b33c1067f8
and restoring the metadata. In particular, the metadata-restore functions now all accept a file descriptor and a pathname. If the file descriptor is set and the platform supports the appropriate syscall, restore the metadata through the file descriptor. Otherwise, restore it through the pathname. This is complicated by varying syscall support (FreeBSD has an fchmod(2) but no fchflags(2), for example) and because non-file entries don't have an fd to use in restoring attributes (for example, mknod(2) doesn't return a file handle). MFC after: 14 days
190 lines
6.1 KiB
C
190 lines
6.1 KiB
C
/*-
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* Copyright (c) 2003-2004 Tim Kientzle
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* 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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* in this position and unchanged.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* This header is the first thing included in any of the libarchive
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* source files. As far as possible, platform-specific issues should
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* be dealt with here and not within individual source files. I'm
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* actively trying to minimize #if blocks within the main source,
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* since they obfuscate the code.
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*/
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#ifndef ARCHIVE_PLATFORM_H_INCLUDED
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#define ARCHIVE_PLATFORM_H_INCLUDED
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#if HAVE_CONFIG_H
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#include "config.h"
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#else
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/* A default configuration for FreeBSD, used if there is no config.h. */
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#ifdef __FreeBSD__
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#if __FreeBSD__ > 4
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#define HAVE_ACL_CREATE_ENTRY 1
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#define HAVE_ACL_INIT 1
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#define HAVE_ACL_SET_FD 1
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#define HAVE_ACL_SET_FD_NP 1
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#define HAVE_ACL_SET_FILE 1
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#endif
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#define HAVE_BZLIB_H 1
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#define HAVE_CHFLAGS 1
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#define HAVE_DECL_STRERROR_R 1
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#define HAVE_EFTYPE 1
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#define HAVE_EILSEQ 1
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#define HAVE_ERRNO_H 1
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#define HAVE_FCHDIR 1
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#define HAVE_FCHMOD 1
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#define HAVE_FCHOWN 1
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#define HAVE_FCNTL_H 1
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#define HAVE_FUTIMES 1
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#define HAVE_INTTYPES_H 1
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#define HAVE_LCHMOD 1
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#define HAVE_LCHOWN 1
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#define HAVE_LIMITS_H 1
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#define HAVE_LUTIMES 1
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#define HAVE_MALLOC 1
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#define HAVE_MEMMOVE 1
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#define HAVE_MEMORY_H 1
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#define HAVE_MEMSET 1
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#define HAVE_MKDIR 1
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#define HAVE_MKFIFO 1
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#define HAVE_PATHS_H 1
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#define HAVE_STDINT_H 1
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#define HAVE_STDLIB_H 1
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#define HAVE_STRCHR 1
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#define HAVE_STRDUP 1
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#define HAVE_STRERROR 1
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#define HAVE_STRERROR_R 1
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#define HAVE_STRINGS_H 1
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#define HAVE_STRING_H 1
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#define HAVE_STRRCHR 1
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#define HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC 1
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#define HAVE_STRUCT_STAT_ST_RDEV 1
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#define HAVE_SYS_ACL_H 1
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#define HAVE_SYS_IOCTL_H 1
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#define HAVE_SYS_STAT_H 1
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#define HAVE_SYS_TIME_H 1
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#define HAVE_SYS_TYPES_H 1
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#define HAVE_SYS_WAIT_H 1
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#define HAVE_UNISTD_H 1
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#define HAVE_WCHAR_H 1
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#define HAVE_ZLIB_H 1
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#define STDC_HEADERS 1
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#define TIME_WITH_SYS_TIME 1
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#else /* !__FreeBSD__ */
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/* Warn if the library hasn't been (automatically or manually) configured. */
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#error Oops: No config.h and no built-in configuration in archive_platform.h.
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#endif /* !__FreeBSD__ */
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#endif /* !HAVE_CONFIG_H */
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/* No non-FreeBSD platform will have __FBSDID, so just define it here. */
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#ifdef __FreeBSD__
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#include <sys/cdefs.h> /* For __FBSDID */
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#else
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#define __FBSDID(a) /* null */
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#endif
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#if HAVE_INTTYPES_H
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#include <inttypes.h>
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#endif
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/* FreeBSD 4 and earlier lack intmax_t/uintmax_t */
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#if defined(__FreeBSD__) && __FreeBSD__ < 5
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#define intmax_t int64_t
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#define uintmax_t uint64_t
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#endif
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/*
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* If this platform has <sys/acl.h>, acl_create(), acl_init(), and
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* acl_set_file(), we assume it has the rest of the POSIX.1e draft
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* functions used in archive_read_extract.c.
