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Diffstat (limited to 'REORG.TODO/string/strerror.c')
-rw-r--r-- | REORG.TODO/string/strerror.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/REORG.TODO/string/strerror.c b/REORG.TODO/string/strerror.c new file mode 100644 index 0000000000..0d235c6b6b --- /dev/null +++ b/REORG.TODO/string/strerror.c @@ -0,0 +1,43 @@ +/* Copyright (C) 1991-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <libintl.h> +#include <stdio.h> +#include <string.h> +#include <errno.h> + +/* Return a string describing the errno code in ERRNUM. + The storage is good only until the next call to strerror. + Writing to the storage causes undefined behavior. */ +libc_freeres_ptr (static char *buf); + +char * +strerror (int errnum) +{ + char *ret = __strerror_r (errnum, NULL, 0); + int saved_errno; + + if (__glibc_likely (ret != NULL)) + return ret; + saved_errno = errno; + if (buf == NULL) + buf = malloc (1024); + __set_errno (saved_errno); + if (buf == NULL) + return _("Unknown error"); + return __strerror_r (errnum, buf, 1024); +} |