hsfs/mount/mount.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <ctype.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h> /* defines F_LOCK for lockf */
#include <stdlib.h> /* for getopt(3) */
#include <signal.h>
#include <locale.h>
#include <fslib.h>
#include <sys/types.h>
#include <errno.h>
#include <sys/mnttab.h>
#include <sys/mntent.h>
#include <sys/mount.h>
#include <sys/vfs.h>
#include <sys/fs/hsfs_susp.h>
#include <sys/fs/hsfs_rrip.h>

extern int optind;
extern char *optarg;

#define NAME_MAX    64
#define GLOBAL      0
#define NOGLOBAL    1

#ifndef MNTOPT_NOGLOBAL
#define MNTOPT_NOGLOBAL "noglobal"
#endif  /* MNTOPT_NOGLOBAL */

static int gflg     = 0;    /* mount into global name space: flag form */
static int global   = 0;    /* mount into global name space: option form */
static int havegblopt   = 0;    /* global value supercedes gflg value */
static int qflg     = 0;    /* quiet option - don't flag bad options */

static char fstype[] = MNTTYPE_HSFS;

static char typename[NAME_MAX], *myname;
/*
 * Mount options that require special handling
 */
static char *myopts[] = {
    MNTOPT_GLOBAL,
    MNTOPT_NOGLOBAL,
    NULL
};


static void rpterr(char *, char *);
static void usage(void);

int
main(int argc, char **argv)
{
    char *options, *value;
    char *special, *mountp;
    char *gopt;
    struct mnttab mm;
    int c;
    char    obuff[MAX_MNTOPT_STR];
    char    saved_input_options[MAX_MNTOPT_STR];
    int hsfs_flags;

    int flags;
    int Oflg = 0;   /* Overlay mounts */

    (void) setlocale(LC_ALL, "");

#if !defined(TEXT_DOMAIN)
#define TEXT_DOMAIN "SYS_TEST"
#endif
    (void) textdomain(TEXT_DOMAIN);

    myname = strrchr(argv[0], '/');
    if (myname)
        myname++;
    else
        myname = argv[0];
    snprintf(typename, sizeof (typename), "%s %s", fstype, myname);
    argv[0] = typename;

    /*
     * Check for arguments requiring special handling.  Ignore
     * unrecognized options.
     */
    strcpy(obuff, "ro");    /* default */
    while ((c = getopt(argc, argv, "o:rmOgq")) != EOF) {
        switch (c) {
            case 'o':
                if (strlen(optarg) > MAX_MNTOPT_STR) {
                    (void) fprintf(stderr, gettext(
                        "%s: option set too long\n"),
                        myname);
                    exit(1);
                }
                if (strlen(optarg) == 0) {
                    (void) fprintf(stderr, gettext(
                        "%s: missing suboptions\n"),
                        myname);
                    exit(1);
                }
                strcpy(obuff, optarg);
                options = optarg;
                while (*options != '\0') {
                    switch (getsubopt(&options, myopts,
                        &value)) {
                    case GLOBAL:
                        havegblopt = 1;
                        global = 1;
                        break;
                    case NOGLOBAL:
                        havegblopt = 1;
                        global = 0;
                        break;
                    }
                }
                break;
            case 'O':
                Oflg++;
                break;
            case 'r':
                /* accept for backwards compatibility */
                break;
            case 'm':
                break;
            case 'g':
                gflg++;
                break;
            case 'q':
                qflg++;
                break;

        }
    }

    if ((argc - optind) != 2)
        usage();

    special = argv[optind++];
    mountp = argv[optind++];

    /*
     * Force readonly.  obuff is guaranteed to have something in
     * it.  We might end up with "ro,ro", but that's acceptable.
     */
    flags = MS_RDONLY;

    if ((strlen(obuff) + strlen(MNTOPT_RO) + 2) > MAX_MNTOPT_STR) {
        (void) fprintf(stderr, gettext("%s: option set too long\n"),
            myname);
        exit(1);
    }

    strcat(obuff, ",");
    strcat(obuff, MNTOPT_RO);

    flags |= Oflg ? MS_OVERLAY : 0;

    /*
     * xxx it's not clear if should just put MS_GLOBAL in flags,
     * or provide it as a string.  Be safe, do both.  The subopt
     * version has precedence over the switch version.
     */
    gopt = NULL;
    if ((havegblopt && global) || gflg) {
        gopt = MNTOPT_GLOBAL;
        flags |= MS_GLOBAL;
    } else if (havegblopt) {
        gopt = MNTOPT_NOGLOBAL;
    }

    if (gopt != NULL) {
        if ((strlen(obuff) + strlen(gopt) + 2) > MAX_MNTOPT_STR) {
            (void) fprintf(stderr,
                gettext("%s: option set too long\n"), myname);
            exit(1);
        }

        strcat(obuff, ",");
        strcat(obuff, gopt);
    }

    signal(SIGHUP,  SIG_IGN);
    signal(SIGQUIT, SIG_IGN);
    signal(SIGINT,  SIG_IGN);

    /*
     * Save a copy of the options to compare with the options that
     * were actually recognized and supported by the kernel.
     */

    (void) strcpy(saved_input_options, obuff);

    /*
     * Perform the mount.
     */

    if (mount(special, mountp, flags | MS_OPTIONSTR, fstype, NULL, 0,
        obuff, sizeof (obuff)) == -1) {
        rpterr(special, mountp);
        exit(31+2);
    }

    if (!qflg) {
        cmp_requested_to_actual_options(saved_input_options, obuff,
            special, mountp);
    }

    exit(0);
    /* NOTREACHED */
}


static void
rpterr(char *bs, char *mp)
{
    switch (errno) {
    case EPERM:
        (void) fprintf(stderr, gettext("%s: insufficient privileges\n"),
            myname);
        break;
    case ENXIO:
        (void) fprintf(stderr, gettext("%s: %s no such device\n"),
            myname, bs);
        break;
    case ENOTDIR:
        (void) fprintf(stderr, gettext("%s: %s not a directory\n\tor a "
            "component of %s is not a directory\n"), myname, mp, bs);
        break;
    case ENOENT:
        (void) fprintf(stderr,
            gettext("%s: %s or %s, no such file or directory\n"),
            myname, bs, mp);
        break;
    case EINVAL:
        (void) fprintf(stderr, gettext("%s: %s is not an hsfs file "
            "system.\n"), typename, bs);
        break;
    case EBUSY:
        (void) fprintf(stderr,
            gettext("%s: %s is already mounted or %s is busy\n"),
            myname, bs, mp);
        break;
    case ENOTBLK:
        (void) fprintf(stderr,
            gettext("%s: %s not a block device\n"), myname, bs);
        break;
    case EROFS:
        (void) fprintf(stderr, gettext("%s: %s write-protected\n"),
            myname, bs);
        break;
    case ENOSPC:
        (void) fprintf(stderr,
            gettext("%s: %s is corrupted. needs checking\n"),
            myname, bs);
        break;
    default:
        perror(myname);
        (void) fprintf(stderr, gettext("%s: cannot mount %s\n"), myname,
            bs);
    }
}


static void
usage()
{
    char *opts;

opts = "{-r | -o ro | -o nrr | -o nosuid | -o notraildot | -o nomaplcase}";
    (void) fprintf(stdout,
gettext("hsfs usage: mount [-F hsfs] %s {special | mount_point}\n"), opts);
    (void) fprintf(stdout,
gettext("hsfs usage: mount [-F hsfs] %s special mount_point\n"), opts);
    exit(32);
}