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    Contents of /tags/mkinitrd-6.1.5/busybox/coreutils/uname.c

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    Revision 898 - (show annotations) (download)
    Wed Aug 5 17:52:14 2009 UTC (14 years, 10 months ago) by niro
    File MIME type: text/plain
    File size: 2383 byte(s) 
    tagged 'mkinitrd-6.1.5'
    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 <sys/utsname.h>
    34 #include "libbb.h"
    35
    36 typedef struct {
    37 struct utsname name;
    38 char processor[8]; /* for "unknown" */
    39 } uname_info_t;
    40
    41 static const char options[] ALIGN1 = "snrvmpa";
    42 static const unsigned short utsname_offset[] = {
    43 offsetof(uname_info_t, name.sysname),
    44 offsetof(uname_info_t, name.nodename),
    45 offsetof(uname_info_t, name.release),
    46 offsetof(uname_info_t, name.version),
    47 offsetof(uname_info_t, name.machine),
    48 offsetof(uname_info_t, processor)
    49 };
    50
    51 int uname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    52 int uname_main(int argc UNUSED_PARAM, char **argv)
    53 {
    54 uname_info_t uname_info;
    55 #if defined(__sparc__) && defined(__linux__)
    56 char *fake_sparc = getenv("FAKE_SPARC");
    57 #endif
    58 const unsigned short *delta;
    59 char toprint;
    60
    61 toprint = getopt32(argv, options);
    62
    63 if (argv[optind]) { /* coreutils-6.9 compat */
    64 bb_show_usage();
    65 }
    66
    67 if (toprint & (1 << 6)) { /* -a => all opts on */
    68 toprint = 0x3f;
    69 }
    70
    71 if (toprint == 0) { /* no opts => -s (sysname) */
    72 toprint = 1;
    73 }
    74
    75 uname(&uname_info.name); /* never fails */
    76
    77 #if defined(__sparc__) && defined(__linux__)
    78 if (fake_sparc && (fake_sparc[0] | 0x20) == 'y') {
    79 strcpy(uname_info.name.machine, "sparc");
    80 }
    81 #endif
    82
    83 strcpy(uname_info.processor, "unknown");
    84
    85 delta = utsname_offset;
    86 do {
    87 if (toprint & 1) {
    88 /* printf would not be safe here */
    89 fputs((char *)(&uname_info) + *delta, stdout);
    90 if (toprint > 1) {
    91 bb_putchar(' ');
    92 }
    93 }
    94 ++delta;
    95 } while (toprint >>= 1);
    96 bb_putchar('\n');
    97
    98 fflush_stdout_and_exit(EXIT_SUCCESS); /* coreutils-6.9 compat */
    99 }