| /* Copyright (C) 1991-2014 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 <stdbool.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/param.h> |
| #include <_itoa.h> |
| |
| /* It is critical here that we always use the `dcgettext' function for |
| the message translation. Since <libintl.h> only defines the macro |
| `dgettext' to use `dcgettext' for optimizing programs this is not |
| always guaranteed. */ |
| #ifndef dgettext |
| # include <locale.h> /* We need LC_MESSAGES. */ |
| # define dgettext(domainname, msgid) dcgettext (domainname, msgid, LC_MESSAGES) |
| #endif |
| |
| /* Return a string describing the errno code in ERRNUM. */ |
| char * |
| __strerror_r (int errnum, char *buf, size_t buflen) |
| { |
| if (__builtin_expect (errnum < 0 || errnum >= _sys_nerr_internal |
| || _sys_errlist_internal[errnum] == NULL, 0)) |
| { |
| /* Buffer we use to print the number in. For a maximum size for |
| `int' of 8 bytes we never need more than 20 digits. */ |
| char numbuf[21]; |
| const char *unk = _("Unknown error "); |
| size_t unklen = strlen (unk); |
| char *p, *q; |
| bool negative = errnum < 0; |
| |
| numbuf[20] = '\0'; |
| p = _itoa_word (abs (errnum), &numbuf[20], 10, 0); |
| |
| /* Now construct the result while taking care for the destination |
| buffer size. */ |
| q = __mempcpy (buf, unk, MIN (unklen, buflen)); |
| if (negative && unklen < buflen) |
| { |
| *q++ = '-'; |
| ++unklen; |
| } |
| if (unklen < buflen) |
| memcpy (q, p, MIN ((size_t) (&numbuf[21] - p), buflen - unklen)); |
| |
| /* Terminate the string in any case. */ |
| if (buflen > 0) |
| buf[buflen - 1] = '\0'; |
| |
| return buf; |
| } |
| |
| return (char *) _(_sys_errlist_internal[errnum]); |
| } |
| weak_alias (__strerror_r, strerror_r) |
| libc_hidden_def (__strerror_r) |
