Repatch (from linux) of OSX IRAF

1 files changed, 2130 insertions, 0 deletions

diff --git a/vendor/x11iraf/cdl/vximtool.c b/vendor/x11iraf/cdl/vximtool.c
new file mode 100644
index 00000000..e0b4b0fe
--- /dev/null
+++ b/vendor/x11iraf/cdl/vximtool.c
@@ -0,0 +1,2130 @@
+/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+ */
+ 
+#include <sys/times.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#if defined(AIX) || defined(AIXV3) || defined (AIXV4)
+#include <sys/select.h>
+#endif
+#include <netinet/in.h>
+#include <sys/un.h> 
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+#ifdef	HAVE_CDL 	/* If we have the CDL we can build a proxy server. */
+#include "cdl.h"
+#endif
+
+
+/*
+ *  VXIMTOOL.C -- Virtual image display server.  This is a server process much
+ *  like XIMTOOL, except that all the process does is respond to datastream
+ *  requests to read and write to internal frame buffers maintained as arrays
+ *  in memory.  Multiple frame buffers and frame buffer configurations are
+ *  supported.   A log is kept to the stderr of all datastream requests.  The
+ *  process is terminated with an EOF on the stdin.
+ *
+ *
+ *  To build:  cc vximtool.c -o vximtool
+ *             cc vximtool.c -o vximtool -lsocket # For Solaris systems
+ *             cc -DANSI_FUNC vximtool.c          # Use ANSI function prototypes
+ *
+ *  Usage:  vximtool -verbose >& spool            # run server, log output
+ *	    vximtool -i		                  # run interactively
+ *	    vximtool -noraster	                  # don't store images in memory
+ *	    vximtool -i < cursor_file             # take cursor input from file
+ *
+ *  Options     
+ * 
+ *    vximtool [-background] [-config <num>] [-fifo <pipe>] [-fifo_only] [-help]
+ *        [-i] [-imtoolrc <file>] [-inet_only | -port_only] [-noraster] 
+ *        [-nframes <num>] [-port <num>] [-proxy] [-verbose] [-unix <name>] 
+ *        [-unix_only] 
+ *
+ *
+ *  Minimal match for command line options may be used.  In interactive mode,
+ *  cursor value strings may be typed in on the server stdin in response to
+ *  cursor read requests from the client.  Otherwise, a constant cursor value
+ *  "1.0 1.0 101 q" is returned.
+ */
+
+
+/* Default values, size limiting values.
+ */
+#define	MAX_FBCONFIG		128	/* max possible frame buf sizes	*/
+#ifndef	HAVE_CDL
+#define	MAX_FRAMES		16	/* max number of frames		*/
+#endif
+#define	MAX_MAPPINGS		32	/* max number mappings/frame	*/
+#define	MAX_CLIENTS		8	/* max display server clients	*/
+#define	DEF_NFRAMES		1	/* save memory; only one frame	*/
+#define	DEF_FRAME_WIDTH		512	/* 512 square frame		*/
+#define	DEF_FRAME_HEIGHT	512	/* 512 square frame		*/
+
+#define	SZ_LABEL	256		/* main frame label string	*/
+#define	SZ_IMTITLE	128		/* image title string		*/
+#define	SZ_FIFOBUF	4000		/* transfer size for FIFO i/o	*/
+#define	SZ_FNAME	256
+#define	SZ_LINE		256
+
+/* Magic numbers. */
+#define DEF_PORT	5137	        /* default tcp/ip socket  	*/
+#define DEF_PROXY_PORT	5136	        /* default proxy socket  	*/
+#define	I_DEVNAME	"/dev/imt1o"    /* pseudo device names    	*/
+#define	O_DEVNAME	"/dev/imt1i"    /* our IN is client's OUT 	*/
+#define	DEF_UNIXADDR	"/tmp/.IMT%d"   /* default unix socket    	*/
+#define	FBCONFIG_1	".imtoolrc"
+#define	FBCONFIG_2	"/usr/local/lib/imtoolrc"
+#define	FBCONFIG_ENV1	"imtoolrc"
+#define	FBCONFIG_ENV2	"IMTOOLRC"
+
+/* IIS definitions. */
+#define IO_TIMEOUT      30
+#define MAXCONN         5
+#define SZ_IOBUF        65536           /* max size data transfer       */
+#define SZ_FIFOBUF      4000
+#define SZ_OLD_WCSBUF   320             /* old WCS text buffer size     */
+#define SZ_WCSBUF       1024            /* WCS text buffer size         */
+#define SZ_FNAME        256
+#define SZ_IMCURVAL     160
+
+#define IIS_VERSION     10              /* version 10 -> 1.0            */
+
+#define MEMORY          01              /* frame buffer i/o             */
+#define LUT             02              /* lut i/o                      */
+#define FEEDBACK        05              /* used for frame clears        */
+#define IMCURSOR        020             /* logical image cursor         */
+#define WCS             021             /* used to set WCS              */
+
+#define PACKED          0040000
+#define COMMAND         0100000
+#define IIS_READ        0100000
+#define IMC_SAMPLE      0040000
+#define IMT_FBCONFIG    077
+#define XYMASK          077777
+
+struct  iism70 {			/* DO NOT change the order of   */
+        short   tid;			/* this structure.		*/
+        short   thingct;
+        short   subunit;
+        short   checksum;
+        short   x, y, z;
+        short   t;
+};
+
+/* IIS data pixel values. */
+#define CMS_DATASTART   1
+#define CMS_DATAEND     200
+#define CMS_DATARANGE   200
+
+/* WCS definitions. */
+#define	W_UNITARY	0
+#define	W_LINEAR	1
+#define	W_LOG		2
+#define	W_DEFFORMAT	" %7.2f %7.2f %7.1f%c"
+
+/* Rotation matrix defining world coordinate system (WCS) of a frame.  */
+typedef struct {
+	int valid;			/* has WCS been set?		   */
+	float a, b;			/* x, y scale factors		   */
+	float c, d;			/* x, y cross factors		   */
+	float tx, ty;			/* x, y translation		   */
+	float z1, z2;			/* greyscale range		   */
+	int zt;				/* greyscale mapping		   */
+	char format[32];		/* wcs output format		   */
+	char imtitle[SZ_IMTITLE+1];	/* image title from WCS	*/
+} Ctran, *CtranPtr;
+
+/* Coordinate mappings on each frame buffer. */
+typedef struct {
+        int   id;                       /* object id                    */
+        Ctran ctran;                    /* world coordinate system      */
+        char  ref[SZ_FNAME+1];          /* image reference from WCS     */
+        int   regid;                    /* region id                    */
+        char  region[SZ_FNAME+1];       /* region name from WCS         */
+        float sx, sy;                   /* source rect                  */
+        int   snx, sny;                 
+        int   dx, dy;                   /* destination rect             */
+        int   dnx, dny;                 
+} Mapping, *MappingPtr;
+
+/* The frame buffers. */
+typedef struct {
+	int frameno;			/* frame number			   */
+	char *framebuf;			/* frame buffer raster		   */
+	char label[SZ_LABEL+1];		/* frame label string		   */
+	Ctran ctran;			/* world coordinate system	   */
+	char wcsbuf[SZ_WCSBUF];		/* wcs info string		   */
+        Mapping mapping[MAX_MAPPINGS];  /* coordinate mappings          */
+        int     nmaps;                  /* number of defined mappings   */
+} FrameBuf, *FrameBufPtr;
+
+/* Possible frame buffer sizes. */
+typedef struct {
+	int nframes;			/* number of frames		   */
+	int width;			/* frame buffer width		   */
+	int height;			/* frame buffer height		   */
+} FbConfig, *FbConfigPtr;
+
+/* Client I/O channel. */
+typedef struct {
+	void *vxim;			/* backpointer to vxim descriptor   */
+	int type;			/* channel type 		   */
+	int listen_fd;			/* socket server fd		   */
+	int datain;			/* input channel 		   */
+	int dataout;			/* output channel 		   */
+	int keepalive;			/* used to keep input fifo ready   */
+	int connected;			/* channel is connected to client  */
+	int port;			/* inet port number 		   */
+	char path[SZ_FNAME+1];		/* for unix sockets 		   */
+	int reference_frame;		/* reference (cmd i/o) frame 	   */
+        int version;                    /* flags capability of client    */
+	FrameBufPtr rf_p;		/* reference frame descriptor 	   */
+} IoChan, *IoChanPtr;
+
+#define	IO_FIFO		1
+#define	IO_INET		2
+#define	IO_UNIX		3
+
+
+/* Application runtime descriptor.
+ * --------------------------------
+ */
+typedef struct {
+	int  def_config;		   /* default FB config            */
+	int  def_nframes;		   /* default number of frames     */
+	char *imtoolrc;			   /* imtoolrc file name           */
+	char *input_fifo;		   /* client's output              */
+	char *output_fifo;		   /* client's input               */
+	char *unixaddr;			   /* format for unix socket path  */
+	int  port;			   /* port for INET socket         */
+
+	/* Internal state. */
+	int display_frame;		   /* currently displayed frame    */
+	int fb_configno;		   /* current config number        */
+	int nframes;			   /* current number of frame bufs */
+	int width, height;		   /* current width, height        */
+	IoChan chan[MAX_CLIENTS];	   /* client i/o descriptors       */
+	FrameBufPtr df_p;		   /* display frame descriptor     */
+	FrameBuf frames[MAX_FRAMES];	   /* array of frame descriptors   */
+	FbConfig fb_config[MAX_FBCONFIG];  /* fb config table              */
+
+} VXimData, *VXimDataPtr;
+
+
+/* Initialize the structure with out starting values.  These can be reset
+ * with command line options.
