FFS(3)                    386BSD Programmer's Manual                    FFS(3)

NAME
     ffs - find first bit set in a bit string

SYNOPSIS
     #include <string.h>

     int
     ffs(int value)

DESCRIPTION
     The ffs() fucntion finds the first bit set in value and returns the index
     of that bit.  Bits are numbered starting from 1, starting at the right-
     most bit.  A return value of 0 means that the argument was zero.

SEE ALSO
     bitstring(3)

HISTORY
     The ffs() function appeared in 4.3BSD.

BSD Experimental                April 19, 1991                               1