diff --git a/basis/environment/unix/unix.factor b/basis/environment/unix/unix.factor
index 3fc8c2f79b..ec41e919d8 100644
--- a/basis/environment/unix/unix.factor
+++ b/basis/environment/unix/unix.factor
@@ -3,7 +3,7 @@
 USING: alien alien.c-types alien.data alien.strings
 alien.syntax kernel layouts sequences system unix
 environment io.encodings.utf8 unix.utilities vocabs.loader
-combinators alien.accessors ;
+combinators alien.accessors unix.ffi ;
 IN: environment.unix
 
 HOOK: environ os ( -- void* )
diff --git a/basis/io/backend/unix/unix.factor b/basis/io/backend/unix/unix.factor
index 2ab5bdca05..6412132725 100644
--- a/basis/io/backend/unix/unix.factor
+++ b/basis/io/backend/unix/unix.factor
@@ -2,7 +2,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: alien alien.c-types alien.syntax generic assocs kernel
 kernel.private math io.ports sequences strings sbufs threads
-unix vectors io.buffers io.backend io.encodings math.parser
+unix unix.ffi vectors io.buffers io.backend io.encodings math.parser
 continuations system libc namespaces make io.timeouts
 io.encodings.utf8 destructors destructors.private accessors
 summary combinators locals unix.time unix.types fry
diff --git a/basis/io/directories/unix/unix.factor b/basis/io/directories/unix/unix.factor
index b1f6596759..a62a431de8 100644
--- a/basis/io/directories/unix/unix.factor
+++ b/basis/io/directories/unix/unix.factor
@@ -4,7 +4,7 @@ USING: accessors alien.c-types alien.strings combinators
 continuations destructors fry io io.backend io.backend.unix
 io.directories io.encodings.binary io.encodings.utf8 io.files
 io.pathnames io.files.types kernel math.bitwise sequences system
-unix unix.stat vocabs.loader classes.struct ;
+unix unix.stat vocabs.loader classes.struct unix.ffi ;
 IN: io.directories.unix
 
 : touch-mode ( -- n )
diff --git a/basis/io/files/info/info.factor b/basis/io/files/info/info.factor
index 60a9308f38..500fd62cd3 100644
--- a/basis/io/files/info/info.factor
+++ b/basis/io/files/info/info.factor
@@ -26,7 +26,7 @@ available-space free-space used-space total-space ;
 HOOK: file-system-info os ( path -- file-system-info )
 
 {
-    { [ os unix? ] [ "io.files.info.unix." os name>> append ] }
+    { [ os unix? ] [ "io.files.info" ] }
     { [ os windows? ] [ "io.files.info.windows" ] }
 } cond require
 
diff --git a/basis/io/files/info/unix/unix.factor b/basis/io/files/info/unix/unix.factor
index 180f194c89..ff604759c1 100644
--- a/basis/io/files/info/unix/unix.factor
+++ b/basis/io/files/info/unix/unix.factor
@@ -1,13 +1,13 @@
 ! Copyright (C) 2008 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: accessors kernel system math math.bitwise strings arrays
-sequences combinators combinators.short-circuit alien.c-types
-vocabs.loader calendar calendar.unix io.files.info
-io.files.types io.backend io.directories unix unix.stat
-unix.time unix.users unix.groups classes.struct
-specialized-arrays literals ;
-SPECIALIZED-ARRAY: timeval
+USING: accessors alien.c-types arrays calendar calendar.unix
+classes.struct combinators combinators.short-circuit io.backend
+io.directories io.files.info io.files.types kernel literals
+math math.bitwise sequences specialized-arrays strings system
+unix unix.ffi unix.groups unix.stat unix.time unix.users
+vocabs.loader ;
 IN: io.files.info.unix
+SPECIALIZED-ARRAY: timeval
 
 TUPLE: unix-file-system-info < file-system-info
 block-size preferred-block-size
@@ -286,3 +286,5 @@ PRIVATE>
         { +regular-file+ [ file-type>executable ] }
         [ drop file-type>executable ]
     } case ;
+
+"io.files.info.unix." os name>> append require
diff --git a/basis/io/files/links/unix/unix.factor b/basis/io/files/links/unix/unix.factor
index ced4c11c59..f97478c332 100644
--- a/basis/io/files/links/unix/unix.factor
+++ b/basis/io/files/links/unix/unix.factor
@@ -1,7 +1,7 @@
 ! Copyright (C) 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: io.backend io.files.links system unix io.pathnames kernel
-io.files sequences ;
+USING: io.backend io.files io.files.links io.pathnames kernel
+sequences system unix unix.ffi ;
 IN: io.files.links.unix
 
 M: unix make-link ( path1 path2 -- )
diff --git a/basis/io/files/unix/unix.factor b/basis/io/files/unix/unix.factor
index 783e40a70c..7293cf67fa 100644
--- a/basis/io/files/unix/unix.factor
+++ b/basis/io/files/unix/unix.factor
@@ -2,7 +2,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: unix byte-arrays kernel io.backend.unix math.bitwise
 io.ports io.files io.files.private io.pathnames environment
-destructors system ;
+destructors system unix.ffi ;
 IN: io.files.unix
 
 M: unix cwd ( -- path )
diff --git a/basis/io/launcher/unix/unix.factor b/basis/io/launcher/unix/unix.factor
index a9e3324986..28c805a528 100644
--- a/basis/io/launcher/unix/unix.factor
+++ b/basis/io/launcher/unix/unix.factor
@@ -5,7 +5,7 @@ continuations environment io io.backend io.backend.unix
 io.files io.files.private io.files.unix io.launcher
 io.launcher.unix.parser io.pathnames io.ports kernel math
 namespaces sequences strings system threads unix
-unix.process ;
+unix.process unix.ffi ;
 IN: io.launcher.unix
 
 : get-arguments ( process -- seq )
diff --git a/basis/io/pipes/unix/unix.factor b/basis/io/pipes/unix/unix.factor
index 8493f14d26..7dbeb0a589 100644
--- a/basis/io/pipes/unix/unix.factor
+++ b/basis/io/pipes/unix/unix.factor
@@ -1,7 +1,7 @@
 ! Copyright (C) 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: alien.c-types system kernel unix math sequences
-io.backend.unix io.ports specialized-arrays accessors ;
+io.backend.unix io.ports specialized-arrays accessors unix.ffi ;
 QUALIFIED: io.pipes
 SPECIALIZED-ARRAY: int
 IN: io.pipes.unix
diff --git a/basis/io/sockets/secure/unix/unix.factor b/basis/io/sockets/secure/unix/unix.factor
index b04d282530..8fe9facc0c 100644
--- a/basis/io/sockets/secure/unix/unix.factor
+++ b/basis/io/sockets/secure/unix/unix.factor
@@ -6,7 +6,8 @@ alien.strings libc continuations destructors openssl
 openssl.libcrypto openssl.libssl io io.files io.ports
 io.backend.unix io.sockets.unix io.encodings.ascii io.buffers
 io.sockets io.sockets.private io.sockets.secure
-io.sockets.secure.openssl io.timeouts system summary fry ;
+io.sockets.secure.openssl io.timeouts system summary fry
+unix.ffi ;
 FROM: io.ports => shutdown ;
 IN: io.sockets.secure.unix
 
diff --git a/basis/io/sockets/sockets.factor b/basis/io/sockets/sockets.factor
index e45224fcc2..af21dac9b7 100644
--- a/basis/io/sockets/sockets.factor
+++ b/basis/io/sockets/sockets.factor
@@ -11,7 +11,7 @@ IN: io.sockets
 
 << {
     { [ os windows? ] [ "windows.winsock" ] }
-    { [ os unix? ] [ "unix" ] }
+    { [ os unix? ] [ "unix.ffi" ] }
 } cond use-vocab >>
 
 ! Addressing
diff --git a/basis/io/sockets/unix/unix.factor b/basis/io/sockets/unix/unix.factor
index 4f25435985..fcf84f7925 100644
--- a/basis/io/sockets/unix/unix.factor
+++ b/basis/io/sockets/unix/unix.factor
@@ -5,7 +5,7 @@ threads sequences byte-arrays io.binary io.backend.unix
 io.streams.duplex io.backend io.pathnames io.sockets.private
 io.files.private io.encodings.utf8 math.parser continuations
 libc combinators system accessors destructors unix locals init
-classes.struct alien.data ;
+classes.struct alien.data unix.ffi ;
 