+ */
+VXimData server_data = {
+	1,				    /* def_config 		   */
+	DEF_NFRAMES,			    /* def_nframes 		   */
+	FBCONFIG_2,			    /* def_imtoolrc 		   */
+	O_DEVNAME,			    /* input_fifo		   */
+	I_DEVNAME,			    /* output_fifo	 	   */
+	DEF_UNIXADDR,			    /* unixaddr	 		   */
+	DEF_PORT,			    /* port		 	   */
+	1,				    /* display_frame 		   */
+	1,				    /* fb_configno	 	   */
+	2,				    /* nframes	 		   */
+	512, 512			    /* width, height 		   */
+};
+
+/* Functions.
+ */
+#ifndef abs
+#define	abs(a)		(((a)<0)?(-(a)):(a))
+#endif
+#ifndef min
+#define min(a,b)	((a)<(b)?(a):(b))
+#endif
+#ifndef max
+#define max(a,b)	((a)<(b)?(b):(a))
+#endif
+
+#ifdef SOLARIS
+#define bzero(a,n)      memset(a,0,n)
+#define bcopy(a,b,n)    memmove(b,a,n)
+#endif
+
+#define	SELWIDTH	32
+
+#ifdef HAVE_CDL
+static 	int	proxy = 0;
+static  int	nclients = 0;
+CDLPtr	cdl[MAX_CLIENTS];
+#endif
+static	int	keep_raster = 1;
+extern	int	errno;
+static	int	background = 0;
+static	int	objid = 0;
+static	int	verbose = 0;
+static	int	interactive = 0;
+static	float	cursor_x = 1.0, cursor_y = 1.0;
+static	fd_set	fds, allset;
+
+
+#ifdef  ANSI_FUNC
+
+int main(int argc, char **argv);
+static int 	 vx_iisopen(register VXimDataPtr vxim);
+static void 	 vx_iisclose(register VXimDataPtr vxim);
+static IoChanPtr open_fifo(register VXimDataPtr vxim);
+static IoChanPtr open_inet(register VXimDataPtr vxim);
+static IoChanPtr open_unix(register VXimDataPtr vxim);
+static void 	 vx_connectClient(IoChanPtr chan, int *source);
+static void 	 vx_disconnectClient(register IoChanPtr chan);
+static IoChanPtr get_iochan(register VXimDataPtr vxim);
+static void 	 vx_iisio(IoChanPtr chan, int *fd_addr, int source);
+static void 	 set_fbconfig(IoChanPtr chan, int config, int frame);
+static int	 decode_frameno(register int z);
+static void	 bswap2(char *a, char *b, int nbytes);
+static void 	 vx_retCursorVal(register int dataout, float sx, float sy,
+		     int wcs, int key, char *strval);
+static CtranPtr  wcs_update(register VXimDataPtr vxim, FrameBufPtr fr);
+static void 	 vx_initialize(register VXimDataPtr vxim, int config,
+		     int nframes, int reset);
+static void 	 vx_initFrame(register VXimDataPtr vxim, int frame,
+		     int nframes, FbConfigPtr config);
+static void 	 vx_eraseFrame(register VXimDataPtr vxim, int frame);
+static void 	 get_fbconfig(register VXimDataPtr vxim);
+static void 	 Usage(void);
+static void 	 printoption(char *st);
+static void	 add_mapping(register VXimDataPtr vxim, CtranPtr ctran, 
+		     char *wcsbuf, FrameBufPtr fr);
+#ifdef	HAVE_CDL
+static void 	 vx_flip(char *buffer, int nx, int ny);
+#endif
+static int 	 iis_read (int fd, void *vptr, int nbytes);
+static int 	 iis_write (int fd, void *vptr, int nbytes);
+
+#else
+
+static void 	 vx_iisclose(), vx_connectClient(), vx_disconnectClient();
+static void	 vx_iisio(), set_fbconfig(), vx_retCursorVal();
+static void 	 vx_initialize(), vx_initFrame(), vx_eraseFrame();
+static void 	 get_fbconfig(), Usage(), printoption();
+static void	 add_mapping();
+#ifdef	HAVE_CDL
+static void 	 vx_flip();
+#endif
+static int 	 vx_iisopen(), decode_frameno(), iis_read(), iis_write();
+static void	 bswap2();
+static IoChanPtr open_fifo(), open_inet(), open_unix(), get_iochan();
+static CtranPtr  wcs_update();
+
+#endif
+
+
+/* 
+ * VXIMTOOL -- Virtual display server process.  This task is an image display
+ * server like XImtool, responding to datastream requests on fifo pipes,
+ * inet sockets, or unix sockets.  Up to 16 frames are supported, frame
+ * buffers may be any of the defined frames in the imtoolrc file.  Images
+ * are stored in memory, allowing readback by the client.  Cursor input can
+ * come from stdin (or a redirected file) allowing the user to respond to
+ * client cursor requests.  The task is terminated with an EOF on stdin.
+ */
+
+#ifdef ANSI_FUNC
+
+int 
+main (int argc, char **argv)
+#else
+
+main (argc, argv)
+int	argc;
+char	**argv;
+#endif
+{
+        register VXimDataPtr vxim = &server_data;
+	register IoChanPtr chan;
+	register int i, nopen, n;
+	char 	 buf[SZ_FNAME];
+	int	 fd;
+
+	/* Process the command line arguments. */
+	for (i=1; i < argc; i++) {
+
+#ifdef	HAVE_CDL
+            /* Anything without a '-' is a client device to add to the proxy
+             * list.  Format of the arg must be a valid IMTDEV string.
+             */
+            if (proxy && argv[i][0] != '-') {
+		if ((cdl[nclients++] = cdl_open (argv[i])) == (CDLPtr) NULL)
+		    nclients--;
+		else if (verbose)
+		    printf ("Connected to server on %s\n", argv[i]);
+		continue;
+ 	    }
+#endif
+	    if (strncmp (argv[i], "-background", 2) == 0) {
+                background = 1;
+	    } else if (strncmp (argv[i], "-config", 2) == 0) {
+                vxim->def_config = atoi (argv[++i]);
+	    } else if (strncmp (argv[i], "-fifo_only", 6) == 0) {
+                vxim->unixaddr = "none";
+                vxim->port = 0;
+	    } else if (strncmp (argv[i], "-fifo", 5) == 0) {
+                vxim->input_fifo = (char *) calloc (SZ_FNAME, sizeof(char));
+                vxim->output_fifo = (char *) calloc (SZ_FNAME, sizeof(char));
+                sprintf (vxim->input_fifo, "%si", argv[++i]);
+                sprintf (vxim->output_fifo, "%so", argv[i]);
+	    } else if (strncmp (argv[i], "-help", 2) == 0) {
+		Usage ();
+		exit (0);
+	    } else if (strncmp (argv[i], "-imtoolrc", 3) == 0) {
+                vxim->imtoolrc = argv[++i];
+	    } else if (strncmp (argv[i], "-inet_only", 3) == 0) {
+                vxim->input_fifo = "";
+                vxim->unixaddr = "none";
+	    } else if (strcmp (argv[i], "-i") == 0) {
+		interactive++;
+	    } else if (strncmp (argv[i], "-noraster", 3) == 0) {
+		keep_raster = 0;
+	    } else if (strncmp (argv[i], "-nframes", 3) == 0) {
+		i++;
+                vxim->def_nframes = min (MAX_FRAMES, atoi (argv[i]));
+	    } else if (strncmp (argv[i], "-port_only", 6) == 0) {
+                vxim->input_fifo = "";
+                vxim->unixaddr = "none";
+	    } else if (strncmp (argv[i], "-port", 5) == 0) {
+                vxim->port = atoi (argv[++i]);
+#ifdef	HAVE_CDL
+	    } else if (strncmp (argv[i], "-proxy", 5) == 0) {
+                proxy = 1;
+                vxim->port = DEF_PROXY_PORT;	/* re-assign port	      */
+                vxim->input_fifo = "";		/* shut off other connections */
+                vxim->unixaddr = "none";
+#endif
+	    } else if (strncmp (argv[i], "-verbose", 2) == 0) {
+                verbose = 1;
+	    } else if (strncmp (argv[i], "-unix_only", 6) == 0) {
+                vxim->input_fifo = "";
+                vxim->port = 0;
+	    } else if (strncmp (argv[i], "-unix", 5) == 0) {
+                vxim->unixaddr = argv[++i];
+	    }
+	}
+
+#ifdef	HAVE_CDL
+	/* If we're acting as a proxy server, but can't connect to anything,
+	 * exit.  In this case it is required that the servers be running
+	 * before starting the proxy program so we have a connection waiting.
+	 */
+	if (!nclients && proxy) {
+	    fprintf (stderr, "Error: No servers available for display.\007\n");
+	    exit (-1);
+	}
+#endif
+
+        /* Initialize the frame buffers */
+        vx_initialize (vxim, vxim->def_config, vxim->def_nframes, 1);
+
+        /* Listen for a client connection and initialize the fdset. */
+	if (!(nopen = vx_iisopen (vxim))) {
+	    fprintf (stderr, "Error: Cannot open client communications.\007\n");
+	    exit (-1);
+	}
+	FD_ZERO (&allset);
+ 	for (i=0; i < nopen; i++) {
+            chan = &vxim->chan[i];
+ 	    FD_SET (chan->datain, &allset); 
+	}
+ 	if (!background || interactive)
+	    FD_SET (fileno(stdin), &allset); 
+
+	/* Sit in a loop waiting on input, processing the events. */
+	while (1) {
+   	    fds = allset;		/* reset the FD set on each pass */
+
+	    if ((n = select (SELWIDTH, &fds, NULL, NULL, NULL)) > 0) {
+
+		/* Loop over each of the open connections, checking for and
+		 * processing input on any that are ready.
