Index: stable/12/lib/libc/gen/sysctl.3 =================================================================== --- stable/12/lib/libc/gen/sysctl.3 (revision 345825) +++ stable/12/lib/libc/gen/sysctl.3 (revision 345826) @@ -1,866 +1,874 @@ .\" Copyright (c) 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)sysctl.3 8.4 (Berkeley) 5/9/95 .\" $FreeBSD$ .\" -.Dd October 22, 2017 +.Dd March 22, 2019 .Dt SYSCTL 3 .Os .Sh NAME .Nm sysctl , .Nm sysctlbyname , .Nm sysctlnametomib .Nd get or set system information .Sh LIBRARY .Lb libc .Sh SYNOPSIS .In sys/types.h .In sys/sysctl.h .Ft int .Fn sysctl "const int *name" "u_int namelen" "void *oldp" "size_t *oldlenp" "const void *newp" "size_t newlen" .Ft int .Fn sysctlbyname "const char *name" "void *oldp" "size_t *oldlenp" "const void *newp" "size_t newlen" .Ft int .Fn sysctlnametomib "const char *name" "int *mibp" "size_t *sizep" .Sh DESCRIPTION The .Fn sysctl function retrieves system information and allows processes with appropriate privileges to set system information. The information available from .Fn sysctl consists of integers, strings, and tables. Information may be retrieved and set from the command interface using the .Xr sysctl 8 utility. .Pp Unless explicitly noted below, .Fn sysctl returns a consistent snapshot of the data requested. Consistency is obtained by locking the destination buffer into memory so that the data may be copied out without blocking. Calls to .Fn sysctl are serialized to avoid deadlock. .Pp The state is described using a ``Management Information Base'' (MIB) style name, listed in .Fa name , which is a .Fa namelen length array of integers. .Pp The .Fn sysctlbyname function accepts an ASCII representation of the name and internally looks up the integer name vector. Apart from that, it behaves the same as the standard .Fn sysctl function. .Pp The information is copied into the buffer specified by .Fa oldp . The size of the buffer is given by the location specified by .Fa oldlenp before the call, and that location gives the amount of data copied after a successful call and after a call that returns with the error code .Er ENOMEM . If the amount of data available is greater than the size of the buffer supplied, the call supplies as much data as fits in the buffer provided and returns with the error code .Er ENOMEM . If the old value is not desired, .Fa oldp and .Fa oldlenp should be set to NULL. .Pp The size of the available data can be determined by calling .Fn sysctl with the .Dv NULL argument for .Fa oldp . The size of the available data will be returned in the location pointed to by .Fa oldlenp . For some operations, the amount of space may change often. For these operations, the system attempts to round up so that the returned size is large enough for a call to return the data shortly thereafter. .Pp To set a new value, .Fa newp is set to point to a buffer of length .Fa newlen from which the requested value is to be taken. If a new value is not to be set, .Fa newp should be set to NULL and .Fa newlen set to 0. .Pp The .Fn sysctlnametomib function accepts an ASCII representation of the name, looks up the integer name vector, and returns the numeric representation in the mib array pointed to by .Fa mibp . The number of elements in the mib array is given by the location specified by .Fa sizep before the call, and that location gives the number of entries copied after a successful call. The resulting .Fa mib and .Fa size may be used in subsequent .Fn sysctl calls to get the data associated with the requested ASCII name. This interface is intended for use by applications that want to repeatedly request the same variable (the .Fn sysctl function runs in about a third the time as the same request made via the .Fn sysctlbyname function). The .Fn sysctlnametomib function is also useful for fetching mib prefixes and then adding a final component. For example, to fetch process information for processes with pid's less than 100: .Pp .Bd -literal -offset indent -compact int i, mib[4]; size_t len; struct kinfo_proc kp; /* Fill out the first three components of the mib */ len = 4; sysctlnametomib("kern.proc.pid", mib, &len); /* Fetch and print entries for pid's < 100 */ for (i = 0; i < 100; i++) { mib[3] = i; len = sizeof(kp); if (sysctl(mib, 4, &kp, &len, NULL, 0) == -1) perror("sysctl"); else if (len > 0) printkproc(&kp); } .Ed .Pp The top level names are defined with a CTL_ prefix in .In sys/sysctl.h , and are as follows. The next and subsequent levels down are found in the include files listed here, and described in separate sections below. .Bl -column CTLXMACHDEPXXX "Next Level NamesXXXXXX" -offset indent .It Sy Name Ta Sy Next Level Names Ta Sy Description .It Dv CTL_DEBUG Ta In sys/sysctl.h Ta Debugging .It Dv CTL_VFS Ta In sys/mount.h Ta File system .It Dv CTL_HW Ta In sys/sysctl.h Ta Generic CPU, I/O .It Dv CTL_KERN Ta In sys/sysctl.h Ta High kernel limits .It Dv CTL_MACHDEP Ta In sys/sysctl.h Ta Machine dependent .It Dv CTL_NET Ta In sys/socket.h Ta Networking .It Dv CTL_USER Ta In sys/sysctl.h Ta User-level .It Dv CTL_VM Ta In vm/vm_param.h Ta Virtual memory .El .Pp For example, the following retrieves the maximum number of processes allowed in the system: .Pp .Bd -literal -offset indent -compact int mib[2], maxproc; size_t len; mib[0] = CTL_KERN; mib[1] = KERN_MAXPROC; len = sizeof(maxproc); sysctl(mib, 2, &maxproc, &len, NULL, 0); .Ed .Pp To retrieve the standard search