Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 725 insertions, 0 deletions

diff --git a/nx-X11/programs/xterm/vms.c b/nx-X11/programs/xterm/vms.c
new file mode 100644
index 000000000..155cdb41b
--- /dev/null
+++ b/nx-X11/programs/xterm/vms.c
@@ -0,0 +1,725 @@
+/* $XFree86: xc/programs/xterm/vms.c,v 1.2 2003/10/27 01:07:58 dickey Exp $ */
+
+/*  vms.c
+ *
+ * This module contains the VMS version of the routine SPAWN (from the module
+ * MAIN.C) and the routines that do IO to the pseudo terminal.
+ *
+ * Modification History:
+ * Stephan Jansen 1-Mar-1990  Original version
+ * Hal R. Brand   5-Sep-1990  Added code to propagate DECW$DISPLAY
+ * Aaron Leonard 11-Sep-1990  Fix string descriptor lengths
+ * Stephan Jansen 2-Dec-1991  Modify to use new Pseudo terminal drivers
+ *                            (patterned after photo.c by Forrest A. Kenney)
+ * Patrick Mahan  7-Jan-1991  Removed reference to <dvidef.h> from VMS.C
+ *			      Forced device type to be VT102 since that is
+ *			      what we are emulating.
+ */
+
+#include <libdef.h>
+#include <lnmdef.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include "xterm.h"
+#include "data.h"
+#include "vms.h"
+
+#define PTD$C_SEND_XON		0	/* Pseudo Terminal Driver event      */
+#define PTD$C_SEND_BELL		1
+#define PTD$C_SEND_XOFF 	2
+#define PTD$C_STOP_OUTPUT	3
+#define PTD$C_RESUME_OUTPUT 	4
+#define PTD$C_CHAR_CHANGED 	5
+#define PTD$C_ABORT_OUTPUT 	6
+#define PTD$C_START_READ 	7
+#define PTD$C_MIDDLE_READ 	8
+#define PTD$C_END_READ 		9
+#define PTD$C_ENABLE_READ 	10
+#define PTD$C_DISABLE_READ 	11
+#define PTD$C_MAX_EVENTS 	12
+
+#define	BUFFERS		        6
+#define	PAGE			512
+
+typedef struct	tt_buffer
+{
+unsigned int	flink;
+unsigned int	blink;
+short	int	status;
+short	int	length;
+char		data[VMS_TERM_BUFFER_SIZE];
+} TT_BUF_STRUCT;
+
+TT_BUF_STRUCT		*tt_w_buff;
+struct	q_head		 _align(QUADWORD)	buffer_queue = (0,0);
+struct	q_head		 _align(QUADWORD)	read_queue = (0,0);
+
+static char          tt_name[64];
+static $DESCRIPTOR   (tt_name_desc, &tt_name);
+
+static char          ws_name[64];
+static $DESCRIPTOR   (ws_name_desc, &ws_name);
+
+static struct        tt_char {
+   char        class;
+   char        type;
+   short int   page_width;
+   char        characteristics[3];
+   char        length;
+   int         extended;
+ } tt_mode, tt_chars, orig_tt_chars;
+
+struct mem_region
+{
+  TT_BUF_STRUCT *start;
+  TT_BUF_STRUCT *end;
+} ret_addr;
+
+int read_stopped = FALSE;
+int write_stopped = FALSE;
+
+int tt_width;
+int tt_length;
+int tt_changed;
+int tt_pasting=FALSE;         /* drm */
+int tt_new_output=FALSE;      /* Cleared by flushlog(), set whenever something new
+   goes to the screen through tt_write */
+
+int trnlnm(char *in,int id,char *out);
+int tt_write(char *tt_write_buf,int size);
+void spawn (void);
+
