Add skalibs/posixishard.h

 This will break things. It's a known issue. Patches to other
packages will come later, to adapt them to the new API.

 To work around brokenness, there needs to be *two* different
headers:
 1. one to be used before including system headers, that maximizes
visibility by enabling system-dependent feature test macros
(that will be tested by system headers)
 2. one to be used after including system headers, that performs
preprocessor tests and defines.

 skalibs/nonposix.h is the first one.
 Previously, there was no second one, and the tests were scattered
all over. There was a strnlen declaration in skalibs/posixplz.h
(which serves a totally different function: declaring things that
should be in POSIX, but *are not*, i.e. working around problems in
the standard, instead of problems in systems failing to respect
the standard), a build-time sysdep for error.h, #defines for
MSG_NOSIGNAL, etc. etc.
 skalibs/posixishard.h now is the second one, and centralizes
all the tests.

 As a result, the eproto sysdep is unnecessary and has been removed.
skalibs/error.h is now a static header, it is not built anymore.

39 files changed, 178 insertions, 141 deletions

diff --git a/.gitignore b/.gitignore
index 62cecdb..d71b7fc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,7 +4,6 @@
 /*.so.xyzzy
 /config.mak
 /src/include/skalibs/config.h
-/src/include/skalibs/error.h
 /src/include/skalibs/ip46.h
 /src/include/skalibs/sysdeps.h
 /src/include/skalibs/types.h
diff --git a/Makefile b/Makefile
index f40335b..8770d7a 100644
--- a/Makefile
+++ b/Makefile
@@ -48,7 +48,6 @@ src/include/$(package)/uint16.h \
 src/include/$(package)/uint32.h \
 src/include/$(package)/uint64.h \
 src/include/$(package)/types.h \
-src/include/$(package)/error.h \
 src/include/$(package)/ip46.h
 ALL_INCLUDES := $(sort $(BUILT_INCLUDES) $(wildcard src/include/$(package)/*.h))
 ALL_SYSDEPS := $(wildcard $(sysdeps)/*)
@@ -151,18 +150,6 @@ src/include/$(package)/uint64.h: $(sysdeps)/sysdeps src/headers/bits-header src/
 src/include/$(package)/types.h: src/include/$(package)/uint16.h src/include/$(package)/uint32.h src/include/$(package)/uint64.h $(sysdeps)/sysdeps src/headers/types-header src/headers/types-footer src/headers/unsigned-template src/headers/signed-template
 	exec tools/gen-types.sh $(sysdeps)/sysdeps $(TYPES) > $@
 
-src/include/$(package)/error.h: src/include/$(package)/gccattributes.h $(sysdeps)/sysdeps src/headers/error-addrinuse src/headers/error-already src/headers/error-proto src/headers/error-header src/headers/error-footer
-	@{ \
-	  cat src/headers/error-header ; \
-	  if grep -F target: $(sysdeps)/sysdeps | grep -qiF bsd ; then cat src/headers/error-addrinuse ; \
-	  else cat src/headers/error-already ; \
-	  fi ; \
-	  if grep -qF 'eproto: yes' $(sysdeps)/sysdeps ; then : ; \
-	  else cat src/headers/error-proto ; \
-	  fi ; \
-	  exec cat src/headers/error-footer ; \
-	} > $@
-
 src/include/$(package)/ip46.h: src/include/$(package)/fmtscan.h src/include/$(package)/socket.h $(sysdeps)/sysdeps src/headers/ip46-header src/headers/ip46-footer src/headers/ip46-with src/headers/ip46-without
 	@{ \
 	  cat src/headers/ip46-header ; \
diff --git a/configure b/configure
index 289caf2..984e77e 100755
--- a/configure
+++ b/configure
@@ -144,15 +144,16 @@ choose () {
     esac
   fi
   rm -f try$name.o try$name
+  echo "#undef ${package_macro_name}_HAS$macro" >> $sysdeps/sysdeps.h
   if $r ; then
     echo "$name: yes" >> $sysdeps/sysdeps
     echo "#define ${package_macro_name}_HAS$macro" >> $sysdeps/sysdeps.h
     echo "  ... yes"
   else
     echo "$name: no" >> $sysdeps/sysdeps
-    echo "#undef ${package_macro_name}_HAS$macro" >> $sysdeps/sysdeps.h
     echo "  ... no"
   fi
+  echo >> $sysdeps/sysdeps.h
 }
 
 trytypes () {
@@ -161,18 +162,21 @@ trytypes () {
   ./output-types >> $sysdeps/sysdeps
   ./output-types | grep -F sizeof | while read key value ; do
     caps=$(echo $key | sed s/:\$// | tr a-z A-Z)
-    echo "#define ${package_macro_name}_${caps} $value" >> $sysdeps/sysdeps.h
-  done
+    echo "#undef ${package_macro_name}_${caps}"
+    echo "#define ${package_macro_name}_${caps} $value"
+    echo
+  done >> $sysdeps/sysdeps.h
   ./output-types | grep -F signed | while read key value ; do
     caps=$(echo $key | sed s/:\$// | tr a-z A-Z)
+    echo "#undef ${package_macro_name}_HASUN${caps}"
+    echo "#undef ${package_macro_name}_HAS${caps}"
     if test $value = yes ; then
       echo "#define ${package_macro_name}_HAS${caps}"
-      echo "#undef ${package_macro_name}_HASUN${caps}"
     else
-      echo "#undef ${package_macro_name}_HAS${caps}"
       echo "#define ${package_macro_name}_HASUN${caps}"
-    fi >> $sysdeps/sysdeps.h
-  done
+    fi
+    echo
+  done >> $sysdeps/sysdeps.h
   rm -f output-types
   echo "  ... done"
 }
@@ -443,7 +447,14 @@ else
 #ifndef SYSDEPS_H
 #define SYSDEPS_H
 
+#undef SKALIBS_TARGET
 #define SKALIBS_TARGET "$target"
+
+#undef SKALIBS_BSD_SUCKS
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__bsdi__) || defined(__DragonFly__)
+# define SKALIBS_BSD_SUCKS
+#endif
+
 EOF
 
   exec 3>&1
@@ -462,43 +473,51 @@ EOF
   fi
   echo "$sysclock_lib" > $sysdeps/sysclock.lib
   echo "$tainnow_lib" > $sysdeps/tainnow.lib
+  echo "#undef ${package_macro_name}_HASCLOCKRT" >> $sysdeps/sysdeps.h
   if $hasclock ; then
     echo 'clockrt: yes' >> $sysdeps/sysdeps
     echo "#define ${package_macro_name}_HASCLOCKRT" >> $sysdeps/sysdeps.h
+    echo >> $sysdeps/sysdeps.h
     choose cl clockmon CLOCKMON CLOCK_MONOTONIC $sysclock_lib
   else
     echo 'clockrt: no' >> $sysdeps/sysdeps
-    echo "#undef ${package_macro_name}_HASCLOCKRT" >> $sysdeps/sysdeps.h
+    echo >> $sysdeps/sysdeps.h
   fi
 
   hasspawn=true
   spawn_lib=`trylibs posixspawn 'posix_spawn()' -lrt` || hasspawn=false
   echo "$spawn_lib" > $sysdeps/spawn.lib
+  echo "#undef ${package_macro_name}_HASPOSIXSPAWN" >> $sysdeps/sysdeps.h
   if $hasspawn ; then
     echo 'posixspawn: yes' >> $sysdeps/sysdeps
     echo "#define ${package_macro_name}_HASPOSIXSPAWN" >> $sysdeps/sysdeps.h
   else
     echo 'posixspawn: no' >> $sysdeps/sysdeps
-    echo "#undef ${package_macro_name}_HASPOSIXSPAWN" >> $sysdeps/sysdeps.h
   fi
+  echo >> $sysdeps/sysdeps.h
 
   hastimer=true
   timer_lib=`trylibs timer 'timer_create()' -lrt` || hastimer=false
   echo "$timer_lib" > $sysdeps/timer.lib
+  echo "#undef ${package_macro_name}_HASTIMER" >> $sysdeps/sysdeps.h
   if $hastimer ; then
     echo 'timer: yes' >> $sysdeps/sysdeps
     echo "#define ${package_macro_name}_HASTIMER" >> $sysdeps/sysdeps.h
   else
     echo 'timer: no' >> $sysdeps/sysdeps
-    echo "#undef ${package_macro_name}_HASTIMER" >> $sysdeps/sysdeps.h
   fi
+  echo >> $sysdeps/sysdeps.h
   exec 3>&-
 
   echo "Checking system endianness..."
   $CC_AUTO $CPPFLAGS_AUTO $CPPFLAGS $CPPFLAGS_POST $CFLAGS_AUTO $CFLAGS $CFLAGS_POST $LDFLAGS_AUTO $LDFLAGS $LDFLAGS_POST -o tryendianness src/sysdeps/tryendianness.c
   endianness=$(./tryendianness) || fail "$0: unable to determine endianness"
   echo "endianness: $endianness" >> $sysdeps/sysdeps
-  echo "#define ${package_macro_name}_ENDIANNESS \"$endianness\"" >> $sysdeps/sysdeps.h
+  {
+    echo "#undef ${package_macro_name}_ENDIANNESS"
+    echo "#define ${package_macro_name}_ENDIANNESS \"$endianness\""
+    echo
+  } >> $sysdeps/sysdeps.h
   echo "  ... $endianness"
   rm -f tryendianness
 
