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/* uname -- print system information
Copyright (C) 1989, 1991 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* 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> */
#include <stdio.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <getopt.h>
#include "system.h"
#include "version.h"
void error ();
static void print_element ();
static void usage ();
/* Values that are bitwise or'd into `toprint'. */
/* Operating system name. */
#define PRINT_SYSNAME 1
/* Node name on a communications network. */
#define PRINT_NODENAME 2
/* Operating system release. */
#define PRINT_RELEASE 4
/* Operating system version. */
#define PRINT_VERSION 8
/* Machine hardware name. */
#define PRINT_MACHINE 16
/* Mask indicating which elements of the name to print. */
static unsigned char toprint;
/* The name this program was run with, for error messages. */
char *program_name;
/* If non-zero, display usage information and exit. */
static int show_help;
/* If non-zero, print the version on standard output and exit. */
static int show_version;
static struct option const long_options[] =
{
{"help", no_argument, &show_help, 1},
{"machine", no_argument, NULL, 'm'},
{"nodename", no_argument, NULL, 'n'},
{"release", no_argument, NULL, 'r'},
{"sysname", no_argument, NULL, 's'},
{"version", no_argument, &show_version, 1},
{"all", no_argument, NULL, 'a'},
{NULL, 0, NULL, 0}
};
void
main (argc, argv)
int argc;
char **argv;
{
struct utsname name;
int c;
program_name = argv[0];
toprint = 0;
while ((c = getopt_long (argc, argv, "snrvma", long_options, (int *) 0))
!= EOF)
{
switch (c)
{
case 0:
break;
case 's':
toprint |= PRINT_SYSNAME;
break;
case 'n':
toprint |= PRINT_NODENAME;
break;
case 'r':
toprint |= PRINT_RELEASE;
break;
case 'v':
toprint |= PRINT_VERSION;
break;
case 'm':
toprint |= PRINT_MACHINE;
break;
case 'a':
toprint = PRINT_SYSNAME | PRINT_NODENAME | PRINT_RELEASE |
PRINT_VERSION | PRINT_MACHINE;
break;
default:
usage ();
}
}
if (show_version)
{
printf ("%s\n", version_string);
exit (0);
}
if (show_help)
usage ();
if (optind != argc)
usage ();
if (toprint == 0)
toprint = PRINT_SYSNAME;
if (uname (&name) == -1)
error (1, errno, "cannot get system name");
print_element (PRINT_SYSNAME, name.sysname);
print_element (PRINT_NODENAME, name.nodename);
print_element (PRINT_RELEASE, name.release);
print_element (PRINT_VERSION, name.version);
print_element (PRINT_MACHINE, name.machine);
exit (0);
}
/* If the name element set in MASK is selected for printing in `toprint',
print ELEMENT; then print a space unless it is the last element to
be printed, in which case print a newline. */
static void
print_element (mask, element)
unsigned char mask;
char *element;
{
if (toprint & mask)
{
toprint &= ~mask;
printf ("%s%c", element, toprint ? ' ' : '\n');
}
}
static void
usage ()
{
fprintf (stderr, "\
Usage: %s [-snrvma] [--sysname] [--nodename] [--release] [--version]\n\
[--machine] [--all]\n", program_name);
exit (1);
}
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