
| register _PTR p; |
| #ifdef __USE_INTERNAL_STAT64 |
| struct stat64 st; |
| #else |
| struct stat st; |
| #endif |
| |
| if (fp->_flags & __SNBF) |
| { |
| fp->_bf._base = fp->_p = fp->_nbuf; |
| fp->_bf._size = 1; |
| return; |
| } |
| #ifdef __USE_INTERNAL_STAT64 |
| if (fp->_file < 0 || _fstat64_r (ptr, fp->_file, &st) < 0) |
| #else |
| if (fp->_file < 0 || _fstat_r (ptr, fp->_file, &st) < 0) |
| #endif |
| { |
| couldbetty = 0; |
| /* Check if we are be called by asprintf family for initial buffer. */ |
| if (fp->_flags & __SMBF) |
| size = _DEFAULT_ASPRINTF_BUFSIZE; |
| else |
| size = BUFSIZ; |
| /* do not try to optimise fseek() */ |
| fp->_flags |= __SNPT; |
| } |
| else |
| { |
| couldbetty = (st.st_mode & S_IFMT) == S_IFCHR; |
| #ifdef HAVE_BLKSIZE |
| size = st.st_blksize <= 0 ? BUFSIZ : st.st_blksize; |
| #else |
| size = BUFSIZ; |
| #endif |
| /* |
| * Optimize fseek() only if it is a regular file. |
| * (The test for __sseek is mainly paranoia.) |
| */ |
| if ((st.st_mode & S_IFMT) == S_IFREG && fp->_seek == __sseek) |
| { |
| fp->_flags |= __SOPT; |
| #ifdef HAVE_BLKSIZE |
| fp->_blksize = st.st_blksize; |
| #else |
| fp->_blksize = 1024; |
| #endif |
| } |
| else |
| fp->_flags |= __SNPT; |
| } |
| if ((p = _malloc_r (ptr, size)) == NULL) |
| { |
| if (!(fp->_flags & __SSTR)) |
| { |
| fp->_flags |= __SNBF; |
| fp->_bf._base = fp->_p = fp->_nbuf; |
| fp->_bf._size = 1; |
| } |
| } |
| else |
| { |
| ptr->__cleanup = _cleanup_r; |
| fp->_flags |= __SMBF; |
| fp->_bf._base = fp->_p = (unsigned char *) p; |
| fp->_bf._size = size; |
| if (couldbetty && _isatty_r (ptr, fp->_file)) |
| fp->_flags |= __SLBF; |
| } |
| } |