freebsd man page for getbootfile

GETBOOTFILE(3)						   BSD Library Functions Manual 					    GETBOOTFILE(3)

NAME
     getbootfile -- get kernel boot file name

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <paths.h>

     const char *
     getbootfile(void);

DESCRIPTION
     The getbootfile() function retrieves the full pathname of the file from which the current kernel was loaded, and returns a static pointer to
     the name.	A read/write interface to this information is available via the sysctl(3) MIB variable ``kern.bootfile''.

RETURN VALUES
     If the call succeeds a string giving the pathname is returned.  If it fails, a null pointer is returned and an error code is placed in the
     global location errno.

SEE ALSO
     sysctl(3)

HISTORY
     The getbootfile() function appeared in FreeBSD 2.0.

BUGS
     If the boot blocks have not been modified to pass this information into the kernel at boot time, the static string ``/boot/kernel/kernel'' is
     returned instead of the real boot file.

BSD
								September 23, 1994							       BSD