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6 .TH SMBIOS 1M "Aug 31, 2005"
8 smbios \- display the contents of a System Management BIOS image
12 \fBsmbios\fR [\fB-BeOsx\fR] [\fB-i\fR \fIid\fR] [\fB-t\fR \fItype\fR] [\fB-w\fR \fIfile\fR] [\fIfile\fR]
18 The \fBsmbios\fR utility displays the contents of the System Management BIOS
19 (SMBIOS) image exported by the current system or stored in a file. SMBIOS is an
20 industry-standard mechanism for low-level system software to export hardware
21 configuration information to higher-level system management software. The
22 SMBIOS data format itself is defined by the Distributed Management Task Force
23 (DMTF). Refer to http://www.dmtf.org for more information about SMBIOS and to
24 obtain a copy of the SMBIOS specification and implementation guidelines.
27 The SMBIOS image consists of a table of structures, each describing some aspect
28 of the system software or hardware configuration. By default, \fBsmbios\fR
29 displays the entire contents of the current SMBIOS image. If the \fB-s\fR
30 option is specified, \fBsmbios\fR displays a summary of the structures that are
31 present in the image. If the \fB-w\fR option is specified, \fBsmbios\fR writes
32 a copy of the SMBIOS image to the specified file. \fBsmbios\fR can then be
33 applied to the resulting file to display its content.
36 \fBsmbios\fR attempts to display each structure and its content in a human-
37 readable fashion. If \fBsmbios\fR does not recognize a structure's type or
38 content, the raw hexadecimal data for the structure is displayed.
42 The following options are supported:
49 Disable header validation for broken BIOSes.
51 By default, \fBsmbios\fR attempts to validate the SMBIOS header by verifying
52 the anchor strings, header checksums, and version number. This option might be
53 necessary when a BIOS has a non-compliant header.
62 Display the contents of the SMBIOS entry point rather than the contents of the
63 SMBIOS structure table.
69 \fB\fB-i\fR \fIid\fR\fR
72 Display only the specified structure, named by its integer id.
81 Display obsolete structure types.
83 By default, \fBsmbios\fR elides output for structures whose type is marked as
84 obsolete in the DMTF SMBIOS specification.
93 Display only a summary listing of the structure identifiers and types, instead
94 of the content of each selected structure.
100 \fB\fB-t\fR \fItype\fR\fR
103 Display only those structures whose type matches the specified integer type, as
104 defined the DMTF SMBIOS specification.
110 \fB\fB-w\fR \fIfile\fR\fR
113 Write a copy of the SMBIOS image to the specified file and exit.
115 The SMBIOS entry point is written to the start of the file with its structure
116 table address set to the file offset of the structure table, and a new entry
117 point checksum is computed.
126 Display raw hexadecimal data for the selected structures in addition to
127 human-readable output.
129 By default, hexadecimal data is only displayed if \fBsmbios\fR cannot display
130 human-readable output for the selected structures.
136 The following operands are supported:
143 Specifies an alternate SMBIOS image to display instead of the current system's
150 The following exit values are returned:
157 Successful completion. All structures in the SMBIOS image were examined
167 A fatal error occurred, such as failure to open the specified file or device,
168 or corruption in the image.
177 Invalid command-line options were specified.
184 \fB\fB/dev/smbios\fR \fR
187 Kernel SMBIOS image device. This device special file is used to export a
188 snapshot of the current system SMBIOS image.
194 See \fBattributes\fR(5) for descriptions of the following attributes:
202 ATTRIBUTE TYPE ATTRIBUTE VALUE
204 Interface Stability See below.
209 The command-line options are Evolving. The human-readable output is Unstable.
213 \fBprtdiag\fR(1M), \fBattributes\fR(5), \fBsmbios\fR(7D)
216 \fISystem Management BIOS Reference Specification\fR (see http://www.dmtf.org)
220 The implementation of a System Management BIOS image is entirely at the
221 discretion of the system and BIOS vendors. Not all systems export an SMBIOS.
222 The SMBIOS structure content varies widely between systems and BIOS vendors and
223 frequently does not comply with the guidelines included in the specification.
224 Some structure fields might not be filled in by the BIOS at all, and others
225 might be filled inwith non-conforming values.