ttyslot(3)ttyslot(3)NAMEttyslot - Find the slot for the current user in the user accounting
database
SYNOPSIS
#include <stdlib.h>
int ttyslot(
void );
LIBRARY
Standard C Library (libc)
STANDARDS
Interfaces documented on this reference page conform to industry stan‐
dards as follows:
ttyslot(): XSH4.2
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
DESCRIPTION
The ttyslot() function returns the index of the current user's entry in
the user accounting database. The current user's entry is an entry for
which the utline member matches the name of a terminal device associ‐
ated with any of the process' file descriptors 0, 1, or 2 (standard
input, standard output, or error output). The index is an ordinal num‐
ber representing the record number in the database of the current
user's entry. The first entry in the database is represented by the
return value 0 (zero).
NOTES
The ttyslot() function is scheduled to be withdrawn in a future version
of the X/Open CAE Specification.
[Tru64 UNIX] When compiled in the X/Open UNIX environment, calls to
the ttyslot() function are internally renamed by prepending _E to the
function name. When you are debugging a module that includes the ttys‐
lot() function and for which _XOPEN_SOURCE_EXTENDED has been defined,
use _Ettyslot to refer to the ttyslot() call. See standards(5) for
information on when the _XOPEN_SOURCE_EXTENDED macro is defined.
RETURN VALUES
Upon successful completion, the ttyslot() function returns the index of
the current user's entry in the user accounting database.
If an error is encountered while searching the database, or if none of
the file descriptors 0, 1, or 2 is associated with a terminal device,
-1 is returned.
The following behavior does not conform to the current standards, and
is supported only for backward compatibility.
[Tru64 UNIX] In applications that are compiled in an environment that
excludes the _XOPEN_SOURCE_EXTENDED standard definitions, the ttyslot()
function returns 0 (zero) on error.
SEE ALSO
Functions: getutxent(3), ttyname(3)
Standards: standards(5)ttyslot(3)
