cdd42308ce
for now so that we don't lose library compatibility. Applications should define _NEW_VFSCONF and use getvfsbyname() instead of new_getvfsbyname() if they want the new vfsconf interface. Parts of the old interface (enough to load vfs modules, I hope) are still available.
81 lines
2.8 KiB
C
81 lines
2.8 KiB
C
/*
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* Copyright (c) 1995
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)kvm_getvfsbyname.c 8.1 (Berkeley) 4/3/95";
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#endif
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static const char rcsid[] =
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"$Id$";
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#endif /* not lint */
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#define _NEW_VFSCONF
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/sysctl.h>
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#include <errno.h>
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#include <kvm.h>
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/*
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* Given a filesystem name, determine if it is resident in the kernel,
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* and if it is resident, return its vfsconf structure.
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*/
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getvfsbyname(fsname, vfcp)
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const char *fsname;
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struct vfsconf *vfcp;
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{
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int name[4], maxtypenum, cnt;
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size_t buflen;
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name[0] = CTL_VFS;
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name[1] = VFS_GENERIC;
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name[2] = VFS_MAXTYPENUM;
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buflen = 4;
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if (sysctl(name, 3, &maxtypenum, &buflen, (void *)0, (size_t)0) < 0)
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return (-1);
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name[2] = VFS_CONF;
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buflen = sizeof *vfcp;
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for (cnt = 0; cnt < maxtypenum; cnt++) {
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name[3] = cnt;
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if (sysctl(name, 4, vfcp, &buflen, (void *)0, (size_t)0) < 0) {
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if (errno != EOPNOTSUPP)
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return (-1);
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continue;
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}
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if (!strcmp(fsname, vfcp->vfc_name))
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return (0);
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}
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errno = ENOENT;
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return (-1);
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}
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