d7a28702a3
time now. For whatever reason, the kernel seems to have generated SIGIOs previously without an initial fcntl(...,F_SETOWN), but does no longer. This caused window(1) to wait indefinitely for input. Also, undo rev 1.3 of wwspawn.c, it was not well-thought, and apparently not even tested at all. The blindly (even in a nonsensical place like the comment on top of the function) applied replacement of vfork() by fork() totally ignored that window(1) *does* abuse the feature of vfork() where a modification of the parent's address space is possible (in this case, to notify the parent of an erred exec*). Also, with vfork(), it is guaranteed that the parent is only woken up after the exec*() happened, where the replacement by fork() made the parent to almost always become runnable again before the child, in which case the parent simply told `subprocess died'. Unfortunately, working around _this_ seems to be a lot more of redesign work compared to little gained value, so i think relying on the specifics of vfork() is the simpler way. Submitted by: Philipp Mergenthaler <un1i@rz.uni-karlsruhe.de>
428 lines
9.7 KiB
C
428 lines
9.7 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Edward Wang at The University of California, Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)wwinit.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#include "ww.h"
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#include "tt.h"
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#include <signal.h>
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#include <fcntl.h>
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#include <termcap.h>
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#include "char.h"
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wwinit()
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{
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register i, j;
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char *kp;
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int s;
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wwdtablesize = getdtablesize();
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wwhead.ww_forw = &wwhead;
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wwhead.ww_back = &wwhead;
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s = sigblock(sigmask(SIGIO) | sigmask(SIGCHLD) | sigmask(SIGALRM) |
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sigmask(SIGHUP) | sigmask(SIGTERM));
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if (signal(SIGIO, wwrint) == BADSIG ||
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signal(SIGCHLD, wwchild) == BADSIG ||
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signal(SIGHUP, wwquit) == BADSIG ||
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signal(SIGTERM, wwquit) == BADSIG ||
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signal(SIGPIPE, SIG_IGN) == BADSIG) {
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wwerrno = WWE_SYS;
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return -1;
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}
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if (wwgettty(0, &wwoldtty) < 0)
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return -1;
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wwwintty = wwoldtty;
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#ifdef OLD_TTY
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wwwintty.ww_sgttyb.sg_flags &= ~XTABS;
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wwnewtty.ww_sgttyb = wwoldtty.ww_sgttyb;
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wwnewtty.ww_sgttyb.sg_erase = -1;
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wwnewtty.ww_sgttyb.sg_kill = -1;
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wwnewtty.ww_sgttyb.sg_flags |= CBREAK;
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wwnewtty.ww_sgttyb.sg_flags &= ~(ECHO|CRMOD);
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wwnewtty.ww_tchars.t_intrc = -1;
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wwnewtty.ww_tchars.t_quitc = -1;
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wwnewtty.ww_tchars.t_startc = -1;
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wwnewtty.ww_tchars.t_stopc = -1;
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wwnewtty.ww_tchars.t_eofc = -1;
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wwnewtty.ww_tchars.t_brkc = -1;
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wwnewtty.ww_ltchars.t_suspc = -1;
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wwnewtty.ww_ltchars.t_dsuspc = -1;
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wwnewtty.ww_ltchars.t_rprntc = -1;
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wwnewtty.ww_ltchars.t_flushc = -1;
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wwnewtty.ww_ltchars.t_werasc = -1;
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wwnewtty.ww_ltchars.t_lnextc = -1;
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wwnewtty.ww_lmode = wwoldtty.ww_lmode | LLITOUT;
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wwnewtty.ww_ldisc = wwoldtty.ww_ldisc;
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#else
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#ifndef OXTABS
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#define OXTABS XTABS
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#endif
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#ifndef _POSIX_VDISABLE
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#define _POSIX_VDISABLE -1
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#endif
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wwwintty.ww_termios.c_oflag &= ~OXTABS;
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wwnewtty.ww_termios = wwoldtty.ww_termios;
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wwnewtty.ww_termios.c_iflag &=
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~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXOFF | IMAXBEL);
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wwnewtty.ww_termios.c_oflag = 0;
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wwnewtty.ww_termios.c_cflag &= ~(CSIZE | PARENB);
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wwnewtty.ww_termios.c_cflag |= CS8;
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wwnewtty.ww_termios.c_lflag = 0;
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for (i = 0; i < NCCS; i++)
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wwnewtty.ww_termios.c_cc[i] = _POSIX_VDISABLE;
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wwnewtty.ww_termios.c_cc[VMIN] = 0;
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wwnewtty.ww_termios.c_cc[VTIME] = 0;
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#endif
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wwnewtty.ww_fflags = wwoldtty.ww_fflags | FASYNC;
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if (wwsettty(0, &wwnewtty) < 0)
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goto bad;
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if ((wwterm = getenv("TERM")) == 0) {
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wwerrno = WWE_BADTERM;
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goto bad;
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}
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if (tgetent(wwtermcap, wwterm) != 1) {
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wwerrno = WWE_BADTERM;
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goto bad;
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}
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#ifdef OLD_TTY
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ospeed = wwoldtty.ww_sgttyb.sg_ospeed;
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switch (ospeed) {
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default:
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case B0:
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goto bad;
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case B50:
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wwbaud = 50;
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break;
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case B75:
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wwbaud = 75;
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break;
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case B110:
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wwbaud = 110;
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break;
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case B134:
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wwbaud = 134;
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break;
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case B150:
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wwbaud = 150;
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break;
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case B200:
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wwbaud = 200;
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break;