+static void tt_echo_ast(TT_BUF_STRUCT *buff_addr);
+static void tt_read_ast(TT_BUF_STRUCT *buff_addr);
+
+/*
+static void tt_start_read(void);
+*/
+void tt_start_read(void);
+int tt_read(char *buffer);
+static void send_xon(void);
+static void send_xoff(void);
+static void send_bell(void);
+static void char_change(void);
+static void freeBuff (TT_BUF_STRUCT *buff_addr);
+TT_BUF_STRUCT *getBuff(void);
+static void CloseDown(int exit_status);
+static void mbx_read_ast(void);
+static void mbx_read(void);
+
+
+
+#define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
+{ strlen(string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
+
+int trnlnm(char *in, int id, char *out)
+{
+  int status, num, len, attr = LNM$M_CASE_BLIND, foo = id;
+  short outlen;
+  struct itemlist
+    {
+      short buffer_length;
+      short item_code;
+      char  *buffer_addr;
+      int   *return_length;
+    } itmlst[] =
+      {
+	4  , LNM$_INDEX    , &foo, 0,
+	255, LNM$_STRING   , out , &outlen,
+	4  , LNM$_MAX_INDEX, &num, &len,
+	0  , 0
+	};
+  DESCRIPTOR(lognam,in);
+  DESCRIPTOR(tabnam,"LNM$DCL_LOGICAL");
+
+  status = sys$trnlnm(&attr,&tabnam,&lognam,0,itmlst);
+  if(status != SS$_NORMAL) return(-1);   /* error status */
+  out[outlen] = 0;         /* terminate the output string */
+  return(++num);         /* return number of translations */
+}
+
+static int           pty;
+static int           Xsocket;
+
+void spawn (void)
+{
+  int                  status;
+  static $DESCRIPTOR   (dtime, "0 00:00:00.01");
+  static int           delta[2];
+  register TScreen     *screen = &term->screen;
+  static struct IOSB   iosb;
+  static unsigned int  flags;
+  static unsigned int  uic;
+  static char          imagename[64];
+  static int           privs;
+  static $DESCRIPTOR(device, "FTA0:");
+  static int           type;
+  static int           class;
+  static int           devdepend;
+  static int           mem_size;
+  int                  i;
+
+  /* if pid and mbx_chan are nonzero then close them in CloseDown() */
+  pid = 0;
+  mbx_chan = 0;
+
+  status = SYS$EXPREG (BUFFERS, &ret_addr, 0, 0);
+  if(!(status & SS$_NORMAL)) lib$signal(status);
+
+  tt_w_buff = (char *)ret_addr.end - PAGE + 1;
+
+  /* use one buffer for writing, the reset go in the free buffer queue */
+  for(i=0; i < BUFFERS-1; i++)
+    {
+      freeBuff((char *)ret_addr.start +i*PAGE);
+    }
+
+  /* avoid double MapWindow requests, for wm's that care... */
+  XtSetMappedWhenManaged( screen->TekEmu ? XtParent(tekWidget) :
+			 XtParent(term), False );
+  /* Realize the Tek or VT widget, depending on which mode we're in.
+     If VT mode, this calls VTRealize (the widget's Realize proc) */
+  XtRealizeWidget (screen->TekEmu ? XtParent(tekWidget) :
+		   XtParent(term));
+
+  /* get the default device characteristics of the pseudo terminal */
+
+  itemlist[0].buflen      = 4;