 EXCLUDE: namespaces => bind ;
 EXCLUDE: io => read write ;
diff --git a/basis/unix/debugger/debugger.factor b/basis/unix/debugger/debugger.factor
index 4e276373e1..7a085731d1 100644
--- a/basis/unix/debugger/debugger.factor
+++ b/basis/unix/debugger/debugger.factor
@@ -1,7 +1,6 @@
-! Copyright (C) 2008 Slava Pestov.
+! Copyright (C) 2009 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: debugger prettyprint accessors unix kernel ;
-FROM: io => write print nl ;
+USING: accessors debugger io kernel prettyprint unix ;
 IN: unix.debugger
 
 M: unix-error error.
diff --git a/basis/unix/ffi/authors.txt b/basis/unix/ffi/authors.txt
new file mode 100644
index 0000000000..b4bd0e7b35
--- /dev/null
+++ b/basis/unix/ffi/authors.txt
@@ -0,0 +1 @@
+Doug Coleman
\ No newline at end of file
diff --git a/basis/unix/bsd/authors.txt b/basis/unix/ffi/bsd/authors.txt
similarity index 100%
rename from basis/unix/bsd/authors.txt
rename to basis/unix/ffi/bsd/authors.txt
diff --git a/basis/unix/bsd/bsd.factor b/basis/unix/ffi/bsd/bsd.factor
similarity index 89%
rename from basis/unix/bsd/bsd.factor
rename to basis/unix/ffi/bsd/bsd.factor
index 0825e42930..bda99422fc 100644
--- a/basis/unix/bsd/bsd.factor
+++ b/basis/unix/ffi/bsd/bsd.factor
@@ -2,7 +2,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: alien.c-types alien.syntax classes.struct combinators
 system unix.types vocabs.loader ;
-IN: unix
+IN: unix.ffi
 
 CONSTANT: MAXPATHLEN 1024
 
@@ -85,8 +85,8 @@ CONSTANT: SEEK_CUR 1
 CONSTANT: SEEK_END 2
 
 os {
-    { macosx  [ "unix.bsd.macosx"  require ] }
-    { freebsd [ "unix.bsd.freebsd" require ] }
-    { openbsd [ "unix.bsd.openbsd" require ] }
-    { netbsd  [ "unix.bsd.netbsd"  require ] }
+    { macosx  [ "unix.ffi.bsd.macosx"  require ] }
+    { freebsd [ "unix.ffi.bsd.freebsd" require ] }
+    { openbsd [ "unix.ffi.bsd.openbsd" require ] }
+    { netbsd  [ "unix.ffi.bsd.netbsd"  require ] }
 } case
diff --git a/basis/unix/bsd/freebsd/freebsd.factor b/basis/unix/ffi/bsd/freebsd/freebsd.factor
similarity index 99%
rename from basis/unix/bsd/freebsd/freebsd.factor
rename to basis/unix/ffi/bsd/freebsd/freebsd.factor
index e6a2070520..992d1c3ad0 100644
--- a/basis/unix/bsd/freebsd/freebsd.factor
+++ b/basis/unix/ffi/bsd/freebsd/freebsd.factor
@@ -1,5 +1,5 @@
 USING: alien.c-types alien.syntax classes.struct unix.types ;
-IN: unix
+IN: unix.ffi
 
 CONSTANT: FD_SETSIZE 1024
 
diff --git a/basis/unix/bsd/freebsd/tags.txt b/basis/unix/ffi/bsd/freebsd/tags.txt
similarity index 100%
rename from basis/unix/bsd/freebsd/tags.txt
rename to basis/unix/ffi/bsd/freebsd/tags.txt
diff --git a/basis/unix/bsd/macosx/macosx.factor b/basis/unix/ffi/bsd/macosx/macosx.factor
similarity index 95%
rename from basis/unix/bsd/macosx/macosx.factor
rename to basis/unix/ffi/bsd/macosx/macosx.factor
index c263be7056..a2e75b6ca6 100644
--- a/basis/unix/bsd/macosx/macosx.factor
+++ b/basis/unix/ffi/bsd/macosx/macosx.factor
@@ -1,6 +1,7 @@
-USING: alien.c-types alien.syntax unix.time unix.types
-unix.types.macosx classes.struct ;
-IN: unix
+USING: alien alien.c-types alien.libraries alien.syntax
+classes.struct combinators kernel system unix unix.time
+unix.types vocabs vocabs.loader ;
+IN: unix.ffi
 
 CONSTANT: FD_SETSIZE 1024
 
diff --git a/basis/unix/bsd/macosx/tags.txt b/basis/unix/ffi/bsd/macosx/tags.txt
similarity index 100%
rename from basis/unix/bsd/macosx/tags.txt
rename to basis/unix/ffi/bsd/macosx/tags.txt
diff --git a/basis/unix/bsd/netbsd/netbsd.factor b/basis/unix/ffi/bsd/netbsd/netbsd.factor
similarity index 98%
rename from basis/unix/bsd/netbsd/netbsd.factor
rename to basis/unix/ffi/bsd/netbsd/netbsd.factor
index 6bef08abe3..0aee585b48 100644
--- a/basis/unix/bsd/netbsd/netbsd.factor
+++ b/basis/unix/ffi/bsd/netbsd/netbsd.factor
@@ -1,6 +1,6 @@
 USING: alien.syntax alien.c-types math vocabs.loader
 classes.struct unix.types ;
-IN: unix
+IN: unix.ffi
 
 CONSTANT: FD_SETSIZE 256
 
@@ -138,4 +138,4 @@ CONSTANT: _SS_MAXSIZE 128
 : _SS_PAD2SIZE ( -- n )
     _SS_MAXSIZE 2 - _SS_PAD1SIZE - _SS_ALIGNSIZE - ; inline
 
-"unix.bsd.netbsd.structs" require
+"unix.ffi.bsd.netbsd.structs" require
diff --git a/basis/unix/bsd/netbsd/structs/structs.factor b/basis/unix/ffi/bsd/netbsd/structs/structs.factor
similarity index 100%
rename from basis/unix/bsd/netbsd/structs/structs.factor
rename to basis/unix/ffi/bsd/netbsd/structs/structs.factor
diff --git a/basis/unix/bsd/netbsd/structs/tags.txt b/basis/unix/ffi/bsd/netbsd/structs/tags.txt
similarity index 100%
rename from basis/unix/bsd/netbsd/structs/tags.txt
rename to basis/unix/ffi/bsd/netbsd/structs/tags.txt
diff --git a/basis/unix/bsd/netbsd/tags.txt b/basis/unix/ffi/bsd/netbsd/tags.txt
similarity index 100%
rename from basis/unix/bsd/netbsd/tags.txt
rename to basis/unix/ffi/bsd/netbsd/tags.txt
diff --git a/basis/unix/bsd/openbsd/openbsd.factor b/basis/unix/ffi/bsd/openbsd/openbsd.factor
similarity index 99%
rename from basis/unix/bsd/openbsd/openbsd.factor
rename to basis/unix/ffi/bsd/openbsd/openbsd.factor
index f48b7c1ac4..076dbdfd24 100644
--- a/basis/unix/bsd/openbsd/openbsd.factor
+++ b/basis/unix/ffi/bsd/openbsd/openbsd.factor
@@ -1,5 +1,5 @@
 USING: alien.c-types alien.syntax classes.struct unix.types ;
-IN: unix
+IN: unix.ffi
 
