109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/*-
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* Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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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/*
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* This file implements Solaris compatible zmount() function.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/uio.h>
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#include <sys/mntent.h>
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <mnttab.h>
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static void
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build_iovec(struct iovec **iov, int *iovlen, const char *name, void *val,
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size_t len)
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{
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int i;
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if (*iovlen < 0)
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return;
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i = *iovlen;
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*iov = realloc(*iov, sizeof(**iov) * (i + 2));
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if (*iov == NULL) {
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*iovlen = -1;
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return;
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}
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(*iov)[i].iov_base = strdup(name);
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(*iov)[i].iov_len = strlen(name) + 1;
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i++;
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(*iov)[i].iov_base = val;
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if (len == (size_t)-1) {
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if (val != NULL)
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len = strlen(val) + 1;
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else
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len = 0;
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}
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(*iov)[i].iov_len = (int)len;
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*iovlen = ++i;
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}
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int
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zmount(const char *spec, const char *dir, int mflag, char *fstype,
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char *dataptr, int datalen, char *optptr, int optlen)
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{
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struct iovec *iov;
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char *optstr, *os, *p;
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int iovlen, rv;
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assert(spec != NULL);
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assert(dir != NULL);
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assert(mflag == 0 || mflag == MS_RDONLY);
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assert(fstype != NULL);
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assert(strcmp(fstype, MNTTYPE_ZFS) == 0);
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assert(dataptr == NULL);
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assert(datalen == 0);
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assert(optptr != NULL);
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assert(optlen > 0);
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optstr = strdup(optptr);
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assert(optstr != NULL);
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iov = NULL;
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iovlen = 0;
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if (mflag & MS_RDONLY)
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build_iovec(&iov, &iovlen, "ro", NULL, 0);
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build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
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build_iovec(&iov, &iovlen, "fspath", __DECONST(char *, dir),
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(size_t)-1);
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build_iovec(&iov, &iovlen, "from", __DECONST(char *, spec), (size_t)-1);
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for (p = optstr; p != NULL; strsep(&p, ",/ ")) {
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if (*p != '\0')
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build_iovec(&iov, &iovlen, p, NULL, (size_t)-1);
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}
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rv = nmount(iov, iovlen, 0);
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free(optstr);
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return (rv);
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}
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