+  itemlist[0].code        = DVI$_DEVTYPE;
+  itemlist[0].buffer      = &type;
+  itemlist[0].return_addr = &tt_name_desc.dsc$w_length;
+
+  itemlist[1].buflen      = 4;
+  itemlist[1].code        = DVI$_DEVCLASS;
+  itemlist[1].buffer      = &class;
+  itemlist[1].return_addr = &tt_name_desc.dsc$w_length;
+
+  itemlist[2].buflen      = 4;
+  itemlist[2].code        = DVI$_DEVDEPEND;
+  itemlist[2].buffer      = &devdepend;
+  itemlist[2].return_addr = &tt_name_desc.dsc$w_length;
+
+  itemlist[3].buflen      = 4;
+  itemlist[3].code        = DVI$_DEVDEPEND2;
+  itemlist[3].buffer      = &tt_chars.extended;
+  itemlist[3].return_addr = &tt_name_desc.dsc$w_length;
+
+  itemlist[4].buflen      = 0;
+  itemlist[4].code        = 0;
+
+
+  status = sys$getdviw(0,0,&device,&itemlist,&iosb,0,0,0);
+  if(!(status & SS$_NORMAL)) lib$signal(status);
+  if(!(iosb.status & SS$_NORMAL)) lib$signal(iosb.status);
+
+  tt_chars.type        = DT$_VT102; /* XTerm supports VT102 mode */
+  tt_chars.class       = class;
+  tt_chars.page_width  = screen->max_col+1;
+  tt_chars.length      = screen->max_row+1;
+
+  /* copy the default char's along with the created window size */
+
+  bcopy(&devdepend, &tt_chars.characteristics, 3);
+
+  tt_chars.extended |= TT2$M_ANSICRT | TT2$M_AVO | TT2$M_DECCRT;
+
+
+  /* create the pseudo terminal with the proper char's */
+  status = ptd$create(&tt_chan,0,&tt_chars,12,0,0,0,&ret_addr);
+  if(!(status & SS$_NORMAL)) lib$signal(status);
+
+
+  /* get the device name of the Pseudo Terminal */
+
+  itemlist[0].buflen      = 64;
+  itemlist[0].code        = DVI$_DEVNAM;
+  itemlist[0].buffer      = &tt_name;
+  itemlist[0].return_addr = &tt_name_desc.dsc$w_length;
+
+  /* terminate the list */
+  itemlist[1].buflen      = 0;
+  itemlist[1].code        = 0;
+
+  status = sys$getdviw(0,tt_chan,0,&itemlist,&iosb,0,0,0);
+  if(!(status & SS$_NORMAL)) CloseDown(status);
+  if(!(iosb.status & SS$_NORMAL)) CloseDown(iosb.status);
+
+  /*
+   * set up AST's for XON, XOFF, BELL and characteristics change.
+   */
+
+  status = ptd$set_event_notification(tt_chan,&send_xon,0,0,PTD$C_SEND_XON);
+  if(!(status & SS$_NORMAL)) CloseDown(status);
+
+  status = ptd$set_event_notification(tt_chan,&send_xoff,0,0,PTD$C_SEND_XOFF);
+  if(!(status & SS$_NORMAL)) CloseDown(status);
+
+  status = ptd$set_event_notification(tt_chan,&send_bell,0,0,PTD$C_SEND_BELL);
+  if(!(status & SS$_NORMAL)) CloseDown(status);
+
+  status = ptd$set_event_notification(tt_chan,&char_change,0,0,PTD$C_CHAR_CHANGED);
+  if(!(status & SS$_NORMAL)) CloseDown(status);
+
+  /* create a mailbox for the detached process to detect hangup */
+
+  status = sys$crembx(0,&mbx_chan,ACC$K_TERMLEN,0,255,0,0);
+  if(!(status & SS$_NORMAL)) CloseDown(status);
+
+
+  /*
+   * get the device unit number for created process completion
+   * status to be sent to.
