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
|
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <string.h>
#include <sys/utsname.h>
const char *
get_operating_system()
{
#ifdef __gnu_linux__
return "GNU/Linux";
#endif
#ifdef __FreeBSD__
return "FreeBSD";
#endif
#ifdef __OpenBSD__
return "OpenBSD";
#endif
#ifdef _WIN32
return "Here's a USB stick kid, get a real operating system";
#endif
return "Unknown operating system";
}
int
main(int argc, char *argv[])
{
int c;
int all = 0;
int machine = 0;
int node_name = 0;
int kernel_release = 0;
int kernel_name = 0;
int operating_system = 0;
int nothing = 0;
struct utsname kernel_info;
if(argc == 1)
nothing = 1;
while((c = getopt(argc, argv, "amnrsv")) != -1) {
switch(c) {
case 'a':
all = 1;
break;
case 'm':
machine = 1;
break;
case 'n':
node_name = 1;
break;
case 'r':
kernel_release = 1;
break;
case 's':
kernel_name = 1;
break;
case 'v':
operating_system = 1;
break;
}
}
if(uname(&kernel_info) == -1) {
fprintf(stderr, "uname: %s\n", strerror(errno));
return 1;
}
if(all) {
printf("%s %s %s %s %s %s\n",
kernel_info.sysname,
kernel_info.nodename,
kernel_info.release,
kernel_info.version,
kernel_info.machine,
get_operating_system());
} else {
if(machine)
printf("%s ", kernel_info.machine);
if(node_name)
printf("%s ", kernel_info.nodename);
if(kernel_release)
printf("%s ", kernel_info.release);
if(kernel_name || nothing)
printf("%s ", kernel_info.sysname);
if(operating_system)
printf("%s", get_operating_system());
printf("\n");
}
return 0;
}
|
