diff --git a/libc/calls/sigtimedwait.h b/libc/calls/sigtimedwait.h
index 1c37888764e..0f8cd86fb5c 100644
--- a/libc/calls/sigtimedwait.h
+++ b/libc/calls/sigtimedwait.h
@@ -6,6 +6,7 @@
 #if !(__ASSEMBLER__ + __LINKER__ + 0)
 COSMOPOLITAN_C_START_
 
+int sigwait(const sigset_t *, int *);
 int sigtimedwait(const sigset_t *, siginfo_t *, const struct timespec *);
 int sigwaitinfo(const sigset_t *, siginfo_t *);
 
diff --git a/libc/calls/sigwait.c b/libc/calls/sigwait.c
new file mode 100644
index 00000000000..32b6b5e644b
--- /dev/null
+++ b/libc/calls/sigwait.c
@@ -0,0 +1,26 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2023 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/calls/sigtimedwait.h"
+
+int sigwait(const sigset_t *mask, int *sig) {
+  siginfo_t si;
+  if (sigtimedwait(mask, &si, 0) < 0) return -1;
+  *sig = si.si_signo;
+  return 0;
+}
diff --git a/libc/calls/uname.c b/libc/calls/uname.c
index de964564bcf..c3a3136daab 100644
--- a/libc/calls/uname.c
+++ b/libc/calls/uname.c
@@ -145,12 +145,12 @@ int uname(struct utsname *uts) {
   } else if (IsLinux()) {
     struct utsname_linux linux;
     if (!(rc = sys_uname_linux(&linux))) {
-      stpcpy(uts->sysname, linux.sysname);
-      stpcpy(uts->nodename, linux.nodename);
-      stpcpy(uts->release, linux.release);
-      stpcpy(uts->version, linux.version);
-      stpcpy(uts->machine, linux.machine);
-      stpcpy(uts->domainname, linux.domainname);
+      strlcpy(uts->sysname, linux.sysname, SYS_NMLN);
+      strlcpy(uts->nodename, linux.nodename, SYS_NMLN);
+      strlcpy(uts->release, linux.release, SYS_NMLN);
+      strlcpy(uts->version, linux.version, SYS_NMLN);
+      strlcpy(uts->machine, linux.machine, SYS_NMLN);
+      strlcpy(uts->domainname, linux.domainname, SYS_NMLN);
       if (!strcmp(uts->domainname, "(none)")) {
         uts->domainname[0] = 0;
       }
@@ -166,7 +166,6 @@ int uname(struct utsname *uts) {
   } else if (IsWindows()) {
     stpcpy(uts->sysname, "Windows");
     stpcpy(uts->machine, "x86_64");
-    GetNtVersion(stpcpy(uts->version, "Windows "));
     GetNtVersion(uts->release);
     GetNtName(uts->nodename, kNtComputerNamePhysicalDnsHostname);
     GetNtName(uts->domainname, kNtComputerNamePhysicalDnsDomain);
@@ -174,6 +173,18 @@ int uname(struct utsname *uts) {
   } else {
     rc = enosys();
   }
+  if (!rc) {
+    char buf[SYS_NMLN];
+    stpcpy(buf, "Cosmopolitan 3.0-alpha");
+    if (*MODE) {
+      strlcat(buf, " MODE=" MODE, SYS_NMLN);
+    }
+    if (*uts->version) {
+      strlcat(buf, "; ", SYS_NMLN);
+      strlcat(buf, uts->version, SYS_NMLN);
+    }
+    strlcpy(uts->version, buf, SYS_NMLN);
+  }
   STRACE("uname([{%#s, %#s, %#s, %#s, %#s, %#s}]) → %d% m",
          Str(rc, uts->sysname), Str(rc, uts->nodename), Str(rc, uts->release),
          Str(rc, uts->version), Str(rc, uts->machine), Str(rc, uts->domainname),
diff --git a/libc/intrin/cxaatexit.c b/libc/intrin/cxaatexit.c
index fcc809096df..c10d1bf65ac 100644
--- a/libc/intrin/cxaatexit.c
+++ b/libc/intrin/cxaatexit.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/assert.h"
 #include "libc/intrin/bsr.h"
 #include "libc/intrin/cxaatexit.internal.h"
 #include "libc/intrin/strace.internal.h"
@@ -60,7 +59,6 @@ int __cxa_atexit(void *fp, void *arg, void *pred) {
     }
   }
   i = _bsr(~b->mask);
-  unassert(i < ARRAYLEN(b->p));
   b->mask |= 1u << i;
   b->p[i].fp = fp;
   b->p[i].arg = arg;
diff --git a/libc/intrin/cxafinalize.c b/libc/intrin/cxafinalize.c
index 064399c9d6a..eee304ad1e9 100644
--- a/libc/intrin/cxafinalize.c
+++ b/libc/intrin/cxafinalize.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/assert.h"
 #include "libc/intrin/bsf.h"
 #include "libc/intrin/cxaatexit.internal.h"
 #include "libc/intrin/strace.internal.h"
@@ -60,7 +59,6 @@ void __cxa_finalize(void *pred) {
       if (!pred) {
         b2 = b->next;
         if (b2) {
-          unassert(b != &__cxa_blocks.root);
           if (_weaken(free)) {
             _weaken(free)(b);
           }
diff --git a/libc/intrin/pthread_mutex_unlock.c b/libc/intrin/pthread_mutex_unlock.c
index c5b3bac3737..44bbe36770d 100644
--- a/libc/intrin/pthread_mutex_unlock.c
+++ b/libc/intrin/pthread_mutex_unlock.c
@@ -17,14 +17,12 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
-#include "libc/calls/state.internal.h"
 #include "libc/errno.h"
 #include "libc/intrin/atomic.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/intrin/weaken.h"
 #include "libc/runtime/internal.h"
 #include "libc/thread/thread.h"
-#include "libc/thread/tls.h"
 #include "third_party/nsync/mu.h"
 
