Man page or keyword search:   man All Sections 1 - General Commands 2 - System Calls 3 - Subroutines, Functions 4 - Special Files 5 - File Formats 6 - Games and Screensavers 7 - Macros and Conventions 8 - Maintenence Commands 9 - Kernel Interface New Commands Server 4.4BSD AIX Alpinelinux Archlinux Aros BSDOS BSDi Bifrost CentOS Cygwin Darwin Debian DigitalUNIX DragonFly ElementaryOS Fedora FreeBSD Gentoo GhostBSD HP-UX Haiku Hurd IRIX Inferno JazzOS Kali Knoppix LinuxMint MacOSX Mageia Mandriva Manjaro Minix MirBSD NeXTSTEP NetBSD OPENSTEP OSF1 OpenBSD OpenDarwin OpenIndiana OpenMandriva OpenServer OpenSuSE OpenVMS Oracle PC-BSD Peanut Pidora Plan9 QNX Raspbian RedHat Scientific Slackware SmartOS Solaris SuSE SunOS Syllable Tru64 UNIXv7 Ubuntu Ultrix UnixWare Xenix YellowDog aLinux   10987 pages apropos Keyword Search (all sections) Output format html ascii pdf view pdf save postscript

mprotect(2)							   mprotect(2)

NAME
       mprotect() - set or check protection of memory mapping

SYNOPSIS
DESCRIPTION
       The  function  changes the access protections on the mappings specified
       by the range [addr, addr+len], rounding len up to the next multiple  of
       the  page size as returned by to be that specified by prot.  Legitimate
       values for prot are the same as those permitted for and are defined in

	      Page can be read.

	      Page can be written.

	      Page can be executed.

	      Page cannot be accessed.

	      Check page effective permissions

       If flag is specified, checks the access	protections  on	 the  mappings
       specified  with	the rest of prot value to see if the requested permis‐
       sions are set.

       If the address range being modified corresponds to a mapped  file  that
       was  mapped  with  grants  write	 access	 permission  only  if the file
       descriptor used to map the file was opened for writing.	If the address
       range  corresponds  to  a  mapped  file that was mapped with the or the
       flag, grants all requested access permissions.

       When fails for reasons other than the protections on some of the	 pages
       in the range [addr, addr+len] may have been changed.

       For example, if an error occurs on some page at an addr2, then may have
       modified the protections of all whole pages in the range [addr,addr2].

RETURN VALUE
       Upon successful completion, returns Otherwise, it returns and  sets  to
       indicate the error.

ERRORS
       The function will fail if:

	      The	     prot  argument  specifies	a protection that vio‐
			     lates, or is different than (in  the  case	 where
			     flag  is  present),  the  access  permission  the
			     process has to the underlying memory object.

	      prot	     is invalid, or addr is not a multiple of the page
			     size as returned by

	      The range specified by
			     [addr,  addr+len]	(from, and including, addr to,
			     but not including, addr+len) is invalid  for  the
			     address  space  of a process, or the range speci‐
			     fies one or more unmapped pages.

	      Addresses in the range
			     [addr, addr+len]  are  invalid  for  the  address
			     space  of a process, or specify one or more pages
			     which are not mapped.

	      The	     prot argument specifies over a mapping and	 there
			     are  insufficient memory resources to reserve for
			     locking the private page.

AUTHOR
       was developed by HP, AT&T, and OSF.

SEE ALSO
       mmap(2), sysconf(2), <sys/mman.h>.

STANDARDS CONFORMANCE
								   mprotect(2)

Vote for polarhome