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36 .Nd display information about the system
43 command writes the name of the operating system implementation to
45 When options are specified, strings representing one or more system
46 characteristics are written to standard output.
48 The options are as follows:
49 .Bl -tag -width indent
51 Behave as though the options
57 Write the kernel ident to standard output.
61 version of the kernel.
63 Write the type of the current hardware platform to standard output.
65 Write the name of the system to standard output.
67 This is a synonym for the
69 option, for compatibility with other systems.
71 Write the type of the machine processor architecture to standard output.
73 Write the current release level of the operating system
76 Write the name of the operating system implementation to standard output.
80 version of the user environment.
82 Write the version level of this release of the operating system
88 flag is specified, or multiple flags are specified, all
89 output is written on a single line, separated by spaces.
95 flags are intended to be used for fine grain differentiation of incremental
97 development and user visible changes.
99 An environment variable composed of the string
101 followed by any flag to the
105 will allow the corresponding data to be set to the contents
106 of the environment variable.
110 .Xr feature_present 3 ,
118 command is expected to conform to the
124 command appeared in PWB UNIX.
130 extension flags appeared in