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case B300:
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wwbaud = 300;
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break;
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case B600:
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wwbaud = 600;
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break;
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case B1200:
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wwbaud = 1200;
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break;
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case B1800:
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wwbaud = 1800;
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break;
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case B2400:
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wwbaud = 2400;
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break;
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case B4800:
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wwbaud = 4800;
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break;
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case B9600:
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wwbaud = 9600;
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break;
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#ifdef B19200
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case B19200:
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#else
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case EXTA:
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#endif
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wwbaud = 19200;
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break;
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#ifdef B38400
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case B38400:
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#else
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case EXTB:
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#endif
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wwbaud = 38400;
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break;
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#ifdef B57600
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case B57600:
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wwbaud = 57600;
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break;
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#endif
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#ifdef B115200
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case B115200:
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wwbaud = 115200;
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break;
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#endif
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}
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#else
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if ((wwbaud = cfgetospeed(&wwoldtty.ww_termios)) == B0)
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goto bad;
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#endif
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wwospeed = ospeed;
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if (xxinit() < 0)
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goto bad;
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wwnrow = tt.tt_nrow;
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wwncol = tt.tt_ncol;
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wwavailmodes = tt.tt_availmodes;
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wwwrap = tt.tt_wrap;
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if (wwavailmodes & WWM_REV)
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wwcursormodes = WWM_REV | wwavailmodes & WWM_BLK;
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else if (wwavailmodes & WWM_UL)
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wwcursormodes = WWM_UL;
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if ((wwib = malloc((unsigned) 512)) == 0)
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goto bad;
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wwibe = wwib + 512;
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wwibq = wwibp = wwib;
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if ((wwsmap = wwalloc(0, 0, wwnrow, wwncol, sizeof (char))) == 0)
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goto bad;
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for (i = 0; i < wwnrow; i++)
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for (j = 0; j < wwncol; j++)
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wwsmap[i][j] = WWX_NOBODY;
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wwos = (union ww_char **)
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wwalloc(0, 0, wwnrow, wwncol, sizeof (union ww_char));
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if (wwos == 0)
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goto bad;
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/* wwos is cleared in wwstart1() */
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wwns = (union ww_char **)
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wwalloc(0, 0, wwnrow, wwncol, sizeof (union ww_char));
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if (wwns == 0)
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goto bad;
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for (i = 0; i < wwnrow; i++)
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for (j = 0; j < wwncol; j++)
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wwns[i][j].c_w = ' ';
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if (tt.tt_checkpoint) {
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/* wwcs is also cleared in wwstart1() */
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wwcs = (union ww_char **)
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wwalloc(0, 0, wwnrow, wwncol, sizeof (union ww_char));
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if (wwcs == 0)
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goto bad;
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}
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wwtouched = malloc((unsigned) wwnrow);
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if (wwtouched == 0) {
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wwerrno = WWE_NOMEM;
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goto bad;
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}
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for (i = 0; i < wwnrow; i++)
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wwtouched[i] = 0;
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wwupd = (struct ww_update *) malloc((unsigned) wwnrow * sizeof *wwupd);
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if (wwupd == 0) {
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wwerrno = WWE_NOMEM;
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goto bad;
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}
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wwindex[WWX_NOBODY] = &wwnobody;
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wwnobody.ww_order = NWW;
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kp = wwwintermcap;
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if (wwavailmodes & WWM_REV)
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wwaddcap1(WWT_REV, &kp);
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if (wwavailmodes & WWM_BLK)
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wwaddcap1(WWT_BLK, &kp);
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if (wwavailmodes & WWM_UL)
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wwaddcap1(WWT_UL, &kp);
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if (wwavailmodes & WWM_GRP)
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wwaddcap1(WWT_GRP, &kp);
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if (wwavailmodes & WWM_DIM)
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wwaddcap1(WWT_DIM, &kp);
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if (wwavailmodes & WWM_USR)
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wwaddcap1(WWT_USR, &kp);
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if (tt.tt_insline && tt.tt_delline || tt.tt_setscroll)
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wwaddcap1(WWT_ALDL, &kp);
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if (tt.tt_inschar)
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wwaddcap1(WWT_IMEI, &kp);
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if (tt.tt_insspace)
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wwaddcap1(WWT_IC, &kp);
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if (tt.tt_delchar)
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wwaddcap1(WWT_DC, &kp);
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wwaddcap("kb", &kp);
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wwaddcap2("ku", &kp);
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wwaddcap2("kd", &kp);
