4.4BSD/usr/share/man/cat3/bcopy.0

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BCOPY(3)                    BSD Programmer's Manual                   BCOPY(3)

NNAAMMEE
     bbccooppyy - copy byte string

SSYYNNOOPPSSIISS
     ##iinncclluuddee <<ssttrriinngg..hh>>

     _v_o_i_d
     bbccooppyy(_c_o_n_s_t _v_o_i_d _*_s_r_c, _v_o_i_d _*_d_s_t, _s_i_z_e___t _l_e_n);

DDEESSCCRRIIPPTTIIOONN
     The bbccooppyy() function copies _l_e_n bytes from string _s_r_c to string _d_s_t. The
     two strings may overlap.  If _l_e_n is zero, no bytes are copied.

SSEEEE AALLSSOO
     memccpy(3),  memcpy(3),  memmove(3),  strcpy(3),  strncpy(3)

HHIISSTTOORRYY
     A bbccooppyy() function appeared in 4.2BSD.

4.2 Berkeley Distribution        June 4, 1993                                1