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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/struct/utsname.h"
#include "libc/str/str.h"
/**
* Asks kernel to give us the `uname -a` data.
* @return 0 on success, or -1 w/ errno
*/
int uname(struct utsname *lool) {
char *out;
size_t i, j, len;
char tmp[sizeof(struct utsname)];
memset(tmp, 0, sizeof(tmp));
if (uname$sysv(tmp) != -1) {
out = (char *)lool;
i = 0;
j = 0;
for (;;) {
len = strlen(&tmp[j]);
if (len >= sizeof(struct utsname) - i) break;
memcpy(&out[i], &tmp[j], len + 1);
i += SYS_NMLN;
j += len;
while (j < sizeof(tmp) && tmp[j] == '\0') ++j;
if (j == sizeof(tmp)) break;
}
return 0;
} else {
memset(lool, 0, sizeof(struct utsname));
return -1;
}
}