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@(#)uname.3 8.1 (Berkeley) 1/4/94
.Dd June 14, 2014 .Dt UNAME 3 .Os .Sh NAME .Nm uname .Nd get system identification .Sh LIBRARY .Lb libc .Sh SYNOPSIS n sys/utsname.h .Ft int .Fn uname "struct utsname *name" .Sh DESCRIPTION The .Fn uname function stores nul-terminated strings of information identifying the current system into the structure referenced by .Fa name .
p The .Em utsname structure is defined in the n sys/utsname.h header file, and contains the following members: l -tag -width nodenameXXXX -offset indent t Va sysname Name of the operating system implementation. Equivalent to the .Xr sysctl 7 .Va kern.ostype variable. t Va nodename Network name of this machine. Equivalent to the .Xr sysctl 7 .Va kern.hostname variable. t Va release Release level of the operating system. Equivalent to the .Xr sysctl 7 .Va kern.osrelease variable. t Va version Version level of the operating system. Equivalent to the .Xr sysctl 7 .Va kern.version variable, except that very long values are truncated, and newlines are converted to spaces. t Va machine Machine hardware platform. Equivalent to the .Xr sysctl 7 .Va hw.machine variable. .El .Sh RETURN VALUES If .Nm uname is successful, 0 is returned, otherwise, -1 is returned and .Va errno is set appropriately. .Sh ERRORS The .Fn uname function may fail and set .Va errno for any of the errors specified for the library functions .Xr sysctl 3 . .Sh SEE ALSO .Xr uname 1 , .Xr sysctl 3 .Sh STANDARDS The .Fn uname function conforms to .St -p1003.1-90 . .Sh HISTORY The .Nm uname function first appeared in x 4.4 .
Indexes created Mon Sep 22 10:09:38 GMT 2025