waitpid05.c revision 1569799abe4296fc5ca50ede305c1eb2ac482422 
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;
71
72#ifdef UCLINUX
73void do_child_uclinux(void);
74static int sig_uclinux;
75#endif
76
77int main(int ac, char **av)
78{
79	int pid, npid, sig, nsig;
80	int exno, nexno, status;
81	int lc;			/* loop counter */
82	char *msg;		/* message returned from parse_opts */
83
84	/* parse standard options */
85	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) {
86		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
87
88	 }
89#ifdef UCLINUX
90	maybe_run_child(&do_child_uclinux, "d", &sig_uclinux);
91#endif
92
93	setup();
94
95	/* check for looping state if -i option is given */
96	for (lc = 0; TEST_LOOPING(lc); lc++) {
97		/* reset Tst_count in case we are looping */
98		Tst_count = 0;
99
100		/*
101		 * Set SIGTERM to SIG_DFL as test driver sets up to ignore
102		 * SIGTERM
103		 */
104		if (signal(SIGTERM, SIG_DFL) == SIG_ERR) {
105			tst_resm(TFAIL, "Sigset SIGTERM failed, errno = %d",
106				 errno);
107
108		}
109
110		exno = 1;
111		for (sig = 1; sig <= 15; sig++) {
112			if (sig == SIGUSR1 || sig == SIGUSR2 || sig == SIGBUS) {
113				continue;
114			}
115			/*Initialize signal to its default action */
116			signal(sig, SIG_DFL);
117			pid = FORK_OR_VFORK();
118
119			if (pid == 0) {
120#ifdef UCLINUX
121				self_exec(av[0], "d", sig);
122				/* No fork() error check is done so don't */
123				/* do an error check here */
124#else
125				do_child(sig);
126#endif
127			} else {
128				errno = 0;
129				while (((npid = waitpid(pid, &status, 0)) !=
130					-1) || (errno == EINTR)) {
131					if (errno == EINTR) {
132						continue;
133					}
134					if (npid != pid) {
135						tst_resm(TFAIL, "waitpid "
136							 "error: unexpected "
137							 "pid returned");
138					} else {
139						tst_resm(TPASS, "received "
140							 "expected pid.");
141					}
142
143					nsig = status % 256;
144
145					/*
146					 * to check if the core dump bit has
147					 * been set, bit #7
148					 */
149					if (nsig >= 128) {
150						nsig -= 128;
151						if ((sig == 1) || (sig == 2) ||
152						    (sig == 9) ||
153						    (sig == 13) ||
154						    (sig == 14) ||
155						    (sig == 15)) {
156							tst_resm(TFAIL,
157								 "signal "
158								 "error : "
159								 "core dump "
160								 "bit set for"
161								 " exception "
162								 "number %d",
163								 sig);
164						}
165					} else if ((sig == 3) || (sig == 4) ||
166						   (sig == 5) || (sig == 6) ||
167						   (sig == 8) || (sig == 11)) {
168						tst_resm(TFAIL,
169							 "signal error: "
170							 "core dump bit not "
171							 "set for exception "
172							 "number %d", sig);
173					}
174
175					/*
176					 * nsig is the signal number returned
177					 * by waitpid
178					 */
179					if (nsig != sig) {
180						tst_resm(TFAIL, "waitpid "
181							 "error: unexpected "
182							 "signal returned");
183						tst_resm(TINFO, "got signal "
184							 "%d, expected  "
185							 "%d", nsig, sig);
186					}
187
188					/*
189					 * nexno is the exit number returned
190					 * by waitpid
191					 */
192					nexno = status / 256;
193					if (nexno != 0) {
194						tst_resm(TFAIL, "signal "
195							 "error: unexpected "
196							 "exit number "
197							 "returned");
198					} else {
199						tst_resm(TPASS, "received "
200							 "expected exit number.");
201					}
202				}
203			}
204		}
205
206		if (access("core", F_OK) == 0) {
207			unlink("core");
208		}
209	}
210	cleanup();
211	tst_exit();
212
213}
214
215/*
216 * do_child()
217 */
218void do_child(int sig)
219{
220	int exno = 1;
221	int pid = getpid();
222
223	if (kill(pid, sig) == -1) {
224		tst_resm(TFAIL, "kill error: kill unsuccessful");
225		exit(exno);
226	}
227}
228
229#ifdef UCLINUX
230/*
231 * do_child_uclinux()
232 *	run do_child with the appropriate sig variable
233 */
234void do_child_uclinux()
235{
236	do_child(sig_uclinux);
237}
238#endif
239
240/*
241 * setup()
242 *	performs all ONE TIME setup for this test
243 */
244void setup(void)
245{
246	struct rlimit newlimit;
247
248	/* Pause if that option was specified
249	 * TEST_PAUSE contains the code to fork the test with the -c option.
250	 * You want to make sure you do this before you create your temporary
251	 * directory.
252	 */
253	TEST_PAUSE;
254
255	/* Create a unique temporary directory and chdir() to it. */
256	tst_tmpdir();
257
258	newlimit.rlim_max = newlimit.rlim_cur = RLIM_INFINITY;
259	if (setrlimit(RLIMIT_CORE, &newlimit) != 0)
260		tst_resm(TWARN,
261			 "setrlimit(RLIMIT_CORE,RLIM_INFINITY) failed; this may cause some false core-dump test failures");
262}
263
264/*
265 * cleanup()
266 *	performs all ONE TIME cleanup for this test at
267 *	completion or premature exit
268 */
269void cleanup(void)
270{
271	/*
272	 * print timing stats if that option was specified.
273	 * print errno log if that option was specified.
274	 */
275	TEST_CLEANUP;
276
277	tst_rmdir();
278
279 }