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*/
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#if HAVE_SYS_ACL_H && HAVE_ACL_CREATE_ENTRY && HAVE_ACL_INIT && HAVE_ACL_SET_FILE
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#define HAVE_POSIX_ACL 1
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#endif
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/*
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* If we can't restore metadata using a file descriptor, then
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* for compatibility's sake, close files before trying to restore metadata.
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*/
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#if defined(HAVE_FCHMOD) || defined(HAVE_FUTIMES) || defined(HAVE_ACL_SET_FD) || defined(HAVE_ACL_SET_FD_NP) || defined(HAVE_FCHOWN)
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#define CAN_RESTORE_METADATA_FD
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#endif
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/* Set up defaults for internal error codes. */
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#ifndef ARCHIVE_ERRNO_FILE_FORMAT
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#if HAVE_EFTYPE
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#define ARCHIVE_ERRNO_FILE_FORMAT EFTYPE
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#else
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#if HAVE_EILSEQ
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#define ARCHIVE_ERRNO_FILE_FORMAT EILSEQ
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#else
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#define ARCHIVE_ERRNO_FILE_FORMAT EINVAL
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#endif
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#endif
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#endif
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#ifndef ARCHIVE_ERRNO_PROGRAMMER
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#define ARCHIVE_ERRNO_PROGRAMMER EINVAL
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#endif
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#ifndef ARCHIVE_ERRNO_MISC
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#define ARCHIVE_ERRNO_MISC (-1)
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#endif
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/* Select the best way to set/get hi-res timestamps. */
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#if HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC
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/* FreeBSD uses "timespec" members. */
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#define ARCHIVE_STAT_ATIME_NANOS(st) (st)->st_atimespec.tv_nsec
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#define ARCHIVE_STAT_CTIME_NANOS(st) (st)->st_ctimespec.tv_nsec
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#define ARCHIVE_STAT_MTIME_NANOS(st) (st)->st_mtimespec.tv_nsec
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#define ARCHIVE_STAT_SET_ATIME_NANOS(st, n) (st)->st_atimespec.tv_nsec = (n)
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#define ARCHIVE_STAT_SET_CTIME_NANOS(st, n) (st)->st_ctimespec.tv_nsec = (n)
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#define ARCHIVE_STAT_SET_MTIME_NANOS(st, n) (st)->st_mtimespec.tv_nsec = (n)
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#else
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#if HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
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/* Linux uses "tim" members. */
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#define ARCHIVE_STAT_ATIME_NANOS(pstat) (pstat)->st_atim.tv_nsec
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#define ARCHIVE_STAT_CTIME_NANOS(pstat) (pstat)->st_ctim.tv_nsec
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#define ARCHIVE_STAT_MTIME_NANOS(pstat) (pstat)->st_mtim.tv_nsec
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#define ARCHIVE_STAT_SET_ATIME_NANOS(st, n) (st)->st_atim.tv_nsec = (n)
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#define ARCHIVE_STAT_SET_CTIME_NANOS(st, n) (st)->st_ctim.tv_nsec = (n)
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#define ARCHIVE_STAT_SET_MTIME_NANOS(st, n) (st)->st_mtim.tv_nsec = (n)
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#else
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/* If we can't find a better way, just use stubs. */
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#define ARCHIVE_STAT_ATIME_NANOS(pstat) 0
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#define ARCHIVE_STAT_CTIME_NANOS(pstat) 0
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#define ARCHIVE_STAT_MTIME_NANOS(pstat) 0
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#define ARCHIVE_STAT_SET_ATIME_NANOS(st, n)
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#define ARCHIVE_STAT_SET_CTIME_NANOS(st, n)
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#define ARCHIVE_STAT_SET_MTIME_NANOS(st, n)
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#endif
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#endif
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#endif /* !ARCHIVE_H_INCLUDED */
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