Various minor fixes and cleanups

* Delete duct-tape/Makefile (it's a copy of the LKM's Makefile)
  * Add a slash between the prefix directory and the socket filename so the socket is actually *in* the prefix and not next to it.
  * Disable console logging by default and introduce a `DSERVER_LOG_STDERR` env var to optionally enable it
  * EPIPE means the peer of the first message in a message queue died, so just drop the message; the main event loop will soon notice (via pidfd) that the peer died.

duct-tape/Makefile

@@ -1,631 +0,0 @@
-BUILD_ROOT := $(src)
-
-ifndef MIGDIR
-$(error Darling's kernel module is now built differently. \
-	Please run 'make lkm' and 'make lkm_install' inside your CMake build directory)
-endif
-
-#
-# ***
-# general
-# ***
-#
-
-USE_NEW_PTHREAD_CODE ?= 0
-
-ifneq (,$(findstring clang,$(CC)))
-	COMPILER_NAME := CLANG
-else
-	COMPILER_NAME := GCC
-endif
-
-asflags-y := -D__DARLING__ -D__NO_UNDERSCORES__ \
-	-I$(MIGDIR)/osfmk \
-	-I$(BUILD_ROOT)/osfmk \
-	-I$(BUILD_ROOT)/duct/defines
-
-WARNING_FLAGS := \
-	-Wno-unknown-pragmas \
-	-Wno-error=cast-align \
-	-Wno-unused-parameter \
-	-Wno-missing-prototypes \
-	-Wno-unused-variable \
-	-Wno-declaration-after-statement \
-	-Wno-undef \
-	-Wno-maybe-uninitialized
-
-GCC_WARNING_FLAGS := \
-	-Wno-attributes \
-	-Wno-int-to-pointer-cast
-
-CLANG_WARNING_FLAGS := \
-	-Wno-unknown-warning-option \
-	-Wno-ignored-optimization-argument \
-	-Wno-gnu-variable-sized-type-not-at-end
-
-FEATURE_FLAGS := \
-	-fno-builtin \
-	-fno-common \
-	-fsigned-bitfields \
-	-fno-strict-aliasing \
-	-fno-keep-inline-functions \
-	-mfentry
-
-GCC_FEATURE_FLAGS := \
-	-freorder-blocks
-
-# NOTE: we should further sort these
-# e.g. something like MACH_DEFINES for definitions that enable certain behaviors in the XNU code,
-#      and DARLING_DEFINES for our own personal definitions, and maybe LINUX_DEFINES for definitions
-#      that affect Linux headers, and then OTHER_DEFINES for everything else
-DEFINES := \
-	-D__DARLING__ \
-	-DDARLING_DEBUG \
-	-DPAGE_SIZE_FIXED \
-	-DCONFIG_SCHED_TRADITIONAL \
-	-DCONFIG_SCHED_TIMESHARE_CORE \
-	-DAPPLE \
-	-DKERNEL \
-	-DKERNEL_PRIVATE \
-	-DXNU_KERNEL_PRIVATE \
-	-DPRIVATE \
-	-D__MACHO__=1 \
-	-Dvolatile=__volatile \
-	-DNEXT \
-	-D__LITTLE_ENDIAN__=1 \
-	-D__private_extern__=extern \
-	-D_MODE_T \
-	-D_NLINK_T \
-	-DVM32_SUPPORT=1 \
-	-DMACH_KERNEL_PRIVATE \
-	-DARCH_PRIVATE \
-	-DDRIVER_PRIVATE \
-	-D_KERNEL_BUILD \
-	-DKERNEL_BUILD \
-	-DMACH_KERNEL \
-	-DBSD_BUILD \
-	-DBSD_KERNEL_PRIVATE \