@@ -508,7 +527,6 @@ EOF
   choose c cmsgcloexec CMSGCLOEXEC 'MSG_CMSG_CLOEXEC'
   choose clr devurandom DEVURANDOM '/dev/urandom'
   choose cl dirfd DIRFD 'dirfd()'
-  choose c eproto EPROTO EPROTO
   choose cl eventfd EVENTFD 'eventfd()'
   choose cl flock FLOCK 'flock()'
   choose cl getpeereid GETPEEREID 'getpeereid()'
diff --git a/package/deps.mak b/package/deps.mak
index 98754bf..924fcb4 100644
--- a/package/deps.mak
+++ b/package/deps.mak
@@ -12,7 +12,7 @@ src/include/skalibs/biguint.h: src/include/skalibs/gccattributes.h
 src/include/skalibs/bitarray.h: src/include/skalibs/gccattributes.h
 src/include/skalibs/bufalloc.h: src/include/skalibs/gccattributes.h src/include/skalibs/stralloc.h
 src/include/skalibs/buffer.h: src/include/skalibs/allreadwrite.h src/include/skalibs/cbuffer.h src/include/skalibs/functypes.h src/include/skalibs/gccattributes.h
-src/include/skalibs/bytestr.h: src/include/skalibs/gccattributes.h src/include/skalibs/posixplz.h
+src/include/skalibs/bytestr.h: src/include/skalibs/gccattributes.h src/include/skalibs/posixishard.h
 src/include/skalibs/cbuffer.h: src/include/skalibs/gccattributes.h
 src/include/skalibs/cdb.h: src/include/skalibs/gccattributes.h
 src/include/skalibs/cdb_make.h: src/include/skalibs/allreadwrite.h src/include/skalibs/buffer.h src/include/skalibs/diuint32.h src/include/skalibs/genalloc.h
@@ -22,6 +22,7 @@ src/include/skalibs/djbunix.h: src/include/skalibs/envalloc.h src/include/skalib
 src/include/skalibs/env.h: src/include/skalibs/gccattributes.h src/include/skalibs/stralloc.h
 src/include/skalibs/envalloc.h: src/include/skalibs/genalloc.h
 src/include/skalibs/environ.h: src/include/skalibs/posixplz.h
+src/include/skalibs/error.h: src/include/skalibs/gccattributes.h src/include/skalibs/sysdeps.h
 src/include/skalibs/fmtscan.h: src/include/skalibs/gccattributes.h
 src/include/skalibs/genalloc.h: src/include/skalibs/functypes.h src/include/skalibs/stralloc.h
 src/include/skalibs/genqdyn.h: src/include/skalibs/stralloc.h
@@ -33,6 +34,7 @@ src/include/skalibs/iopause.h: src/include/skalibs/tai.h
 src/include/skalibs/kolbak.h: src/include/skalibs/unixmessage.h
 src/include/skalibs/lolstdio.h: src/include/skalibs/bufalloc.h src/include/skalibs/buffer.h src/include/skalibs/strerr2.h
 src/include/skalibs/netstring.h: src/include/skalibs/buffer.h src/include/skalibs/stralloc.h
+src/include/skalibs/posixishard.h: src/include/skalibs/gccattributes.h
 src/include/skalibs/posixplz.h: src/include/skalibs/functypes.h src/include/skalibs/gccattributes.h
 src/include/skalibs/random.h: src/include/skalibs/stralloc.h
 src/include/skalibs/setgroups.h: src/include/skalibs/sysdeps.h
@@ -44,7 +46,7 @@ src/include/skalibs/skalibs.h: src/include/skalibs/biguint.h src/include/skalibs
 src/include/skalibs/skamisc.h: src/include/skalibs/buffer.h src/include/skalibs/stralloc.h
 src/include/skalibs/socket.h: src/include/skalibs/djbunix.h src/include/skalibs/gccattributes.h src/include/skalibs/tai.h src/include/skalibs/webipc.h
 src/include/skalibs/stdcrypto.h: src/include/skalibs/md5.h src/include/skalibs/rc4.h src/include/skalibs/sha1.h src/include/skalibs/sha256.h src/include/skalibs/sha512.h
-src/include/skalibs/stddjb.h: src/include/skalibs/alarm.h src/include/skalibs/alloc.h src/include/skalibs/allreadwrite.h src/include/skalibs/bitarray.h src/include/skalibs/bufalloc.h src/include/skalibs/buffer.h src/include/skalibs/bytestr.h src/include/skalibs/cbuffer.h src/include/skalibs/cdb.h src/include/skalibs/cdb_make.h src/include/skalibs/config.h src/include/skalibs/direntry.h src/include/skalibs/disize.h src/include/skalibs/diuint.h src/include/skalibs/diuint32.h src/include/skalibs/djbtime.h src/include/skalibs/djbunix.h src/include/skalibs/env.h src/include/skalibs/envalloc.h src/include/skalibs/error.h src/include/skalibs/fmtscan.h src/include/skalibs/functypes.h src/include/skalibs/gccattributes.h src/include/skalibs/genalloc.h src/include/skalibs/genwrite.h src/include/skalibs/iobuffer.h src/include/skalibs/iopause.h src/include/skalibs/ip46.h src/include/skalibs/lolstdio.h src/include/skalibs/netstring.h src/include/skalibs/nsig.h src/include/skalibs/segfault.h src/include/skalibs/selfpipe.h src/include/skalibs/setgroups.h src/include/skalibs/sgetopt.h src/include/skalibs/sig.h src/include/skalibs/siovec.h src/include/skalibs/skamisc.h src/include/skalibs/socket.h src/include/skalibs/stralloc.h src/include/skalibs/strerr.h src/include/skalibs/strerr2.h src/include/skalibs/tai.h src/include/skalibs/types.h src/include/skalibs/uint16.h src/include/skalibs/uint32.h src/include/skalibs/uint64.h src/include/skalibs/webipc.h
+src/include/skalibs/stddjb.h: src/include/skalibs/alarm.h src/include/skalibs/alloc.h src/include/skalibs/allreadwrite.h src/include/skalibs/bitarray.h src/include/skalibs/bufalloc.h src/include/skalibs/buffer.h src/include/skalibs/bytestr.h src/include/skalibs/cbuffer.h src/include/skalibs/cdb.h src/include/skalibs/cdb_make.h src/include/skalibs/direntry.h src/include/skalibs/disize.h src/include/skalibs/diuint.h src/include/skalibs/diuint32.h src/include/skalibs/djbtime.h src/include/skalibs/djbunix.h src/include/skalibs/env.h src/include/skalibs/envalloc.h src/include/skalibs/error.h src/include/skalibs/fmtscan.h src/include/skalibs/functypes.h src/include/skalibs/gccattributes.h src/include/skalibs/genalloc.h src/include/skalibs/genwrite.h src/include/skalibs/iobuffer.h src/include/skalibs/iopause.h src/include/skalibs/ip46.h src/include/skalibs/lolstdio.h src/include/skalibs/netstring.h src/include/skalibs/nsig.h src/include/skalibs/segfault.h src/include/skalibs/selfpipe.h src/include/skalibs/setgroups.h src/include/skalibs/sgetopt.h src/include/skalibs/sig.h src/include/skalibs/siovec.h src/include/skalibs/skamisc.h src/include/skalibs/socket.h src/include/skalibs/stralloc.h src/include/skalibs/strerr.h src/include/skalibs/strerr2.h src/include/skalibs/tai.h src/include/skalibs/types.h src/include/skalibs/uint16.h src/include/skalibs/uint32.h src/include/skalibs/uint64.h src/include/skalibs/webipc.h
 src/include/skalibs/strerr.h: src/include/skalibs/gccattributes.h
 src/include/skalibs/strerr2.h: src/include/skalibs/strerr.h
 src/include/skalibs/tai.h: src/include/skalibs/gccattributes.h src/include/skalibs/uint64.h
@@ -152,7 +154,7 @@ src/libposixplz/mklinktemp.o src/libposixplz/mklinktemp.lo: src/libposixplz/mkli
 src/libposixplz/mkltemp.o src/libposixplz/mkltemp.lo: src/libposixplz/mkltemp.c src/include/skalibs/posixplz.h
 src/libposixplz/mkptemp.o src/libposixplz/mkptemp.lo: src/libposixplz/mkptemp.c src/include/skalibs/djbunix.h src/include/skalibs/posixplz.h
 src/libposixplz/setgroups.o src/libposixplz/setgroups.lo: src/libposixplz/setgroups.c src/include/skalibs/nonposix.h src/include/skalibs/setgroups.h src/include/skalibs/sysdeps.h
-src/libposixplz/strnlen.o src/libposixplz/strnlen.lo: src/libposixplz/strnlen.c src/include/skalibs/bytestr.h src/include/skalibs/posixplz.h src/include/skalibs/sysdeps.h
+src/libposixplz/strnlen.o src/libposixplz/strnlen.lo: src/libposixplz/strnlen.c src/include/skalibs/bytestr.h src/include/skalibs/posixishard.h src/include/skalibs/sysdeps.h
 src/libposixplz/touch.o src/libposixplz/touch.lo: src/libposixplz/touch.c src/include/skalibs/djbunix.h src/include/skalibs/nonposix.h src/include/skalibs/posixplz.h src/include/skalibs/sysdeps.h
 src/libposixplz/unlink_void.o src/libposixplz/unlink_void.lo: src/libposixplz/unlink_void.c src/include/skalibs/posixplz.h
 src/librandom/autosurf.o src/librandom/autosurf.lo: src/librandom/autosurf.c src/include/skalibs/random.h src/include/skalibs/surf.h
@@ -283,7 +285,7 @@ src/libstddjb/cdb_init_map.o src/libstddjb/cdb_init_map.lo: src/libstddjb/cdb_in
 src/libstddjb/cdb_make.o src/libstddjb/cdb_make.lo: src/libstddjb/cdb_make.c src/include/skalibs/buffer.h src/include/skalibs/cdb.h src/include/skalibs/cdb_make.h src/include/skalibs/diuint32.h src/include/skalibs/genalloc.h src/include/skalibs/uint32.h
 src/libstddjb/cdb_mapfile.o src/libstddjb/cdb_mapfile.lo: src/libstddjb/cdb_mapfile.c src/include/skalibs/cdb.h src/include/skalibs/djbunix.h
 src/libstddjb/cdb_nextkey.o src/libstddjb/cdb_nextkey.lo: src/libstddjb/cdb_nextkey.c src/include/skalibs/cdb.h src/include/skalibs/uint32.h
-src/libstddjb/cdb_read.o src/libstddjb/cdb_read.lo: src/libstddjb/cdb_read.c src/include/skalibs/allreadwrite.h src/include/skalibs/cdb.h src/include/skalibs/error.h
+src/libstddjb/cdb_read.o src/libstddjb/cdb_read.lo: src/libstddjb/cdb_read.c src/include/skalibs/allreadwrite.h src/include/skalibs/cdb.h src/include/skalibs/posixishard.h
