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#include <errno.h>
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#include <errno.h>
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#include <atomic.h>
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#include <atomic.h>
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#include <stdlib.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdio.h>
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#include <assert.h>
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#include <sys/types.h>
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#include <sys/types.h>
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#include <libadt/hash_table.h>
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#include <libadt/hash_table.h>
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#include <as.h>
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#include <as.h>
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#define min(a, b)       ((a) < (b) ? (a) : (b))
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#define min(a, b)       ((a) < (b) ? (a) : (b))
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        ipc_answer_0(callid, EINVAL);  
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        ipc_answer_0(callid, EINVAL);  
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        ipc_answer_0(rid, EINVAL);
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        ipc_answer_0(rid, EINVAL);
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        return;
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        return;
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    }
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    }
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    size_t bytes;
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    if (dentry->type == TMPFS_FILE) {
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    size_t bytes = max(0, min(dentry->size - pos, len));
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        bytes = max(0, min(dentry->size - pos, len));
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    (void) ipc_data_read_finalize(callid, dentry->data + pos, bytes);
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        (void) ipc_data_read_finalize(callid, dentry->data + pos,
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            bytes);
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    } else {
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        int i;
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        tmpfs_dentry_t *cur = dentry->child;
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        assert(dentry->type == TMPFS_DIRECTORY);
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        /*
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         * Yes, we really use O(n) algorithm here.
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         * If it bothers someone, it could be fixed by introducing a
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         * hash table.
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         */
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        for (i = 0, cur = dentry->child; i < pos && cur; i++,
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            cur = cur->sibling)
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            ;
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        if (!cur) {
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            ipc_answer_0(callid, ENOENT);
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            ipc_answer_1(rid, ENOENT, 0);
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            return;
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        }
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        (void) ipc_data_read_finalize(callid, cur->name,
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            strlen(cur->name) + 1);
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        bytes = 1;
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    }
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    /*
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    /*
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     * Answer the VFS_READ call.
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     * Answer the VFS_READ call.
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     */
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     */
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    ipc_answer_1(rid, EOK, bytes);
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    ipc_answer_1(rid, EOK, bytes);