svn commit: r218645 - head/lib/libc/gen
Bruce Cran
brucec at FreeBSD.org
Sun Feb 13 17:43:56 UTC 2011
Author: brucec
Date: Sun Feb 13 17:43:56 2011
New Revision: 218645
URL: http://svn.freebsd.org/changeset/base/218645
Log:
Document some more sysconf(3) variables.
MFC after: 1 month
Modified:
head/lib/libc/gen/sysconf.3
Modified: head/lib/libc/gen/sysconf.3
==============================================================================
--- head/lib/libc/gen/sysconf.3 Sun Feb 13 16:18:22 2011 (r218644)
+++ head/lib/libc/gen/sysconf.3 Sun Feb 13 17:43:56 2011 (r218645)
@@ -28,7 +28,7 @@
.\" @(#)sysconf.3 8.3 (Berkeley) 4/19/94
.\" $FreeBSD$
.\"
-.Dd December 14, 2006
+.Dd February 13, 2011
.Dt SYSCONF 3
.Os
.Sh NAME
@@ -85,6 +85,9 @@ The number of processors currently onlin
The maximum number of open files per user id.
.It Li _SC_PAGESIZE
The size of a system page in bytes.
+.It Li _SC_PAGE_SIZE
+Equivalent to
+.Li _SC_PAGESIZE .
.It Li _SC_STREAM_MAX
The minimum maximum number of streams that a process may have open
at any one time.
@@ -160,10 +163,64 @@ otherwise \-1.
.It Li _SC_2_UPE
Return 1 if the system supports the User Portability Utilities Option,
otherwise \-1.
+.It Li _SC_AIO_LISTIO_MAX
+Maximum number of I/O operations in a single list I/O call supported.
+.It Li _SC_AIO_MAX
+Maximum number of outstanding asynchronous I/O operations supported.
+.It Li _SC_AIO_PRIO_DELTA_MAX
+The maximum amount by which a process can decrease its asynchronous I/O
+priority level from its own scheduling priority.
+.It Li _SC_DELAYTIMER_MAX
+Maximum number of timer expiration overruns.
+.It Li _SC_MQ_OPEN_MAX
+The maximum number of open message queue descriptors a process may hold.
+.It Li _SC_RTSIG_MAX
+Maximum number of realtime signals reserved for application use.
+.It Li _SC_SEM_NSEMS_MAX
+Maximum number of semaphores that a process may have.
+.It Li _SC_SEM_VALUE_MAX
+The maximum value a semaphore may have.
+.It Li _SC_SIGQUEUE_MAX
+Maximum number of queued signals that a process may send and have pending at
+the receiver(s) at any time.
+.It Li _SC_TIMER_MAX
+Maximum number of timers per process supported.
+.It Li _SC_GETGR_R_SIZE_MAX
+Suggested initial value for the size of the group entry buffer.
+.It Li _SC_GETPW_R_SIZE_MAX
+Suggested initial value for the size of the password entry buffer.
+.It Li _SC_HOST_NAME_MAX
+Maximum length of a host name (not including the terminating null) as
+returned from the
+.Fn gethostname
+function.
+.It Li _SC_LOGIN_NAME_MAX
+Maximum length of a login name.
+.It Li _SC_THREAD_STACK_MIN
+Minimum size in bytes of thread stack storage.
+.It Li _SC_THREAD_THREADS_MAX
+Maximum number of threads that can be created per process.
+.It Li _SC_TTY_NAME_MAX
+Maximum length of terminal device name.
+.It Li _SC_SYMLOOP_MAX
+Maximum number of symbolic links that can be reliably traversed in the
+resolution of a pathname in the absence of a loop.
+.It Li _SC_ATEXIT_MAX
+Maximum number of functions that may be registered with
+.Fn atexit .
+.It Li _SC_XOPEN_VERSION
+An integer value greater than or equal to 4,
+indicating the version of the X/Open Portability Guide to which this
+system conforms.
+.It Li _SC_XOPEN_XCU_VERSION
+An integer value indicating the version of the XCU Specification to which
+this system conforms.
.El
.Pp
These values also exist, but may not be standard:
.Bl -tag -width 6n
+.It Li _SC_CPUSET_SIZE
+Size of the kernel cpuset.
.It Li _SC_PHYS_PAGES
The number of pages of physical memory.
Note that it is possible that the product of this value and the value of
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