 src/libstddjb/cdb_successor.o src/libstddjb/cdb_successor.lo: src/libstddjb/cdb_successor.c src/include/skalibs/cdb.h
 src/libstddjb/cdb_zero.o src/libstddjb/cdb_zero.lo: src/libstddjb/cdb_zero.c src/include/skalibs/cdb.h
 src/libstddjb/child_spawn.o src/libstddjb/child_spawn.lo: src/libstddjb/child_spawn.c src/include/skalibs/allreadwrite.h src/include/skalibs/config.h src/include/skalibs/djbunix.h src/include/skalibs/env.h src/include/skalibs/sig.h src/include/skalibs/strerr2.h src/include/skalibs/sysdeps.h src/include/skalibs/types.h
@@ -393,16 +395,16 @@ src/libstddjb/ip6_fmt.o src/libstddjb/ip6_fmt.lo: src/libstddjb/ip6_fmt.c src/in
 src/libstddjb/ip6_scan.o src/libstddjb/ip6_scan.lo: src/libstddjb/ip6_scan.c src/include/skalibs/fmtscan.h src/include/skalibs/uint16.h
 src/libstddjb/ip6_scanlist.o src/libstddjb/ip6_scanlist.lo: src/libstddjb/ip6_scanlist.c src/include/skalibs/fmtscan.h
 src/libstddjb/ipc_accept.o src/libstddjb/ipc_accept.lo: src/libstddjb/ipc_accept.c src/include/skalibs/bytestr.h src/include/skalibs/djbunix.h src/include/skalibs/nonposix.h src/include/skalibs/sysdeps.h src/include/skalibs/webipc.h
-src/libstddjb/ipc_bind.o src/libstddjb/ipc_bind.lo: src/libstddjb/ipc_bind.c src/include/skalibs/error.h src/include/skalibs/nonposix.h src/include/skalibs/webipc.h
+src/libstddjb/ipc_bind.o src/libstddjb/ipc_bind.lo: src/libstddjb/ipc_bind.c src/include/skalibs/nonposix.h src/include/skalibs/posixishard.h src/include/skalibs/webipc.h
 src/libstddjb/ipc_bind_reuse.o src/libstddjb/ipc_bind_reuse.lo: src/libstddjb/ipc_bind_reuse.c src/include/skalibs/nonposix.h src/include/skalibs/webipc.h
-src/libstddjb/ipc_connect.o src/libstddjb/ipc_connect.lo: src/libstddjb/ipc_connect.c src/include/skalibs/error.h src/include/skalibs/nonposix.h src/include/skalibs/webipc.h
+src/libstddjb/ipc_connect.o src/libstddjb/ipc_connect.lo: src/libstddjb/ipc_connect.c src/include/skalibs/nonposix.h src/include/skalibs/posixishard.h src/include/skalibs/webipc.h
 src/libstddjb/ipc_connected.o src/libstddjb/ipc_connected.lo: src/libstddjb/ipc_connected.c src/include/skalibs/allreadwrite.h src/include/skalibs/nonposix.h src/include/skalibs/webipc.h
 src/libstddjb/ipc_dgram.o src/libstddjb/ipc_dgram.lo: src/libstddjb/ipc_dgram.c src/include/skalibs/djbunix.h src/include/skalibs/nonposix.h src/include/skalibs/webipc.h
 src/libstddjb/ipc_listen.o src/libstddjb/ipc_listen.lo: src/libstddjb/ipc_listen.c src/include/skalibs/nonposix.h src/include/skalibs/webipc.h
 src/libstddjb/ipc_local.o src/libstddjb/ipc_local.lo: src/libstddjb/ipc_local.c src/include/skalibs/bytestr.h src/include/skalibs/nonposix.h src/include/skalibs/webipc.h
 src/libstddjb/ipc_pair.o src/libstddjb/ipc_pair.lo: src/libstddjb/ipc_pair.c src/include/skalibs/djbunix.h src/include/skalibs/nonposix.h src/include/skalibs/webipc.h
-src/libstddjb/ipc_recv.o src/libstddjb/ipc_recv.lo: src/libstddjb/ipc_recv.c src/include/skalibs/error.h src/include/skalibs/nonposix.h src/include/skalibs/webipc.h
-src/libstddjb/ipc_send.o src/libstddjb/ipc_send.lo: src/libstddjb/ipc_send.c src/include/skalibs/error.h src/include/skalibs/nonposix.h src/include/skalibs/webipc.h
+src/libstddjb/ipc_recv.o src/libstddjb/ipc_recv.lo: src/libstddjb/ipc_recv.c src/include/skalibs/nonposix.h src/include/skalibs/posixishard.h src/include/skalibs/webipc.h
+src/libstddjb/ipc_send.o src/libstddjb/ipc_send.lo: src/libstddjb/ipc_send.c src/include/skalibs/nonposix.h src/include/skalibs/posixishard.h src/include/skalibs/webipc.h
 src/libstddjb/ipc_stream.o src/libstddjb/ipc_stream.lo: src/libstddjb/ipc_stream.c src/include/skalibs/djbunix.h src/include/skalibs/nonposix.h src/include/skalibs/webipc.h
 src/libstddjb/ipc_timed_connect.o src/libstddjb/ipc_timed_connect.lo: src/libstddjb/ipc_timed_connect.c src/include/skalibs/error.h src/include/skalibs/iopause.h src/include/skalibs/webipc.h
 src/libstddjb/leapsecs_add.o src/libstddjb/leapsecs_add.lo: src/libstddjb/leapsecs_add.c src/libstddjb/djbtime-internal.h src/include/skalibs/uint64.h
@@ -435,7 +437,7 @@ src/libstddjb/netstring_append.o src/libstddjb/netstring_append.lo: src/libstddj
 src/libstddjb/netstring_appendv.o src/libstddjb/netstring_appendv.lo: src/libstddjb/netstring_appendv.c src/include/skalibs/bytestr.h src/include/skalibs/netstring.h src/include/skalibs/siovec.h src/include/skalibs/stralloc.h src/include/skalibs/uint64.h
 src/libstddjb/netstring_decode.o src/libstddjb/netstring_decode.lo: src/libstddjb/netstring_decode.c src/include/skalibs/netstring.h src/include/skalibs/stralloc.h src/include/skalibs/uint64.h
 src/libstddjb/netstring_encode.o src/libstddjb/netstring_encode.lo: src/libstddjb/netstring_encode.c src/include/skalibs/netstring.h src/include/skalibs/stralloc.h src/include/skalibs/uint64.h
-src/libstddjb/netstring_get.o src/libstddjb/netstring_get.lo: src/libstddjb/netstring_get.c src/include/skalibs/allreadwrite.h src/include/skalibs/buffer.h src/include/skalibs/bytestr.h src/include/skalibs/error.h src/include/skalibs/netstring.h src/include/skalibs/stralloc.h src/include/skalibs/types.h
+src/libstddjb/netstring_get.o src/libstddjb/netstring_get.lo: src/libstddjb/netstring_get.c src/include/skalibs/allreadwrite.h src/include/skalibs/buffer.h src/include/skalibs/bytestr.h src/include/skalibs/netstring.h src/include/skalibs/posixishard.h src/include/skalibs/stralloc.h src/include/skalibs/types.h
 src/libstddjb/netstring_put.o src/libstddjb/netstring_put.lo: src/libstddjb/netstring_put.c src/include/skalibs/buffer.h src/include/skalibs/netstring.h src/include/skalibs/uint64.h
 src/libstddjb/ntp_from_tain.o src/libstddjb/ntp_from_tain.lo: src/libstddjb/ntp_from_tain.c src/include/skalibs/djbtime.h src/include/skalibs/tai.h src/include/skalibs/uint64.h
 src/libstddjb/open2.o src/libstddjb/open2.lo: src/libstddjb/open2.c src/include/skalibs/nonposix.h
@@ -586,7 +588,7 @@ src/libstddjb/string_quote_nodelim.o src/libstddjb/string_quote_nodelim.lo: src/
 src/libstddjb/string_quote_nodelim_mustquote.o src/libstddjb/string_quote_nodelim_mustquote.lo: src/libstddjb/string_quote_nodelim_mustquote.c src/include/skalibs/fmtscan.h src/include/skalibs/skamisc.h src/include/skalibs/stralloc.h
 src/libstddjb/string_unquote.o src/libstddjb/string_unquote.lo: src/libstddjb/string_unquote.c src/include/skalibs/skamisc.h
 src/libstddjb/string_unquote_nodelim.o src/libstddjb/string_unquote_nodelim.lo: src/libstddjb/string_unquote_nodelim.c src/include/skalibs/skamisc.h
-src/libstddjb/string_unquote_withdelim.o src/libstddjb/string_unquote_withdelim.lo: src/libstddjb/string_unquote_withdelim.c src/include/skalibs/bytestr.h src/include/skalibs/error.h src/include/skalibs/fmtscan.h src/include/skalibs/skamisc.h
+src/libstddjb/string_unquote_withdelim.o src/libstddjb/string_unquote_withdelim.lo: src/libstddjb/string_unquote_withdelim.c src/include/skalibs/bytestr.h src/include/skalibs/fmtscan.h src/include/skalibs/posixishard.h src/include/skalibs/skamisc.h
 src/libstddjb/strn_fmt.o src/libstddjb/strn_fmt.lo: src/libstddjb/strn_fmt.c src/include/skalibs/fmtscan.h src/include/skalibs/types.h
 src/libstddjb/subgetopt.o src/libstddjb/subgetopt.lo: src/libstddjb/subgetopt.c src/include/skalibs/sgetopt.h
 src/libstddjb/subgetopt_here.o src/libstddjb/subgetopt_here.lo: src/libstddjb/subgetopt_here.c src/include/skalibs/sgetopt.h
@@ -737,8 +739,8 @@ src/libunixonacid/dd_commit_devino.o src/libunixonacid/dd_commit_devino.lo: src/
 src/libunixonacid/dd_open_read.o src/libunixonacid/dd_open_read.lo: src/libunixonacid/dd_open_read.c src/include/skalibs/djbunix.h src/include/skalibs/unix-transactional.h
 src/libunixonacid/dd_open_write.o src/libunixonacid/dd_open_write.lo: src/libunixonacid/dd_open_write.c src/include/skalibs/djbunix.h src/include/skalibs/random.h src/include/skalibs/stralloc.h src/include/skalibs/unix-transactional.h
 src/libunixonacid/ipc_timed_recv.o src/libunixonacid/ipc_timed_recv.lo: src/libunixonacid/ipc_timed_recv.c src/include/skalibs/allreadwrite.h src/include/skalibs/functypes.h src/include/skalibs/unix-timed.h src/include/skalibs/webipc.h
-src/libunixonacid/ipc_timed_send.o src/libunixonacid/ipc_timed_send.lo: src/libunixonacid/ipc_timed_send.c src/include/skalibs/error.h src/include/skalibs/iopause.h src/include/skalibs/nonposix.h src/include/skalibs/unix-timed.h
-src/libunixonacid/ipc_timed_sendv.o src/libunixonacid/ipc_timed_sendv.lo: src/libunixonacid/ipc_timed_sendv.c src/include/skalibs/error.h src/include/skalibs/iopause.h src/include/skalibs/nonposix.h src/include/skalibs/siovec.h src/include/skalibs/unix-timed.h
