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Index: Makefile
===================================================================
--- Makefile
+++ Makefile
@@ -1,590 +1,8 @@
-#
# $FreeBSD$
-#
-# The user-driven targets are:
-#
-# universe - *Really* build *everything* (buildworld and
-# all kernels on all architectures).
-# tinderbox - Same as universe, but presents a list of failed build
-# targets and exits with an error if there were any.
-# buildworld - Rebuild *everything*, including glue to help do
-# upgrades.
-# installworld - Install everything built by "buildworld".
-# world - buildworld + installworld, no kernel.
-# buildkernel - Rebuild the kernel and the kernel-modules.
-# installkernel - Install the kernel and the kernel-modules.
-# installkernel.debug
-# reinstallkernel - Reinstall the kernel and the kernel-modules.
-# reinstallkernel.debug
-# kernel - buildkernel + installkernel.
-# kernel-toolchain - Builds the subset of world necessary to build a kernel
-# kernel-toolchains - Build kernel-toolchain for all universe targets.
-# doxygen - Build API documentation of the kernel, needs doxygen.
-# update - Convenient way to update your source tree(s).
-# checkworld - Run test suite on installed world.
-# check-old - List obsolete directories/files/libraries.
-# check-old-dirs - List obsolete directories.
-# check-old-files - List obsolete files.
-# check-old-libs - List obsolete libraries.
-# delete-old - Delete obsolete directories/files.
-# delete-old-dirs - Delete obsolete directories.
-# delete-old-files - Delete obsolete files.
-# delete-old-libs - Delete obsolete libraries.
-# targets - Print a list of supported TARGET/TARGET_ARCH pairs
-# for world and kernel targets.
-# toolchains - Build a toolchain for all world and kernel targets.
-# xdev - xdev-build + xdev-install for the architecture
-# specified with XDEV and XDEV_ARCH.
-# xdev-build - Build cross-development tools.
-# xdev-install - Install cross-development tools.
-# xdev-links - Create traditional links in /usr/bin for cc, etc
-# native-xtools - Create host binaries that produce target objects
-# for use in qemu user-mode jails.
-#
-# "quick" way to test all kernel builds:
-# _jflag=`sysctl -n hw.ncpu`
-# _jflag=$(($_jflag * 2))
-# [ $_jflag -gt 12 ] && _jflag=12
-# make universe -DMAKE_JUST_KERNELS JFLAG=-j${_jflag}
-#
-# This makefile is simple by design. The FreeBSD make automatically reads
-# the /usr/share/mk/sys.mk unless the -m argument is specified on the
-# command line. By keeping this makefile simple, it doesn't matter too
-# much how different the installed mk files are from those in the source
-# tree. This makefile executes a child make process, forcing it to use
-# the mk files from the source tree which are supposed to DTRT.
-#
-# Most of the user-driven targets (as listed above) are implemented in
-# Makefile.inc1. The exceptions are universe, tinderbox and targets.
-#
-# If you want to build your system from source be sure that /usr/obj has
-# at least 6GB of diskspace available. A complete 'universe' build requires
-# about 100GB of space.
-#
-# For individuals wanting to build from the sources currently on their
-# system, the simple instructions are:
-#
-# 1. `cd /usr/src' (or to the directory containing your source tree).
-# 2. Define `HISTORICAL_MAKE_WORLD' variable (see README).
-# 3. `make world'
-#
-# For individuals wanting to upgrade their sources (even if only a
-# delta of a few days):
-#
-# 1. `cd /usr/src' (or to the directory containing your source tree).
-# 2. `make buildworld'
-# 3. `make buildkernel KERNCONF=YOUR_KERNEL_HERE' (default is GENERIC).
-# 4. `make installkernel KERNCONF=YOUR_KERNEL_HERE' (default is GENERIC).
-# [steps 3. & 4. can be combined by using the "kernel" target]
-# 5. `reboot' (in single user mode: boot -s from the loader prompt).
-# 6. `mergemaster -p'
-# 7. `make installworld'
-# 8. `mergemaster' (you may wish to use -i, along with -U or -F).
-# 9. `make delete-old'
-# 10. `reboot'
-# 11. `make delete-old-libs' (in case no 3rd party program uses them anymore)
-#
-# See src/UPDATING `COMMON ITEMS' for more complete information.
-#
-# If TARGET=machine (e.g. powerpc, sparc64, ...) is specified you can
-# cross build world for other machine types using the buildworld target,
-# and once the world is built you can cross build a kernel using the
-# buildkernel target.
-#
-# Define the user-driven targets. These are listed here in alphabetical
-# order, but that's not important.
-#
-# Targets that begin with underscore are internal targets intended for
-# developer convenience only. They are intentionally not documented and
-# completely subject to change without notice.
-#
-# For more information, see the build(7) manual page.
-#
-# This is included so CC is set to ccache for -V, and COMPILER_TYPE/VERSION
-# can be cached for sub-makes.
-.if ${MAKE_VERSION} >= 20140620 && defined(.PARSEDIR)
-.include <bsd.compiler.mk>
-.endif
+PROG= prometheus_sysctl_exporter
+MAN= prometheus_sysctl_exporter.8
-# Note: we use this awkward construct to be compatible with FreeBSD's
-# old make used in 10.0 and 9.2 and earlier.
-.if defined(MK_DIRDEPS_BUILD) && ${MK_DIRDEPS_BUILD} == "yes" && \
- !make(showconfig) && !make(print-dir)
-# targets/Makefile plays the role of top-level
-.include "targets/Makefile"
-.else
+LIBADD= m
-TGTS= all all-man buildenv buildenvvars buildkernel buildworld \
- check check-old check-old-dirs check-old-files check-old-libs \
- checkdpadd checkworld clean cleandepend cleandir cleanworld \
- delete-old delete-old-dirs delete-old-files delete-old-libs \
- depend distribute distributekernel distributekernel.debug \
- distributeworld distrib-dirs distribution doxygen \
- everything hier hierarchy install installcheck installkernel \
- installkernel.debug packagekernel packageworld \
- reinstallkernel reinstallkernel.debug \
- installworld kernel-toolchain libraries lint maninstall \
- obj objlink rerelease showconfig tags toolchain update \
- _worldtmp _legacy _bootstrap-tools _cleanobj _obj \
- _build-tools _cross-tools _includes _libraries \
- build32 distribute32 install32 buildsoft distributesoft installsoft \
- builddtb xdev xdev-build xdev-install \
- xdev-links native-xtools stageworld stagekernel stage-packages \
- create-world-packages create-kernel-packages create-packages \
- packages installconfig real-packages sign-packages package-pkg \
- print-dir test-system-compiler
-
-# XXX: r156740: This can't work since bsd.subdir.mk is not included ever.
