68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/*
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* Copyright (C) 2011 Andrea Mazzoleni
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __UNIX_H
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#define __UNIX_H
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#ifdef __linux__
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#define HAVE_LINUX_DEVICE 1 /**< In Linux enables special device support. */
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#define HAVE_DIRECT_IO 1 /**< Support O_DIRECT in open(). */
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#endif
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#define O_BINARY 0 /**< Not used in Unix. */
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#define O_SEQUENTIAL 0 /**< In Unix posix_fadvise() shall be used. */
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/**
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* If nanoseconds are not supported, we report the special STAT_NSEC_INVALID value,
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* to mark that it's undefined.
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*/
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#define STAT_NSEC_INVALID -1
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/* Check if we have nanoseconds support */
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#if HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
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#define STAT_NSEC(st) ((int)(st)->st_mtim.tv_nsec) /* Linux */
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#elif HAVE_STRUCT_STAT_ST_MTIMENSEC
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#define STAT_NSEC(st) ((int)(st)->st_mtimensec) /* NetBSD */
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#elif HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC
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#define STAT_NSEC(st) ((int)(st)->st_mtimespec.tv_nsec) /* FreeBSD, Mac OS X */
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#else
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#define STAT_NSEC(st) STAT_NSEC_INVALID
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#endif
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/**
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* Open a file with the O_NOATIME flag to avoid to update the access time.
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*/
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int open_noatime(const char* file, int flags);
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/**
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* Check if the specified file is hidden.
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*/
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int dirent_hidden(struct dirent* dd);
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/**
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* Return a description of the file type.
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*/
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const char* stat_desc(struct stat* st);
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/**
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* Return the alignment requirement for direct IO.
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*/
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size_t direct_size(void);
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#endif
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