 CONSTANT: FD_SETSIZE 1024
 
diff --git a/basis/unix/bsd/openbsd/tags.txt b/basis/unix/ffi/bsd/openbsd/tags.txt
similarity index 100%
rename from basis/unix/bsd/openbsd/tags.txt
rename to basis/unix/ffi/bsd/openbsd/tags.txt
diff --git a/basis/unix/bsd/summary.txt b/basis/unix/ffi/bsd/summary.txt
similarity index 100%
rename from basis/unix/bsd/summary.txt
rename to basis/unix/ffi/bsd/summary.txt
diff --git a/basis/unix/bsd/tags.txt b/basis/unix/ffi/bsd/tags.txt
similarity index 100%
rename from basis/unix/bsd/tags.txt
rename to basis/unix/ffi/bsd/tags.txt
diff --git a/basis/unix/ffi/ffi.factor b/basis/unix/ffi/ffi.factor
new file mode 100644
index 0000000000..3882f6fc80
--- /dev/null
+++ b/basis/unix/ffi/ffi.factor
@@ -0,0 +1,158 @@
+! Copyright (C) 2010 Doug Coleman.
+! See http://factorcode.org/license.txt for BSD license.
+USING: alien alien.c-types alien.libraries alien.syntax
+classes.struct combinators kernel system unix.time unix.types
+vocabs vocabs.loader ;
+IN: unix.ffi
+
+<<
+
+{
+    { [ os linux? ] [ "unix.ffi.linux" require ] }
+    { [ os bsd? ] [ "unix.ffi.bsd" require ] }
+    { [ os solaris? ] [ "unix.ffi.solaris" require ] }
+} cond
+
+>>
+
+CONSTANT: PROT_NONE   0
+CONSTANT: PROT_READ   1
+CONSTANT: PROT_WRITE  2
+CONSTANT: PROT_EXEC   4
+                       
+CONSTANT: MAP_FILE    0
+CONSTANT: MAP_SHARED  1
+CONSTANT: MAP_PRIVATE 2
+
+CONSTANT: SEEK_SET 0
+CONSTANT: SEEK_CUR 1
+CONSTANT: SEEK_END 2
+
+: MAP_FAILED ( -- alien ) -1 <alien> ; inline
+
+CONSTANT: NGROUPS_MAX 16
+
+CONSTANT: DT_UNKNOWN   0
+CONSTANT: DT_FIFO      1
+CONSTANT: DT_CHR       2
+CONSTANT: DT_DIR       4
+CONSTANT: DT_BLK       6
+CONSTANT: DT_REG       8
+CONSTANT: DT_LNK      10
+CONSTANT: DT_SOCK     12
+CONSTANT: DT_WHT      14
+
+LIBRARY: libc
+
+FUNCTION: char* strerror ( int errno ) ;
+
+STRUCT: group
+    { gr_name char* }
+    { gr_passwd char* }
+    { gr_gid int }
+    { gr_mem char** } ;
+
+FUNCTION: int accept ( int s, void* sockaddr, socklen_t* socklen ) ;
+FUNCTION: int bind ( int s, void* name, socklen_t namelen ) ;
+FUNCTION: int chdir ( char* path ) ;
+FUNCTION: int chmod ( char* path, mode_t mode ) ;
+FUNCTION: int fchmod ( int fd, mode_t mode ) ;
+FUNCTION: int chown ( char* path, uid_t owner, gid_t group ) ;
+FUNCTION: int chroot ( char* path ) ;
+FUNCTION: int close ( int fd ) ;
+FUNCTION: int closedir ( DIR* dirp ) ;
+FUNCTION: int connect ( int s, void* name, socklen_t namelen ) ;
+FUNCTION: int dup2 ( int oldd, int newd ) ;
+FUNCTION: void endpwent ( ) ;
+FUNCTION: int fchdir ( int fd ) ;
+FUNCTION: int fchown ( int fd, uid_t owner, gid_t group ) ;
+FUNCTION: int fcntl ( int fd, int cmd, int arg ) ;
+FUNCTION: int flock ( int fd, int operation ) ;
+FUNCTION: void freeaddrinfo ( addrinfo* ai ) ;
+FUNCTION: int futimes ( int id, timeval[2] times ) ;
+FUNCTION: char* gai_strerror ( int ecode ) ;
+FUNCTION: int getaddrinfo ( char* hostname, char* servname, addrinfo* hints, addrinfo** res ) ;
+FUNCTION: char* getcwd ( char* buf, size_t size ) ;
+FUNCTION: pid_t getpid ;
+FUNCTION: int getdtablesize ;
+FUNCTION: gid_t getegid ;
+FUNCTION: uid_t geteuid ;
+FUNCTION: gid_t getgid ;
+FUNCTION: char* getenv ( char* name ) ;
+
+FUNCTION: int getgrgid_r ( gid_t gid, group* grp, char* buffer, size_t bufsize, group** result ) ;
+FUNCTION: int getgrnam_r ( char* name, group* grp, char* buffer, size_t bufsize, group** result ) ;
+FUNCTION: passwd* getpwent ( ) ;
+FUNCTION: passwd* getpwuid ( uid_t uid ) ;
+FUNCTION: passwd* getpwnam ( char* login ) ;
+FUNCTION: int getpwnam_r ( char* login, passwd* pwd, char* buffer, size_t bufsize, passwd** result ) ;
+FUNCTION: int getgroups ( int gidsetlen, gid_t* gidset ) ;
+FUNCTION: int getgrouplist ( char* name, int basegid, int* groups, int* ngroups ) ;
+FUNCTION: int getrlimit ( int resource, rlimit* rlp ) ;
+FUNCTION: int setrlimit ( int resource, rlimit* rlp ) ;
+FUNCTION: int getpriority ( int which, id_t who ) ;
+FUNCTION: int setpriority ( int which, id_t who, int prio ) ;
+FUNCTION: int getrusage ( int who, rusage* r_usage ) ;
+FUNCTION: group* getgrent ;
+FUNCTION: int gethostname ( char* name, int len ) ;
+FUNCTION: int getsockname ( int socket, sockaddr* address, socklen_t* address_len ) ;
+FUNCTION: int getpeername ( int socket, sockaddr* address, socklen_t* address_len ) ;
+FUNCTION: uid_t getuid ;
+FUNCTION: uint htonl ( uint n ) ;
+FUNCTION: ushort htons ( ushort n ) ;
+! FUNCTION: int issetugid ;
+FUNCTION: int ioctl ( int fd, ulong request, char* argp ) ;
+FUNCTION: int lchown ( char* path, uid_t owner, gid_t group ) ;
+FUNCTION: int listen ( int s, int backlog ) ;
+FUNCTION: off_t lseek ( int fildes, off_t offset, int whence ) ;
+FUNCTION: int mkdir ( char* path, mode_t mode ) ;
+FUNCTION: void* mmap ( void* addr, size_t len, int prot, int flags, int fd, off_t offset ) ;
+FUNCTION: int munmap ( void* addr, size_t len ) ;
+FUNCTION: uint ntohl ( uint n ) ;
+FUNCTION: ushort ntohs ( ushort n ) ;
+FUNCTION: int shutdown ( int fd, int how ) ;
+FUNCTION: int open ( char* path, int flags, int prot ) ;
+FUNCTION: DIR* opendir ( char* path ) ;
+
+STRUCT: utimbuf
+    { actime time_t }
+    { modtime time_t } ;
+
+FUNCTION: int utime ( char* path, utimbuf* buf ) ;
+
+FUNCTION: int pclose ( void* file ) ;
+FUNCTION: int pipe ( int* filedes ) ;
+FUNCTION: void* popen ( char* command, char* type ) ;
+FUNCTION: ssize_t read ( int fd, void* buf, size_t nbytes ) ;
+
+FUNCTION: dirent* readdir ( DIR* dirp ) ;
+FUNCTION: int readdir_r ( void* dirp, dirent* entry, dirent** result ) ;
+FUNCTION: ssize_t readlink ( char* path, char* buf, size_t bufsize ) ;
+
+CONSTANT: PATH_MAX 1024
+
+FUNCTION: ssize_t recv ( int s, void* buf, size_t nbytes, int flags ) ;
+FUNCTION: ssize_t recvfrom ( int s, void* buf, size_t nbytes, int flags, sockaddr-in* from, socklen_t* fromlen ) ;
+FUNCTION: int rename ( char* from, char* to ) ;
+FUNCTION: int rmdir ( char* path ) ;
+FUNCTION: int select ( int nfds, void* readfds, void* writefds, void* exceptfds, timeval* timeout ) ;
+FUNCTION: ssize_t sendto ( int s, void* buf, size_t len, int flags, sockaddr-in* to, socklen_t tolen ) ;
+FUNCTION: int setenv ( char* name, char* value, int overwrite ) ;
+FUNCTION: int unsetenv ( char* name ) ;
+FUNCTION: int setegid ( gid_t egid ) ;
+FUNCTION: int seteuid ( uid_t euid ) ;
+FUNCTION: int setgid ( gid_t gid ) ;
+FUNCTION: int setgroups ( int ngroups, gid_t* gidset ) ;
+FUNCTION: int setregid ( gid_t rgid, gid_t egid ) ;
+FUNCTION: int setreuid ( uid_t ruid, uid_t euid ) ;
+FUNCTION: int setsockopt ( int s, int level, int optname, void* optval, socklen_t optlen ) ;
+FUNCTION: int setuid ( uid_t uid ) ;
+FUNCTION: int socket ( int domain, int type, int protocol ) ;
