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 15.1-STABLE-HBSD         June 13, 2018                 GETOSRELDATE(3)