+src/libunixonacid/ipc_timed_send.o src/libunixonacid/ipc_timed_send.lo: src/libunixonacid/ipc_timed_send.c src/include/skalibs/error.h src/include/skalibs/iopause.h src/include/skalibs/nonposix.h src/include/skalibs/posixishard.h src/include/skalibs/unix-timed.h
+src/libunixonacid/ipc_timed_sendv.o src/libunixonacid/ipc_timed_sendv.lo: src/libunixonacid/ipc_timed_sendv.c src/include/skalibs/error.h src/include/skalibs/iopause.h src/include/skalibs/nonposix.h src/include/skalibs/posixishard.h src/include/skalibs/siovec.h src/include/skalibs/unix-timed.h
 src/libunixonacid/kolbak_call.o src/libunixonacid/kolbak_call.lo: src/libunixonacid/kolbak_call.c src/include/skalibs/kolbak.h src/include/skalibs/unixmessage.h
 src/libunixonacid/kolbak_enqueue.o src/libunixonacid/kolbak_enqueue.lo: src/libunixonacid/kolbak_enqueue.c src/include/skalibs/kolbak.h src/include/skalibs/unixmessage.h
 src/libunixonacid/kolbak_queue_init.o src/libunixonacid/kolbak_queue_init.lo: src/libunixonacid/kolbak_queue_init.c src/include/skalibs/kolbak.h
@@ -760,7 +762,7 @@ src/libunixonacid/openreadnclose_at.o src/libunixonacid/openreadnclose_at.lo: sr
 src/libunixonacid/openslurpclose_at.o src/libunixonacid/openslurpclose_at.lo: src/libunixonacid/openslurpclose_at.c src/include/skalibs/djbunix.h src/include/skalibs/unix-transactional.h
 src/libunixonacid/openwritenclose_at.o src/libunixonacid/openwritenclose_at.lo: src/libunixonacid/openwritenclose_at.c src/include/skalibs/allreadwrite.h src/include/skalibs/djbunix.h src/include/skalibs/unix-transactional.h
 src/libunixonacid/openwritevnclose_at.o src/libunixonacid/openwritevnclose_at.lo: src/libunixonacid/openwritevnclose_at.c src/include/skalibs/allreadwrite.h src/include/skalibs/djbunix.h src/include/skalibs/siovec.h src/include/skalibs/unix-transactional.h
-src/libunixonacid/skaclient_default_cb.o src/libunixonacid/skaclient_default_cb.lo: src/libunixonacid/skaclient_default_cb.c src/include/skalibs/error.h src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h
+src/libunixonacid/skaclient_default_cb.o src/libunixonacid/skaclient_default_cb.lo: src/libunixonacid/skaclient_default_cb.c src/include/skalibs/posixishard.h src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h
 src/libunixonacid/skaclient_end.o src/libunixonacid/skaclient_end.lo: src/libunixonacid/skaclient_end.c src/include/skalibs/djbunix.h src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h
 src/libunixonacid/skaclient_init.o src/libunixonacid/skaclient_init.lo: src/libunixonacid/skaclient_init.c src/libunixonacid/skaclient-internal.h src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h
 src/libunixonacid/skaclient_put.o src/libunixonacid/skaclient_put.lo: src/libunixonacid/skaclient_put.c src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h
@@ -771,25 +773,25 @@ src/libunixonacid/skaclient_send.o src/libunixonacid/skaclient_send.lo: src/libu
 src/libunixonacid/skaclient_sendmsg.o src/libunixonacid/skaclient_sendmsg.lo: src/libunixonacid/skaclient_sendmsg.c src/include/skalibs/skaclient.h
 src/libunixonacid/skaclient_sendmsgv.o src/libunixonacid/skaclient_sendmsgv.lo: src/libunixonacid/skaclient_sendmsgv.c src/include/skalibs/skaclient.h
 src/libunixonacid/skaclient_sendv.o src/libunixonacid/skaclient_sendv.lo: src/libunixonacid/skaclient_sendv.c src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h
-src/libunixonacid/skaclient_server_ack.o src/libunixonacid/skaclient_server_ack.lo: src/libunixonacid/skaclient_server_ack.c src/include/skalibs/djbunix.h src/include/skalibs/error.h src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h src/include/skalibs/webipc.h
+src/libunixonacid/skaclient_server_ack.o src/libunixonacid/skaclient_server_ack.lo: src/libunixonacid/skaclient_server_ack.c src/include/skalibs/djbunix.h src/include/skalibs/posixishard.h src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h src/include/skalibs/webipc.h
 src/libunixonacid/skaclient_server_bidi_ack.o src/libunixonacid/skaclient_server_bidi_ack.lo: src/libunixonacid/skaclient_server_bidi_ack.c src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h
 src/libunixonacid/skaclient_server_init.o src/libunixonacid/skaclient_server_init.lo: src/libunixonacid/skaclient_server_init.c src/include/skalibs/allreadwrite.h src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h
 src/libunixonacid/skaclient_start.o src/libunixonacid/skaclient_start.lo: src/libunixonacid/skaclient_start.c src/include/skalibs/kolbak.h src/libunixonacid/skaclient-internal.h src/include/skalibs/skaclient.h
 src/libunixonacid/skaclient_start_async.o src/libunixonacid/skaclient_start_async.lo: src/libunixonacid/skaclient_start_async.c src/include/skalibs/error.h src/include/skalibs/kolbak.h src/libunixonacid/skaclient-internal.h src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h src/include/skalibs/webipc.h
-src/libunixonacid/skaclient_start_cb.o src/libunixonacid/skaclient_start_cb.lo: src/libunixonacid/skaclient_start_cb.c src/include/skalibs/error.h src/libunixonacid/skaclient-internal.h src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h
+src/libunixonacid/skaclient_start_cb.o src/libunixonacid/skaclient_start_cb.lo: src/libunixonacid/skaclient_start_cb.c src/include/skalibs/posixishard.h src/libunixonacid/skaclient-internal.h src/include/skalibs/skaclient.h src/include/skalibs/unixmessage.h
 src/libunixonacid/skaclient_startf.o src/libunixonacid/skaclient_startf.lo: src/libunixonacid/skaclient_startf.c src/include/skalibs/kolbak.h src/libunixonacid/skaclient-internal.h src/include/skalibs/skaclient.h
 src/libunixonacid/skaclient_startf_async.o src/libunixonacid/skaclient_startf_async.lo: src/libunixonacid/skaclient_startf_async.c src/include/skalibs/djbunix.h src/include/skalibs/kolbak.h src/libunixonacid/skaclient-internal.h src/include/skalibs/skaclient.h
 src/libunixonacid/skaclient_syncify.o src/libunixonacid/skaclient_syncify.lo: src/libunixonacid/skaclient_syncify.c src/include/skalibs/skaclient.h
 src/libunixonacid/skaclient_zero.o src/libunixonacid/skaclient_zero.lo: src/libunixonacid/skaclient_zero.c src/include/skalibs/skaclient.h
 src/libunixonacid/stat_at.o src/libunixonacid/stat_at.lo: src/libunixonacid/stat_at.c src/include/skalibs/djbunix.h src/include/skalibs/nonposix.h src/include/skalibs/sysdeps.h src/include/skalibs/unix-transactional.h
-src/libunixonacid/textclient_command.o src/libunixonacid/textclient_command.lo: src/libunixonacid/textclient_command.c src/include/skalibs/error.h src/include/skalibs/textclient.h
-src/libunixonacid/textclient_commandv.o src/libunixonacid/textclient_commandv.lo: src/libunixonacid/textclient_commandv.c src/include/skalibs/error.h src/include/skalibs/textclient.h
+src/libunixonacid/textclient_command.o src/libunixonacid/textclient_command.lo: src/libunixonacid/textclient_command.c src/include/skalibs/posixishard.h src/include/skalibs/textclient.h
+src/libunixonacid/textclient_commandv.o src/libunixonacid/textclient_commandv.lo: src/libunixonacid/textclient_commandv.c src/include/skalibs/posixishard.h src/include/skalibs/textclient.h
 src/libunixonacid/textclient_end.o src/libunixonacid/textclient_end.lo: src/libunixonacid/textclient_end.c src/include/skalibs/djbunix.h src/include/skalibs/textclient.h src/include/skalibs/textmessage.h
 src/libunixonacid/textclient_server_init.o src/libunixonacid/textclient_server_init.lo: src/libunixonacid/textclient_server_init.c src/include/skalibs/djbunix.h src/include/skalibs/textclient.h
-src/libunixonacid/textclient_server_init_frompipe.o src/libunixonacid/textclient_server_init_frompipe.lo: src/libunixonacid/textclient_server_init_frompipe.c src/include/skalibs/allreadwrite.h src/include/skalibs/djbunix.h src/include/skalibs/error.h src/include/skalibs/textclient.h src/include/skalibs/textmessage.h src/include/skalibs/types.h
-src/libunixonacid/textclient_server_init_fromsocket.o src/libunixonacid/textclient_server_init_fromsocket.lo: src/libunixonacid/textclient_server_init_fromsocket.c src/include/skalibs/allreadwrite.h src/include/skalibs/djbunix.h src/include/skalibs/error.h src/include/skalibs/nonposix.h src/include/skalibs/textclient.h src/include/skalibs/textmessage.h src/include/skalibs/types.h src/include/skalibs/unix-timed.h
-src/libunixonacid/textclient_start.o src/libunixonacid/textclient_start.lo: src/libunixonacid/textclient_start.c src/include/skalibs/allreadwrite.h src/include/skalibs/djbunix.h src/include/skalibs/error.h src/include/skalibs/nonposix.h src/include/skalibs/sysdeps.h src/include/skalibs/textclient.h src/include/skalibs/textmessage.h src/include/skalibs/unix-timed.h src/include/skalibs/webipc.h
