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12eb46c8bb
an int constant to a long constant. This change improves consistency in the following two ways: 1. The first 8 arguments are always passed in registers on ia64, which by virtue of the generated code implicitly widens ints to longs and allows the use of an 32-bit integral type for 64-bit arguments. Subsequent arguments are passed onto the memory stack, which does not exhibit the same behaviour and consequently do not allow this. In practice this means that variadic functions taking pointers and given NULL (without cast) work as long as the NULL is passed in one of the first 8 arguments. A SIGSEGV is more likely the result if such would be done for stack-based arguments. This is due to the fact that the upper 4 bytes remain undefined. 2. All 64-bit platforms that FreeBSD supports, with the obvious exception of ia64, allow 32-bit integral types (specifically NULL) when 64-bit pointers are expected in variadic functions by way of how the compiler generates code. As such, code that works correctly (whether rightfully so or not) on any platform other than ia64, may fail on ia64. To more easily allow tweaking of the definition of NULL, this commit removes the 12 definitions in the various headers and puts it in a new header that can be included whenever NULL is to be made visible. This commit fixes GNOME, emacs, xemacs and a whole bunch of ports that I don't particularly care about at this time...
122 lines
4.1 KiB
C
122 lines
4.1 KiB
C
/*-
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)dirent.h 8.2 (Berkeley) 7/28/94
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* $FreeBSD$
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*/
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#ifndef _DIRENT_H_
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#define _DIRENT_H_
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/*
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* The kernel defines the format of directory entries returned by
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* the getdirentries(2) system call.
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*/
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#include <sys/cdefs.h>
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#include <sys/dirent.h>
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#if __BSD_VISIBLE || __XSI_VISIBLE
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/*
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* XXX this is probably illegal in the __XSI_VISIBLE case, but brings us closer
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* to the specification.
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*/
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#define d_ino d_fileno /* backward and XSI compatibility */
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#endif
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#if __BSD_VISIBLE
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#include <sys/_null.h>
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/* definitions for library routines operating on directories. */
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#define DIRBLKSIZ 1024
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struct _telldir; /* see telldir.h */
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/* structure describing an open directory. */
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typedef struct _dirdesc {
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int dd_fd; /* file descriptor associated with directory */
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long dd_loc; /* offset in current buffer */
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long dd_size; /* amount of data returned by getdirentries */
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char *dd_buf; /* data buffer */
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int dd_len; /* size of data buffer */
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long dd_seek; /* magic cookie returned by getdirentries */
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long dd_rewind; /* magic cookie for rewinding */
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int dd_flags; /* flags for readdir */
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void *dd_lock; /* hack to avoid including <pthread.h> */
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struct _telldir *dd_td; /* telldir position recording */
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} DIR;
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#define dirfd(dirp) ((dirp)->dd_fd)
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/* flags for opendir2 */
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#define DTF_HIDEW 0x0001 /* hide whiteout entries */
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#define DTF_NODUP 0x0002 /* don't return duplicate names */
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#define DTF_REWIND 0x0004 /* rewind after reading union stack */
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#define __DTF_READALL 0x0008 /* everything has been read */
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#else /* !__BSD_VISIBLE */
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typedef void * DIR;
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#endif /* __BSD_VISIBLE */
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#ifndef _KERNEL
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__BEGIN_DECLS
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#if __BSD_VISIBLE
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DIR *__opendir2(const char *, int);
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int alphasort(const void *, const void *);
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int getdents(int, char *, int);
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int getdirentries(int, char *, int, long *);
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#endif
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DIR *opendir(const char *);
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struct dirent *
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readdir(DIR *);
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#if __POSIX_VISIBLE >= 199506 || __XSI_VISIBLE >= 500
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int readdir_r(DIR *, struct dirent *, struct dirent **);
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#endif
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void rewinddir(DIR *);
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#if __BSD_VISIBLE
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int scandir(const char *, struct dirent ***,
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int (*)(struct dirent *), int (*)(const void *, const void *));
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#endif
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#if __XSI_VISIBLE
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void seekdir(DIR *, long);
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long telldir(DIR *);
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#endif
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int closedir(DIR *);
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__END_DECLS
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#endif /* !_KERNEL */
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#endif /* !_DIRENT_H_ */
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