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BSD 2.11 - man page for getttyent (bsd section 3)

GETTTYENT(3)				       Library Functions Manual 				 GETTTYENT(3)

getttyent, getttynam, setttyent, endttyent - get ttys file entry
#include <ttyent.h> struct ttyent *getttyent() struct ttyent *getttynam(name) char *name; setttyent() endttyent()
Getttyent, and getttynam each return a pointer to an object with the following structure containing the bro- ken-out fields of a line from the tty description file. /* * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)ttyent.h 8.1 (Berkeley) 6/2/93 */ #ifndef _TTYENT_H #define _TTYENT_H 1 #include <features.h> #define _PATH_TTYS "/etc/ttys" #define _TTYS_OFF "off" #define _TTYS_ON "on" #define _TTYS_SECURE "secure" #define _TTYS_WINDOW "window" struct ttyent { char *ty_name; /* terminal device name */ char *ty_getty; /* command to execute, usually getty */ char *ty_type; /* terminal type for termcap */ #define TTY_ON 0x01 /* enable logins (start ty_getty program) */ #define TTY_SECURE 0x02 /* allow uid of 0 to login */ int ty_status; /* status flags */ char *ty_window; /* command to start up window manager */ char *ty_comment; /* comment field */ }; __BEGIN_DECLS extern struct ttyent *getttyent (void) __THROW; extern struct ttyent *getttynam (const char *__tty) __THROW; extern int setttyent (void) __THROW; extern int endttyent (void) __THROW; __END_DECLS #endif /* ttyent.h */ ty_name is the name of the character-special file in the directory ``/dev". For various reasons, it must reside in the directory ``/dev". ty_getty is the command (usually getty(8)) which is invoked by init to initialize tty line characteris- tics. In fact, any arbitrary command can be used; a typical use is to initiate a terminal emula- tor in a window system. ty_type is the name of the default terminal type connected to this tty line. This is typically a name from the termcap(5) data base. The environment variable `TERM' is initialized with this name by getty(8) or login(1). ty_status is a mask of bit fields which indicate various actions to be allowed on this tty line. The fol- lowing is a description of each flag. TTY_ON Enables logins (i.e., init(8) will start the specified ``getty" command on this entry). TTY_SECURE Allows root to login on this terminal. Note that `TTY_ON' must be included for this to be useful. ty_window is the command to execute for a window system associated with the line. The window system will be started before the command specified in the ty_getty entry is executed. If none is specified, this will be null. ty_comment is the trailing comment field, if any; a leading delimiter and white space will be removed. Getttyent reads the next line from the ttys file, opening the file if necessary; setttyent rewinds the file; endttyent closes it. Getttynam searches from the beginning of the file until a matching name is found (or until EOF is encoun- tered).
login(1), ttyslot(3), ttys(5), gettytab(5), termcap(5), getty(8), init(8)
Null pointer (0) returned on EOF or error.
All information is contained in a static area so it must be copied if it is to be saved. 4.3 Berkeley Distribution May 20, 1986 GETTTYENT(3)

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