+FUNCTION: int symlink ( char* path1, char* path2 ) ;
+FUNCTION: int link ( char* path1, char* path2 ) ;
+FUNCTION: int system ( char* command ) ;
+FUNCTION: int unlink ( char* path ) ;
+FUNCTION: int utimes ( char* path, timeval[2] times ) ;
+FUNCTION: ssize_t write ( int fd, void* buf, size_t nbytes ) ;
+
+"librt" "librt.so" "cdecl" add-library
diff --git a/basis/unix/ffi/linux/authors.txt b/basis/unix/ffi/linux/authors.txt
new file mode 100644
index 0000000000..b4bd0e7b35
--- /dev/null
+++ b/basis/unix/ffi/linux/authors.txt
@@ -0,0 +1 @@
+Doug Coleman
\ No newline at end of file
diff --git a/basis/unix/ffi/linux/linux.factor b/basis/unix/ffi/linux/linux.factor
new file mode 100644
index 0000000000..260796b5e4
--- /dev/null
+++ b/basis/unix/ffi/linux/linux.factor
@@ -0,0 +1,236 @@
+! Copyright (C) 2010 Doug Coleman.
+! See http://factorcode.org/license.txt for BSD license.
+USING: alien.c-types alien.syntax classes.struct unix.types ;
+IN: unix.ffi
+
+CONSTANT: MAXPATHLEN 1024
+
+CONSTANT: O_RDONLY   HEX: 0000
+CONSTANT: O_WRONLY   HEX: 0001
+CONSTANT: O_RDWR     HEX: 0002
+CONSTANT: O_CREAT    HEX: 0040
+CONSTANT: O_EXCL     HEX: 0080
+CONSTANT: O_NOCTTY   HEX: 0100
+CONSTANT: O_TRUNC    HEX: 0200
+CONSTANT: O_APPEND   HEX: 0400
+CONSTANT: O_NONBLOCK HEX: 0800
+
+ALIAS: O_NDELAY O_NONBLOCK
+
+CONSTANT: SOL_SOCKET 1
+
+CONSTANT: FD_SETSIZE 1024
+
+CONSTANT: SO_REUSEADDR 2
+CONSTANT: SO_OOBINLINE 10
+CONSTANT: SO_SNDTIMEO HEX: 15
+CONSTANT: SO_RCVTIMEO HEX: 14
+
+CONSTANT: F_SETFD 2
+CONSTANT: FD_CLOEXEC 1
+
+CONSTANT: F_SETFL 4
+
+STRUCT: addrinfo
+    { flags int }
+    { family int }
+    { socktype int }
+    { protocol int }
+    { addrlen socklen_t }
+    { addr void* }
+    { canonname char* }
+    { next addrinfo* } ;
+
+STRUCT: sockaddr-in
+    { family ushort }
+    { port ushort }
+    { addr in_addr_t }
+    { unused longlong } ;
+
+STRUCT: sockaddr-in6
+    { family ushort }
+    { port ushort }
+    { flowinfo uint }
+    { addr uchar[16] }
+    { scopeid uint } ;
+
+CONSTANT: max-un-path 108
+
+STRUCT: sockaddr-un
+    { family ushort }
+    { path { char max-un-path } } ;
+
+CONSTANT: SOCK_STREAM 1
+CONSTANT: SOCK_DGRAM 2
+
+CONSTANT: AF_UNSPEC 0
+CONSTANT: AF_UNIX 1
+CONSTANT: AF_INET 2
+CONSTANT: AF_INET6 10
+
+ALIAS: PF_UNSPEC AF_UNSPEC
+ALIAS: PF_UNIX AF_UNIX
+ALIAS: PF_INET AF_INET
+ALIAS: PF_INET6 AF_INET6
+
+CONSTANT: IPPROTO_TCP 6
+CONSTANT: IPPROTO_UDP 17
+
+CONSTANT: AI_PASSIVE 1
+
+CONSTANT: SEEK_SET 0
+CONSTANT: SEEK_CUR 1
+CONSTANT: SEEK_END 2
+
+STRUCT: passwd
+    { pw_name char* }
+    { pw_passwd char* }
+    { pw_uid uid_t }
+    { pw_gid gid_t }
+    { pw_gecos char* }
+    { pw_dir char* }
+    { pw_shell char* } ;
+
+! dirent64
+STRUCT: dirent
+    { d_ino ulonglong }
+    { d_off longlong }
+    { d_reclen ushort }
+    { d_type uchar }
+    { d_name char[256] } ;
+
+FUNCTION: int open64 ( char* path, int flags, int prot ) ;
+FUNCTION: dirent* readdir64 ( DIR* dirp ) ;
+FUNCTION: int readdir64_r ( void* dirp, dirent* entry, dirent** result ) ;
+
+CONSTANT: EPERM 1
+CONSTANT: ENOENT 2
+CONSTANT: ESRCH 3
+CONSTANT: EINTR 4
+CONSTANT: EIO 5
+CONSTANT: ENXIO 6
+CONSTANT: E2BIG 7
+CONSTANT: ENOEXEC 8
+CONSTANT: EBADF 9
+CONSTANT: ECHILD 10
+CONSTANT: EAGAIN 11
+CONSTANT: ENOMEM 12
+CONSTANT: EACCES 13
+CONSTANT: EFAULT 14
+CONSTANT: ENOTBLK 15
+CONSTANT: EBUSY 16
+CONSTANT: EEXIST 17
+CONSTANT: EXDEV 18
+CONSTANT: ENODEV 19
+CONSTANT: ENOTDIR 20
+CONSTANT: EISDIR 21
+CONSTANT: EINVAL 22
+CONSTANT: ENFILE 23
+CONSTANT: EMFILE 24
+CONSTANT: ENOTTY 25
+CONSTANT: ETXTBSY 26
+CONSTANT: EFBIG 27
+CONSTANT: ENOSPC 28
+CONSTANT: ESPIPE 29
+CONSTANT: EROFS 30
+CONSTANT: EMLINK 31
+CONSTANT: EPIPE 32
+CONSTANT: EDOM 33
+CONSTANT: ERANGE 34
+CONSTANT: EDEADLK 35
+CONSTANT: ENAMETOOLONG 36
+CONSTANT: ENOLCK 37
+CONSTANT: ENOSYS 38
+CONSTANT: ENOTEMPTY 39
+CONSTANT: ELOOP 40
+ALIAS: EWOULDBLOCK EAGAIN
+CONSTANT: ENOMSG 42
+CONSTANT: EIDRM 43
+CONSTANT: ECHRNG 44
+CONSTANT: EL2NSYNC 45
+CONSTANT: EL3HLT 46
+CONSTANT: EL3RST 47
+CONSTANT: ELNRNG 48
+CONSTANT: EUNATCH 49
+CONSTANT: ENOCSI 50
+CONSTANT: EL2HLT 51
+CONSTANT: EBADE 52
+CONSTANT: EBADR 53
+CONSTANT: EXFULL 54
+CONSTANT: ENOANO 55
+CONSTANT: EBADRQC 56
+CONSTANT: EBADSLT 57
+ALIAS: EDEADLOCK EDEADLK
+CONSTANT: EBFONT 59
+CONSTANT: ENOSTR 60
+CONSTANT: ENODATA 61
+CONSTANT: ETIME 62
+CONSTANT: ENOSR 63
+CONSTANT: ENONET 64
+CONSTANT: ENOPKG 65
+CONSTANT: EREMOTE 66
+CONSTANT: ENOLINK 67
+CONSTANT: EADV 68
+CONSTANT: ESRMNT 69
+CONSTANT: ECOMM 70
+CONSTANT: EPROTO 71
+CONSTANT: EMULTIHOP 72
+CONSTANT: EDOTDOT 73
+CONSTANT: EBADMSG 74
+CONSTANT: EOVERFLOW 75
+CONSTANT: ENOTUNIQ 76
+CONSTANT: EBADFD 77
+CONSTANT: EREMCHG 78
+CONSTANT: ELIBACC 79
+CONSTANT: ELIBBAD 80
+CONSTANT: ELIBSCN 81
+CONSTANT: ELIBMAX 82
+CONSTANT: ELIBEXEC 83
+CONSTANT: EILSEQ 84
+CONSTANT: ERESTART 85
+CONSTANT: ESTRPIPE 86
+CONSTANT: EUSERS 87
+CONSTANT: ENOTSOCK 88
+CONSTANT: EDESTADDRREQ 89
+CONSTANT: EMSGSIZE 90
+CONSTANT: EPROTOTYPE 91
+CONSTANT: ENOPROTOOPT 92
+CONSTANT: EPROTONOSUPPORT 93
+CONSTANT: ESOCKTNOSUPPORT 94
+CONSTANT: EOPNOTSUPP 95
+CONSTANT: EPFNOSUPPORT 96
+CONSTANT: EAFNOSUPPORT 97
+CONSTANT: EADDRINUSE 98
+CONSTANT: EADDRNOTAVAIL 99
+CONSTANT: ENETDOWN 100
+CONSTANT: ENETUNREACH 101
+CONSTANT: ENETRESET 102
+CONSTANT: ECONNABORTED 103
+CONSTANT: ECONNRESET 104
+CONSTANT: ENOBUFS 105
+CONSTANT: EISCONN 106
+CONSTANT: ENOTCONN 107
+CONSTANT: ESHUTDOWN 108
+CONSTANT: ETOOMANYREFS 109
+CONSTANT: ETIMEDOUT 110
+CONSTANT: ECONNREFUSED 111
+CONSTANT: EHOSTDOWN 112
+CONSTANT: EHOSTUNREACH 113
+CONSTANT: EALREADY 114
+CONSTANT: EINPROGRESS 115
+CONSTANT: ESTALE 116
+CONSTANT: EUCLEAN 117
+CONSTANT: ENOTNAM 118
+CONSTANT: ENAVAIL 119
+CONSTANT: EISNAM 120
+CONSTANT: EREMOTEIO 121
+CONSTANT: EDQUOT 122
+CONSTANT: ENOMEDIUM 123
+CONSTANT: EMEDIUMTYPE 124
+CONSTANT: ECANCELED 125
+CONSTANT: ENOKEY 126
+CONSTANT: EKEYEXPIRED 127
+CONSTANT: EKEYREVOKED 128
+CONSTANT: EKEYREJECTED 129
+CONSTANT: EOWNERDEAD 130
+CONSTANT: ENOTRECOVERABLE 131
diff --git a/basis/unix/solaris/authors.txt b/basis/unix/ffi/solaris/authors.txt
similarity index 100%
rename from basis/unix/solaris/authors.txt
rename to basis/unix/ffi/solaris/authors.txt
diff --git a/basis/unix/solaris/solaris.factor b/basis/unix/ffi/solaris/solaris.factor
similarity index 97%
rename from basis/unix/solaris/solaris.factor
rename to basis/unix/ffi/solaris/solaris.factor
index 1a1a7603f0..d641961a25 100644
--- a/basis/unix/solaris/solaris.factor
+++ b/basis/unix/ffi/solaris/solaris.factor
@@ -1,7 +1,7 @@
 ! Copyright (C) 2006 Patrick Mauritz.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: alien.c-types alien.syntax system kernel layouts ;
-IN: unix
+IN: unix.ffi
 