+		 */
+ 		for (i=0; i < nopen; i++) {
+             	    chan = &vxim->chan[i]; 
+             	    fd = chan->datain;
+		    if (FD_ISSET(fd, &fds)) {
+
+		  	/* Connect the client if not already connected. */
+		        if (!chan->connected) {
+			    if (verbose)  {
+				if (chan->type == IO_UNIX)
+				    fprintf (stderr,
+					"connecting client on %s\n",
+					chan->path);
+				else if (chan->type == IO_INET)
+				    fprintf (stderr,
+					"connecting client on port %d\n",
+					vxim->port);
+			    }
+		            vx_connectClient (chan, &chan->datain);
+		        }
+
+			/* Process any waiting input. */
+ 			vx_iisio (chan, &chan->datain, chan->type);  
+			fflush (stdout); fflush (stderr);
+		    }
+		}
+
+		/* Check the stdin for an EOF so we can quit gracefully. */
+ 	        if (!background) {
+		    if (FD_ISSET(fileno(stdin), &fds)) {
+		        if ((n = read (fileno(stdin), buf, SZ_FNAME)) <= 0) {
+        		    /* Shut it down. */
+ 			    vx_iisclose (vxim); 
+			    exit (0);
+		        }
+		    }
+		}
+
+	    } else if (n < 0) {
+		fprintf (stderr, "Error: select error\007\n");
+		exit (-1);
+	    }
+	}
+}
+
+
+
+/* VX_IISOPEN -- Initialize the IIS protocol module and ready the module to
+ * accept client connections and begin processing client requests.  Clients
+ * may connect to the server using a fifo connection or an internet or
+ * UNIX domain socket connection.  All three types of server ports are
+ * simultaneously ready to receive client connections.
+ */
+#ifdef ANSI_FUNC
+
+static int 
+vx_iisopen (register VXimDataPtr vxim)
+#else
+
+static int
+vx_iisopen (vxim)
+register VXimDataPtr vxim;
+#endif
+{
+	int nopen = 0;
+
+	if (open_fifo (vxim))
+	    nopen++;
+	if (open_inet (vxim))
+	    nopen++;
+	if (open_unix (vxim))
+	    nopen++;
+
+	return (nopen);
+}
+
+
+/* VX_IISCLOSE -- Close down the IIS protocol module.
+ */
+#ifdef ANSI_FUNC
+
+static void 
+vx_iisclose (register VXimDataPtr vxim)
+#else
+
+static void
+vx_iisclose (vxim)
+register VXimDataPtr vxim;
+#endif
+{
+	register IoChanPtr chan = NULL;
+	register FrameBufPtr fb;
+	register int i, j;
+
+	for (i=0;  i < (sizeof(vxim->chan) / sizeof(vxim->chan[0]));  i++) {
+	    chan = &vxim->chan[i];
+
+	    /* Free the in-memory frame buffer rasters. */
+	    for (j=0; j < vxim->nframes; j++) {
+	        fb = &vxim->frames[j];
+	        if (keep_raster && fb->framebuf)
+		    free (fb->framebuf);
+	    }
+
+	    /* Close the I/O channels. */
+	    switch (chan->type) {
+	    case IO_FIFO:
+		if (chan->keepalive >= 0)
+		    close (chan->keepalive);
+		if (chan->datain >= 0)
+		    close (chan->datain);
+		if (chan->dataout >= 0)
+		    close (chan->dataout);
+		chan->type = 0;
+	        if (verbose)
+	            fprintf (stderr, "vximtool: closing fifo connection\n");
+		break;
+
+	    case IO_INET:
+		close (chan->datain);
+		chan->type = 0;
+	        if (verbose)
+	            fprintf (stderr, "vximtool: closing inet socket\n");
+		break;
+
+	    case IO_UNIX:
+		close (chan->datain);
+		unlink (chan->path);
+		chan->type = 0;
+	        if (verbose)
+	            fprintf (stderr, "vximtool: closing unix socket\n");
+		break;
+	    }
+	}
+}
+
+
+/* OPEN_FIFO -- Open the server fifo port and make ready to accept client
+ * connections and begin processing client requests.  There is no client
+ * yet at this stage.
+ */
+#ifdef ANSI_FUNC
+
+static IoChanPtr 
+open_fifo (register VXimDataPtr vxim)
+#else
+
+static IoChanPtr
+open_fifo (vxim)
+register VXimDataPtr vxim;
+#endif
+{
+	register IoChanPtr chan;
+	int datain, dataout;
+	int keepalive;
+
+	/* Setting the input fifo to "none" or the null string disables
+	 * fifo support.
+	 */
+	if (!vxim->input_fifo[0] || strcmp(vxim->input_fifo,"none")==0)
+	    return (NULL);
+
+	datain = dataout = -1;
+
+	/* Open the output fifo (which is the client's input fifo).  We have
+	 * to open it ourselves first as a client to get around the fifo
+	 * open-no-client error.  
+	 */
+	if ((datain = open (vxim->input_fifo, O_RDONLY|O_NDELAY)) != -1) {
+	    if ((dataout = open (vxim->input_fifo, O_WRONLY|O_NDELAY)) != -1)
+		fcntl (dataout, F_SETFL, O_WRONLY);
+	    else
+		goto done;
+	    close (datain);
+	} else
+	    goto done;
+
+	/* Open the input stream, a FIFO pseudodevice file used by
+	 * applications to send us commands and data.
+	 */
+	if ((datain = open (vxim->output_fifo, O_RDONLY|O_NDELAY)) == -1)
+	    goto done;
+	else {
+	    /* Clear O_NDELAY for reading. */
+	    fcntl (datain, F_SETFL, O_RDONLY);
+
+	    /* Open the client's output fifo as a pseudo-client to make it
+	     * appear that a client is connected.
+	     */
+	    keepalive = open (vxim->output_fifo, O_WRONLY);
+	}
+done:
+	/* Allocate and fill in i/o channel descriptor. */
+	if (datain > 0 && dataout > 0 && (chan = get_iochan(vxim))) {
+	    chan->vxim = (void *) vxim;
+	    chan->type = IO_FIFO;
+	    chan->datain = datain;
+	    chan->dataout = dataout;
+	    chan->keepalive = keepalive;
+	    chan->connected = 1;
+	    chan->reference_frame = 1;
+	    chan->rf_p = &vxim->frames[0];
+	} else {
+	    fprintf (stderr, "Warning: cannot open %s\n", vxim->output_fifo);
+	    chan = NULL;
+	}
+
+	/* Register input callback. */
+	if (!chan) {
+	    if (datain > 0)
+		close (datain);
+	    if (dataout > 0)
+		close (dataout);
+	} else if (verbose) {
+	    fprintf (stderr,
+		"vximtool: Open to accept input on fifo: %s\n", vxim->input_fifo);
+	}
+
+	return (chan);
+}
+
+
+/* OPEN_INET -- Set up a port to be used for incoming client connections
+ * using internet domain sockets.
+ */
+#ifdef ANSI_FUNC
+
+static IoChanPtr 
+open_inet (register VXimDataPtr vxim)
+#else
+
+static IoChanPtr
+open_inet (vxim)
+register VXimDataPtr vxim;
+#endif
+{
+	register int s = 0;
+	register IoChanPtr chan;
+	struct sockaddr_in sockaddr;
+
+	/* Setting the port to zero disables inet socket support. */
+	if (vxim->port <= 0)
+	    return (NULL);
+
+	if ((s = socket (AF_INET, SOCK_STREAM, 0)) < 0)
+	    goto err;
+
+	memset ((void *)&sockaddr, 0, sizeof(sockaddr));
+	sockaddr.sin_family = AF_INET;
+	sockaddr.sin_port = htons((short)vxim->port);
+	sockaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+	if (bind (s, (struct sockaddr *)&sockaddr, sizeof(sockaddr)) < 0)
+	    goto err;
+
+	if (listen (s, MAXCONN) < 0)
+	    goto err;
+
+	/* Allocate and fill in i/o channel descriptor. */
+	if ((chan = get_iochan(vxim))) {
+	    chan->vxim = (void *) vxim;
+	    chan->type = IO_INET;
+	    chan->port = vxim->port;
+	    chan->datain = s;
+	    chan->dataout = s;
+	    chan->listen_fd = s;
+	    chan->connected = 0;
+	    chan->reference_frame = 1;
+	    chan->rf_p = &vxim->frames[0];
+	    if (verbose)
+	        fprintf (stderr,
+		    "vximtool: Open to accept input on inet: port %d\n", 
+		    vxim->port);
+	    return (chan);
+	}
+err:
+	fprintf (stderr, "vximtool: cannot open socket on port %d, errno=%d\n",
+	    vxim->port, errno);
+	if (s)
+	    close (s);
+	return (NULL);
+}
+
+
+/* OPEN_UNIX -- Set up a port to be used for incoming client connections
+ * using unix domain sockets.
+ */
+#ifdef ANSI_FUNC
+
+static IoChanPtr 
+open_unix (register VXimDataPtr vxim)
+#else
+
+static IoChanPtr
+open_unix (vxim)
+register VXimDataPtr vxim;
+#endif
+{
+	register int s = 0;
+	register IoChanPtr chan;
+	struct sockaddr_un sockaddr;
+	char path[256];
+
+	/* Setting the addr to "none" or the null string disables unix
+	 * socket support.
