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/*
* fgetversion.c - Get a file version on an ext2 file system
*
* Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
* Laboratoire MASI, Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Library
* General Public License, version 2.
* %End-Header%
*/
/*
* History:
* 93/10/30 - Creation
*/
#ifndef _LARGEFILE_SOURCE
#define _LARGEFILE_SOURCE
#endif
#ifndef _LARGEFILE64_SOURCE
#define _LARGEFILE64_SOURCE
#endif
#include "config.h"
#if HAVE_ERRNO_H
#include <errno.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#if HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#include "e2p.h"
#ifdef O_LARGEFILE
#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
#else
#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
#endif
int fgetversion(const char *name, unsigned long *version)
{
unsigned int ver = -1;
int rc = -1;
#if HAVE_EXT2_IOCTLS
# if !APPLE_DARWIN
int fd, save_errno = 0;
fd = open(name, OPEN_FLAGS);
if (fd == -1)
return -1;
rc = ioctl(fd, EXT2_IOC_GETVERSION, &ver);
if (rc == -1)
save_errno = errno;
close(fd);
if (rc == -1)
errno = save_errno;
# else /* APPLE_DARWIN */
rc = syscall(SYS_fsctl, name, EXT2_IOC_GETVERSION, &ver, 0);
# endif /* !APPLE_DARWIN */
#else /* ! HAVE_EXT2_IOCTLS */
errno = EOPNOTSUPP;
#endif /* ! HAVE_EXT2_IOCTLS */
if (rc == 0)
*version = ver;
return rc;
}
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