1 /* Header: /usr/src/games/warp/RCS/sig.c,v 1.1 87/07/03 01:47:11 games Exp */
2
3 /* Log: sig.c,v
4 * Revision 7.0.1.1a 87/07/03 01:47:11 games
5 * Changed sigsetmask to use sigmask instead of calculating it (incorrectly)
6 * by hand.
7 *
8 * Revision 7.0.1.1 86/12/12 17:02:44 lwall
9 * Baseline for net release.
10 *
11 * Revision 7.0 86/10/08 15:13:24 lwall
12 * Split into separate files. Added amoebas and pirates.
13 *
14 */
15
16 #include "EXTERN.h"
17 #include "warp.h"
18 #include "play.h"
19 #include "score.h"
20 #include "term.h"
21 #include "util.h"
22 #include "INTERN.h"
23 #include "sig.h"
24
25 void
sig_init(void)26 sig_init(void)
27 {
28 sigignore(SIGINT); /* for inquiry of existence via kill call */
29 #ifdef SIGTTOU
30 sigignore(SIGTTOU);
31 #endif
32
33 sigset(SIGHUP, sig_catcher);
34 if (!debugging) {
35 sigset(SIGQUIT, sig_catcher);
36 sigset(SIGILL, sig_catcher);
37 sigset(SIGFPE, sig_catcher);
38 #if 0
39 sigset(SIGBUS, sig_catcher);
40 sigset(SIGSEGV, sig_catcher);
41 #endif
42 sigset(SIGSYS, sig_catcher);
43 sigset(SIGTERM, sig_catcher);
44 }
45 #ifdef SIGXCPU
46 sigset(SIGXCPU, sig_catcher);
47 #endif
48 #ifdef SIGCONT
49 sigset(SIGCONT, cont_catcher);
50 #endif
51 #ifdef SIGTSTP
52 sigset(SIGTSTP, stop_catcher);
53 sigset(SIGSTOP, stop_catcher);
54 #endif
55 }
56
57 #ifdef SIGTSTP
58 void
cont_catcher(int x)59 cont_catcher(int x)
60 {
61 #ifndef lint
62 sigset(SIGCONT,cont_catcher);
63 #endif
64 savetty();
65 crmode();
66 raw();
67 noecho();
68 nonl();
69 }
70 #endif
71
72 void
mytstp(void)73 mytstp(void)
74 {
75 resetty();
76 #ifdef SIGTSTP
77 kill(0,SIGTSTP);
78 #else
79 if (fork())
80 wait(0);
81 else {
82 char *shell = getenv("SHELL");
83
84 setuid(getuid());
85 if (!*shell)
86 shell = "/bin/sh";
87 execl(shell,shell,0);
88 exit(1);
89 }
90 #endif
91 rewrite();
92 }
93
94 void /* very much void */
finalize(int status)95 finalize(int status)
96 {
97 if (bizarre)
98 resetty();
99 if (status < 0) {
100 chdir("/usr/tmp");
101 sigset(SIGILL,SIG_DFL);
102 abort();
103 }
104 exit(status);
105 }
106
107 /* come here on signal other than interrupt, stop, or cont */
108
109 void
sig_catcher(int signo)110 sig_catcher(int signo)
111 {
112 #ifdef VERBOSE
113 static const char *signame[] = {
114 "",
115 "HUP",
116 "INT",
117 "QUIT",
118 "ILL",
119 "TRAP",
120 "IOT",
121 "EMT",
122 "FPE",
123 "KILL",
124 "BUS",
125 "SEGV",
126 "SYS",
127 "PIPE",
128 "ALRM",
129 "TERM",
130 "???"
131 #ifdef SIGTSTP
132 ,"STOP",
133 "TSTP",
134 "CONT",
135 "CHLD",
136 "TTIN",
137 "TTOU",
138 "TINT",
139 "XCPU",
140 "XFSZ"
141 #ifdef SIGPROF
142 ,"VTALARM",
143 "PROF"
144 #endif
145 #endif
146 };
147 #endif
148
149 #ifdef SIGTTOU
150 #ifndef lint
151 sigignore(SIGTTOU);
152 #endif /* lint */
153 #endif
154 #ifdef DEBUGGING
155 if (debug) {
156 printf("\r\nSIG%s--game not saved in debug\r\n",signame[signo]);
157 finalize(-1);
158 }
159 #endif
160 panic++;
161 if (panic >= 2) {
162 if (panic >= 3)
163 abort();
164 chdir(SAVEDIR);
165 kill(0,SIGIOT);
166 }
167 (void) sigset(SIGILL,SIG_DFL);
168 if (signo == SIGHUP && (timer < 10 || didkill))
169 signo = SIGQUIT;
170 if (signo == SIGQUIT) { /* can't let them bomb out without penalty */
171 if (smarts < 20)
172 smarts += 4;
173 else if (smarts < 35)
174 smarts += 2;
175 else
176 smarts++;
177 totalscore -= possiblescore / 2;
178 }
179 save_game();
180 if (signo != SIGHUP && signo != SIGQUIT) {
181 #ifdef VERBOSE
182 IF(verbose)
183 printf("\r\nCaught %s%s--%s\r\n",
184 signo ? "a SIG" : "an internal error", signame[signo],
185 experimenting ? "game saved" : "bye bye");
186 ELSE
187 #endif
188 #ifdef TERSE
189 printf("\r\nsignal %d--bye bye\r\n",signo);
190 #endif
191 }
192 switch (signo) {
193 case SIGBUS:
194 case SIGILL:
195 case SIGSEGV:
196 finalize(-signo);
197 }
198 finalize(1); /* and blow up */
199 }
200
201 #ifdef SIGTSTP
202 /* come here on stop signal */
203
204 void
stop_catcher(int sig)205 stop_catcher(int sig)
206 {
207 if (!waiting) {
208 resetty(); /* this is the point of all this */
209 #ifdef DEBUGGING
210 if (debug)
211 write(2,"stop_catcher\r\n",13);
212 #endif
213 sigset(SIGTSTP,SIG_DFL); /* enable stop */
214 #ifdef BSD42
215 sigsetmask(sigblock(0L) & ~sigmask(SIGTSTP));
216 #endif
217 kill(0,SIGTSTP); /* and do the stop */
218 }
219 #ifndef lint
220 sigset(SIGTSTP,stop_catcher); /* unenable the stop */
221 #endif
222 }
223 #endif
224