-# It will only work for SUBDIR_TARGETS in make.conf.
-TGTS+= ${SUBDIR_TARGETS}
-
-BITGTS= files includes
-BITGTS:=${BITGTS} ${BITGTS:S/^/build/} ${BITGTS:S/^/install/}
-TGTS+= ${BITGTS}
-
-# Only some targets are allowed to use meta mode. Others get it
-# disabled. In some cases, such as 'install', meta mode can be dangerous
-# as a cookie may be used to prevent redundant installations (such as
-# for WORLDTMP staging). For DESTDIR=/ we always want to install though.
-# For other cases, such as delete-old-libs, meta mode may break
-# the interactive tty prompt. The safest route is to just whitelist
-# the ones that benefit from it.
-META_TGT_WHITELIST+= \
- _* build32 buildfiles buildincludes buildkernel buildsoft \
- buildworld everything kernel-toolchain kernel-toolchains kernel \
- kernels libraries native-xtools showconfig test-system-compiler \
- tinderbox toolchain \
- toolchains universe world worlds xdev xdev-build
-
-.ORDER: buildworld installworld
-.ORDER: buildworld distributeworld
-.ORDER: buildworld buildkernel
-.ORDER: installworld distribution
-.ORDER: installworld installkernel
-.ORDER: buildkernel installkernel
-.ORDER: buildkernel installkernel.debug
-.ORDER: buildkernel reinstallkernel
-.ORDER: buildkernel reinstallkernel.debug
-
-PATH= /sbin:/bin:/usr/sbin:/usr/bin
-MAKEOBJDIRPREFIX?= /usr/obj
-_MAKEOBJDIRPREFIX!= /usr/bin/env -i PATH=${PATH} MK_AUTO_OBJ=no ${MAKE} \
- ${.MAKEFLAGS:MMAKEOBJDIRPREFIX=*} __MAKE_CONF=${__MAKE_CONF} \
- -f /dev/null -V MAKEOBJDIRPREFIX dummy
-.if !empty(_MAKEOBJDIRPREFIX)
-.error MAKEOBJDIRPREFIX can only be set in environment, not as a global\
- (in make.conf(5)) or command-line variable.
-.endif
-
-# We often need to use the tree's version of make to build it.
-# Choices add to complexity though.
-# We cannot blindly use a make which may not be the one we want
-# so be exlicit - until all choice is removed.
-WANT_MAKE= bmake
-.if !empty(.MAKE.MODE:Mmeta)
-# 20160604 - support missing-meta,missing-filemon and performance improvements
-WANT_MAKE_VERSION= 20160604
-.else
-# 20160220 - support .dinclude for FAST_DEPEND.
-WANT_MAKE_VERSION= 20160220
-.endif
-MYMAKE= ${MAKEOBJDIRPREFIX}${.CURDIR}/make.${MACHINE}/${WANT_MAKE}
-.if defined(.PARSEDIR)
-HAVE_MAKE= bmake
-.else
-HAVE_MAKE= fmake
-.endif
-.if ${HAVE_MAKE} != ${WANT_MAKE} || \
- (defined(WANT_MAKE_VERSION) && ${MAKE_VERSION} < ${WANT_MAKE_VERSION})
-NEED_MAKE_UPGRADE= t
-.endif
-.if exists(${MYMAKE})
-SUB_MAKE:= ${MYMAKE} -m ${.CURDIR}/share/mk
-.elif defined(NEED_MAKE_UPGRADE)
-# It may not exist yet but we may cause it to.
-# In the case of fmake, upgrade_checks may cause a newer version to be built.
-SUB_MAKE= `test -x ${MYMAKE} && echo ${MYMAKE} || echo ${MAKE}` \
- -m ${.CURDIR}/share/mk
-.else
-SUB_MAKE= ${MAKE} -m ${.CURDIR}/share/mk
-.endif
-
-_MAKE= PATH=${PATH} MAKE_CMD=${MAKE} ${SUB_MAKE} -f Makefile.inc1 \
- TARGET=${_TARGET} TARGET_ARCH=${_TARGET_ARCH}
-
-# Only allow meta mode for the whitelisted targets. See META_TGT_WHITELIST
-# above.
-.for _tgt in ${META_TGT_WHITELIST}
-.if make(${_tgt})
-_CAN_USE_META_MODE?= yes
-.endif
-.endfor
-.if !defined(_CAN_USE_META_MODE)
-_MAKE+= MK_META_MODE=no
-.if defined(.PARSEDIR)
-.unexport META_MODE
-.endif
-.elif defined(MK_META_MODE) && ${MK_META_MODE} == "yes"
-.if !exists(/dev/filemon) && !defined(NO_FILEMON) && !make(showconfig)
-# Require filemon be loaded to provide a working incremental build
-.error ${.newline}ERROR: The filemon module (/dev/filemon) is not loaded. \
- ${.newline}ERROR: WITH_META_MODE is enabled but requires filemon for an incremental build. \
- ${.newline}ERROR: 'kldload filemon' or pass -DNO_FILEMON to suppress this error.
-.endif # !exists(/dev/filemon) && !defined(NO_FILEMON)
-.endif # !defined(_CAN_USE_META_MODE)
-
-# Guess machine architecture from machine type, and vice versa.
-.if !defined(TARGET_ARCH) && defined(TARGET)
-_TARGET_ARCH= ${TARGET:S/pc98/i386/:S/arm64/aarch64/}
-.elif !defined(TARGET) && defined(TARGET_ARCH) && \
- ${TARGET_ARCH} != ${MACHINE_ARCH}
-_TARGET= ${TARGET_ARCH:C/mips(n32|64)?(el)?(hf)?/mips/:C/arm(v6)?(eb)?/arm/:C/aarch64/arm64/:C/powerpc64/powerpc/:C/powerpcspe/powerpc/:C/riscv64(sf)?/riscv/}
-.endif
-.if defined(TARGET) && !defined(_TARGET)
-_TARGET=${TARGET}
-.endif
-.if defined(TARGET_ARCH) && !defined(_TARGET_ARCH)
-_TARGET_ARCH=${TARGET_ARCH}
-.endif
-# for historical compatibility for xdev targets
-.if defined(XDEV)
-_TARGET= ${XDEV}
-.endif
-.if defined(XDEV_ARCH)
-_TARGET_ARCH= ${XDEV_ARCH}
-.endif
-# Otherwise, default to current machine type and architecture.