-src/libunixonacid/textclient_startf.o src/libunixonacid/textclient_startf.lo: src/libunixonacid/textclient_startf.c src/include/skalibs/allreadwrite.h src/include/skalibs/djbunix.h src/include/skalibs/error.h src/include/skalibs/textclient.h src/include/skalibs/textmessage.h
+src/libunixonacid/textclient_server_init_frompipe.o src/libunixonacid/textclient_server_init_frompipe.lo: src/libunixonacid/textclient_server_init_frompipe.c src/include/skalibs/allreadwrite.h src/include/skalibs/djbunix.h src/include/skalibs/posixishard.h src/include/skalibs/textclient.h src/include/skalibs/textmessage.h src/include/skalibs/types.h
+src/libunixonacid/textclient_server_init_fromsocket.o src/libunixonacid/textclient_server_init_fromsocket.lo: src/libunixonacid/textclient_server_init_fromsocket.c src/include/skalibs/allreadwrite.h src/include/skalibs/djbunix.h src/include/skalibs/nonposix.h src/include/skalibs/posixishard.h src/include/skalibs/textclient.h src/include/skalibs/textmessage.h src/include/skalibs/types.h src/include/skalibs/unix-timed.h
+src/libunixonacid/textclient_start.o src/libunixonacid/textclient_start.lo: src/libunixonacid/textclient_start.c src/include/skalibs/allreadwrite.h src/include/skalibs/djbunix.h src/include/skalibs/nonposix.h src/include/skalibs/posixishard.h src/include/skalibs/sysdeps.h src/include/skalibs/textclient.h src/include/skalibs/textmessage.h src/include/skalibs/unix-timed.h src/include/skalibs/webipc.h
+src/libunixonacid/textclient_startf.o src/libunixonacid/textclient_startf.lo: src/libunixonacid/textclient_startf.c src/include/skalibs/allreadwrite.h src/include/skalibs/djbunix.h src/include/skalibs/posixishard.h src/include/skalibs/textclient.h src/include/skalibs/textmessage.h
 src/libunixonacid/textclient_zero.o src/libunixonacid/textclient_zero.lo: src/libunixonacid/textclient_zero.c src/include/skalibs/textclient.h
 src/libunixonacid/textmessage_handle.o src/libunixonacid/textmessage_handle.lo: src/libunixonacid/textmessage_handle.c src/include/skalibs/textmessage.h
 src/libunixonacid/textmessage_put.o src/libunixonacid/textmessage_put.lo: src/libunixonacid/textmessage_put.c src/include/skalibs/bufalloc.h src/include/skalibs/textmessage.h src/include/skalibs/uint32.h
@@ -820,15 +822,15 @@ src/libunixonacid/unixmessage_bits_closeall.o src/libunixonacid/unixmessage_bits
 src/libunixonacid/unixmessage_bits_closenone.o src/libunixonacid/unixmessage_bits_closenone.lo: src/libunixonacid/unixmessage_bits_closenone.c src/include/skalibs/bitarray.h src/include/skalibs/unixmessage.h
 src/libunixonacid/unixmessage_drop.o src/libunixonacid/unixmessage_drop.lo: src/libunixonacid/unixmessage_drop.c src/include/skalibs/djbunix.h src/include/skalibs/unixmessage.h
 src/libunixonacid/unixmessage_handle.o src/libunixonacid/unixmessage_handle.lo: src/libunixonacid/unixmessage_handle.c src/include/skalibs/unixmessage.h
-src/libunixonacid/unixmessage_put.o src/libunixonacid/unixmessage_put.lo: src/libunixonacid/unixmessage_put.c src/include/skalibs/bitarray.h src/include/skalibs/disize.h src/include/skalibs/error.h src/include/skalibs/genalloc.h src/include/skalibs/siovec.h src/include/skalibs/stralloc.h src/include/skalibs/unixmessage.h
-src/libunixonacid/unixmessage_receive.o src/libunixonacid/unixmessage_receive.lo: src/libunixonacid/unixmessage_receive.c src/include/skalibs/allreadwrite.h src/include/skalibs/cbuffer.h src/include/skalibs/djbunix.h src/include/skalibs/error.h src/include/skalibs/nonposix.h src/include/skalibs/stralloc.h src/include/skalibs/sysdeps.h src/include/skalibs/uint16.h src/include/skalibs/uint32.h src/include/skalibs/unixmessage.h
+src/libunixonacid/unixmessage_put.o src/libunixonacid/unixmessage_put.lo: src/libunixonacid/unixmessage_put.c src/include/skalibs/bitarray.h src/include/skalibs/disize.h src/include/skalibs/genalloc.h src/include/skalibs/posixishard.h src/include/skalibs/siovec.h src/include/skalibs/stralloc.h src/include/skalibs/unixmessage.h
+src/libunixonacid/unixmessage_receive.o src/libunixonacid/unixmessage_receive.lo: src/libunixonacid/unixmessage_receive.c src/include/skalibs/allreadwrite.h src/include/skalibs/cbuffer.h src/include/skalibs/djbunix.h src/include/skalibs/nonposix.h src/include/skalibs/posixishard.h src/include/skalibs/stralloc.h src/include/skalibs/sysdeps.h src/include/skalibs/uint16.h src/include/skalibs/uint32.h src/include/skalibs/unixmessage.h
 src/libunixonacid/unixmessage_receiver_0.o src/libunixonacid/unixmessage_receiver_0.lo: src/libunixonacid/unixmessage_receiver_0.c src/include/skalibs/unixmessage.h
 src/libunixonacid/unixmessage_receiver_free.o src/libunixonacid/unixmessage_receiver_free.lo: src/libunixonacid/unixmessage_receiver_free.c src/include/skalibs/cbuffer.h src/include/skalibs/djbunix.h src/include/skalibs/stralloc.h src/include/skalibs/unixmessage.h
 src/libunixonacid/unixmessage_receiver_hasmsginbuf.o src/libunixonacid/unixmessage_receiver_hasmsginbuf.lo: src/libunixonacid/unixmessage_receiver_hasmsginbuf.c src/include/skalibs/cbuffer.h src/include/skalibs/siovec.h src/include/skalibs/uint32.h src/include/skalibs/unixmessage.h
 src/libunixonacid/unixmessage_receiver_init.o src/libunixonacid/unixmessage_receiver_init.lo: src/libunixonacid/unixmessage_receiver_init.c src/include/skalibs/cbuffer.h src/include/skalibs/stralloc.h src/include/skalibs/unixmessage.h
 src/libunixonacid/unixmessage_sender_1.o src/libunixonacid/unixmessage_sender_1.lo: src/libunixonacid/unixmessage_sender_1.c src/include/skalibs/unixmessage.h
 src/libunixonacid/unixmessage_sender_closecb.o src/libunixonacid/unixmessage_sender_closecb.lo: src/libunixonacid/unixmessage_sender_closecb.c src/include/skalibs/djbunix.h src/include/skalibs/unixmessage.h
-src/libunixonacid/unixmessage_sender_flush.o src/libunixonacid/unixmessage_sender_flush.lo: src/libunixonacid/unixmessage_sender_flush.c src/include/skalibs/allreadwrite.h src/include/skalibs/disize.h src/include/skalibs/djbunix.h src/include/skalibs/genalloc.h src/include/skalibs/nonposix.h src/include/skalibs/uint16.h src/include/skalibs/uint32.h src/include/skalibs/unixmessage.h
+src/libunixonacid/unixmessage_sender_flush.o src/libunixonacid/unixmessage_sender_flush.lo: src/libunixonacid/unixmessage_sender_flush.c src/include/skalibs/allreadwrite.h src/include/skalibs/disize.h src/include/skalibs/djbunix.h src/include/skalibs/genalloc.h src/include/skalibs/nonposix.h src/include/skalibs/posixishard.h src/include/skalibs/uint16.h src/include/skalibs/uint32.h src/include/skalibs/unixmessage.h
 src/libunixonacid/unixmessage_sender_free.o src/libunixonacid/unixmessage_sender_free.lo: src/libunixonacid/unixmessage_sender_free.c src/include/skalibs/disize.h src/include/skalibs/djbunix.h src/include/skalibs/genalloc.h src/include/skalibs/stralloc.h src/include/skalibs/unixmessage.h
 src/libunixonacid/unixmessage_sender_getfd.o src/libunixonacid/unixmessage_sender_getfd.lo: src/libunixonacid/unixmessage_sender_getfd.c src/include/skalibs/unixmessage.h
 src/libunixonacid/unixmessage_sender_init.o src/libunixonacid/unixmessage_sender_init.lo: src/libunixonacid/unixmessage_sender_init.c src/include/skalibs/unixmessage.h
diff --git a/src/headers/error-addrinuse b/src/headers/error-addrinuse
deleted file mode 100644
index 6f1e4fe..0000000
--- a/src/headers/error-addrinuse
+++ /dev/null
@@ -1,3 +0,0 @@
-
-/* BSD sucks */
-#define error_isalready(e) (((e) == EALREADY) || ((e) == EINPROGRESS) || ((e) == EADDRINUSE))
diff --git a/src/headers/error-already b/src/headers/error-already
deleted file mode 100644
index ac6b8a7..0000000
--- a/src/headers/error-already
+++ /dev/null
@@ -1 +0,0 @@
-#define error_isalready(e) (((e) == EALREADY) || ((e) == EINPROGRESS))
diff --git a/src/headers/error-footer b/src/headers/error-footer
deleted file mode 100644
index ddd5dae..0000000
--- a/src/headers/error-footer
+++ /dev/null
@@ -1,2 +0,0 @@
-
-#endif
diff --git a/src/headers/error-header b/src/headers/error-header
deleted file mode 100644
index f9913e5..0000000
--- a/src/headers/error-header
+++ /dev/null
@@ -1,9 +0,0 @@
-/* ISC license. */
-
-#ifndef ERROR_H
-#define ERROR_H
-
-#include <skalibs/gccattributes.h>
-
-extern int error_temp (int) gccattr_const ;
-#define error_isagain(e) (((e) == EAGAIN) || ((e) == EWOULDBLOCK))
diff --git a/src/headers/error-proto b/src/headers/error-proto
deleted file mode 100644
index fd0c01d..0000000
--- a/src/headers/error-proto
+++ /dev/null
@@ -1,3 +0,0 @@
-
-/* Did I ever mention that BSD sucks ? */
-#define EPROTO EPROTOTYPE
diff --git a/src/include/skalibs/bytestr.h b/src/include/skalibs/bytestr.h
index b20a34d..a0dc027 100644
--- a/src/include/skalibs/bytestr.h
+++ b/src/include/skalibs/bytestr.h
@@ -10,7 +10,7 @@
 
