GETTTYENT(3) MachTen Programmer’s Manual GETTTYENT(3)

NAME
getttyent, getttynam, setttyent, endttyent - get ttys file entry

SYNOPSIS
#include <ttyent.h>

struct ttyent *
getttyent()

struct ttyent *
getttynam(char *name)

int
setttyent(void)

int
endttyent(void)

DESCRIPTION
The getttyent(), 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 */
int ty_status; /* flag values */
char *ty_window; /* command for window manager */
char *ty_comment; /* comment field */
};

The fields are as follows:

ty_name The name of the character-special file.

ty_getty The name of the command invoked by init(8) to initialize tty
line characteristics.

ty_type The name of the default terminal type connected to this tty
line.

ty_status A mask of bit fields which indicate various actions allowed
on this tty line. The possible flags are as follows:

TTY_ON Enables logins (i.e., init(8) will start the com-
mand referenced by ty_getty on this entry).

TTY_SECURE Allow users with a uid of 0 to login on this ter-
minal.

ty_window The command to execute for a window system associated with
the line.

ty_comment Any trailing comment field, with any leading hash marks
(‘‘#’’) or whitespace removed.

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 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).

RETURN VALUES
The routines getttyent() and getttynam() return a null pointer on EOF or
error. The setttyent() function and endttyent() return 0 on failure and
1 on success.

FILES
/etc/ttys

SEE ALSO
login(1), ttyslot(3), gettytab(5), termcap(5), ttys(5), getty(8),
init(8)

HISTORY
The getttyent(), getttynam(), setttyent(), and endttyent() functions ap-
peared in 4.3BSD.

BUGS
These functions use static data storage; if the data is needed for future
use, it should be copied before any subsequent calls overwrite it.

4.3 Berkeley Distribution June 4, 1993 2