-_TARGET?= ${MACHINE}
-_TARGET_ARCH?= ${MACHINE_ARCH}
-
-.if make(print-dir)
-.SILENT:
-.endif
-
-#
-# Make sure we have an up-to-date make(1). Only world and buildworld
-# should do this as those are the initial targets used for upgrades.
-# The user can define ALWAYS_CHECK_MAKE to have this check performed
-# for all targets.
-#
-.if defined(ALWAYS_CHECK_MAKE) || !defined(.PARSEDIR)
-${TGTS}: upgrade_checks
-.else
-buildworld: upgrade_checks
-.endif
-
-#
-# Handle the user-driven targets, using the source relative mk files.
-#
-
-tinderbox toolchains kernel-toolchains: .MAKE
-${TGTS}: .PHONY .MAKE
- ${_+_}@cd ${.CURDIR}; ${_MAKE} ${.TARGET}
-
-# The historic default "all" target creates files which may cause stale
-# or (in the cross build case) unlinkable results. Fail with an error
-# when no target is given. The users can explicitly specify "all"
-# if they want the historic behavior.
-.MAIN: _guard
-
-_guard: .PHONY
- @echo
- @echo "Explicit target required. Likely \"${SUBDIR_OVERRIDE:Dall:Ubuildworld}\" is wanted. See build(7)."
- @echo
- @false
-
-STARTTIME!= LC_ALL=C date
-CHECK_TIME!= find ${.CURDIR}/sys/sys/param.h -mtime -0s ; echo
-.if !empty(CHECK_TIME)
-.error check your date/time: ${STARTTIME}
-.endif
-
-.if defined(HISTORICAL_MAKE_WORLD) || defined(DESTDIR)
-#
-# world
-#
-# Attempt to rebuild and reinstall everything. This target is not to be
-# used for upgrading an existing FreeBSD system, because the kernel is
-# not included. One can argue that this target doesn't build everything
-# then.
-#
-world: upgrade_checks .PHONY
- @echo "--------------------------------------------------------------"
- @echo ">>> make world started on ${STARTTIME}"
- @echo "--------------------------------------------------------------"
-.if target(pre-world)
- @echo
- @echo "--------------------------------------------------------------"
- @echo ">>> Making 'pre-world' target"
- @echo "--------------------------------------------------------------"
- ${_+_}@cd ${.CURDIR}; ${_MAKE} pre-world
-.endif
- ${_+_}@cd ${.CURDIR}; ${_MAKE} buildworld
- ${_+_}@cd ${.CURDIR}; ${_MAKE} installworld MK_META_MODE=no
-.if target(post-world)
- @echo
- @echo "--------------------------------------------------------------"
- @echo ">>> Making 'post-world' target"
- @echo "--------------------------------------------------------------"
- ${_+_}@cd ${.CURDIR}; ${_MAKE} post-world
-.endif
- @echo
- @echo "--------------------------------------------------------------"
- @echo ">>> make world completed on `LC_ALL=C date`"
- @echo " (started ${STARTTIME})"
- @echo "--------------------------------------------------------------"
-.else
-world: .PHONY
- @echo "WARNING: make world will overwrite your existing FreeBSD"
- @echo "installation without also building and installing a new"
- @echo "kernel. This can be dangerous. Please read the handbook,"
- @echo "'Rebuilding world', for how to upgrade your system."
- @echo "Define DESTDIR to where you want to install FreeBSD,"
- @echo "including /, to override this warning and proceed as usual."
- @echo ""
- @echo "Bailing out now..."
- @false
-.endif
-
-#
-# kernel
-#
-# Short hand for `make buildkernel installkernel'
-#
-kernel: buildkernel installkernel .PHONY
-
-#
-# Perform a few tests to determine if the installed tools are adequate
-# for building the world.
-#
-upgrade_checks: .PHONY
-.if defined(NEED_MAKE_UPGRADE)
- @${_+_}(cd ${.CURDIR} && ${MAKE} ${WANT_MAKE:S,^f,,})
-.endif
-
-#
-# Upgrade make(1) to the current version using the installed
-# headers, libraries and tools. Also, allow the location of
-# the system bsdmake-like utility to be overridden.
-#
-MMAKEENV= MAKEOBJDIRPREFIX=${MYMAKE:H} \
- DESTDIR= \
- INSTALL="sh ${.CURDIR}/tools/install.sh"
-MMAKE= ${MMAKEENV} ${MAKE} \
- MAN= -DNO_SHARED \
- -DNO_CPU_CFLAGS -DNO_WERROR \
- -DNO_SUBDIR \
- DESTDIR= PROGNAME=${MYMAKE:T}
-
-bmake: .PHONY
- @echo
- @echo "--------------------------------------------------------------"
- @echo ">>> Building an up-to-date ${.TARGET}(1)"
- @echo "--------------------------------------------------------------"
- ${_+_}@cd ${.CURDIR}/usr.bin/${.TARGET}; \
- ${MMAKE} obj; \
- ${MMAKE} depend; \
- ${MMAKE} all; \
- ${MMAKE} install DESTDIR=${MYMAKE:H} BINDIR=
-
-regress: .PHONY
- @echo "'make regress' has been renamed 'make check'" | /usr/bin/fmt
- @false
-
-tinderbox toolchains kernel-toolchains kernels worlds: upgrade_checks
-
-tinderbox: .PHONY
- @cd ${.CURDIR}; ${SUB_MAKE} DOING_TINDERBOX=YES universe
-
-toolchains: .PHONY
- @cd ${.CURDIR}; ${SUB_MAKE} UNIVERSE_TARGET=toolchain universe
-
-kernel-toolchains: .PHONY
- @cd ${.CURDIR}; ${SUB_MAKE} UNIVERSE_TARGET=kernel-toolchain universe
-
-kernels: .PHONY
- @cd ${.CURDIR}; ${SUB_MAKE} UNIVERSE_TARGET=buildkernel universe
-
-worlds: .PHONY
- @cd ${.CURDIR}; ${SUB_MAKE} UNIVERSE_TARGET=buildworld universe
-
-#
-# universe
-#
-# Attempt to rebuild *everything* for all supported architectures,
-# with a reasonable chance of success, regardless of how old your
-# existing system is.
