getdents02.c revision e1f008ec81a2828dfb2113ce97347946f42e9f3e 
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 *	getdents02.c
23 *
24 * DESCRIPTION
25 *	getdents02 - check that we get a failure with a bad file descriptor
26 *
27 * ALGORITHM
28 *	loop if that option was specified
29 *	issue the system call using a bad file descriptor
30 *	check the errno value
31 *	  issue a PASS message if we get EBADF - errno 9
32 *	otherwise, the tests fails
33 *	  issue a FAIL message
34 *	  break any remaining tests
35 *	  call cleanup
36 *
37 * USAGE:  <for command-line>
38 *  getdents02 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
39 *     where,  -c n : Run n copies concurrently.
40 *             -e   : Turn on errno logging.
41 *	       -i n : Execute test n times.
42 *	       -I x : Execute test for x seconds.
43 *	       -P x : Pause for x seconds between iterations.
44 *	       -t   : Turn on syscall timing.
45 *
46 * HISTORY
47 *	03/2001 - Written by Wayne Boyer
48 *
49 * RESTRICTIONS
50 *	none
51 */
52
53#include "getdents.h"
54#include "test.h"
55#include "usctest.h"
56
57#include <errno.h>
58#include <fcntl.h>
59#include <linux/types.h>
60#include <dirent.h>
61#include <linux/unistd.h>
62#include <unistd.h>
63
64void cleanup(void);
65void setup(void);
66
67char *TCID = "getdents02";
68int TST_TOTAL = 1;
69extern int Tst_count;
70
71int exp_enos[] = { EBADF, 0 };	/* 0 terminated list of expected errnos */
72
73#ifndef __i386__
74int main()
75{
76	tst_resm(TINFO, "This test includes x86 asm and will not work on "
77		 "this machine");
78	tst_exit();
79	return 0;
80}
81#else
82
83int main(int ac, char **av)
84{
85	int lc;			/* loop counter */
86	char *msg;		/* message returned from parse_opts */
87	int rval, fd;
88	int count;
89	const int cnum = 141;	/* system call number 141 = getdents */
90	size_t size = 0;
91	char *dir_name = NULL;
92	struct dirent *dirp;
93
94	/* parse standard options */
95	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) {
96		tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
97	}
98
99	setup();		/* global setup */
100
101	/* The following loop checks looping state if -i option given */
102
103	for (lc = 0; TEST_LOOPING(lc); lc++) {
104		/* reset Tst_count in case we are looping */
105		Tst_count = 0;
106
107		/* get the current working directory */
108
109		if ((dir_name = getcwd(dir_name, size)) == NULL) {
110			tst_brkm(TBROK, cleanup, "Can not get current "
111				 "directory name");
112		}
113
114		/* allocate some space for the dirent structure */
115
116		if ((dirp =
117		     (struct dirent *)malloc(sizeof(struct dirent))) == NULL) {
118			tst_brkm(TBROK, cleanup, "malloc failed");
119		}
120
121		/* set up count to be equal to the sizeof struct dirent */
122
123		count = (int)sizeof(struct dirent);
124
125		/* set up a bad file descriptor */
126
127		fd = -5;
128
129		/*
130		 * here's a case where invoking the system call directly
131		 * doesn't seem to work.  getdents.h has an assembly
132		 * macro to do the job.
133		 *
134		 * equivalent to  - getdents(fd, dirp, count);
135		 * if we could call getdents that way.
136		 */
137
138		rval = GETDENTS_ASM();
139
140		/*
141		 * Hopefully we get an error due to the bad file descriptor.
142		 */
143
144		if (rval < 0) {	/* call returned an error */
145			rval *= -1;
146			TEST_ERROR_LOG(rval);
147
148			switch (rval) {
149			case EBADF:
150				tst_resm(TPASS, "expected failure - errno = %d "
151					 "- %s", rval, strerror(rval));
152				break;
153			default:
154				tst_resm(TFAIL, "%s call failed to "
155					 "produce EBADF - errno = %d : %s",
156					 TCID, rval, strerror(rval));
157				break;
158			}
159		} else {
160			tst_resm(TFAIL, "call failed to produce an "
161				 "expected error - errno = %d - %s", rval,
162				 strerror(rval));
163		}
164
165		/*
166		 * clean up things in case we are looping
167		 */
168		free(dir_name);
169		dir_name = NULL;
170
171		free(dirp);
172	}
173
174	cleanup();
175
176	 /*NOTREACHED*/ return 0;
177}
178
179/*
180 * setup() - performs all the ONE TIME setup for this test.
181 */
182void setup(void)
183{
184	/* capture signals */
185	tst_sig(NOFORK, DEF_HANDLER, cleanup);
186
187	/* Pause if that option was specified */
188	TEST_PAUSE;
189
190	/* create a test directory and cd into it */
191	tst_tmpdir();
192
193	/* Set up the expected error numbers for -e option */
194	TEST_EXP_ENOS(exp_enos);
195}
196
197/*
198 * cleanup() - performs all the ONE TIME cleanup for this test at completion
199 *	       or premature exit.
200 */
201void cleanup(void)
202{
203	/* remove the test directory */
204	tst_rmdir();
205
206	/*
207	 * print timing stats if that option was specified.
208	 * print errno log if that option was specified.
209	 */
210	TEST_CLEANUP;
211
212	/* exit with return code appropriate for results */
213	tst_exit();
214}
215
216#endif /* __i386__ */
217