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
21then reinstalling it with act must be valid.
22
23* The steps are:
24* -> register a signal handler for SIGTERM 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
120void output_init()
121{
122	/* do nothing */
123	return ;
124}
125
126void 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
154void 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 SIGTERM
168
169/******************************************************************************/
170/***************************    Test case   ***********************************/
171/******************************************************************************/
172
173sig_atomic_t called = 1;
174
175void handler_1( int sig )
176{
177	called++;
178}
179
180void handler_2( int sig )
181{
182	called--;
183}
184
185/* main function */
186int 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 SIGTERM */
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