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setttyent(3)


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 4.09 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/.



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