path for the system utilities: .Pp .Bd -literal -offset indent -compact int mib[2]; size_t len; char *p; mib[0] = CTL_USER; mib[1] = USER_CS_PATH; sysctl(mib, 2, NULL, &len, NULL, 0); p = malloc(len); sysctl(mib, 2, p, &len, NULL, 0); .Ed .Ss CTL_DEBUG The debugging variables vary from system to system. A debugging variable may be added or deleted without need to recompile .Fn sysctl to know about it. Each time it runs, .Fn sysctl gets the list of debugging variables from the kernel and displays their current values. The system defines twenty .Pq Vt "struct ctldebug" variables named .Va debug0 through .Va debug19 . They are declared as separate variables so that they can be individually initialized at the location of their associated variable. The loader prevents multiple use of the same variable by issuing errors if a variable is initialized in more than one place. For example, to export the variable .Va dospecialcheck as a debugging variable, the following declaration would be used: .Pp .Bd -literal -offset indent -compact int dospecialcheck = 1; struct ctldebug debug5 = { "dospecialcheck", &dospecialcheck }; .Ed .Ss CTL_VFS A distinguished second level name, VFS_GENERIC, is used to get general information about all file systems. One of its third level identifiers is VFS_MAXTYPENUM that gives the highest valid file system type number. Its other third level identifier is VFS_CONF that returns configuration information about the file system type given as a fourth level identifier (see .Xr getvfsbyname 3 as an example of its use). The remaining second level identifiers are the file system type number returned by a .Xr statfs 2 call or from VFS_CONF. The third level identifiers available for each file system are given in the header file that defines the mount argument structure for that file system. .Ss CTL_HW The string and integer information available for the CTL_HW level is detailed below. The changeable column shows whether a process with appropriate privilege may change the value. .Bl -column "Second Level Name" integerXXX Changeable -offset indent .It Sy Second Level Name Ta Sy Type Ta Sy Changeable .It Dv HW_MACHINE Ta string Ta no .It Dv HW_MODEL Ta string Ta no .It Dv HW_NCPU Ta integer Ta no .It Dv HW_BYTEORDER Ta integer Ta no .It Dv HW_PHYSMEM Ta integer Ta no .It Dv HW_USERMEM Ta integer Ta no .It Dv HW_PAGESIZE Ta integer Ta no .\".It Dv HW_DISKNAMES Ta integer Ta no .\".It Dv HW_DISKSTATS Ta integer Ta no .It Dv HW_FLOATINGPT Ta integer Ta no .It Dv HW_MACHINE_ARCH Ta string Ta no .It Dv HW_REALMEM Ta integer Ta no +.It Dv HW_AVAILPAGES Ta integer Ta no .El .Bl -tag -width 6n .It Li HW_MACHINE The machine class. .It Li HW_MODEL The machine model .It Li HW_NCPU The number of cpus. .It Li HW_BYTEORDER The byteorder (4321 or 1234). .It Li HW_PHYSMEM -The bytes of physical memory. +Amount of physical memory (in bytes), minus the amount used by the kernel, +pre-loaded modules, and (on x86) the dcons buffer. .It Li HW_USERMEM -The bytes of non-kernel memory. +Amount of memory (in bytes) which is not wired. .It Li HW_PAGESIZE The software page size. .\".It Fa HW_DISKNAMES .\".It Fa HW_DISKSTATS .It Li HW_FLOATINGPT Nonzero if the floating point support is in hardware. .It Li HW_MACHINE_ARCH The machine dependent architecture type. .It Li HW_REALMEM -The bytes of real memory. +Amount of memory (in bytes) reported by the firmware. +That value is sometimes not sane; in that case, the kernel reports the max +memory address instead. +.It Li HW_AVAILPAGES +The same value as +.Li HW_PHYSMEM , +measured in pages rather than bytes. .El .Ss CTL_KERN The string and integer information available for the CTL_KERN level is detailed below. The changeable column shows whether a process with appropriate privilege may change the value. The types of data currently available are process information, system vnodes, the open file entries, routing table entries, virtual memory statistics, load average history, and clock rate information. .Bl -column "KERNXMAXFILESPERPROCXXX" "struct clockrateXXX" -offset indent .It Sy Second Level Name Ta Sy Type Ta Sy Changeable .It Dv KERN_ARGMAX Ta integer Ta no .It Dv KERN_BOOTFILE Ta string Ta yes .It Dv KERN_BOOTTIME Ta struct timeval Ta no .It Dv KERN_CLOCKRATE Ta struct clockinfo Ta no .It Dv KERN_FILE Ta struct xfile Ta no .It Dv KERN_HOSTID Ta integer Ta yes .It Dv KERN_HOSTUUID Ta string Ta yes .It Dv KERN_HOSTNAME Ta string Ta yes .It Dv KERN_JOB_CONTROL Ta integer Ta no .It Dv KERN_MAXFILES Ta integer Ta yes .It Dv KERN_MAXFILESPERPROC Ta integer Ta yes .It Dv KERN_MAXPROC Ta integer Ta no .It Dv KERN_MAXPROCPERUID Ta integer Ta yes .It Dv KERN_MAXVNODES Ta integer Ta yes .It Dv KERN_NGROUPS Ta integer Ta no .It Dv KERN_NISDOMAINNAME Ta string Ta yes .It Dv KERN_OSRELDATE Ta integer Ta no .It Dv KERN_OSRELEASE Ta string Ta no .It Dv KERN_OSREV Ta integer Ta no .It Dv KERN_OSTYPE Ta string Ta no .It Dv KERN_POSIX1 Ta integer Ta no .It Dv KERN_PROC Ta node Ta not applicable .It Dv KERN_PROF Ta node Ta not applicable .It Dv KERN_QUANTUM Ta integer Ta yes .It Dv KERN_SAVED_IDS Ta integer Ta no .It Dv KERN_SECURELVL Ta integer Ta raise only .It Dv KERN_UPDATEINTERVAL Ta integer Ta no .It Dv KERN_VERSION Ta string Ta no .It Dv KERN_VNODE Ta struct xvnode Ta no .El .Bl -tag -width 6n .It Li KERN_ARGMAX The maximum bytes of argument to .Xr execve 2 . .It Li KERN_BOOTFILE The full pathname of the file from which the