Remove unnecessary use of FILEs in imap4d and pop3d.

* imap4d/imap4d.c (imap4d_mainloop): Take two file descriptor as
arguments.  All uses updated.
* imap4d/imap4d.h (io_setio): Change signature.
* imap4d/io.c (io_setio): Take two file descriptor as
arguments.  All uses updated.
* pop3d/extra.c (pop3d_setio): Take two file descriptor as
arguments.  All uses updated.
* pop3d/pop3d.c (pop3d_mainloop): Likewise.
* pop3d/pop3d.h (pop3d_setio): Change signature.

@@ -96,7 +96,7 @@ static const char *imap4d_capa[] = {
   NULL
 };
 
-static int imap4d_mainloop (int, FILE *, FILE *);
+static int imap4d_mainloop (int, int);
 
 static error_t
 imap4d_parse_opt (int key, char *arg, struct argp_state *state)
@@ -397,16 +397,16 @@ imap4d_child_signal_setup (RETSIGTYPE (*handler) (int signo))
 }
 
 static int
-imap4d_mainloop (int fd, FILE *infile, FILE *outfile)
+imap4d_mainloop (int ifd, int ofd)
 {
   imap4d_tokbuf_t tokp;
   char *text;
-  int debug_mode = isatty (fd);
+  int debug_mode = isatty (ifd);
 
   imap4d_child_signal_setup (imap4d_child_signal);
-  io_setio (infile, outfile);
+  io_setio (ifd, ofd);
 
-  if (imap4d_preauth_setup (fd) == 0)
+  if (imap4d_preauth_setup (ifd) == 0)
     {
       if (debug_mode)
 	{
@@ -451,7 +451,7 @@ imap4d_connection (int fd, struct sockaddr *sa, int salen, void *data,
   idle_timeout = timeout;
   if (imap4d_transcript != transcript)
     imap4d_transcript = transcript;
-  imap4d_mainloop (fd, fdopen (fd, "r"), fdopen (fd, "w"));
+  imap4d_mainloop (fd, fd);
   return 0;
 }
 
@@ -612,7 +612,7 @@ main (int argc, char **argv)
     {
       /* Make sure we are in the root directory.  */
       chdir ("/");
-      status = imap4d_mainloop (fileno (stdin), stdin, stdout);
+      status = imap4d_mainloop (MU_STDIN_FD, MU_STDOUT_FD);
     }
 
   if (status)

@@ -224,7 +224,7 @@ extern int io_stream_completion_response (mu_stream_t str,
 					  const char *format, ...)
                                     MU_PRINTFLIKE(4,5);
 int io_getline (char **pbuf, size_t *psize, size_t *pnbytes);
-void io_setio (FILE*, FILE*);
+void io_setio (int, int);
 void io_flush (void);
 int io_wait_input (int);
   

@@ -22,21 +22,21 @@
 mu_stream_t iostream;
 
 void
-io_setio (FILE *in, FILE *out)
+io_setio (int ifd, int ofd)
 {
   mu_stream_t str, istream, ostream;
   
-  if (!in)
+  if (ifd == -1)
     imap4d_bye (ERR_NO_IFILE);
-  if (!out)
+  if (ofd == -1)
     imap4d_bye (ERR_NO_OFILE);
 
-  if (mu_stdio_stream_create (&istream, fileno (in), 
+  if (mu_stdio_stream_create (&istream, ifd,
 			      MU_STREAM_READ | MU_STREAM_AUTOCLOSE))
     imap4d_bye (ERR_STREAM_CREATE);
   mu_stream_set_buffer (istream, mu_buffer_line, 0);
   
-  if (mu_stdio_stream_create (&ostream, fileno (out), 
+  if (mu_stdio_stream_create (&ostream, ofd, 
                               MU_STREAM_WRITE | MU_STREAM_AUTOCLOSE))
     imap4d_bye (ERR_STREAM_CREATE);
   mu_stream_set_buffer (ostream, mu_buffer_line, 0);

@@ -127,21 +127,21 @@ pop3d_abquit (int reason)
 }
 
 void
-pop3d_setio (FILE *in, FILE *out)
+pop3d_setio (int ifd, int ofd)
 {
   mu_stream_t str, istream, ostream;
   
-  if (!in)
+  if (ifd == -1)
     pop3d_abquit (ERR_NO_IFILE);
-  if (!out)
+  if (ofd == -1)
     pop3d_abquit (ERR_NO_OFILE);
 
-  if (mu_stdio_stream_create (&istream, fileno (in), 
+  if (mu_stdio_stream_create (&istream, ifd, 
                               MU_STREAM_READ | MU_STREAM_AUTOCLOSE))
     pop3d_abquit (ERR_NO_IFILE);
   mu_stream_set_buffer (istream, mu_buffer_line, 0);
   
-  if (mu_stdio_stream_create (&ostream, fileno (out), 
+  if (mu_stdio_stream_create (&ostream, ofd, 
                               MU_STREAM_WRITE | MU_STREAM_AUTOCLOSE))
     pop3d_abquit (ERR_NO_OFILE);
 

@@ -208,11 +208,10 @@ pop3d_get_client_address (int fd, struct sockaddr_in *pcs)
 /* The main part of the daemon. This function reads input from the client and
    executes the proper functions. Also handles the bulk of error reporting.
    Arguments:
-      fd        --  socket descriptor (for diagnostics)
-      infile    --  input stream
-      outfile   --  output stream */
+      ifd       --  input descriptor
+      ofd       --  output descriptor  */
 int
-pop3d_mainloop (int fd, FILE *infile, FILE *outfile)
+pop3d_mainloop (int ifd, int ofd)
 {
   int status = OK;
   char buffer[512];
@@ -221,7 +220,7 @@ pop3d_mainloop (int fd, FILE *infile, FILE *outfile)
 
   mu_set_signals (pop3d_child_signal, sigtab, MU_ARRAY_SIZE (sigtab));
 
-  pop3d_setio (infile, outfile);
+  pop3d_setio (ifd, ofd);
 
   state = initial_state;
 
@@ -299,7 +298,7 @@ pop3d_connection (int fd, struct sockaddr *sa, int salen, void *data,
   idle_timeout = timeout;
   if (pop3d_transcript != transcript)
     pop3d_transcript = transcript;
-  pop3d_mainloop (fd, fdopen (fd, "r"), fdopen (fd, "w"));
+  pop3d_mainloop (fd, fd);
   return 0;
 }
 
@@ -430,7 +429,7 @@ main (int argc, char **argv)
     {
       /* Make sure we are in the root directory.  */
       chdir ("/");
-      status = pop3d_mainloop (fileno (stdin), stdin, stdout);
+      status = pop3d_mainloop (MU_STDIN_FD, MU_STDOUT_FD);
     }
   
   if (status)

@@ -241,7 +241,7 @@ extern int pop3d_touchlock      (void);
 extern int pop3d_unlock         (void);
 extern void pop3d_outf          (const char *fmt, ...) MU_PRINTFLIKE(1,2);
 
-extern void pop3d_setio         (FILE *in, FILE *out);
+extern void pop3d_setio         (int, int);
 extern char *pop3d_readline     (char *, size_t);
 extern void pop3d_flush_output  (void);