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; }; struct _io_connect_ftype_reply { uint16_t status; /* Typically an errno */ uint16_t reserved; uint32_t file_type; /* _FTYPE_? in sys/ftype.h */ }; typedef union { struct _io_connect connect; struct _io_connect_link_reply link_reply; struct _io_connect_ftype_reply ftype_reply; } io_readlink_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.