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Hi!
The standard says that say _POSIX_REALTIME_SIGNALS shall be undefined
or defined to either -1, 0 or 200112L and that sysconf (_SC_REALTIME_SIGNALS)
shall return either -1 or 200112L. For many features we return that,
but for many sysconf returns 1.
The following patch changes those which have "shall return either -1 or
200112L" wording.
I wonder if it shouldn't be
#if _POSIX_REALTIME_SIGNALS > 0
return _POSIX_REALTIME_SIGNALS;
#else
return -1;
#endif
instead for the feature macros, as e.g. sysconf (_SC_MONOTONIC_CLOCK)
will otherwise return 0 on glibc built without _NR_clock_getres defined
in asm/unistd.h.
2004-05-10 Jakub Jelinek <jakub@redhat.com>
* sysdeps/posix/sysconf.c (__sysconf) <cases _SC_REALTIME_SIGNALS,
_SC_PRIORITY_SCHEDULING, _SC_TIMERS, _SC_ASYNCHRONOUS_IO,
_SC_PRIORITIZED_IO, _SC_SYNCHRONIZED_IO, _SC_FSYNC, _SC_MAPPED_FILES,
_SC_MEMLOCK, _SC_MEMLOCK_RANGE, _SC_MEMORY_PROTECTION,
_SC_MESSAGE_PASSING, _SC_SEMAPHORES, _SC_SHARED_MEMORY_OBJECTS,
_SC_THREADS, _SC_THREAD_SAFE_FUNCTIONS, _SC_THREAD_ATTR_STACKADDR,
_SC_THREAD_ATTR_STACKSIZE, _SC_THREAD_PRIORITY_SCHEDULING,
_SC_THREAD_PRIO_INHERIT, _SC_THREAD_PRIO_PROTECT,
_SC_THREAD_PROCESS_SHARED>: Return _POSIX_* value instead of 1.
* sysdeps/unix/sysv/linux/sysconf.c (__sysconf)
<case _SC_MONOTONIC_CLOCK>: Return _POSIX_VERSION instead of 1.
nptl/
* sysdeps/unix/sysv/linux/i386/sysconf.c (__sysconf): Return
_POSIX_VERSION instead of 1.
--- libc/sysdeps/unix/sysv/linux/sysconf.c.jj 2004-04-13 10:42:55.000000000 +0200
+++ libc/sysdeps/unix/sysv/linux/sysconf.c 2004-05-10 18:47:26.977149003 +0200
@@ -44,7 +44,7 @@ __sysconf (int name)
INTERNAL_SYSCALL_DECL (err);
int r;
r = INTERNAL_SYSCALL (clock_getres, err, 2, CLOCK_MONOTONIC, &ts);
- return INTERNAL_SYSCALL_ERROR_P (r, err) ? -1 : 1;
+ return INTERNAL_SYSCALL_ERROR_P (r, err) ? -1 : _POSIX_VERSION;
}
#endif
--- libc/sysdeps/posix/sysconf.c.jj 2004-03-13 10:23:15.000000000 +0100
+++ libc/sysdeps/posix/sysconf.c 2004-05-10 17:51:16.810126812 +0200
@@ -97,98 +97,98 @@ __sysconf (name)
case _SC_REALTIME_SIGNALS:
#ifdef _POSIX_REALTIME_SIGNALS
- return 1;
+ return _POSIX_REALTIME_SIGNALS;
#else
return -1;
#endif
case _SC_PRIORITY_SCHEDULING:
#ifdef _POSIX_PRIORITY_SCHEDULING
- return 1;
+ return _POSIX_PRIORITY_SCHEDULING;
#else
return -1;
#endif
case _SC_TIMERS:
#ifdef _POSIX_TIMERS
- return 1;
+ return _POSIX_TIMERS;
#else
return -1;
#endif
case _SC_ASYNCHRONOUS_IO:
#ifdef _POSIX_ASYNCHRONOUS_IO
- return 1;
+ return _POSIX_ASYNCHRONOUS_IO;
#else
return -1;
#endif
case _SC_PRIORITIZED_IO:
#ifdef _POSIX_PRIORITIZED_IO
- return 1;
+ return _POSIX_PRIORITIZED_IO;
#else
return -1;
#endif
case _SC_SYNCHRONIZED_IO:
