usr/src/usr.sbin/amd/amd/mount_fs.c

/*
 * Copyright (c) 1990 Jan-Simon Pendry
 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Jan-Simon Pendry at Imperial College, London.
 *
 * 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.
 *
 *      @(#)mount_fs.c  5.3 (Berkeley) 5/12/91
 *
 * $Id: mount_fs.c,v 5.2.1.4 91/05/07 22:18:13 jsp Alpha $
 *
 */

#include "am.h"
#ifdef NFS_3
typedef nfs_fh fhandle_t;
#endif /* NFS_3 */
#include <sys/mount.h>

#include <sys/stat.h>

/*
 * Standard mount flags
 */
#ifdef hpux
/*
 * HP-UX has an annoying feature of printing
 * error msgs on /dev/console
 */
#undef M_NOSUID
#endif /* hpux */

struct opt_tab mnt_flags[] = {
        { "ro", M_RDONLY },
#ifdef M_CACHE
        { "nocache", M_NOCACHE },
#endif /* M_CACHE */
#ifdef M_GRPID
        { "grpid", M_GRPID },
#endif /* M_GRPID */
#ifdef M_MULTI
        { "multi", M_MULTI },
#endif /* M_MULTI */
#ifdef M_NODEV
        { "nodev", M_NODEV },
#endif /* M_NODEV */
#ifdef M_NOEXEC
        { "noexec", M_NOEXEC },
#endif /* M_NOEXEC */
#ifdef M_NOSUB
        { "nosub", M_NOSUB },
#endif /* M_NOSUB */
#ifdef M_NOSUID
        { "nosuid", M_NOSUID },
#endif /* M_NOSUID */
#ifdef M_SYNC
        { "sync", M_SYNC },
#endif /* M_SYNC */
        { 0, 0 }
};

int compute_mount_flags(mnt)
struct mntent *mnt;
{
        struct opt_tab *opt;
        int flags;
#ifdef NFS_4
        flags = M_NEWTYPE;
#else
        flags = 0;
#endif /* NFS_4 */

        /*
         * Crack basic mount options
         */
        for (opt = mnt_flags; opt->opt; opt++)
                flags |= hasmntopt(mnt, opt->opt) ? opt->flag : 0;

        return flags;
}

int mount_fs P((struct mntent *mnt, int flags, caddr_t mnt_data, int retry, MTYPE_TYPE type));
int mount_fs(mnt, flags, mnt_data, retry, type)
struct mntent *mnt;
int flags;
caddr_t mnt_data;
int retry;
MTYPE_TYPE type;
{
        int error = 0;
#ifdef MNTINFO_DEV
        struct stat stb;
        char *xopts = 0;
#endif /* MNTINFO_DEV */

#ifdef DEBUG
#ifdef NFS_4
        dlog("%s fstype %s (%s) flags %#x (%s)",
                mnt->mnt_dir, type, mnt->mnt_type, flags, mnt->mnt_opts);
#else
        dlog("%s fstype %d (%s) flags %#x (%s)",
                mnt->mnt_dir, type, mnt->mnt_type, flags, mnt->mnt_opts);
#endif /* NFS_4 */
#endif /* DEBUG */

        /*
         * Fake some mount table entries for the automounter
         */
#ifdef FASCIST_DF_COMMAND
        /*
         * Some systems have a df command which blows up when
         * presented with an unknown mount type.
         */
        if (STREQ(mnt->mnt_type, MNTTYPE_AUTO)) {
                /*
                 * Try it with the normal name
                 */
                mnt->mnt_type = MNTTYPE_NFS;
        }
#endif /* FASCIST_DF_COMMAND */

again:
        clock_valid = 0;
        error = MOUNT_TRAP(type, mnt, flags, mnt_data);
        if (error < 0)
                plog(XLOG_ERROR, "%s: mount: %m", mnt->mnt_dir);
        if (error < 0 && --retry > 0) {
                sleep(1);
                goto again;
        }
        if (error < 0) {
#ifdef notdef
                if (automount)
                        going_down(errno);
#endif
                return errno;
        }

#ifdef UPDATE_MTAB
#ifdef MNTINFO_DEV
        /*
         * Add the extra dev= field to the mount table.
         */
        if (lstat(mnt->mnt_dir, &stb) == 0) {
                char *zopts = (char *) xmalloc(strlen(mnt->mnt_opts) + 32);
                xopts = mnt->mnt_opts;
                if (sizeof(stb.st_dev) == 2) {
                        /* e.g. SunOS 4.1 */
                        sprintf(zopts, "%s,%s=%s%04lx", xopts, MNTINFO_DEV,
                                        MNTINFO_PREF, (u_long) stb.st_dev & 0xffff);
                } else {
                        /* e.g. System Vr4 */
                        sprintf(zopts, "%s,%s=%s%08lx", xopts, MNTINFO_DEV,
                                        MNTINFO_PREF, (u_long) stb.st_dev);
                }
                mnt->mnt_opts = zopts;
        }
#endif /* MNTINFO_DEV */

#ifdef FIXUP_MNTENT
        /*
         * Additional fields in struct mntent
         * are fixed up here
         */
        FIXUP_MNTENT(mnt);
#endif

        write_mntent(mnt);
#ifdef MNTINFO_DEV
        if (xopts) {
                free(mnt->mnt_opts);
                mnt->mnt_opts = xopts;
        }
#endif /* MNTINFO_DEV */
#endif /* UPDATE_MTAB */

        return 0;
}

#ifdef NEED_MNTOPT_PARSER
/*
 * Some systems don't provide these to the user,
 * but amd needs them, so...
 *
 * From: Piete Brooks <pb@cl.cam.ac.uk>
 */

#include <ctype.h>

static char *nextmntopt(p)
char **p;
{
        char *cp = *p;
        char *rp;
        /*
         * Skip past white space
         */
        while (*cp && isspace(*cp))
                cp++;
        /*
         * Word starts here
         */
        rp = cp;
        /*
         * Scan to send of string or separator
         */
        while (*cp && *cp != ',')
                cp++;
        /*
         * If separator found the overwrite with nul char.
         */
        if (*cp) {
                *cp = '\0';
                cp++;
        }
        /*
         * Return value for next call
         */
        *p = cp;
        return rp;
}

char *hasmntopt(mnt, opt)
struct mntent *mnt;
char *opt;
{
        char t[MNTMAXSTR];
        char *f;
        char *o = t;
        int l = strlen(opt);
        strcpy(t, mnt->mnt_opts);

        while (*(f = nextmntopt(&o)))
                if (strncmp(opt, f, l) == 0)
                        return f - t + mnt->mnt_opts;

        return 0;
}
#endif /* NEED_MNTOPT_PARSER */

#ifdef MOUNT_HELPER_SOURCE
#include MOUNT_HELPER_SOURCE
#endif /* MOUNT_HELPER_SOURCE */