NAME

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

LIBRARY

       Standard C library (libc, -lc)

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 terminal name 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 */

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).
       ┌───────────────────────────────────────────────────────────────┬───────────────┬───────────────────────┐
       │ Interface                                                     │ Attribute     │ Value                 │
       ├───────────────────────────────────────────────────────────────┼───────────────┼───────────────────────┤
       │ getttyent(), setttyent(), endttyent(), getttynam()            │ Thread safety │ MT-Unsafe race:ttyent │
       └───────────────────────────────────────────────────────────────┴───────────────┴───────────────────────┘

STANDARDS

       BSD.

NOTES

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

SEE ALSO

       ttyname(3), ttyslot(3)

Linux man-pages 6.7                                2023-10-31                                       getttyent(3)