1/*
2* Copyright (c) 2004, 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 assertion:
19*
20* The new process has only one thread.
21
22* The steps are:
23* -> create a thread.
24* -> fork
25* -> Check that the thread is not running in the new process image.
26
27* The test fails if the thread is executing in the child process.
28
29*/
30
31
32/* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
33#define _POSIX_C_SOURCE 200112L
34
35/********************************************************************************************/
36/****************************** standard includes *****************************************/
37/********************************************************************************************/
38#include <pthread.h>
39 #include <stdarg.h>
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <string.h>
43 #include <unistd.h>
44
45#include <sys/wait.h>
46 #include <errno.h>
47
48#include <semaphore.h>
49#include <fcntl.h>
50
51/********************************************************************************************/
52/******************************   Test framework   *****************************************/
53/********************************************************************************************/
54#include "testfrmw.h"
55 #include "testfrmw.c"
56/* This header is responsible for defining the following macros:
57 * UNRESOLVED(ret, descr);
58 *    where descr is a description of the error and ret is an int (error code for example)
59 * FAILED(descr);
60 *    where descr is a short text saying why the test has failed.
61 * PASSED();
62 *    No parameter.
63 *
64 * Both three macros shall terminate the calling process.
65 * The testcase shall not terminate in any other maneer.
66 *
67 * The other file defines the functions
68 * void output_init()
69 * void output(char * string, ...)
70 *
71 * Those may be used to output information.
72 */
73
74/********************************************************************************************/
75/********************************** Configuration ******************************************/
76/********************************************************************************************/
77#ifndef VERBOSE
78#define VERBOSE 1
79#endif
80
81/********************************************************************************************/
82/***********************************    Test case   *****************************************/
83/********************************************************************************************/
84
85sem_t * sem;
86
87/* Thread function */
88void * threaded( void * arg )
89{
90	int ret = 0;
91
92	do
93	{
94		ret = sem_wait( sem );
95	}
96	while ( ( ret != 0 ) && ( errno == EINTR ) );
97
98	if ( ret != 0 )
99	{
100		UNRESOLVED( errno, "failed to wait for the semaphore in child" );
101	}
102
103	if ( *( pid_t * ) arg != getpid() )
104	{
105		FAILED( "The thread is executing in the child process" );
106	}
107
108	return NULL;
109}
110
111/* The main test function. */
112int main( int argc, char * argv[] )
113{
114	int ret, status;
115	pid_t child, ctl;
116	pthread_t th;
117
118	/* Initialize output */
119	output_init();
120
121	ctl = getpid();
122
123	/* Initialize the semaphore */
124	sem = sem_open( "/fork_21_1", O_CREAT, O_RDWR, 0 );
125
126	if ( sem == ( sem_t * ) SEM_FAILED )
127	{
128		UNRESOLVED( errno, "Failed to open the semaphore" );
129	}
130
131	sem_unlink( "/fork_21_1" );
132
133
134	/* Create thread */
135	ret = pthread_create( &th, NULL, threaded, &ctl );
136
137	if ( ret != 0 )
138	{
139		UNRESOLVED( ret, "Failed to create the thread" );
140	}
141
142
143	/* Create the child */
144	child = fork();
145
146	if ( child == ( pid_t ) - 1 )
147	{
148		UNRESOLVED( errno, "Failed to fork" );
149	}
150
151	/* We post the semaphore twice */
152	do
153	{
154		ret = sem_post( sem );
155	}
156	while ( ( ret != 0 ) && ( errno == EINTR ) );
157
158	if ( ret != 0 )
159	{
160		UNRESOLVED( errno, "Failed to post the semaphore" );
161	}
162
163	/* child */
164	if ( child == ( pid_t ) 0 )
165	{
166		/* sleep a little while to let the thread execute in case it exists */
167		sleep( 1 );
168
169		/* We're done */
170		exit( PTS_PASS );
171	}
172
173	/* Parent joins the child */
174	ctl = waitpid( child, &status, 0 );
175
176	if ( ctl != child )
177	{
178		UNRESOLVED( errno, "Waitpid returned the wrong PID" );
179	}
180
181	if ( ( !WIFEXITED( status ) ) || ( WEXITSTATUS( status ) != PTS_PASS ) )
182	{
183		FAILED( "Child exited abnormally" );
184	}
185
186	/* Destroy everything */
187	ret = sem_close( sem );
188
189	if ( ret != 0 )
190	{
191		UNRESOLVED( errno, "Failed to close the semaphore" );
192	}
193
194	ret = pthread_join( th, NULL );
195
196	if ( ret != 0 )
197	{
198		UNRESOLVED( ret, "Failed to join the thread in parent" );
199	}
200
201	/* Test passed */
202#if VERBOSE > 0
203	output( "Test passed\n" );
204
205#endif
206	PASSED;
207}
208
209