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OpenDarwin 7.2.1 - man page for mprotect (opendarwin section 2)

MPROTECT(2)				       BSD System Calls Manual					  MPROTECT(2)

NAME
mprotect -- control the protection of pages
SYNOPSIS
#include <sys/types.h> #include <sys/mman.h> int mprotect(caddr_t addr, size_t len, int prot);
DESCRIPTION
The mprotect() system call changes the specified pages to have protection prot. Not all implementations will guarantee protection on a page basis; the granularity of protection changes may be as large as an entire region.
RETURN VALUES
Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error.
SEE ALSO
madvise(2), mincore(2), msync(2), munmap(2)
HISTORY
The mprotect() function first appeared in 4.4BSD.
BSD
June 9, 1993 BSD


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