6-1.c revision 8d9c084e1770f2719ef99a79416584c945cc775f 
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* This sample test aims to check the following assertion:
18*
19*  A call to sem_open with the same name refers to a new semaphore, once
20* sem_unlink has been called.
21
22* The steps are:
23* -> open a semaphore
24* -> unlink
25* -> try to reconnect (should fail)
26* -> open with O_CREATE
27* -> check the semaphore are different
28
29*/
30
31/* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
32#define _POSIX_C_SOURCE 200112L
33
34/******************************************************************************/
35/*************************** standard includes ********************************/
36/******************************************************************************/
37#include <pthread.h>
38#include <stdarg.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <unistd.h>
43
44#include <semaphore.h>
45#include <errno.h>
46#include <fcntl.h>
47
48/******************************************************************************/
49/***************************   Test framework   *******************************/
50/******************************************************************************/
51#include "../testfrmw/testfrmw.h"
52#include "../testfrmw/testfrmw.c"
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
72/******************************************************************************/
73/**************************** Configuration ***********************************/
74/******************************************************************************/
75#ifndef VERBOSE
76#define VERBOSE 1
77#endif
78
79#define SEM_NAME  "/sem_unlink_6_1"
80
81/******************************************************************************/
82/***************************    Test case   ***********************************/
83/******************************************************************************/
84
85/* The main test function. */
86int main(int argc, char * argv[])
87{
88	int ret, value;
89
90	sem_t * sem1, * sem2;
91
92	/* Initialize output */
93	output_init();
94
95	/* Create the semaphore */
96	sem1 = sem_open(SEM_NAME, O_CREAT | O_EXCL, 0777, 1);
97
98	if ((sem1 == SEM_FAILED) && (errno == EEXIST))
99	{
100		sem_unlink(SEM_NAME);
101		sem1 = sem_open(SEM_NAME, O_CREAT | O_EXCL, 0777, 1);
102	}
103
104	if (sem1 == SEM_FAILED)
105	{
106		UNRESOLVED(errno, "Failed to create the semaphore");
107	}
108
109	/* Unlink */
110	ret = sem_unlink(SEM_NAME);
111
112	if (ret != 0)
113	{
114		UNRESOLVED(errno, "Failed to unlink the semaphore");
115	}
116
117	/* Try reconnect */
118	sem2 = sem_open(SEM_NAME, 0);
119
120	if (sem2 != SEM_FAILED)
121	{
122		FAILED("Reconnecting the unlinked semaphore did not failed");
123	}
124
125	if (errno != ENOENT)
126	{
127		output("Error %d: %s\n", errno, strerror(errno));
128		FAILED("Reconnecting the unlinked semaphore failed with a wrong error");
129	}
130
131	/* Reopen the semaphore */
132	sem2 = sem_open(SEM_NAME, O_CREAT | O_EXCL, 0777, 3);
133
134	if (sem2 == SEM_FAILED)
135	{
136		output("Gor error %d: %s\n", errno, strerror(errno));
137		FAILED("Failed to recreate the semaphore");
138	}
139
140	/* Check the semaphore have different values */
141	ret = sem_getvalue(sem1, &value);
142
143	if (ret != 0)
144	{
145		UNRESOLVED(errno, "Failed to read sem1 value");
146	}
147
148	if (value != 1)
149	{
150		output("Read: %d\n", value);
151		FAILED("Semaphore value is not as expected");
152	}
153
154	ret = sem_getvalue(sem2, &value);
155
156	if (ret != 0)
157	{
158		UNRESOLVED(errno, "Failed to read sem1 value");
159	}
160
161	if (value != 3)
162	{
163		output("Read: %d\n", value);
164		FAILED("Semaphore value is not as expected");
165	}
166
167	/* Unlink */
168	ret = sem_unlink(SEM_NAME);
169
170	if (ret != 0)
171	{
172		UNRESOLVED(errno, "Failed to unlink the semaphore");
173	}
174
175	/* close both */
176	ret = sem_close(sem1);
177
178	if (ret != 0)
179	{
180		UNRESOLVED(errno, "Failed to close the semaphore");
181	}
182
183	ret = sem_close(sem2);
184
185	if (ret != 0)
186	{
187		UNRESOLVED(errno, "Failed to close the semaphore");
188	}
189
190	/* Test passed */
191#if VERBOSE > 0
192	output("Test passed\n");
193
194#endif
195	PASSED;
196}