53 lines
2.7 KiB
C
53 lines
2.7 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/str/str.h"
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/**
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* Asks kernel to give us the `uname -a` data.
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* @return 0 on success, or -1 w/ errno
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*/
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int uname(struct utsname *lool) {
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char *out;
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size_t i, j, len;
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char tmp[sizeof(struct utsname)];
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memset(tmp, 0, sizeof(tmp));
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if (uname$sysv(tmp) != -1) {
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out = (char *)lool;
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i = 0;
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j = 0;
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for (;;) {
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len = strlen(&tmp[j]);
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if (len >= sizeof(struct utsname) - i) break;
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memcpy(&out[i], &tmp[j], len + 1);
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i += SYS_NMLN;
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j += len;
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while (j < sizeof(tmp) && tmp[j] == '\0') ++j;
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if (j == sizeof(tmp)) break;
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}
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return 0;
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} else {
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memset(lool, 0, sizeof(struct utsname));
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return -1;
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}
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}
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