fs.d/proc/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.
 */

/*  Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */


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

#include    <stdio.h>
#include    <stdlib.h>
#include    <signal.h>
#include    <errno.h>
#include    <sys/mnttab.h>
#include    <sys/mount.h>
#include    <sys/types.h>
#include    <locale.h>
#include    <sys/stat.h>
#include    <string.h>

#include    <fslib.h>

#define NAME_MAX    64  /* sizeof "fstype myname" */

#define FSTYPE      "proc"

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

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

static int  roflag = 0;
static int  mflg = 0;   /* don't update /etc/mnttab flag */
static int  Oflg = 0;
static int  qflg = 0;

static char typename[NAME_MAX], *myname;
static char fstype[] = FSTYPE;

int
main(int argc, char *argv[])
{
    char    *special, *mountp;
    int errflag = 0;
    int cc;

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

    /*
     *  check for proper arguments
     */

    while ((cc = getopt(argc, argv, "?o:rmOq")) != -1)
        switch (cc) {
        case 'm':
            mflg++;
            break;
        case 'r':
            if (roflag)
                errflag = 1;
            else
                roflag++;
            break;
        case 'O':
            Oflg++;
            break;
        case 'o':
            if (strlcpy(optbuf, optarg, sizeof (optbuf)) >=
                sizeof (optbuf)) {
                (void) fprintf(stderr,
                    gettext("%s: Invalid argument: %s\n"),
                    myname, optarg);
                return (2);
            }
            optsize = strlen(optbuf);
            break;
        case 'q':
            qflg = 1;
            break;
        case '?':
            errflag = 1;
            break;
        }

    /*
     *  There must be at least 2 more arguments, the
     *  special file and the directory.
     */

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

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

    /*
     *  Perform the mount.
     */
    do_mount(special, mountp, roflag ? MS_RDONLY : 0);

    return (0);
}

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 this fstype.\n"),
            myname, 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: the state of %s is not okay\n"
            "\tand it was attempted to mount read/write\n"),
            myname, bs);
        break;
    default:
        perror(myname);
        (void) fprintf(stderr, gettext("%s: cannot mount %s\n"),
            myname, bs);
    }
}

static void
do_mount(char *special, char *mountp, int rflag)
{
    char *savedoptbuf;

    if ((savedoptbuf = strdup(optbuf)) == NULL) {
        (void) fprintf(stderr, gettext("%s: out of memory\n"),
            myname);
        exit(2);
    }

    if (Oflg)
        rflag |= MS_OVERLAY;
    if (mflg)
        rflag |= MS_NOMNTTAB;
    if (mount(special, mountp, rflag | MS_OPTIONSTR, fstype, NULL, 0,
        optbuf, MAX_MNTOPT_STR)) {
        rpterr(special, mountp);
        exit(2);
    }
    if (optsize && !qflg)
        cmp_requested_to_actual_options(savedoptbuf, optbuf,
            special, mountp);
}

static void
usage(void)
{
    (void) fprintf(stderr,
        gettext("%s usage:\n%s [-F %s] [-r] [-o specific_options] "
        "{special | mount_point}\n%s [-F %s] [-r] [-o specific_options]"
        " special mount_point\n"),
        fstype, myname, fstype, myname, fstype);
    exit(1);
}