+   */
+
+  itemlist[0].buflen      = 4;
+  itemlist[0].code        = DVI$_UNIT;
+  itemlist[0].buffer      = &mbxunit;
+  itemlist[0].return_addr = 0;
+
+  /* terminate the list */
+  itemlist[1].buflen      = 0;
+  itemlist[1].code        = 0;
+
+  status = sys$getdviw(0,mbx_chan,0,&itemlist,&iosb,0,0,0);
+  if(!(status & SS$_NORMAL)) CloseDown(status);
+  if(!(iosb.status & SS$_NORMAL)) CloseDown(iosb.status);
+
+
+  tt_start_read();
+
+  /*
+   * find the current process's UIC so that it can be used in the
+   * call to sys$creprc
+   */
+  itemlist[0].buflen = 4;
+  itemlist[0].code = JPI$_UIC;
+  itemlist[0].buffer = &uic;
+  itemlist[0].return_addr = 0;
+
+  /* terminate the list */
+  itemlist[1].buflen      = 0;
+  itemlist[1].code        = 0;
+
+  status = sys$getjpiw(0,0,0,&itemlist,0,0,0);
+  if(!(status & SS$_NORMAL)) CloseDown(status);
+
+  /* Complete a descriptor for the WS (DECW$DISPLAY) device */
+
+  trnlnm("DECW$DISPLAY",0,ws_name);
+  ws_name_desc.dsc$w_length = strlen(ws_name);
+
+  /* create the process */
+  /*  Set sys$error to be the WS (DECW$DISPLAY) device. LOGINOUT  */
+  /*  has special code for DECWINDOWS that will:                  */
+  /*    1) do a DEFINE/JOB DECW$DISPLAY 'f$trnlnm(sys$error)'     */
+  /*    2) then redefine SYS$ERROR to match SYS$OUTPUT!           */
+  /*  This will propogate DECW$DISPLAY to the XTERM process!!!    */
+  /*  Thanks go to Joel M Snyder who posted this info to INFO-VAX */
+
+  flags = PRC$M_INTER | PRC$M_NOPASSWORD | PRC$M_DETACH;
+  status = sys$creprc(&pid,&image,&tt_name_desc,&tt_name_desc,
+		      &ws_name_desc,0,0,0,4,uic,mbxunit,flags);
+  if(!(status & SS$_NORMAL)) CloseDown(status);
+
+
+  /* hang a read on the mailbox waiting for completion */
+  mbx_read();
+
+
+/* set time value and schedule a periodic wakeup (every 1/100 of a second)
+ * this is used to prevent the controlling process from using up all the
+ * CPU.  The controlling process will hibernate at strategic points in
+ * the program when it is just waiting for input.
+ */
+
+  status = sys$bintim(&dtime,&delta);
+  if (!(status & SS$_NORMAL)) CloseDown(status);
+
+  status = sys$schdwk(0,0,&delta,&delta);
+  if (!(status & SS$_NORMAL)) CloseDown(status);
+
+
+  /*
+   * This is rather funky, but it saves me from having to totally
+   * rewrite some parts of the code (namely in_put in module CHARPROC.C)
+   */
+  pty = 1;
+  screen->respond = pty;
+  pty_mask = 1 << pty;
+  Select_mask = pty_mask;
+  X_mask = 1 << Xsocket;
+
+}
+
+
+/*
+ * This routine handles completion of write with echo.  It takes the
+ * echo buffer and puts it on the read queue.  It will then be processed
+ * by the routine tt_read.  If the echo buffer is empty, it is put back
+ * on the free buffer queue.
+ */
+
+static void tt_echo_ast(TT_BUF_STRUCT *buff_addr)
+{
+  int status;
+
+  if (buff_addr->length != 0)
+    {
+      status = LIB$INSQTI(buff_addr, &read_queue);
+      if((status != SS$_NORMAL) && (status != LIB$_ONEENTQUE))
+	{
+	  CloseDown(status);
+	}
+    }
+  else
+    {
+      freeBuff(buff_addr);
+    }
+}
+
+
+/*
+ * This routine writes to the pseudo terminal.  If there is a free
+ * buffer then write with an echo buffer completing asyncronously, else
+ * write syncronously using the buffer reserved for writing.  All errors
+ *  are fatal, except DATAOVERUN and DATALOST,these errors can be ignored.
+
+ CAREFUL! Whatever calls this must NOT pass more than VMS_TERM_BUFFER_SIZE
+ bytes at a time.  This definition has been moved to VMS.H
+
+ */
+
+int tt_write(char *tt_write_buf, int size)
+{
+  int status;
+  TT_BUF_STRUCT *echoBuff;
+
+  /* if writing stopped, return 0 until Xon */
+  if(write_stopped) return (0);
+
+  memmove(&tt_w_buff->data,tt_write_buf,size);
+
+  echoBuff = getBuff();
+  if (echoBuff != LIB$_QUEWASEMP)
+    {
+      status = PTD$WRITE (tt_chan, &tt_echo_ast, echoBuff,
+			  &tt_w_buff->status, size,
+			  &echoBuff->status, VMS_TERM_BUFFER_SIZE);
+    }
+  else
+    {
+      status = PTD$WRITE (tt_chan, 0, 0, &tt_w_buff->status, size, 0, 0);
+    }
+  if (status & SS$_NORMAL)
+    {
+      if ((tt_w_buff->status != SS$_NORMAL) &&
+	  (tt_w_buff->status != SS$_DATAOVERUN) &&
+	  (tt_w_buff->status != SS$_DATALOST))
+	{
+	  CloseDown(tt_w_buff->status);
+	}
+    }
+  else
+    {
+      CloseDown(status);
+    }
+
+  return(size);
+}
+
+
+/*
+ * This routine is called when a read to the pseudo terminal completes.