+	 */
+	if (!vxim->unixaddr[0] || strcmp(vxim->unixaddr,"none")==0)
+	    return (NULL);
+
+	/* Get path to be used for the unix domain socket. */
+	sprintf (path, vxim->unixaddr, getuid());
+	unlink (path);
+
+	if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
+	    goto err;
+
+	memset ((void *)&sockaddr, 0, sizeof(sockaddr));
+	sockaddr.sun_family = AF_UNIX;
+	strcpy (sockaddr.sun_path, path);
+	if (bind (s, (struct sockaddr *)&sockaddr, sizeof(sockaddr)) < 0)
+	    goto err;
+
+	if (listen (s, MAXCONN) < 0)
+	    goto err;
+
+	/* Allocate and fill in i/o channel descriptor. */
+	if ((chan = get_iochan(vxim))) {
+	    chan->vxim = (void *) vxim;
+	    chan->type = IO_UNIX;
+	    chan->datain = s;
+	    chan->dataout = s;
+	    chan->listen_fd = s;
+	    chan->connected = 0;
+	    chan->reference_frame = 1;
+	    chan->rf_p = &vxim->frames[0];
+	    strncpy (chan->path, path, SZ_FNAME);
+	    if (verbose)
+	        fprintf (stderr,
+		    "vximtool: Open to accept input on unix: %s\n", path);
+	    return (chan);
+	}
+err:
+	fprintf (stderr, "vximtool: cannot open socket on port %s, errno=%d\n",
+	    path, errno);
+	if (s)
+	    close (s);
+	return (NULL);
+}
+
+
+/* VX_CONNECTCLIENT -- Called when a client has attempted a connection on
+ * a socket port.  Accept the connection and set up a new i/o channel to
+ * communicate with the new client.
+ */
+#ifdef ANSI_FUNC
+
+static void 
+vx_connectClient (IoChanPtr chan, int *source)
+#else
+
+static void
+vx_connectClient (chan, source)
+IoChanPtr chan;
+int *source;
+#endif
+{
+	register VXimDataPtr vxim = (VXimDataPtr) chan->vxim;
+	register int s;
+
+	/* Accept connection. */
+	if ((s = accept ((int)*source, (struct sockaddr *)0, (int *)0)) < 0)
+	    return;
+/*	
+	if (fcntl (s, F_SETFD, O_RDWR|O_NDELAY) < 0) {
+	    close (s);
+	    return;
+	}
+*/
+
+	/* Allocate and fill in i/o channel descriptor. */
+	FD_SET(s, &allset);
+	chan->datain = s;
+	chan->dataout = s;   
+	chan->connected = 1;
+	chan->reference_frame = 1;
+	chan->rf_p = &vxim->frames[0];
+
+	switch (chan->type) {
+	case IO_INET:
+	    if (verbose) 
+		fprintf (stderr,
+		    "connecting client on port %d\n", chan->port);
+	case IO_UNIX:
+	    if (verbose && chan->type == IO_UNIX) 
+		fprintf (stderr,
+		    "connecting client on %s\n", chan->path);
+	}
+}
+
+
+/* VX_DISCONNECTCLIENT -- Called to close a client connection when EOF is
+ * seen on the input port.  Close the connection and free the channel
+ * descriptor.
+ */
+#ifdef ANSI_FUNC
+
+static void 
+vx_disconnectClient (register IoChanPtr chan)
+#else
+
+static void
+vx_disconnectClient (chan)
+register IoChanPtr chan;
+#endif
+{
+	switch (chan->type) {
+	case IO_INET:
+	    if (verbose) 
+		fprintf (stderr,
+		    "disconnecting client on port %d\n", chan->port);
+	case IO_UNIX:
+	    if (verbose && chan->type == IO_UNIX) 
+		fprintf (stderr,
+		    "disconnecting client on %s\n", chan->path);
+ 	    FD_CLR(chan->datain, &allset); 
+	    close (chan->datain);
+	    chan->datain = chan->dataout = chan->listen_fd;
+	    chan->connected = 0;
+	    break;
+	default:
+	    break;
+	}
+}
+
+
+/* GET_IOCHAN --- Get an i/o channel descriptor.
+ */
+#ifdef ANSI_FUNC
+
+static IoChanPtr 
+get_iochan (register VXimDataPtr vxim)
+#else
+
+static IoChanPtr
+get_iochan (vxim)
+register VXimDataPtr vxim;
+#endif
+{
+	register int i;
+
+	for (i=0;  i < MAX_CLIENTS;  i++)
+	    if (!vxim->chan[i].type)
+		return (&vxim->chan[i]);
+
+	return (NULL);
+}
+
+
+/* VX_IISIO -- File i/o callback procedure, called when there is input
+ * pending on the data stream to the vximtool client.
+ */
+#ifdef ANSI_FUNC
+
+static void 
+vx_iisio (IoChanPtr chan, int *fd_addr, int source)
+#else
+
+static void
+vx_iisio (chan, fd_addr, source)
+IoChanPtr chan;
+int *fd_addr;
+int source;
+#endif
+{
+	register VXimDataPtr vxim = (VXimDataPtr) chan->vxim;
+	register int sum, i;
+	register short *p;
+	int	datain = *fd_addr;
+	int	dataout = chan->dataout;
+	int	ndatabytes, nbytes, n, ntrys=0;
+	struct	iism70 iis;
+	char	buf[SZ_FIFOBUF];
+	static	int errmsg=0, bswap=0;
+
+
+	/* Get the IIS header. */
+	if ((n = iis_read (datain, (char *)&iis, sizeof(iis))) < sizeof(iis)) {
+	    if (n != 0)
+		fprintf (stderr, 
+		   "vximtool: command input read error, n=%d of %d, errno=%d\n",
+			n, sizeof(iis), errno);
+	    if (n <= 0)
+		vx_disconnectClient (chan);
+	    return;
+	} else if (bswap)
+	    bswap2 ((char *)&iis, (char *)&iis, sizeof(iis));
+
+	/* Verify the checksum.  If it fails swap the bytes and try again.
+	 */
+	for (;;) {
+	    for (i=0, sum=0, p=(short *)&iis;  i < 8;  i++)
+		sum += *p++;
+	    if ((sum & 0177777) == 0177777)
+		break;
+
+	    if (ntrys++) {
+		if (!errmsg++) {
+		    fprintf (stderr, "vximtool: bad data header checksum\n");
+		    if (bswap)
+			bswap2 ((char *)&iis, (char *)&iis, sizeof(iis));
+		    fprintf (stderr, "noswap:");
+		    for (i=0, p=(short *)&iis;  i < 8;  i++)
+			fprintf (stderr, " %6o", p[i]);
+		    fprintf (stderr, "\n");
+
+		    bswap2 ((char *)&iis, (char *)&iis, sizeof(iis));
+		    fprintf (stderr, "  swap:");
+		    for (i=0, p=(short *)&iis;  i < 8;  i++)
+			fprintf (stderr, " %6o", p[i]);
+		    fprintf (stderr, "\n");
+		}
+		break;
+
+	    } else {
+		bswap2 ((char *)&iis, (char *)&iis, sizeof(iis));
+		bswap = !bswap;
+	    }
+	}
+
+	ndatabytes = -iis.thingct;
+	if (!(iis.tid & PACKED))
+	    ndatabytes *= 2;
+
+	if (verbose) {
+            fprintf (stderr, "%s: ", (source == IO_FIFO ? "fifo" : 
+				(source == IO_INET ? "inet" : "unix")));
+            fprintf (stderr, 
+               "subunit=%03o tid=%06o nbytes=%6d x=%06o y=%06o z=%06o t=%06o\n",
+               iis.subunit & 077,
+               iis.tid,
+	       ndatabytes,
+               iis.x & 0177777,
+               iis.y & 0177777,
+               iis.z & 0177777,
+               iis.t & 0177777);
+            fflush (stdout);
+	}
+
+
+	switch (iis.subunit & 077) {
+	case FEEDBACK:
+	    /* The feedback unit is used only to clear a frame.
+	     */
+	    chan->reference_frame = decode_frameno (iis.z & 07777);
+	    vx_eraseFrame (vxim, chan->reference_frame);
+#ifdef	HAVE_CDL
+	    if (proxy) {
+	        for (i=0; i < nclients; i++)
+	    	    cdl_clearFrame (cdl[i]);
+	    }
+#endif
+	    if (verbose)
+  	        fprintf (stderr, "erase frame %d - ref = %d\n", 
+		    decode_frameno(iis.z & 0177777), chan->reference_frame);
+	    break;
+
+	case LUT:
+	    /* Data mode writes to the frame lookup tables are not implemented.
+	     * A command mode write to the LUT subunit is used to connect
+	     * image memories up to the RGB channels, i.e., to select the frame
+	     * to be displayed.  We ignore any attempt to assign multiple
+	     * frames to multiple color channels, and just do a simple frame
+	     * select.
