summaryrefslogtreecommitdiff
path: root/src/uname.c
blob: 366e1e34aae739c0b3e5eb4b440a75277863769f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
/* 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);
}