-#
-.if make(universe) || make(universe_kernels) || make(tinderbox) || make(targets)
-TARGETS?=amd64 arm arm64 i386 mips pc98 powerpc sparc64
-_UNIVERSE_TARGETS= ${TARGETS}
-TARGET_ARCHES_arm?= arm armeb armv6
-TARGET_ARCHES_arm64?= aarch64
-TARGET_ARCHES_mips?= mipsel mips mips64el mips64 mipsn32 mipselhf mipshf mips64elhf mips64hf
-TARGET_ARCHES_powerpc?= powerpc powerpc64 powerpcspe
-TARGET_ARCHES_pc98?= i386
-.for target in ${TARGETS}
-TARGET_ARCHES_${target}?= ${target}
-.endfor
-
-# XXX Remove arm64 from universe if the required binutils package is missing.
-# It does not build with the in-tree linker.
-.if !exists(/usr/local/aarch64-freebsd/bin/ld) && ${TARGETS:Marm64}
-_UNIVERSE_TARGETS:= ${_UNIVERSE_TARGETS:Narm64}
-universe: universe_arm64_skip .PHONY
-universe_epilogue: universe_arm64_skip .PHONY
-universe_arm64_skip: universe_prologue .PHONY
- @echo ">> arm64 skipped - install aarch64-binutils port or package to build"
-.endif
-
-.if defined(UNIVERSE_TARGET)
-MAKE_JUST_WORLDS= YES
-.else
-UNIVERSE_TARGET?= buildworld
-.endif
-KERNSRCDIR?= ${.CURDIR}/sys
-
-targets: .PHONY
- @echo "Supported TARGET/TARGET_ARCH pairs for world and kernel targets"
-.for target in ${TARGETS}
-.for target_arch in ${TARGET_ARCHES_${target}}
- @echo " ${target}/${target_arch}"
-.endfor
-.endfor
-
-.if defined(DOING_TINDERBOX)
-FAILFILE=${.CURDIR}/_.tinderbox.failed
-MAKEFAIL=tee -a ${FAILFILE}
-.else
-MAKEFAIL=cat
-.endif
-
-universe_prologue: upgrade_checks
-universe: universe_prologue
-universe_prologue: .PHONY
- @echo "--------------------------------------------------------------"
- @echo ">>> make universe started on ${STARTTIME}"
- @echo "--------------------------------------------------------------"
-.if defined(DOING_TINDERBOX)
- @rm -f ${FAILFILE}
-.endif
-.for target in ${_UNIVERSE_TARGETS}
-universe: universe_${target}
-universe_epilogue: universe_${target}
-universe_${target}: universe_${target}_prologue .PHONY
-universe_${target}_prologue: universe_prologue .PHONY
- @echo ">> ${target} started on `LC_ALL=C date`"
-universe_${target}_worlds: .PHONY
-
-.if !defined(MAKE_JUST_KERNELS)
-universe_${target}_done: universe_${target}_worlds .PHONY
-.for target_arch in ${TARGET_ARCHES_${target}}
-universe_${target}_worlds: universe_${target}_${target_arch} .PHONY
-universe_${target}_${target_arch}: universe_${target}_prologue .MAKE .PHONY
- @echo ">> ${target}.${target_arch} ${UNIVERSE_TARGET} started on `LC_ALL=C date`"
- @(cd ${.CURDIR} && env __MAKE_CONF=/dev/null \
- ${SUB_MAKE} ${JFLAG} ${UNIVERSE_TARGET} \
- TARGET=${target} \
- TARGET_ARCH=${target_arch} \
- > _.${target}.${target_arch}.${UNIVERSE_TARGET} 2>&1 || \
- (echo "${target}.${target_arch} ${UNIVERSE_TARGET} failed," \
- "check _.${target}.${target_arch}.${UNIVERSE_TARGET} for details" | \
- ${MAKEFAIL}))
- @echo ">> ${target}.${target_arch} ${UNIVERSE_TARGET} completed on `LC_ALL=C date`"
-.endfor
-.endif # !MAKE_JUST_KERNELS
-
-.if !defined(MAKE_JUST_WORLDS)
-universe_${target}_done: universe_${target}_kernels .PHONY
-universe_${target}_kernels: universe_${target}_worlds .PHONY
-universe_${target}_kernels: universe_${target}_prologue .MAKE .PHONY
-.if exists(${KERNSRCDIR}/${target}/conf/NOTES)
- @(cd ${KERNSRCDIR}/${target}/conf && env __MAKE_CONF=/dev/null \
- ${SUB_MAKE} LINT > ${.CURDIR}/_.${target}.makeLINT 2>&1 || \
- (echo "${target} 'make LINT' failed," \
- "check _.${target}.makeLINT for details"| ${MAKEFAIL}))
-.endif
- @cd ${.CURDIR}; ${SUB_MAKE} ${.MAKEFLAGS} TARGET=${target} \
- universe_kernels
-.endif # !MAKE_JUST_WORLDS
-
-# Tell the user the worlds and kernels have completed
-universe_${target}: universe_${target}_done
-universe_${target}_done:
- @echo ">> ${target} completed on `LC_ALL=C date`"
-.endfor
-universe_kernels: universe_kernconfs .PHONY
-.if !defined(TARGET)
-TARGET!= uname -m
-.endif
-.if defined(MAKE_ALL_KERNELS)
-_THINNER=cat
-.else
-_THINNER=xargs grep -L "^.NO_UNIVERSE" || true
-.endif
-KERNCONFS!= cd ${KERNSRCDIR}/${TARGET}/conf && \
- find [[:upper:][:digit:]]*[[:upper:][:digit:]] \
- -type f -maxdepth 0 \
- ! -name DEFAULTS ! -name NOTES | \
- ${_THINNER}
-universe_kernconfs: .PHONY
-.for kernel in ${KERNCONFS}
-TARGET_ARCH_${kernel}!= cd ${KERNSRCDIR}/${TARGET}/conf && \
- config -m ${KERNSRCDIR}/${TARGET}/conf/${kernel} 2> /dev/null | \
- grep -v WARNING: | cut -f 2
-.if empty(TARGET_ARCH_${kernel})
-.error "Target architecture for ${TARGET}/conf/${kernel} unknown. config(8) likely too old."
