GETTTYENT(3)               Linux Programmer's Manual              GETTTYENT(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).

       allbox;  lbw25  lb lb l l l.  Interface Attribute Value T{ getttyent(),
       setttyent(),  endttyent(),  getttynam()  T}   Thread  safety  MT-Unsafe
       race:ttyent

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 4.16 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)