-	-DLP64KERN=1 \
-	-DLP64_DEBUG=0 \
-	-DTIMEZONE=0 \
-	-DPST=0 \
-	-DQUOTA \
-	-DABSOLUTETIME_SCALAR_TYPE \
-	-DCONFIG_LCTX \
-	-DMACH \
-	-DCONFIG_ZLEAKS \
-	-DNO_DIRECT_RPC \
-	-DIPFIREWALL_FORWARD \
-	-DIPFIREWALL_DEFAULT_TO_ACCEPT \
-	-DTRAFFIC_MGT \
-	-DRANDOM_IP_ID \
-	-DTCP_DROP_SYNFIN \
-	-DICMP_BANDLIM \
-	-DIFNET_INPUT_SANITY_CHK \
-	-DPSYNCH \
-	-DSECURE_KERNEL \
-	-DOLD_SEMWAIT_SIGNAL \
-	-DCONFIG_MBUF_JUMBO \
-	-DCONFIG_WORKQUEUE \
-	-DCONFIG_HFS_STD \
-	-DCONFIG_HFS_TRIM \
-	-DCONFIG_TASK_MAX=512 \
-	-DCONFIG_IPC_TABLE_ENTRIES_STEPS=256 \
-	-DNAMEDSTREAMS \
-	-DCONFIG_VOLFS \
-	-DCONFIG_IMGSRC_ACCESS \
-	-DCONFIG_TRIGGERS \
-	-DCONFIG_VFS_FUNNEL \
-	-DCONFIG_EXT_RESOLVER \
-	-DCONFIG_SEARCHFS \
-	-DIPSEC \
-	-DIPSEC_ESP \
-	-DIPV6FIREWALL_DEFAULT_TO_ACCEPT \
-	-Dcrypto \
-	-Drandomipid \
-	-DCONFIG_KN_HASHSIZE=64 \
-	-DCONFIG_VNODES=750 \
-	-DCONFIG_VNODE_FREE_MIN=75 \
-	-DCONFIG_NC_HASH=1024 \
-	-DCONFIG_VFS_NAMES=2048 \
-	-DCONFIG_MAX_CLUSTERS=4 \
-	-DKAUTH_CRED_PRIMES_COUNT=3 \
-	-DKAUTH_CRED_PRIMES="{5, 17, 97}" \
-	-DCONFIG_MIN_NBUF=64 \
-	-DCONFIG_MIN_NIOBUF=32 \
-	-DCONFIG_NMBCLUSTERS="((1024 * 256) / MCLBYTES)" \
-	-DCONFIG_TCBHASHSIZE=128 \
-	-DCONFIG_ICMP_BANDLIM=50 \
-	-DCONFIG_AIO_MAX=10 \
-	-DCONFIG_AIO_PROCESS_MAX=4 \
-	-DCONFIG_AIO_THREAD_COUNT=2 \
-	-DCONFIG_THREAD_MAX=1024 \
-	-DCONFIG_MAXVIFS=2 \
-	-DCONFIG_MFCTBLSIZ=16 \
-	-DCONFIG_MSG_BSIZE=4096 \
-	-DCONFIG_ENFORCE_SIGNED_CODE \
-	-DCONFIG_MEMORYSTATUS \
-	-DCONFIG_JETSAM \
-	-DCONFIG_FREEZE \
-	-DCONFIG_ZLEAK_ALLOCATION_MAP_NUM=8192 \
-	-DCONFIG_ZLEAK_TRACE_MAP_NUM=4096 \
-	-DVM_PRESSURE_EVENTS \
-	-DCONFIG_KERNEL_0DAY_SYSCALL_HANDLER \
-	-DEVENTMETER \
-	-DCONFIG_APP_PROFILE=0 \
-	-DCC_USING_FENTRY=1 \
-	-DIMPORTANCE_INHERITANCE=1 \
-	-DMACH_BSD=1 \
-	-DCONFIG_REQUIRES_U32_MUNGING=1
-
-OTHER_FLAGS := \
-	-std=gnu11
-
-GCC_OTHER_FLAGS := \
-	-include $(BUILD_ROOT)/include/duct/compiler/gcc/has-builtin.h
-
-ccflags-y := $(WARNING_FLAGS) $(FEATURE_FLAGS) $(DEFINES) $(OTHER_FLAGS) \
-             $($(COMPILER_NAME)_WARNING_FLAGS) $($(COMPILER_NAME)_FEATURE_FLAGS) $($(COMPILER_NAME)_DEFINES) $($(COMPILER_NAME)_OTHER_FLAGS)
-
-#
-# ***
-# darling-mach
-# ***
-#
-
-#
-# object lists
-# remember to reference subdirectories by including the subdirectory variables as part of the list
-# e.g.
-#     OBJS_osfmk = \
-#     	$(OBJS_osfmk/cool-subdir) \
-#     	some_random_object.o \
-#     	this_other_dude.o \
-#     	$(OBJS_osfmk/whatever) \
-#     	coolness.o
