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GETOSRELDATE(3) FreeBSD Library Functions Manual GETOSRELDATE(3)
NAME
getosreldate - get the value of __FreeBSD_version
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int
getosreldate(void);
DESCRIPTION
The getosreldate() function returns an integer showing the version of the
currently running FreeBSD kernel. Definitions of the values can be found
in The Porter's Handbook:
https://www.FreeBSD.org/doc/en/books/porters-handbook/
RETURN VALUES
Upon successful completion, getosreldate() returns the value requested;
otherwise the value -1 is returned and the global variable errno is set
to indicate the error.
ENVIRONMENT
OSVERSION If the environment variable OSVERSION is set, it will override
the getosreldate() return value.
EXAMPLES
An example can be found in /usr/share/examples/FreeBSD_version.
ERRORS
The getosreldate() function may fail and set errno for any of the errors
specified for the library function sysctl(3).
SEE ALSO
The Porter's Handbook.
HISTORY
The getosreldate() function appeared in FreeBSD 2.0.
FreeBSD 14.0-RELEASE-p6 June 13, 2018 FreeBSD 14.0-RELEASE-p6