75 lines
3.2 KiB
C
75 lines
3.2 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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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; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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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, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/bits/safemacros.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/fmt/fmt.h"
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#include "libc/macros.h"
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#include "libc/nt/enum/formatmessageflags.h"
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#include "libc/nt/process.h"
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#include "libc/nt/runtime.h"
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#include "libc/str/str.h"
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const char *geterrname(int code) {
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extern const char kErrnoNames[];
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const long *e;
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size_t i, n;
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e = &E2BIG;
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n = &EXFULL + 1 - e;
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for (i = 0; i < n; ++i) {
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if (code == e[i]) {
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return IndexDoubleNulString(kErrnoNames, i);
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}
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}
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return NULL;
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}
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/**
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* Converts errno value to string.
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* @return 0 on success, or error code
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*/
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int strerror_r(int err, char *buf, size_t size) {
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const char *s;
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if (err == -1 || IsTiny()) {
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s = "?";
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} else {
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s = firstnonnull(geterrname(err), "?");
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}
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if (!SupportsWindows()) {
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DebugBreak();
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snprintf(buf, size, "E%s[%d]", s, err);
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} else {
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char16_t buf16[100];
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int winstate, sysvstate;
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winstate = GetLastError();
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sysvstate = errno;
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if (FormatMessage(
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kNtFormatMessageFromSystem | kNtFormatMessageIgnoreInserts, NULL,
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err, 0, buf16, ARRAYLEN(buf16) - 1, 0) > 0) {
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chomp16(buf16);
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} else {
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buf16[0] = u'\0';
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}
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snprintf(buf, size, "E%s/err=%d/errno:%d/GetLastError:%d%s%hs", s, err,
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sysvstate, winstate, buf16[0] ? " " : "", buf16);
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}
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return 0;
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}
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