fs.d/ctfs/mount.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

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

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libintl.h>
#include <errno.h>
#include <sys/fstyp.h>
#include <sys/fsid.h>
#include <sys/mntent.h>
#include <sys/mnttab.h>
#include <sys/mount.h>
#include <sys/signal.h>
#include <sys/stat.h>
#include <fslib.h>
#include <locale.h>

#define RET_OK      0
#define RET_ERR     33
#define EXIT_MAGIC  2

static void usage(void);

static char  optbuf[MAX_MNTOPT_STR] = { '\0', };
static int   optsize = 0;

static char fstype[] = "ctfs";

/*
 * usage: mount [-Ormq] [-o options] special mountp
 *
 * This mount program is exec'ed by /usr/sbin/mount if '-F ctfs' is
 * specified.
 */
int
main(int argc, char *argv[])
{
    int c;
    char *special;      /* Entity being mounted */
    char *mountp;       /* Entity being mounted on */
    char *savedoptbuf;
    char *myname;
    char *typename;
    int flags = 0;
    int error_flag = 0;
    int q_flag = 0;

    int len;

    (void) setlocale(LC_ALL, "");

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


    myname = strrchr(argv[0], '/');
    myname = myname ? myname + 1 : argv[0];

    len = strlen(fstype) + 1 + strlen(myname);
    typename = malloc(len + 1);
    if (!typename) {
        (void) fprintf(stderr, gettext("%s: out of memory\n"),
            myname);
        return (EXIT_MAGIC);
    }

    (void) snprintf(typename, len, "%s %s", fstype, myname);
    argv[0] = typename;

    while ((c = getopt(argc, argv, "o:rmOq")) != EOF) {
        switch (c) {
        case '?':
            error_flag = 1;
            break;

        case 'o':
            if (strlcpy(optbuf, optarg, sizeof (optbuf)) >=
                sizeof (optbuf)) {
                (void) fprintf(stderr,
                    gettext("%s: Invalid argument: %s\n"),
                    myname, optarg);
                free(typename);
                return (EXIT_MAGIC);
            }
            optsize = strlen(optbuf);
            break;
        case 'O':
            flags |= MS_OVERLAY;
            break;
        case 'r':
            flags |= MS_RDONLY;
            break;

        case 'm':
            flags |= MS_NOMNTTAB;
            break;

        case 'q':
            q_flag = 1;
            break;

        default:
            usage();
        }
    }
    if ((argc - optind != 2) || error_flag) {
        usage();
    }
    special = argv[argc - 2];
    mountp = argv[argc - 1];

    if ((savedoptbuf = strdup(optbuf)) == NULL) {
        (void) fprintf(stderr, gettext("%s: out of memory\n"),
            myname);
        free(typename);
        exit(EXIT_MAGIC);
    }
    if (mount(special, mountp, flags | MS_OPTIONSTR, fstype, NULL, 0,
        optbuf, MAX_MNTOPT_STR)) {
        (void) fprintf(stderr, "mount: ");
        perror(special);
        free(typename);
        exit(RET_ERR);
    }
    if (optsize && !q_flag)
        cmp_requested_to_actual_options(savedoptbuf, optbuf,
            special, mountp);
    free(typename);
    return (RET_OK);
}

static void
usage(void)
{
    (void) fprintf(stderr,
        gettext("Usage: mount [-Ormq] [-o options] special mountpoint\n"));
    exit(RET_ERR);
}