1 | /* vi: set sw=4 ts=4: */
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2 | /* uname -- print system information
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3 | * Copyright (C) 1989-1999 Free Software Foundation, Inc.
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4 | *
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5 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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6 | */
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7 |
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8 | /* BB_AUDIT SUSv3 compliant */
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9 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/uname.html */
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10 |
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11 | /* Option Example
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12 |
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13 | -s, --sysname SunOS
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14 | -n, --nodename rocky8
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15 | -r, --release 4.0
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16 | -v, --version
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17 | -m, --machine sun
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18 | -a, --all SunOS rocky8 4.0 sun
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19 |
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20 | The default behavior is equivalent to `-s'.
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21 |
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22 | David MacKenzie <djm@gnu.ai.mit.edu> */
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23 |
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24 | /* Busyboxed by Erik Andersen */
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25 |
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26 | /* Further size reductions by Glenn McGrath and Manuel Novoa III. */
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27 |
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28 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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29 | *
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30 | * Now does proper error checking on i/o. Plus some further space savings.
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31 | */
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32 |
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33 | #include <sys/utsname.h>
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34 | #include "libbb.h"
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35 |
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36 | typedef struct {
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37 | struct utsname name;
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38 | char processor[8]; /* for "unknown" */
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39 | } uname_info_t;
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40 |
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41 | static const char options[] ALIGN1 = "snrvmpa";
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42 | static const unsigned short utsname_offset[] ALIGN2 = {
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43 | offsetof(uname_info_t,name.sysname),
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44 | offsetof(uname_info_t,name.nodename),
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45 | offsetof(uname_info_t,name.release),
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46 | offsetof(uname_info_t,name.version),
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47 | offsetof(uname_info_t,name.machine),
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48 | offsetof(uname_info_t,processor)
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49 | };
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50 |
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51 | int uname_main(int argc, char **argv);
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52 | int uname_main(int argc, char **argv)
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53 | {
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54 | uname_info_t uname_info;
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55 | #if defined(__sparc__) && defined(__linux__)
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56 | char *fake_sparc = getenv("FAKE_SPARC");
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57 | #endif
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58 | const unsigned short int *delta;
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59 | char toprint;
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60 |
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61 | toprint = getopt32(argv, options);
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62 |
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63 | if (argc != optind) {
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64 | bb_show_usage();
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65 | }
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66 |
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67 | if (toprint & (1 << 6)) {
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68 | toprint = 0x3f;
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69 | }
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70 |
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71 | if (toprint == 0) {
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72 | toprint = 1; /* sysname */
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73 | }
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74 |
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75 | if (uname(&uname_info.name) == -1) {
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76 | bb_error_msg_and_die("cannot get system name");
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77 | }
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78 |
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79 | #if defined(__sparc__) && defined(__linux__)
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80 | if ((fake_sparc != NULL)
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81 | && ((fake_sparc[0] == 'y')
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82 | || (fake_sparc[0] == 'Y'))) {
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83 | strcpy(uname_info.name.machine, "sparc");
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84 | }
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85 | #endif
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86 |
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87 | strcpy(uname_info.processor, "unknown");
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88 |
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89 | delta = utsname_offset;
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90 | do {
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91 | if (toprint & 1) {
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92 | printf(((char *)(&uname_info)) + *delta);
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93 | if (toprint > 1) {
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94 | putchar(' ');
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95 | }
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96 | }
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97 | ++delta;
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98 | } while (toprint >>= 1);
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99 | putchar('\n');
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100 |
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101 | fflush_stdout_and_exit(EXIT_SUCCESS);
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102 | }
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