NLSGETCALL(3NSL)NLSGETCALL(3NSL)NAMEnlsgetcall - get client's data passed via the listener
SYNOPSIS
#include <sys/tiuser.h>
struct t_call *nlsgetcall(int fildes);
DESCRIPTIONnlsgetcall() 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 ALSOnlsadmin(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 inter‐
faces should be called only from the main thread.
Nov 14, 2002 NLSGETCALL(3NSL)
