From e0023883c6d2e6745a19e4b48e186ed156c1fca8 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:19:27 +0200 Subject: Adding upstream version 2.11.2. Signed-off-by: Daniel Baumann --- gl/lib/strerror.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 gl/lib/strerror.c (limited to 'gl/lib/strerror.c') diff --git a/gl/lib/strerror.c b/gl/lib/strerror.c new file mode 100644 index 0000000..67c5216 --- /dev/null +++ b/gl/lib/strerror.c @@ -0,0 +1,71 @@ +/* strerror.c --- POSIX compatible system error routine + + Copyright (C) 2007-2022 Free Software Foundation, Inc. + + This file 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. + + This file 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 this program. If not, see . */ + +#include + +/* Specification. */ +#include + +#include +#include +#include +#include + +#include "intprops.h" +#include "strerror-override.h" +#include "verify.h" + +/* Use the system functions, not the gnulib overrides in this file. */ +#undef sprintf + +char * +strerror (int n) +#undef strerror +{ + static char buf[STACKBUF_LEN]; + size_t len; + + /* Cast away const, due to the historical signature of strerror; + callers should not be modifying the string. */ + const char *msg = strerror_override (n); + if (msg) + return (char *) msg; + + msg = strerror (n); + + /* Our strerror_r implementation might use the system's strerror + buffer, so all other clients of strerror have to see the error + copied into a buffer that we manage. This is not thread-safe, + even if the system strerror is, but portable programs shouldn't + be using strerror if they care about thread-safety. */ + if (!msg || !*msg) + { + static char const fmt[] = "Unknown error %d"; + verify (sizeof buf >= sizeof (fmt) + INT_STRLEN_BOUND (n)); + sprintf (buf, fmt, n); + errno = EINVAL; + return buf; + } + + /* Fix STACKBUF_LEN if this ever aborts. */ + len = strlen (msg); + if (sizeof buf <= len) + abort (); + + memcpy (buf, msg, len + 1); + return buf; +} -- cgit v1.2.3