Fawkes API  Fawkes Development Version
hostinfo.cpp
1 
2 /***************************************************************************
3  * hostinfo.h - hostname utilities
4  *
5  * Created: Fri Jan 12 16:12:09 2007
6  * Copyright 2007 Tim Niemueller [www.niemueller.de]
7  *
8  ****************************************************************************/
9 
10 /* This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version. A runtime exception applies to
14  * this software (see LICENSE.GPL_WRE file mentioned below for details).
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19  * GNU Library General Public License for more details.
20  *
21  * Read the full text in the LICENSE.GPL_WRE file in the doc directory.
22  */
23 
24 #include <core/exceptions/software.h>
25 #include <sys/utsname.h>
26 #include <utils/system/hostinfo.h>
27 
28 #include <cstdlib>
29 #include <cstring>
30 
31 namespace fawkes {
32 
33 /** @class HostInfo utils/system/hostinfo.h
34  * Host information.
35  * This class provides access to basic system information like hostname,
36  * domain name, architecture and system information. It's basically a
37  * C++ wrapper to the uname system call.
38  * @author Tim Niemueller
39  */
40 
41 /** Constructor. */
43 {
44  utsname = (struct ::utsname *)malloc(sizeof(struct ::utsname));
45 
46  if (uname(utsname) != 0) {
47  ::free(utsname);
48  utsname = NULL;
49  throw NullPointerException("Could not call uname");
50  }
51 
52  shortname_ = NULL;
53  domain_name = NULL;
54 
55  update();
56 }
57 
58 /** Destructor. */
60 {
61  free(utsname);
62  free(shortname_);
63  free(domain_name);
64 }
65 
66 /** Update information.
67  * Gathers the information again.
68  */
69 void
71 {
72  if (shortname_ != NULL) {
73  free(shortname_);
74  }
75  if (domain_name != NULL) {
76  free(domain_name);
77  }
78 
79  char *dot;
80  if ((dot = strchr(utsname->nodename, '.')) == NULL) {
81  shortname_ = strdup(utsname->nodename);
82  domain_name = strdup("");
83  } else {
84  int short_length = dot - utsname->nodename + 1;
85  int domain_length = strlen(utsname->nodename) - short_length + 1;
86  shortname_ = (char *)malloc(short_length);
87  shortname_[short_length - 1] = 0;
88  strncpy(shortname_, utsname->nodename, short_length - 1);
89 
90  domain_name = (char *)malloc(domain_length);
91  domain_name[domain_length - 1] = 0;
92  strncpy(domain_name, dot + 1, domain_length - 1);
93  }
94 }
95 
96 /** Get full hostname.
97  * @return hostname
98  */
99 const char *
101 {
102  return utsname->nodename;
103 }
104 
105 /** Get short hostname (up to first dot).
106  * @return short hostname
107  */
108 const char *
110 {
111  return shortname_;
112 }
113 
114 /** Get domain name (after first dot or none if no dot in name).
115  * @return domain name
116  */
117 const char *
119 {
120  return domain_name;
121 }
122 
123 /** Get architecture (like i686 or x86_64).
124  * @return architecture
125  */
126 const char *
128 {
129  return utsname->machine;
130 }
131 
132 /** Get system name (like Linux).
133  * @return system name
134  */
135 const char *
137 {
138  return utsname->sysname;
139 }
140 
141 /** Get system release (kernel version on Linux).
142  * @return system release
143  */
144 const char *
146 {
147  return utsname->release;
148 }
149 
150 /** Get system version (build date on Linux).
151  * @return system version
152  */
153 const char *
155 {
156  return utsname->version;
157 }
158 
159 } // end namespace fawkes
fawkes::HostInfo::sys_version
const char * sys_version()
Get system version (build date on Linux).
Definition: hostinfo.cpp:158
fawkes::HostInfo::HostInfo
HostInfo()
Constructor.
Definition: hostinfo.cpp:46
fawkes::HostInfo::name
const char * name()
Get full hostname.
Definition: hostinfo.cpp:104
fawkes::HostInfo::sys_release
const char * sys_release()
Get system release (kernel version on Linux).
Definition: hostinfo.cpp:149
fawkes::HostInfo::short_name
const char * short_name()
Get short hostname (up to first dot).
Definition: hostinfo.cpp:113
fawkes::HostInfo::~HostInfo
~HostInfo()
Destructor.
Definition: hostinfo.cpp:63
fawkes
fawkes::HostInfo::sys_name
const char * sys_name()
Get system name (like Linux).
Definition: hostinfo.cpp:140
fawkes::HostInfo::update
void update()
Update information.
Definition: hostinfo.cpp:74
fawkes::HostInfo::domain
const char * domain()
Get domain name (after first dot or none if no dot in name).
Definition: hostinfo.cpp:122
fawkes::NullPointerException
Definition: software.h:35
fawkes::HostInfo::arch
const char * arch()
Get architecture (like i686 or x86_64).
Definition: hostinfo.cpp:131