+ * Put the newly read buffer onto the read queue.  It will be processed
+ * and freed in the routine tt_read.
+ */
+
+static void tt_read_ast(TT_BUF_STRUCT *buff_addr)
+{
+  int status;
+
+  if (buff_addr->status & SS$_NORMAL)
+    {
+      status = LIB$INSQTI(buff_addr, &read_queue);
+      if ((status != SS$_NORMAL) && (status != LIB$_ONEENTQUE))
+	{
+	  CloseDown(status);
+	}
+    }
+  else
+    CloseDown(buff_addr->status);
+
+  tt_start_read();
+  sys$wake(0,0);
+  return;
+}
+
+
+/*
+ * If there is a free buffer on the buffer queue then Start a read from
+ * the pseudo terminal, otherwise set a flag, the reading will be restarted
+ * in the routine freeBuff when a buffer is freed.
+ */
+
+void tt_start_read(void)
+{
+  int status;
+  static int size;
+  TT_BUF_STRUCT *buff_addr;
+
+  buff_addr = getBuff();
+  if (buff_addr != LIB$_QUEWASEMP)
+    {
+      if(!tt_pasting){
+      status = PTD$READ (0, tt_chan, &tt_read_ast, buff_addr,
+			 &buff_addr->status, VMS_TERM_BUFFER_SIZE);
+      if ((status & SS$_NORMAL) != SS$_NORMAL)
+	{
+	  CloseDown(status);
+	}
+      }
+      }
+  else
+    {
+      read_stopped = TRUE;
+    }
+  return;
+}
+
+
+/*
+ * Get data from the pseudo terminal.  Return the data from the first item
+ * on the read queue, and put that buffer back onto the free buffer queue.
+ * Return the length or zero if the read queue is empty.
+ *
+ */
+
+int tt_read(char *buffer)
+{
+  TT_BUF_STRUCT *read_buff;
+  int status;
+  int len;
+
+   status = LIB$REMQHI(&read_queue, &read_buff);
+   if(status == LIB$_QUEWASEMP){
+     return(0);
+   }
+   else if (status & SS$_NORMAL)
+     {
+       len = read_buff->length;
+       memmove(buffer,&read_buff->data,len);
+       freeBuff(read_buff);
+       tt_new_output=TRUE; /* DRM something will be written */
+     }
+   else
+     CloseDown(status);
+
+   return(len);
+}
+
+
+/*
+ * if xon then it is safe to start writing again.
+ */
+
+static void send_xon(void)
+{
+  write_stopped = FALSE;
+}
+
+
+/*
+ * If Xoff then stop writing to the pseudo terminal until you get Xon.
+ */
+static void send_xoff(void)
+{
+  write_stopped = TRUE;
+}
+
+
+
+/*
+ * Beep the terminal to let the user know data will be lost because
+ * of too much data.
+ */
+
+static void send_bell(void)
+{
+   Bell();
+}
+
+/*
+ * if the pseudo terminal's characteristics change, check to see if the
+ * page size changed.  If it did, resize the widget, otherwise, ignore
+ * it!  This routine just gets the new term dimensions and sets a flag
+ * to indicate the term chars have changed.  The widget gets resized in
+ * the routine in_put in the module CHARPROC.C.  You cant resize the
+ * widget in this routine because this is an AST and X is not reenterent.
