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-.\" Copyright (c) 1989, 1991, 1993
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-.\"     @(#)getttyent.3	8.1 (Berkeley) 6/4/93
-.\" $FreeBSD: src/lib/libc/gen/getttyent.3,v 1.12 2001/10/01 16:08:51 ru Exp $
-.\"
-.Dd November 17, 1996
-.Dt GETTTYENT 3
-.Os
-.Sh NAME
-.Nm getttyent ,
-.Nm getttynam ,
-.Nm setttyent ,
-.Nm endttyent
-.Nd get ttys file entry
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In ttyent.h
-.Ft struct ttyent *
-.Fn getttyent void
-.Ft struct ttyent *
-.Fn getttynam "const char *name"
-.Ft int
-.Fn setttyent void
-.Ft int
-.Fn endttyent void
-.Sh DESCRIPTION
-The
-.Fn getttyent ,
-and
-.Fn 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.
-.Bd -literal
-struct ttyent {
-	char	*ty_name;	/* terminal device name */
-	char	*ty_getty;	/* command to execute, usually getty */
-	char	*ty_type;	/* terminal type for termcap */
-#define	TTY_ON		0x01	/* enable logins (start ty_getty program) */
-#define	TTY_SECURE	0x02	/* allow uid of 0 to login */
-#define	TTY_DIALUP	0x04	/* is a dialup tty */
-#define	TTY_NETWORK	0x08	/* is a network tty */
-	int	ty_status;	/* status flags */
-	char	*ty_window;	/* command to start up window manager */
-	char	*ty_comment;	/* comment field */
-	char	*ty_group;	/* tty group name */
-};
-.Ed
-.Pp
-The fields are as follows:
-.Bl -tag -width ty_comment
-.It Fa ty_name
-The name of the character-special file.
-.It Fa ty_getty
-The name of the command invoked 
-to initialize tty line characteristics.
-.It Fa ty_type
-The name of the default terminal type connected to this tty line.
-.It Fa ty_status
-A mask of bit fields which indicate various actions allowed on this
-tty line.
-The possible flags are as follows:
-.Bl -tag -width TTY_NETWORK
-.It Dv TTY_ON
-Enables logins
-.It Dv TTY_SECURE
-Allow users with a uid of 0 to login on this terminal.
-.It Dv TTY_DIALUP
-Identifies a tty as a dialin line.
-.It Dv TTY_NETWORK
-Identifies a tty used for network connections.
-.El
-.It Fa ty_window
-The command to execute for a window system associated with the line.
-.It Fa ty_group
-A group name to which the tty belongs.
-If no group is specified in the ttys description file,
-then the tty is placed in an anonymous group called "none".
-.It Fa ty_comment
-Any trailing comment field, with any leading hash marks (``#'') or
-whitespace removed.
-.El
-.Pp
-If any of the fields pointing to character strings are unspecified,
-they are returned as null pointers.
-The field
-.Fa ty_status
-will be zero if no flag values are specified.
-.Pp
-See
-.Xr ttys 5
-for a more complete discussion of the meaning and usage of the
-fields.
-.Pp
-The
-.Fn getttyent
-function
-reads the next line from the ttys file, opening the file if necessary.
-The
-.Fn setttyent
-function
-rewinds the file if open, or opens the file if it is unopened.
-The
-.Fn endttyent
-function
-closes any open files.
-.Pp
-The
-.Fn getttynam
-function
-searches from the beginning of the file until a matching
-.Fa name
-is found
-(or until
-.Dv EOF
-is encountered).
-.Sh RETURN VALUES
-The routines
-.Fn getttyent
-and
-.Fn getttynam
-return a null pointer on
-.Dv EOF
-or error.
-The
-.Fn setttyent
-function
-and
-.Fn endttyent
-return 0 on failure and 1 on success.
-.Sh FILES
-.Bl -tag -width /etc/ttys -compact
-.It Pa /etc/ttys
-.El
-.Sh SEE ALSO
-.Xr login 1 ,
-.Xr ttyslot 3 ,
-.Xr gettytab 5 ,
-.Xr termcap 5 ,
-.Xr ttys 5 ,
-.Xr getty 8 ,
-.Sh HISTORY
-The
-.Fn getttyent ,
-.Fn getttynam ,
-.Fn setttyent ,
-and
-.Fn endttyent
-functions appeared in
-.Bx 4.3 .
-.Sh 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.