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

#include <ttyent.h> struct ttyent *getttyent(void); I struct ttyent *getttynam(const char * name ); int setttyent(void); int endttyent(void);

These functions provide an interface to the file _PATH_TTYS (e.g., R /etc/ttys ). The function R setttyent () opens the file or rewinds it if already open. The function R endttyent () closes the file. The function R getttynam () searches for a given ttyname in the file. It returns a pointer to a struct ttyent (description below). The function R 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 */

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

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

ttyname(3), ttyslot(3)