Unix/Linux Go Back    


NetBSD 6.1.5 - man page for getttynam (netbsd section 3)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


GETTTYENT(3)			   BSD Library Functions Manual 		     GETTTYENT(3)

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

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <ttyent.h>

     struct ttyent *
     getttyent();

     struct ttyent *
     getttynam(char *name);

     int
     setttyent(void);

     int
     setttyentpath(const char *path);

     int
     endttyent(void);

DESCRIPTION
     The getttyent(), and getttynam() functions each return a pointer to an object, with the fol-
     lowing 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 (dev. specific) */
     #define TTY_RTSCTS      0x08    /* set 'CRTSCTS' on open (dev. specific) */
     #define TTY_SOFTCAR     0x10    /* ignore hardware carrier (dev. spec.) */
     #define TTY_MDMBUF      0x20    /* set 'MDMBUF' on open (dev. specific) */
     #define TTY_DTRCTS      0x40    /* set 'CDTRCTS' on open (dev. specific) */
	     int     ty_status;      /* flag values */
	     char    *ty_window;     /* command for window manager */
	     char    *ty_comment;    /* comment field */
	     char    *ty_class;      /* category of tty usage */
     };

     The fields are as follows:

     ty_name	 The name of the character-special file.

     ty_getty	 The name of the command invoked by init(8) to initialize tty line characteris-
		 tics.

     ty_type	 The 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 default.

		 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, ignore hardware carrier
			      on the line.

     ty_window	 The 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.

     ty_class	 A key indexing into a termcap-style database (/etc/ttyclasses) of attributes for
		 this class of tty.  No attributes are currently defined or used, so there are
		 currently no functions to retrieve them.

     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 neces-
     sary.  The setttyent() function rewinds the file if open, or opens the file if it is
     unopened.	The setttyentpath() function is equivalent to setttyent() but accepts an addi-
     tional argument to read the ttys information from an alternate file instead of the default
     location (defined in _PATH_TTYS).	The endttyent() function closes any open files.

     The getttynam() function 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() and setttyentpath() functions and endttyent() return 0 on failure and 1 on suc-
     cess.

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 appeared in 4.3BSD.
     The setttyentpath() function appeared in NetBSD 4.0.

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.

BSD					  April 18, 2006				      BSD
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 04:50 AM.