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bde 1997-03-02 18:13:14 +00:00
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lib/libc/gen/getvfsbyname.c Normal file
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/*
* Copyright (c) 1995
* 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
static char sccsid[] = "@(#)kvm_getvfsbyname.c 8.1 (Berkeley) 4/3/95";
#endif /* not lint */
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/sysctl.h>
#include <errno.h>
#include <kvm.h>
int getvfsbyname __P((const char *, struct vfsconf *));
/*
* Given a filesystem name, determine if it is resident in the kernel,
* and if it is resident, return its vfsconf structure.
*/
getvfsbyname(fsname, vfcp)
const char *fsname;
struct vfsconf *vfcp;
{
int name[4], maxtypenum, cnt;
size_t buflen;
name[0] = CTL_VFS;
name[1] = VFS_GENERIC;
name[2] = VFS_MAXTYPENUM;
buflen = 4;
if (sysctl(name, 3, &maxtypenum, &buflen, (void *)0, (size_t)0) < 0)
return (-1);
name[2] = VFS_CONF;
buflen = sizeof *vfcp;
for (cnt = 0; cnt < maxtypenum; cnt++) {
name[3] = cnt;
if (sysctl(name, 4, vfcp, &buflen, (void *)0, (size_t)0) < 0) {
if (errno != EOPNOTSUPP)
return (-1);
continue;
}
if (!strcmp(fsname, vfcp->vfc_name))
return (0);
}
errno = ENOENT;
return (-1);
}