Document CTL_PROC, the core filename format it core(5), and xref sysctl(8),
sysctl(3), core(5) in various place. Document 'options DEFCORENAME' inj options(4) and $defcorename in rc.conf(5).
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bouyer
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@ -1,4 +1,4 @@
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.\" $NetBSD: sysctl.3,v 1.37 1999/09/27 16:24:40 kleink Exp $
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.\" $NetBSD: sysctl.3,v 1.38 1999/09/28 14:52:32 bouyer Exp $
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.\"
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.\" Copyright (c) 1993
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.\" The Regents of the University of California. All rights reserved.
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@ -127,6 +127,7 @@ listed here, and described in separate sections below.
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.It CTL\_KERN sys/sysctl.h High kernel limits
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.It CTL\_MACHDEP sys/sysctl.h Machine dependent
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.It CTL\_NET sys/socket.h Networking
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.It CTL\_PROC sys/sysctl.h Per-process
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.It CTL\_USER sys/sysctl.h User-level
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.It CTL\_VM vm/vm_param.h Virtual memory
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.El
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@ -255,6 +256,7 @@ information.
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.It KERN\_BOOTTIME struct timeval no
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.It KERN\_CHOWN\_RESTRICTED integer no
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.It KERN\_CLOCKRATE struct clockinfo no
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.It KERN\_DEFCORENAME string yes
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.It KERN\_DOMAINNAME string yes
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.It KERN\_FILE struct file no
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.It KERN\_FSYNC integer no
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@ -289,7 +291,6 @@ information.
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.It KERN\_RAWPARTITION integer no
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.It KERN\_SAVED\_IDS integer no
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.It KERN\_SECURELVL integer raise only
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.It KERN\_SHORTCORENAME integer yes
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.It KERN\_SYNCHRONIZED\_IO integer no
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.It KERN\_SYSVMSG integer no
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.It KERN\_SYSVSEM integer no
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@ -327,6 +328,17 @@ structure is returned.
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This structure contains the clock, statistics clock and profiling clock
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frequencies, the number of micro-seconds per hz tick, and the clock
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skew rate.
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.It Li KERN_DEFCORENAME
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Default template for the name of core dump files (see also PROC_PID_CORENAME
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in the per-process variables CTL_PROC, and
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.Xr core 5
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for format of this template). The default value is
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.Nm %n.core
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and can be changed with the kernel configuration option
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.Cd options DEFCORENAME
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(see
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.Xr options 4
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).
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.It Li KERN_DOMAINNAME
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Get or set the YP domain name.
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.It Li KERN_FILE
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@ -470,17 +482,6 @@ Returns 1 if saved set-group and saved set-user ID is available.
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The system security level.
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This level may be raised by processes with appropriate privilege.
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It may only be lowered by process 1.
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.It Li KERN_SHORTCORENAME
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Whether core dumps are named
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.Nm programname.core
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(default, value 0) or
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.Nm core
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(value 1).
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The default value can be changed to 1 with the kernel configuration option
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.Cd options SHORTCORENAME
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(see
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.Xr options 4 ,
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.Xr core 5 ).
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.It Li KERN_SYNCHRONIZED_IO
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Returns 1 if the POSIX 1003.1b Synchronized I/O Option is available
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on this system,
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@ -721,6 +722,79 @@ Returns the default UDP send buffer size.
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Returns the default UDP receive buffer size.
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.El
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.El
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.Sh CTL_PROC
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The string and integer information available for the CTL_PROC
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is detailed below.
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The changeable column shows whether a process with appropriate
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privilege may change the value.
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These values are per-process, and as such may change from one process
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to another. When a process is created, the default values are inherited from
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its parent. When a set-user-ID or set-group-ID binary is executed, the
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value of PROC_PID_CORENAME is reset to the system default value.
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The second level name is either the magic value PROC_CURPROC, which
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points to the current process, or the PID of the target process.
