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74 lines
3.2 KiB
74 lines
3.2 KiB
/*-*- 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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