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