+ */
+
+static void char_change(void)
+{
+  int status;
+
+  /*
+   * Dont do anything if in Tek mode
+   */
+
+  if(!(term->screen.TekEmu))
+    {
+      status = sys$qiow(0,tt_chan,IO$_SENSEMODE,0,0,0,&tt_mode,8,0,0,0,0);
+      if(!(status & SS$_NORMAL)) CloseDown(status);
+
+      if((term->screen.max_row != tt_mode.length) ||
+	 (term->screen.max_col != tt_mode.page_width))
+	{
+	  tt_length = tt_mode.length;
+	  tt_width =  tt_mode.page_width;
+
+	  tt_changed = TRUE;
+
+	}
+    }
+}
+
+
+/*
+ * Put a free buffer back onto the buffer queue.  If reading was
+ * stopped for lack of free buffers, start reading again.
+ */
+
+static void freeBuff (TT_BUF_STRUCT *buff_addr)
+{
+  int ast_stat;
+  int status;
+
+  ast_stat = SYS$SETAST(0);
+  if (!read_stopped)
+    {
+      LIB$INSQHI(buff_addr, &buffer_queue);
+    }
+  else
+    {
+      status = PTD$READ (0, tt_chan, &tt_read_ast, buff_addr,
+			 &buff_addr->status, VMS_TERM_BUFFER_SIZE);
+      if (status & SS$_NORMAL)
+	{
+	  read_stopped = FALSE;
+	}
+      else
+	{
+	  CloseDown(status);
+	}
+    }
+  if (ast_stat == SS$_WASSET) ast_stat = SYS$SETAST(1);
+}
+
+
+/*
+ * return a free buffer from the buffer queue.
+ */
+
+TT_BUF_STRUCT *getBuff(void)
+{
+  int status;
+  TT_BUF_STRUCT *buff_addr;
+
+  status = LIB$REMQHI(&buffer_queue, &buff_addr);
+  if (status & SS$_NORMAL)
+    {
+      return(buff_addr);
+    }
+  else
+    {
+      return(status);
+    }
+}
+
+
+/*
+ * Close down and exit.  Kill the detached process (if it still
+ * exists), deassign mailbox channell (if assigned), cancel any
+ * waiting IO to the pseudo terminal and delete it, exit with any
+ * status information.
+ */
+
+static void CloseDown(int exit_status)
+{
+  int status;
+
+  /* if process has not terminated, do so now! */
+  if(pid != 0)
+    {
+      status = sys$forcex(&pid,0,0);
+      if(!(status & SS$_NORMAL)) lib$signal(status);
+    }
+
+  /* if mbx_chan is assigned, deassign it */
+  if(mbx_chan != 0)
+    {
+      sys$dassgn(mbx_chan);
+    }
+
+  /* cancel pseudo terminal IO requests */
+  status = ptd$cancel(tt_chan);
+  if(!(status & SS$_NORMAL)) lib$signal(status);
+
+  /* delete pseudo terminal */
+  status = ptd$delete(tt_chan);
+  if(!(status & SS$_NORMAL)) lib$signal(status);
+
+  if(!(exit_status & SS$_NORMAL)) lib$signal(exit_status);
+
+  exit(1);
+
+}
+
+
+/*
+ * This routine gets called when the detached process terminates (for
+ * whatever reason).  The mailbox buffer has final exit status.  Close
+ * down and exit.
+ */
+
+static void mbx_read_ast(void)
+{
+  int status;
+
+  pid = 0;
+
+  status = mbx_read_iosb.status;
+  if (!(status & SS$_NORMAL)) CloseDown(status);
+
+  status = (unsigned long int) mbx_buf.acc$l_finalsts;
+  if (!(status & SS$_NORMAL)) CloseDown(status);
+
+  CloseDown(1);
+
+}
+
+
+/*
+ * This routine starts a read on the mailbox associated with the detached
+ * process.  The AST routine gets called when the detached process terminates.
+ */
+
+static void mbx_read(void)
+{
+int status;
+static int size;
+
+   size = ACC$K_TERMLEN;
+   status = sys$qio(0,mbx_chan,
+          IO$_READVBLK,
+          &mbx_read_iosb,
+          &mbx_read_ast,
+          0,
+          &mbx_buf,
+          size,0,0,0,0);
+
+   if (!(status & SS$_NORMAL)) CloseDown(status);
+
+   return;
+}