1 SYSINFO(2) System Calls SYSINFO(2)
2
3
4
5 NAME
6 sysinfo - get and set system information strings
7
8 SYNOPSIS
9 #include <sys/systeminfo.h>
10
11 int sysinfo(int command, char *buf, long count);
12
13
14 DESCRIPTION
15 The sysinfo() function copies information relating to the operating
16 system on which the process is executing into the buffer pointed to by
17 buf. It can also set certain information where appropriate commands are
18 available. The count parameter indicates the size of the buffer.
19
20
21 The POSIX P1003.1 interface (see standards(5)) sysconf(3C) provides a
22 similar class of configuration information, but returns an integer
23 rather than a string.
24
25
26 The values for command are as follows:
27
28 SI_SYSNAME
29
30 Copy into the array pointed to by buf the string that would be
31 returned by uname(2) in the sysname field. This is the name of the
32 implementation of the operating system, for example, SunOS or UTS.
33
34
35 SI_HOSTNAME
36
37 Copy into the array pointed to by buf a string that names the
38 present host machine. This is the string that would be returned by
39 uname() in the nodename field. This hostname or nodename is often
40 the name the machine is known by locally. The hostname is the name
41 of this machine as a node in some network. Different networks might
42 have different names for the node, but presenting the nodename to
43 the appropriate network directory or name-to-address mapping
44 service should produce a transport end point address. The name
45 might not be fully qualified. Internet host names can be up to 256
46 bytes in length (plus the terminating null).
47
48
49 SI_SET_HOSTNAME
50
51 Copy the null-terminated contents of the array pointed to by buf
52 into the string maintained by the kernel whose value will be
53 returned by succeeding calls to sysinfo() with the command
54 SI_HOSTNAME. This command requires that {PRIV_SYS_ADMIN} is
55 asserted in the effective set of the calling process.
56
57
58 SI_RELEASE
59
60 Copy into the array pointed to by buf the string that would be
61 returned by uname(2) in the release field. Typical values might be
62 5.2 or 4.1.
63
64
65 SI_VERSION
66
67 Copy into the array pointed to by buf the string that would be
68 returned by uname(2) in the version field. The syntax and semantics
69 of this string are defined by the system provider.
70
71
72 SI_MACHINE
73
74 Copy into the array pointed to by buf the string that would be
75 returned by uname(2) in the machine field, for example, sun4u.
76
77
78 SI_ARCHITECTURE
79
80 Copy into the array pointed to by buf a string describing the basic
81 instruction set architecture of the current system, for example,
82 sparc, mc68030, m32100, or i386. These names might not match
83 predefined names in the C language compilation system.
84
85
86 SI_ARCHITECTURE_64
87
88 Copy into the array pointed to by buf a string describing the
89 64-bit instruction set architecture of the current system, for
90 example, sparcv9 or amd64. These names might not match predefined
91 names in the C language compilation system. This subcode is not
92 recognized on systems that do not allow a 64-bit application to
93 run.
94
95
96 SI_ARCHITECTURE_32
97
98 Copy into the array pointed to by buf a string describing the
99 32-bit instruction set architecture of the current system, for
100 example, sparc or i386. These names might not match predefined
101 names in the C language compilation system.
102
103
104 SI_ARCHITECTURE_K
105
106 Copy into the array pointed to by buf a string describing the
107 kernel instruction set architecture of the current system for
108 example sparcv9 or i386. These names might not match predefined
109 names in the C language compilation system.
110
111
112 SI_ARCHITECTURE_NATIVE
113
114 Copy into the array pointed to by buf a string describing the
115 native instruction set architecture of the current system, for
116 example sparcv9 or i386. These names might not match predefined
117 names in the C language compilation system.
118
119
120 SI_ISALIST
121
122 Copy into the array pointed to by buf the names of the variant
123 instruction set architectures executable on the current system.
124
125 The names are space-separated and are ordered in the sense of best
126 performance. That is, earlier-named instruction sets might contain
127 more instructions than later-named instruction sets; a program that
128 is compiled for an earlier-named instruction set will most likely
129 run faster on this machine than the same program compiled for a
130 later-named instruction set.