 #include <string.h>
 #include <strings.h>
-#include <skalibs/posixplz.h>
+#include <skalibs/posixishard.h>
 
 #define byte_copy(to, n, from) memmove(to, (from), n)
 #define byte_copyr(to, n, from) memmove(to, (from), n)
diff --git a/src/include/skalibs/error.h b/src/include/skalibs/error.h
new file mode 100644
index 0000000..353e879
--- /dev/null
+++ b/src/include/skalibs/error.h
@@ -0,0 +1,18 @@
+/* ISC license. */
+
+#ifndef ERROR_H
+#define ERROR_H
+
+#include <skalibs/sysdeps.h>
+#include <skalibs/gccattributes.h>
+
+extern int error_temp (int) gccattr_const ;
+#define error_isagain(e) (((e) == EAGAIN) || ((e) == EWOULDBLOCK))
+
+#ifdef SKALIBS_BSD_SUCKS
+# define error_isalready(e) (((e) == EALREADY) || ((e) == EINPROGRESS) || ((e) == EADDRINUSE))
+#else
+# define error_isalready(e) (((e) == EALREADY) || ((e) == EINPROGRESS))
+#endif
+
+#endif
diff --git a/src/include/skalibs/nonposix.h b/src/include/skalibs/nonposix.h
index 4ce165c..cf87674 100644
--- a/src/include/skalibs/nonposix.h
+++ b/src/include/skalibs/nonposix.h
@@ -35,12 +35,25 @@
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif
+
+
+ /* BSD and Linux libcs that are not glibc: _BSD_SOURCE opens up a
+    lot of extensions. Of course, glibc insisted on changing to a
+    different macro, because coordination and consistency would make
+    developers' life too easy. */
+
+#ifdef __GLIBC__
 #ifndef _DEFAULT_SOURCE
 #define _DEFAULT_SOURCE
 #endif
+#else
+#ifndef _BSD_SOURCE
+#define _BSD_SOURCE
+#endif
+#endif
 
