diff --git a/stdlib/posix.pyi b/stdlib/posix.pyi
index 08b55d10a..21af3c2d2 100644
--- a/stdlib/posix.pyi
+++ b/stdlib/posix.pyi
@@ -87,10 +87,134 @@ if sys.platform != "win32":
         WTERMSIG as WTERMSIG,
         WUNTRACED as WUNTRACED,
         X_OK as X_OK,
+        DirEntry as DirEntry,
+        _exit as _exit,
+        abort as abort,
+        access as access,
+        chdir as chdir,
+        chmod as chmod,
+        chown as chown,
+        chroot as chroot,
+        close as close,
+        closerange as closerange,
+        confstr as confstr,
+        confstr_names as confstr_names,
+        cpu_count as cpu_count,
+        ctermid as ctermid,
+        device_encoding as device_encoding,
+        dup as dup,
+        error as error,
+        execv as execv,
+        execve as execve,
+        fchdir as fchdir,
+        fchmod as fchmod,
+        fchown as fchown,
+        fork as fork,
+        forkpty as forkpty,
+        fpathconf as fpathconf,
+        fspath as fspath,
+        fstat as fstat,
+        fstatvfs as fstatvfs,
+        fsync as fsync,
+        ftruncate as ftruncate,
+        get_blocking as get_blocking,
+        get_inheritable as get_inheritable,
+        get_terminal_size as get_terminal_size,
+        getcwd as getcwd,
+        getcwdb as getcwdb,
+        getegid as getegid,
+        geteuid as geteuid,
+        getgid as getgid,
+        getgrouplist as getgrouplist,
+        getgroups as getgroups,
+        getloadavg as getloadavg,
+        getlogin as getlogin,
+        getpgid as getpgid,
+        getpgrp as getpgrp,
+        getpid as getpid,
+        getppid as getppid,
+        getpriority as getpriority,
+        getsid as getsid,
+        getuid as getuid,
+        initgroups as initgroups,
+        isatty as isatty,
+        kill as kill,
+        killpg as killpg,
+        lchown as lchown,
+        link as link,
         listdir as listdir,
+        lockf as lockf,
+        lseek as lseek,
+        lstat as lstat,
+        major as major,
+        makedev as makedev,
+        minor as minor,
+        mkdir as mkdir,
+        mkfifo as mkfifo,
+        mknod as mknod,
+        nice as nice,
+        open as open,
+        openpty as openpty,
+        pathconf as pathconf,
+        pathconf_names as pathconf_names,
+        pipe as pipe,
+        pread as pread,
+        putenv as putenv,
+        pwrite as pwrite,
+        read as read,
+        readlink as readlink,
+        readv as readv,
+        remove as remove,
+        rename as rename,
+        replace as replace,
+        rmdir as rmdir,
+        scandir as scandir,
+        sched_get_priority_max as sched_get_priority_max,
+        sched_get_priority_min as sched_get_priority_min,
+        sched_param as sched_param,
+        sched_yield as sched_yield,
+        sendfile as sendfile,
+        set_blocking as set_blocking,
+        set_inheritable as set_inheritable,
+        setegid as setegid,
+        seteuid as seteuid,
+        setgid as setgid,
+        setgroups as setgroups,
+        setpgid as setpgid,
+        setpgrp as setpgrp,
+        setpriority as setpriority,
+        setregid as setregid,
+        setreuid as setreuid,
+        setsid as setsid,
+        setuid as setuid,
+        stat as stat,
         stat_result as stat_result,
+        statvfs as statvfs,
