1 /* vi: set sw=4 ts=4: */
2 /*
3  * uname -- print system information
4  * Copyright (C) 1989-1999 Free Software Foundation, Inc.
5  *
6  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
7  */
8 /* Option		Example
9  * -s, --sysname	SunOS
10  * -n, --nodename	rocky8
11  * -r, --release	4.0
12  * -v, --version
13  * -m, --machine	sun
14  * -a, --all		SunOS rocky8 4.0  sun
15  *
16  * The default behavior is equivalent to '-s'.
17  *
18  * David MacKenzie <djm@gnu.ai.mit.edu>
19  *
20  * GNU coreutils 6.10:
21  * Option:                      struct   Example(s):
22  *                              utsname
23  *                              field:
24  * -s, --kernel-name            sysname  Linux
25  * -n, --nodename               nodename localhost.localdomain
26  * -r, --kernel-release         release  2.6.29
27  * -v, --kernel-version         version  #1 SMP Sun Jan 11 20:52:37 EST 2009
28  * -m, --machine                machine  x86_64   i686
29  * -p, --processor              (none)   x86_64   i686
30  * -i, --hardware-platform      (none)   x86_64   i386
31  *      NB: vanilla coreutils reports "unknown" -p and -i,
32  *      x86_64 and i686/i386 shown above are Fedora's inventions.
33  * -o, --operating-system       (none)   GNU/Linux
34  * -a, --all: all of the above, in the order shown.
35  *      If -p or -i is not known, don't show them
36  */
37 /* Busyboxed by Erik Andersen
38  *
39  * Before 2003: Glenn McGrath and Manuel Novoa III
40  *  Further size reductions.
41  * Mar 16, 2003: Manuel Novoa III (mjn3@codepoet.org)
42  *  Now does proper error checking on i/o.  Plus some further space savings.
43  * Jan 2009:
44  *  Fix handling of -a to not print "unknown", add -o and -i support.
45  */
46 //config:config UNAME
47 //config:	bool "uname (3.9 kb)"
48 //config:	default y
49 //config:	help
50 //config:	uname is used to print system information.
51 //config:
52 //config:config UNAME_OSNAME
53 //config:	string "Operating system name"
54 //config:	default "GNU/Linux"
55 //config:	depends on UNAME
56 //config:	help
57 //config:	Sets the operating system name reported by uname -o.  The
58 //config:	default is "GNU/Linux".
59 //config:
60 //can't use "ARCH" for this applet, all hell breaks loose in build system :)
61 //config:config BB_ARCH
62 //config:	bool "arch (1.1 kb)"
63 //config:	default y
64 //config:	help
65 //config:	Same as uname -m.
66 
67 //                  APPLET_NOFORK:name   main   location    suid_type     help
68 //applet:IF_UNAME(APPLET_NOFORK(  uname, uname, BB_DIR_BIN, BB_SUID_DROP, uname))
69 //applet:IF_BB_ARCH(APPLET_NOFORK(arch,  uname, BB_DIR_BIN, BB_SUID_DROP, arch))
70 
71 //kbuild:lib-$(CONFIG_UNAME)   += uname.o
72 //kbuild:lib-$(CONFIG_BB_ARCH) += uname.o
73 
74 /* BB_AUDIT SUSv3 compliant */
75 /* http://www.opengroup.org/onlinepubs/007904975/utilities/uname.html */
76 
77 //usage:#define uname_trivial_usage
78 //usage:       "[-amnrspvio]"
79 //usage:#define uname_full_usage "\n\n"
80 //usage:       "Print system information\n"
81 //usage:     "\n	-a	Print all"
82 //usage:     "\n	-m	Machine (hardware) type"
83 //usage:     "\n	-n	Hostname"
84 //usage:     "\n	-r	Kernel release"
85 //usage:     "\n	-s	Kernel name (default)"
86 //usage:     "\n	-p	Processor type"
87 //usage:     "\n	-v	Kernel version"
88 //usage:     "\n	-i	Hardware platform"
89 //usage:     "\n	-o	OS name"
90 //usage:
91 //usage:#define uname_example_usage
92 //usage:       "$ uname -a\n"
93 //usage:       "Linux debian 2.4.23 #2 Tue Dec 23 17:09:10 MST 2003 i686 GNU/Linux\n"
94 
95 //usage:#define arch_trivial_usage
96 //usage:       ""
97 //usage:#define arch_full_usage "\n\n"
98 //usage:       "Print system architecture"
99 
100 #include "libbb.h"
101 /* After libbb.h, since it needs sys/types.h on some systems */