-# note that order doesn't matter, although you'll probably want to keep it sorted and have subdirs separate from objects
-# remember to create these as lazily-evaluated variables
-#
-
-#
-# osfmk/
-#
-OBJS_osfmk = \
-	$(OBJS_osfmk/ipc) \
-	$(OBJS_osfmk/kern) \
-	$(OBJS_osfmk/prng) \
-	$(OBJS_osfmk/duct)
-OBJS_osfmk/ipc = \
-	osfmk/ipc/ipc_entry.o \
-	osfmk/ipc/ipc_hash.o \
-	osfmk/ipc/ipc_importance.o \
-	osfmk/ipc/ipc_init.o \
-	osfmk/ipc/ipc_kmsg.o \
-	osfmk/ipc/ipc_mqueue.o \
-	osfmk/ipc/ipc_notify.o \
-	osfmk/ipc/ipc_object.o \
-	osfmk/ipc/ipc_port.o \
-	osfmk/ipc/ipc_pset.o \
-	osfmk/ipc/ipc_right.o \
-	osfmk/ipc/ipc_space.o \
-	osfmk/ipc/ipc_table.o \
-	osfmk/ipc/ipc_voucher.o \
-	osfmk/ipc/mach_debug.o \
-	osfmk/ipc/mach_kernelrpc.o \
-	osfmk/ipc/mach_msg.o \
-	osfmk/ipc/mach_port.o \
-	osfmk/ipc/mig_log.o
-OBJS_osfmk/kern = \
-	osfmk/kern/clock_oldops.o \
-	osfmk/kern/exception.o \
-	osfmk/kern/host.o \
-	osfmk/kern/ipc_clock.o \
-	osfmk/kern/ipc_host.o \
-	osfmk/kern/ipc_kobject.o \
-	osfmk/kern/ipc_mig.o \
-	osfmk/kern/ipc_misc.o \
-	osfmk/kern/ipc_sync.o \
-	osfmk/kern/ipc_tt.o \
-	osfmk/kern/locks.o \
-	osfmk/kern/ltable.o \
-	osfmk/kern/mk_timer.o \
-	osfmk/kern/mpsc_queue.o \
-	osfmk/kern/priority_queue.o \
-	osfmk/kern/restartable.o \
-	osfmk/kern/sync_sema.o \
-	osfmk/kern/turnstile.o \
-	osfmk/kern/ux_handler.o \
-	osfmk/kern/waitq.o \
-	osfmk/kern/work_interval.o
-OBJS_osfmk/prng = \
-	osfmk/prng/prng_random.o
-OBJS_osfmk/duct = \
-	osfmk/duct/darling_xnu_init.o \
-	osfmk/duct/duct_arch_thread.o \
-	osfmk/duct/duct_arm_locks_arm.o \
-	osfmk/duct/duct_atomic.o \
-	osfmk/duct/duct_ipc_pset.o \
-	osfmk/duct/duct_kern_bsd_kern.o \
-	osfmk/duct/duct_kern_clock.o \
-	osfmk/duct/duct_kern_debug.o \
-	osfmk/duct/duct_kern_kalloc.o \
-	osfmk/duct/duct_kern_printf.o \
-	osfmk/duct/duct_kern_sched_prim.o \
-	osfmk/duct/duct_kern_startup.o \
-	osfmk/duct/duct_kern_sysctl.o \
-	osfmk/duct/duct_kern_task.o \
-	osfmk/duct/duct_kern_task_policy.o \
-	osfmk/duct/duct_kern_thread_act.o \
-	osfmk/duct/duct_kern_thread_call.o \
-	osfmk/duct/duct_kern_thread_policy.o \
-	osfmk/duct/duct_kern_thread.o \
-	osfmk/duct/duct_kern_timer_call.o \
-	osfmk/duct/duct_kern_zalloc.o \
-	osfmk/duct/duct_libsa.o \
-	osfmk/duct/duct_machine_routines.o \
-	osfmk/duct/duct_machine_rtclock.o \
-	osfmk/duct/duct_pcb.o \
-	osfmk/duct/duct_vm_init.o \
-	osfmk/duct/duct_vm_kern.o \
-	osfmk/duct/duct_vm_map.o \
-	osfmk/duct/duct_vm_user.o
-
-#
-# bsd/
-#
-OBJS_bsd = \
-	$(OBJS_bsd/kern) \
-	$(OBJS_bsd/pthread) \
-	$(OBJS_bsd/uxkern) \
-	$(OBJS_bsd/duct)
-OBJS_bsd/kern = \
