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1 /*

3 *

4 * @APPLE_LICENSE_HEADER_START@

5 *

6 * This file contains Original Code and/or Modifications of Original Code

7 * as defined in and that are subject to the Apple Public Source License

8 * Version 2.0 (the 'License'). You may not use this file except in

9 * compliance with the License. Please obtain a copy of the License at

10 * http://www.opensource.apple.com/apsl/ and read it before using this

11 * file.

12 *

13 * The Original Code and all software distributed under the License are

14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER

15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,

16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,

17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.

18 * Please see the License for the specific language governing rights and

19 * limitations under the License.

20 *

21 * @APPLE_LICENSE_HEADER_END@

22 */

23 /*

26 *

27 * Redistribution and use in source and binary forms, with or without

28 * modification, are permitted provided that the following conditions

29 * are met:

30 * 1. Redistributions of source code must retain the above copyright

31 * notice, this list of conditions and the following disclaimer.

32 * 2. Redistributions in binary form must reproduce the above copyright

33 * notice, this list of conditions and the following disclaimer in the

34 * documentation and/or other materials provided with the distribution.

35 * 3. All advertising materials mentioning features or use of this software

36 * must display the following acknowledgement:

37 * This product includes software developed by the University of

38 * California, Berkeley and its contributors.

39 * 4. Neither the name of the University nor the names of its contributors

40 * may be used to endorse or promote products derived from this software

41 * without specific prior written permission.

42 *

43 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

46 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

53 * SUCH DAMAGE.

54 */

56 #include <sys/param.h>

57 #include <sys/mount.h>

58 #include <sys/sysctl.h>

59 #include <errno.h>

60 #include <kvm.h>

61 #include <string.h>

 int getvfsbyname(const char *, struct vfsconf *);

65 /*

66 * Given a filesystem name, determine if it is resident in the kernel,

67 * and if it is resident, return its vfsconf structure.

68 */

69 int

70 getvfsbyname(fsname, vfcp)

71 const char *fsname;

72 struct vfsconf *vfcp;

73 {

         int name[4], maxtypenum, cnt;

75 size_t buflen;

77 name[0] = CTL_VFS;

78 name[1] = VFS_GENERIC;

79 name[2] = VFS_MAXTYPENUM;

80 buflen = 4;

         if (sysctl(name, 3, &maxtypenum, &buflen, (void *)0, (size_t)0) < 0)

82 return (-1);

83 name[2] = VFS_CONF;

84 buflen = sizeof *vfcp;

         for (cnt = 0; cnt < maxtypenum; cnt++) {

86 name[3] = cnt;

                 if (sysctl(name, 4, vfcp, &buflen, (void *)0, (size_t)0) < 0) {

88 if (errno != ENOTSUP)

89 return (-1);

90 continue;

91 }

                 if (!strcmp(fsname, vfcp->vfc_name))

93 return (0);

94 }

95 errno = ENOENT;

96 return (-1);

97 }