4.4BSD/usr/share/man/cat2/mprotect.0

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MPROTECT(2)                 BSD Programmer's Manual                MPROTECT(2)

NNAAMMEE
     mmpprrootteecctt - control the protection of pages

SSYYNNOOPPSSIISS
     mmpprrootteecctt(_c_a_d_d_r___t _a_d_d_r, _i_n_t _l_e_n, _i_n_t _p_r_o_t);

DDEESSCCRRIIPPTTIIOONN
     The mmpprrootteecctt() system call changes the specified pages to have protection
     _p_r_o_t. Not all implementations will guarantee protection on a page basis;
     the granularity of protection changes may be as large as an entire re-
     gion.

SSEEEE AALLSSOO
     msync(2),  munmap(2),  madvise(2),  mincore(2)

HHIISSTTOORRYY
     The mmpprrootteecctt() function first appeared in 4.4BSD.

4.4BSD                           June 9, 1993                                1