kernel was loaded. .It Li KERN_BOOTTIME A .Va struct timeval structure is returned. This structure contains the time that the system was booted. .It Li KERN_CLOCKRATE A .Va struct clockinfo structure is returned. This structure contains the clock, statistics clock and profiling clock frequencies, the number of micro-seconds per hz tick and the skew rate. .It Li KERN_FILE Return the entire file table. The returned data consists of an array of .Va struct xfile , whose size depends on the current number of such objects in the system. .It Li KERN_HOSTID Get or set the host ID. .It Li KERN_HOSTUUID Get or set the host's universally unique identifier (UUID). .It Li KERN_HOSTNAME Get or set the hostname. .It Li KERN_JOB_CONTROL Return 1 if job control is available on this system, otherwise 0. .It Li KERN_MAXFILES The maximum number of files that may be open in the system. .It Li KERN_MAXFILESPERPROC The maximum number of files that may be open for a single process. This limit only applies to processes with an effective uid of nonzero at the time of the open request. Files that have already been opened are not affected if the limit or the effective uid is changed. .It Li KERN_MAXPROC The maximum number of concurrent processes the system will allow. .It Li KERN_MAXPROCPERUID The maximum number of concurrent processes the system will allow for a single effective uid. This limit only applies to processes with an effective uid of nonzero at the time of a fork request. Processes that have already been started are not affected if the limit is changed. .It Li KERN_MAXVNODES The maximum number of vnodes available on the system. .It Li KERN_NGROUPS The maximum number of supplemental groups. .It Li KERN_NISDOMAINNAME The name of the current YP/NIS domain. .It Li KERN_OSRELDATE The kernel release version in the format .Ar M Ns Ar mm Ns Ar R Ns Ar xx , where .Ar M is the major version, .Ar mm is the two digit minor version, .Ar R is 0 if release branch, otherwise 1, and .Ar xx is updated when the available APIs change. .Pp The userland release version is available from .In osreldate.h ; parse this file if you need to get the release version of the currently installed userland. .It Li KERN_OSRELEASE The system release string. .It Li KERN_OSREV The system revision string. .It Li KERN_OSTYPE The system type string. .It Li KERN_POSIX1 The version of .St -p1003.1 with which the system attempts to comply. .It Li KERN_PROC Return selected information about specific running processes. .Pp For the following names, an array of .Va struct kinfo_proc structures is returned, whose size depends on the current number of such objects in the system. .Bl -column "Third Level NameXXXXXX" "Fourth LevelXXXXXX" -offset indent .It Sy Third Level Name Ta Sy Fourth Level .It Dv KERN_PROC_ALL Ta None .It Dv KERN_PROC_PID Ta A process ID .It Dv KERN_PROC_PGRP Ta A process group .It Dv KERN_PROC_TTY Ta A tty device .It Dv KERN_PROC_UID Ta A user ID .It Dv KERN_PROC_RUID Ta A real user ID .El .Pp If the third level name is .Dv KERN_PROC_ARGS then the command line argument array is returned in a flattened form, i.e., zero-terminated arguments follow each other. The total size of array is returned. It is also possible for a process to set its own process title this way. If the third level name is .Dv KERN_PROC_PATHNAME , the path of the process' text file is stored. For .Dv KERN_PROC_PATHNAME , a process ID of .Li \-1 implies the current process. .Bl -column "Third Level NameXXXXXX" "Fourth LevelXXXXXX" -offset indent .It Sy Third Level Name Ta Sy Fourth Level .It Dv KERN_PROC_ARGS Ta "A process ID" .It Dv KERN_PROC_PATHNAME Ta "A process ID" .El .It Li KERN_PROF Return profiling information about the kernel. If the kernel is not compiled for profiling, attempts to retrieve any of the KERN_PROF values will fail with .Er ENOENT . The third level names for the string and integer profiling information is detailed below. The changeable column shows whether a process with appropriate privilege may change the value. .Bl -column "GPROFXGMONPARAMXXX" "struct gmonparamXXX" -offset indent .It Sy Third Level Name Ta Sy Type Ta Sy Changeable .It Dv GPROF_STATE Ta integer Ta yes .It Dv GPROF_COUNT Ta u_short[\|] Ta yes .It Dv GPROF_FROMS Ta u_short[\|] Ta yes .It Dv GPROF_TOS Ta struct tostruct Ta yes .It Dv GPROF_GMONPARAM Ta struct gmonparam Ta no .El .Pp The variables are as follows: .Bl -tag -width 6n .It Li GPROF_STATE Returns GMON_PROF_ON or GMON_PROF_OFF to show that profiling is running or stopped. .It Li GPROF_COUNT Array of statistical program counter counts. .It Li GPROF_FROMS Array indexed by program counter of call-from points. .It Li GPROF_TOS Array of .Va struct tostruct describing destination of calls and their counts. .It Li GPROF_GMONPARAM Structure giving the sizes of the above arrays. .El .It Li KERN_QUANTUM The maximum period of time, in microseconds, for which a process is allowed to run without being preempted if other processes are in the run queue. .It Li KERN_SAVED_IDS Returns 1 if saved set-group and saved set-user ID is available. .It Li KERN_SECURELVL The system security level. This level may be raised by processes with appropriate privilege. It may not be lowered. .It Li KERN_VERSION The system version string. .It Li KERN_VNODE Return the entire vnode table. Note, the vnode table is not necessarily a consistent snapshot of the system. The returned data consists of an array whose