1/* uname -- Report basic information about the system. Generic version.
2 Copyright (C) 1991-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <string.h>
21#include <sys/utsname.h>
22#include <unistd.h>
23
24/* This file defines UNAME_* to string constants. */
25#include <uname-values.h>
26
27/* Put information about the system in NAME. */
28int
29__uname (struct utsname *name)
30{
31 int save;
32
33 if (name == NULL)
34 {
35 __set_errno (EINVAL);
36 return -1;
37 }
38
39 save = errno;
40 if (__gethostname (name: name->nodename, len: sizeof (name->nodename)) < 0)
41 {
42 if (errno == ENOSYS)
43 {
44 /* Hostname is meaningless for this machine. */
45 name->nodename[0] = '\0';
46 __set_errno (save);
47 }
48#ifdef ENAMETOOLONG
49 else if (errno == ENAMETOOLONG)
50 /* The name was truncated. */
51 __set_errno (save);
52#endif
53 else
54 return -1;
55 }
56 strncpy (name->sysname, UNAME_SYSNAME, sizeof (name->sysname));
57 strncpy (name->release, UNAME_RELEASE, sizeof (name->release));
58 strncpy (name->version, UNAME_VERSION, sizeof (name->version));
59 strncpy (name->machine, UNAME_MACHINE, sizeof (name->machine));
60
61 return 0;
62}
63weak_alias (__uname, uname)
64libc_hidden_def (__uname)
65libc_hidden_def (uname)
66

source code of glibc/posix/uname.c