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1.1 root 1: /* $Header: final.c,v 4.3 85/05/01 11:38:08 lwall Exp $
2: *
3: * $Log: final.c,v $
4: * Revision 4.3 85/05/01 11:38:08 lwall
5: * Baseline for release with 4.3bsd.
6: *
7: */
8:
9: #include "EXTERN.h"
10: #include "common.h"
11: #include "util.h"
12: #include "term.h"
13: #include "ng.h"
14: #include "init.h"
15: #include "bits.h"
16: #include "last.h"
17: #include "rcstuff.h"
18: #include "ngdata.h"
19: #include "INTERN.h"
20: #include "final.h"
21:
22: void
23: final_init()
24: {
25: #ifdef SIGTSTP
26: sigset(SIGTSTP, stop_catcher); /* job control signals */
27: sigset(SIGCONT, cont_catcher); /* job control signals */
28: #endif
29:
30: sigset(SIGINT, int_catcher); /* always catch interrupts */
31: sigset(SIGHUP, sig_catcher); /* and hangups */
32: #ifndef lint
33: sigignore(SIGEMT);
34: #endif lint
35:
36: sigset(SIGILL, sig_catcher);
37: sigset(SIGTRAP, sig_catcher);
38: sigset(SIGFPE, sig_catcher);
39: sigset(SIGBUS, sig_catcher);
40: sigset(SIGSEGV, sig_catcher);
41: sigset(SIGSYS, sig_catcher);
42: sigset(SIGTERM, sig_catcher);
43: #ifdef SIGXCPU
44: sigset(SIGXCPU, sig_catcher);
45: #endif
46: #ifdef SIGXFSZ
47: sigset(SIGXFSZ, sig_catcher);
48: #endif
49: }
50:
51: void /* very much void */
52: finalize(status)
53: int status;
54: {
55: if (bizarre)
56: resetty();
57: UNLINK(lockname);
58: #ifdef SERVER
59: UNLINK(active_name);
60: #endif
61: if (status < 0) {
62: chdir("/usr/tmp");
63: sigset(SIGILL,SIG_DFL);
64: abort();
65: }
66: exit(status);
67: }
68:
69: /* come here on interrupt */
70:
71: int
72: int_catcher()
73: {
74: sigset(SIGINT,int_catcher);
75: #ifdef DEBUGGING
76: if (debug)
77: write(2,"int_catcher\n",12);
78: #endif
79: if (!waiting) {
80: if (int_count) { /* was there already an interrupt? */
81: write(2,"\nBye-bye.\n",10);
82: sig_catcher(0); /* emulate the other signals */
83: }
84: int_count++;
85: }
86: }
87:
88: /* come here on signal other than interrupt, stop, or cont */
89:
90: int
91: sig_catcher(signo)
92: {
93: #ifdef VERBOSE
94: static char *signame[] = {
95: "",
96: "HUP",
97: "INT",
98: "QUIT",
99: "ILL",
100: "TRAP",
101: "IOT",
102: "EMT",
103: "FPE",
104: "KILL",
105: "BUS",
106: "SEGV",
107: "SYS",
108: "PIPE",
109: "ALRM",
110: "TERM",
111: "???"
112: #ifdef SIGTSTP
113: ,"STOP",
114: "TSTP",
115: "CONT",
116: "CHLD",
117: "TTIN",
118: "TTOU",
119: "TINT",
120: "XCPU",
121: "XFSZ"
122: #ifdef SIGPROF
123: ,"VTALARM",
124: "PROF"
125: #endif
126: #endif
127: };
128: #endif
129:
130: #ifdef SIGTTOU
131: #ifndef lint
132: sigignore(SIGTTOU);
133: #endif lint
134: #endif
135: #ifdef DEBUGGING
136: if (debug) {
137: printf("\nSIG%s--.newsrc not restored in debug\n",signame[signo]);
138: finalize(-1);
139: }
140: #endif
141: if (panic)
142: abort();
143: (void) sigset(SIGILL,SIG_DFL);
144: panic = TRUE; /* disable terminal I/O */
145: if (doing_ng) { /* need we reconstitute rc line? */
146: yankback();
147: restore_ng(); /* then do so (hope this works) */
148: }
149: doing_ng = FALSE;
150: if (rc_changed) /* need we write .newsrc out? */
151: write_rc(); /* then do so */
152: rc_changed = FALSE;
153: if (signo != SIGHUP)
154: #ifdef VERBOSE
155: IF(verbose)
156: printf("\nCaught %s%s--.newsrc restored\n",
157: signo ? "a SIG" : "an internal error", signame[signo]);
158: ELSE
159: #endif
160: #ifdef TERSE
161: printf("\nSignal %d--bye bye\n",signo);
162: #endif
163: switch (signo) {
164: case SIGBUS:
165: case SIGILL:
166: case SIGSEGV:
167: finalize(-signo);
168: }
169: finalize(1); /* and blow up */
170: }
171:
172: #ifdef SIGTSTP
173: /* come here on stop signal */
174:
175: int
176: stop_catcher()
177: {
178: if (!waiting) {
179: checkpoint_rc(); /* good chance of crash while stopped */
180: resetty(); /* this is the point of all this */
181: #ifdef DEBUGGING
182: if (debug)
183: write(2,"stop_catcher\n",13);
184: #endif
185: sigset(SIGTSTP,SIG_DFL); /* enable stop */
186: #ifdef BSD42
187: sigsetmask(sigblock(0) & ~(1 << (SIGTSTP-1)));
188: #endif
189: kill(0,SIGTSTP); /* and do the stop */
190: }
191: sigset(SIGTSTP,stop_catcher); /* unenable the stop */
192: }
193:
194: /* come here on cont signal */
195:
196: int
197: cont_catcher()
198: {
199: sigset(SIGCONT,cont_catcher);
200: savetty();
201: #ifdef MAILCALL;
202: mailcount = 0; /* force recheck */
203: #endif
204: if (!panic) {
205: if (!waiting) {
206: #ifdef DEBUGGING
207: if (debug)
208: write(2,"cont_catcher\n",13);
209: #endif
210: noecho(); /* set no echo */
211: crmode(); /* set cbreak mode */
212: forceme("\f"); /* cause a refresh */
213: /* (defined only if TIOCSTI defined) */
214: }
215: }
216: }
217: #endif
218:
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