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UNAME(3) Library Functions Manual UNAME(3)

unameget system identification

library “libc”

#include <sys/utsname.h>

int
uname(struct utsname *name);

The () function stores nul-terminated strings of information identifying the current system into the structure referenced by name.

The structure is defined in the <sys/utsname.h> header file, and contains the following members:

sysname
Name of the operating system implementation. Equivalent to the sysctl(7) kern.ostype variable.
nodename
Network name of this machine. Equivalent to the sysctl(7) kern.hostname variable.
release
Release level of the operating system. Equivalent to the sysctl(7) kern.osrelease variable.
version
Version level of the operating system. Equivalent to the sysctl(7) kern.version variable, except that very long values are truncated, and newlines are converted to spaces.
machine
Machine hardware platform. Equivalent to the sysctl(7) hw.machine variable.

If uname is successful, 0 is returned, otherwise, -1 is returned and errno is set appropriately.

The uname() function may fail and set errno for any of the errors specified for the library functions sysctl(3).

uname(1), sysctl(3)

The uname() function conforms to IEEE Std 1003.1-1990 (“POSIX.1”).

The uname function first appeared in 4.4BSD.

June 14, 2014 NetBSD-9.2