size depends on the current number of such objects in the system. Each element of the array consists of a .Va struct xvnode . .El .Ss CTL_NET The string and integer information available for the CTL_NET level is detailed below. The changeable column shows whether a process with appropriate privilege may change the value. .Bl -column "Second Level NameXXXXXX" "routing messagesXXX" -offset indent .It Sy Second Level Name Ta Sy Type Ta Sy Changeable .It Dv PF_ROUTE Ta routing messages Ta no .It Dv PF_INET Ta IPv4 values Ta yes .It Dv PF_INET6 Ta IPv6 values Ta yes .El .Bl -tag -width 6n .It Li PF_ROUTE Return the entire routing table or a subset of it. The data is returned as a sequence of routing messages (see .Xr route 4 for the header file, format and meaning). The length of each message is contained in the message header. .Pp The third level name is a protocol number, which is currently always 0. The fourth level name is an address family, which may be set to 0 to select all address families. The fifth, sixth, and seventh level names are as follows: .Bl -column -offset indent "Fifth Level" "Sixth Level" "Seventh Level" .It Sy Fifth level Ta Sy Sixth Level Ta Sy Seventh Level .It Dv NET_RT_FLAGS Ta rtflags Ta None .It Dv NET_RT_DUMP Ta None Ta None or fib number .It Dv NET_RT_IFLIST Ta 0 or if_index Ta None .It Dv NET_RT_IFMALIST Ta 0 or if_index Ta None .It Dv NET_RT_IFLISTL Ta 0 or if_index Ta None .El .Pp The .Dv NET_RT_IFMALIST name returns information about multicast group memberships on all interfaces if 0 is specified, or for the interface specified by .Va if_index . .Pp The .Dv NET_RT_IFLISTL is like .Dv NET_RT_IFLIST , just returning message header structs with additional fields allowing the interface to be extended without breaking binary compatibility. The .Dv NET_RT_IFLISTL uses 'l' versions of the message header structures: .Va struct if_msghdrl and .Va struct ifa_msghdrl . .It Li PF_INET Get or set various global information about the IPv4 (Internet Protocol version 4). The third level name is the protocol. The fourth level name is the variable name. The currently defined protocols and names are: .Bl -column ProtocolXX VariableXX TypeXX ChangeableXX .It Sy Protocol Ta Sy Variable Ta Sy Type Ta Sy Changeable .It icmp Ta bmcastecho Ta integer Ta yes .It icmp Ta maskrepl Ta integer Ta yes .It ip Ta forwarding Ta integer Ta yes .It ip Ta redirect Ta integer Ta yes .It ip Ta ttl Ta integer Ta yes .It udp Ta checksum Ta integer Ta yes .El .Pp The variables are as follows: .Bl -tag -width 6n .It Li icmp.bmcastecho Returns 1 if an ICMP echo request to a broadcast or multicast address is to be answered. .It Li icmp.maskrepl Returns 1 if ICMP network mask requests are to be answered. .It Li ip.forwarding Returns 1 when IP forwarding is enabled for the host, meaning that the host is acting as a router. .It Li ip.redirect Returns 1 when ICMP redirects may be sent by the host. This option is ignored unless the host is routing IP packets, and should normally be enabled on all systems. .It Li ip.ttl The maximum time-to-live (hop count) value for an IP packet sourced by the system. This value applies to normal transport protocols, not to ICMP. .It Li udp.checksum Returns 1 when UDP checksums are being computed and checked. Disabling UDP checksums is strongly discouraged. .Pp For variables net.inet.*.ipsec, please refer to .Xr ipsec 4 . .El .It Li PF_INET6 Get or set various global information about the IPv6 (Internet Protocol version 6). The third level name is the protocol. The fourth level name is the variable name. .Pp For variables net.inet6.* please refer to .Xr inet6 4 . For variables net.inet6.*.ipsec6, please refer to .Xr ipsec 4 . .El .Ss CTL_USER The string and integer information available for the CTL_USER level is detailed below. The changeable column shows whether a process with appropriate privilege may change the value. .Bl -column "USER_COLL_WEIGHTS_MAXXXX" "integerXXX" -offset indent .It Sy Second Level Name Ta Sy Type Ta Sy Changeable .It Dv USER_BC_BASE_MAX Ta integer Ta no .It Dv USER_BC_DIM_MAX Ta integer Ta no .It Dv USER_BC_SCALE_MAX Ta integer Ta no .It Dv USER_BC_STRING_MAX Ta integer Ta no .It Dv USER_COLL_WEIGHTS_MAX Ta integer Ta no .It Dv USER_CS_PATH Ta string Ta no .It Dv USER_EXPR_NEST_MAX Ta integer Ta no .It Dv USER_LINE_MAX Ta integer Ta no .It Dv USER_POSIX2_CHAR_TERM Ta integer Ta no .It Dv USER_POSIX2_C_BIND Ta integer Ta no .It Dv USER_POSIX2_C_DEV Ta integer Ta no .It Dv USER_POSIX2_FORT_DEV Ta integer Ta no .It Dv USER_POSIX2_FORT_RUN Ta integer Ta no .It Dv USER_POSIX2_LOCALEDEF Ta integer Ta no .It Dv USER_POSIX2_SW_DEV Ta integer Ta no .It Dv USER_POSIX2_UPE Ta integer Ta no .It Dv USER_POSIX2_VERSION Ta integer Ta no .It Dv USER_RE_DUP_MAX Ta integer Ta no .It Dv USER_STREAM_MAX Ta integer Ta no .It Dv USER_TZNAME_MAX Ta integer Ta no .El .Bl -tag -width 6n .It Li USER_BC_BASE_MAX The maximum ibase/obase values in the .Xr bc 1 utility. .It Li USER_BC_DIM_MAX The maximum array size in the .Xr bc 1 utility. .It Li USER_BC_SCALE_MAX The maximum scale value in the .Xr bc 1 utility. .It Li USER_BC_STRING_MAX The maximum string length in the .Xr bc 1 utility. .It Li USER_COLL_WEIGHTS_MAX The maximum number of weights that can be assigned to any entry of the LC_COLLATE order keyword in the locale definition file. .It Li USER_CS_PATH Return a value for the .Ev PATH environment variable that finds all the