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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 /*
21 * Test Name: ftruncate01
22 *
23 * Test Description:
24 * Verify that, ftruncate(2) succeeds to truncate a file to a specified
25 * length if the file indicated by file descriptor opened for writing.
26 *
27 * Expected Result:
28 * ftruncate(2) should return a value 0 and the length of the file after
29 * truncation should be equal to the length it is truncated to.
30 *
31 * Algorithm:
32 * Setup:
33 * Setup signal handling.
34 * Create temporary directory.
35 * Pause for SIGUSR1 if option specified.
36 *
37 * Test:
38 * Loop if the proper options are given.
39 * Execute system call
40 * Check return code, if system call failed (return=-1)
41 * Log the errno and Issue a FAIL message.
42 * Otherwise,
43 * Verify the Functionality of system call
44 * if successful,
45 * Issue Functionality-Pass message.
46 * Otherwise,
47 * Issue Functionality-Fail message.
48 * Cleanup:
49 * Print errno log and/or timing stats if options given
50 * Delete the temporary directory created.
51 *
52 * Usage: <for command-line>
53 * ftruncate01 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
54 * where, -c n : Run n copies concurrently.
55 * -f : Turn off functionality Testing.
56 * -i n : Execute test n times.
57 * -I x : Execute test for x seconds.
58 * -P x : Pause for x seconds between iterations.
59 * -t : Turn on syscall timing.
60 *
61 * HISTORY
62 * 07/2001 Ported by Wayne Boyer
63 *
64 * RESTRICTIONS:
65 * This test should be run by 'non-super-user' only.
66 *
67 */
68
69 #include <sys/types.h>
70 #include <sys/stat.h>
71 #include <fcntl.h>
72 #include <errno.h>
73 #include <string.h>
74 #include <signal.h>
75 #include <inttypes.h>
76
77 #include "test.h"
78 #include "safe_macros.h"
79
80 #define TESTFILE "testfile" /* file under test */
81 #define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
82 #define BUF_SIZE 256 /* buffer size */
83 #define FILE_SIZE 1024 /* test file size */
84 #define TRUNC_LEN 256 /* truncation length */
85
86 TCID_DEFINE(ftruncate01);
87 int TST_TOTAL = 1; /* Total number of test conditions */
88 int fildes; /* file descriptor for test file */
89
90 void setup(); /* setup function for the test */
91 void cleanup(); /* cleanup function for the test */
92
main(int ac,char ** av)93 int main(int ac, char **av)
94 {
95 struct stat stat_buf; /* stat(2) struct contents */
96 int lc;
97 off_t file_length; /* test file length */
98
99 tst_parse_opts(ac, av, NULL, NULL);
100
101 setup();
102
103 for (lc = 0; TEST_LOOPING(lc); lc++) {
104
105 tst_count = 0;
106
107 /*
108 * Call ftruncate(2) to truncate a test file to a
109 * specified length.
110 */
111 TEST(ftruncate(fildes, TRUNC_LEN));
112
113 if (TEST_RETURN == -1) {
114 tst_resm(TFAIL | TTERRNO, "ftruncate(%s) failed",
115 TESTFILE);
116 continue;
117 }
118 /*
119 * Get the testfile information using
120 * fstat(2).
121 */
122 if (fstat(fildes, &stat_buf) < 0) {
123 tst_brkm(TFAIL, cleanup,
124 "stat(2) of %s failed, error:%d",
125 TESTFILE, errno);
126 }
127 stat_buf.st_mode &= ~S_IFREG;
128 file_length = stat_buf.st_size;
129
130 /*
131 * Check for expected size of testfile after
132 * truncate(2) on it.
133 */
134 if (file_length != TRUNC_LEN) {
135 tst_resm(TFAIL,
136 "%s: Incorrect file size %" PRId64 ", "
137 "Expected %d", TESTFILE,
138 (int64_t) file_length, TRUNC_LEN);
139 } else {
140 tst_resm(TPASS, "Functionality of ftruncate() "
141 "on %s successful", TESTFILE);
142 }
143 }
144
145 cleanup();
146 tst_exit();
147 }
148
149 /*
150 * void
151 * setup() - performs all ONE TIME setup for this test.
152 * Create a temporary directory and change directory to it.
153 * Create a test file under temporary directory and write some
154 * data into it.
155 */
setup(void)156 void setup(void)
157 {
158 int i;
159 int c, c_total = 0; /* bytes to be written to file */
160 char tst_buff[BUF_SIZE]; /* buffer to hold data */
161
162 tst_sig(NOFORK, DEF_HANDLER, cleanup);
163
164 TEST_PAUSE;
165
166 tst_tmpdir();
167
168 /* Fill the test buffer with the known data */
169 for (i = 0; i < BUF_SIZE; i++) {
170 tst_buff[i] = 'a';
171 }
172
173 /* open a file for reading/writing */
174 fildes = SAFE_OPEN(cleanup, TESTFILE, O_RDWR | O_CREAT, FILE_MODE);
175
176 /* Write to the file 1k data from the buffer */
177 while (c_total < FILE_SIZE) {
178 if ((c = write(fildes, tst_buff, sizeof(tst_buff))) <= 0) {
179 tst_brkm(TBROK | TERRNO, cleanup, "write(%s) failed",
180 TESTFILE);
181 } else {
182 c_total += c;
183 }
184 }
185 }
186
187 /*
188 * void
189 * cleanup() - performs all ONE TIME cleanup for this test at
190 * completion or premature exit.
191 * Close the temporary file.
192 * Remove the test directory and testfile created in the setup.
193 */
cleanup(void)194 void cleanup(void)
195 {
196
197 /* Close the testfile after writing data into it */
198 if (close(fildes) == -1)
199 tst_brkm(TFAIL | TERRNO, NULL, "close(%s) failed", TESTFILE);
200
201 tst_rmdir();
202
203 }
204