getttyent(3) — Linux manual pages

Linux manual pages	Section 3

Name

getttyent, getttynam, setttyent, endttyent — get ttys file entry

Synopsis

#include <ttyent.h>

struct ttyent *getttyent( void);

struct ttyent *getttynam( const char *name);

int setttyent( void);

int endttyent( void);

DESCRIPTION

These functions provide an interface to the file _PATH_TTYS (e.g., /etc/ttys).

The function setttyent() opens the file or rewinds it if already open.

The function endttyent() closes the file.

The function getttynam() searches for a given terminal name in the file. It returns a pointer to a ttyent structure (description below).

The function getttyent() opens the file _PATH_TTYS (if necessary) and returns the first entry. If the file is already open, the next entry. The ttyent structure has the form:

struct ttyent {

char * ty_name;
/* terminal device name */

char * ty_getty;
/* command to execute, usually getty */

char * ty_type;
/* terminal type for termcap */

int ty_status;
/* status flags */

char * ty_window;
/* command to start up window manager */

char * ty_comment;
/* comment field */

};

ty_status can be:

#define TTY_ON     0x01  /* enable logins (start ty_getty program) */
#define TTY_SECURE 0x02  /* allow UID 0 to login */

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

Interface	Attribute	Value
`getttyent`(), `setttyent`(), `endttyent`(), `getttynam`()	Thread safety	MT-Unsafe race:ttyent

CONFORMING TO

Not in POSIX.1. Present on the BSDs, and perhaps other systems.

NOTES

Under Linux, the file /etc/ttys, and the functions described above, are not used.

COLOPHON

This page is part of release 5.11 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man−pages/.

Copyright 2002 walter harms (walter.harmsinformatik.uni-oldenburg.de)

%%%LICENSE_START(GPL_NOVERSION_ONELINE)
Distributed under GPL
%%%LICENSE_END

struct	ttyent {
	char	*	`ty_name`;	/* terminal device name */
	char	*	`ty_getty`;	/* command to execute, usually getty */
	char	*	`ty_type`;	/* terminal type for termcap */
	int		`ty_status`;	/* status flags */
	char	*	`ty_window`;	/* command to start up window manager */
	char	*	`ty_comment`;	/* comment field */
};