diff options
Diffstat (limited to 'usr/src/lib/libcurses/screen/cbreak.c')
| -rw-r--r-- | usr/src/lib/libcurses/screen/cbreak.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/usr/src/lib/libcurses/screen/cbreak.c b/usr/src/lib/libcurses/screen/cbreak.c new file mode 100644 index 0000000000..dce15a57c6 --- /dev/null +++ b/usr/src/lib/libcurses/screen/cbreak.c @@ -0,0 +1,107 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 1997 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +/* Copyright (c) 1988 AT&T */ +/* All Rights Reserved */ + +/* + * University Copyright- Copyright (c) 1982, 1986, 1988 + * The Regents of the University of California + * All Rights Reserved + * + * University Acknowledgment- Portions of this document are derived from + * software developed by the University of California, Berkeley, and its + * contributors. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +/*LINTLIBRARY*/ + +/* + * Routines to deal with setting and resetting modes in the tty driver. + * See also setupterm.c in the termlib part. + */ +#include <sys/types.h> +#include "curses_inc.h" + +int +cbreak(void) +{ + /* + * This optimization is here because till SVR3.1 curses did not come up + * in cbreak mode and now it does. Therefore, most programs when they + * call cbreak won't pay for it since we'll know we're in the right + * mode. + */ + + if (cur_term->_fl_rawmode != 1) { +#ifdef SYSV + /* + * You might ask why ICRNL has anything to do with cbreak. + * The problem is that there are function keys that send + * a carriage return (some hp's). Curses cannot virtualize + * these function keys if CR is being mapped to a NL. Sooo, + * when we start a program up we unmap those but if you are + * in nocbreak then we map them back. The reason for that is that + * if a getch or getstr is done and you are in nocbreak the tty + * driver won't return until it sees a new line and since we've + * turned it off any program that has nl() and nocbreak() would + * force the user to type a NL. The problem with the function keys + * only gets solved if you are in cbreak mode which is OK + * since program taking action on a function key is probably + * in cbreak because who would expect someone to press a function + * key and then return ????? + */ + + PROGTTYS.c_iflag &= ~ICRNL; + PROGTTYS.c_lflag &= ~ICANON; + PROGTTYS.c_cc[VMIN] = 1; + PROGTTYS.c_cc[VTIME] = 0; +#else + PROGTTY.sg_flags |= (CBREAK | CRMOD); +#endif + +#ifdef DEBUG +#ifdef SYSV + if (outf) + fprintf(outf, "cbreak(), file %x, flags %x\n", + cur_term->Filedes, PROGTTYS.c_lflag); +#else + if (outf) + fprintf(outf, "cbreak(), file %x, flags %x\n", + cur_term->Filedes, PROGTTY.sg_flags); +#endif +#endif + cur_term->_fl_rawmode = 1; + cur_term->_delay = -1; + (void) reset_prog_mode(); +#ifdef FIONREAD + cur_term->timeout = 0; +#endif /* FIONREAD */ + } + return (OK); +} |