mirror of
https://github.com/jart/cosmopolitan.git
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46 lines
2.5 KiB
C
46 lines
2.5 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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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/macros.internal.h"
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#include "libc/nt/enum/computernameformat.h"
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#include "libc/nt/systeminfo.h"
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#include "libc/str/str.h"
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#include "libc/sysv/errfuns.h"
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// Guarantees NUL-terminator, if zero is returned.
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// Mutates on ENAMETOOLONG without nul-terminator.
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textwindows int gethostname_nt(char *name, size_t len, int kind) {
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uint32_t nSize;
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char name8[256];
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char16_t name16[256];
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nSize = ARRAYLEN(name16);
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if (GetComputerNameEx(kind, name16, &nSize)) {
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tprecode16to8(name8, sizeof(name8), name16);
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if (memccpy(name, name8, '\0', len)) {
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return 0;
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} else {
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return enametoolong();
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}
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return 0;
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} else {
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return __winerr();
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}
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}
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