1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *  linux/init/version.c
4  *
5  *  Copyright (C) 1992  Theodore Ts'o
6  *
7  *  May be freely distributed as part of Linux.
8  */
9 
10 #include <generated/compile.h>
11 #include <linux/build-salt.h>
12 #include <linux/elfnote-lto.h>
13 #include <linux/export.h>
14 #include <linux/init.h>
15 #include <linux/printk.h>
16 #include <linux/uts.h>
17 #include <linux/utsname.h>
18 #include <linux/proc_ns.h>
19 
early_hostname(char * arg)20 static int __init early_hostname(char *arg)
21 {
22 	size_t bufsize = sizeof(init_uts_ns.name.nodename);
23 	size_t maxlen  = bufsize - 1;
24 	size_t arglen;
25 
26 	arglen = strlcpy(init_uts_ns.name.nodename, arg, bufsize);
27 	if (arglen > maxlen) {
28 		pr_warn("hostname parameter exceeds %zd characters and will be truncated",
29 			maxlen);
30 	}
31 	return 0;
32 }
33 early_param("hostname", early_hostname);
34 
35 const char linux_proc_banner[] =
36 	"%s version %s"
37 	" (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ")"
38 	" (" LINUX_COMPILER ") %s\n";
39 
40 BUILD_SALT;
41 BUILD_LTO_INFO;
42 
43 /*
44  * init_uts_ns and linux_banner contain the build version and timestamp,
45  * which are really fixed at the very last step of build process.
46  * They are compiled with __weak first, and without __weak later.
47  */
48 
49 struct uts_namespace init_uts_ns __weak;
50 const char linux_banner[] __weak;
51 
52 #include "version-timestamp.c"
53 
54 EXPORT_SYMBOL_GPL(init_uts_ns);
55