+	     */
+	    if (iis.subunit & COMMAND) {
+		int	frame, z, n;
+		short	x[14];
+
+		if (iis_read (datain, (char *)x, ndatabytes) == ndatabytes) {
+		    if (bswap)
+			bswap2 ((char *)x, (char *)x, ndatabytes);
+
+		    z = x[0];
+		    if (!z) z = 1;
+		    for (n=0;  !(z & 1);  z >>= 1)
+			n++;
+
+		    frame = max (1, n + 1);
+		    if (frame > vxim->nframes) {
+			if (frame <= MAX_FRAMES) {
+#ifdef	HAVE_CDL
+	    		    if (proxy) {
+	    		        for (i=0; i < nclients; i++) {
+	    			    cdl_setFBConfig (cdl[i], vxim->fb_configno);
+	    			    cdl_setFrame (cdl[i], frame);
+	    		        }
+	    		    }
+#endif
+			    set_fbconfig (chan, vxim->fb_configno, frame);
+	    		    if (verbose)
+                                fprintf (stderr, "set_fbconfig (%d, %d)\n",
+                                    vxim->fb_configno, frame);
+			} else {
+			    fprintf (stderr, "imtool warning: ");
+			    fprintf (stderr, 
+				"attempt to display nonexistent frame %d\n",
+				frame);
+			    return;
+			}
+		    }
+
+		    vxim->display_frame = frame;
+                    if (verbose) 
+		 	fprintf (stderr, "set_frame (%d)\n", frame);
+		    return;
+		}
+	    }
+
+	case MEMORY:
+	    /* Load data into the frame buffer.  Data is assumed to be byte
+	     * packed.
+	     */
+	    if (iis.tid & IIS_READ) {
+		/* Read from the display.
+		 */
+        	register FrameBufPtr fb;
+		unsigned char *ip, iobuf[SZ_IOBUF];
+		int     nbytes, nleft, n, x, y;
+		long    starttime;
+
+		/* Get the frame to be read from. */
+	        chan->reference_frame = decode_frameno (iis.z & 0177777);
+        	fb = &vxim->frames[chan->reference_frame-1];
+
+		nbytes = ndatabytes;
+		x = iis.x & XYMASK;
+		y = iis.y & XYMASK;
+
+		if (x < 0 || x >= vxim->width || y < 0 || y >= vxim->height) {
+		    fprintf (stderr,
+			"vximtool: attempted read out of bounds on framebuf\n");
+		    fprintf (stderr,
+			"read %d bytes at [%d,%d]\n", nbytes, x, y);
+		    memset ((void *)iobuf, 0, min(SZ_IOBUF,nbytes));
+		} else {
+                    if (verbose) 
+			fprintf (stderr, "read %d bytes at [%d,%d]\n",
+			    nbytes, x, y);
+		    if (keep_raster)
+ 		        bcopy(&fb->framebuf[(y * vxim->width)+x], iobuf,nbytes);
+		    else
+ 		        bzero (iobuf, nbytes);
+#ifdef	HAVE_CDL
+		    if (proxy) {
+		 	unsigned char *pix = (unsigned char *)malloc(SZ_IOBUF);
+			cdl_readSubRaster (cdl[0], x,
+			    (vxim->height-y-max(1, nbytes/vxim->width)),
+			    min(vxim->width, nbytes), 
+			    max(1, nbytes/vxim->width),
+			    &pix);
+ 		        bcopy(pix, iobuf, nbytes);
+			vx_flip ((char *)iobuf, min(vxim->width, nbytes), 
+			    max(1, nbytes/vxim->width));
+ 		        free ((char *)pix);
+		    }
+#endif
+		}
+
+		/* Return the data from the frame buffer. */
+		starttime = time(0);
+		for (nleft=nbytes, ip=iobuf;  nleft > 0;  nleft -= n) {
+		    n = (nleft < SZ_FIFOBUF) ? nleft : SZ_FIFOBUF;
+		    if ((n = iis_write (dataout, ip, n)) <= 0) {
+			if (n < 0 || (time(0) - starttime > IO_TIMEOUT)) {
+			    fprintf (stderr, "IMTOOL: timeout on write\n");
+			    break;
+			}
+		    } else
+			ip += n;
+		}
+
+		return;
+
+	    } else {
+		/* Write to the display.
+		 */
+        	register FrameBufPtr fb;
+		unsigned char *op, iobuf[SZ_IOBUF];
+		int     nbytes, nleft, n, x, y;
+		long    starttime;
+
+		/* Get the frame to be written into (encoded with a bit for
+		 * each frame, 01 is frame 1, 02 is frame 2, 04 is frame 3,
+		 * and so on).
+		 */
+	        chan->reference_frame = decode_frameno (iis.z & 0177777);
+        	fb = &vxim->frames[chan->reference_frame-1];
+
+		nbytes = ndatabytes;
+		x = iis.x & XYMASK;
+		y = iis.y & XYMASK;
+
+		/* Read the data into the frame buffer.
+		 */
+		starttime = time(0);
+		for (nleft=nbytes, op=iobuf;  nleft > 0;  nleft -= n) {
+		    n = (nleft < SZ_FIFOBUF) ? nleft : SZ_FIFOBUF;
+		    if ((n = iis_read (datain, op, n)) <= 0) {
+			if (n < 0 || (time(0) - starttime > IO_TIMEOUT))
+			    break;
+		    } else
+			op += n;
+		}
+
+		if (x < 0 || x >= vxim->width || y < 0 || y >= vxim->height) {
+		    fprintf (stderr,
+		       "vximtool: attempted write out of bounds on framebuf\n");
+		    fprintf (stderr,
+			"write %d bytes at [%d,%d]\n", nbytes, x, y);
+		    bzero ((void *)iobuf, nbytes);
+		} else {
+                    if (verbose) 
+			fprintf (stderr, "write %d bytes at x=%d, y=%d\n",
+			    nbytes, x, y);
+		    if (keep_raster)
+ 		        bcopy(iobuf, &fb->framebuf[(y * vxim->width)+x],nbytes);
+#ifdef	HAVE_CDL
+		    if (proxy) {
+			vx_flip ((char *)iobuf, min(vxim->width, nbytes), 
+			    max(1, nbytes/vxim->width));
+			for (i=0; i < nclients; i++) 
+			    cdl_writeSubRaster (cdl[i], x, 
+			        (vxim->height-y-max(1, nbytes/vxim->width)),
+				min(vxim->width, nbytes), 
+				max(1, nbytes/vxim->width),
+				iobuf);
+		    }
+#endif
+		}
+
+		return;
+	    }
+	    break;
+
+	case WCS:
+	    /* Read or write the WCS for a frame.  The frame number to
+	     * which the WCS applies is passed in Z and the frame buffer
+	     * configuration in T.  The client changes the frame buffer
+	     * configuration in a WCS set.  The WCS text follows the header
+	     * as byte packed ASCII data.
+	     */
+	    if (iis.tid & IIS_READ) {
+		/* Return the WCS for the referenced frame.
+		 */
+		char emsg[SZ_FNAME];
+		char *text;
+		int frame;
+
+		if ((iis.y & 0177777)) {
+		    /* This is a check by the client on our capabilities.
+		     * Return with a version number which can be used by the
+		     * client.  However we write back using the old WCS 
+		     * buffer size for compatability.
+		     */
+		    sprintf (text=emsg, "version=%d", IIS_VERSION);
+		    chan->version = IIS_VERSION;
+
+		    iis_write (dataout, text, SZ_OLD_WCSBUF);
+		    if (verbose) 
+			fprintf (stderr, "version query wcs: %s\n",text);
+
+		} else {
+		    frame = decode_frameno (iis.z & 0177777);
+	            chan->reference_frame = frame;
+
+		    if (chan->rf_p->frameno <= 0)
+		        strcpy (text=emsg, "[NOSUCHFRAME]\n");
+		    else
+		        text = chan->rf_p->wcsbuf;
+
+		    if ((iis.x & 0177777))
+		        iis_write (dataout, text, SZ_WCSBUF);
+		    else
+		        iis_write (dataout, text, SZ_OLD_WCSBUF);
+
+		    if (verbose) {
+                        fprintf (stderr, "query wcs:\n");
+                        write (2, text, SZ_WCSBUF);
+		    }
+		}
+
+	    } else {
+		/* Set the WCS for the referenced frame.
+		 */
+		register CtranPtr ct;
+		int fb_config, frame, new_wcs = 0;
+
+		frame = decode_frameno (iis.z & 0177777);
+		fb_config = (iis.t & 0777) + 1;
+		new_wcs   = (iis.t & 0777);
+
+		/* See if we need to change the frame buffer configuration,
+		 * or allocate a new frame.
+		 */
+		if (fb_config != vxim->fb_configno) {
+		    set_fbconfig (chan, fb_config, frame);
+#ifdef	HAVE_CDL
+		    if (proxy) {
+			for (i=0; i < nclients; i++) {
+	    		    cdl_setFBConfig (cdl[i], fb_config);
+	    		    cdl_setFrame (cdl[i], frame);
+			}
+		    }
+#endif
+		} else if (frame > vxim->nframes && frame < MAX_FRAMES) {
+		    set_fbconfig (chan, vxim->fb_configno, frame);
+#ifdef	HAVE_CDL
+		    if (proxy) {
+			for (i=0; i < nclients; i++) {
+	    		    cdl_setFBConfig (cdl[i], vxim->fb_configno);
+	    		    cdl_setFrame (cdl[i], frame);
+			}
+		    }
+#endif
+		}
+
+		/* Read in and set up the WCS. */
+		chan->reference_frame = frame;
+		memset ((char *)buf, 0, SZ_WCSBUF);
+		if (iis_read (datain, buf, ndatabytes) == ndatabytes)
+		    strncpy (chan->rf_p->wcsbuf, buf,
+			(new_wcs ? SZ_WCSBUF : SZ_OLD_WCSBUF));
+
+		if (verbose) {
+                    fprintf (stderr, "set wcs:  nbytes=%d\n", ndatabytes);
+                    write (2, buf, ndatabytes);
+		}
+
+		strcpy (chan->rf_p->ctran.format, W_DEFFORMAT);
+		chan->rf_p->ctran.imtitle[0] = '\0';
+		chan->rf_p->ctran.valid = 0;
+		ct = wcs_update (vxim, chan->rf_p);
+
+#ifdef	HAVE_CDL
+		if (proxy) {
+		    for (i=0; i < nclients; i++)
+			cdl_setWCS (cdl[i], " ", ct->imtitle, 
+			    ct->a, ct->b, ct->c, ct->d, 
+			    ct->tx, ct->ty, ct->z1, ct->z2, ct->zt);
+		}
+#endif
+
+		/* Add the mapping information.  */
+                add_mapping (vxim, ct, chan->rf_p->wcsbuf,
+                    &vxim->frames[chan->reference_frame-1]);
+	    }
+	    return;
+
+	case IMCURSOR:
+	    /* Read or write the logical image cursor.  This is an extension
+	     * added to provide a high level cursor read facility; this is
+	     * not the same as a low level access to the IIS cursor subunit.