-	bsd/kern/kern_malloc.o \
-	bsd/kern/qsort.o
-OBJS_bsd/pthread = \
-	bsd/pthread/pthread_priority.o \
-	bsd/pthread/pthread_shims.o
-OBJS_bsd/uxkern = \
-	bsd/uxkern/ux_exception.o
-OBJS_bsd/duct = \
-	bsd/duct/duct_dev_arch_systemcalls.o \
-	bsd/duct/duct_kern_bsd_init.o \
-	bsd/duct/duct_kern_bsd_stubs.o \
-	bsd/duct/duct_kern_kern_descrip.o \
-	bsd/duct/duct_kern_kern_fork.o \
-	bsd/duct/duct_kern_kern_proc.o \
-	bsd/duct/duct_kern_kern_sig.o \
-	bsd/duct/duct_kern_kern_subr.o \
-	bsd/duct/duct_kern_kern_time.o \
-	bsd/duct/duct_uxkern_ux_exception.o
-
-#
-# duct/
-#
-OBJS_duct = \
-	$(OBJS_duct/osfmk) \
-	$(OBJS_duct/bsd)
-OBJS_duct/osfmk = \
-	duct/osfmk/dummy-arch-thread.o \
-	duct/osfmk/dummy-bank-bank.o \
-	duct/osfmk/dummy-kern-audit-sessionport.o \
-	duct/osfmk/dummy-kern-clock-oldops.o \
-	duct/osfmk/dummy-kern-host-notify.o \
-	duct/osfmk/dummy-kern-kmod.o \
-	duct/osfmk/dummy-kern-locks.o \
-	duct/osfmk/dummy-kern-machine.o \
-	duct/osfmk/dummy-kern-mk-sp.o \
-	duct/osfmk/dummy-kern-priority.o \
-	duct/osfmk/dummy-kern-processor.o \
-	duct/osfmk/dummy-kern-sched-prim.o \
-	duct/osfmk/dummy-kern-sync-lock.o \
-	duct/osfmk/dummy-kern-syscall-emulation.o \
-	duct/osfmk/dummy-kern-task-policy.o \
-	duct/osfmk/dummy-kern-task.o \
-	duct/osfmk/dummy-kern-thread-act.o \
-	duct/osfmk/dummy-kern-thread-call.o \
-	duct/osfmk/dummy-kern-thread-policy.o \
-	duct/osfmk/dummy-kern-thread.o \
-	duct/osfmk/dummy-kern-zalloc.o \
-	duct/osfmk/dummy-kern.o \
-	duct/osfmk/dummy-locks.o \
-	duct/osfmk/dummy-machine.o \
-	duct/osfmk/dummy-misc.o \
-	duct/osfmk/dummy-vm-debug.o \
-	duct/osfmk/dummy-vm-kern.o \
-	duct/osfmk/dummy-vm-map.o \
-	duct/osfmk/dummy-vm-memory-object.o \
-	duct/osfmk/dummy-vm-resident.o \
-	duct/osfmk/dummy-vm-user.o
-OBJS_duct/bsd = \
-	duct/bsd/dummy-init.o \
-	duct/bsd/dummy-kdebug.o
-
-#
-# libkern/
-#
-OBJS_libkern = \
-	$(OBJS_libkern/gen) \
-	$(OBJS_libkern/os) \
-	$(OBJS_libkern/duct)
-OBJS_libkern/gen = \
-	libkern/gen/OSAtomicOperations.o
-OBJS_libkern/os = \
-	libkern/os/refcnt.o
-OBJS_libkern/duct = \
-	libkern/duct/duct_cpp_OSRuntime.o
-
-#
-# pexpert/
-#
-OBJS_pexpert = \
-	$(OBJS_pexpert/duct)
-OBJS_pexpert/duct = \
-	pexpert/duct/duct_gen_bootargs.o \
-	pexpert/duct/duct_pe_kprintf.o
-
-#
-# <migdir>/osfmk/
-#
-OBJS_$(MIGDIR_REL)/osfmk = \
-	$(OBJS_$(MIGDIR_REL)/osfmk/mach) \
-	$(OBJS_$(MIGDIR_REL)/osfmk/device) \
-	$(OBJS_$(MIGDIR_REL)/osfmk/UserNotification)
-OBJS_$(MIGDIR_REL)/osfmk/mach = \
-	$(MIGDIR_REL)/osfmk/mach/clock_priv_server.o \
