wrapfs.fist

来自「Solaris操作系统下的过滤驱动程序, C源码程序.」· FIST 代码 · 共 70 行

%{

  /*
   * wrapfs: modifies file names and file data (same as base3fs)
   */

%}
debug on;
filter name;
filter data;
// dynamic_inode_numbers on;
// mntstyle attach;
// this is a FiST comment, not copied to output files
// wrapfs's smallest encoding/decoding unit is 1 byte (1 is default also)
//encoding_blocksize 1;
encoding_type none;
%%
%%


int
wrapfs_encode_block(const char *from, char *to, int len, const vnode_t *vp, const vfs_t *vfsp, u_long pagenum)
{
    fistMemCpy(to, from, len);
    return len;
}


int
wrapfs_decode_block(const char *from, char *to, int len, const vnode_t *vp, const vfs_t *vfsp, u_long pagenum)
{
    fistMemCpy(to, from, len);
    return len;
}


int
wrapfs_encode_filename(const char *name, int length, char **encoded_name, int skip_dots, const vnode_t *vp, const vfs_t *vfsp)
{
    int encoded_length;

    encoded_length = length + 1;
    *encoded_name = fistMalloc(encoded_length);
    fistMemCpy(*encoded_name, name, length);
    (*encoded_name)[length] = '\0';

    return encoded_length;
}


/* returns length of decoded string, or -1 if error */
int
wrapfs_decode_filename(const char *name, int length, char **decoded_name, int skip_dots, const vnode_t *vp, const vfs_t *vfsp)
{
    int error = 0;

    *decoded_name = fistMalloc(length);
    fistMemCpy(*decoded_name, name, length);
    error = length;

    return error;
}


/*
 * Local variables:
 * c-basic-offset: 4
 * End:
 */