busybox

/* vi: set sw=4 ts=4: */

/*

 * mountopts.c --- convert between default mount options and strings

 *

 * Copyright (C) 2002  Theodore Ts'o <tytso@mit.edu>

 *

 * This file can be redistributed under the terms of the GNU Library General

 * Public License

 *

 */

​

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <ctype.h>

#include <errno.h>

​

#include "e2p.h"

​

struct mntopt {

    unsigned int    mask;

    const char  *string;

};

​

static const struct mntopt mntopt_list[] = {

    { EXT2_DEFM_DEBUG,  "debug" },

    { EXT2_DEFM_BSDGROUPS,  "bsdgroups" },

    { EXT2_DEFM_XATTR_USER, "user_xattr" },

    { EXT2_DEFM_ACL,    "acl" },

    { EXT2_DEFM_UID16,  "uid16" },

    { EXT3_DEFM_JMODE_DATA, "journal_data" },

    { EXT3_DEFM_JMODE_ORDERED, "journal_data_ordered" },

    { EXT3_DEFM_JMODE_WBACK, "journal_data_writeback" },

    { 0, 0 },

};

​

const char *e2p_mntopt2string(unsigned int mask)

{

    const struct mntopt  *f;

    static char buf[20];

    int fnum;

​

    for (f = mntopt_list; f->string; f++) {

        if (mask == f->mask)

            return f->string;

    }

    for (fnum = 0; mask >>= 1; fnum++);

    sprintf(buf, "MNTOPT_%d", fnum);

    return buf;

}

​

int e2p_string2mntopt(char *string, unsigned int *mask)

{

    const struct mntopt  *f;

    char        *eptr;

    int     num;

​

    for (f = mntopt_list; f->string; f++) {

        if (!strcasecmp(string, f->string)) {

            *mask = f->mask;

            return 0;

        }

    }