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.Bl -column "USER_COLL_WEIGHTS_MAXXXX" "integerXXX" "yes" -offset indent
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.It Sy Pa Third level name Type Changeable
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.It PROC\_PID\_CORENAME string yes
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.It PROC\_PID\_LIMIT node not applicable
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.El
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.Bl -tag -width "123456"
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.Pp
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.It Li PROC_PID_CORENAME
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The template used for the core dump file name (see
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.Xr core 5
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for details). The base name must either be
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.Nm core
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or end with the suffix ``.core'' (the super-user may set arbitrary names). By
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default it points to KERN_DEFCORENAME.
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.It Li PROC_PID_LIMIT
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Return resources limits, as defined for the
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.Xr getrlimit 2
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and
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.Xr setrlimit 2
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system calls.
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The fourth level name is one of:
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.Bl -tag -width PROC_PID_LIMIT_MEMLOCKAA
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.It Li PROC_PID_LIMIT_CPU
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The maximum amount of cpu time (in seconds) to be used by each process.
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.It Li PROC_PID_LIMIT_FSIZE
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The largest size (in bytes) file that may be created.
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.It Li PROC_PID_LIMIT_DATA
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The maximum size (in bytes) of the data segment for a process;
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this defines how far a program may extend its break with the
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.Xr sbrk 2
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system call.
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.It Li PROC_PID_LIMIT_STACK
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The maximum size (in bytes) of the stack segment for a process;
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this defines how far a program's stack segment may be extended.
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Stack extension is performed automatically by the system.
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.It Li PROC_PID_LIMIT_CORE
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The largest size (in bytes)
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.Pa core
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file that may be created.
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.It Li PROC_PID_LIMIT_RSS
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The maximum size (in bytes) to which a process's resident set size may
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grow.
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This imposes a limit on the amount of physical memory to be given to
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a process; if memory is tight, the system will prefer to take memory
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from processes that are exceeding their declared resident set size.
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.It Li PROC_PID_LIMIT_MEMLOCK
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The maximum size (in bytes) which a process may lock into memory
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using the
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.Xr mlock 2
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function.
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.It Li PROC_PID_LIMIT_NPROC
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The maximum number of simultaneous processes for this user id.
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.It Li PROC_PID_LIMIT_NOFILE
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The maximum number of open files for this process.
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.El
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.Pp
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The fifth level name is one of PROC_PID_LIMIT_TYPE_SOFT or
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PROC_PID_LIMIT_TYPE_HARD, to select respectively the soft or hard limit.
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Both are of type integer.
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.El
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.Pp
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.Sh CTL_USER
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The string and integer information available for the CTL_USER level
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is detailed below.
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@ -1,4 +1,4 @@
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.\" $NetBSD: getrlimit.2,v 1.13 1999/03/22 19:45:04 garbled Exp $
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.\" $NetBSD: getrlimit.2,v 1.14 1999/09/28 14:52:33 bouyer Exp $
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.\"
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.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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@ -54,7 +54,9 @@ and each process it creates may be obtained with the
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.Fn getrlimit
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call, and set with the
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.Fn setrlimit
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call.
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call. Resources of an arbitrary process can be obtained/changed using
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.Xr sysctl 3 .
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..
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.Pp
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The
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.Fa resource
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@ -1,4 +1,4 @@
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.\" $NetBSD: options.4,v 1.87 1999/09/24 17:18:14 itojun Exp $
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.\" $NetBSD: options.4,v 1.88 1999/09/28 14:52:33 bouyer Exp $
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.\"
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.\" Copyright (c) 1996
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.\" Perry E. Metzger. All rights reserved.
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@ -837,18 +837,16 @@ to a value less than
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.Em CHILD_MAX
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is not permitted, as this would result in a violation of the semantics of
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.St -p1003.1-90 .
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.It Cd options SHORTCORENAME
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If set, process core dumps are named
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.Nm core .
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If not specified, they are named
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.Nm programname.core
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(the default in 4.4BSD). Note that this changes the value of the
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.Em kern.shortcorename
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sysctl variable which may be changed at run time. See
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.It Cd options DEFCORENAME=string
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Sets the default value of the
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.Em kern.defcorename
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sysctl variable, otherwise it is set to
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.Nm %n.core .
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See
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.Xr sysctl 8
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and
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.Xr sysctl 3
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for details.
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for details.