#ifdef _POSIX_SYNCHRONIZED_IO
- return 1;
+ return _POSIX_SYNCHRONIZED_IO;
#else
return -1;
#endif
case _SC_FSYNC:
#ifdef _POSIX_FSYNC
- return 1;
+ return _POSIX_FSYNC;
#else
return -1;
#endif
case _SC_MAPPED_FILES:
#ifdef _POSIX_MAPPED_FILES
- return 1;
+ return _POSIX_MAPPED_FILES;
#else
return -1;
#endif
case _SC_MEMLOCK:
#ifdef _POSIX_MEMLOCK
- return 1;
+ return _POSIX_MEMLOCK;
#else
return -1;
#endif
case _SC_MEMLOCK_RANGE:
#ifdef _POSIX_MEMLOCK_RANGE
- return 1;
+ return _POSIX_MEMLOCK_RANGE;
#else
return -1;
#endif
case _SC_MEMORY_PROTECTION:
#ifdef _POSIX_MEMORY_PROTECTION
- return 1;
+ return _POSIX_MEMORY_PROTECTION;
#else
return -1;
#endif
case _SC_MESSAGE_PASSING:
#ifdef _POSIX_MESSAGE_PASSING
- return 1;
+ return _POSIX_MESSAGE_PASSING;
#else
return -1;
#endif
case _SC_SEMAPHORES:
#ifdef _POSIX_SEMAPHORES
- return 1;
+ return _POSIX_SEMAPHORES;
#else
return -1;
#endif
case _SC_SHARED_MEMORY_OBJECTS:
#ifdef _POSIX_SHARED_MEMORY_OBJECTS
- return 1;
+ return _POSIX_SHARED_MEMORY_OBJECTS;
#else
return -1;
#endif
@@ -507,14 +507,14 @@ __sysconf (name)
/* POSIX 1003.1c (POSIX Threads). */
case _SC_THREADS:
#ifdef _POSIX_THREADS
- return 1;
+ return _POSIX_THREADS;
#else
return -1;
#endif
case _SC_THREAD_SAFE_FUNCTIONS:
#ifdef _POSIX_THREAD_SAFE_FUNCTIONS
- return 1;
+ return _POSIX_THREAD_SAFE_FUNCTIONS;
#else
return -1;
#endif
@@ -569,42 +569,42 @@ __sysconf (name)
case _SC_THREAD_ATTR_STACKADDR:
#ifdef _POSIX_THREAD_ATTR_STACKADDR
- return 1;
+ return _POSIX_THREAD_ATTR_STACKADDR;
#else
return -1;
#endif
case _SC_THREAD_ATTR_STACKSIZE:
#ifdef _POSIX_THREAD_ATTR_STACKSIZE
- return 1;
+ return _POSIX_THREAD_ATTR_STACKSIZE;
#else
return -1;
#endif
case _SC_THREAD_PRIORITY_SCHEDULING:
#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
- return 1;
+ return _POSIX_THREAD_PRIORITY_SCHEDULING;
#else
return -1;
#endif
case _SC_THREAD_PRIO_INHERIT:
#ifdef _POSIX_THREAD_PRIO_INHERIT
- return 1;
+ return _POSIX_THREAD_PRIO_INHERIT;
#else
return -1;
#endif
case _SC_THREAD_PRIO_PROTECT:
#ifdef _POSIX_THREAD_PRIO_PROTECT
- return 1;
+ return _POSIX_THREAD_PRIO_PROTECT;
#else
return -1;
#endif
case _SC_THREAD_PROCESS_SHARED:
#ifdef _POSIX_THREAD_PROCESS_SHARED
- return 1;
+ return _POSIX_THREAD_PROCESS_SHARED;
#else
return -1;
#endif
--- libc/nptl/sysdeps/unix/sysv/linux/i386/sysconf.c.jj 2004-05-10 10:32:50.000000000 +0200
+++ libc/nptl/sysdeps/unix/sysv/linux/i386/sysconf.c 2004-05-10 18:47:43.728147006 +0200
@@ -41,7 +41,7 @@ __sysconf (int name)
return -1;
# else
extern int __atomic_has_cmpxchg attribute_hidden;
- return __atomic_has_cmpxchg ? 1 : -1;
+ return __atomic_has_cmpxchg ? _POSIX_VERSION : -1;
# endif
}
Jakub
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