102 #include <sys/utsname.h>
103 
104 typedef struct {
105 	struct utsname name;
106 	char processor[sizeof(((struct utsname*)NULL)->machine)];
107 	char platform[sizeof(((struct utsname*)NULL)->machine)];
108 	char os[sizeof(CONFIG_UNAME_OSNAME)];
109 } uname_info_t;
110 
111 #if ENABLE_UNAME
112 #define options "snrvmpioa"
113 static const unsigned short utsname_offset[] = {
114 	offsetof(uname_info_t, name.sysname), /* -s */
115 	offsetof(uname_info_t, name.nodename), /* -n */
116 	offsetof(uname_info_t, name.release), /* -r */
117 	offsetof(uname_info_t, name.version), /* -v */
118 	offsetof(uname_info_t, name.machine), /* -m */
119 	offsetof(uname_info_t, processor), /* -p */
120 	offsetof(uname_info_t, platform), /* -i */
121 	offsetof(uname_info_t, os), /* -o */
122 };
123 #endif
124 
125 int uname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
uname_main(int argc UNUSED_PARAM,char ** argv UNUSED_PARAM)126 int uname_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
127 {
128 	uname_info_t uname_info;
129 	IF_UNAME(const char *unknown_str = "unknown";)
130 #if ENABLE_UNAME
131 	unsigned toprint = (1 << 4); /* "arch" = "uname -m" */
132 
133 	if (!ENABLE_BB_ARCH || applet_name[0] == 'u') {
134 # if ENABLE_LONG_OPTS
135 		static const char uname_longopts[] ALIGN1 =
136 			/* name, has_arg, val */
137 			"all\0"               No_argument       "a"
138 			"kernel-name\0"       No_argument       "s"
139 			"nodename\0"          No_argument       "n"
140 			"kernel-release\0"    No_argument       "r"
141 			"release\0"           No_argument       "r"
142 			"kernel-version\0"    No_argument       "v"
143 			"machine\0"           No_argument       "m"
144 			"processor\0"         No_argument       "p"
145 			"hardware-platform\0" No_argument       "i"
146 			"operating-system\0"  No_argument       "o"
147 		;
148 # endif
149 		toprint = getopt32long(argv, options, uname_longopts);
150 		if (argv[optind]) { /* coreutils-6.9 compat */
151 			bb_show_usage();
152 		}
153 		if (toprint & (1 << 8)) { /* -a => all opts on */
154 			toprint = (1 << 8) - 1;
155 			unknown_str = ""; /* -a does not print unknown fields */
156 		}
157 		if (toprint == 0) { /* no opts => -s (sysname) */
158 			toprint = 1;
159 		}
160 	} /* if "uname" */
161 #endif
162 
163 	uname(&uname_info.name); /* never fails */
164 
165 #if defined(__sparc__) && defined(__linux__)
166 	{
167 		char *fake_sparc = getenv("FAKE_SPARC");
168 		if (fake_sparc && (fake_sparc[0] | 0x20) == 'y') {
169 			strcpy(uname_info.name.machine, "sparc");
170 		}
171 	}
172 #endif
173 	if (ENABLE_BB_ARCH && (!ENABLE_UNAME || applet_name[0] == 'a')) {
174 		puts(uname_info.name.machine);
175 	} else {
176 #if ENABLE_UNAME
177 		/* "uname" */
178 		const char *fmt;
179 		const unsigned short *delta;
180 
181 		strcpy(uname_info.processor, unknown_str);
182 		strcpy(uname_info.platform, unknown_str);
183 		strcpy(uname_info.os, CONFIG_UNAME_OSNAME);
184 # if ENABLE_FEDORA_COMPAT
185 		/* Fedora does something like this */
186 		strcpy(uname_info.processor, uname_info.name.machine);
187 		strcpy(uname_info.platform, uname_info.name.machine);
188 		if (uname_info.platform[0] == 'i'
189 		 && uname_info.platform[1]
190 		 && uname_info.platform[2] == '8'
191 		 && uname_info.platform[3] == '6'
192 		) {
193 			uname_info.platform[1] = '3';
194 		}
195 # endif
196 		delta = utsname_offset;
197 		fmt = " %s" + 1;
198 		do {
199 			if (toprint & 1) {
200 				const char *p = (char *)(&uname_info) + *delta;
201 				if (p[0]) {
202 					printf(fmt, p);
203 					fmt = " %s";
204 				}
205 			}
206 			++delta;
207 		} while (toprint >>= 1);
208 		bb_putchar('\n');
209 #endif
210 	}
211 
212 	fflush_stdout_and_exit(EXIT_SUCCESS); /* coreutils-6.9 compat */
213 }
214