-	$(MIGDIR_REL)/osfmk/mach/clock_reply_user.o \
-	$(MIGDIR_REL)/osfmk/mach/clock_server.o \
-	$(MIGDIR_REL)/osfmk/mach/exc_user.o \
-	$(MIGDIR_REL)/osfmk/mach/exc_server.o \
-	$(MIGDIR_REL)/osfmk/mach/host_priv_server.o \
-	$(MIGDIR_REL)/osfmk/mach/host_security_server.o \
-	$(MIGDIR_REL)/osfmk/mach/lock_set_server.o \
-	$(MIGDIR_REL)/osfmk/mach/mach_exc_server.o \
-	$(MIGDIR_REL)/osfmk/mach/mach_exc_user.o \
-	$(MIGDIR_REL)/osfmk/mach/mach_host_server.o \
-	$(MIGDIR_REL)/osfmk/mach/mach_port_server.o \
-	$(MIGDIR_REL)/osfmk/mach/mach_vm_server.o \
-	$(MIGDIR_REL)/osfmk/mach/mach_voucher_attr_control_server.o \
-	$(MIGDIR_REL)/osfmk/mach/mach_voucher_server.o \
-	$(MIGDIR_REL)/osfmk/mach/memory_entry_server.o \
-	$(MIGDIR_REL)/osfmk/mach/notify_user.o \
-	$(MIGDIR_REL)/osfmk/mach/processor_server.o \
-	$(MIGDIR_REL)/osfmk/mach/processor_set_server.o \
-	$(MIGDIR_REL)/osfmk/mach/restartable_server.o \
-	$(MIGDIR_REL)/osfmk/mach/task_server.o \
-	$(MIGDIR_REL)/osfmk/mach/thread_act_server.o
-OBJS_$(MIGDIR_REL)/osfmk/device = \
-	$(MIGDIR_REL)/osfmk/device/device_server.o
-OBJS_$(MIGDIR_REL)/osfmk/UserNotification = \
-	$(MIGDIR_REL)/osfmk/UserNotification/UNDReplyServer.o
-
-ifeq ($(USE_NEW_PTHREAD_CODE),1)
-  OBJS_dthread = \
-    dthread/kern_synch.o \
-    dthread/pthread_kext.o
-
-  CFLAGS_dthread = \
-    -DBUILDING_DTHREAD=1 \
-    -I$(BUILD_ROOT)/dthread/include
-
-  OBJS_old_psynch =
-else
-  OBJS_dthread =
-
-  OBJS_old_psynch = \
-    darling/psynch_support.o \
-    darling/pthread_kext.o
-endif
-
-#
-# darling/
-#
-OBJS_darling = \
-	darling/binfmt.o \
-	darling/commpage.o \
-	darling/continuation-asm.o \
-	darling/continuation.o \
-	darling/down_interruptible.o \
-	darling/foreign_mm.o \
-	darling/host_info.o \
-	darling/kqueue.o \
-	darling/module.o \
-	darling/procs.o \
-	darling/pthread_kill.o \
-	darling/task_registry.o \
-	darling/traps.o \
-	darling/uthreads.o \
-	$(OBJS_old_psynch)
-
-#
-# full list of all objects in the darling-mach kernel module
-#
-DARLING_MACH_ALL_OBJS = \
-	$(OBJS_osfmk) \
-	$(OBJS_bsd) \
-	$(OBJS_duct) \
-	$(OBJS_libkern) \
-	$(OBJS_pexpert) \
-	$(OBJS_$(MIGDIR_REL)/osfmk) \
-	$(OBJS_darling) \
-	$(OBJS_dthread)
-
-#
-# normal includes
-# these come after any parent directory includes for each object
-#
-DARLING_MACH_NORMAL_INCLUDES := \
-	-I$(BUILD_ROOT)/EXTERNAL_HEADERS \
-	-I$(BUILD_ROOT)/duct/defines \
-	-I$(BUILD_ROOT)/osfmk \
-	-I$(MIGDIR)/bsd \
-	-I$(BUILD_ROOT)/bsd \
-	-I$(BUILD_ROOT)/iokit \
-	-I$(BUILD_ROOT)/libkern \
-	-I$(BUILD_ROOT)/libsa \
