100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/* vi: set sw=4 ts=4: */
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/* uname -- print system information
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* Copyright (C) 1989-1999 Free Software Foundation, Inc.
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* BB_AUDIT SUSv3 compliant */
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/uname.html */
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/* Option Example
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-s, --sysname SunOS
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-n, --nodename rocky8
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-r, --release 4.0
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-v, --version
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-m, --machine sun
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-a, --all SunOS rocky8 4.0 sun
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The default behavior is equivalent to '-s'.
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David MacKenzie <djm@gnu.ai.mit.edu> */
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/* Busyboxed by Erik Andersen */
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/* Further size reductions by Glenn McGrath and Manuel Novoa III. */
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/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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*
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* Now does proper error checking on i/o. Plus some further space savings.
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*/
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#include <sys/utsname.h>
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#include "libbb.h"
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typedef struct {
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struct utsname name;
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char processor[8]; /* for "unknown" */
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} uname_info_t;
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static const char options[] ALIGN1 = "snrvmpa";
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static const unsigned short utsname_offset[] = {
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offsetof(uname_info_t, name.sysname),
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offsetof(uname_info_t, name.nodename),
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offsetof(uname_info_t, name.release),
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offsetof(uname_info_t, name.version),
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offsetof(uname_info_t, name.machine),
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offsetof(uname_info_t, processor)
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};
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int uname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int uname_main(int argc UNUSED_PARAM, char **argv)
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{
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uname_info_t uname_info;
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#if defined(__sparc__) && defined(__linux__)
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char *fake_sparc = getenv("FAKE_SPARC");
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#endif
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const unsigned short *delta;
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char toprint;
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toprint = getopt32(argv, options);
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if (argv[optind]) { /* coreutils-6.9 compat */
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bb_show_usage();
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}
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if (toprint & (1 << 6)) { /* -a => all opts on */
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toprint = 0x3f;
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}
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if (toprint == 0) { /* no opts => -s (sysname) */
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toprint = 1;
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}
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uname(&uname_info.name); /* never fails */
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#if defined(__sparc__) && defined(__linux__)
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if (fake_sparc && (fake_sparc[0] | 0x20) == 'y') {
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strcpy(uname_info.name.machine, "sparc");
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}
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#endif
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strcpy(uname_info.processor, "unknown");
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delta = utsname_offset;
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do {
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if (toprint & 1) {
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/* printf would not be safe here */
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fputs((char *)(&uname_info) + *delta, stdout);
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if (toprint > 1) {
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bb_putchar(' ');
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}
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}
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++delta;
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} while (toprint >>= 1);
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bb_putchar('\n');
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fflush_stdout_and_exit(EXIT_SUCCESS); /* coreutils-6.9 compat */
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}
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