+	     * Cursor reads may be either nonblocking (immediate) or blocking,
+	     * using the keyboard or mouse to terminate the read, and
+	     * coordinates may be returned in either image (world) or frame
+	     * buffer pixel coordinates.
+	     */
+	    if (iis.tid & IIS_READ) {
+		/* Read the logical image cursor.  In the case of a blocking
+		 * read all we do is initiate a cursor read; completion occurs
+		 * when the user hits a key or button.
+		 */
+		float sx, sy;
+
+		if (verbose)
+		    fprintf (stderr, "read cursor position\n");
+		if (iis.tid & IMC_SAMPLE) {
+		    /* Sample the cursor position and return the cursor value
+		     * on the output datastream encoded in a fixed size
+		     * ascii buffer.
+		     */
+		    int   wcs = iis.z;
+
+		    sx = cursor_x;
+        	    sy = cursor_y;
+#ifdef	HAVE_CDL
+		    if (proxy) {
+			char	key = ' ';
+			char	curval[SZ_IMCURVAL], keystr[20];
+
+			cdl_readCursor (cdl[0], 1, &sx, &sy, &key);
+
+        		/* Encode the cursor value. */
+        		if (key == EOF)
+        		    sprintf (curval, "EOF\n");
+        		else {
+        		    if (isprint (key) && !isspace(key)) {
+           		        keystr[0] = key;
+                		keystr[1] = '\0';
+            		    } else
+                		sprintf (keystr, "\\%03o", key);
+
+            		    sprintf (curval, "%10.3f %10.3f %d %s %s\n",
+                	        sx, sy, 1, keystr, "");
+			}
+			iis_write (dataout, curval, sizeof(curval));
+		    } else
+#endif
+		        vx_retCursorVal (chan->dataout, sx, sy, wcs, 0, "");
+
+		} else {
+		    /* Initiate a user triggered cursor read. */
+		    char key = 'q';
+#ifdef	HAVE_CDL
+		    if (proxy) {
+			char	curval[SZ_IMCURVAL], keystr[20];
+
+			cdl_readCursor (cdl[0], 0, &sx, &sy, &key);
+
+        		/* Encode the cursor value. */
+        		if (key == EOF)
+        		    sprintf (curval, "EOF\n");
+        		else {
+        		    if (isprint (key) && !isspace(key)) {
+           		        keystr[0] = key;
+                		keystr[1] = '\0';
+            		    } else
+                		sprintf (keystr, "\\%03o", key);
+
+            		    sprintf (curval, "%10.3f %10.3f %d %s %s\n\0",
+                	        sx, sy, 1, keystr, "");
+			}
+			iis_write (chan->dataout, curval, sizeof(curval));
+		    } else
+#endif
+		        vx_retCursorVal (chan->dataout, 1., 1., 101, key, "");
+		}
+
+	    } else {
+		/* Write (set) the logical image cursor position. */
+		register CtranPtr ct;
+		int sx = iis.x, sy = iis.y;
+		float wx = sx, wy = sy;
+		int wcs = iis.z;
+
+		if (verbose)
+		    fprintf (stderr, "write cursor position: [%d,%d]\n", sx,sy);
+		if (wcs) {
+		    ct = wcs_update (vxim, vxim->df_p);
+		    if (ct->valid) {
+			if (abs(ct->a) > .001)
+			    sx = (wx - ct->tx) / ct->a;
+			if (abs(ct->d) > .001)
+			    sy = (wy - ct->ty) / ct->d;
+		    }
+		}
+
+        	cursor_x = sx;
+        	cursor_y = sy;
+#ifdef	HAVE_CDL
+		if (proxy)
+		    cdl_setCursor (cdl[0], sx, sy, wcs);
+#endif
+	    }
+	    return;
+
+	default:
+	    /* Ignore unsupported command input.
+	     */
+	    fprintf (stderr, "unsupported input: subunit=%03o\n", 
+		iis.subunit & 077);
+	    break;
+	}
+
+	/* Discard any data following the header. */
+	if (!(iis.tid & IIS_READ))
+	    for (nbytes = ndatabytes;  nbytes > 0;  nbytes -= n) {
+		n = (nbytes < SZ_FIFOBUF) ? nbytes : SZ_FIFOBUF;
+		if ((n = iis_read (datain, buf, n)) <= 0)
+		    break;
+	    }
+}
+
+
+/* SET_FBCONFIG -- Set the frame buffer configuration, or add additional
+ * frames to the current configuration.
+ */
+#ifdef ANSI_FUNC
+
+static void 
+set_fbconfig (IoChanPtr chan, int config, int frame)
+#else
+
+static void
+set_fbconfig (chan, config, frame)
+IoChanPtr chan;
+int config;
+int frame;
+#endif
+{
+	register VXimDataPtr vxim = (VXimDataPtr) chan->vxim;
+	register FrameBufPtr fb = &vxim->frames[frame-1];
+	register int i;
+
+	if (config != vxim->fb_configno) {
+	    /* Change the frame buffer configuration. */
+	    vx_initialize (vxim, config,
+		max (vxim->fb_config[config-1].nframes, frame), 1);
+
+	} else if (frame > vxim->nframes) {
+	    /* Add additional frames.  */
+	    for (i=1;  i <= frame;  i++) {
+		fb = &vxim->frames[i-1];
+		if (fb->frameno != i)
+		    vx_initFrame (vxim, i, frame, &vxim->fb_config[config-1]);
+	    }
+	}
+
+	chan->reference_frame = frame;
+}
+
+
+/* DECODE_FRAMENO -- Decode encoded IIS register frame number.
+ */
+#ifdef ANSI_FUNC
+
+static int
+decode_frameno (register int z)
+#else
+
+static int
+decode_frameno (z)
+register int	z;
+#endif
+{
+	register int	n;
+
+	/* Get the frame number, encoded with a bit for each frame, 01 is
+	 * frame 1, 02 is frame 2, 04 is frame 3, and so on.
+	 */
+	if (!z) z = 1;
+	for (n=0;  !(z & 1);  z >>= 1)
+	    n++;
+
+	return (max (1, n + 1));
+}
+
+
+/* BSWAP2 - Move bytes from array "a" to array "b", swapping successive
+ * pairs of bytes.  The two arrays may be the same but may not be offset
+ * and overlapping.
+ */
+#ifdef ANSI_FUNC
+
+static void
+bswap2 (
+    char *a,
+    char *b,		/* input array			*/
+    int nbytes		/* number of bytes to swap	*/
+)
+#else
+
+static void
+bswap2 (a, b, nbytes)
+char 	*a, *b;		/* input array			*/
+int	nbytes;		/* number of bytes to swap	*/
+#endif
+{
+	register char *ip=a, *op=b, *otop;
+	register unsigned temp;
+
+	/* Swap successive pairs of bytes.
+	 */
+	for (otop = op + (nbytes & ~1);  op < otop;  ) {
+	    temp  = *ip++;
+	    *op++ = *ip++;
+	    *op++ = temp;
+	}
+
+	/* If there is an odd byte left, move it to the output array.
+	 */
+	if (nbytes & 1)
+	    *op = *ip;
+}
+
+
+/* VX_RETCURSORVAL -- Return the cursor value on the output datastream to
+ * the client which requested the cursor read.
+ */
+#ifdef ANSI_FUNC
+
+static void 
+vx_retCursorVal (
+    register int dataout,
+    float sx,
+    float sy,			/* cursor screen coordinates */
+    int wcs,			/* nonzero if WCS coords desired */
+    int key,			/* keystroke used as trigger */
+    char *strval		/* optional string value */
+)
+#else
+
+static void
+vx_retCursorVal (dataout, sx, sy, wcs, key, strval)
+register int dataout;
+float	sx, sy;			/* cursor screen coordinates */
+int	wcs;			/* nonzero if WCS coords desired */
+int	key;			/* keystroke used as trigger */
+char	*strval;		/* optional string value */
+#endif
+{
+	char curval[SZ_IMCURVAL];
+	char keystr[20];
+
+        /* If running SERVER in interactive mode, allow the user to type
+         * in the cursor value on the standard input.
