waitpid05.c revision d17884d8c2207af1e8eca25ba16d475fa59c7a62 
1/*
2 *
3 *   Copyright (c) International Business Machines  Corp., 2001
4 *
5 *   This program is free software;  you can redistribute it and/or modify
6 *   it under the terms of the GNU General Public License as published by
7 *   the Free Software Foundation; either version 2 of the License, or
8 *   (at your option) any later version.
9 *
10 *   This program is distributed in the hope that it will be useful,
11 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
12 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
13 *   the GNU General Public License for more details.
14 *
15 *   You should have received a copy of the GNU General Public License
16 *   along with this program;  if not, write to the Free Software
17 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20/*
21 * NAME
22 *	waitpid05.c
23 *
24 * DESCRIPTION
25 *	Check that when a child kills itself with a kill statement after
26 *	determining its process id by using getpid, the parent receives a
27 *	correct report of the cause of its death. This also indirectly
28 *	checks that getpid returns the correct process id.
29 *
30 * ALGORITHM
31 *	For signals 1 - 15: fork a child that determines it's own process
32 *	id, then sends the signal to itself.  The parent waits to see if the
33 *	demise of the child results in the signal number being returned to
34 *	the parent.
35 *
36 * USAGE:  <for command-line>
37 *      waitpid05 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
38 *      where,  -c n : Run n copies concurrently.
39 *              -e   : Turn on errno logging.
40 *              -i n : Execute test n times.
41 *              -I x : Execute test for x seconds.
42 *              -P x : Pause for x seconds between iterations.
43 *              -t   : Turn on syscall timing.
44 *
45 * History
46 *	07/2001 John George
47 *		-Ported
48 *	04/2002 wjhuie sigset cleanups
49 *
50 * Restrictions
51 *	None
52 */
53
54#include <sys/file.h>
55#include <sys/signal.h>
56#include <sys/types.h>
57#include <sys/wait.h>
58#include <sys/time.h>
59#include <sys/resource.h>
60#include <unistd.h>
61#include <errno.h>
62#include <test.h>
63#include <usctest.h>
64
65void do_child(int);
66void setup(void);
67void cleanup(void);
68
69char *TCID = "waitpid05";
70int TST_TOTAL = 1;
71extern int Tst_count;
72
73int flag;
74#define	FAILED	1
75
76#ifdef UCLINUX
77void do_child_uclinux(void);
78static int sig_uclinux;
79#endif
80
81int main(int ac, char **av)
82{
83	int pid, npid, sig, nsig;
84	int exno, nexno, status;
85	int lc;				/* loop counter */
86	char *msg;			/* message returned from parse_opts */
87
88	/* parse standard options */
89	if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) !=
90	    (char *) NULL) {
91		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
92		tst_exit();
93		/*NOTREACHED*/
94	}
95
96#ifdef UCLINUX
97	maybe_run_child(&do_child_uclinux, "d", &sig_uclinux);
98#endif
99
100	setup();
101
102	/* check for looping state if -i option is given */
103	for (lc = 0; TEST_LOOPING(lc); lc++) {
104		/* reset Tst_count in case we are looping */
105		Tst_count = 0;
106
107		/*
108		 * Set SIGTERM to SIG_DFL as test driver sets up to ignore
109		 * SIGTERM
110	 	 */
111		if (signal(SIGTERM, SIG_DFL) == SIG_ERR) {
112			tst_resm(TFAIL, "Sigset SIGTERM failed, errno = %d",
113				 errno);
114			tst_exit();
115		}
116
117		exno = 1;
118		for (sig = 1; sig <= 15; sig++) {
119			if (sig == SIGUSR1 || sig == SIGUSR2 || sig == SIGBUS) {
120				continue;
121			}
122                        /*Initialize signal to its default action*/
123                        signal(sig,SIG_DFL);
124			pid = FORK_OR_VFORK();
125
126			if (pid == 0) {
127#ifdef UCLINUX
