You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
1.5 KiB
77 lines
1.5 KiB
7 months ago
|
/*
|
||
|
|
* 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 */
|
||
|
|
extern int errno;
|
||
|
|
|
||
|
|
errno = EOPNOTSUPP;
|
||
|
|
#endif /* ! HAVE_EXT2_IOCTLS */
|
||
|
|
if (rc == 0)
|
||
|
|
*version = ver;
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
}
|