+         */
+        if (interactive) {
+            printf ("enter cursor value string (x y wcs key str): ");
+            fflush (stdout);
+            if (fgets (curval, SZ_IMCURVAL, stdin) != NULL)
+                goto ret;
+        }
+
+        /* Encode the cursor value. */
+        if (key == EOF)
+            sprintf (curval, "EOF\n");
+        else {
+            if (isprint (key) && !isspace(key)) {
+                keystr[0] = key;
+                keystr[1] = '\0';
+            } else
+                sprintf (keystr, "\\%03o", key);
+
+            sprintf (curval, "%10.3f %10.3f %d %s %s\n",
+                sx, sy, wcs, keystr, strval);
+        }
+ret:
+	fprintf (stderr, "%s", curval);
+
+	/* Send it to the client program and terminate cursor mode. */
+	write (dataout, curval, sizeof(curval));
+}
+
+
+/* WCS_UPDATE -- Load the screen WCS, if not yet validated, from the user
+ * wcs file, if any.
+ *
+ * File format (two lines):
+ *
+ *	image title (imtool header label string)\n
+ *	a b c d tx ty z1 z2 zt
+ *
+ * The WCS text is passed in via the data stream as a write to the subunit
+ * WCS and left in the buffer "wcsbuf".
+ */
+#ifdef ANSI_FUNC
+
+static CtranPtr 
+wcs_update (register VXimDataPtr vxim, FrameBufPtr fr)
+#else
+
+static CtranPtr 
+wcs_update (vxim, fr)
+register VXimDataPtr vxim;
+FrameBufPtr fr;
+#endif
+{
+	register CtranPtr ct = &fr->ctran;
+	char buf[1024], *format;
+
+	/* Get the new WCS. */
+	if (!ct->valid) {
+	    fr->label[0] = '\0';
+	    ct->zt = W_UNITARY;
+
+	    /* Attempt to read the WCS and set up a unitary transformation
+	     * if the information cannot be read.
+	     */
+	    if (sscanf (fr->wcsbuf, "%[^\n]\n%f%f%f%f%f%f%f%f%d",
+		buf, &ct->a, &ct->b, &ct->c, &ct->d, &ct->tx, &ct->ty,
+		&ct->z1, &ct->z2, &ct->zt) < 7) {
+
+		if (fr->wcsbuf[0])
+		    fprintf (stderr, "vximtool: error decoding WCS\n");
+
+		strncpy (ct->imtitle, "[NO WCS]\n", SZ_IMTITLE);
+		ct->a  = ct->d  = 1;
+		ct->b  = ct->c  = 0;
+		ct->tx = ct->ty = 0;
+		ct->zt = W_UNITARY;
+
+	    } else
+		strncpy (ct->imtitle, buf, SZ_IMTITLE);
+
+	    ct->valid++;
+	}
+
+	/* Determine best format for wcs output. */
+	if (ct->valid && ct->zt == W_LINEAR) {
+	    float   z1, z2, zrange;
+	    z1 = ct->z1;
+	    z2 = ct->z2;
+	    zrange = (z1 > z2) ? z1 - z2 : z2 - z1;
+	    if (zrange < 100.0 && (abs(z1) + abs(z2)) / 2.0 < 200.0)
+		format = " %7.2f %7.2f %7.3f%c";
+	    else if (zrange > 99999.0 || (abs(z1) + abs(z2)) / 2.0 > 99999.0)
+		format = " %7.2f %7.2f %7.3g%c";
+	    else
+		format = W_DEFFORMAT;
+	} else
+	    format = " %7.2f %7.2f %7.0f%c";
+
+	strcpy (ct->format, format);
+	return (ct);
+}
+
+
+/* VX_INITIALIZE -- Initialize the imaging subsystem.  Read the config file
+ * and create the frame buffers, mappings, and colormaps.
+ */
+#ifdef ANSI_FUNC
+
+static void 
+vx_initialize (register VXimDataPtr vxim, int config, int nframes, int reset)
+#else
+
+static void
+vx_initialize (vxim, config, nframes, reset)
+register VXimDataPtr vxim;
+int config;
+int nframes;
+int reset;
+#endif
+{
+	if (reset) 
+	    get_fbconfig (vxim);
+
+	vxim->fb_configno = config;
+	vxim->nframes = vxim->fb_config[config].nframes;
+	vxim->width = vxim->fb_config[config].width;
+	vxim->height = vxim->fb_config[config].height;
+	vx_initFrame (vxim, vxim->display_frame, nframes,
+	    &vxim->fb_config[config-1]);
+}
+
+
+/* VX_INITFRAME -- Initialize a frame buffer.
+ */
+#ifdef ANSI_FUNC
+
+static void 
+vx_initFrame (register VXimDataPtr vxim, int frame, int nframes, FbConfigPtr config)
+#else
+
+static void
+vx_initFrame (vxim, frame, nframes, config)
+register VXimDataPtr vxim;
+int frame, nframes;
+FbConfigPtr config;
+#endif
+{
+        register FrameBufPtr fb = &vxim->frames[frame-1];
+
+        if (frame < 1 || frame > MAX_FRAMES)
+            return;
+
+        /* Create the frame buffer. */
+        fb->frameno = frame;
+	if (keep_raster) {
+	    if (fb->framebuf) 
+		free (fb->framebuf);
+	    fb->framebuf = (char *) malloc (config->width * config->height);
+	}
+	vxim->width = config->width;
+	vxim->height = config->height;
+	vxim->nframes = nframes;
+}
+
+/* VX_ERASEFRAME -- Erase a frame.
+ */
+#ifdef ANSI_FUNC
+
+static void 
+vx_eraseFrame (register VXimDataPtr vxim, int frame)
+#else
+
+static void
+vx_eraseFrame (vxim, frame)
+register VXimDataPtr vxim;
+int frame;
+#endif
+{
+        register FrameBufPtr fb = &vxim->frames[frame-1];
+ 
+	if (keep_raster)
+	    bzero (fb->framebuf, vxim->width * vxim->height);
+}
+
+
+/* GET_FBCONFIG -- Read the XIMTOOL startup file to get the set of possible
+ * frame buffer sizes.
+ *
+ * File format:         configno nframes width height [extra fields]
+ *      e.g.,                   1  2  512  512
+ *                              2  2  800  800
+ *                              3  1 1024 1024          # comment
+ */
+#ifdef ANSI_FUNC
+
+static void 
+get_fbconfig (register VXimDataPtr vxim)
+#else
+
+static void
+get_fbconfig (vxim)
+register VXimDataPtr vxim;
+#endif
+{
+	register char	*ip;
+	register FILE	*fp = NULL;
+	int	config, nframes, width, height, i;
+	char	lbuf[SZ_LINE+1], *fname;
+	static char *fb_paths[] = {
+		"/usr/local/lib/imtoolrc",
+		"/opt/local/lib/imtoolrc",
+		"/iraf/iraf/dev/imtoolrc",
+		"/local/lib/imtoolrc",
+		"/usr/iraf/dev/imtoolrc",
+		"/usr/local/iraf/dev/imtoolrc",
+		NULL};
+
+	/* Initialize the config table. */
+	vxim->fb_configno = 1;
+	for (i=0;  i < MAX_FBCONFIG;  i++) {
+	    vxim->fb_config[i].nframes = 1;
+	    vxim->fb_config[i].width = DEF_FRAME_WIDTH;
+	    vxim->fb_config[i].height = DEF_FRAME_HEIGHT;
+	}
+
+	/* Now add in some defaults for commonly used sizes based on the
+ 	 * standard IRAF imtoolrc file, we'll avoid any instrument specific
+	 * configurations.
+	 */
+	vxim->fb_config[0].width = vxim->fb_config[0].height =  512;
+	vxim->fb_config[1].width = vxim->fb_config[1].height =  800;
+	vxim->fb_config[2].width = vxim->fb_config[2].height = 1024;
+	vxim->fb_config[3].width = vxim->fb_config[3].height = 1600;
+	vxim->fb_config[4].width = vxim->fb_config[4].height = 2048;
+	vxim->fb_config[5].width = vxim->fb_config[5].height = 4096;
+
+	/* Attempt to open the config file. */
+	if ((fname=getenv(FBCONFIG_ENV1)) || (fname=getenv(FBCONFIG_ENV2)))
+	    fp = fopen (fname, "r");
+	if (!fp && (fname = getenv ("HOME"))) {
+	    sprintf (lbuf, "%s/%s", fname, FBCONFIG_1);
+	    fp = fopen (fname = lbuf, "r");
+	    if (fp) {
+	        vxim->imtoolrc = (char *) calloc (strlen(fname+1),sizeof(char));
+		strncpy (vxim->imtoolrc, fname, strlen(fname));
+	    }
+	}
+	if (!fp)
+	    fp = fopen (fname = vxim->imtoolrc, "r");
+ 	for (i=0; !fp && fb_paths[i]; i++) {
+	    if ((fp = fopen (fname = fb_paths[i], "r"))) {
+	        vxim->imtoolrc = (char *) calloc (strlen(fb_paths[i]+1),
+		    sizeof(char));
+		strncpy (vxim->imtoolrc, fb_paths[i],strlen(fb_paths[i]));
+		break;
+	    }
+	}
+	if (!fp) {
+	    fprintf (stderr, 
+		"Warning: No frame buffer configuration file found.\n");
+	    return;
+	}
+
+
+	/* Scan the frame buffer configuration file.
