source: MondoRescue/trunk/mindi-busybox/coreutils/uname.c@ 904

/* vi: set sw=4 ts=4: */
/* uname -- print system information
   Copyright (C) 1989-1999 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/uname.html */

/* Option       Example

   -s, --sysname    SunOS
   -n, --nodename   rocky8
   -r, --release    4.0
   -v, --version
   -m, --machine    sun
   -a, --all        SunOS rocky8 4.0  sun

   The default behavior is equivalent to `-s'.

   David MacKenzie <djm@gnu.ai.mit.edu> */

/* Busyboxed by Erik Andersen */

/* Further size reductions by Glenn McGrath and Manuel Novoa III. */

/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
 *
 * Now does proper error checking on i/o.  Plus some further space savings.
 */

#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include "busybox.h"

typedef struct {
    struct utsname name;
    char processor[8];          /* for "unknown" */
} uname_info_t;

static const char options[] = "snrvmpa";
static const unsigned short int utsname_offset[] = {
    offsetof(uname_info_t,name.sysname),
    offsetof(uname_info_t,name.nodename),
    offsetof(uname_info_t,name.release),
    offsetof(uname_info_t,name.version),
    offsetof(uname_info_t,name.machine),
    offsetof(uname_info_t,processor)
};

int uname_main(int argc, char **argv)
{
    uname_info_t uname_info;
#if defined(__sparc__) && defined(__linux__)
    char *fake_sparc = getenv("FAKE_SPARC");
#endif
    const unsigned short int *delta;
    char toprint;

    toprint = bb_getopt_ulflags(argc, argv, options);

    if (argc != optind) {
        bb_show_usage();
    }

    if (toprint & (1 << 6)) {
        toprint = 0x3f;
    }

    if (toprint == 0) {
        toprint = 1;            /* sysname */
    }

    if (uname(&uname_info.name) == -1) {
        bb_error_msg_and_die("cannot get system name");
    }

#if defined(__sparc__) && defined(__linux__)
    if ((fake_sparc != NULL)
        && ((fake_sparc[0] == 'y')
            || (fake_sparc[0] == 'Y'))) {
        strcpy(uname_info.name.machine, "sparc");
    }
#endif

    strcpy(uname_info.processor, "unknown");

    delta=utsname_offset;
    do {
        if (toprint & 1) {
            bb_printf(((char *)(&uname_info)) + *delta);
            if (toprint > 1) {
                putchar(' ');
            }
        }
        ++delta;
    } while (toprint >>= 1);
    putchar('\n');

    bb_fflush_stdout_and_exit(EXIT_SUCCESS);
}