-.endif
-universe_kernconfs: universe_kernconf_${TARGET}_${kernel}
-universe_kernconf_${TARGET}_${kernel}: .MAKE
- @(cd ${.CURDIR} && env __MAKE_CONF=/dev/null \
- ${SUB_MAKE} ${JFLAG} buildkernel \
- TARGET=${TARGET} \
- TARGET_ARCH=${TARGET_ARCH_${kernel}} \
- KERNCONF=${kernel} \
- > _.${TARGET}.${kernel} 2>&1 || \
- (echo "${TARGET} ${kernel} kernel failed," \
- "check _.${TARGET}.${kernel} for details"| ${MAKEFAIL}))
-.endfor
-universe: universe_epilogue
-universe_epilogue: .PHONY
- @echo "--------------------------------------------------------------"
- @echo ">>> make universe completed on `LC_ALL=C date`"
- @echo " (started ${STARTTIME})"
- @echo "--------------------------------------------------------------"
-.if defined(DOING_TINDERBOX)
- @if [ -e ${FAILFILE} ] ; then \
- echo "Tinderbox failed:" ;\
- cat ${FAILFILE} ;\
- exit 1 ;\
- fi
-.endif
-.endif
-
-buildLINT: .PHONY
- ${MAKE} -C ${.CURDIR}/sys/${_TARGET}/conf LINT
-
-.if defined(.PARSEDIR)
-# This makefile does not run in meta mode
-.MAKE.MODE= normal
-# Normally the things we run from here don't either.
-# Using -DWITH_META_MODE
-# we can buildworld with meta files created which are useful
-# for debugging, but without any of the rest of a meta mode build.
-MK_DIRDEPS_BUILD= no
-MK_STAGING= no
-# tell meta.autodep.mk to not even think about updating anything.
-UPDATE_DEPENDFILE= NO
-.if !make(showconfig)
-.export MK_DIRDEPS_BUILD MK_STAGING UPDATE_DEPENDFILE
-.endif
-
-.if make(universe)
-# we do not want a failure of one branch abort all.
-MAKE_JOB_ERROR_TOKEN= no
-.export MAKE_JOB_ERROR_TOKEN
-.endif
-.endif # bmake
-
-.endif # DIRDEPS_BUILD
+.include <bsd.prog.mk>
Index: etc/inetd.conf
===================================================================
--- etc/inetd.conf
+++ etc/inetd.conf
@@ -117,3 +117,7 @@
#netbios-ssn stream tcp nowait root /usr/local/sbin/smbd smbd
#netbios-ns dgram udp wait root /usr/local/sbin/nmbd nmbd
#swat stream tcp nowait/400 root /usr/local/sbin/swat swat
+#
+# Example entry for the Prometheus sysctl metrics exporter
+#
+#prom-sysctl stream tcp nowait nobody /usr/sbin/prometheus_sysctl_exporter prometheus_sysctl_exporter -dh
Index: etc/services
===================================================================
--- etc/services
+++ etc/services
@@ -2450,6 +2450,7 @@
aurora 9084/tcp #IBM AURORA Performance Visualizer
aurora 9084/udp #IBM AURORA Performance Visualizer
jetdirect 9100/tcp #HP JetDirect card
+prom-sysctl 9124/tcp #prometheus_sysctl_exporter(8)
git 9418/tcp #git pack transfer service
git 9418/udp #git pack transfer service
man 9535/tcp
Index: sbin/sysctl/Makefile
===================================================================
--- sbin/sysctl/Makefile
+++ sbin/sysctl/Makefile
@@ -1,9 +1,8 @@
-# @(#)Makefile 8.1 (Berkeley) 6/6/93
# $FreeBSD$
-PACKAGE=runtime
-PROG= sysctl
-WARNS?= 3
-MAN= sysctl.8
+PROG= prometheus_sysctl_exporter
+MAN= prometheus_sysctl_exporter.8
+
+LIBADD= m
.include <bsd.prog.mk>
Index: sbin/sysctl/sysctl.8
===================================================================
--- sbin/sysctl/sysctl.8
+++ sbin/sysctl/sysctl.8
@@ -28,7 +28,7 @@
.\" From: @(#)sysctl.8 8.1 (Berkeley) 6/6/93
.\" $FreeBSD$
.\"
-.Dd December 10, 2015
+.Dd December 14, 2016
.Dt SYSCTL 8
.Os
.Sh NAME
@@ -306,7 +306,8 @@
.Xr sysctl 3 ,
.Xr loader.conf 5 ,
.Xr sysctl.conf 5 ,
-.Xr loader 8
+.Xr loader 8 ,
+.Xr prometheus_sysctl_exporter 8
.Sh HISTORY
A
.Nm
Index: usr.sbin/Makefile
===================================================================
--- usr.sbin/Makefile
+++ usr.sbin/Makefile
@@ -62,6 +62,7 @@
periodic \
powerd \
procctl \
+ prometheus_sysctl_exporter \
pstat \
pw \
pwd_mkdb \
Index: usr.sbin/prometheus_sysctl_exporter/Makefile
===================================================================
--- /dev/null
+++ usr.sbin/prometheus_sysctl_exporter/Makefile
@@ -0,0 +1,8 @@
+# $FreeBSD$
+
+PROG= prometheus_sysctl_exporter
+MAN= prometheus_sysctl_exporter.8
+
+LIBADD= m
+
+.include <bsd.prog.mk>
Index: usr.sbin/prometheus_sysctl_exporter/prometheus_sysctl_exporter.8
===================================================================
--- /dev/null
+++ usr.sbin/prometheus_sysctl_exporter/prometheus_sysctl_exporter.8
@@ -0,0 +1,104 @@
+.\" Copyright (c) 2016 Nuxi, https://nuxi.nl/
+.\"
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD$
+.Dd December 14, 2016
+.Dt PROMETHEUS_SYSCTL_EXPORTER 8
+.Os
+.Sh NAME
+.Nm prometheus_sysctl_exporter
+.Nd print kernel state as Prometheus metrics
+.Sh SYNOPSIS
+.Nm prometheus_sysctl_exporter
+.Op Fl dh
+.Op Ar prefix ...
