getmntopts.c

Solaris操作系统下的过滤驱动程序, C源码程序.

/*
 * Copyright (c) 1997-2003 Erez Zadok
 * Copyright (c) 2001-2003 Stony Brook University
 * Copyright (c) 1997-2000 Columbia University
 *
 * For specific licensing information, see the COPYING file distributed with
 * this package, or get one from ftp://ftp.filesystems.org/pub/fist/COPYING.
 *
 * This Copyright notice must be kept intact and distributed with all
 * fistgen sources INCLUDING sources generated by fistgen.
 */
/*-
 * Copyright (c) 1994
 *	The Regents of the University of California.  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 the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 */

#ifndef lint
#if 0
static char sccsid[] = "@(#)getmntopts.c	8.3 (Berkeley) 3/29/95";
#else
static const char rcsid[] =
"$Id: getmntopts.c,v 1.4 2002/12/27 20:18:53 ezk Exp $";
#endif
#endif /* not lint */

#include <sys/param.h>
#include <sys/mount.h>

#include <err.h>
#include <errno.h>
#include <fstab.h>
#include <stdlib.h>
#include <string.h>

#include "extern.h"
#include "mntopts.h"

int getmnt_silent = 0;

void
getmntopts(options, m0, flagp, altflagp)
     const char *options;
     const struct mntopt *m0;
     int *flagp;
     int *altflagp;
{
  const struct mntopt *m;
  int negative, len;
  char *opt, *optbuf, *p;
  int *thisflagp;

  /* Copy option string, since it is about to be torn asunder... */
  if ((optbuf = strdup(options)) == NULL)
    err(1, NULL);

  for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
    /* Check for "no" prefix. */
    if (opt[0] == 'n' && opt[1] == 'o') {
      negative = 1;
      opt += 2;
    } else
      negative = 0;

    /*
     * for options with assignments in them (ie. quotas)
     * ignore the assignment as it's handled elsewhere
     */
    p = strchr(opt, '=');
    if (p)
      *++p = '\0';

    /* Scan option table. */
    for (m = m0; m->m_option != NULL; ++m) {
      len = strlen(m->m_option);
      if (strncasecmp(opt, m->m_option, len) == 0)
	if (m->m_option[len] == '\0'
	    || m->m_option[len] == '='
	  )
	  break;
    }

    /* Save flag, or fail if option is not recognised. */
    if (m->m_option) {
      thisflagp = m->m_altloc ? altflagp : flagp;
      if (negative == m->m_inverse)
	*thisflagp |= m->m_flag;
      else
	*thisflagp &= ~m->m_flag;
    } else if (!getmnt_silent) {
      errx(1, "-o %s: option not supported", opt);
    }
  }

  free(optbuf);
}