adtools/clib2

/*
 * $Id: mount_statfs.c,v 1.7 2006-01-08 12:04:24 obarthel Exp $
 *
 * :ts=4
 *
 * Portable ISO 'C' (1994) runtime library for the Amiga computer
 * Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Neither the name of Olaf Barthel nor the names of contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
 */

#ifndef _STDLIB_NULL_POINTER_CHECK_H
#include "stdlib_null_pointer_check.h"
#endif /* _STDLIB_NULL_POINTER_CHECK_H */

/****************************************************************************/

#ifndef _MOUNT_HEADERS_H
#include "mount_headers.h"
#endif /* _MOUNT_HEADERS_H */

/****************************************************************************/

/* The following is not part of the ISO 'C' (1994) standard. */

/****************************************************************************/

int
statfs(const char *path, struct statfs *buf)
{
    #if defined(UNIX_PATH_SEMANTICS)
    struct name_translation_info path_nti;
    #endif /* UNIX_PATH_SEMANTICS */
    D_S(struct InfoData,id);
    LONG status;
    BPTR lock = ZERO;
    int result = ERROR;

    ENTER();

    SHOWSTRING(path);
    SHOWPOINTER(buf);

    if(__check_abort_enabled)
        __check_abort();

    assert( path != NULL && buf != NULL );

    #if defined(CHECK_FOR_NULL_POINTERS)
    {
        if(path == NULL || buf == NULL)
        {
            SHOWMSG("invalid parameters");

            __set_errno(EFAULT);
            goto out;
        }
    }
    #endif /* CHECK_FOR_NULL_POINTERS */

    #if defined(UNIX_PATH_SEMANTICS)
    {
        if(__unix_path_semantics)
        {
            if(path[0] == '\0')
            {
                SHOWMSG("no name given");

                __set_errno(ENOENT);
                goto out;
            }

            if(__translate_unix_to_amiga_path_name(&path,&path_nti) != 0)
                goto out;

            SHOWSTRING(path);

            /* The pseudo root directory is a very special case indeed.
             * We make up some pseudo data for it.
             */
            if(path_nti.is_root)
            {
                SHOWMSG("returning data for / directory");

                memset(buf,0,sizeof(*buf));

                buf->f_bsize    = 512;
                buf->f_blocks    = 1;
                buf->f_bfree    = 1;
                buf->f_iosize    = buf->f_bsize;
                buf->f_bavail    = buf->f_bfree;
                buf->f_flags    = MNT_NOATIME|MNT_SYMPERM|MNT_LOCAL|MNT_RDONLY;

                result = OK;

                goto out;
            }
        }
    }
    #endif /* UNIX_PATH_SEMANTICS */

    D(("trying to get a lock on '%s'",path));

    PROFILE_OFF();
    lock = Lock((STRPTR)path,SHARED_LOCK);
    PROFILE_ON();

    if(lock == ZERO)
    {
        SHOWMSG("that didn't work");

        __set_errno(__translate_access_io_error_to_errno(IoErr()));
        goto out;
    }

    PROFILE_OFF();
    status = Info(lock,id);
    PROFILE_ON();

    if(status == DOSFALSE)
    {
        SHOWMSG("didn't get the info");

        __set_errno(__translate_io_error_to_errno(IoErr()));
        goto out;
    }

    __convert_info_to_statfs(id,buf);

    result = OK;

 out:

    PROFILE_OFF();

    UnLock(lock);

    PROFILE_ON();

    RETURN(result);
    return(result);
}