mqueues: Let the world know we support them.

There are two ways to determine whether we support the message
passing interface, as described in POSIX 1003.1B standard.

The standard way is to use sysconf(3) and the DragonFly-specific
way is to check the value of p1003_1b.message_passing sysctl.

We make sure that both return consistent results with respect to
each other.

diff --git a/lib/libc/gen/sysconf.c b/lib/libc/gen/sysconf.c
index b2313c7..fad0717 100644 (file)
--- a/lib/libc/gen/sysconf.c
+++ b/lib/libc/gen/sysconf.c
@@ -203,13 +203,7 @@ do_NAME_MAX:
        case _SC_MEMORY_PROTECTION:
                return (_POSIX_MEMORY_PROTECTION);
        case _SC_MESSAGE_PASSING:
-#if _POSIX_MESSAGE_PASSING == 0
-               mib[0] = CTL_P1003_1B;
-               mib[1] = CTL_P1003_1B_MESSAGE_PASSING;
-               goto yesno;
-#else
                return (_POSIX_MESSAGE_PASSING);
-#endif
        case _SC_PRIORITIZED_IO:
 #if _POSIX_PRIORITIZED_IO == 0
                mib[0] = CTL_P1003_1B;

diff --git a/sys/kern/kern_p1003_1b.c b/sys/kern/kern_p1003_1b.c
index 2906e1d..d8b3a86 100644 (file)
--- a/sys/kern/kern_p1003_1b.c
+++ b/sys/kern/kern_p1003_1b.c
@@ -46,6 +46,7 @@
 #include <sys/module.h>
 #include <sys/sysproto.h>
 #include <sys/sysctl.h>
+#include <sys/unistd.h>
 
 MALLOC_DEFINE(M_P31B, "p1003.1b", "Posix 1003.1B");
 
@@ -289,6 +290,7 @@ static void p31binit(void *notused)
 {
        (void) sched_attach();
        p31b_setcfg(CTL_P1003_1B_PAGESIZE, PAGE_SIZE);
+       p31b_setcfg(CTL_P1003_1B_MESSAGE_PASSING, _POSIX_MESSAGE_PASSING);
 }
 
 SYSINIT(p31b, SI_SUB_P1003_1B, SI_ORDER_FIRST, p31binit, NULL);

diff --git a/sys/sys/unistd.h b/sys/sys/unistd.h
index 3619359..a2dd688 100644 (file)
--- a/sys/sys/unistd.h
+++ b/sys/sys/unistd.h
@@ -64,7 +64,7 @@
 #define        _POSIX_MEMLOCK                  -1
 #define        _POSIX_MEMLOCK_RANGE            200112L
 #define        _POSIX_MEMORY_PROTECTION        200112L
-#define        _POSIX_MESSAGE_PASSING          -1
+#define        _POSIX_MESSAGE_PASSING          200112L
 #define        _POSIX_MONOTONIC_CLOCK          200112L
 #define        _POSIX_NO_TRUNC                 1
 #define        _POSIX_PRIORITIZED_IO           -1