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.TH SHM_OPEN 3 2009-02-25 "Linux" "Linux Programmer's Manual"
.SH NAME
-shm_open, shm_unlink \- Create/open or unlink POSIX shared memory objects
+shm_open, shm_unlink \- create/open or unlink POSIX shared memory objects
.SH SYNOPSIS
.B #include <sys/mman.h>
.br
will fail (unless
.B O_CREAT
was specified, in which case a new, distinct object is created).
-.SH "RETURN VALUE"
+.SH RETURN VALUE
On success,
.BR shm_open ()
returns a nonnegative file descriptor.
that does not exist.
.SH VERSIONS
These functions are provided in glibc 2.2 and later.
-.SH "CONFORMING TO"
+.SH CONFORMING TO
POSIX.1-2001.
.LP
POSIX.1-2001 says that the group ownership of a newly created shared
memory object is set to either the calling process's effective group ID
or "a system default group ID".
-.SH "NOTES"
+.SH NOTES
.LP
POSIX leaves the behavior of the combination of
.B O_RDONLY
of a dedicated file system, which is normally
mounted under
.IR /dev/shm .
-.SH "SEE ALSO"
+.SH SEE ALSO
.BR close (2),
.BR fchmod (2),
.BR fchown (2),