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0007-signal.c - scc - simple c99 compiler
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0007-signal.c (3206B)
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1 #include <assert.h>
2 #include <setjmp.h>
3 #include <signal.h>
4 #include <stdio.h>
5
6 sig_atomic_t abrt, fpe, iint, segv, term, def;
7 jmp_buf recover;
8
9 /*
10 output:
11 test 1
12 test 2
13 test 3
14 test 4
15 end:
16 */
17
18 void
19 handler1(int sig)
20 {
21 switch (sig) {
22 case SIGABRT:
23 abrt = 1;
24 break;
25 case SIGFPE:
26 fpe = 1;
27 break;
28 case SIGINT:
29 iint = 1;
30 break;
31 case SIGSEGV:
32 segv = 1;
33 break;
34 case SIGTERM:
35 term = 1;
36 break;
37 default:
38 def = 1;
39 break;
40 }
41 }
42
43 void
44 handler2(int sig)
45 {
46 switch (sig) {
47 case SIGABRT:
48 abrt = 1;
49 break;
50 case SIGFPE:
51 fpe = 1;
52 break;
53 case SIGINT:
54 iint = 1;
55 break;
56 case SIGSEGV:
57 segv = 1;
58 break;
59 case SIGTERM:
60 term = 1;
61 break;
62 default:
63 def = 1;
64 break;
65 }
66 longjmp(recover, 1);
67 }
68
69 void
70 test1()
71 {
72 puts("test 1");
73 assert(signal(SIGABRT, handler1) == SIG_DFL);
74 assert(signal(SIGFPE, handler1) == SIG_DFL);
75 assert(signal(SIGINT, handler1) == SIG_DFL);
76 assert(signal(SIGSEGV, handler1) == SIG_DFL);
77 assert(signal(SIGTERM, handler1) == SIG_DFL);
78 }
79
80 void
81 test2()
82 {
83 puts("test 2");
84 term = abrt = fpe = iint = segv = 0;
85 assert(signal(SIGABRT, handler1) == handler1);
86 assert(signal(SIGFPE, handler1) == handler1);
87 assert(signal(SIGINT, handler1) == handler1);
88 assert(signal(SIGSEGV, handler1) == handler1);
89 assert(signal(SIGTERM, handler1) == handler1);
90
91 assert(raise(SIGABRT) != -1);
92 assert(raise(SIGFPE) != -1);
93 assert(raise(SIGINT) != -1);
94 assert(raise(SIGSEGV) != -1);
95 assert(raise(SIGTERM) != -1);
96
97 if (!abrt || !fpe || !iint || !segv || !term)
98 printf("a handled signal was missed: %d %d %d %d %d\n",
99 abrt, fpe, iint, segv, term);
100 if (def)
101 puts("a wrong signal was received");
102 }
103
104 void
105 test3()
106 {
107 puts("test 3");
108 def = abrt = term = fpe = iint = segv = 0;
109 assert(signal(SIGABRT, SIG_IGN) == handler1);
110 assert(signal(SIGFPE, SIG_IGN) == handler1);
111 assert(signal(SIGINT, SIG_IGN) == handler1);
112 assert(signal(SIGSEGV, SIG_IGN) == handler1);
113 assert(signal(SIGTERM, SIG_IGN) == handler1);
114
115 assert(raise(SIGABRT) != -1);
116 assert(raise(SIGFPE) != -1);
117 assert(raise(SIGINT) != -1);
118 assert(raise(SIGSEGV) != -1);
119 assert(raise(SIGTERM) != -1);
120
121 if (abrt || fpe || iint || segv || term)
122 printf("a handled signal was received: %d %d %d %d %d\n",
123 abrt, fpe, iint, segv, term);
124 if (def)
125 puts("a wrong signal was received");
126 }
127
128 void
129 test4()
130 {
131 puts("test 4");
132 def = abrt = term = fpe = iint = segv = 0;
133 assert(signal(SIGABRT, handler2) == SIG_IGN);
134 assert(signal(SIGFPE, handler2) == SIG_IGN);
135 assert(signal(SIGINT, handler2) == SIG_IGN);
136 assert(signal(SIGSEGV, handler2) == SIG_IGN);
137 assert(signal(SIGTERM, handler2) == SIG_IGN);
138
139 if (!setjmp(recover))
140 assert(raise(SIGABRT) != -1);
141 if (!setjmp(recover))
142 assert(raise(SIGFPE) != -1);
143 if (!setjmp(recover))
144 assert(raise(SIGINT) != -1);
145 if (!setjmp(recover))
146 assert(raise(SIGSEGV) != -1);
147 if (!setjmp(recover))
148 assert(raise(SIGTERM) != -1);
149
150 if (!abrt || !fpe || !iint || !segv || !term)
151 printf("a handled signal was missed: %d %d %d %d %d\n",
152 abrt, fpe, iint, segv, term);
153 if (def)
154 puts("a wrong signal was received");
155 }
156
157 int
158 main()
159 {
160 assert(SIG_ERR != SIG_IGN && SIG_ERR != SIG_DFL);
161
162 test1();
163 test2();
164 test3();
165 test4();
166
167 return 0;
168 }