59 lines
2.9 KiB
C
59 lines
2.9 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/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/struct/utsname.h"
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#include "libc/dce.h"
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#include "libc/macros.h"
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#include "libc/nt/enum/computernameformat.h"
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#include "libc/nt/errors.h"
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#include "libc/nt/runtime.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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/**
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* Returns name of host system, e.g.
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*
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* pheidippides.domain.example
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* ^^^^^^^^^^^^
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*/
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int gethostname(char *name, size_t len) {
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uint32_t nSize;
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char16_t name16[256];
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struct utsname u;
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if (len < 1) return einval();
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if (!name) return efault();
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if (!IsWindows()) {
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if (uname(&u) == -1) return -1;
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if (!memccpy(name, u.nodename, '\0', len)) {
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name[len - 1] = '\0';
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}
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return 0;
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} else {
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nSize = ARRAYLEN(name16);
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if (!GetComputerNameEx(kNtComputerNameDnsHostname, name16, &nSize)) {
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return winerr();
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}
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tprecode16to8(name, MIN(MIN(ARRAYLEN(name16), nSize + 1), len), name16);
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return 0;
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}
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}
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