getttyent(3) - Linux manual page (original) (raw)

getttyent(3) Library Functions Manual getttyent(3)

NAME top

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

LIBRARY top

   Standard C library (_libc_, _-lc_)

SYNOPSIS top

   **#include <ttyent.h>**

   **struct ttyent *getttyent(void);**
   **struct ttyent *getttynam(const char ***_name_**);**

   **int setttyent(void);**
   **int endttyent(void);**

DESCRIPTION top

   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 */
       };

   _tystatus_ can be:

       #define TTY_ON     0x01  /* enable logins (start ty_getty program) */
       #define TTY_SECURE 0x02  /* allow UID 0 to login */

ATTRIBUTES top

   For an explanation of the terms used in this section, see
   [attributes(7)](../man7/attributes.7.html).
   ┌────────────────────────┬───────────────┬───────────────────────┐
   │ **Interface** │ **Attribute** │ **Value** │
   ├────────────────────────┼───────────────┼───────────────────────┤
   │ **getttyent**(),           │ Thread safety │ MT-Unsafe race:ttyent │
   │ **setttyent**(),           │               │                       │
   │ **endttyent**(),           │               │                       │
   │ **getttynam**()            │               │                       │
   └────────────────────────┴───────────────┴───────────────────────┘

STANDARDS top

   BSD.

NOTES top

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

SEE ALSO top

   [ttyname(3)](../man3/ttyname.3.html), [ttyslot(3)](../man3/ttyslot.3.html)

COLOPHON top

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Linux man-pages 6.10 2024-07-23 getttyent(3)

Pages that refer to this page:ttyslot(3)