Annotation of gforth/engine/signals.c, revision 1.1
1.1 ! anton 1: /* signal handling
! 2:
! 3: Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
! 4:
! 5: This file is part of Gforth.
! 6:
! 7: Gforth is free software; you can redistribute it and/or
! 8: modify it under the terms of the GNU General Public License
! 9: as published by the Free Software Foundation; either version 2
! 10: of the License, or (at your option) any later version.
! 11:
! 12: This program is distributed in the hope that it will be useful,
! 13: but WITHOUT ANY WARRANTY; without even the implied warranty of
! 14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 15: GNU General Public License for more details.
! 16:
! 17: You should have received a copy of the GNU General Public License
! 18: along with this program; if not, write to the Free Software
! 19: Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
! 20:
! 21: */
! 22:
! 23:
! 24: #define _GNU_SOURCE
! 25:
! 26: #include <stdio.h>
! 27: #include <signal.h>
! 28: #include <setjmp.h>
! 29: #include <string.h>
! 30: #include <stdlib.h>
! 31: #if !defined(apollo) && !defined(MSDOS)
! 32: #include <sys/ioctl.h>
! 33: #endif
! 34: #include "config.h"
! 35: #include "forth.h"
! 36: #include "io.h"
! 37:
! 38:
! 39: #define DEFAULTCOLS 80
! 40: #if defined(MSDOS) || defined (_WIN32)
! 41: #define DEFAULTROWS 25
! 42: #else
! 43: #define DEFAULTROWS 24
! 44: #endif
! 45:
! 46: UCell cols=DEFAULTCOLS;
! 47: UCell rows=DEFAULTROWS;
! 48:
! 49:
! 50: static void
! 51: graceful_exit (int sig)
! 52: {
! 53: deprep_terminal();
! 54: fprintf (stderr, "\n\n%s.\n", strsignal (sig));
! 55: exit (0x80|sig);
! 56: }
! 57:
! 58: jmp_buf throw_jmp_buf;
! 59:
! 60: static void
! 61: signal_throw(int sig)
! 62: {
! 63: int code;
! 64: struct {
! 65: int signal;
! 66: int throwcode;
! 67: } *p, throwtable[] = {
! 68: { SIGINT, -28 },
! 69: { SIGFPE, -55 },
! 70: #ifdef SIGBUS
! 71: { SIGBUS, -23 },
! 72: #endif
! 73: { SIGSEGV, -9 },
! 74: };
! 75: signal(sig,signal_throw);
! 76: for (code=-256-sig, p=throwtable; p<throwtable+(sizeof(throwtable)/sizeof(*p)); p++)
! 77: if (sig == p->signal) {
! 78: code = p->throwcode;
! 79: break;
! 80: }
! 81: longjmp(throw_jmp_buf,code); /* or use siglongjmp ? */
! 82: }
! 83:
! 84: #ifdef SIGCONT
! 85: static void termprep (int sig)
! 86: {
! 87: signal(sig,termprep);
! 88: terminal_prepped=0;
! 89: }
! 90: #endif
! 91:
! 92: void get_winsize()
! 93: {
! 94: #ifdef TIOCGWINSZ
! 95: struct winsize size;
! 96:
! 97: if (ioctl (1, TIOCGWINSZ, (char *) &size) >= 0) {
! 98: rows = size.ws_row;
! 99: cols = size.ws_col;
! 100: }
! 101: #else
! 102: char *s;
! 103: if ((s=getenv("LINES"))) {
! 104: rows=atoi(s);
! 105: if (rows==0)
! 106: rows=DEFAULTROWS;
! 107: }
! 108: if ((s=getenv("COLUMNS"))) {
! 109: rows=atoi(s);
! 110: if (rows==0)
! 111: cols=DEFAULTCOLS;
! 112: }
! 113: #endif
! 114: }
! 115:
! 116: #ifdef SIGWINCH
! 117: static void change_winsize(int sig)
! 118: {
! 119: signal(sig,change_winsize);
! 120: #ifdef TIOCGWINSZ
! 121: get_winsize();
! 122: #endif
! 123: }
! 124: #endif
! 125:
! 126: void install_signal_handlers (void)
! 127: {
! 128:
! 129: #if 0
! 130: /* these signals are handled right by default, no need to handle them;
