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

       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 │
       └───────────────────────────────────────────────────────────────┴───────────────┴───────────────────────┘

       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 */

       Standard C library (libc, -lc)

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

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

ttyname(3), ttyslot(3)

Linux man-pages 6.9.1                              2024-05-02                                       getttyent(3)

       BSD.

#include<ttyent.h>structttyent*getttyent(void);structttyent*getttynam(constchar*name);intsetttyent(void);intendttyent(void);