 ! Solaris.
 
@@ -52,7 +52,7 @@ STRUCT: sockaddr-in6
     { addr uchar[16] }
     { scopeid uint } ;
 
-: max-un-path 108 ;
+CONSTANT: max-un-path 108
 
 STRUCT: sockaddr-un
     { family ushort }
diff --git a/basis/unix/debugger/tags.txt b/basis/unix/ffi/solaris/tags.txt
similarity index 100%
rename from basis/unix/debugger/tags.txt
rename to basis/unix/ffi/solaris/tags.txt
diff --git a/basis/unix/groups/groups.factor b/basis/unix/groups/groups.factor
index 02d9f37023..a9b80002a8 100644
--- a/basis/unix/groups/groups.factor
+++ b/basis/unix/groups/groups.factor
@@ -4,10 +4,10 @@ USING: alien alien.c-types alien.strings io.encodings.utf8
 io.backend.unix kernel math sequences splitting strings
 combinators.short-circuit byte-arrays combinators
 accessors math.parser fry assocs namespaces continuations
-unix.users unix.utilities classes.struct ;
+unix.users unix.utilities classes.struct unix ;
 IN: unix.groups
 
-QUALIFIED: unix
+QUALIFIED: unix.ffi
 
 QUALIFIED: grouping
 
@@ -23,17 +23,21 @@ GENERIC: group-struct ( obj -- group/f )
     gr_mem>> utf8 alien>strings ;
 
 : (group-struct) ( id -- group-struct id group-struct byte-array length void* )
-    [ \ unix:group <struct> ] dip over 4096
+    [ \ unix.ffi:group <struct> ] dip over 4096
     [ <byte-array> ] keep f <void*> ;
 
 : check-group-struct ( group-struct ptr -- group-struct/f )
     *void* [ drop f ] unless ;
 
 M: integer group-struct ( id -- group/f )
-    (group-struct) [ unix:getgrgid_r unix:io-error ] keep check-group-struct ;
+    (group-struct)
+    [ [ unix.ffi:getgrgid_r ] unix-system-call io-error ] keep
+    check-group-struct ;
 
 M: string group-struct ( string -- group/f )
-    (group-struct) [ unix:getgrnam_r unix:io-error ] keep check-group-struct ;
+    (group-struct)
+    [ [ unix.ffi:getgrnam_r ] unix-system-call io-error ] keep
+    check-group-struct ;
 
 : group-struct>group ( group-struct -- group )
     [ \ group new ] dip
@@ -64,8 +68,8 @@ PRIVATE>
 
 : (user-groups) ( string -- seq )
     #! first group is -1337, legacy unix code
-    -1337 unix:NGROUPS_MAX [ 4 * <byte-array> ] keep
-    <int> [ unix:getgrouplist unix:io-error ] 2keep
+    -1337 unix.ffi:NGROUPS_MAX [ 4 * <byte-array> ] keep
+    <int> [ [ unix.ffi:getgrouplist ] unix-system-call io-error ] 2keep
     [ 4 tail-slice ] [ *int 1 - ] bi* >groups ;
 
 PRIVATE>
@@ -79,7 +83,7 @@ M: integer user-groups ( id -- seq )
     user-name (user-groups) ;
     
 : all-groups ( -- seq )
-    [ unix:getgrent dup ] [ \ unix:group memory>struct group-struct>group ] produce nip ;
+    [ [ unix.ffi:getgrent ] unix-system-call dup ] [ \ unix.ffi:group memory>struct group-struct>group ] produce nip ;
 
 : <group-cache> ( -- assoc )
     all-groups [ [ id>> ] keep ] H{ } map>assoc ;
@@ -87,11 +91,11 @@ M: integer user-groups ( id -- seq )
 : with-group-cache ( quot -- )
     [ <group-cache> group-cache ] dip with-variable ; inline
 
-: real-group-id ( -- id ) unix:getgid ; inline
+: real-group-id ( -- id ) unix.ffi:getgid ; inline
 
 : real-group-name ( -- string ) real-group-id group-name ; inline
 
-: effective-group-id ( -- string ) unix:getegid ; inline
+: effective-group-id ( -- string ) unix.ffi:getegid ; inline
 
 : effective-group-name ( -- string )
     effective-group-id group-name ; inline
@@ -111,10 +115,10 @@ GENERIC: set-effective-group ( obj -- )
 <PRIVATE
 
 : (set-real-group) ( id -- )
-    unix:setgid unix:io-error ; inline
+    [ unix.ffi:setgid ] unix-system-call io-error ; inline
 
 : (set-effective-group) ( id -- )
-    unix:setegid unix:io-error ; inline
+    [ unix.ffi:setegid ] unix-system-call io-error ; inline
 
