nlsgetcall(3nsl) [x11r4 man page]

nlsgetcall(3NSL)				       Networking Services Library Functions					  nlsgetcall(3NSL)

NAME

       nlsgetcall - get client's data passed via the listener

SYNOPSIS

       #include <sys/tiuser.h>

       struct t_call *nlsgetcall(int fildes);

DESCRIPTION

       nlsgetcall() allows server processes started by the listener process to access the client's t_call structure, that is, the sndcall argument
       of t_connect(3NSL).

       The t_call structure returned by nlsgetcall() can be released using t_free(3NSL).

       nlsgetcall() returns the address of an allocated t_call structure or NULL if a t_call structure cannot be allocated. If the t_alloc()  suc-
       ceeds,  undefined environment variables are indicated by a negative len field in the appropriate netbuf structure.   A len field of zero in
       the netbuf structure is valid and means that the original buffer in the listener's t_call structure was NULL.

RETURN VALUES

       A NULL pointer is returned if a t_call structure cannot be allocated by t_alloc(). t_errno can be inspected for further error  information.
       Undefined environment variables are indicated by a negative length field (len) in the appropriate netbuf structure.

FILES

       /usr/lib/libnls.so.1    shared object

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       nlsadmin(1M), getenv(3C), t_alloc(3NSL), t_connect(3NSL), t_error(3NSL), t_free(3NSL), t_sync(3NSL), attributes(5)

WARNINGS

       The len field in the netbuf structure is defined as being unsigned. In order to check for error returns, it should first be cast to an int.

       The  listener process limits the amount of user data (udata) and options data (opt) to 128 bytes each.	Address data addr is limited to 64
       bytes. If the original data was longer,	no indication of overflow is given.

NOTES

       Server processes must call t_sync(3NSL) before calling this routine.

       This interface is unsafe in multithreaded applications.	Unsafe interfaces should be called only from the main thread.

SunOS 5.10							    14 Nov 2002 						  nlsgetcall(3NSL)

t_free(3NSL)					       Networking Services Library Functions					      t_free(3NSL)

NAME

       t_free - free a library structure

SYNOPSIS

       #include <xti.h>

       int t_free(void *ptr, int struct_type);

DESCRIPTION

       This  routine is part of the XTI interfaces which evolved from the TLI interfaces. XTI represents the future evolution of these interfaces.
       However, TLI interfaces are supported for compatibility. When using a TLI routine that has the same name as an XTI routine,  the   tiuser.h
       header file must be used.  Refer to the	TLI COMPATIBILITY section for a description of differences between the two interfaces.

       The  t_free()  function frees memory previously allocated by t_alloc(3NSL). This function will free memory for the specified structure, and
       will also free memory for buffers referenced by the structure.

       The argument ptr points to one of the seven structure types described for t_alloc(3NSL), and struct_type identifies the type of that struc-
       ture which must be one of the following:

	 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 transport functions.

       The  function 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 structure. If buf is a null pointer, 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(3NSL).

RETURN VALUES

       Upon successful completion, a value of  0 is returned.  Otherwise, a value of  -1 is returned and t_errno is set to indicate an error.

VALID STATES

       ALL - apart from T_UNINIT.

ERRORS

       On failure, t_errno is set to the following:

       TNOSTRUCTYPE    Unsupported struct_type requested.

       TPROTO	       This error indicates that a communication problem has been detected between XTI and the transport provider for which  there
		       is no other suitable XTI error (t_errno).

       TSYSERR	       A system error has occurred during execution of this function.

TLI COMPATIBILITY

       The  XTI  and  TLI interface definitions have common names but use different header files. This, and other semantic differences between the
       two interfaces are described in the subsections below.

   Interface Header
       The XTI interfaces use the header file, xti.h. TLI interfaces should not use this header.  They should use the header:

	 #include <tiuser.h>

   Error Description Values
       The t_errno value that can be set by the XTI interface and cannot be set by the TLI interface is:

       TPROTO

ATTRIBUTES

       See attributes(5)  for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       t_alloc(3NSL), attributes(5)

SunOS 5.11							    7 May 1998							      t_free(3NSL)