struct ttyent *
getttyent()
struct ttyent *
getttynam(char *name)
int
setttyent(void)
int
setttyentpath(const char *path)
int
endttyent(void)
),
and
getttynam()
functions
each return a pointer to an object, with the following structure,
containing the broken-out fields of a line from the tty description
file.
struct ttyent {
char *ty_name; /* terminal device name */
char *ty_getty; /* command to execute */
char *ty_type; /* terminal type */
#define TTY_ON 0x01 /* enable logins */
#define TTY_SECURE 0x02 /* allow uid of 0 to login */
#define TTY_LOCAL 0x04 /* set 'CLOCAL' on open (dev. specific) */
#define TTY_RTSCTS 0x08 /* set 'CRTSCTS' on open (dev. specific) */
#define TTY_SOFTCAR 0x10 /* ignore hardware carrier (dev. spec.) */
#define TTY_MDMBUF 0x20 /* set 'MDMBUF' on open (dev. specific) */
#define TTY_DTRCTS 0x40 /* set 'CDTRCTS' on open (dev. specific) */
int ty_status; /* flag values */
char *ty_window; /* command for window manager */
char *ty_comment; /* comment field */
char *ty_class; /* category of tty usage */
};
The fields are as follows:
ty_namety_gettyty_typety_statusTTY_ONty_getty
on this entry).
TTY_SECURETTY_LOCALTTY_MDMBUFTTY_RTSCTSTTY_SOFTCARty_windowty_commentty_class
If any of the fields pointing to character strings are unspecified,
they are returned as null pointers.
The field
ty_status
will be zero if no flag values are specified.
See ttys(5) for a more complete discussion of the meaning and usage of the fields.
The
getttyent()
function
reads the next line from the ttys file, opening the file if necessary.
The
setttyent()
function
rewinds the file if open, or opens the file if it is unopened.
The
setttyentpath()
function
is equivalent to
setttyent()
but accepts an additional argument to read the ttys information from
an alternate file instead of the default location
(defined in _PATH_TTYS).
The
endttyent()
function
closes any open files.
The
getttynam()
function
searches from the beginning of the file until a matching
name
is found
(or until
EOF
is encountered).
)
and
getttynam()
return a null pointer on
EOF
or error.
The
setttyent()
and
setttyentpath()
functions
and
endttyent()
return 0 on failure and 1 on success.
/etc/ttys),
getttynam(),
setttyent(),
and
endttyent()
functions appeared in
4.3BSD.
The
setttyentpath()
function appeared in
NetBSD4.0.