 
- /* NetBSD: of course they had to have their own macros. */
+ /* NetBSD: of course they had to have their own macro too. */
 
 #ifndef _NETBSD_SOURCE
 #define _NETBSD_SOURCE
@@ -50,22 +63,13 @@
 #endif
 
 
- /* MacOS: needs this for full SUSv3 conformance. Don't ask. */
+ /* MacOS: needs this for full SUSv3 conformance. Standards are hard. */
 
 #ifndef _DARWIN_C_SOURCE
 #define _DARWIN_C_SOURCE
 #endif
 
 
- /* Unfortunately we can't fully avoid #ifdef forests,
-    because the BSDs are bloody snowflakes. See: setgroups(). */
-
-#undef SKALIBS_BSD_SUCKS
-#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__bsdi__) || defined(__DragonFly__)
-# define SKALIBS_BSD_SUCKS
-#endif
-
-
  /* old versions of BSD and some broken GNU toolchains:
       system headers are not self-contained,
       starting with sys/types.h normally always works. */
diff --git a/src/include/skalibs/posixishard.h b/src/include/skalibs/posixishard.h
new file mode 100644
index 0000000..b5da077
--- /dev/null
+++ b/src/include/skalibs/posixishard.h
@@ -0,0 +1,30 @@
+/* ISC license. */
+
+#ifndef SKALIBS_POSIXISHARD_H
+#define SKALIBS_POSIXISHARD_H
+
+#include <stddef.h>
+
+#include <skalibs/gccattributes.h>
+
+ /*
+    This header must be used with some broken OSes who have
+    serious trouble implementing even easy parts of POSIX.
+    It's supposed to be included *after* system headers, so
+    it won't catch behaviour such as "this macro must be defined
+    prior to including system headers in order to define that
+    symbol". If that's what you need, include skalibs/nonposix.h
+    instead, which must happen *before* system headers.
+ */
+
+extern size_t strnlen (char const *, size_t) gccattr_pure ;
+
+#ifndef EPROTO
+#define EPROTO EPROTOTYPE
+#endif
+
+#ifndef MSG_NOSIGNAL
+#define MSG_NOSIGNAL 0
+#endif
+
+#endif
diff --git a/src/include/skalibs/posixplz.h b/src/include/skalibs/posixplz.h
index dda66ee..639a7c4 100644
--- a/src/include/skalibs/posixplz.h
+++ b/src/include/skalibs/posixplz.h
@@ -18,17 +18,6 @@ extern char **environ ;
 
 
  /*
-    Stuff that _is_ POSIX, but some OSes still don't have it.
-    openat() et al. should be here, but they're impossible to
-    emulate correctly, and I don't want an app using openat()
-    to think it has safe POSIX semantics when it doesn't :/
-    EPROTO et al. should be here, but ugh ifdef forests.
- */
-
-extern size_t strnlen (char const *, size_t) gccattr_pure ;
-
-
- /*
     Non-POSIX functions that some OSes provide and others don't.
     setgroups() isn't included because it's its own kind of broken.
  */
diff --git a/src/include/skalibs/skalibs.h b/src/include/skalibs/skalibs.h
index 2924e1c..ceaad27 100644
--- a/src/include/skalibs/skalibs.h
+++ b/src/include/skalibs/skalibs.h
@@ -4,8 +4,11 @@
 #define SKALIBS_H
 
 /*
-   This header includes everything in skalibs except skalibs/config.h
-   It's heavy!
+   This header is heavy! It includes everything in skalibs except:
+   - skalibs/config.h: package configuration
+   - skalibs/sysdeps.h: system-dependent feature test macros
+   - skalibs/nonposix.h: pre-system headers definitions for POSIX extensions
+   - skalibs/posixishard.h: workarounds for failures to respect POSIX
 */
 
 #include <skalibs/posixplz.h>
diff --git a/src/include/skalibs/stddjb.h b/src/include/skalibs/stddjb.h
index aa90f6a..232b5f3 100644
--- a/src/include/skalibs/stddjb.h
+++ b/src/include/skalibs/stddjb.h
@@ -3,7 +3,6 @@
 #ifndef STDDJB_H
 #define STDDJB_H
 
-#include <skalibs/config.h>
 #include <skalibs/uint16.h>
 #include <skalibs/uint32.h>
 #include <skalibs/uint64.h>
diff --git a/src/libposixplz/strnlen.c b/src/libposixplz/strnlen.c
index 1699771..1c4145c 100644
--- a/src/libposixplz/strnlen.c
+++ b/src/libposixplz/strnlen.c
@@ -6,7 +6,7 @@
 
 #include <string.h>
 #include <skalibs/bytestr.h>
-#include <skalibs/posixplz.h>
+#include <skalibs/posixishard.h>
 
 size_t strnlen (char const *s, size_t max)
 {
diff --git a/src/libstddjb/cdb_read.c b/src/libstddjb/cdb_read.c
index fa7b1d3..85e8dea 100644
--- a/src/libstddjb/cdb_read.c
+++ b/src/libstddjb/cdb_read.c
@@ -3,7 +3,8 @@
 #include <unistd.h>
 #include <string.h>
 #include <errno.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/allreadwrite.h>
 #include <skalibs/cdb.h>
 
diff --git a/src/libstddjb/ipc_bind.c b/src/libstddjb/ipc_bind.c
index 8686591..b3388d7 100644
--- a/src/libstddjb/ipc_bind.c
+++ b/src/libstddjb/ipc_bind.c
@@ -1,11 +1,13 @@
 /* ISC license. */
 
 #include <skalibs/nonposix.h>
+
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <string.h>
 #include <errno.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/webipc.h>
 
 int ipc_bind (int s, char const *p)
diff --git a/src/libstddjb/ipc_connect.c b/src/libstddjb/ipc_connect.c
index 9aa4dd9..bb0422e 100644
--- a/src/libstddjb/ipc_connect.c
+++ b/src/libstddjb/ipc_connect.c
@@ -1,11 +1,13 @@
 /* ISC license. */
 
 #include <skalibs/nonposix.h>
+
 #include <errno.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <string.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/webipc.h>
 
 int ipc_connect (int s, char const *p)
diff --git a/src/libstddjb/ipc_recv.c b/src/libstddjb/ipc_recv.c
index 5aa1c2b..e15e3c5 100644
--- a/src/libstddjb/ipc_recv.c
+++ b/src/libstddjb/ipc_recv.c
@@ -1,11 +1,13 @@
 /* ISC license. */
 
 #include <skalibs/nonposix.h>
+
 #include <errno.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <string.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/webipc.h>
 
 ssize_t ipc_recv (int fd, char *s, size_t len, char *path)
diff --git a/src/libstddjb/ipc_send.c b/src/libstddjb/ipc_send.c
index 967a64f..65826a6 100644
--- a/src/libstddjb/ipc_send.c
+++ b/src/libstddjb/ipc_send.c
@@ -1,11 +1,13 @@
 /* ISC license. */
 
 #include <skalibs/nonposix.h>
+
 #include <errno.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <string.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/webipc.h>
 
 ssize_t ipc_send (int fd, char const *s, size_t len, char const *path)
diff --git a/src/libstddjb/netstring_get.c b/src/libstddjb/netstring_get.c
index 9756b2e..0dfa907 100644
--- a/src/libstddjb/netstring_get.c
+++ b/src/libstddjb/netstring_get.c
@@ -1,11 +1,12 @@
 /* ISC license. */
 
 #include <errno.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/types.h>
 #include <skalibs/allreadwrite.h>
 #include <skalibs/bytestr.h>
 #include <skalibs/buffer.h>
-#include <skalibs/error.h>
 #include <skalibs/stralloc.h>
 #include <skalibs/netstring.h>
 
diff --git a/src/libstddjb/string_unquote_withdelim.c b/src/libstddjb/string_unquote_withdelim.c
index 3ebd07d..702d3a5 100644
--- a/src/libstddjb/string_unquote_withdelim.c
+++ b/src/libstddjb/string_unquote_withdelim.c
@@ -1,7 +1,8 @@
 /* ISC license. */
 
 #include <errno.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/bytestr.h>
 #include <skalibs/fmtscan.h>
 #include <skalibs/skamisc.h>
diff --git a/src/libunixonacid/ipc_timed_send.c b/src/libunixonacid/ipc_timed_send.c
index eeae453..e1e75a4 100644
--- a/src/libunixonacid/ipc_timed_send.c
+++ b/src/libunixonacid/ipc_timed_send.c
@@ -1,17 +1,15 @@
 /* ISC license. */
 
 #include <skalibs/nonposix.h>
+
 #include <sys/socket.h>
 #include <errno.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/error.h>
 #include <skalibs/iopause.h>
 #include <skalibs/unix-timed.h>
 
- /* For MacOS, that still doesn't know what POSIX says */
-#ifndef MSG_NOSIGNAL
-#define MSG_NOSIGNAL 0
-#endif
-
 int ipc_timed_send (int fd, char const *s, size_t len, tain_t const *deadline, tain_t *stamp)
 {
   iopause_fd x = { .fd = fd, .events = IOPAUSE_WRITE, .revents = 0 } ;
diff --git a/src/libunixonacid/ipc_timed_sendv.c b/src/libunixonacid/ipc_timed_sendv.c
index 220b2e3..0fe5b1e 100644
--- a/src/libunixonacid/ipc_timed_sendv.c
+++ b/src/libunixonacid/ipc_timed_sendv.c
@@ -1,18 +1,16 @@
 /* ISC license. */
 