 /**
diff --git a/libc/isystem/wchar.h b/libc/isystem/wchar.h
index 0d0fc0fdf93..ecf5ecada9d 100644
--- a/libc/isystem/wchar.h
+++ b/libc/isystem/wchar.h
@@ -1,6 +1,7 @@
 #ifndef _WCHAR_H
 #define _WCHAR_H
 #include "libc/fmt/conv.h"
+#include "libc/mem/mem.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 #include "libc/str/unicode.h"
diff --git a/third_party/musl/grp.c b/third_party/musl/grp.c
index 9a1e9269987..a1a5e06be88 100644
--- a/third_party/musl/grp.c
+++ b/third_party/musl/grp.c
@@ -25,11 +25,13 @@
 │  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                      │
 │                                                                              │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
 #include "libc/errno.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
+#include "libc/sysv/consts/limits.h"
 #include "libc/thread/thread.h"
 #include "third_party/musl/passwd.h"
 
@@ -246,3 +248,10 @@ struct group *getgrnam(const char *name) {
             &g_getgrent->mem, &nmem, &res);
   return res;
 }
+
+int initgroups(const char *user, gid_t gid) {
+  gid_t groups[NGROUPS_MAX];
+  int count = NGROUPS_MAX;
+  if (getgrouplist(user, gid, groups, &count) < 0) return -1;
+  return setgroups(count, groups);
+}
diff --git a/third_party/musl/passwd.h b/third_party/musl/passwd.h
index 4de9bd83ad5..0fffc42bc7d 100644
--- a/third_party/musl/passwd.h
+++ b/third_party/musl/passwd.h
@@ -43,7 +43,7 @@ void setgrent(void);
 struct group *fgetgrent(struct FILE *);
 int putgrent(const struct group *, struct FILE *);
 int getgrouplist(const char *, gid_t, gid_t *, int *);
-int initgroups(const char *, int32_t);
+int initgroups(const char *, gid_t);
 
 COSMOPOLITAN_C_END_
 #endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */