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