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.El
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.Ss Networking Options
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.Bl -ohang
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@ -1,4 +1,4 @@
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.\" $NetBSD: core.5,v 1.8 1999/03/17 20:19:44 garbled Exp $
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.\" $NetBSD: core.5,v 1.9 1999/09/28 14:52:33 bouyer Exp $
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.\"
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.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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@ -47,33 +47,49 @@ also cause a record of the process's in-core state to be written
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to disk for later examination by one of the available debuggers.
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(See
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.Xr sigaction 2 . )
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This memory image is written to a file
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in the working directory;
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provided the terminated process had write permission in the directory,
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and provided the abnormality did not cause
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a system crash.
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This memory image is written to a file named from a per-process template;
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provided the terminated process had write permission, and provided the
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abnormality did not cause a system crash.
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(In this event, the decision to save the core file is arbitrary, see
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.Xr savecore 8 . )
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The file is normally named
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.Nm programname.core ,
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but is called
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.Nm core
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if the
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kernel configuration option
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.Cd options SHORTCORENAME
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is defined or the sysctl variable
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.Em kern.shortcorename
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is set to 1.
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The file is named from a per-process template, mapped to the sysctl
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variable
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.Em proc.<pid>.corename
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(where <pid> has to be remplaced by the pid in decimal format of the
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process).
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This template is either an absolute or relative path name, in which format
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characters can be used, preceeded by the percent character (``%'').
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The following characters are recognised as format and subsitued:
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.Bl -column "cAA" "The process's creation date (in seconds)xxx" -offset indent
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.It Li n The process's name
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.It Li p The PID of the process (in decimal)
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.It Li t The process's creation date (a la
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.Xr time 3 ,
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in decimal)
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.It Li u The login name, as returned by
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.Xr getlogin 2
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.El
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.Pp
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The maximum size of a
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.Nm programname.core
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file is limited by
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By default, the per-process template string points to the default core name
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template, which is mapped to the sysctl variable
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.Em kern.defcorename .
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Changing this value on a live system will change the core name template for
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all processes which didn't have a per-process template set.
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The default value of the default core name template is
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.Nm %n.core
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and can be changed at compile-time with the kernel configuration option
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.Cd options DEFCORENAME
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(see
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.Xr options 4 )
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.Pp
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The per-process template string is inherited on process creation, but is reset
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to point to the default core name template on execution of a set-id binary.
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.Pp
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The maximum size of a core file is limited by
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.Xr setrlimit 2 .
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Files which would be larger than the limit are not created.
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.Pp
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The
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.Nm programname.core
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file consists of the
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The core file consists of the
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.Fa u. area ,
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whose size (in pages) is defined by the
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.Dv UPAGES
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@ -85,13 +101,9 @@ starts with a
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.Fa user
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structure as given in
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.Aq Pa sys/user.h .
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The remainder of the
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.Nm programname.core
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file consists of the data pages followed by
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The remainder of the core file consists of the data pages followed by
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the stack pages of the process image.
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The amount of data space image in the
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.Nm programname.core
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file is given (in pages) by the
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The amount of data space image in the core file is given (in pages) by the
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variable
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.Fa u_dsize
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in the
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@ -109,6 +121,8 @@ The size of a ``page'' is given by the constant
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.Xr gdb 1 ,
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.Xr sigaction 2 ,
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.Xr setrlimit 2
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.Xr sysctl 3 ,
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.Xr sysctl 8
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.Sh HISTORY
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A
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.Nm core
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@ -1,4 +1,4 @@
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.\" $NetBSD: rc.conf.5,v 1.25 1999/09/03 14:36:43 itojun Exp $
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.\" $NetBSD: rc.conf.5,v 1.26 1999/09/28 14:52:33 bouyer Exp $
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.\"
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.\" Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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@ -170,6 +170,17 @@ version string in the
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file to reflect the version of the running kernel.
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See
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.Xr motd 5 .
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.It Sy defcorename
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A string.
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This sets the default core name template, from which are derived core dump
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files names. The template can include format charaters which are dynamically
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interpreted. See
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.Xr core 5
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for details of the format.
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If set to nothing, the default compiled-in value is keept (see
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.Xr options 4 ,
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.Xr sysctl 3
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).
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.El
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.Pp
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.Ss System security setting:
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