standard utilities. .It Li USER_EXPR_NEST_MAX The maximum number of expressions that can be nested within parenthesis by the .Xr expr 1 utility. .It Li USER_LINE_MAX The maximum length in bytes of a text-processing utility's input line. .It Li USER_POSIX2_CHAR_TERM Return 1 if the system supports at least one terminal type capable of all operations described in .St -p1003.2 , otherwise 0. .It Li USER_POSIX2_C_BIND Return 1 if the system's C-language development facilities support the C-Language Bindings Option, otherwise 0. .It Li USER_POSIX2_C_DEV Return 1 if the system supports the C-Language Development Utilities Option, otherwise 0. .It Li USER_POSIX2_FORT_DEV Return 1 if the system supports the FORTRAN Development Utilities Option, otherwise 0. .It Li USER_POSIX2_FORT_RUN Return 1 if the system supports the FORTRAN Runtime Utilities Option, otherwise 0. .It Li USER_POSIX2_LOCALEDEF Return 1 if the system supports the creation of locales, otherwise 0. .It Li USER_POSIX2_SW_DEV Return 1 if the system supports the Software Development Utilities Option, otherwise 0. .It Li USER_POSIX2_UPE Return 1 if the system supports the User Portability Utilities Option, otherwise 0. .It Li USER_POSIX2_VERSION The version of .St -p1003.2 with which the system attempts to comply. .It Li USER_RE_DUP_MAX The maximum number of repeated occurrences of a regular expression permitted when using interval notation. .It Li USER_STREAM_MAX The minimum maximum number of streams that a process may have open at any one time. .It Li USER_TZNAME_MAX The minimum maximum number of types supported for the name of a timezone. .El .Ss CTL_VM The string and integer information available for the CTL_VM level is detailed below. The changeable column shows whether a process with appropriate privilege may change the value. .Bl -column "Second Level NameXXXXXX" "struct loadavgXXX" -offset indent .It Sy Second Level Name Ta Sy Type Ta Sy Changeable .It Dv VM_LOADAVG Ta struct loadavg Ta no .It Dv VM_TOTAL Ta struct vmtotal Ta no .It Dv VM_SWAPPING_ENABLED Ta integer Ta maybe .It Dv VM_V_FREE_MIN Ta integer Ta yes .It Dv VM_V_FREE_RESERVED Ta integer Ta yes .It Dv VM_V_FREE_TARGET Ta integer Ta yes .It Dv VM_V_INACTIVE_TARGET Ta integer Ta yes .It Dv VM_V_PAGEOUT_FREE_MIN Ta integer Ta yes .It Dv VM_OVERCOMMIT Ta integer Ta yes .El .Bl -tag -width 6n .It Li VM_LOADAVG Return the load average history. The returned data consists of a .Va struct loadavg . .It Li VM_TOTAL Return the system wide virtual memory statistics. The returned data consists of a .Va struct vmtotal . .It Li VM_SWAPPING_ENABLED 1 if process swapping is enabled or 0 if disabled. This variable is permanently set to 0 if the kernel was built with swapping disabled. .It Li VM_V_FREE_MIN Minimum amount of memory (cache memory plus free memory) required to be available before a process waiting on memory will be awakened. .It Li VM_V_FREE_RESERVED Processes will awaken the pageout daemon and wait for memory if the number of free and cached pages drops below this value. .It Li VM_V_FREE_TARGET The total amount of free memory (including cache memory) that the pageout daemon tries to maintain. .It Li VM_V_INACTIVE_TARGET The desired number of inactive pages that the pageout daemon should achieve when it runs. Inactive pages can be quickly inserted into process address space when needed. .It Li VM_V_PAGEOUT_FREE_MIN If the amount of free and cache memory falls below this value, the pageout daemon will enter "memory conserving mode" to avoid deadlock. .It Li VM_OVERCOMMIT Overcommit behaviour, as described in .Xr tuning 7 . .El .Sh RETURN VALUES .Rv -std .Sh FILES .Bl -tag -width -compact .It In sys/sysctl.h definitions for top level identifiers, second level kernel and hardware identifiers, and user level identifiers .It In sys/socket.h definitions for second level network identifiers .It In sys/gmon.h definitions for third level profiling identifiers .It In vm/vm_param.h definitions for second level virtual memory identifiers .It In netinet/in.h definitions for third level IPv4/IPv6 identifiers and fourth level IPv4/v6 identifiers .It In netinet/icmp_var.h definitions for fourth level ICMP identifiers .It In netinet/icmp6.h definitions for fourth level ICMPv6 identifiers .It In netinet/udp_var.h definitions for fourth level UDP identifiers .El .Sh ERRORS The following errors may be reported: .Bl -tag -width Er .It Bq Er EFAULT The buffer .Fa name , .Fa oldp , .Fa newp , or length pointer .Fa oldlenp contains an invalid address. .It Bq Er EINVAL The .Fa name array is less than two or greater than CTL_MAXNAME. .It Bq Er EINVAL A non-null .Fa newp is given and its specified length in .Fa newlen is too large or too small. .It Bq Er ENOMEM The length pointed to by .Fa oldlenp is too short to hold the requested value. .It Bq Er ENOMEM The smaller of either the length pointed to by .Fa oldlenp or the estimated size of the returned data exceeds the system limit on locked memory. .It Bq Er ENOMEM Locking the buffer .Fa oldp , or a portion of the buffer if the estimated size of the data to be returned is smaller, would cause the process to exceed its per-process locked memory limit. .It Bq Er ENOTDIR The .Fa name array specifies an intermediate rather than terminal name. .It Bq Er EISDIR The .Fa name array specifies a terminal name, but the actual name is not terminal. .It Bq Er ENOENT The .Fa name array specifies a value that is unknown. .It Bq Er EPERM An attempt is made to set a read-only value. .It Bq Er EPERM A process without appropriate privilege attempts to set a value. .El .Sh SEE ALSO .Xr confstr 3 , .Xr kvm 3 , .Xr sysconf 3 , .Xr sysctl 8 .Sh HISTORY The .Fn sysctl function first appeared in .Bx 4.4 . Index: stable/12/sys/kern/kern_mib.c =================================================================== --- stable/12/sys/kern/kern_mib.c (revision 345825) +++ stable/12/sys/kern/kern_mib.c (revision 345826) @@ -1,610 +1,614 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Mike Karels at Berkeley Software Design, Inc. * * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD * project, to make these variables more userfriendly. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94 */ #include __FBSDID("$FreeBSD$"); #include "opt_posix.h" #include "opt_config.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0, "Sysctl internal magic"); SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0, "High kernel, proc, limits &c"); SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0, "Virtual memory"); SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0, "File system"); SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0, "Network, (see socket.h)"); SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0, "Debugging"); SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, "Sizeof various things"); SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0, "hardware"); SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0, "machine dependent"); SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0, "user-level"); SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, "p1003_1b, (see p1003_1b.h)"); SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0, "Compatibility code"); SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0, "Security"); #ifdef REGRESSION SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0, "Regression test MIB"); #endif SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE, kern_ident, 0, "Kernel identifier"); SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD, SYSCTL_NULL_INT_PTR, BSD, "Operating system revision"); SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE, version, 0, "Kernel version"); SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE, compiler_version, 0, "Version of compiler used to compile kernel"); SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE| CTLFLAG_CAPRD, ostype, 0, "Operating system type"); SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, &maxproc, 0, "Maximum number of processes"); SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, &maxprocperuid, 0, "Maximum processes allowed per userid"); SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, &maxusers, 0, "Hint for kernel tuning"); SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD, SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)"); SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD, SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to"); SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN | CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0, "Maximum number of supplemental groups a user can belong to"); SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD, SYSCTL_NULL_INT_PTR, 1, "Whether job control is available"); #ifdef _POSIX_SAVED_IDS SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available"); #else SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available"); #endif char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE, kernelname, sizeof kernelname, "Name of kernel file booted"); SYSCTL_INT(_kern, KERN_MAXPHYS, maxphys, CTLFLAG_RD | CTLFLAG_CAPRD, SYSCTL_NULL_INT_PTR, MAXPHYS, "Maximum block I/O access size"); SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD, &mp_ncpus, 0, "Number of active CPUs"); SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD, SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order"); SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD, SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size"); static int sysctl_kern_arnd(SYSCTL_HANDLER_ARGS) { char buf[256]; size_t len; /*- * This is one of the very few legitimate uses of read_random(9). * Use of arc4random(9) is not recommended as that will ignore * an unsafe (i.e. unseeded) random(4). * * If random(4) is not seeded, then this returns 0, so the * sysctl will return a zero-length buffer. */ len = read_random(buf, MIN(req->oldlen, sizeof(buf))); return (SYSCTL_OUT(req, buf, len)); } SYSCTL_PROC(_kern, KERN_ARND, arandom, CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0, sysctl_kern_arnd, "", "arc4rand"); static int sysctl_hw_physmem(SYSCTL_HANDLER_ARGS) { u_long val, p; p = SIZE_T_MAX >> PAGE_SHIFT; if (physmem < p) p = physmem; val = ctob(p); return (sysctl_handle_long(oidp, &val, 0, req)); } SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD, - 0, 0, sysctl_hw_physmem, "LU", ""); + 0, 0, sysctl_hw_physmem, "LU", + "Amount of physical memory (in bytes)"); static int sysctl_hw_realmem(SYSCTL_HANDLER_ARGS) { u_long val, p; p = SIZE_T_MAX >> PAGE_SHIFT; if (realmem < p) p = realmem; val = ctob(p); return (sysctl_handle_long(oidp, &val, 0, req)); } SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD, - 0, 0, sysctl_hw_realmem, "LU", ""); + 0, 0, sysctl_hw_realmem, "LU", + "Amount of memory (in bytes) reported by the firmware"); static