+        statvfs_result as statvfs_result,
+        strerror as strerror,
+        symlink as symlink,
+        sync as sync,
+        sysconf as sysconf,
+        sysconf_names as sysconf_names,
+        system as system,
+        tcgetpgrp as tcgetpgrp,
+        tcsetpgrp as tcsetpgrp,
+        terminal_size as terminal_size,
+        times as times,
         times_result as times_result,
+        truncate as truncate,
+        ttyname as ttyname,
+        umask as umask,
+        uname as uname,
         uname_result as uname_result,
+        unlink as unlink,
+        unsetenv as unsetenv,
+        urandom as urandom,
+        utime as utime,
+        wait as wait,
+        waitpid as waitpid,
+        write as write,
+        writev as writev,
     )
 
     if sys.platform == "linux":
@@ -101,6 +225,11 @@ if sys.platform != "win32":
             XATTR_CREATE as XATTR_CREATE,
             XATTR_REPLACE as XATTR_REPLACE,
             XATTR_SIZE_MAX as XATTR_SIZE_MAX,
+            getrandom as getrandom,
+            getxattr as getxattr,
+            listxattr as listxattr,
+            removexattr as removexattr,
+            setxattr as setxattr,
         )
     if sys.platform != "darwin":
         from os import (
@@ -110,11 +239,53 @@ if sys.platform != "win32":
             POSIX_FADV_RANDOM as POSIX_FADV_RANDOM,
             POSIX_FADV_SEQUENTIAL as POSIX_FADV_SEQUENTIAL,
             POSIX_FADV_WILLNEED as POSIX_FADV_WILLNEED,
+            fdatasync as fdatasync,
+            getresgid as getresgid,
+            getresuid as getresuid,
+            posix_fadvise as posix_fadvise,
+            posix_fallocate as posix_fallocate,
+            sched_getaffinity as sched_getaffinity,
+            sched_getparam as sched_getparam,
+            sched_getscheduler as sched_getscheduler,
+            sched_rr_get_interval as sched_rr_get_interval,
+            sched_setaffinity as sched_setaffinity,
+            sched_setparam as sched_setparam,
+            sched_setscheduler as sched_setscheduler,
+            setresgid as setresgid,
+            setresuid as setresuid,
+            waitid as waitid,
+            waitid_result as waitid_result,
         )
 
+    if sys.version_info >= (3, 9):
+        from os import waitstatus_to_exitcode as waitstatus_to_exitcode
     if sys.version_info >= (3, 8):
         from os import posix_spawn as posix_spawn, posix_spawnp as posix_spawnp
 
+        if sys.platform == "linux":
+            from os import (
+                MFD_ALLOW_SEALING as MFD_ALLOW_SEALING,
+                MFD_CLOEXEC as MFD_CLOEXEC,
+                MFD_HUGE_1GB as MFD_HUGE_1GB,
+                MFD_HUGE_1MB as MFD_HUGE_1MB,
+                MFD_HUGE_2GB as MFD_HUGE_2GB,
+                MFD_HUGE_2MB as MFD_HUGE_2MB,
+                MFD_HUGE_8MB as MFD_HUGE_8MB,
+                MFD_HUGE_16GB as MFD_HUGE_16GB,
+                MFD_HUGE_16MB as MFD_HUGE_16MB,
+                MFD_HUGE_32MB as MFD_HUGE_32MB,
+                MFD_HUGE_64KB as MFD_HUGE_64KB,
+                MFD_HUGE_256MB as MFD_HUGE_256MB,
+                MFD_HUGE_512KB as MFD_HUGE_512KB,
+                MFD_HUGE_512MB as MFD_HUGE_512MB,
+                MFD_HUGE_MASK as MFD_HUGE_MASK,
+                MFD_HUGE_SHIFT as MFD_HUGE_SHIFT,
+                MFD_HUGETLB as MFD_HUGETLB,
+                memfd_create as memfd_create,
