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88592a2880
* lib/string.in.h (strerror): Change the return type to 'const char *'. (GNULIB_defined_strerror): New macro. * lib/strerror.c (strerror): Change the return type to 'const char *'. * lib/strerror_l.c (errno_string_callback): Change a variable from 'char *' to 'const char *'. * lib/strerror_r.c (strerror_r): Likewise. * doc/posix-functions/strerror.texi: Document that Gnulib uses the return type 'const char *'. * NEWS: Mention the change. * m4/perror.m4 (gl_FUNC_PERROR): Change a variable from 'char *' to 'const char *'. * m4/strerror.m4 (gl_FUNC_STRERROR_0): Likewise. * m4/strerror_r.m4 (gl_FUNC_STRERROR_R_WORKS): Likewise. * tests/test-strerror.c (strerror): Update expected signature. (main): Change a variable from 'char *' to 'const char *'. * tests/test-string-h-c++.cc (GNULIB_NAMESPACE::strerror): Update expected signature.
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/* Test of strerror() function.
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Copyright (C) 2007-2026 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <https://www.gnu.org/licenses/>. */
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/* Written by Eric Blake <ebb9@byu.net>, 2007. */
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#include <config.h>
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#include <string.h>
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#include "signature.h"
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#if GNULIB_defined_strerror
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SIGNATURE_CHECK (strerror, const char *, (int));
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#else
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SIGNATURE_CHECK (strerror, char *, (int));
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#endif
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#include <errno.h>
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#include "macros.h"
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int
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main (void)
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{
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const char *str;
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errno = 0;
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str = strerror (EACCES);
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ASSERT (str);
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ASSERT (*str);
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ASSERT (errno == 0);
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errno = 0;
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str = strerror (ETIMEDOUT);
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ASSERT (str);
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ASSERT (*str);
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ASSERT (errno == 0);
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errno = 0;
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str = strerror (EOVERFLOW);
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ASSERT (str);
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ASSERT (*str);
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ASSERT (errno == 0);
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/* POSIX requires strerror (0) to succeed. Reject use of "Unknown
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error", but allow "Success", "No error", or even Solaris' "Error
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0" which are distinct patterns from true out-of-range strings.
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https://austingroupbugs.net/view.php?id=382 */
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errno = 0;
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str = strerror (0);
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ASSERT (str);
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ASSERT (*str);
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ASSERT (errno == 0);
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ASSERT (strstr (str, "nknown") == NULL);
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ASSERT (strstr (str, "ndefined") == NULL);
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/* POSIX requires strerror to produce a non-NULL result for all
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inputs; as an extension, we also guarantee a non-empty result.
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Reporting EINVAL is optional. */
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errno = 0;
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str = strerror (-3);
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ASSERT (str);
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ASSERT (*str);
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ASSERT (errno == 0 || errno == EINVAL);
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return test_exit_status;
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}
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