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author | brucec <brucec@FreeBSD.org> | 2011-02-13 17:43:56 +0000 |
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committer | brucec <brucec@FreeBSD.org> | 2011-02-13 17:43:56 +0000 |
commit | 3835cbd87137939edd753a1ca3b8177354f8b61b (patch) | |
tree | 022e642f97eabdba602f5921a2fbef588951d200 | |
parent | 68423d53e04e3ed2015a2fefa355aab421b32a9f (diff) | |
download | FreeBSD-src-3835cbd87137939edd753a1ca3b8177354f8b61b.zip FreeBSD-src-3835cbd87137939edd753a1ca3b8177354f8b61b.tar.gz |
Document some more sysconf(3) variables.
MFC after: 1 month
-rw-r--r-- | lib/libc/gen/sysconf.3 | 59 |
1 files changed, 58 insertions, 1 deletions
diff --git a/lib/libc/gen/sysconf.3 b/lib/libc/gen/sysconf.3 index 05766cc..51f7eeb 100644 --- a/lib/libc/gen/sysconf.3 +++ b/lib/libc/gen/sysconf.3 @@ -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 online. 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 |