| NAME | SYNOPSIS | DESCRIPTION | CONFORMING TO | NOTES | SEE ALSO | COLOPHON | The Linux Programming Interface |
GETTTYENT(3) Linux Programmer's Manual GETTTYENT(3)
getttyent, getttynam, setttyent, endttyent - get ttys file entry
#include <ttyent.h>
struct ttyent *getttyent(void);
struct ttyent *getttynam(const char *name);
int setttyent(void);
int endttyent(void);
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 ttyname 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 */
Not in POSIX.1-2001. Present on the BSDs, and perhaps other systems.
Under Linux the file /etc/ttys, and the functions described above, are not
used.
ttyname(3), ttyslot(3)
This page is part of release 3.32 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can be found
at http://www.kernel.org/doc/man-pages/.
GNU 2002-07-18 GETTTYENT(3)
HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface