t_free - free a library structure
int t_free(ptr, struct_type)
The t_free function frees memory previously allocated by t_alloc. This
function will free memory for the specified structure, and will also free
memory for buffers referenced by the structure.
ptr points to one of the six structure types described for t_alloc, and
struct_type identifies the type of that structure, which can be one of
T_BIND struct t_bind
T_CALL struct t_call
T_OPTMGMT struct t_optmgmt
T_DIS struct t_discon
T_UNITDATA struct t_unitdata
T_UDERROR struct t_uderr
T_INFO struct t_info
where each of these structures is used as an argument to one or more
t_free will check the addr, opt, and udata fields of the given structure
(as appropriate), and free the buffers pointed to by the buf field of the
netbuf [see intro(3N)] structure. If buf is NULL, t_free will not
attempt to free memory. After all buffers are freed, t_free will free
the memory associated with the structure pointed to by ptr.
Undefined results will occur if ptr or any of the buf pointers points to
a block of memory that was not previously allocated by t_alloc.
This function resides within both the X/Open compliant libxnet and the
SVR4 compliant libnsl Network Services libraries. Network Services
applications which require X/Open compliance must link-load with -lxnet.
Network Services applications which require SVR4 compliance must linkload
On failure, t_errno may be set to the following:
TSYSERR A system error has occurred during execution of this
TNOSTRUCTYPE If _XOPEN_SOURCE is defined, then this t_errno value is
returned when an unsupported struct_type is requested.
t_free returns 0 on success and -1 on failure and t_errno is set to
indicate the error.
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