int sysctl_hw_usermem(SYSCTL_HANDLER_ARGS) { u_long val, p, p1; p1 = physmem - vm_wire_count(); p = SIZE_T_MAX >> PAGE_SHIFT; if (p1 < p) p = p1; val = ctob(p); return (sysctl_handle_long(oidp, &val, 0, req)); } SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD, - 0, 0, sysctl_hw_usermem, "LU", ""); + 0, 0, sysctl_hw_usermem, "LU", + "Amount of memory (in bytes) which is not wired"); -SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, ""); +SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, + "Amount of physical memory (in pages)"); u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE }; static int sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS) { int error; #ifdef SCTL_MASK32 int i; uint32_t pagesizes32[MAXPAGESIZES]; if (req->flags & SCTL_MASK32) { /* * Recreate the "pagesizes" array with 32-bit elements. Truncate * any page size greater than UINT32_MAX to zero. */ for (i = 0; i < MAXPAGESIZES; i++) pagesizes32[i] = (uint32_t)pagesizes[i]; error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32)); } else #endif error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes)); return (error); } SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD, NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes"); #ifdef SCTL_MASK32 int adaptive_machine_arch = 1; SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW, &adaptive_machine_arch, 1, "Adapt reported machine architecture to the ABI of the binary"); #endif static int sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS) { int error; static const char machine_arch[] = MACHINE_ARCH; #ifdef SCTL_MASK32 static const char machine_arch32[] = MACHINE_ARCH32; if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch) error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32)); else #endif error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch)); return (error); } SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A", "System architecture"); SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE, #ifdef COMPAT_FREEBSD32 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries"); #else MACHINE_ARCH, 0, "Supported architectures for binaries"); #endif static int sysctl_hostname(SYSCTL_HANDLER_ARGS) { struct prison *pr, *cpr; size_t pr_offset; char tmpname[MAXHOSTNAMELEN]; int descend, error, len; /* * This function can set: hostname domainname hostuuid. * Keep that in mind when comments say "hostname". */ pr_offset = (size_t)arg1; len = arg2; KASSERT(len <= sizeof(tmpname), ("length %d too long for %s", len, __func__)); pr = req->td->td_ucred->cr_prison; if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) return (EPERM); /* * Make a local copy of hostname to get/set so we don't have to hold * the jail mutex during the sysctl copyin/copyout activities. */ mtx_lock(&pr->pr_mtx); bcopy((char *)pr + pr_offset, tmpname, len); mtx_unlock(&pr->pr_mtx); error = sysctl_handle_string(oidp, tmpname, len, req); if (req->newptr != NULL && error == 0) { /* * Copy the locally set hostname to all jails that share * this host info. */ sx_slock(&allprison_lock); while (!(pr->pr_flags & PR_HOST)) pr = pr->pr_parent; mtx_lock(&pr->pr_mtx); bcopy(tmpname, (char *)pr + pr_offset, len); FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) if (cpr->pr_flags & PR_HOST) descend = 0; else bcopy(tmpname, (char *)cpr + pr_offset, len); mtx_unlock(&pr->pr_mtx); sx_sunlock(&allprison_lock); } return (error); } SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN, sysctl_hostname, "A", "Hostname"); SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN, sysctl_hostname, "A", "Name of the current YP/NIS domain"); SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN, sysctl_hostname, "A", "Host UUID"); static int regression_securelevel_nonmonotonic = 0; #ifdef REGRESSION SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); #endif static int sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) { struct prison *pr, *cpr; int descend, error, level; pr = req->td->td_ucred->cr_prison; /* * Reading the securelevel is easy, since the current jail's level * is known to be at least as secure as any higher levels. Perform * a lockless read since the securelevel is an integer. */ level = pr->pr_securelevel; error = sysctl_handle_int(oidp, &level, 0, req); if (error || !req->newptr) return (error); /* Permit update only if the new securelevel exceeds the old. */ sx_slock(&allprison_lock); mtx_lock(&pr->pr_mtx); if (!regression_securelevel_nonmonotonic && level < pr->pr_securelevel) { mtx_unlock(&pr->pr_mtx); sx_sunlock(&allprison_lock); return (EPERM); } pr->pr_securelevel = level; /* * Set all child jails to be at least this level, but do not lower * them (even if regression_securelevel_nonmonotonic). */ FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) { if (cpr->pr_securelevel < level) cpr->pr_securelevel = level; } mtx_unlock(&pr->pr_mtx); sx_sunlock(&allprison_lock); return (error); } SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, "I", "Current secure level"); #ifdef INCLUDE_CONFIG_FILE /* Actual kernel configuration options. */ extern char kernconfstring[]; SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE, kernconfstring, 0, "Kernel configuration file"); #endif static int sysctl_hostid(SYSCTL_HANDLER_ARGS) { struct prison *pr, *cpr; u_long tmpid; int descend, error; /* * Like sysctl_hostname, except it operates on a u_long * instead of a string, and is used only for hostid. */ pr = req->td->td_ucred->cr_prison; if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) return (EPERM); tmpid = pr->pr_hostid; error = sysctl_handle_long(oidp, &tmpid, 0, req); if (req->newptr != NULL && error == 0) { sx_slock(&allprison_lock); while (!