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 source tree.
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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 | * -s, --sysname SunOS
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13 | * -n, --nodename rocky8
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14 | * -r, --release 4.0
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15 | * -v, --version
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16 | * -m, --machine sun
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17 | * -a, --all SunOS rocky8 4.0 sun
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18 | *
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19 | * The default behavior is equivalent to '-s'.
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20 | *
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21 | * David MacKenzie <djm@gnu.ai.mit.edu>
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22 | *
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23 | * GNU coreutils 6.10:
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24 | * Option: struct Example(s):
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25 | * utsname
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26 | * field:
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27 | * -s, --kernel-name sysname Linux
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28 | * -n, --nodename nodename localhost.localdomain
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29 | * -r, --kernel-release release 2.6.29
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30 | * -v, --kernel-version version #1 SMP Sun Jan 11 20:52:37 EST 2009
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31 | * -m, --machine machine x86_64 i686
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32 | * -p, --processor (none) x86_64 i686
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33 | * -i, --hardware-platform (none) x86_64 i386
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34 | * NB: vanilla coreutils reports "unknown" -p and -i,
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35 | * x86_64 and i686/i386 shown above are Fedora's inventions.
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36 | * -o, --operating-system (none) GNU/Linux
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37 | * -a, --all: all of the above, in the order shown.
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38 | * If -p or -i is not known, don't show them
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39 | */
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40 |
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41 | /* Busyboxed by Erik Andersen
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42 | *
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43 | * Before 2003: Glenn McGrath and Manuel Novoa III
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44 | * Further size reductions.
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45 | * Mar 16, 2003: Manuel Novoa III (mjn3@codepoet.org)
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46 | * Now does proper error checking on i/o. Plus some further space savings.
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47 | * Jan 2009:
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48 | * Fix handling of -a to not print "unknown", add -o and -i support.
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49 | */
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50 |
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51 | #include "libbb.h"
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52 | /* After libbb.h, since it needs sys/types.h on some systems */
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53 | #include <sys/utsname.h>
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54 |
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55 | typedef struct {
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56 | struct utsname name;
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57 | char processor[sizeof(((struct utsname*)NULL)->machine)];
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58 | char platform[sizeof(((struct utsname*)NULL)->machine)];
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59 | char os[sizeof("GNU/Linux")];
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60 | } uname_info_t;
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61 |
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62 | static const char options[] ALIGN1 = "snrvmpioa";
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63 | static const unsigned short utsname_offset[] = {
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64 | offsetof(uname_info_t, name.sysname), /* -s */
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65 | offsetof(uname_info_t, name.nodename), /* -n */
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66 | offsetof(uname_info_t, name.release), /* -r */
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67 | offsetof(uname_info_t, name.version), /* -v */
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68 | offsetof(uname_info_t, name.machine), /* -m */
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69 | offsetof(uname_info_t, processor), /* -p */
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70 | offsetof(uname_info_t, platform), /* -i */
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71 | offsetof(uname_info_t, os), /* -o */
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72 | };
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73 |
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74 | int uname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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75 | int uname_main(int argc UNUSED_PARAM, char **argv)
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76 | {
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77 | #if ENABLE_LONG_OPTS
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78 | static const char uname_longopts[] ALIGN1 =
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79 | /* name, has_arg, val */
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80 | "all\0" No_argument "a"
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81 | "kernel-name\0" No_argument "s"
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82 | "nodename\0" No_argument "n"
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83 | "kernel-release\0" No_argument "r"
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84 | "release\0" No_argument "r"
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85 | "kernel-version\0" No_argument "v"
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86 | "machine\0" No_argument "m"
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87 | "processor\0" No_argument "p"
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88 | "hardware-platform\0" No_argument "i"
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89 | "operating-system\0" No_argument "o"
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90 | ;
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91 | #endif
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92 | uname_info_t uname_info;
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93 | #if defined(__sparc__) && defined(__linux__)
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94 | char *fake_sparc = getenv("FAKE_SPARC");
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95 | #endif
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96 | const char *unknown_str = "unknown";
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97 | const char *fmt;
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98 | const unsigned short *delta;
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99 | unsigned toprint;
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100 |
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101 | IF_LONG_OPTS(applet_long_options = uname_longopts);
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102 | toprint = getopt32(argv, options);
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103 |
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104 | if (argv[optind]) { /* coreutils-6.9 compat */
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105 | bb_show_usage();
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106 | }
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107 |
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108 | if (toprint & (1 << 8)) { /* -a => all opts on */
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109 | toprint = (1 << 8) - 1;
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110 | unknown_str = ""; /* -a does not print unknown fields */
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111 | }
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112 |
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113 | if (toprint == 0) { /* no opts => -s (sysname) */
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114 | toprint = 1;
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115 | }
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116 |
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117 | uname(&uname_info.name); /* never fails */
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118 |
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119 | #if defined(__sparc__) && defined(__linux__)
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120 | if (fake_sparc && (fake_sparc[0] | 0x20) == 'y') {
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121 | strcpy(uname_info.name.machine, "sparc");
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122 | }
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123 | #endif
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124 | strcpy(uname_info.processor, unknown_str);
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125 | strcpy(uname_info.platform, unknown_str);
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126 | strcpy(uname_info.os, "GNU/Linux");
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127 | #if 0
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128 | /* Fedora does something like this */
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129 | strcpy(uname_info.processor, uname_info.name.machine);
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130 | strcpy(uname_info.platform, uname_info.name.machine);
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131 | if (uname_info.platform[0] == 'i'
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132 | && uname_info.platform[1]
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133 | && uname_info.platform[2] == '8'
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134 | && uname_info.platform[3] == '6'
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135 | ) {
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136 | uname_info.platform[1] = '3';
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137 | }
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138 | #endif
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139 |
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140 | delta = utsname_offset;
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141 | fmt = " %s" + 1;
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142 | do {
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143 | if (toprint & 1) {
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144 | const char *p = (char *)(&uname_info) + *delta;
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145 | if (p[0]) {
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146 | printf(fmt, p);
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147 | fmt = " %s";
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148 | }
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149 | }
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150 | ++delta;
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151 | } while (toprint >>= 1);
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152 | bb_putchar('\n');
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153 |
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154 | fflush_stdout_and_exit(EXIT_SUCCESS); /* coreutils-6.9 compat */
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155 | }
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