Manpages - getttyent.3

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

  #include <ttyent.h>

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

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

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 */

For an explanation of the terms used in this section, see *attributes*(7).

Not in POSIX.1. Present on the BSDs, and perhaps other systems.

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

*ttyname*(3), *ttyslot*(3)

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