! 131: they are listed here just for fun */
! 132: static short sigs_to_default [] = {
! 133: #ifdef SIGCHLD
! 134: SIGCHLD,
! 135: #endif
! 136: #ifdef SIGINFO
! 137: SIGINFO,
! 138: #endif
! 139: #ifdef SIGIO
! 140: SIGIO,
! 141: #endif
! 142: #ifdef SIGLOST
! 143: SIGLOST,
! 144: #endif
! 145: #ifdef SIGKILL
! 146: SIGKILL,
! 147: #endif
! 148: #ifdef SIGSTOP
! 149: SIGSTOP,
! 150: #endif
! 151: #ifdef SIGPWR
! 152: SIGPWR,
! 153: #endif
! 154: #ifdef SIGMSG
! 155: SIGMSG,
! 156: #endif
! 157: #ifdef SIGDANGER
! 158: SIGDANGER,
! 159: #endif
! 160: #ifdef SIGMIGRATE
! 161: SIGMIGRATE,
! 162: #endif
! 163: #ifdef SIGPRE
! 164: SIGPRE,
! 165: #endif
! 166: #ifdef SIGVIRT
! 167: SIGVIRT,
! 168: #endif
! 169: #ifdef SIGGRANT
! 170: SIGGRANT,
! 171: #endif
! 172: #ifdef SIGRETRACT
! 173: SIGRETRACT,
! 174: #endif
! 175: #ifdef SIGSOUND
! 176: SIGSOUND,
! 177: #endif
! 178: #ifdef SIGSAK
! 179: SIGSAK,
! 180: #endif
! 181: #ifdef SIGTSTP
! 182: SIGTSTP,
! 183: #endif
! 184: #ifdef SIGTTIN
! 185: SIGTTIN,
! 186: #endif
! 187: #ifdef SIGTTOU
! 188: SIGTTOU,
! 189: #endif
! 190: #ifdef SIGSTKFLT
! 191: SIGSTKFLT,
! 192: #endif
! 193: #ifdef SIGUNUSED
! 194: SIGUNUSED,
! 195: #endif
! 196: };
! 197: #endif
! 198:
! 199: static short sigs_to_throw [] = {
! 200: #ifdef SIGBREAK
! 201: SIGBREAK,
! 202: #endif
! 203: #ifdef SIGINT
! 204: SIGINT,
! 205: #endif
! 206: #ifdef SIGILL
! 207: SIGILL,
! 208: #endif
! 209: #ifdef SIGEMT
! 210: SIGEMT,
! 211: #endif
! 212: #ifdef SIGFPE
! 213: SIGFPE,
! 214: #endif
! 215: #ifdef SIGIOT
! 216: SIGIOT,
! 217: #endif
! 218: #ifdef SIGSEGV
! 219: SIGSEGV,
! 220: #endif
! 221: #ifdef SIGALRM
! 222: SIGALRM,
! 223: #endif
! 224: #ifdef SIGPIPE
! 225: SIGPIPE,
! 226: #endif
! 227: #ifdef SIGPOLL
! 228: SIGPOLL,
! 229: #endif
! 230: #ifdef SIGPROF
! 231: SIGPROF,
! 232: #endif
! 233: #ifdef SIGBUS
! 234: SIGBUS,
! 235: #endif
! 236: #ifdef SIGSYS
! 237: SIGSYS,
! 238: #endif
! 239: #ifdef SIGTRAP
! 240: SIGTRAP,
! 241: #endif
! 242: #ifdef SIGURG
! 243: SIGURG,
! 244: #endif
! 245: #ifdef SIGUSR1
! 246: SIGUSR1,
! 247: #endif
! 248: #ifdef SIGUSR2
! 249: SIGUSR2,
! 250: #endif
! 251: #ifdef SIGVTALRM
! 252: SIGVTALRM,
! 253: #endif
! 254: #ifdef SIGXFSZ
! 255: SIGXFSZ,
! 256: #endif
! 257: };
! 258: static short sigs_to_quit [] = {
! 259: #ifdef SIGHUP
! 260: SIGHUP,
! 261: #endif
! 262: #ifdef SIGQUIT
! 263: SIGQUIT,
! 264: #endif
! 265: #ifdef SIGABRT
! 266: SIGABRT,
! 267: #endif
! 268: #ifdef SIGTERM
! 269: SIGTERM,
! 270: #endif
! 271: #ifdef SIGXCPU
! 272: SIGXCPU,
! 273: #endif
! 274: };
! 275: int i;
! 276:
! 277: #define DIM(X) (sizeof (X) / sizeof *(X))
! 278: /*
! 279: for (i = 0; i < DIM (sigs_to_ignore); i++)
! 280: signal (sigs_to_ignore [i], SIG_IGN);
! 281: */
! 282: for (i = 0; i < DIM (sigs_to_throw); i++)
! 283: signal (sigs_to_throw [i], die_on_signal ? graceful_exit : signal_throw);
! 284: for (i = 0; i < DIM (sigs_to_quit); i++)
! 285: signal (sigs_to_quit [i], graceful_exit);
! 286: #ifdef SIGCONT
! 287: signal (SIGCONT, termprep);
! 288: #endif
! 289: #ifdef SIGWINCH
! 290: signal (SIGWINCH, change_winsize);
! 291: #endif
! 292: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to signals.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [gforth] / gforth / engine