-	-I$(BUILD_ROOT)/pexpert \
-	-I$(BUILD_ROOT)/security \
-	-I$(BUILD_ROOT)/export-headers \
-	-I$(BUILD_ROOT)/osfmk/libsa \
-	-I$(BUILD_ROOT)/osfmk/mach_debug \
-	-I$(BUILD_ROOT)/ \
-	-I$(BUILD_ROOT)/darling \
-	-I$(MIGDIR)/osfmk \
-	-I$(MIGDIR)/../../startup \
-	-I$(BUILD_ROOT)/include
-
-#
-# special flags for the generated files in the MIG directory
-#
-CFLAGS_$(MIGDIR_REL) = \
-	-include $(BUILD_ROOT)/osfmk/duct/duct.h \
-	-include $(BUILD_ROOT)/osfmk/duct/duct_pre_xnu.h
-INCLUDE_OVERRIDES_$(MIGDIR_REL) = \
-	-I$(BUILD_ROOT)/osfmk
-INCLUDE_OVERRIDES_$(MIGDIR_REL)/osfmk/mach = \
-	-I$(BUILD_ROOT)/osfmk
-
-#
-# other special flags
-#
-CFLAGS_osfmk = -I$(BUILD_ROOT)/osfmk/kern
-
-#
-# stop KBuild from tripping up Clang
-#
-CLANG_CFLAGS_darling-mach.mod.o = \
-	-Wno-unknown-warning-option
-
-#
-# darling-mach-specific flags
-#
-DARLING_MACH_CFLAGS =
-
-#
-# ***
-# darling-overlay
-# ***
-#
-
-#
-# full list of all objects in the darling-overlay kernel module
-#
-DARLING_OVERLAY_ALL_OBJS = \
-	overlayfs/copy_up.o \
-	overlayfs/dir.o \
-	overlayfs/export.o \
-	overlayfs/file.o \
-	overlayfs/inode.o \
-	overlayfs/namei.o \
-	overlayfs/readdir.o \
-	overlayfs/super.o \
-	overlayfs/util.o
-
-#
-# normal includes
-# these come after any parent directory includes for each object
-#
-DARLING_OVERLAY_NORMAL_INCLUDES := \
-	-I$(BUILD_ROOT)/include
-
-#
-# darling-overlay-specific flags
-#
-DARLING_OVERLAY_CFLAGS =
-
-#
-# ***
-# KBuild setup
-# ***
-#
-
-# KERNELVERSION is a dmks variable to specify the right version of the kernel.
-# If this is not done like this, then when updating your kernel, you will
-# build against the wrong kernel
-KERNELVERSION = $(shell uname -r)
-$(info Running kernel version is $(KERNELVERSION))
-# If KERNELRELEASE is defined, we've been invoked from the
-# kernel build system and can use its language.
-ifneq ($(KERNELRELEASE),)
-  # can't indent with tabs here or else Make will complain
-
-  $(info Invoked by kernel build system, building for $(KERNELRELEASE))
-
-  # some Make wizardry to calculate the includes to each object
-  # we do this to ensure that the parent directories of each object come first in the search paths
-  # otherwise, for e.g., when compiling an object in `osfmk`, `kern/ast.h` in bsd might be used instead of `kern/ast.h` in osfmk
-  # this also contains logic to allow per-directory CFLAGS to be added and cascade down
-  # (subdirectory flags are added after parent directory flags, so they can override parent directory flags)
-  do_includes = \
