pathops.c

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/*
 * Copyright (C) 2004-2007 by egnite Software GmbH. All rights reserved.
 *
 * Copyright (c) 1991
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders 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 EGNITE SOFTWARE GMBH 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 EGNITE
 * SOFTWARE GMBH 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.
 *
 * For additional information see http://www.ethernut.de/
 *
 */

// unix emulation requires unistd.h as first include
#include <unistd.h>

#include <errno.h>
#include <sys/device.h>
#include <string.h>

#include <fs/fs.h>
#include <sys/stat.h>


static int PathOperation(CONST char *path, int opcode)
{
    NUTDEVICE *dev;
    char dev_name[9];
    uint8_t nidx;
    CONST char *nptr = path;

    /*
     * Extract device name.
     */
    for (nidx = 0; *nptr && *nptr != ':' && nidx < 8; nidx++) {
        dev_name[nidx] = *nptr++;
    }
    dev_name[nidx] = 0;
    nptr++;

    /*
     * Get device structure of registered device. In later releases we
     * try to open a file on a root device.
     */
    if ((dev = NutDeviceLookup(dev_name)) == 0) {
        errno = ENOENT;
        return -1;
    }
    return (*dev->dev_ioctl) (dev, opcode, (void *) nptr);
}

int access(CONST char *path, int what)
{
    struct stat s;

    if (stat(path, &s)) {
        return -1;
    }
    return 0;
}

long lseek(int fh, long pos, int whence)
{
    //IOCTL_ARG3 args;

    //args.arg1 = (void *)fh;
    //args.arg2 = (void *)(unsigned int)pos;
    //args.arg3 = (void *)whence;
    //return (*dev->dev_ioctl) (dev, opcode, (void *)&args);
    return -1;
}

int rmdir(CONST char *path)
{
    return PathOperation(path, FS_DIR_REMOVE);
}

int unlink(CONST char *path)
{
    return PathOperation(path, FS_FILE_DELETE);
}


int stat(CONST char *path, struct stat *s)
{
    NUTDEVICE *dev;
    char dev_name[9];
    uint8_t nidx;
    CONST char *nptr = path;
    FSCP_STATUS parms;

    /* Extract the device name. */
    for (nidx = 0; *nptr && *nptr != ':' && nidx < 8; nidx++) {
        dev_name[nidx] = *nptr++;
    }
    dev_name[nidx] = 0;

    /* Get device structure of registered device. */
    if ((dev = NutDeviceLookup(dev_name)) != 0) {
        if (*nptr == ':') {
            nptr++;
        }
        parms.par_path = nptr;
        parms.par_stp = s;
        return (*dev->dev_ioctl) (dev, FS_STATUS, (void *) &parms);
    }
    return -1;
}

int fstat(int fh, struct stat *s)
{
    return -1;
}

int mkdir(CONST char *path, int mode)
{
    return PathOperation(path, FS_DIR_CREATE);
}

int rename(CONST char *old_name, CONST char *new_name)
{
    int rc = -1;
    NUTDEVICE *dev;
    char old_devname[9];
    char new_devname[9];
    uint8_t nidx;
    CONST char *nptr;
    FSCP_RENAME parms;   /* Structure used for renaming files. */

    /* Extract old file's device name. */
    nptr = old_name;
    for (nidx = 0; *nptr && *nptr != ':' && nidx < 8; nidx++, nptr++) {
        old_devname[nidx] = *nptr;
    }
    old_devname[nidx] = 0;

    /* Make sure a colon follows the device name. */
    if (*nptr++ == ':') {
        /* Assign the old file's name to the file rename structure. */
        parms.par_old = nptr;

        /* Extract new device name. */
        nptr = new_name;

        for (nidx = 0; *nptr && *nptr != ':' && nidx < 8; nidx++, nptr++) {
            new_devname[nidx] = *nptr;
        }
        new_devname[nidx] = 0;

        /* Make sure a colon follows the device name. */
        if (*nptr++ == ':') {
            /* Assign the new file's name to the file rename structure. */
            parms.par_new = nptr;

            /* Make sure both device names are the same. */
            if (strcmp(new_devname, old_devname) == 0) {
                /* Get device structure of registered device. */
                if ((dev = NutDeviceLookup(old_devname)) == 0) {
                    errno = ENOENT;
                } else {
                    rc = (*dev->dev_ioctl) (dev, FS_RENAME, (void *) &parms);
                }
            }
        }
    }
    return rc;
}