+	 */
+	while (fgets (lbuf, SZ_LINE, fp) != NULL) {
+	    /* Skip comment lines and blank lines. */
+	    for (ip=lbuf;  *ip == ' ' || *ip == '\t';  ip++)
+		;
+	    if (*ip == '\n' || *ip == '#')
+		continue;
+	    if (!isdigit (*ip))
+		continue;
+	    switch (sscanf (ip, "%d%d%d%d", &config,&nframes,&width,&height)) {
+	    case 4:
+		break;			/* normal case */
+	    case 3:
+		height = width;		/* default to square format */
+		break;
+	    default:
+		fprintf (stderr, "vximtool: bad config `%s'\n", ip);
+		continue;
+	    }
+
+	    nframes = max (1, nframes);
+	    width   = max (1, width);
+	    height  = max (1, height);
+
+	    /* Since the frame buffer is stored in a memory pixrect
+	     * (effectively), the line length should be an integral number
+	     * of 16 bit words.
+	     */
+	    if (width & 1) {
+		fprintf (stderr, "imtool warning: fb config %d [%d-%dx%d] - ",
+		    config, nframes, width, height);
+		fprintf (stderr, "frame width should be even, reset to %d\n",
+		    --width);
+	    }
+
+	    config = max(1, min(MAX_FBCONFIG, config)) - 1;
+	    vxim->fb_config[config].nframes = nframes;
+	    vxim->fb_config[config].width   = width;
+	    vxim->fb_config[config].height  = height;
+	}
+
+	fclose (fp);
+}
+
+
+
+/* USAGE -- Print a list of command-line options.
+ */
+#ifdef ANSI_FUNC
+
+static void 
+Usage (void)
+#else
+
+static void
+Usage ()
+#endif
+{
+        fprintf (stderr, "Usage:\n\n");
+        printoption ("    vximtool");
+        printoption ("[-background]");             /* run in background  */
+        printoption ("[-config <num>]");           /* initial config     */
+        printoption ("[-fifo <pipe>]");            /* fifo pipe          */
+        printoption ("[-fifo_only]");              /* use fifo only      */
+        printoption ("[-help]");                   /* Print help         */
+        printoption ("[-i]");                      /* interactive        */
+        printoption ("[-imtoolrc <file>]");        /* fbconfig file      */
+        printoption ("[-inet_only | -port_only]"); /* use inet only      */
+        printoption ("[-noraster]");          	   /* don't save pix     */
+        printoption ("[-nframes <num>]");          /* # of frames        */
+        printoption ("[-port <num>]");             /* inet port          */
+        printoption ("[-proxy]");             	   /* run a proxy server */
+        printoption ("[-verbose]");           	   /* verbose output     */
+        printoption ("[-unix <name>]");            /* unix socket        */
+        printoption ("[-unix_only]");              /* use unix only      */
+        fprintf (stderr,"\n");
+}
+
+
+/* PRINTOPTION -- Pretty-print an option string.
+ */
+static int cpos = 0;
+#ifdef ANSI_FUNC
+
+static void 
+printoption (char *st)
+#else
+
+static void
+printoption(st)
+char    *st;
+#endif
+{
+        if (strlen(st) + cpos > 78) {
+            fprintf (stderr,"\n\t");
+            cpos = 8;
+        }
+        fprintf (stderr,"%s ",st);
+        cpos = cpos + strlen(st) + 1;
+}
+
+
+#ifdef	HAVE_CDL
+/* VX_FLIP -- Reverse order of lines in raster.
+ */
+
+#ifdef ANSI_FUNC
+
+static void
+vx_flip (char *buffer, int nx, int ny)
+#else
+
+static void
+vx_flip (buffer, nx, ny)
+char   *buffer;
+int     nx;
+int     ny;
+#endif
+{
+        register int    i, j, v;
+        register char  *buff1, *buff2;
+
+        for (i = 0; i < ny / 2; i++) {
+            buff1 = &buffer[i*nx];
+            buff2 = &buffer[(ny-1-i)*nx];
+            for (j = 0; j < nx; j++) {
+                v = *buff1;
+                *(buff1++) = *buff2;
+                *(buff2++) = v;
+            }
+        }
+}
+#endif
+
+
+/* ADD_MAPPING --  Add a mapping for the current frame.  
+ *
+ * File format (two lines):
+ *
+ *	image title (imtool header label string)\n
+ *	a b c d tx ty z1 z2 zt \n
+ *	region_name sx sy snx sny dx dy dnx dny\n
+ *	object_ref
+ *
+ * The WCS text is passed in via the data stream as a write to the subunit
+ * WCS and left in the buffer "wcsbuf".  Mapping information is parsed 
+ * elsewhere if needed, our only purpose here is to extract the frame WCS.
+ */
+
+static void
+add_mapping (vxim, ctran, wcsbuf, fr)
+register VXimDataPtr vxim;
+CtranPtr ctran;
+char	*wcsbuf;
+FrameBufPtr fr;
+{
+	register MappingPtr mp = &fr->mapping[fr->nmaps];
+        register CtranPtr   ct = &mp->ctran;
+	register int i, j;
+	char buf[SZ_WCSBUF], *format;
+
+        /* Attempt to read the WCS and set up a unitary transformation
+         * if the information cannot be read.
+         */
+        if (sscanf (wcsbuf, "%[^\n]\n%f%f%f%f%f%f%f%f%d",
+            buf, &ct->a, &ct->b, &ct->c, &ct->d, &ct->tx, &ct->ty,
+            &ct->z1, &ct->z2, &ct->zt) < 7) {
+
+            if (wcsbuf[0])
+                fprintf (stderr, "vximtool: error decoding WCS\n");
+
+            strncpy (ct->imtitle, "[NO WCS]\n", SZ_IMTITLE);
+            ct->a  = ct->d  = 1;
+            ct->b  = ct->c  = 0;
+            ct->tx = ct->ty = 0;
+            ct->zt = W_UNITARY;
+        } else
+            strncpy (ct->imtitle, buf, SZ_IMTITLE);
+
+        ct->zt = W_UNITARY;
+        ct->valid = 1;
+
+
+	mp->ref[0] = '\0';
+	mp->region[0] = '\0';
+
+	/* Skip over the first two lines of WCS data.
+	 */
+	strcpy (buf, wcsbuf);
+	for (i=0, j=0; j < 2 && buf[i]; i++)
+	    if (buf[i] == '\n')
+	        j++;
+
+	/* Attempt to read the mapping.
+	 */
+	mp->id = mp->regid = ++objid;
+	if (sscanf (&buf[i], "%s%f%f%d%d%d%d%d%d\n%s\n",
+	    mp->region, &mp->sx, &mp->sy, &mp->snx, &mp->sny, 
+	    &mp->dx, &mp->dy, &mp->dnx, &mp->dny, mp->ref) < 10) {
+
+	        if (!wcsbuf[0])
+	            fprintf (stderr, "vximtool: error decoding WCS mapping\n");
+	        strncpy (mp->ref, "none", SZ_IMTITLE);
+
+	        mp->sx  = 1.0;
+	        mp->sy  = 1.0;
+	        mp->snx = vxim->width;
+	        mp->sny = vxim->height;
+	        mp->dx  = 1;
+	        mp->dy  = 1;
+	        mp->dnx = vxim->width;
+	        mp->dny = vxim->height;
+	}
+	memmove (ctran, &mp->ctran, sizeof (Ctran));
+
+	fr->nmaps++;
+}
+
+
+/* PRINT_MAPPINGS -- Debug routine to print all mappings on a frame.
+ */
+print_mappings (fr)
+FrameBufPtr fr;
+{
+	MappingPtr mp;
+	register int i;
+
+	if (fr->nmaps == 0) printf ("No mappings for frame %d\n", fr->frameno);
+	for (i=0; i < fr->nmaps; i++) {
+	    mp = &fr->mapping[i];
+	    printf ("Mapping %d frame=%d:\n", fr->nmaps, fr->frameno);
+	    printf ("\t%s %f %f %d %d %d %d %d %d\n\t%s\n", 
+	        mp->region, mp->sx, mp->sy, mp->snx, mp->sny, 
+	        mp->dx, mp->dy, mp->dnx, mp->dny, mp->ref);
+	}
+}
+
+
+/* IIS_READ -- Read exactly "n" bytes from a descriptor. 
+ */
+
+#ifdef ANSI_FUNC
+static int                                   
+iis_read (int fd, void *vptr, int nbytes)
+
+#else
+static int                                   
+iis_read (fd, vptr, nbytes)
+int 	fd; 
+void 	*vptr; 
+int 	nbytes;
+#endif
+{
+        char    *ptr = vptr;
+        int 	nread = 0, nleft = nbytes, nb = 0;
+
+        while (nleft > 0) {
+            if ( (nb = read(fd, ptr, nleft)) < 0) {
+                if (errno == EINTR)
+                    nb = 0;          	/* and call read() again */
+                else
+                    return(-1);
+            } else if (nb == 0)
+                break;                  /* EOF */
+            nleft -= nb;
+            ptr   += nb;
+            nread += nb;
+        }
+        return (nread);              	/* return no. of bytes read */
+}
+
+
+/* IIS_WRITE -- Write exactly "n" bytes to a descriptor. 
+ */
+#ifdef ANSI_FUNC
+static int                                   
+iis_write (int fd, void *vptr, int nbytes)
+
+#else
+
+static int                                   
+iis_write (fd, vptr, nbytes)
+int 	fd; 
+void 	*vptr; 
+int 	nbytes;
+#endif
+
+{
+        char 	*ptr = vptr;
+        int     nwritten = 0,  nleft = nbytes, nb = 0;
+
+        while (nleft > 0) {
+            if ( (nb = write(fd, ptr, nleft)) <= 0) {
+                if (errno == EINTR)
+                    nb = 0;           	/* and call write() again */
+                else
+                    return(-1);         /* error */
+            }
+            nleft    -= nb;
+            ptr      += nb;
+            nwritten += nb;
+        }
+        return (nwritten);
+}