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)


   Copyright 2002 walter harms (walter.harms@informatik.uni-oldenburg.de)
 Distributed under GPL