BSD 4_3_Net_2 release

[unix-history] / usr / src / sys / sys / tty.h

diff --git a/usr/src/sys/sys/tty.h b/usr/src/sys/sys/tty.h
index 1131050..a153893 100644 (file)
--- a/usr/src/sys/sys/tty.h
+++ b/usr/src/sys/sys/tty.h
@@ -1,23 +1,48 @@
-/*
- * Copyright (c) 1982, 1986 Regents of the University of California.
- * All rights reserved.  The Berkeley software License Agreement
- * specifies the terms and conditions for redistribution.
+/*-
+ * Copyright (c) 1982, 1986 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.

  *
  *

- *     @(#)tty.h       7.8 (Berkeley) %G%
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *     @(#)tty.h       7.10 (Berkeley) 6/26/91

  */
 
 #include <sys/termios.h>
 
 /*
  */
 
 #include <sys/termios.h>
 
 /*

- * A clist structure is the head of a linked list queue
- * of characters.  The characters are stored in blocks
- * containing a link and CBSIZE (param.h) characters. 
- * The routines in tty_subr.c manipulate these structures.
+ * Clists are character lists, which is a variable length linked list
+ * of cblocks, wiht a count of the number of characters in the list.

  */
 struct clist {
  */
 struct clist {

-       int     c_cc;           /* character count */
-       char    *c_cf;          /* pointer to first char */
-       char    *c_cl;          /* pointer to last char */
+       int     c_cc;           /* count of characters in queue */
+       char    *c_cf;          /* first character/cblock */
+       char    *c_cl;          /* last chararacter/cblock */

 };
 
 /*
 };
 
 /*


@@ -64,20 +89,20 @@ struct tty {
        short   t_gen;                  /* generation number */
 };
 
        short   t_gen;                  /* generation number */
 };
 

-#define        TTIPRI  28
-#define        TTOPRI  29
+#define        TTIPRI  25                      /* sleep priority for tty reads */
+#define        TTOPRI  26                      /* sleep priority for tty writes */

 
 

-/* limits */

 #define        TTMASK  15
 #define        OBUFSIZ 100
 #define        TTYHOG  1024
 #define        TTMASK  15
 #define        OBUFSIZ 100
 #define        TTYHOG  1024

+

 #ifdef KERNEL
 #define TTMAXHIWAT     roundup(2048, CBSIZE)
 #define TTMINHIWAT     roundup(100, CBSIZE)
 #define TTMAXLOWAT     256
 #define TTMINLOWAT     32
 extern struct ttychars ttydefaults;
 #ifdef KERNEL
 #define TTMAXHIWAT     roundup(2048, CBSIZE)
 #define TTMINHIWAT     roundup(100, CBSIZE)
 #define TTMAXLOWAT     256
 #define TTMINLOWAT     32
 extern struct ttychars ttydefaults;

-#endif /*KERNEL*/
+#endif /* KERNEL */

 
 /* internal state bits */
 #define        TS_TIMEOUT      0x000001        /* delay timeout in progress */
 
 /* internal state bits */
 #define        TS_TIMEOUT      0x000001        /* delay timeout in progress */


@@ -89,7 +114,7 @@ extern       struct ttychars ttydefaults;
 #define        TS_ASLEEP       0x000040        /* wakeup when output done */
 #define        TS_XCLUDE       0x000080        /* exclusive-use flag against open */
 #define        TS_TTSTOP       0x000100        /* output stopped by ctl-s */
 #define        TS_ASLEEP       0x000040        /* wakeup when output done */
 #define        TS_XCLUDE       0x000080        /* exclusive-use flag against open */
 #define        TS_TTSTOP       0x000100        /* output stopped by ctl-s */

-#define        TS_HUPCLS       0x000200        /* hang up upon last close */
+/* was TS_HUPCLS       0x000200         * hang up upon last close */

 #define        TS_TBLOCK       0x000400        /* tandem queue blocked */
 #define        TS_RCOLL        0x000800        /* collision in read select */
 #define        TS_WCOLL        0x001000        /* collision in write select */
 #define        TS_TBLOCK       0x000400        /* tandem queue blocked */
 #define        TS_RCOLL        0x000800        /* collision in read select */
 #define        TS_WCOLL        0x001000        /* collision in write select */


@@ -99,7 +124,7 @@ extern       struct ttychars ttydefaults;
 #define        TS_ERASE        0x040000        /* within a \.../ for PRTRUB */
 #define        TS_LNCH         0x080000        /* next character is literal */
 #define        TS_TYPEN        0x100000        /* retyping suspended input (PENDIN) */
 #define        TS_ERASE        0x040000        /* within a \.../ for PRTRUB */
 #define        TS_LNCH         0x080000        /* next character is literal */
 #define        TS_TYPEN        0x100000        /* retyping suspended input (PENDIN) */

-#define        TS_CNTTB        0x200000        /* counting tab width, leave FLUSHO alone */
+#define        TS_CNTTB        0x200000        /* counting tab width, ignore FLUSHO */

 
 #define        TS_LOCAL        (TS_BKSL|TS_ERASE|TS_LNCH|TS_TYPEN|TS_CNTTB)
 
 
 #define        TS_LOCAL        (TS_BKSL|TS_ERASE|TS_LNCH|TS_TYPEN|TS_CNTTB)