1  /*
       2   * Copyright (C) 2011 Karel Zak <kzak@redhat.com>
       3   *
       4   * This file may be redistributed under the terms of the
       5   * GNU Lesser General Public License.
       6   */
       7  
       8  #include <string.h>
       9  
      10  #include "match.h"
      11  
      12  /*
      13   * match_fstype:
      14   * @type: filesystem type
      15   * @pattern: filesystem name or comma delimited list of names
      16   *
      17   * The @pattern list of filesystem can be prefixed with a global
      18   * "no" prefix to invert matching of the whole list. The "no" could
      19   * also be used for individual items in the @pattern list. So,
      20   * "nofoo,bar" has the same meaning as "nofoo,nobar".
      21   */
      22  int match_fstype(const char *type, const char *pattern)
      23  {
      24  	int no = 0;		/* negated types list */
      25  	int len;
      26  	const char *p;
      27  
      28  	if (!pattern && !type)
      29  		return 1;
      30  	if (!pattern)
      31  		return 0;
      32  
      33  	if (!strncmp(pattern, "no", 2)) {
      34  		no = 1;
      35  		pattern += 2;
      36  	}
      37  
      38  	/* Does type occur in types, separated by commas? */
      39  	len = strlen(type);
      40  	p = pattern;
      41  	while(1) {
      42  		if (!strncmp(p, "no", 2) && !strncasecmp(p+2, type, len) &&
      43  		    (p[len+2] == 0 || p[len+2] == ','))
      44  			return 0;
      45  		if (strncasecmp(p, type, len) == 0 && (p[len] == 0 || p[len] == ','))
      46  			return !no;
      47  		p = strchr(p,',');
      48  		if (!p)
      49  			break;
      50  		p++;
      51  	}
      52  	return no;
      53  }