 PRIVATE>
     
diff --git a/basis/unix/linux/linux.factor b/basis/unix/linux/linux.factor
index 93bf621acd..10bf070e1a 100644
--- a/basis/unix/linux/linux.factor
+++ b/basis/unix/linux/linux.factor
@@ -1,241 +1,6 @@
 ! Copyright (C) 2005, 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: alien.c-types alien.syntax alien system classes.struct
-unix.types ;
-IN: unix
-
-! Linux.
-
-CONSTANT: MAXPATHLEN 1024
-
-CONSTANT: O_RDONLY   HEX: 0000
-CONSTANT: O_WRONLY   HEX: 0001
-CONSTANT: O_RDWR     HEX: 0002
-CONSTANT: O_CREAT    HEX: 0040
-CONSTANT: O_EXCL     HEX: 0080
-CONSTANT: O_NOCTTY   HEX: 0100
-CONSTANT: O_TRUNC    HEX: 0200
-CONSTANT: O_APPEND   HEX: 0400
-CONSTANT: O_NONBLOCK HEX: 0800
-
-ALIAS: O_NDELAY O_NONBLOCK
-
-CONSTANT: SOL_SOCKET 1
-
-CONSTANT: FD_SETSIZE 1024
-
-CONSTANT: SO_REUSEADDR 2
-CONSTANT: SO_OOBINLINE 10
-CONSTANT: SO_SNDTIMEO HEX: 15
-CONSTANT: SO_RCVTIMEO HEX: 14
-
-CONSTANT: F_SETFD 2
-CONSTANT: FD_CLOEXEC 1
-
-CONSTANT: F_SETFL 4
-
-STRUCT: addrinfo
-    { flags int }
-    { family int }
-    { socktype int }
-    { protocol int }
-    { addrlen socklen_t }
-    { addr void* }
-    { canonname char* }
-    { next addrinfo* } ;
-
-STRUCT: sockaddr-in
-    { family ushort }
-    { port ushort }
-    { addr in_addr_t }
-    { unused longlong } ;
-
-STRUCT: sockaddr-in6
-    { family ushort }
-    { port ushort }
-    { flowinfo uint }
-    { addr uchar[16] }
-    { scopeid uint } ;
-
-CONSTANT: max-un-path 108
-
-STRUCT: sockaddr-un
-    { family ushort }
-    { path { char max-un-path } } ;
-
-CONSTANT: SOCK_STREAM 1
-CONSTANT: SOCK_DGRAM 2
-
-CONSTANT: AF_UNSPEC 0
-CONSTANT: AF_UNIX 1
-CONSTANT: AF_INET 2
-CONSTANT: AF_INET6 10
-
-ALIAS: PF_UNSPEC AF_UNSPEC
-ALIAS: PF_UNIX AF_UNIX
-ALIAS: PF_INET AF_INET
-ALIAS: PF_INET6 AF_INET6
-
-CONSTANT: IPPROTO_TCP 6
-CONSTANT: IPPROTO_UDP 17
-
-CONSTANT: AI_PASSIVE 1
-
-CONSTANT: SEEK_SET 0
-CONSTANT: SEEK_CUR 1
-CONSTANT: SEEK_END 2
-
-STRUCT: passwd
-    { pw_name char* }
-    { pw_passwd char* }
-    { pw_uid uid_t }
-    { pw_gid gid_t }
-    { pw_gecos char* }
-    { pw_dir char* }
-    { pw_shell char* } ;
-
-! dirent64
-STRUCT: dirent
-    { d_ino ulonglong }
-    { d_off longlong }
-    { d_reclen ushort }
-    { d_type uchar }
-    { d_name char[256] } ;
-
-FUNCTION: int open64 ( char* path, int flags, int prot ) ;
-FUNCTION: dirent* readdir64 ( DIR* dirp ) ;
-FUNCTION: int readdir64_r ( void* dirp, dirent* entry, dirent** result ) ;
+USING: system unix unix.ffi unix.ffi.linux ;
+IN: unix.linux
 
 M: linux open-file [ open64 ] unix-system-call ;
-
-CONSTANT: EPERM 1
-CONSTANT: ENOENT 2
-CONSTANT: ESRCH 3
-CONSTANT: EINTR 4
-CONSTANT: EIO 5
-CONSTANT: ENXIO 6
-CONSTANT: E2BIG 7
-CONSTANT: ENOEXEC 8
-CONSTANT: EBADF 9
-CONSTANT: ECHILD 10
-CONSTANT: EAGAIN 11
-CONSTANT: ENOMEM 12
-CONSTANT: EACCES 13
-CONSTANT: EFAULT 14
-CONSTANT: ENOTBLK 15
-CONSTANT: EBUSY 16
-CONSTANT: EEXIST 17
-CONSTANT: EXDEV 18
-CONSTANT: ENODEV 19
-CONSTANT: ENOTDIR 20
-CONSTANT: EISDIR 21
-CONSTANT: EINVAL 22
-CONSTANT: ENFILE 23
-CONSTANT: EMFILE 24
-CONSTANT: ENOTTY 25
-CONSTANT: ETXTBSY 26
-CONSTANT: EFBIG 27
-CONSTANT: ENOSPC 28
-CONSTANT: ESPIPE 29
-CONSTANT: EROFS 30
-CONSTANT: EMLINK 31
-CONSTANT: EPIPE 32
-CONSTANT: EDOM 33
-CONSTANT: ERANGE 34
-CONSTANT: EDEADLK 35
-CONSTANT: ENAMETOOLONG 36
-CONSTANT: ENOLCK 37
-CONSTANT: ENOSYS 38
-CONSTANT: ENOTEMPTY 39
-CONSTANT: ELOOP 40
-ALIAS: EWOULDBLOCK EAGAIN
-CONSTANT: ENOMSG 42
-CONSTANT: EIDRM 43
-CONSTANT: ECHRNG 44
-CONSTANT: EL2NSYNC 45
-CONSTANT: EL3HLT 46
-CONSTANT: EL3RST 47
-CONSTANT: ELNRNG 48
-CONSTANT: EUNATCH 49
-CONSTANT: ENOCSI 50
-CONSTANT: EL2HLT 51
-CONSTANT: EBADE 52
-CONSTANT: EBADR 53
-CONSTANT: EXFULL 54
-CONSTANT: ENOANO 55
-CONSTANT: EBADRQC 56
-CONSTANT: EBADSLT 57
-ALIAS: EDEADLOCK EDEADLK
-CONSTANT: EBFONT 59
-CONSTANT: ENOSTR 60
-CONSTANT: ENODATA 61
-CONSTANT: ETIME 62
-CONSTANT: ENOSR 63
-CONSTANT: ENONET 64
-CONSTANT: ENOPKG 65
-CONSTANT: EREMOTE 66
-CONSTANT: ENOLINK 67
-CONSTANT: EADV 68
-CONSTANT: ESRMNT 69
-CONSTANT: ECOMM 70
-CONSTANT: EPROTO 71
-CONSTANT: EMULTIHOP 72
-CONSTANT: EDOTDOT 73
-CONSTANT: EBADMSG 74
-CONSTANT: EOVERFLOW 75
-CONSTANT: ENOTUNIQ 76
-CONSTANT: EBADFD 77
-CONSTANT: EREMCHG 78
-CONSTANT: ELIBACC 79
-CONSTANT: ELIBBAD 80
-CONSTANT: ELIBSCN 81
-CONSTANT: ELIBMAX 82
-CONSTANT: ELIBEXEC 83
-CONSTANT: EILSEQ 84
-CONSTANT: ERESTART 85
-CONSTANT: ESTRPIPE 86
-CONSTANT: EUSERS 87
-CONSTANT: ENOTSOCK 88
-CONSTANT: EDESTADDRREQ 89
-CONSTANT: EMSGSIZE 90
-CONSTANT: EPROTOTYPE 91
-CONSTANT: ENOPROTOOPT 92
-CONSTANT: EPROTONOSUPPORT 93
-CONSTANT: ESOCKTNOSUPPORT 94
-CONSTANT: EOPNOTSUPP 95
-CONSTANT: EPFNOSUPPORT 96
-CONSTANT: EAFNOSUPPORT 97
-CONSTANT: EADDRINUSE 98
-CONSTANT: EADDRNOTAVAIL 99
-CONSTANT: ENETDOWN 100
-CONSTANT: ENETUNREACH 101
-CONSTANT: ENETRESET 102
-CONSTANT: ECONNABORTED 103
-CONSTANT: ECONNRESET 104
-CONSTANT: ENOBUFS 105
-CONSTANT: EISCONN 106
-CONSTANT: ENOTCONN 107
-CONSTANT: ESHUTDOWN 108
-CONSTANT: ETOOMANYREFS 109
-CONSTANT: ETIMEDOUT 110
-CONSTANT: ECONNREFUSED 111
-CONSTANT: EHOSTDOWN 112
-CONSTANT: EHOSTUNREACH 113
-CONSTANT: EALREADY 114
-CONSTANT: EINPROGRESS 115
-CONSTANT: ESTALE 116
-CONSTANT: EUCLEAN 117
-CONSTANT: ENOTNAM 118
-CONSTANT: ENAVAIL 119
-CONSTANT: EISNAM 120
-CONSTANT: EREMOTEIO 121
-CONSTANT: EDQUOT 122
-CONSTANT: ENOMEDIUM 123
-CONSTANT: EMEDIUMTYPE 124
-CONSTANT: ECANCELED 125
-CONSTANT: ENOKEY 126
-CONSTANT: EKEYEXPIRED 127
-CONSTANT: EKEYREVOKED 128
-CONSTANT: EKEYREJECTED 129
-CONSTANT: EOWNERDEAD 130
-CONSTANT: ENOTRECOVERABLE 131
diff --git a/basis/unix/solaris/tags.txt b/basis/unix/solaris/tags.txt
deleted file mode 100644
index 6bf68304bb..0000000000
--- a/basis/unix/solaris/tags.txt
+++ /dev/null
@@ -1 +0,0 @@
-unportable
diff --git a/basis/unix/stat/macosx/macosx.factor b/basis/unix/stat/macosx/macosx.factor
index a2104dcb33..4e6b2dfb21 100644
--- a/basis/unix/stat/macosx/macosx.factor
+++ b/basis/unix/stat/macosx/macosx.factor
@@ -1,5 +1,5 @@
 USING: alien.c-types arrays accessors combinators classes.struct
-alien.syntax unix.time unix.types ;
+alien.syntax unix.time unix.types unix.ffi ;
 IN: unix.stat
 
