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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)
*
* This file can be redistributed under the terms of the GNU Library General
* Public License
*/
/*
* History:
* 93/10/30 - Creation
*/
#if HAVE_ERRNO_H
#include <errno.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#include <sys/ioctl.h>
#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)
{
#if HAVE_EXT2_IOCTLS
#if !APPLE_DARWIN
int fd, r, ver, save_errno = 0;
fd = open (name, OPEN_FLAGS);
if (fd == -1)
return -1;
r = ioctl (fd, EXT2_IOC_GETVERSION, &ver);
if (r == -1)
save_errno = errno;
*version = ver;
close (fd);
if (save_errno)
errno = save_errno;
return r;
#else
int ver=-1, err;
err = syscall(SYS_fsctl, name, EXT2_IOC_GETVERSION, &ver, 0);
*version = ver;
return(err);
#endif
#else /* ! HAVE_EXT2_IOCTLS */
extern int errno;
errno = EOPNOTSUPP;
return -1;
#endif /* ! HAVE_EXT2_IOCTLS */
}
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