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 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(), │ Thread safety │ MT-Unsafe race:ttyent │
       │ endttyent(), getttynam()  │               │                       │
       └───────────────────────────┴───────────────┴───────────────────────┘

CONFORMING TO

       Not in POSIX.1.  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)

COLOPHON

       This  page  is  part  of  release  5.10  of  the  Linux man-pages project.  A description of the project,
       information  about  reporting  bugs,  and  the  latest  version  of  this   page,   can   be   found   at
       https://www.kernel.org/doc/man-pages/.

GNU                                                2017-09-15                                       GETTTYENT(3)