131
132 Programs compiled for an instruction set that does not appear in
133 the list will most likely experience performance degradation or not
134 run at all on this machine.
135
136 The instruction set names known to the system are listed in
137 isalist(5); these names might not match predefined names or
138 compiler options in the C language compilation system.
139
140 This command is obsolete and might be removed in a future release.
141 See getisax(2) and the Linker and Libraries Guide for a better way
142 to handle instruction set extensions.
143
144
145 SI_PLATFORM
146
147 Copy into the array pointed to by buf a string describing the
148 specific model of the hardware platform, for example, SUNW,Sun-
149 Blade-1500, SUNW,Sun-Fire-T200, or i86pc.
150
151
152 SI_HW_PROVIDER
153
154 Copies the name of the hardware manufacturer into the array pointed
155 to by buf.
156
157
158 SI_HW_SERIAL
159
160 Copy into the array pointed to by buf a string which is the ASCII
161 representation of the hardware-specific serial number of the
162 physical machine on which the function is executed. This might be
163 implemented in Read-Only Memory, using software constants set when
164 building the operating system, or by other means, and might contain
165 non-numeric characters. If the function is executed within a non-
166 global zone that emulates a host identifier, then the ASCII
167 representation of the zone's host identifier is copied into the
168 array pointed to by buf. It is anticipated that manufacturers will
169 not issue the same "serial number" to more than one physical
170 machine. The pair of strings returned by SI_HW_PROVIDER and
171 SI_HW_SERIAL is not guaranteed to be unique across all vendor's
172 SVR4 implementations and could change over the lifetime of a given
173 system.
174
175
176 SI_SRPC_DOMAIN
177
178 Copies the Secure Remote Procedure Call domain name into the array
179 pointed to by buf.
180
181
182 SI_SET_SRPC_DOMAIN
183
184 Set the string to be returned by sysinfo() with the SI_SRPC_DOMAIN
185 command to the value contained in the array pointed to by buf. This
186 command requires that {PRIV_SYS_ADMIN} is asserted in the effective
187 set of the calling process.
188
189
190 SI_DHCP_CACHE
191
192 Copy into the array pointed to by buf an ASCII string consisting of
193 the ASCII hexadecimal encoding of the name of the interface
194 configured by boot(1M) followed by the DHCPACK reply from the
195 server. This command is intended for use only by the dhcpagent(1M)
196 DHCP client daemon for the purpose of adopting the DHCP maintenance
197 of the interface configured by boot.
198
199
200 RETURN VALUES
201 Upon successful completion, the value returned indicates the buffer
202 size in bytes required to hold the complete value and the terminating
203 null character. If this value is no greater than the value passed in
204 count, the entire string was copied. If this value is greater than
205 count, the string copied into buf has been truncated to count-1 bytes
206 plus a terminating null character.
207
208
209 Otherwise, -1 is returned and errno is set to indicate the error.
210
211 ERRORS
212 The sysinfo() function will fail if:
213
214 EFAULT
215 The buf argument does not point to a valid address.
216
217
218 EINVAL
219 The count argument for a non-SET command is less than 0 or
220 the data for a SET command exceeds the limits established by
221 the implementation.
222
223
224 EPERM
225 The {PRIV_SYS_ADMIN} was not asserted in the effective set of
226 the calling process.
227
228
229 USAGE
230 In many cases there is no corresponding programming interface to set
231 these values; such strings are typically settable only by the system
232 administrator modifying entries in the /etc/system directory or the
233 code provided by the particular OEM reading a serial number or code out
234 of read-only memory, or hard-coded in the version of the operating
235 system.
236
237
238 A good estimation for count is 257, which is likely to cover all
239 strings returned by this interface in typical installations.
240
241 SEE ALSO
242 boot(1M), dhcpagent(1M), getisax(2), uname(2), gethostid(3C),
243 gethostname(3C), sysconf(3C), isalist(5), privileges(5), standards(5),
244 zones(5)
245
246
247 Linker and Libraries Guide
248
249
250
251 September 7, 2015 SYSINFO(2)