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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _LVM_FILE_H
#define _LVM_FILE_H
/*
* Create a temporary filename, and opens a descriptor to the file.
*/
int create_temp_name(const char *dir, char *buffer, size_t len, int *fd,
unsigned *seed);
/*
* NFS-safe rename of a temporary file to a common name, designed
* to avoid race conditions and not overwrite the destination if
* it exists.
*/
int lvm_rename(const char *old, const char *new);
/*
* Return 1 if path exists else return 0
*/
int path_exists(const char *path);
int dir_exists(const char *path);
/*
* Return 1 if dir is empty
*/
int is_empty_dir(const char *dir);
/* Sync directory changes */
void sync_dir(const char *file);
/* fcntl locking wrappers */
int fcntl_lock_file(const char *file, short lock_type, int warn_if_read_only);
void fcntl_unlock_file(int lockfd);
#define is_same_inode(buf1, buf2) \
((buf1).st_ino == (buf2).st_ino && \
(buf1).st_dev == (buf2).st_dev)
#define is_valid_fd(fd) (!(fcntl(fd, F_GETFD) == -1 && errno == EBADF))
/*
* Close the specified stream, taking care to detect and diagnose any write
* error. If there is an error, use the supplied file name in a diagnostic
* that is reported via log_error or log_sys_error, as appropriate.
* Use this function to close a stream when you've written data to it via
* unchecked fprintf, fputc, etc. calls. Return 0 on success, EOF on failure.
*/
int lvm_fclose(FILE *fp, const char *filename);
/*
* Convert stat->st_ctim status of last change in nanoseconds
* uses st_ctime when not available.
*/
void lvm_stat_ctim(struct timespec *ts, const struct stat *buf);
/* Inspired by <sys/time.h> timercmp() macro for timeval */
#define timespeccmp(tsp, usp, cmp)\
(((tsp)->tv_sec == (usp)->tv_sec) ?\
((tsp)->tv_nsec cmp (usp)->tv_nsec) :\
((tsp)->tv_sec cmp (usp)->tv_sec))
#endif
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