OSVERSION
If the environment variable OSVERSION is set, it will override the getosreldate() return value.
getosreldate3
Get the value of __freebsd_version
Usage
#include <unistd.h>
int
getosreldate(void);
Library
Standard C Library (libc, -lc)
Overview
The getosreldate() function returns an integer showing the version of the currently running FreeBSD kernel. Definitions of the values can be found in
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
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).
Releases
59 releases since FreeBSD 4.8-RELEASE; the text changed 34 times.