1 /* Test of strerror_r() function.
2 Copyright (C) 2007-2011 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
22 #include "signature.h"
23 SIGNATURE_CHECK (strerror_r, int, (int, char *, size_t));
35 /* Test results with valid errnum and enough room. */
39 ASSERT (strerror_r (EACCES, buf, sizeof buf) == 0);
40 ASSERT (buf[0] != '\0');
42 ASSERT (strlen (buf) < sizeof buf);
46 ASSERT (strerror_r (ETIMEDOUT, buf, sizeof buf) == 0);
47 ASSERT (buf[0] != '\0');
49 ASSERT (strlen (buf) < sizeof buf);
53 ASSERT (strerror_r (EOVERFLOW, buf, sizeof buf) == 0);
54 ASSERT (buf[0] != '\0');
56 ASSERT (strlen (buf) < sizeof buf);
58 /* POSIX requires strerror (0) to succeed. Reject use of "Unknown
59 error", but allow "Success", "No error", or even Solaris' "Error
60 0" which are distinct patterns from true out-of-range strings.
61 http://austingroupbugs.net/view.php?id=382 */
64 ret = strerror_r (0, buf, sizeof buf);
68 ASSERT (strstr (buf, "nknown") == NULL);
70 /* Test results with out-of-range errnum and enough room. POSIX
71 allows an empty string on success, and allows an unchanged buf on
72 error, but these are not useful, so we guarantee contents. */
75 ret = strerror_r (-3, buf, sizeof buf);
76 ASSERT (ret == 0 || ret == EINVAL);
77 ASSERT (buf[0] != '^');
80 ASSERT (strlen (buf) < sizeof buf);
82 /* Test results with a too small buffer. POSIX requires an error;
83 only ERANGE for 0 and valid errors, and a choice of ERANGE or
84 EINVAL for out-of-range values. On error, POSIX permits buf to
85 be empty, unchanged, or unterminated, but these are not useful,
86 so we guarantee NUL-terminated truncated contents for all but
87 size 0. http://austingroupbugs.net/view.php?id=398 */
89 int errs[] = { EACCES, 0, -3, };
91 for (j = 0; j < SIZEOF (errs); j++)
94 char buf2[sizeof buf] = "";
98 strerror_r (err, buf2, sizeof buf2);
101 for (i = 0; i <= len; i++)
103 strcpy (buf, "BADFACE");
105 ret = strerror_r (err, buf, i);
108 ASSERT (ret == ERANGE || ret == EINVAL);
110 ASSERT (ret == ERANGE);
112 ASSERT (strcmp (buf, "BADFACE") == 0);
115 ASSERT (strncmp (buf, buf2, i - 1) == 0);
116 ASSERT (buf[i - 1] == '\0');
120 strcpy (buf, "BADFACE");
122 ret = strerror_r (err, buf, len + 1);
123 ASSERT (ret != ERANGE);
125 ASSERT (strcmp (buf, buf2) == 0);
130 /* Test that strerror_r does not clobber strerror buffer. On some
131 platforms, this test can only succeed if gnulib also replaces
143 msg1 = strerror (ENOENT);
145 str1 = strdup (msg1);
148 msg2 = strerror (ERANGE);
150 str2 = strdup (msg2);
153 msg3 = strerror (-4);
155 str3 = strdup (msg3);
158 msg4 = strerror (1729576);
160 str4 = strdup (msg4);
163 strerror_r (EACCES, buf, sizeof buf);
164 strerror_r (-5, buf, sizeof buf);
165 ASSERT (msg1 == msg2 || msg1 == msg4 || STREQ (msg1, str1));
166 ASSERT (msg2 == msg4 || STREQ (msg2, str2));
167 ASSERT (msg3 == msg4 || STREQ (msg3, str3));
168 ASSERT (STREQ (msg4, str4));