 ! Mac OS X
diff --git a/basis/unix/statfs/macosx/macosx.factor b/basis/unix/statfs/macosx/macosx.factor
index e83d2d40a0..56c8989895 100644
--- a/basis/unix/statfs/macosx/macosx.factor
+++ b/basis/unix/statfs/macosx/macosx.factor
@@ -3,7 +3,7 @@
 USING: alien.c-types io.encodings.utf8 io.encodings.string
 kernel sequences unix.stat accessors unix combinators math
 grouping system alien.strings math.bitwise alien.syntax
-unix.types classes.struct ;
+unix.types classes.struct unix.ffi ;
 IN: unix.statfs.macosx
 
 CONSTANT: MNT_RDONLY  HEX: 00000001
diff --git a/basis/unix/unix.factor b/basis/unix/unix.factor
index 86b8646bdd..4e77a41713 100644
--- a/basis/unix/unix.factor
+++ b/basis/unix/unix.factor
@@ -6,40 +6,9 @@ alien.syntax byte-arrays classes.struct combinators
 combinators.short-circuit combinators.smart continuations
 generalizations io kernel libc locals macros math namespaces
 sequences stack-checker strings system unix.time unix.types
-vocabs vocabs.loader ;
+vocabs vocabs.loader unix.ffi ;
 IN: unix
 
-CONSTANT: PROT_NONE   0
-CONSTANT: PROT_READ   1
-CONSTANT: PROT_WRITE  2
-CONSTANT: PROT_EXEC   4
-                       
-CONSTANT: MAP_FILE    0
-CONSTANT: MAP_SHARED  1
-CONSTANT: MAP_PRIVATE 2
-
-CONSTANT: SEEK_SET 0
-CONSTANT: SEEK_CUR 1
-CONSTANT: SEEK_END 2
-
-: MAP_FAILED ( -- alien ) -1 <alien> ; inline
-
-CONSTANT: NGROUPS_MAX 16
-
-CONSTANT: DT_UNKNOWN   0
-CONSTANT: DT_FIFO      1
-CONSTANT: DT_CHR       2
-CONSTANT: DT_DIR       4
-CONSTANT: DT_BLK       6
-CONSTANT: DT_REG       8
-CONSTANT: DT_LNK      10
-CONSTANT: DT_SOCK     12
-CONSTANT: DT_WHT      14
-
-LIBRARY: libc
-
-FUNCTION: char* strerror ( int errno ) ;
-
 ERROR: unix-error errno message ;
 
 : (io-error) ( -- * ) errno dup strerror unix-error ;
@@ -79,109 +48,14 @@ MACRO:: unix-system-call ( quot -- )
 
 HOOK: open-file os ( path flags mode -- fd )
 
-<<
-
-{
-    { [ os linux? ] [ "unix.linux" require ] }
-    { [ os bsd? ] [ "unix.bsd" require ] }
-    { [ os solaris? ] [ "unix.solaris" require ] }
-} cond
-
-"debugger" vocab [
-    "unix.debugger" require
-] when
-
->>
-
-STRUCT: group
-    { gr_name char* }
-    { gr_passwd char* }
-    { gr_gid int }
-    { gr_mem char** } ;
-
-FUNCTION: int accept ( int s, void* sockaddr, socklen_t* socklen ) ;
-FUNCTION: int bind ( int s, void* name, socklen_t namelen ) ;
-FUNCTION: int chdir ( char* path ) ;
-FUNCTION: int chmod ( char* path, mode_t mode ) ;
-FUNCTION: int fchmod ( int fd, mode_t mode ) ;
-FUNCTION: int chown ( char* path, uid_t owner, gid_t group ) ;
-FUNCTION: int chroot ( char* path ) ;
-
-FUNCTION: int close ( int fd ) ;
-FUNCTION: int closedir ( DIR* dirp ) ;
-
 : close-file ( fd -- ) [ close ] unix-system-call drop ;
 
-FUNCTION: int connect ( int s, void* name, socklen_t namelen ) ;
-FUNCTION: int dup2 ( int oldd, int newd ) ;
-! FUNCTION: int dup ( int oldd ) ;
 : _exit ( status -- * )
     #! We throw to give this a terminating stack effect.
     int f "_exit" { int } alien-invoke "Exit failed" throw ;
-FUNCTION: void endpwent ( ) ;
-FUNCTION: int fchdir ( int fd ) ;
-FUNCTION: int fchown ( int fd, uid_t owner, gid_t group ) ;
-FUNCTION: int fcntl ( int fd, int cmd, int arg ) ;
-FUNCTION: int flock ( int fd, int operation ) ;
-FUNCTION: void freeaddrinfo ( addrinfo* ai ) ;
-FUNCTION: int futimes ( int id, timeval[2] times ) ;
-FUNCTION: char* gai_strerror ( int ecode ) ;
-FUNCTION: int getaddrinfo ( char* hostname, char* servname, addrinfo* hints, addrinfo** res ) ;
-FUNCTION: char* getcwd ( char* buf, size_t size ) ;
-FUNCTION: pid_t getpid ;
-FUNCTION: int getdtablesize ;
-FUNCTION: gid_t getegid ;
-FUNCTION: uid_t geteuid ;
-FUNCTION: gid_t getgid ;
-FUNCTION: char* getenv ( char* name ) ;
-
-FUNCTION: int getgrgid_r ( gid_t gid, group* grp, char* buffer, size_t bufsize, group** result ) ;
-FUNCTION: int getgrnam_r ( char* name, group* grp, char* buffer, size_t bufsize, group** result ) ;
-FUNCTION: passwd* getpwent ( ) ;
-FUNCTION: passwd* getpwuid ( uid_t uid ) ;
-FUNCTION: passwd* getpwnam ( char* login ) ;
-FUNCTION: int getpwnam_r ( char* login, passwd* pwd, char* buffer, size_t bufsize, passwd** result ) ;
-FUNCTION: int getgroups ( int gidsetlen, gid_t* gidset ) ;
-FUNCTION: int getgrouplist ( char* name, int basegid, int* groups, int* ngroups ) ;
-FUNCTION: int getrlimit ( int resource, rlimit* rlp ) ;
-FUNCTION: int setrlimit ( int resource, rlimit* rlp ) ;
-
-FUNCTION: int getpriority ( int which, id_t who ) ;
-FUNCTION: int setpriority ( int which, id_t who, int prio ) ;
-
-FUNCTION: int getrusage ( int who, rusage* r_usage ) ;
-
-FUNCTION: group* getgrent ;
-FUNCTION: int gethostname ( char* name, int len ) ;
-FUNCTION: int getsockname ( int socket, sockaddr* address, socklen_t* address_len ) ;
-FUNCTION: int getpeername ( int socket, sockaddr* address, socklen_t* address_len ) ;
-FUNCTION: uid_t getuid ;
-FUNCTION: uint htonl ( uint n ) ;
-FUNCTION: ushort htons ( ushort n ) ;
-! FUNCTION: int issetugid ;
-FUNCTION: int ioctl ( int fd, ulong request, char* argp ) ;
-FUNCTION: int lchown ( char* path, uid_t owner, gid_t group ) ;
-FUNCTION: int listen ( int s, int backlog ) ;
-FUNCTION: off_t lseek ( int fildes, off_t offset, int whence ) ;
-FUNCTION: int mkdir ( char* path, mode_t mode ) ;
-FUNCTION: void* mmap ( void* addr, size_t len, int prot, int flags, int fd, off_t offset ) ;
-FUNCTION: int munmap ( void* addr, size_t len ) ;
-FUNCTION: uint ntohl ( uint n ) ;
-FUNCTION: ushort ntohs ( ushort n ) ;
-FUNCTION: int shutdown ( int fd, int how ) ;
-
-FUNCTION: int open ( char* path, int flags, int prot ) ;
 