+            )
+    if sys.version_info >= (3, 7):
+        from os import register_at_fork as register_at_fork
+
     # Not same as os.environ or os.environb
     # Because of this variable, we can't do "from posix import *" in os/__init__.pyi
     environ: dict[bytes, bytes]
diff --git a/tests/stubtest_allowlists/darwin-py310.txt b/tests/stubtest_allowlists/darwin-py310.txt
index c44779c75..10ce26026 100644
--- a/tests/stubtest_allowlists/darwin-py310.txt
+++ b/tests/stubtest_allowlists/darwin-py310.txt
@@ -14,5 +14,3 @@ os.CLD_STOPPED
 os.POSIX_SPAWN_CLOSE
 os.POSIX_SPAWN_DUP2
 os.POSIX_SPAWN_OPEN
-posix.register_at_fork
-posix.waitstatus_to_exitcode
diff --git a/tests/stubtest_allowlists/darwin-py37.txt b/tests/stubtest_allowlists/darwin-py37.txt
index 41485ea2d..8c6d33126 100644
--- a/tests/stubtest_allowlists/darwin-py37.txt
+++ b/tests/stubtest_allowlists/darwin-py37.txt
@@ -4,4 +4,3 @@ pwd.getpwnam
 
 # Exists at runtime, but missing from stubs
 ftplib.FTP.trust_server_pasv_ipv4_address
-posix.register_at_fork
diff --git a/tests/stubtest_allowlists/darwin-py38.txt b/tests/stubtest_allowlists/darwin-py38.txt
index b99d18e0f..da34281ca 100644
--- a/tests/stubtest_allowlists/darwin-py38.txt
+++ b/tests/stubtest_allowlists/darwin-py38.txt
@@ -4,4 +4,3 @@ _?curses.A_ITALIC
 os.POSIX_SPAWN_CLOSE
 os.POSIX_SPAWN_DUP2
 os.POSIX_SPAWN_OPEN
-posix.register_at_fork
diff --git a/tests/stubtest_allowlists/darwin-py39.txt b/tests/stubtest_allowlists/darwin-py39.txt
index be7a1000f..1a75d252c 100644
--- a/tests/stubtest_allowlists/darwin-py39.txt
+++ b/tests/stubtest_allowlists/darwin-py39.txt
@@ -12,5 +12,3 @@ os.CLD_STOPPED
 os.POSIX_SPAWN_CLOSE
 os.POSIX_SPAWN_DUP2
 os.POSIX_SPAWN_OPEN
-posix.register_at_fork
-posix.waitstatus_to_exitcode
diff --git a/tests/stubtest_allowlists/darwin.txt b/tests/stubtest_allowlists/darwin.txt
index 26c126d12..72e3a0977 100644
--- a/tests/stubtest_allowlists/darwin.txt
+++ b/tests/stubtest_allowlists/darwin.txt
@@ -12,7 +12,7 @@ os.EX_NOTFOUND
 os.SF_MNOWAIT
 os.SF_NODISKIO
 os.SF_SYNC
-os.sched_param  # system dependent. Unclear if macos has it.
+(os|posix).sched_param  # system dependent. Unclear if macos has it.
 posix.EX_NOTFOUND
 readline.append_history_file  # not defined in macos
 select.KQ_FILTER_NETDEV  # system dependent
@@ -57,140 +57,15 @@ grp.struct_group.n_unnamed_fields
 mimetypes.MimeTypes.read_windows_registry
 os.ST_NOSUID
 os.ST_RDONLY
-os.uname_result.n_fields
-os.uname_result.n_sequence_fields
-os.uname_result.n_unnamed_fields
-posix.DirEntry
-posix.abort
-posix.access
-posix.chdir
+(os|posix).uname_result.n_fields
+(os|posix).uname_result.n_sequence_fields
+(os|posix).uname_result.n_unnamed_fields
 posix.chflags
-posix.chmod
-posix.chown
-posix.chroot
-posix.close
-posix.closerange
-posix.confstr
-posix.cpu_count
-posix.ctermid
-posix.device_encoding
-posix.dup
 posix.dup2
-posix.execv
-posix.execve
-posix.fchdir
-posix.fchmod
-posix.fchown
-posix.fork
-posix.forkpty
-posix.fpathconf
-posix.fspath
-posix.fstat
-posix.fstatvfs
-posix.fsync
-posix.ftruncate
-posix.get_blocking
-posix.get_inheritable
-posix.get_terminal_size
-posix.getcwd
-posix.getcwdb
-posix.getegid
-posix.geteuid
-posix.getgid
-posix.getgrouplist
-posix.getgroups
-posix.getloadavg
-posix.getlogin
-posix.getpgid
-posix.getpgrp
-posix.getpid
-posix.getppid