-    $(if $(1), \
-      $(if $(shell basename '$(1)' | sed 's/^.*\.o$$//'), \
-        $(INCLUDE_OVERRIDES_$(1)) \
-        -I$(BUILD_ROOT)/$(1) \
-      ) \
-      $(if $(subst $(BUILD_ROOT)/$(MIGDIR_REL),,$(BUILD_ROOT)/$(1)), \
-        $(call do_includes,$(shell dirname '$(1)' | sed -e 's/^.$$//')) \
-      ) \
-      $(if $(shell basename '$(1)' | sed 's/^.*\.o$$//'), \
-        $(CFLAGS_$(1)) \
-        $($(COMPILER_NAME)_CFLAGS_$(1)) \
-      ) \
-    )
-
-  # for the first foreach:
-  #   the first eval is for Linux < 5.4
-  #   the second eval is for Linux >= 5.4 and is the "correct" one
-  # for the second foreach:
-  #   note that here we only have to add to the CFLAGS for the full path (the one used on Linux >= 5.4)
-  #   the first loop already created lazily-evaluated CFLAGS variables for Linux < 5.4
-  #   when those variables are used, they will automatically refer to the correct CFLAGS for the full path
-  iterate_objs = \
-    $(foreach OBJ,$($(1)_ALL_OBJS), \
-      $(eval CFLAGS_$(notdir $(OBJ)) = $$(CFLAGS_$(OBJ))) \
-      $(if $(strip $(CFLAGS_$(OBJ))), \
-        $(eval CFLAGS_$(OBJ) := $(call do_includes,$(OBJ))) \
-      , \
-        $(eval CFLAGS_$(OBJ) += $(call do_includes,$(OBJ))) \
-      ) \
-    ) \
-    $(foreach OBJ,$($(1)_ALL_OBJS), \
-      $(eval CFLAGS_$(OBJ) += $$($(1)_NORMAL_INCLUDES) $$($(1)_CFLAGS) $$($(1)_$(COMPILER_NAME)_CFLAGS)) \
-    )
-
-  # do the CFLAGS magic for all darling-mach objects
-  $(call iterate_objs,DARLING_MACH)
-
-  # add MIG flags for the MIG objects
-  $(foreach MIG_OBJ,$(MIG_OBJS), \
-    $(eval CFLAGS_$(MIG_OBJ) += $$(miggen_cflags)) \
-  )
-
-  # same as before for darling-mach, except this one is for darling-overlay
-  #$(call iterate_objs,DARLING_OVERLAY)
-
-  obj-m := darling-mach.o #darling-overlay.o
-  darling-mach-objs := $(DARLING_MACH_ALL_OBJS)
-  #darling-overlay-objs := $(DARLING_OVERLAY_ALL_OBJS)
-
-# Otherwise we were called directly from the command
-# line; invoke the kernel build system.
-else
-	KERNELDIR ?= /lib/modules/$(KERNELVERSION)/build
-	PWD := $(shell pwd)
-default:
-	rm -f darling-mach.mod.o
-	$(MAKE) -C $(KERNELDIR) M=$(PWD) modules
-
-endif
-
-all:
-	rm -f darling-mach.mod.o
-	$(MAKE) -C /lib/modules/$(KERNELVERSION)/build M=$(PWD) modules
-
-clean:
-	$(MAKE) -C /lib/modules/$(KERNELVERSION)/build M=$(PWD) clean
-	find . \( -name '*.o' -or -name '*.ko' \) -delete
-	rm -f *.mod.c
-	rm -rf modules.order Module.symvers
-
-install:
-	$(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install
-

