1 /*
2 * Copyright (c) 2005, Bull S.A.. All rights reserved.
3 * Created by: Sebastien Decugis
4
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write the Free Software Foundation, Inc., 59
15 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
16
17
18 * This sample test aims to check the following assertions:
19 *
20 * If the signal action was set with the signal() function, getting it into oact
21 then reinstalling it with act must be valid.
22
23 * The steps are:
24 * -> register a signal handler for SIGPOLL with signal().
25 * -> check this signal handler works.
26 * -> change the signal handler with sigaction, saving old handler in oact.
27 * -> check the new signal handler works.
28 * -> set the old signal handler back
29 * -> check the old signal handler still works.
30
31 * The test fails if a signal handler does not work as expected.
32 */
33
34
35 /* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
36 #define _POSIX_C_SOURCE 200112L
37
38 /******************************************************************************/
39 /*************************** standard includes ********************************/
40 /******************************************************************************/
41 #include <stdarg.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46
47 #include <signal.h>
48 #include <errno.h>
49
50 /******************************************************************************/
51 /*************************** Test framework *******************************/
52 /******************************************************************************/
53 /* This header is responsible for defining the following macros:
54 * UNRESOLVED(ret, descr);
55 * where descr is a description of the error and ret is an int
56 * (error code for example)
57 * FAILED(descr);
58 * where descr is a short text saying why the test has failed.
59 * PASSED();
60 * No parameter.
61 *
62 * Both three macros shall terminate the calling process.
63 * The testcase shall not terminate in any other maneer.
64 *
65 * The other file defines the functions
66 * void output_init()
67 * void output(char * string, ...)
68 *
69 * Those may be used to output information.
70 */
71 #include "posixtest.h"
72 #include <time.h>
73 #include <sys/types.h>
74
75 #ifdef __GNUC__ /* We are using GCC */
76
77 #define UNRESOLVED(x, s) \
78 { output("Test %s unresolved: got %i (%s) on line %i (%s)\n", __FILE__, x, strerror(x), __LINE__, s); \
79 output_fini(); \
80 exit(PTS_UNRESOLVED); }
81
82 #define FAILED(s) \
83 { output("Test %s FAILED: %s\n", __FILE__, s); \
84 output_fini(); \
85 exit(PTS_FAIL); }
86
87 #define PASSED \
88 output_fini(); \
89 exit(PTS_PASS);
90
91 #define UNTESTED(s) \
92 { output("File %s cannot test: %s\n", __FILE__, s); \
93 output_fini(); \
94 exit(PTS_UNTESTED); \
95 }
96
97 #else /* not using GCC */
98
99 #define UNRESOLVED(x, s) \
100 { output("Test unresolved: got %i (%s) on line %i (%s)\n", x, strerror(x), __LINE__, s); \
101 output_fini(); \
102 exit(PTS_UNRESOLVED); }
103
104 #define FAILED(s) \
105 { output("Test FAILED: %s\n", s); \
106 output_fini(); \
107 exit(PTS_FAIL); }
108
109 #define PASSED \
110 output_fini(); \
111 exit(PTS_PASS);
112
113 #define UNTESTED(s) \
114 { output("Unable to test: %s\n", s); \
115 output_fini(); \
116 exit(PTS_UNTESTED); \
117 }
118
119 #endif
output_init()120 void output_init()
121 {
122 /* do nothing */
123 return ;
124 }
125
output(char * string,...)126 void output( char * string, ... )
127 {
128 va_list ap;
129 #ifndef PLOT_OUTPUT
130 char *ts = "[??:??:??]";
131
132 struct tm * now;
133 time_t nw;
134 #endif
135
136 #ifndef PLOT_OUTPUT
137 nw = time( NULL );
138 now = localtime( &nw );
139
140 if ( now == NULL )
141 printf( ts );
142 else
143 printf( "[%2.2d:%2.2d:%2.2d]", now->tm_hour, now->tm_min, now->tm_sec );
144
145 #endif
146 va_start( ap, string );
147
148 vprintf( string, ap );
149
150 va_end( ap );
151
152 }
153
output_fini()154 void output_fini()
155 {
156 /*do nothing */
157 return ;
158 }
159
160 /******************************************************************************/
161 /**************************** Configuration ***********************************/
162 /******************************************************************************/
163 #ifndef VERBOSE
164 #define VERBOSE 1
165 #endif
166
167 #define SIGNAL SIGPOLL
168
169 /******************************************************************************/
170 /*************************** Test case ***********************************/
171 /******************************************************************************/
172
173 sig_atomic_t called = 1;
174
handler_1(int sig)175 void handler_1( int sig )
176 {
177 called++;
178 }
179
handler_2(int sig)180 void handler_2( int sig )
181 {
182 called--;
183 }
184
185 /* main function */
main()186 int main()
187 {
188 int ret;
189
190 struct sigaction sa, save;
191
192 /* Initialize output */
193 output_init();
194
195 /* Register the signal handler with signal */
196
197 if ( SIG_ERR == signal( SIGNAL, handler_1 ) )
198 {
199 UNRESOLVED( errno, "Failed to register signal handler with signal()" );
200 }
201
202 /* As whether signal handler is restored to default when executed
203 is implementation defined, we cannot check it was registered here. */
204
205 /* Set the new signal handler with sigaction*/
206 sa.sa_flags = 0;
207
208 sa.sa_handler = handler_2;
209
210 ret = sigemptyset( &sa.sa_mask );
211
212 if ( ret != 0 )
213 {
214 UNRESOLVED( ret, "Failed to empty signal set" );
215 }
216
217 /* Install the signal handler for SIGPOLL */
218 ret = sigaction( SIGNAL, &sa, &save );
219
220 if ( ret != 0 )
221 {
222 UNRESOLVED( ret, "Failed to set signal handler" );
223 }
224
225 /* Check the signal handler has been set up */
226 ret = raise( SIGNAL );
227
228 if ( ret != 0 )
229 {
230 UNRESOLVED( ret , "Failed to raise the signal" );
231 }
232
233 if ( called != 0 )
234 {
235 FAILED( "handler not executed" );
236 }
237
238 /* Restore the first signal handler */
239 ret = sigaction( SIGNAL, &save, 0 );
240
241 if ( ret != 0 )
242 {
243 UNRESOLVED( ret, "Failed to set signal handler" );
244 }
245
246 /* Check the signal handler has been set up */
247 ret = raise( SIGNAL );
248
249 if ( ret != 0 )
250 {
251 UNRESOLVED( ret , "Failed to raise the signal" );
252 }
253
254 if ( called != 1 )
255 {
256 FAILED( "handler not executed" );
257 }
258
259
260 /* Test passed */
261 #if VERBOSE > 0
262
263 output( "Test passed\n" );
264
265 #endif
266
267 PASSED;
268 }
269