ADC Home > Reference Library > Reference > Mac OS X > Mac OS X Man Pages
|
This document is a Mac OS X manual page. Manual pages are a command-line technology for providing documentation. You can view these manual pages locally using the man(1) command. These manual pages come from many different sources, and thus, have a variety of writing styles. For more information about the manual page format, see the manual page for manpages(5). |
MPROTECT(2) BSD System Calls Manual MPROTECT(2) NAME mprotect -- control the protection of pages SYNOPSIS #include <sys/mman.h> int mprotect(void *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. ERRORS mprotect() will fail if: [EACCES] The requested protection conflicts with the access permissions of the process on the specified address range. [EINVAL] addr is not a multiple of the page size. [ENOTSUP] The combination of accesses requested in prot is not supported. LEGACY SYNOPSIS #include <sys/types.h> #include <sys/mman.h> The include file <sys/types.h> is necessary. int mprotect(caddr_t addr, size_t len, int prot); The type of addr has changed. SEE ALSO madvise(2), mincore(2), msync(2), munmap(2), compat(5) HISTORY The mprotect() function first appeared in 4.4BSD. BSD June 9, 1993 BSD |