GETTTYENT(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 ttyname in the file. It returns a pointer to a struct ttyent (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
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 */

CONFORMING TO
Not in POSIX.1-2001. Present on the BSDs, and perhaps other systems.

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

SEE ALSO
ttyname(3), ttyslot(3)