128				self_exec(av[0], "d", sig);
129				/* No fork() error check is done so don't */
130				/* do an error check here */
131#else
132				do_child(sig);
133#endif
134			} else {
135				errno = 0;
136				while (((npid = waitpid(pid, &status, 0)) !=
137					-1) || (errno == EINTR)) {
138					if (errno == EINTR) {
139						continue;
140					}
141					if (npid != pid) {
142						tst_resm(TFAIL, "waitpid "
143							 "error: unexpected "
144							 "pid returned");
145					} else {
146						tst_resm(TPASS, "received "
147							"expected pid.");
148					}
149
150					nsig = status % 256;
151
152					/*
153					 * to check if the core dump bit has
154					 * been set, bit #7
155					 */
156					if (nsig >= 128) {
157						nsig -= 128;
158						if ((sig == 1) || (sig == 2) ||
159						    (sig == 9) ||
160						    (sig == 13) ||
161						    (sig == 14) ||
162						    (sig == 15)) {
163							tst_resm(TFAIL,
164								 "signal "
165								 "error : "
166								 "core dump "
167								 "bit set for"
168								 " exception "
169								 "number %d",
170								 sig);
171						}
172					} else if ((sig == 3) || (sig == 4) ||
173						   (sig == 5) || (sig == 6) ||
174						   (sig == 8) || (sig == 11)) {
175						tst_resm(TFAIL,
176							 "signal error: "
177							 "core dump bit not "
178							 "set for exception "
179							 "number %d", sig);
180					}
181
182					/*
183					 * nsig is the signal number returned
184					 * by waitpid
185					 */
186					if (nsig != sig) {
187						tst_resm(TFAIL, "waitpid "
188							 "error: unexpected "
189							 "signal returned");
190						tst_resm(TINFO, "got signal "
191							 "%d, expected  "
192							 "%d", nsig, sig);
193					}
194
195					/*
196					 * nexno is the exit number returned
197					 * by waitpid
198					 */
199					nexno = status / 256;
200					if (nexno != 0) {
201						tst_resm(TFAIL, "signal "
202							 "error: unexpected "
203							 "exit number "
204							 "returned");
205					} else {
206						tst_resm(TPASS, "received "
207							"expected exit number.");
208					}
209				}
210			}
211		}
212
213		if (access("core", F_OK) == 0) {
214			unlink("core");
215		}
216	}
217	cleanup();
218	/*NOTREACHED*/
219
220  return(0);
221
222}
223
224/*
225 * do_child()
226 */
227void
228do_child(int sig)
229{
230	int exno = 1;
231	int pid = getpid();
232
233	if (kill(pid, sig) == -1) {
234		tst_resm(TFAIL, "kill error: kill unsuccessful");
235		exit(exno);
236	}
237}
238
239#ifdef UCLINUX
240/*
241 * do_child_uclinux()
242 *	run do_child with the appropriate sig variable
243 */
244void
245do_child_uclinux()
246{
247	do_child(sig_uclinux);
248}
249#endif
250
251/*
252 * setup()
253 *	performs all ONE TIME setup for this test
254 */
255void
256setup(void)
257{
258	struct rlimit newlimit;
259
260	/* Pause if that option was specified
261	 * TEST_PAUSE contains the code to fork the test with the -c option.
262	 * You want to make sure you do this before you create your temporary
263	 * directory.
264	 */
265	TEST_PAUSE;
266
267	/* Create a unique temporary directory and chdir() to it. */
268	tst_tmpdir();
269
270	newlimit.rlim_max = newlimit.rlim_cur = RLIM_INFINITY;
271	if (setrlimit(RLIMIT_CORE, &newlimit) != 0)
272		tst_resm(TWARN, "setrlimit(RLIMIT_CORE,RLIM_INFINITY) failed; this may cause some false core-dump test failures");
273}
274
275/*
276 * cleanup()
277 *	performs all ONE TIME cleanup for this test at
278 *	completion or premature exit
279 */
280void
281cleanup(void)
282{
283	/*
284	 * print timing stats if that option was specified.
285	 * print errno log if that option was specified.
286	 */
287	TEST_CLEANUP;
288
289	tst_rmdir();
290
291	/* exit with return code appropriate for results */
292	tst_exit();
293	/*NOTREACHED*/
294}
295