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-rw-r--r--coreutils/uname.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/coreutils/uname.c b/coreutils/uname.c
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1/* vi: set sw=4 ts=4: */
2/* uname -- print system information
3 * Copyright (C) 1989-1999 Free Software Foundation, Inc.
4 *
5 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
6 */
7
8/* BB_AUDIT SUSv3 compliant */
9/* http://www.opengroup.org/onlinepubs/007904975/utilities/uname.html */
10
11/* Option Example
12
13 -s, --sysname SunOS
14 -n, --nodename rocky8
15 -r, --release 4.0
16 -v, --version
17 -m, --machine sun
18 -a, --all SunOS rocky8 4.0 sun
19
20 The default behavior is equivalent to `-s'.
21
22 David MacKenzie <djm@gnu.ai.mit.edu> */
23
24/* Busyboxed by Erik Andersen */
25
26/* Further size reductions by Glenn McGrath and Manuel Novoa III. */
27
28/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
29 *
30 * Now does proper error checking on i/o. Plus some further space savings.
31 */
32
33#include <stdio.h>
34#include <stdlib.h>
35#include <stddef.h>
36#include <string.h>
37#include <unistd.h>
38#include <sys/types.h>
39#include <sys/utsname.h>
40#include "busybox.h"
41
42typedef struct {
43 struct utsname name;
44 char processor[8]; /* for "unknown" */
45} uname_info_t;
46
47static const char options[] = "snrvmpa";
48static const unsigned short int utsname_offset[] = {
49 offsetof(uname_info_t,name.sysname),
50 offsetof(uname_info_t,name.nodename),
51 offsetof(uname_info_t,name.release),
52 offsetof(uname_info_t,name.version),
53 offsetof(uname_info_t,name.machine),
54 offsetof(uname_info_t,processor)
55};
56
57int uname_main(int argc, char **argv)
58{
59 uname_info_t uname_info;
60#if defined(__sparc__) && defined(__linux__)
61 char *fake_sparc = getenv("FAKE_SPARC");
62#endif
63 const unsigned short int *delta;
64 char toprint;
65
66 toprint = getopt32(argc, argv, options);
67
68 if (argc != optind) {
69 bb_show_usage();
70 }
71
72 if (toprint & (1 << 6)) {
73 toprint = 0x3f;
74 }
75
76 if (toprint == 0) {
77 toprint = 1; /* sysname */
78 }
79
80 if (uname(&uname_info.name) == -1) {
81 bb_error_msg_and_die("cannot get system name");
82 }
83
84#if defined(__sparc__) && defined(__linux__)
85 if ((fake_sparc != NULL)
86 && ((fake_sparc[0] == 'y')
87 || (fake_sparc[0] == 'Y'))) {
88 strcpy(uname_info.name.machine, "sparc");
89 }
90#endif
91
92 strcpy(uname_info.processor, "unknown");
93
94 delta = utsname_offset;
95 do {
96 if (toprint & 1) {
97 printf(((char *)(&uname_info)) + *delta);
98 if (toprint > 1) {
99 putchar(' ');
100 }
101 }
102 ++delta;
103 } while (toprint >>= 1);
104 putchar('\n');
105
106 fflush_stdout_and_exit(EXIT_SUCCESS);
107}