coreutils/uname.c

   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      The 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      The 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;
 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 }