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 -*-│
|
||
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
||
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
||
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
||
|
|
│ │
|
||
|
|
│ This program is free software; you can redistribute it and/or modify │
|
||
|
|
│ it under the terms of the GNU General Public License as published by │
|
||
|
|
│ the Free Software Foundation; version 2 of the License. │
|
||
|
|
│ │
|
||
|
|
│ This program is distributed in the hope that it will be useful, but │
|
||
|
|
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
|
||
|
|
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
|
||
|
|
│ General Public License for more details. │
|
||
|
|
│ │
|
||
|
|
│ You should have received a copy of the GNU General Public License │
|
||
|
|
│ along with this program; if not, write to the Free Software │
|
||
|
|
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
|
||
|
|
│ 02110-1301 USA │
|
||
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
||
|
|
#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;
|
||
|
|
}
|
||
|
|
}
|