src/share/man/man7/sysctl.7 - diff

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Diff for /src/share/man/man7/sysctl.7 between version 1.62 and 1.71

version 1.62, 2011/03/18 16:20:12

version 1.71, 2012/06/09 08:22:14

Line 29

.\"

.\" @(#)sysctl.3 8.4 (Berkeley) 5/9/95

.\"

.Dd March 18, 2011

.Dd June 8, 2012

.Dt SYSCTL 7

.Os

.Sh NAME

Line 142 The highest valid file system type numbe

Returns configuration information about the file system type given as a fourth

level identifier.

.It Li vfs.generic.usermount ( VFS_USERMOUNT )

Determines if non superuser mounts are allowed, default to no

Determines if non superuser mounts are allowed, defaults to

.Dv 0 .

.It Li vfs.generic.magiclinks ( VFS_MAGICLINKS )

Controls if expansion of variables is going to be performed on pathnames

Line 306 privilege may change the value.

.It kern.logsigexit integer yes

.It kern.mapped_files integer no

.It kern.maxfiles integer yes

.It kern.maxlwp integer yes

.It kern.maxpartitions integer no

.It kern.maxphys integer no

.It kern.maxproc integer yes

Line 356 privilege may change the value.

Line 357 privilege may change the value.

.It kern.timecounter node not applicable

.It kern.timex struct no

.It kern.tkstat node not applicable

.It kern.tty node not applicable

.It kern.urandom integer no

.It kern.usercrypto integer yes

.It kern.userasymcrypto integer yes

Line 667 otherwise\ 0.

Line 669 otherwise\ 0.

The maximum number of open files that may be open in the system.

.It Li kern.maxpartitions ( KERN_MAXPARTITIONS )

The maximum number of partitions allowed per disk.

.It Li kern.maxlwp

The maximum number of Lightweight Processes (threads) the system allows

per uid.

.It Li kern.maxphys ( KERN_MAXPHYS )

Maximum raw I/O transfer size.

.It Li kern.maxproc ( KERN_MAXPROC )

Line 1048 The total number of output characters.

Line 1053 The total number of output characters.

.It Li kern.tkstat.rawcc ( KERN_TKSTAT_RAWCC )

The number of raw input characters.

.El

.It Li kern.tty

The third level names for the tty setup variables are detailed below.

The changeable column shows whether a process

with appropriate privilege may change the value.

.Bl -column "kern.tty.qsize" "int" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It kern.tty.qsize int yes

.El

.Pp

The variables are as follows:

.Bl -tag -width "123456"

.It Li kern.tty.qsize

Control/display the size of the default input and output queues selected

during tty creation.

Is converted to a power of two and its range is between

.Dv 1024

and

.Dv 65536 .

.El

.It Li kern.uidinfo

Resource usage for the current user.

.Bl -column "kern.uidinfo.proccnt" "integer" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It kern.uidinfo.proccnt integer no

.It kern.uidinfo.lwpcnt integer no

.It kern.uidinfo.lockcnt integer no

.It kern.uidinfo.sbsize integer no

.El

.Bl -tag -width "123456"

.It Li kern.uidinfo.proccnt

Returns the number of active processes for the current user.

.It Li kern.uidinfo.lwpcnt

Returns the number of active threads for the current user; the first thread

of each process is not counted.

.It Li kern.uidinfo.lockcnt

Number of locks held by the current user.

.It Li kern.uidinfo.sbsize

Number of bytes in socket buffers allocated to the current user.

.El

.It Li kern.urandom ( KERN_URND )

Random integer value.

.It Li kern.usercrypto

Line 1164 The currently defined protocols and name

Line 1208 The currently defined protocols and name

.It Sy Protocol name Variable name Type Changeable

.It arp down integer yes

.It arp keep integer yes

.It arp log_movements integer yes

.It arp log_permanent_modify integer yes

.It arp log_wrong_iface integer yes

.It arp prune integer yes

.It arp refresh integer yes

.It carp allow integer yes

Line 1235 The currently defined protocols and name

Line 1282 The currently defined protocols and name

.It udp checksum integer yes

.It udp do_loopback_cksum integer yes

.It udp recvspace integer yes

.It udp rfc6056.selected string yes

.It udp rfc6056.available string yes

.It udp sendspace integer yes

.El

.Pp

Line 1514 It has no effect unless tcp.abc.enable i

Line 1563 It has no effect unless tcp.abc.enable i

If set to 1, UDP checksums are being computed.

Received non-zero UDP checksums are always checked.

Disabling UDP checksums is strongly discouraged.

.It Li udp.sendspace

The default UDP send buffer size.

.It Li udp.recvspace

The default UDP receive buffer size.

.It Li udp.rfc6056.available

The available RFC 6056 port randomization algorithms.

.It Li udp.rfc6056.selected

The currently selected RFC 6056 port randomization algorithm.

.It Li udp.sendspace

The default UDP send buffer size.

.El

.Pp

For variables net.*.ipsec, please refer to

Line 1568 The currently defined protocols and name

Line 1621 The currently defined protocols and name

.It ip6 v6only integer yes

.It udp6 do_loopback_cksum integer yes

.It udp6 recvspace integer yes

.It udp6 rfc6056.selected string yes

.It udp6 rfc6056.available string yes

.It udp6 sendspace integer yes

.El

.Pp

Line 1775 ICMPv6 redirect.

Line 1830 ICMPv6 redirect.

Perform UDP checksum on loopback.

.It Li udp6.recvspace

Default UDP receive buffer size.

.It Li udp6.rfc6056.available

The available RFC 6056 port randomization algorithms for IPv6.

.It Li udp6.rfc6056.selected

The currently selected RFC 6056 port randomization algorithm for IPv6.

.It Li udp6.sendspace

Default UDP send buffer size.

.El

Line 2198 Number of display lines.

Line 2257 Number of display lines.

.It Li ddb.tabstops ( DDBCTL_TABSTOPS )

Tab width.

.It Li ddb.onpanic ( DDBCTL_ONPANIC )

If non-zero, DDB will be entered if the kernel panics.

If greater than zero, DDB will be entered if the kernel panics.

A value of 1 causes the system to enter DDB on panic, while a value of 2

causes the kernel to attempt to print out a stack trace before entering DDB.

A value of 0 causes the kernel to attempt to print a stack trace, then

reboot, while a value of \-1 means neither a stack trace will be printed

nor DDB entered.

.It Li ddb.fromconsole ( DDBCTL_FROMCONSOLE )

If not zero, DDB may be entered by sending a break on a serial

console or by a special key sequence on a graphics console.

Line 2301 Specifies the default global policy for

Line 2365 Specifies the default global policy for

explicit enable/disable flag.

.Pp

When non-zero, all programs will get PaX ASLR, except those exempted with

.Xr paxctl 8 .

Otherwise, all programs will not get PaX ASLR, except those specifically

marked as such with

.Xr paxctl 8 .

Line 2324 explicit enable/disable flag.

Line 2388 explicit enable/disable flag.

.Pp

When non-zero, all programs will get the PaX MPROTECT restrictions,

except those exempted with

.Xr paxctl 8 .

Otherwise, all programs will not get the PaX MPROTECT restrictions,

except those specifically marked as such with

.Xr paxctl 8 .

Line 2349 explicit enable/disable flag.

Line 2413 explicit enable/disable flag.

.Pp

When non-zero, all programs will get the PaX Segvguard,

except those exempted with

.Xr paxctl 8 .

Otherwise, no program will get the PaX Segvguard restrictions,

except those specifically marked as such with

.Xr paxctl 8 .

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