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wwaddcap2("kl", &kp);
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wwaddcap2("kr", &kp);
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wwaddcap("kh", &kp);
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if ((j = tgetnum("kn")) >= 0) {
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char cap[32];
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(void) sprintf(kp, "kn#%d:", j);
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for (; *kp; kp++)
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;
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for (i = 1; i <= j; i++) {
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(void) sprintf(cap, "k%d", i);
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wwaddcap(cap, &kp);
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cap[0] = 'l';
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wwaddcap(cap, &kp);
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}
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}
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/*
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* It's ok to do this here even if setenv() is destructive
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* since tt_init() has already made its own copy of it and
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* wwterm now points to the copy.
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*/
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(void) setenv("TERM", WWT_TERM, 1);
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#ifdef TERMINFO
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if (wwterminfoinit() < 0)
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goto bad;
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#endif
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if (tt.tt_checkpoint)
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if (signal(SIGALRM, wwalarm) == BADSIG) {
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wwerrno = WWE_SYS;
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goto bad;
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}
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fcntl(0,F_SETOWN,getpid());
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/* catch typeahead before ASYNC was set */
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(void) kill(getpid(), SIGIO);
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wwstart1();
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(void) sigsetmask(s);
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return 0;
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bad:
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/*
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* Don't bother to free storage. We're supposed
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* to exit when wwinit fails anyway.
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*/
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(void) signal(SIGIO, SIG_DFL);
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(void) wwsettty(0, &wwoldtty);
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(void) sigsetmask(s);
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return -1;
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}
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wwaddcap(cap, kp)
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register char *cap;
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register char **kp;
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{
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char tbuf[512];
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char *tp = tbuf;
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register char *str, *p;
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if ((str = tgetstr(cap, &tp)) != 0) {
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while (*(*kp)++ = *cap++)
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;
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(*kp)[-1] = '=';
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while (*str) {
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for (p = unctrl(*str++); *(*kp)++ = *p++;)
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;
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(*kp)--;
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}
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*(*kp)++ = ':';
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**kp = 0;
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}
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}
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wwaddcap1(cap, kp)
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register char *cap;
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register char **kp;
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{
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while (*(*kp)++ = *cap++)
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;
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(*kp)--;
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}
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wwaddcap2(cap, kp)
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register char *cap;
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register char **kp;
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{
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char tbuf[512];
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char *tp = tbuf;
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register char *str, *p;
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if ((str = tgetstr(cap, &tp)) != 0) {
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/* we don't support vt100's application key mode, remap */
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if (str[0] == ctrl('[') && str[1] == 'O')
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str[1] = '[';
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while (*(*kp)++ = *cap++)
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;
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(*kp)[-1] = '=';
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while (*str) {
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for (p = unctrl(*str++); *(*kp)++ = *p++;)
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;
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(*kp)--;
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}
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*(*kp)++ = ':';
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**kp = 0;
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}
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}
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wwstart()
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{
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register i;
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(void) wwsettty(0, &wwnewtty);
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signal(SIGIO, wwrint);
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for (i = 0; i < wwnrow; i++)
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wwtouched[i] = WWU_TOUCHED;
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wwstart1();
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}
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wwstart1()
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{
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register i, j;
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for (i = 0; i < wwnrow; i++)
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for (j = 0; j < wwncol; j++) {
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wwos[i][j].c_w = ' ';
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if (tt.tt_checkpoint)
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wwcs[i][j].c_w = ' ';
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}
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xxstart();
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if (tt.tt_checkpoint)
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wwdocheckpoint = 1;
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}
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/*
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* Reset data structures and terminal from an unknown state.
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* Restoring wwos has been taken care of elsewhere.
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*/
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wwreset()
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{
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register i;
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xxreset();
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for (i = 0; i < wwnrow; i++)
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wwtouched[i] = WWU_TOUCHED;
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}
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