 M: unix open-file [ open ] unix-system-call ;
 
-FUNCTION: DIR* opendir ( char* path ) ;
-
-STRUCT: utimbuf
-    { actime time_t }
-    { modtime time_t } ;
-
-FUNCTION: int utime ( char* path, utimbuf* buf ) ;
-
 : touch ( filename -- ) f [ utime ] unix-system-call drop ;
 
 : change-file-times ( filename access modification -- )
@@ -190,50 +64,18 @@ FUNCTION: int utime ( char* path, utimbuf* buf ) ;
         swap >>actime
         [ utime ] unix-system-call drop ;
 
-FUNCTION: int pclose ( void* file ) ;
-FUNCTION: int pipe ( int* filedes ) ;
-FUNCTION: void* popen ( char* command, char* type ) ;
-FUNCTION: ssize_t read ( int fd, void* buf, size_t nbytes ) ;
-
-FUNCTION: dirent* readdir ( DIR* dirp ) ;
-FUNCTION: int readdir_r ( void* dirp, dirent* entry, dirent** result ) ;
-FUNCTION: ssize_t readlink ( char* path, char* buf, size_t bufsize ) ;
-
-CONSTANT: PATH_MAX 1024
-
 : read-symbolic-link ( path -- path )
     PATH_MAX <byte-array> dup [
         PATH_MAX
         [ readlink ] unix-system-call
     ] dip swap head-slice >string ;
 
-FUNCTION: ssize_t recv ( int s, void* buf, size_t nbytes, int flags ) ;
-FUNCTION: ssize_t recvfrom ( int s, void* buf, size_t nbytes, int flags, sockaddr-in* from, socklen_t* fromlen ) ;
-FUNCTION: int rename ( char* from, char* to ) ;
-FUNCTION: int rmdir ( char* path ) ;
-FUNCTION: int select ( int nfds, void* readfds, void* writefds, void* exceptfds, timeval* timeout ) ;
-FUNCTION: ssize_t sendto ( int s, void* buf, size_t len, int flags, sockaddr-in* to, socklen_t tolen ) ;
-FUNCTION: int setenv ( char* name, char* value, int overwrite ) ;
-FUNCTION: int unsetenv ( char* name ) ;
-FUNCTION: int setegid ( gid_t egid ) ;
-FUNCTION: int seteuid ( uid_t euid ) ;
-FUNCTION: int setgid ( gid_t gid ) ;
-FUNCTION: int setgroups ( int ngroups, gid_t* gidset ) ;
-FUNCTION: int setregid ( gid_t rgid, gid_t egid ) ;
-FUNCTION: int setreuid ( uid_t ruid, uid_t euid ) ;
-FUNCTION: int setsockopt ( int s, int level, int optname, void* optval, socklen_t optlen ) ;
-FUNCTION: int setuid ( uid_t uid ) ;
-FUNCTION: int socket ( int domain, int type, int protocol ) ;
-FUNCTION: int symlink ( char* path1, char* path2 ) ;
-FUNCTION: int link ( char* path1, char* path2 ) ;
-FUNCTION: int system ( char* command ) ;
-
-FUNCTION: int unlink ( char* path ) ;
-
 : unlink-file ( path -- ) [ unlink ] unix-system-call drop ;
 
-FUNCTION: int utimes ( char* path, timeval[2] times ) ;
+<<
 
-FUNCTION: ssize_t write ( int fd, void* buf, size_t nbytes ) ;
+"debugger" vocab [
+    "unix.debugger" require
+] when
 
-"librt" "librt.so" "cdecl" add-library
+>>
diff --git a/basis/unix/users/users.factor b/basis/unix/users/users.factor
index 09119ff0cc..b279069c59 100644
--- a/basis/unix/users/users.factor
+++ b/basis/unix/users/users.factor
@@ -4,9 +4,9 @@ USING: alien alien.c-types alien.strings io.encodings.utf8
 io.backend.unix kernel math sequences splitting strings
 combinators.short-circuit grouping byte-arrays combinators
 accessors math.parser fry assocs namespaces continuations
-vocabs.loader system classes.struct ;
+vocabs.loader system classes.struct unix ;
 IN: unix.users
-QUALIFIED: unix
+QUALIFIED: unix.ffi
 
 TUPLE: passwd user-name password uid gid gecos dir shell ;
 
@@ -31,13 +31,13 @@ M: unix passwd>new-passwd ( passwd -- seq )
     } cleave ;
 
 : with-pwent ( quot -- )
-    [ unix:endpwent ] [ ] cleanup ; inline
+    [ unix.ffi:endpwent ] [ ] cleanup ; inline
 
 PRIVATE>
 
 : all-users ( -- seq )
     [
-        [ unix:getpwent dup ] [ unix:passwd memory>struct passwd>new-passwd ] produce nip
+        [ unix.ffi:getpwent dup ] [ unix.ffi:passwd memory>struct passwd>new-passwd ] produce nip
     ] with-pwent ;
 
 SYMBOL: user-cache
@@ -52,10 +52,10 @@ GENERIC: user-passwd ( obj -- passwd/f )
 
 M: integer user-passwd ( id -- passwd/f )
     user-cache get
-    [ at ] [ unix:getpwuid [ unix:passwd memory>struct passwd>new-passwd ] [ f ] if* ] if* ;
+    [ at ] [ unix.ffi:getpwuid [ unix.ffi:passwd memory>struct passwd>new-passwd ] [ f ] if* ] if* ;
 
 M: string user-passwd ( string -- passwd/f )
-    unix:getpwnam dup [ unix:passwd memory>struct passwd>new-passwd ] when ;
+    unix.ffi:getpwnam dup [ unix.ffi:passwd memory>struct passwd>new-passwd ] when ;
 
 : user-name ( id -- string )
     dup user-passwd
@@ -65,13 +65,13 @@ M: string user-passwd ( string -- passwd/f )
     user-passwd uid>> ;
 
 : real-user-id ( -- id )
-    unix:getuid ; inline
+    unix.ffi:getuid ; inline
 
 : real-user-name ( -- string )
     real-user-id user-name ; inline
 
 : effective-user-id ( -- id )
-    unix:geteuid ; inline
+    unix.ffi:geteuid ; inline
 
 : effective-user-name ( -- string )
     effective-user-id user-name ; inline
@@ -93,10 +93,10 @@ GENERIC: set-effective-user ( string/id -- )
 <PRIVATE
 
 : (set-real-user) ( id -- )
-    unix:setuid unix:io-error ; inline
+    [ unix.ffi:setuid ] unix-system-call io-error ; inline
 
 : (set-effective-user) ( id -- )
-    unix:seteuid unix:io-error ; inline
+    [ unix.ffi:seteuid ] unix-system-call io-error ; inline
 
 PRIVATE>