getdents02.c revision 74948ad801d4aba1c872652580b8b331e41aefca 
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 <linux/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
73int main(int ac, char **av)
74{
75	int lc;				/* loop counter */
76	char *msg;			/* message returned from parse_opts */
77	int rval, fd;
78	int count;
79	const int cnum = 141;		/* system call number 141 = getdents */
80	size_t size = 0;
81	char *dir_name = NULL;
82	struct dirent *dirp;
83
84#ifndef __i386__
85	tst_resm(TINFO, "This test includes x86 asm and will not work on "
86			"this machine");
87	tst_exit();
88#endif /* __i386__ */
89
90	/* parse standard options */
91	if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
92		tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
93	}
94
95	setup();			/* global setup */
96
97	/* The following loop checks looping state if -i option given */
98
99	for (lc = 0; TEST_LOOPING(lc); lc++) {
100		/* reset Tst_count in case we are looping */
101		Tst_count = 0;
102
103		/* get the current working directory */
104
105		if ((dir_name = getcwd(dir_name, size)) == NULL) {
106			tst_brkm(TBROK, cleanup, "Can not get current "
107				 "directory name");
108		}
109
110		/* allocate some space for the dirent structure */
111
112		if ((dirp =
113		     (struct dirent *)malloc(sizeof(struct dirent))) == NULL) {
114			tst_brkm(TBROK, cleanup, "malloc failed");
115		}
116
117		/* set up count to be equal to the sizeof struct dirent */
118
119		count = (int)sizeof(struct dirent);
120
121		/* set up a bad file descriptor */
122
123		fd = -5;
124
125		/*
126		 * here's a case where invoking the system call directly
127		 * doesn't seem to work.  getdents.h has an assembly
128		 * macro to do the job.
129		 *
130		 * equivalent to  - getdents(fd, dirp, count);
131		 * if we could call getdents that way.
132		 */
133
134		rval = GETDENTS_ASM();
135
136		/*
137		 * Hopefully we get an error due to the bad file descriptor.
138		 */
139
140		if (rval < 0) {		/* call returned an error */
141			rval *= -1;
142			TEST_ERROR_LOG(rval);
143
144			switch(rval) {
145			case EBADF:
146				tst_resm(TPASS, "expected failure - errno = %d "
147					 "- %s", rval, strerror(rval));
148				break;
149			default:
150				tst_resm(TFAIL, "%s call failed to "
151					 "produce EBADF - errno = %d : %s",
152					 TCID, rval, strerror(rval));
153				break;
154			}
155		} else {
156			tst_resm(TFAIL, "call failed to produce an "
157				 "expected error - errno = %d - %s", rval,
158				 strerror(rval));
159		}
160
161		/*
162		 * clean up things in case we are looping
163		 */
164		free(dir_name);
165		dir_name = NULL;
166
167		free(dirp);
168	}
169
170	cleanup();
171
172	/*NOTREACHED*/
173}
174
175/*
176 * setup() - performs all the ONE TIME setup for this test.
177 */
178void
179setup(void)
180{
181	/* capture signals */
182	tst_sig(NOFORK, DEF_HANDLER, cleanup);
183
184	/* Pause if that option was specified */
185	TEST_PAUSE;
186
187	/* create a test directory and cd into it */
188	tst_tmpdir();
189
190	/* Set up the expected error numbers for -e option */
191	TEST_EXP_ENOS(exp_enos);
192}
193
194/*
195 * cleanup() - performs all the ONE TIME cleanup for this test at completion
196 * 	       or premature exit.
197 */
198void
199cleanup(void)
200{
201	/* remove the test directory */
202	tst_rmdir();
203
204	/*
205	 * print timing stats if that option was specified.
206	 * print errno log if that option was specified.
207	 */
208	TEST_CLEANUP;
209
210	/* exit with return code appropriate for results */
211	tst_exit();
212}
213
214