+.Sh DESCRIPTION
+Prometheus is a monitoring system that gathers metrics from its targets
+by fetching them through HTTP GET requests.
+Metrics are identified by a name and an optional set of labels.
+Sample values are required to be numerical.
+.Pp
+The
+.Nm
+utility prints the values of sysctl nodes to standard output,
+formatted such that they can be scraped by Prometheus directly.
+By default,
+it prints metrics for all numerically representable nodes in the sysctl
+namespace.
+It is also possible to limit output to a smaller number of metrics by
+specifying one or more prefixes as arguments.
+.Pp
+Metrics printed by this utility are named
+.Ql sysctl_ ,
+followed by the name of the sysctl node having its
+.Ql .\&
+separators replaced by
+.Ql _ .
+Components on which it is desirable to aggregate (e.g.,
+names of devices) are omitted from the metric's name,
+but are appended as labels instead.
+.Pp
+There are two different methods for exporting the output of
+.Nm
+to Prometheus.
+The first method is to periodically invoke this utility through
+.Xr cron 8
+and store its output in a textfile.
+The metrics in this textfile can then be served over HTTP using the
+Prometheus node exporter's textfile collector.
+The second method is to run this utility through
+.Xr inetd 8 .
+TCP port 9124 has been allocated for this purpose.
+.Pp
+The following options are available:
+.Bl -tag -width indent
+.It Fl d
+Print descriptions of metrics when available.
+.It Fl h
+Precede the output with a HTTP response header.
+This flag is required when running this utility through
+.Xr inetd 8 .
+.El
+.Sh SEE ALSO
+.Xr cron 8 ,
+.Xr inetd 8 ,
+.Xr sysctl 8 ,
+.Xr SYSCTL_ADD_NODE_WITH_LABEL 9
+.Pp
+Prometheus project:
+.Pa https://prometheus.io/ .
+.Pp
+Prometheus exposition formats:
+.Pa https://prometheus.io/docs/instrumenting/exposition_formats/ .
+.Pp
+Prometheus node exporter:
+.Pa https://github.com/prometheus/node_exporter .
+.Pp
+Prometheus default port allocations:
+.Pa https://github.com/prometheus/prometheus/wiki/Default-port-allocations .
+.Sh HISTORY
+.Nm
+first appeared in
+.Fx 12.0 .
+.Sh AUTHORS
+.An Nuxi : Pa https://nuxi.nl/ .
Index: usr.sbin/prometheus_sysctl_exporter/prometheus_sysctl_exporter.c
===================================================================
--- /dev/null
+++ usr.sbin/prometheus_sysctl_exporter/prometheus_sysctl_exporter.c
@@ -0,0 +1,588 @@
+/*-
+ * Copyright (c) 2016 Nuxi, https://nuxi.nl/
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+
+#include <assert.h>
+#include <err.h>
+#include <errno.h>
+#include <math.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/*
+ * Cursor for iterating over all of the system's sysctl OIDs.
+ */
+struct oid {
+ int id[CTL_MAXNAME];
+ size_t len;
+};
+
+/* Initializes the cursor to point to start of the tree. */
+static void
+oid_get_root(struct oid *o)
+{
+
+ o->id[0] = 1;
+ o->len = 1;
+}
+
+/* Obtains the OID for a sysctl by name. */
+static void
+oid_get_by_name(struct oid *o, const char *name)
+{
+
+ o->len = nitems(o->id);
+ if (sysctlnametomib(name, o->id, &o->len) != 0)
+ err(1, "sysctl(%s)", name);
+}
+
+/* Returns whether an OID is placed below another OID. */
+static bool
+oid_is_beneath(struct oid *oa, struct oid *ob)
+{
+
+ return (oa->len >= ob->len &&
+ memcmp(oa->id, ob->id, ob->len * sizeof(oa->id[0])) == 0);
+}
+
+/* Advances the cursor to the next OID. */
+static bool
+oid_get_next(const struct oid *cur, struct oid *next)
+{
+ int lookup[CTL_MAXNAME + 2];
+ size_t nextsize;
+
+ lookup[0] = 0;
+ lookup[1] = 2;
+ memcpy(lookup + 2, cur->id, cur->len * sizeof(lookup[0]));
+ nextsize = sizeof(next->id);
+ if (sysctl(lookup, 2 + cur->len, &next->id, &nextsize, 0, 0) != 0) {
+ if (errno == ENOENT)
+ return (false);
+ err(1, "sysctl(next)");
+ }
+ next->len = nextsize / sizeof(next->id[0]);
+ return (true);
+}
+
+/*
+ * OID formatting metadata.
+ */
+struct oidformat {
+ unsigned int kind;
+ char format[BUFSIZ];
+};
+
+/* Returns whether the OID represents a temperature value. */
+static bool
+oidformat_is_temperature(const struct oidformat *of)
+{
+
+ return (of->format[0] == 'I' && of->format[1] == 'K');
+}
+
+/* Fetches the formatting metadata for an OID. */
+static bool
+oid_get_format(const struct oid *o, struct oidformat *of)
+{
+ int lookup[CTL_MAXNAME + 2];
+ size_t oflen;
+
+ lookup[0] = 0;
+ lookup[1] = 4;
+ memcpy(lookup + 2, o->id, o->len * sizeof(lookup[0]));
+ oflen = sizeof(*of);
+ if (sysctl(lookup, 2 + o->len, of, &oflen, 0, 0) != 0) {
+ if (errno == ENOENT)
+ return (false);
+ err(1, "sysctl(oidfmt)");
+ }
+ return (true);
+}
+
+/*
+ * Container for holding the value of an OID.
+ */
+struct oidvalue {
+ enum { SIGNED, UNSIGNED, FLOAT } type;
+ union {
+ intmax_t s;
+ uintmax_t u;
+ double f;
+ } value;
+};
+
+/* Extracts the value of an OID, converting it to a floating-point number. */
+static double
+oidvalue_get_float(const struct oidvalue *ov)
+{
+
+ switch (ov->type) {
+ case SIGNED:
+ return (ov->value.s);
+ case UNSIGNED:
+ return (ov->value.u);
+ case FLOAT:
+ return (ov->value.f);
+ default:
+ assert(0 && "Unknown value type");
+ }
+}
+
+/* Sets the value of an OID as a signed integer. */
+static void
+oidvalue_set_signed(struct oidvalue *ov, intmax_t s)
+{
+
+ ov->type = SIGNED;
+ ov->value.s = s;
+}
+
+/* Sets the value of an OID as an unsigned integer. */
+static void
+oidvalue_set_unsigned(struct oidvalue *ov, uintmax_t u)
+{
+
+ ov->type = UNSIGNED;
+ ov->value.u = u;
+}
+
+/* Sets the value of an OID as a floating-point number. */
+static void
+oidvalue_set_float(struct oidvalue *ov, double f)
+{
+
+ ov->type = FLOAT;
+ ov->value.f = f;
+}
+
+/* Prints the value of an OID to a file stream. */
+static void
+oidvalue_print(const struct oidvalue *ov, FILE *fp)
+{
+
+ switch (ov->type) {
+ case SIGNED:
+ fprintf(fp, "%jd", ov->value.s);
+ break;
+ case UNSIGNED:
+ fprintf(fp, "%ju", ov->value.u);
+ break;
+ case FLOAT:
+ switch (fpclassify(ov->value.f)) {
+ case FP_INFINITE:
+ if (signbit(ov->value.f))
+ fprintf(fp, "-Inf");
+ else
+ fprintf(fp, "+Inf");
+ break;
+ case FP_NAN:
+ fprintf(fp, "Nan");
+ break;
+ default:
+ fprintf(fp, "%.2f", ov->value.f);
+ break;
+ }
+ break;
+ }
+}
+
+/* Fetches the value of an OID. */
+static bool
+oid_get_value(const struct oid *o, const struct oidformat *of,
+ struct oidvalue *ov)
+{
+
+ switch (of->kind & CTLTYPE) {
+#define GET_VALUE(ctltype, type) \
+ case (ctltype): { \
+ type value; \
+ size_t valuesize; \
+ \
+ valuesize = sizeof(value); \
+ if (sysctl(o->id, o->len, &value, &valuesize, 0, 0) != 0) \
+ return (false); \
+ if ((type)-1 > 0) \
+ oidvalue_set_unsigned(ov, value); \
+ else \
+ oidvalue_set_signed(ov, value); \
+ break; \
+ }
+ GET_VALUE(CTLTYPE_INT, int);
+ GET_VALUE(CTLTYPE_UINT, unsigned int);
+ GET_VALUE(CTLTYPE_LONG, long);
+ GET_VALUE(CTLTYPE_ULONG, unsigned long);
+ GET_VALUE(CTLTYPE_S8, int8_t);
+ GET_VALUE(CTLTYPE_U8, uint8_t);
+ GET_VALUE(CTLTYPE_S16, int16_t);
+ GET_VALUE(CTLTYPE_U16, uint16_t);
+ GET_VALUE(CTLTYPE_S32, int32_t);
+ GET_VALUE(CTLTYPE_U32, uint32_t);
+ GET_VALUE(CTLTYPE_S64, int64_t);
+ GET_VALUE(CTLTYPE_U64, uint64_t);
+#undef GET_VALUE
+ default:
+ return (false);
+ }
+
+ /* Convert temperatures from decikelvin to degrees Celcius. */
+ if (oidformat_is_temperature(of)) {
+ double v;
+ int e;
+
+ v = oidvalue_get_float(ov);
+ if (v < 0) {
+ oidvalue_set_float(ov, NAN);
+ } else {
+ e = of->format[2] >= '0' && of->format[2] <= '9' ?
+ of->format[2] - '0' : 1;
+ oidvalue_set_float(ov, v / pow(10, e) - 273.15);
+ }
+ }
+ return (true);
+}
+
+/*
+ * The full name of an OID, stored as a series of components.
+ */
+struct oidname {
+ struct oid oid;
+ char name_buf[BUFSIZ];
+ size_t name_end[CTL_MAXNAME];
+ char label_buf[BUFSIZ];
+ size_t label_end[CTL_MAXNAME];
+};
+
+/*
+ * Initializes the OID name object with an empty value.
+ */
+static void
+oidname_init(struct oidname *on)
+{
+
+ on->oid.len = 0;
+}
+
+/* Fetches the name of an OID, partiall reusing the previous results. */
+static void
+oid_get_name(const struct oid *o, struct oidname *on)
+{
+ size_t i, name_start, label_start;
+
+ /* No need to fetch components that we already have. */
+ name_start = label_start = 0;
+ for (i = 0; i < o->len && i < on->oid.len && o->id[i] == on->oid.id[i];
+ ++i) {
+ name_start = on->name_end[i];
+ if (on->label_end[i] != 0)
+ label_start = on->label_end[i];
+ }
+
+ /* Fetch the remainder. */
+ for (; i < o->len; ++i) {
+ int lookup[CTL_MAXNAME + 2];
+ char buf[BUFSIZ];
+ size_t len;
+
+ /* Look up the name of the component. */
+ lookup[0] = 0;
+ lookup[1] = 1;
+ memcpy(lookup + 2, o->id, (i + 1) * sizeof(lookup[0]));
+ len = sizeof(buf);
+ if (sysctl(lookup, 2 + i + 1, buf, &len, 0, 0) == 0) {
+ char *name;
+
+ name = strrchr(buf, '.');
+ if (name == NULL) {
+ name = buf;
+ } else {
+ ++name;
+ len -= name - buf;
+ }
+
+ assert(name_start + len <= sizeof(on->name_buf));
+ memcpy(on->name_buf + name_start, name, len);
+ on->name_end[i] = name_start += len;
+ } else {
+ err(1, "sysctl(name)");
+ }
+
+ /* Look up the optional label, allowing aggregation. */
+ lookup[1] = 6;
+ len = sizeof(buf);
+ if (sysctl(lookup, 2 + i + 1, buf, &len, 0, 0) == 0) {
+ assert(label_start + len <= sizeof(on->label_buf));
+ memcpy(on->label_buf + label_start, buf, len);
+ on->label_end[i] = label_start += len;
+ } else if (errno == ENOENT) {
+ on->label_end[i] = 0;
+ } else {
+ err(1, "sysctl(oidlabel)");
+ }
+ }
+ on->oid = *o;
+}
+
+/* Prints the name and labels of an OID to a file stream. */
+static void
+oidname_print(const struct oidname *on, const struct oidformat *of,
+ FILE *fp)
+{
+ const char *name, *label;
+ size_t i;
+ char separator;
+
+ /* Print the name of the metric. */
+ fprintf(fp, "sysctl");
+ name = on->name_buf;
+ for (i = 0; i < on->oid.len; ++i) {
+ if (on->label_end[i] == 0) {
+ assert(name[strspn(name,
+ "abcdefghijklmnopqrstuvwxyz"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "0123456789_")] == '\0');
+ fprintf(fp, "_%s", name);
+ }
+ name = on->name_buf + on->name_end[i];
+ }
+ if (oidformat_is_temperature(of))
+ fprintf(fp, "_celcius");
+
+ /* Print the labels of the metric. */
+ label = on->label_buf;
+ name = on->name_buf;
+ separator = '{';
+ for (i = 0; i < on->oid.len; ++i) {
+ if (on->label_end[i] != 0) {
+ assert(name[strspn(name,
+ "abcdefghijklmnopqrstuvwxyz"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "0123456789_-")] == '\0');
+ assert(label[strspn(label,
+ "abcdefghijklmnopqrstuvwxyz"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "0123456789_")] == '\0');
+ fprintf(fp, "%c%s=\"%s\"", separator, label, name);
+ separator = ',';
+ label = on->label_buf + on->label_end[i];
+ }
+ name = on->name_buf + on->name_end[i];
+ }
+ if (separator != '{')
+ fputc('}', fp);
+}
+
+/* Returns whether the OID name has any labels associated to it. */
+static bool
+oidname_has_labels(const struct oidname *on)
+{
+ size_t i;
+
+ for (i = 0; i < on->oid.len != 0; ++i)
+ if (on->label_end[i] != 0)
+ return (true);
+ return (false);
+}
+
+/*
+ * The description of an OID.
