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authorUlrich Drepper <drepper@redhat.com>2000-06-22 19:17:44 +0000
committerUlrich Drepper <drepper@redhat.com>2000-06-22 19:17:44 +0000
commitd0db5a4454cf241095cd328cc381bdce40f414ef (patch)
treea13acdfa450940ce68dd3cc884d0b227ef0a37a0 /manual
parent33256e8a8c60eb6a5b51f7c951671aab611d1c8e (diff)
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Update.
* manual/filesys.texi: Document S_TYPEISMQ, S_TYPEISSEM, and S_TYPEISSHM.
Diffstat (limited to 'manual')
-rw-r--r--manual/filesys.texi34
1 files changed, 33 insertions, 1 deletions
diff --git a/manual/filesys.texi b/manual/filesys.texi
index 0f27cfc..3f62aa1 100644
--- a/manual/filesys.texi
+++ b/manual/filesys.texi
@@ -1811,6 +1811,38 @@ This is the file type constant of a socket.
This is the file type constant of a FIFO or pipe.
@end table
+The POSIX.1b standard introduced a few more objects which possibly can
+be implemented as object in the filesystem. These are message queues,
+semaphores, and shared memory objects. To allow differentiating these
+objects from other files the POSIX standard introduces three new test
+macros. But unlike the other macros it does not take the value of the
+@code{st_mode} field as the parameter. Instead they expect a pointer to
+the whole @code{struct stat} structure.
+
+@comment sys/stat.h
+@comment POSIX
+@deftypefn Macro int S_TYPEISMQ (struct stat @var{s})
+If the system implement POSIX message queues as distinct objects and the
+file is a message queue object, this macro returns a non-zero value.
+In all other cases the result is zero.
+@end deftypefn
+
+@comment sys/stat.h
+@comment POSIX
+@deftypefn Macro int S_TYPEISSEM (struct stat @var{s})
+If the system implement POSIX semaphores as distinct objects and the
+file is a semaphore object, this macro returns a non-zero value.
+In all other cases the result is zero.
+@end deftypefn
+
+@comment sys/stat.h
+@comment POSIX
+@deftypefn Macro int S_TYPEISSHM (struct stat @var{s})
+If the system implement POSIX shared memory objects as distinct objects
+and the file is an shared memory object, this macro returns a non-zero
+value. In all other cases the result is zero.
+@end deftypefn
+
@node File Owner
@subsection File Owner
@cindex file owner
@@ -2558,7 +2590,7 @@ The operation was interrupted by a signal.
@deftypefun int truncate64 (const char *@var{name}, off64_t @var{length})
This function is similar to the @code{truncate} function. The
difference is that the @var{length} argument is 64 bits wide even on 32
-bits machines, which allows the handling of files with sizes up to
+bits machines, which allows the handling of files with sizes up to
@math{2^63} bytes.
When the source file is compiled with @code{_FILE_OFFSET_BITS == 64} on a