getttyent man page on MirBSD

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GETTTYENT(3)		   BSD 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
     The getttyent() and getttynam() functions each return a pointer to an ob-
     ject, with the following structure, containing the broken-out fields of a
     line from the tty description file.

	   struct ttyent {
		   char	   *ty_name;	   /* terminal device name */
		   char	   *ty_getty;	   /* command to execute */
		   char	   *ty_type;	   /* terminal type */
	   #define TTY_ON	   0x01	   /* enable logins */
	   #define TTY_SECURE	   0x02	   /* allow uid of 0 to login */
	   #define TTY_LOCAL	   0x04	   /* set 'CLOCAL' on open */
	   #define TTY_RTSCTS	   0x08	   /* set 'CRTSCTS' on open */
	   #define TTY_SOFTCAR	   0x10	   /* ignore hardware carrier */
	   #define TTY_MDMBUF	   0x20	   /* set 'MDMBUF' on open */
		   int	   ty_status;	   /* flag values */
		   char	   *ty_window;	   /* command for window manager */
		   char	   *ty_comment;	   /* comment field */
	   };

     The fields are as follows:

     ty_name	 Name of the character-special file.

     ty_getty	 Name of the command invoked by init(8) to initialize tty line
		 characteristics.

     ty_type	 Name of the default terminal type connected to this tty line.

     ty_status	 A mask of bit fields which indicate various actions allowed
		 on this tty line. The possible flags are as follows:

		 TTY_ON	      Enables logins (i.e., init(8) will start the
			      command referenced by ty_getty on this entry).

		 TTY_SECURE   Allow users with a UID of 0 to login on this
			      terminal.

		 TTY_LOCAL    If the terminal port's driver supports it, cause
			      the line to be treated as "local".

		 TTY_MDMBUF   If the terminal port's driver supports it, use
			      DTR/DCD hardware flow control on the line by de-
			      fault.

		 TTY_RTSCTS   If the terminal port's driver supports it, use
			      full-duplex RTS/CTS hardware flow control on the
			      line by default.

		 TTY_SOFTCAR  If the terminal port's driver supports it, ig-
			      nore hardware carrier on the line.

     ty_window	 Command to execute for a window system associated with the
		 line.

     ty_comment	 Any trailing comment field, with any leading hash marks ('#')
		 or whitespace removed.

     If any of the fields pointing to character strings are unspecified, they
     are returned as null pointers. The field ty_status will be zero if no
     flag values are specified.

     See ttys(5) for a more complete discussion of the meaning and usage of
     the fields.

     The getttyent() function reads the next line from the ttys file, opening
     the file if necessary. setttyent() rewinds the file if open, or opens the
     file if it is unopened. endttyent() closes any open files.

     getttynam() searches from the beginning of the file until a matching name
     is found (or until EOF is encountered).

RETURN VALUES
     The routines getttyent() and getttynam() return a null pointer on EOF or
     error. The setttyent() function and endttyent() return 0 on failure or 1
     on success.

FILES
     /etc/ttys

SEE ALSO
     login(1), ttyslot(3), gettytab(5), termcap(5), ttys(5), getty(8),
     init(8), ttyflags(8)

HISTORY
     The getttyent(), getttynam(), setttyent(), and endttyent() functions ap-
     peared in 4.3BSD.

BUGS
     These functions use static data storage; if the data is needed for future
     use, it should be copied before any subsequent calls overwrite it.

MirOS BSD #10-current		 June 4, 1993				     1
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