diff --git a/fmt/fmt_strm.3 b/fmt/fmt_strm.3
new file mode 100644
index 0000000..79d8f20
--- /dev/null
+++ b/fmt/fmt_strm.3
@@ -0,0 +1,20 @@
+.TH fmt_strm 3
+.SH NAME
+fmt_strm \- write multiple ASCII strings
+.SH SYNTAX
+.B #include <fmt.h>
+
+size_t \fBfmt_strm\fP(char *\fIdest\fR,const char *\fIsource\fR, ...);
+.SH DESCRIPTION
+fmt_strm copies all leading nonzero bytes from \fIsource\fR and
+following
+function arguments to \fIdest\fR and returns the number of bytes it
+copied.
+
+fmt_strm does not append \\0.
+
+If \fIdest\fR equals FMT_LEN (i.e. is zero), fmt_str returns the number
+of bytes it would have written, i.e. the number of leading nonzero bytes
+of \fIsource\fR and following function arguments.
+.SH "SEE ALSO"
+fmt_str(3), strcpy(3)
diff --git a/io/io_passfd.c b/io/io_passfd.c
index bfedf85..6e80b98 100644
--- a/io/io_passfd.c
+++ b/io/io_passfd.c
@@ -44,7 +44,9 @@ int io_passfd(int64 sock,int64 fd) {
 #define CMSG_SPACE(x) x+100
 #endif
   char buf[CMSG_SPACE(sizeof(int))];
+  memset(buf,0,sizeof(buf));
 #endif
+  memset(&msg,0,sizeof(msg));
   iov.iov_len=1;
   iov.iov_base="x";
   msg.msg_iov=&iov;
diff --git a/mmap/mmap_private.3 b/mmap/mmap_private.3
index 19b2efc..f2c440d 100644
--- a/mmap/mmap_private.3
+++ b/mmap/mmap_private.3
@@ -19,4 +19,4 @@ It can also be manually unmapped by calling \fBmunmap\fR from
 
 If the file could not be opened or mapped, (void*)0 is returned.
 .SH "SEE ALSO"
-munmap(2)
+mmap_unmap(3)
diff --git a/mmap/mmap_read.3 b/mmap/mmap_read.3
index bcb5653..6dd9e8c 100644
--- a/mmap/mmap_read.3
+++ b/mmap/mmap_read.3
@@ -16,4 +16,4 @@ It can also be manually unmapped by calling \fBmunmap\fR from
 
 If the file could not be opened or mapped, (void*)0 is returned.
 .SH "SEE ALSO"
-munmap(2)
+mmap_unmap(3)
diff --git a/mmap/mmap_shared.3 b/mmap/mmap_shared.3
index 87a480d..0a1ba90 100644
--- a/mmap/mmap_shared.3
+++ b/mmap/mmap_shared.3
@@ -23,4 +23,4 @@ To write changes to disk immediately, you can use msync from
 
 If the file could not be opened or mapped, (void*)0 is returned.
 .SH "SEE ALSO"
-munmap(2), msync(2)
+mmap_unmap(3), msync(2)
diff --git a/mmap/mmap_unmap.3 b/mmap/mmap_unmap.3
new file mode 100644
index 0000000..29cd88d
--- /dev/null
+++ b/mmap/mmap_unmap.3
@@ -0,0 +1,12 @@
+.TH mmap_unmap 3
+.SH NAME
+mmap_unmap \- unmap an existing memory mapping
+.SH SYNTAX
+.B #include <mmap.h>
+
+int \fBmmap_unmap\fP(char* \fImapped\fR,size_t \fImaplen\fR);
+.SH DESCRIPTION
+mmap_unmap removes a memory mapping established by mmap_read,
+mmap_private or mmap_shared.
+.SH "SEE ALSO"
+munmap(2), mmap_read(3), mmap_private(3), mmap_shared(3)
diff --git a/unix/winsock2errno.c b/unix/winsock2errno.c
index 3444fc7..c0cf71f 100644
--- a/unix/winsock2errno.c
+++ b/unix/winsock2errno.c
@@ -30,6 +30,8 @@ int winsock2errno(long l) {
       errno=ENAMETOOLONG; break;
     case WSAENOTEMPTY:
       errno=ENOTEMPTY; break;
+    case WSAEPROTONOSUPPORT:
+      errno=EPROTONOSUPPORT; break;
     default:
       errno=x;
       break;