-posix.getpriority
-posix.getsid
-posix.getuid
-posix.initgroups
-posix.isatty
-posix.kill
-posix.killpg
 posix.lchflags
 posix.lchmod
-posix.lchown
-posix.link
-posix.lockf
-posix.lseek
-posix.lstat
-posix.major
-posix.makedev
-posix.minor
-posix.mkdir
-posix.mkfifo
-posix.mknod
-posix.nice
-posix.open
-posix.openpty
-posix.pathconf
-posix.pipe
-posix.pread
-posix.putenv
-posix.pwrite
-posix.read
-posix.readlink
-posix.readv
-posix.remove
-posix.rename
-posix.replace
-posix.rmdir
-posix.scandir
-posix.sched_get_priority_max
-posix.sched_get_priority_min
-posix.sched_yield
-posix.sendfile
-posix.set_blocking
-posix.set_inheritable
-posix.setegid
-posix.seteuid
-posix.setgid
-posix.setgroups
-posix.setpgid
-posix.setpgrp
-posix.setpriority
-posix.setregid
-posix.setreuid
-posix.setsid
-posix.setuid
-posix.stat
-posix.stat_result.n_fields
-posix.stat_result.n_sequence_fields
-posix.stat_result.n_unnamed_fields
-posix.statvfs
-posix.strerror
-posix.symlink
-posix.sync
-posix.sysconf
-posix.system
-posix.tcgetpgrp
-posix.tcsetpgrp
-posix.times
-posix.times_result.n_fields
-posix.times_result.n_sequence_fields
-posix.times_result.n_unnamed_fields
-posix.truncate
-posix.ttyname
-posix.umask
-posix.uname
-posix.uname_result.n_fields
-posix.uname_result.n_sequence_fields
-posix.uname_result.n_unnamed_fields
-posix.unlink
-posix.unsetenv
-posix.urandom
-posix.utime
-posix.wait
 posix.wait3
 posix.wait4
-posix.waitpid
-posix.write
-posix.writev
 resource.struct_rusage.n_fields
 resource.struct_rusage.n_sequence_fields
 resource.struct_rusage.n_unnamed_fields
diff --git a/tests/stubtest_allowlists/linux-py310.txt b/tests/stubtest_allowlists/linux-py310.txt
index ac90ff849..b02c93538 100644
--- a/tests/stubtest_allowlists/linux-py310.txt
+++ b/tests/stubtest_allowlists/linux-py310.txt
@@ -1,19 +1,19 @@
 _curses.color_pair
 curses.color_pair
 os.pipe2
-os.posix_fadvise
-os.posix_fallocate
-os.sched_getaffinity
-os.sched_getparam
-os.sched_getscheduler
-os.sched_rr_get_interval
-os.sched_setaffinity
-os.sched_setparam
-os.sched_setscheduler
-os.setresgid
-os.setresuid
-os.waitid
-os.sendfile
+(os|posix).posix_fadvise
+(os|posix).posix_fallocate
+(os|posix).sched_getaffinity
+(os|posix).sched_getparam
+(os|posix).sched_getscheduler
+(os|posix).sched_rr_get_interval
+(os|posix).sched_setaffinity
+(os|posix).sched_setparam
+(os|posix).sched_setscheduler
+(os|posix).setresgid
+(os|posix).setresuid
+(os|posix).waitid
+(os|posix).sendfile
 signal.sigtimedwait
 signal.sigwaitinfo
 select.epoll.register
@@ -54,11 +54,8 @@ posix.copy_file_range
 posix.eventfd
 posix.eventfd_read
 posix.eventfd_write
-posix.memfd_create
 posix.pidfd_open
 posix.preadv
 posix.pwritev
-posix.register_at_fork
 posix.splice
-posix.waitstatus_to_exitcode
 time.pthread_getcpuclockid
diff --git a/tests/stubtest_allowlists/linux-py37.txt b/tests/stubtest_allowlists/linux-py37.txt
index 1df53ac40..5f990bdec 100644
--- a/tests/stubtest_allowlists/linux-py37.txt
+++ b/tests/stubtest_allowlists/linux-py37.txt
@@ -11,5 +11,4 @@ os.preadv
 os.pwritev
 posix.preadv
 posix.pwritev
-posix.register_at_fork
 time.pthread_getcpuclockid
diff --git a/tests/stubtest_allowlists/linux-py38.txt b/tests/stubtest_allowlists/linux-py38.txt
index 6bb2bf048..d8668f843 100644
--- a/tests/stubtest_allowlists/linux-py38.txt
+++ b/tests/stubtest_allowlists/linux-py38.txt
@@ -12,8 +12,6 @@ os.copy_file_range
 os.preadv
 os.pwritev
 posix.copy_file_range
-posix.memfd_create
 posix.preadv
 posix.pwritev
-posix.register_at_fork
 time.pthread_getcpuclockid
diff --git a/tests/stubtest_allowlists/linux-py39.txt b/tests/stubtest_allowlists/linux-py39.txt
index f85379c92..046b7923c 100644
--- a/tests/stubtest_allowlists/linux-py39.txt
+++ b/tests/stubtest_allowlists/linux-py39.txt
@@ -1,4 +1,4 @@
-os.sendfile
+(os|posix).sendfile
 select.epoll.register
 
 # Exists at runtime, but missing from stubs
@@ -23,10 +23,7 @@ os.pidfd_open
 os.preadv
 os.pwritev
 posix.copy_file_range
-posix.memfd_create
 posix.pidfd_open
 posix.preadv
 posix.pwritev
-posix.register_at_fork
-posix.waitstatus_to_exitcode
 time.pthread_getcpuclockid
diff --git a/tests/stubtest_allowlists/linux.txt b/tests/stubtest_allowlists/linux.txt
index 9fc8c5ee7..57b2e6f01 100644
--- a/tests/stubtest_allowlists/linux.txt
+++ b/tests/stubtest_allowlists/linux.txt
@@ -59,166 +59,19 @@ grp.struct_group.n_fields
 grp.struct_group.n_sequence_fields
 grp.struct_group.n_unnamed_fields
 mimetypes.MimeTypes.read_windows_registry
-os.sched_param.n_fields
-os.sched_param.n_sequence_fields
-os.sched_param.n_unnamed_fields
-os.uname_result.n_fields
-os.uname_result.n_sequence_fields
-os.uname_result.n_unnamed_fields
-os.waitid_result.n_fields
-os.waitid_result.n_sequence_fields
-os.waitid_result.n_unnamed_fields
-posix.DirEntry
-posix.abort
-posix.access
-posix.chdir
-posix.chmod
-posix.chown
-posix.chroot
-posix.close
-posix.closerange
-posix.confstr
-posix.cpu_count
-posix.ctermid
-posix.device_encoding
-posix.dup
+(os|posix).sched_param.n_fields
+(os|posix).sched_param.n_sequence_fields
+(os|posix).sched_param.n_unnamed_fields
+(os|posix).uname_result.n_fields
+(os|posix).uname_result.n_sequence_fields
+(os|posix).uname_result.n_unnamed_fields
+(os|posix).waitid_result.n_fields
+(os|posix).waitid_result.n_sequence_fields
+(os|posix).waitid_result.n_unnamed_fields
 posix.dup2
-posix.execv
-posix.execve
-posix.fchdir
-posix.fchmod
-posix.fchown
-posix.fdatasync
-posix.fork
-posix.forkpty
-posix.fpathconf
-posix.fspath
-posix.fstat
-posix.fstatvfs
-posix.fsync
-posix.ftruncate
-posix.get_blocking
-posix.get_inheritable
-posix.get_terminal_size
-posix.getcwd
-posix.getcwdb
-posix.getegid
-posix.geteuid
-posix.getgid
-posix.getgrouplist
-posix.getgroups
-posix.getloadavg
-posix.getlogin
-posix.getpgid
-posix.getpgrp
-posix.getpid
-posix.getppid
-posix.getpriority
-posix.getrandom
-posix.getresgid
-posix.getresuid
-posix.getsid
-posix.getuid
-posix.getxattr
-posix.initgroups
-posix.isatty
-posix.kill
-posix.killpg
-posix.lchown
-posix.link
-posix.listxattr
-posix.lockf
-posix.lseek
-posix.lstat
-posix.major
-posix.makedev
-posix.minor
-posix.mkdir
-posix.mkfifo
-posix.mknod
-posix.nice
-posix.open
-posix.openpty
-posix.pathconf
-posix.pipe
 posix.pipe2
-posix.posix_fadvise
-posix.posix_fallocate
-posix.pread
-posix.putenv
-posix.pwrite
-posix.read
-posix.readlink
-posix.readv
-posix.remove
-posix.removexattr
-posix.rename
-posix.replace
-posix.rmdir
-posix.scandir
-posix.sched_get_priority_max
-posix.sched_get_priority_min
-posix.sched_getaffinity
-posix.sched_getparam
-posix.sched_getscheduler
-posix.sched_param
-posix.sched_rr_get_interval
-posix.sched_setaffinity
-posix.sched_setparam
-posix.sched_setscheduler
-posix.sched_yield
-posix.sendfile
-posix.set_blocking
-posix.set_inheritable
-posix.setegid
-posix.seteuid
-posix.setgid
-posix.setgroups
-posix.setpgid
-posix.setpgrp
-posix.setpriority
-posix.setregid
-posix.setresgid
-posix.setresuid
-posix.setreuid
-posix.setsid
-posix.setuid
-posix.setxattr
-posix.stat
-posix.stat_result.n_fields
-posix.stat_result.n_sequence_fields
-posix.stat_result.n_unnamed_fields
-posix.statvfs
-posix.strerror
-posix.symlink
-posix.sync
-posix.sysconf
-posix.system
-posix.tcgetpgrp
-posix.tcsetpgrp
-posix.times
-posix.times_result.n_fields
-posix.times_result.n_sequence_fields
-posix.times_result.n_unnamed_fields
-posix.truncate
-posix.ttyname
-posix.umask
-posix.uname
-posix.uname_result.n_fields
-posix.uname_result.n_sequence_fields
-posix.uname_result.n_unnamed_fields
-posix.unlink
-posix.unsetenv
-posix.urandom
-posix.utime
-posix.wait
 posix.wait3
 posix.wait4
-posix.waitid
-posix.waitid_result
-posix.waitpid
-posix.write
-posix.writev
 resource.struct_rusage.n_fields
 resource.struct_rusage.n_sequence_fields
 resource.struct_rusage.n_unnamed_fields
diff --git a/tests/stubtest_allowlists/py36.txt b/tests/stubtest_allowlists/py36.txt
index f78cb8983..902c675ce 100644
--- a/tests/stubtest_allowlists/py36.txt
+++ b/tests/stubtest_allowlists/py36.txt
@@ -31,7 +31,7 @@ ipaddress._BaseNetwork.__init__
 json.loads
 mmap.ACCESS_DEFAULT
 multiprocessing.shared_memory
-os.utime
+(os|posix).utime
 plistlib.Dict.__init__
 pyexpat.XMLParserType.ExternalEntityParserCreate  # C signature is wrong - function gets only positional args
 random.Random.randrange  # missing undocumented arg _int
diff --git a/tests/stubtest_allowlists/py37.txt b/tests/stubtest_allowlists/py37.txt
index fbc192665..bde35c9fc 100644
--- a/tests/stubtest_allowlists/py37.txt
+++ b/tests/stubtest_allowlists/py37.txt
@@ -36,7 +36,7 @@ importlib.metadata  # Added in 3.8
 ipaddress._BaseNetwork.__init__
 json.loads
 multiprocessing.shared_memory
-os.utime
+(os|posix).utime
 pyexpat.XMLParserType.ExternalEntityParserCreate  # C signature is wrong - function gets only positional args
 queue.SimpleQueue.__init__  # Default C __init__ signature is wrong
 random.Random.randrange  # missing undocumented arg _int
diff --git a/tests/stubtest_allowlists/py3_common.txt b/tests/stubtest_allowlists/py3_common.txt
index b14cd8f93..820bf84af 100644
--- a/tests/stubtest_allowlists/py3_common.txt
+++ b/tests/stubtest_allowlists/py3_common.txt
@@ -571,15 +571,15 @@ multiprocessing.pool.Pool.Process
 multiprocessing.pool.ThreadPool.Process
 multiprocessing.reducer
 multiprocessing.synchronize.Semaphore.get_value
-os.stat_result.n_fields
-os.stat_result.n_sequence_fields
-os.stat_result.n_unnamed_fields
-os.terminal_size.n_fields
-os.terminal_size.n_sequence_fields
-os.terminal_size.n_unnamed_fields
-os.times_result.n_fields
-os.times_result.n_sequence_fields
-os.times_result.n_unnamed_fields
+(os|posix).stat_result.n_fields
+(os|posix).stat_result.n_sequence_fields
+(os|posix).stat_result.n_unnamed_fields
+(os|posix).terminal_size.n_fields
+(os|posix).terminal_size.n_sequence_fields
+(os|posix).terminal_size.n_unnamed_fields
+(os|posix).times_result.n_fields
+(os|posix).times_result.n_sequence_fields
+(os|posix).times_result.n_unnamed_fields
 pickle.Pickler.memo
 pickle.Unpickler.memo
 pipes.Template.makepipeline