(pr->pr_flags & PR_HOST)) pr = pr->pr_parent; mtx_lock(&pr->pr_mtx); pr->pr_hostid = tmpid; FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) if (cpr->pr_flags & PR_HOST) descend = 0; else cpr->pr_hostid = tmpid; mtx_unlock(&pr->pr_mtx); sx_sunlock(&allprison_lock); } return (error); } SYSCTL_PROC(_kern, KERN_HOSTID, hostid, CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0, sysctl_hostid, "LU", "Host ID"); /* * The osrelease string is copied from the global (osrelease in vers.c) into * prison0 by a sysinit and is inherited by child jails if not changed at jail * creation, so we always return the copy from the current prison data. */ static int sysctl_osrelease(SYSCTL_HANDLER_ARGS) { struct prison *pr; pr = req->td->td_ucred->cr_prison; return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1)); } SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease, CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, sysctl_osrelease, "A", "Operating system release"); /* * The osreldate number is copied from the global (osreldate in vers.c) into * prison0 by a sysinit and is inherited by child jails if not changed at jail * creation, so we always return the value from the current prison data. */ static int sysctl_osreldate(SYSCTL_HANDLER_ARGS) { struct prison *pr; pr = req->td->td_ucred->cr_prison; return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate))); } /* * NOTICE: The *userland* release date is available in * /usr/include/osreldate.h */ SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate, CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, sysctl_osreldate, "I", "Kernel release date"); SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features"); #ifdef COMPAT_FREEBSD4 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4"); #endif #ifdef COMPAT_FREEBSD5 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5"); #endif #ifdef COMPAT_FREEBSD6 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6"); #endif #ifdef COMPAT_FREEBSD7 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7"); #endif /* * This is really cheating. These actually live in the libc, something * which I'm not quite sure is a good idea anyway, but in order for * getnext and friends to actually work, we define dummies here. * * XXXRW: These probably should be CTLFLAG_CAPRD. */ SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, "", 0, "PATH that finds all the standard utilities"); SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)"); SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)"); SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)"); SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)"); SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, ""); SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line"); SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted"); SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "The version of POSIX 1003.2 with which the system attempts to comply"); SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option"); SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option"); SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, ""); SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities"); SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities"); SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales"); SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities"); SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities"); SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time"); SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names"); #include SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)"); SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)"); static int sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS) { int error, pm; pm = pid_max; error = sysctl_handle_int(oidp, &pm, 0, req); if (error || !req->newptr) return (error); sx_xlock(&proctree_lock); sx_xlock(&allproc_lock); /* * Only permit the values less then PID_MAX. * As a safety measure, do not allow to limit the pid_max too much. */ if (pm < 300 || pm > PID_MAX) error = EINVAL; else pid_max = pm; sx_xunlock(&allproc_lock); sx_xunlock(&proctree_lock); return (error); } SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE, 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid"); #include #include SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)"); SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)"); #include SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); /* Used by kernel debuggers. */ const int pcb_size = sizeof(struct pcb); SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)"); /* XXX compatibility, remove for 6.0 */ #include #include SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)), "compatibility for kern.fallback_elf_brand"); Index: stable/12 =================================================================== --- stable/12 (revision 345825) +++ stable/12 (revision 345826) Property changes on: stable/12 ___________________________________________________________________ Modified: svn:mergeinfo ## -0,0 +0,1 ## Merged /head:r345457