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.