 #include <skalibs/nonposix.h>
+
 #include <sys/socket.h>
 #include <errno.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/error.h>
 #include <skalibs/iopause.h>
 #include <skalibs/siovec.h>
 #include <skalibs/unix-timed.h>
 
- /* For MacOS, that still doesn't know what POSIX says */
-#ifndef MSG_NOSIGNAL
-#define MSG_NOSIGNAL 0
-#endif
-
 int ipc_timed_sendv (int fd, struct iovec const *v, unsigned int n, tain_t const *deadline, tain_t *stamp)
 {
   struct msghdr hdr =
diff --git a/src/libunixonacid/skaclient_default_cb.c b/src/libunixonacid/skaclient_default_cb.c
index 10934e5..5bf0268 100644
--- a/src/libunixonacid/skaclient_default_cb.c
+++ b/src/libunixonacid/skaclient_default_cb.c
@@ -1,7 +1,8 @@
 /* ISC license. */
 
 #include <errno.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/skaclient.h>
 #include <skalibs/unixmessage.h>
 
diff --git a/src/libunixonacid/skaclient_server_ack.c b/src/libunixonacid/skaclient_server_ack.c
index 715e128..b55eb07 100644
--- a/src/libunixonacid/skaclient_server_ack.c
+++ b/src/libunixonacid/skaclient_server_ack.c
@@ -2,8 +2,9 @@
 
 #include <errno.h>
 #include <string.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/djbunix.h>
-#include <skalibs/error.h>
 #include <skalibs/skaclient.h>
 #include <skalibs/unixmessage.h>
 #include <skalibs/webipc.h>
diff --git a/src/libunixonacid/skaclient_start_cb.c b/src/libunixonacid/skaclient_start_cb.c
index 80cb6c3..0c4ef49 100644
--- a/src/libunixonacid/skaclient_start_cb.c
+++ b/src/libunixonacid/skaclient_start_cb.c
@@ -2,7 +2,8 @@
 
 #include <errno.h>
 #include <string.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/unixmessage.h>
 #include <skalibs/skaclient.h>
 #include "skaclient-internal.h"
diff --git a/src/libunixonacid/textclient_command.c b/src/libunixonacid/textclient_command.c
index 2e72a4c..56c7122 100644
--- a/src/libunixonacid/textclient_command.c
+++ b/src/libunixonacid/textclient_command.c
@@ -2,7 +2,8 @@
 
 #include <sys/uio.h>
 #include <errno.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/textclient.h>
 
 int textclient_command (textclient_t *a, char const *s, size_t len, tain_t const *deadline, tain_t *stamp)
diff --git a/src/libunixonacid/textclient_commandv.c b/src/libunixonacid/textclient_commandv.c
index 5bcd411..ec61498 100644
--- a/src/libunixonacid/textclient_commandv.c
+++ b/src/libunixonacid/textclient_commandv.c
@@ -2,7 +2,8 @@
 
 #include <sys/uio.h>
 #include <errno.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/textclient.h>
 
 int textclient_commandv (textclient_t *a, struct iovec const *v, unsigned int n, tain_t const *deadline, tain_t *stamp)
diff --git a/src/libunixonacid/textclient_server_init_frompipe.c b/src/libunixonacid/textclient_server_init_frompipe.c
index fb85b44..e606eeb 100644
--- a/src/libunixonacid/textclient_server_init_frompipe.c
+++ b/src/libunixonacid/textclient_server_init_frompipe.c
@@ -4,8 +4,9 @@
 #include <stdlib.h>
 #include <fcntl.h>
 #include <errno.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/types.h>
-#include <skalibs/error.h>
 #include <skalibs/allreadwrite.h>
 #include <skalibs/djbunix.h>
 #include <skalibs/textmessage.h>
diff --git a/src/libunixonacid/textclient_server_init_fromsocket.c b/src/libunixonacid/textclient_server_init_fromsocket.c
index e58df2b..b7f4e84 100644
--- a/src/libunixonacid/textclient_server_init_fromsocket.c
+++ b/src/libunixonacid/textclient_server_init_fromsocket.c
@@ -1,22 +1,20 @@
 /* ISC license. */
 
 #include <skalibs/nonposix.h>
+
 #include <sys/uio.h>
 #include <errno.h>
 #include <string.h>
 #include <sys/socket.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/types.h>
-#include <skalibs/error.h>
 #include <skalibs/allreadwrite.h>
 #include <skalibs/djbunix.h>
 #include <skalibs/unix-timed.h>
 #include <skalibs/textmessage.h>
 #include <skalibs/textclient.h>
 
-#ifndef MSG_NOSIGNAL
-#define MSG_NOSIGNAL 0
-#endif
-
 union aligner_u
 {
   struct cmsghdr cmsghdr ;
diff --git a/src/libunixonacid/textclient_start.c b/src/libunixonacid/textclient_start.c
index 8cb7bcd..8eb8b13 100644
--- a/src/libunixonacid/textclient_start.c
+++ b/src/libunixonacid/textclient_start.c
@@ -2,11 +2,13 @@
 
 #include <skalibs/sysdeps.h>
 #include <skalibs/nonposix.h>
+
 #include <sys/uio.h>
 #include <string.h>
 #include <errno.h>
 #include <sys/socket.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/allreadwrite.h>
 #include <skalibs/webipc.h>
 #include <skalibs/djbunix.h>
diff --git a/src/libunixonacid/textclient_startf.c b/src/libunixonacid/textclient_startf.c
index 6a6f0fc..12c2b20 100644
--- a/src/libunixonacid/textclient_startf.c
+++ b/src/libunixonacid/textclient_startf.c
@@ -3,7 +3,8 @@
 #include <sys/uio.h>
 #include <string.h>
 #include <errno.h>
-#include <skalibs/error.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/allreadwrite.h>
 #include <skalibs/djbunix.h>
 #include <skalibs/textmessage.h>
diff --git a/src/libunixonacid/unixmessage_put.c b/src/libunixonacid/unixmessage_put.c
index a8701ee..a2ac302 100644
--- a/src/libunixonacid/unixmessage_put.c
+++ b/src/libunixonacid/unixmessage_put.c
@@ -2,9 +2,10 @@
 
 #include <string.h>
 #include <errno.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/bitarray.h>
 #include <skalibs/disize.h>
-#include <skalibs/error.h>
 #include <skalibs/stralloc.h>
 #include <skalibs/genalloc.h>
 #include <skalibs/siovec.h>
diff --git a/src/libunixonacid/unixmessage_receive.c b/src/libunixonacid/unixmessage_receive.c
index 15d08ae..811baae 100644
--- a/src/libunixonacid/unixmessage_receive.c
+++ b/src/libunixonacid/unixmessage_receive.c
@@ -2,14 +2,16 @@
 
 #include <skalibs/sysdeps.h>
 #include <skalibs/nonposix.h>
+
 #include <errno.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/uint16.h>
 #include <skalibs/uint32.h>
 #include <skalibs/cbuffer.h>
 #include <skalibs/djbunix.h>
-#include <skalibs/error.h>
 #include <skalibs/allreadwrite.h>
 #include <skalibs/stralloc.h>
 #include <skalibs/unixmessage.h>
diff --git a/src/libunixonacid/unixmessage_sender_flush.c b/src/libunixonacid/unixmessage_sender_flush.c
index fa1438f..3f096f0 100644
--- a/src/libunixonacid/unixmessage_sender_flush.c
+++ b/src/libunixonacid/unixmessage_sender_flush.c
@@ -1,12 +1,15 @@
 /* ISC license. */
 
 #include <skalibs/nonposix.h>
+
 #include <sys/socket.h>
 #include <sys/uio.h>
 #include <string.h>
 #include <stdint.h>
 #include <unistd.h>
 #include <errno.h>
+
+#include <skalibs/posixishard.h>
 #include <skalibs/uint16.h>
 #include <skalibs/uint32.h>
 #include <skalibs/disize.h>
@@ -15,11 +18,6 @@
 #include <skalibs/djbunix.h>
 #include <skalibs/unixmessage.h>
 
- /* MacOS X tries hard to be POSIX-compliant... and fails. */
-#ifndef MSG_NOSIGNAL
-#define MSG_NOSIGNAL 0
-#endif
-
 union aligner_u
 {
   struct cmsghdr cmsghdr ;
diff --git a/src/sysdeps/tryeproto.c b/src/sysdeps/tryeproto.c
deleted file mode 100644
index e7a0942..0000000
--- a/src/sysdeps/tryeproto.c
+++ /dev/null
@@ -1,9 +0,0 @@
-/* ISC license. */
-
-#include <errno.h>
-
-static int dummy ;
-
-#ifndef EPROTO
-  syntax error !
-#endif