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Author SHA1 Message Date
kib e6a85661ce Implement read(2)/write(2) and neccessary lseek(2) 
for posix shmfd. Add MAC framework entries for posix shm read and write.

Do not allow implicit extension of the underlying memory segment past
the limit set by ftruncate(2) by either of the syscalls.  Read and
write returns short i/o, lseek(2) fails with EINVAL when resulting
offset does not fit into the limit.

Discussed with:	alc
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
 2018-08-24 15:00:02 +02:00
Gedare Bloom 644e40dd9c rtems: add sys/mman.h 
This file was copied verbatim from FreeBSD and is in sync
	with the FreeBSD svn version used by rtems-libbsd.

Signed-off-by: Joel Sherrill <joelemail@rtems.org>
 2016-08-08 11:11:48 -05:00