src/darlingserver.cpp

@@ -250,7 +250,7 @@ void spawnLaunchd(const char* prefix)
 
 	// putenv("KQUEUE_DEBUG=1");
 
-	auto tmp = (std::string(prefix) + ".darlingserver.sock");
+	auto tmp = (std::string(prefix) + "/.darlingserver.sock");
 
 	const char* initPath = getenv("DSERVER_INIT");
 

src/logging.cpp

@@ -23,13 +23,6 @@
 #include <fcntl.h>
 #include <unistd.h>
 
-#ifndef LOG_TO_STDOUT
-	//#define LOG_TO_STDOUT 0
-
-	// FOR DARLINGSERVER TESTING:
-	#define LOG_TO_STDOUT 1
-#endif
-
 DarlingServer::Log::Log(std::string category):
 	_category(category)
 	{};
@@ -89,9 +82,14 @@ void DarlingServer::Log::_log(Type type, std::string message) const {
 	// NOTE: we use POSIX file APIs because we want to append each message to the log file atomically,
 	//       and as far as i can tell, C++ fstreams provide no such guarantee (that they won't write in chunks).
 	static int logFile = []() {
-		std::filesystem::path path(Server::sharedInstance().prefix() + "/private/var/log/");
+		std::filesystem::path path(Server::sharedInstance().prefix() + "/private/var/log/dserver.log");
 		std::filesystem::create_directories(path.parent_path());
-		return open(path.c_str(), O_WRONLY | O_APPEND);
+		return open(path.c_str(), O_WRONLY | O_APPEND | O_CREAT);
+	}();
+
+	static bool logToStderr = []() {
+		auto val = getenv("DSERVER_LOG_STDERR");
+		return val && strlen(val) >= 1 && (val[0] == 't' || val[0] == 'T' || val[0] == '1');
 	}();
 
 	struct timespec time;
@@ -101,7 +99,7 @@ void DarlingServer::Log::_log(Type type, std::string message) const {
 
 	write(logFile, messageToLog.c_str(), messageToLog.size());
 
-#if LOG_TO_STDOUT
+	if (logToStderr) {
-	write(STDOUT_FILENO, messageToLog.c_str(), messageToLog.size());
+		write(STDERR_FILENO, messageToLog.c_str(), messageToLog.size());
-#endif
+	}
 };

src/message.cpp

@@ -503,6 +503,11 @@ bool DarlingServer::MessageQueue::sendMany(int socket) {
 				break;
 			} else if (errno == EINTR) {
 				ret = 0;
+			} else if (errno == EPIPE) {
+				// this means that peer of the first message we tried to send has died.
+				// we'll just drop that message and try the others.
+				_messages.pop_front();
+				ret = 0;
 			} else {
 				throw std::system_error(errno, std::generic_category(), "Failed to send messages through socket");
 			}

src/server.cpp

@@ -217,7 +217,7 @@ struct DTapeHooks {
 
 DarlingServer::Server::Server(std::string prefix):
 	_prefix(prefix),
-	_socketPath(_prefix + ".darlingserver.sock"),
+	_socketPath(_prefix + "/.darlingserver.sock"),
 	_workQueue(std::bind(&Server::_worker, this, std::placeholders::_1))
 {
 	sharedInstancePointer = this;