/*-
* Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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.
*/
/*
* This file implements Solaris compatible getmntany() and hasmntopt()
* functions.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/mntent.h>
#include <sys/mnttab.h>
#include <stdio.h>
static char *
mntopt(char **p)
{
char *cp = *p;
char *retstr;
while (*cp && isspace(*cp))
cp++;
retstr = cp;
while (*cp && *cp != ',')
cp++;
if (*cp) {
*cp = '\0';
cp++;
}
*p = cp;
return (retstr);
}
char *
hasmntopt(struct mnttab *mnt, char *opt)
{
char tmpopts[MNT_LINE_MAX];
char *f, *opts = tmpopts;
if (mnt->mnt_mntopts == NULL)
return (NULL);
(void) strcpy(opts, mnt->mnt_mntopts);
f = mntopt(&opts);
for (; *f; f = mntopt(&opts)) {
if (strncmp(opt, f, strlen(opt)) == 0)
return (f - tmpopts + mnt->mnt_mntopts);
}
return (NULL);
}
static void
optadd(char *mntopts, size_t size, const char *opt)
{
if (mntopts[0] != '\0')
strlcat(mntopts, ",", size);
strlcat(mntopts, opt, size);
}
int
getmntany(FILE *fd __unused, struct mnttab *mgetp, struct mnttab *mrefp)
{
static struct statfs *sfs = NULL;
static char mntopts[MNTMAXSTR];
struct opt *o;
long i, n, flags;
if (sfs != NULL) {
free(sfs);
sfs = NULL;
}
mntopts[0] = '\0';
n = getfsstat(NULL, 0, MNT_NOWAIT);
if (n == -1)
return (-1);
n = sizeof(*sfs) * (n + 8);
sfs = malloc(n);
if (sfs == NULL)
return (-1);
n = getfsstat(sfs, n, MNT_WAIT);
if (n == -1) {
free(sfs);
sfs = NULL;
return (-1);
}
for (i = 0; i < n; i++) {
if (mrefp->mnt_special != NULL &&
strcmp(mrefp->mnt_special, sfs[i].f_mntfromname) != 0) {
continue;
}
if (mrefp->mnt_mountp != NULL &&
strcmp(mrefp->mnt_mountp, sfs[i].f_mntonname) != 0) {
continue;
}
if (mrefp->mnt_fstype != NULL &&
strcmp(mrefp->mnt_fstype, sfs[i].f_fstypename) != 0) {
continue;
}
flags = sfs[i].f_flags;
#define OPTADD(opt) optadd(mntopts, sizeof(mntopts), (opt))
if (flags & MNT_RDONLY)
OPTADD(MNTOPT_RO);
else
OPTADD(MNTOPT_RW);
if (flags & MNT_NOSUID)
OPTADD(MNTOPT_NOSUID);
else
OPTADD(MNTOPT_SETUID);
if (flags & MNT_UPDATE)
OPTADD(MNTOPT_REMOUNT);
if (flags & MNT_NOATIME)
OPTADD(MNTOPT_NOATIME);
else
OPTADD(MNTOPT_ATIME);
OPTADD(MNTOPT_NOXATTR);
if (flags & MNT_NOEXEC)
OPTADD(MNTOPT_NOEXEC);
else
OPTADD(MNTOPT_EXEC);
#undef OPTADD
mgetp->mnt_special = sfs[i].f_mntfromname;
mgetp->mnt_mountp = sfs[i].f_mntonname;
mgetp->mnt_fstype = sfs[i].f_fstypename;
mgetp->mnt_mntopts = mntopts;
return (0);
}
free(sfs);
sfs = NULL;
return (-1);
}