+ */
+struct oiddescription {
+ char description[BUFSIZ];
+};
+
+/*
+ * Fetches the description of an OID.
+ */
+static bool
+oid_get_description(const struct oid *o, struct oiddescription *od)
+{
+ int lookup[CTL_MAXNAME + 2];
+ char *newline;
+ size_t odlen;
+
+ lookup[0] = 0;
+ lookup[1] = 5;
+ memcpy(lookup + 2, o->id, o->len * sizeof(lookup[0]));
+ odlen = sizeof(od->description);
+ if (sysctl(lookup, 2 + o->len, &od->description, &odlen, 0, 0) != 0) {
+ if (errno == ENOENT)
+ return (false);
+ err(1, "sysctl(oiddescr)");
+ }
+
+ newline = strchr(od->description, '\n');
+ if (newline != NULL)
+ *newline = '\0';
+
+ return (*od->description != '\0');
+}
+
+/* Prints the description of an OID to a file stream. */
+static void
+oiddescription_print(const struct oiddescription *od, FILE *fp)
+{
+
+ fprintf(fp, "%s", od->description);
+}
+
+static void
+oid_print(const struct oid *o, struct oidname *on, bool print_description,
+ FILE *fp)
+{
+ struct oidformat of;
+ struct oidvalue ov;
+ struct oiddescription od;
+
+ if (!oid_get_format(o, &of) || !oid_get_value(o, &of, &ov))
+ return;
+ oid_get_name(o, on);
+
+ /*
+ * Print the line with the description. Prometheus expects a
+ * single unique description for every metric, which cannot be
+ * guaranteed by sysctl if labels are present. Omit the
+ * description if labels are present.
+ */
+ if (print_description && !oidname_has_labels(on) &&
+ oid_get_description(o, &od)) {
+ fprintf(fp, "# HELP ");
+ oidname_print(on, &of, fp);
+ fputc(' ', fp);
+ oiddescription_print(&od, fp);
+ fputc('\n', fp);
+ }
+
+ /* Print the line with the value. */
+ oidname_print(on, &of, fp);
+ fputc(' ', fp);
+ oidvalue_print(&ov, fp);
+ fputc('\n', fp);
+}
+
+static void
+usage(void)
+{
+
+ fprintf(stderr,
+ "usage: prometheus_sysctl_exporter [-dh] [prefix ...]\n");
+ exit(1);
+}
+
+int
+main(int argc, char *argv[])
+{
+ struct oidname on;
+ char *http_buf;
+ FILE *fp;
+ size_t http_buflen;
+ int ch;
+ bool http_mode, print_descriptions;
+
+ /* Parse command line flags. */
+ http_mode = print_descriptions = false;
+ while ((ch = getopt(argc, argv, "dh")) != -1) {
+ switch (ch) {
+ case 'd':
+ print_descriptions = true;
+ break;
+ case 'h':
+ http_mode = true;
+ break;
+ default:
+ usage();
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ /* HTTP output: cache metrics in buffer. */
+ if (http_mode) {
+ fp = open_memstream(&http_buf, &http_buflen);
+ if (fp == NULL)
+ err(1, "open_memstream");
+ } else {
+ fp = stdout;
+ }
+
+ oidname_init(&on);
+ if (argc == 0) {
+ struct oid o;
+
+ /* Print all OIDs. */
+ oid_get_root(&o);
+ do {
+ oid_print(&o, &on, print_descriptions, fp);
+ } while (oid_get_next(&o, &o));
+ } else {
+ int i;
+
+ /* Print only trees provided as arguments. */
+ for (i = 0; i < argc; ++i) {
+ struct oid o, root;
+
+ oid_get_by_name(&root, argv[i]);
+ o = root;
+ do {
+ oid_print(&o, &on, print_descriptions, fp);
+ } while (oid_get_next(&o, &o) &&
+ oid_is_beneath(&o, &root));
+ }
+ }
+
+ if (http_mode) {
+ if (ferror(fp) || fclose(fp) != 0)
+ err(1, "Cannot generate output");
+
+ /* Print HTTP header and metrics. */
+ dprintf(STDOUT_FILENO,
+ "HTTP/1.1 200 OK\r\n"
+ "Connection: close\r\n"
+ "Content-Length: %zu\r\n"
+ "Content-Type: text/plain; version=0.0.4\r\n"
+ "\r\n",
+ http_buflen);
+ write(STDOUT_FILENO, http_buf, http_buflen);
+
+ /* Drain output. */
+ if (shutdown(STDIN_FILENO, SHUT_WR) == 0) {
+ char buf[1024];
+
+ while (read(STDIN_FILENO, buf, sizeof(buf)) > 0) {
+ }
+ }
+ }
+ return (0);
+}

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