io_readlink()

int io_readlink ( resmgr_context_t *ctp,
                  io_readlink_t *msg,
                  RESMGR_HANDLE_T *handle,
                  void *reserved ) 

Classification: Connect

Default handler: none

Helper functions: iofunc_readlink()

Client function: readlink()

Messages: _IO_CONNECT with subtype _IO_CONNECT_READLINK

Data structure:

struct _io_connect {
  // internal fields (as described above)
  uint16_t path_len;
  uint8_t  extra_type;
  uint16_t extra_len;
  char     path [1];
};

struct _io_connect_link_reply {
  uint32_t reserved1;
  uint32_t file_type;
  uint8_t  eflag;
  uint8_t  reserved2[1];
  uint16_t chroot_len;
  uint32_t umask;
  uint16_t nentries;
  uint16_t path_len;
};

typedef union {
  struct _io_connect            connect;
  struct _io_connect_link_reply link_reply;
} io_open_t;

Description: Responsible for reading the contents of a symbolic link as specified by the path member of the input structure. The bytes returned are the contents of the symbolic link; the status returned is the number of bytes in the reply. A valid return should be done only for a symbolic link; all other accesses should return an error code.

Returns: The status via the helper macro _RESMGR_STATUS() and the data via message reply.