getttynam(3) -- Linux man page



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 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 */


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


ttyname(3), ttyslot(3)