libsmbfs/smb/file.c

	file.c revision 4bff34e37def8a90f9194d81bc345c52ba20086a
/*
 * Copyright (c) 2000, Boris Popov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by Boris Popov.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $Id: file.c,v 1.4 2004/12/13 00:25:21 lindak Exp $
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/mount.h>
#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include <pwd.h>
#include <grp.h>
#include <unistd.h>

#include <sys/types.h>
extern uid_t real_uid, eff_uid;

#include <netsmb/smb_lib.h>
#include <cflib.h>

int
smb_read(struct smb_ctx *ctx, smbfh fh, off_t offset, size_t count, char *dst)
{
    struct smbioc_rw rwrq;

    bzero(&rwrq, sizeof (rwrq));
    rwrq.ioc_fh = fh;
    rwrq.ioc_base = dst;
    rwrq.ioc_cnt = count;
    rwrq.ioc_offset = offset;
    seteuid(eff_uid);
    if (ioctl(ctx->ct_fd, SMBIOC_READ, &rwrq) == -1) {
        seteuid(real_uid); /* and back to real user */
        return (-1);
    }
    seteuid(real_uid); /* and back to real user */
    return (rwrq.ioc_cnt);
}

int
smb_write(struct smb_ctx *ctx, smbfh fh, off_t offset, size_t count,
    const char *src)
{
    struct smbioc_rw rwrq;

    bzero(&rwrq, sizeof (rwrq));
    rwrq.ioc_fh = fh;
    rwrq.ioc_base = (char *)src;
    rwrq.ioc_cnt = count;
    rwrq.ioc_offset = offset;
    seteuid(eff_uid);
    if (ioctl(ctx->ct_fd, SMBIOC_WRITE, &rwrq) == -1) {
        seteuid(real_uid); /* and back to real user */
        return (-1);
    }
    seteuid(real_uid); /* and back to real user */
    return (rwrq.ioc_cnt);
}