BSD 4_4 release

[unix-history] / usr / src / sys / kern / tty_subr.c

diff --git a/usr/src/sys/kern/tty_subr.c b/usr/src/sys/kern/tty_subr.c
index 5a4b3ae..1679654 100644 (file)
--- a/usr/src/sys/kern/tty_subr.c
+++ b/usr/src/sys/kern/tty_subr.c
@@ -1,33 +1,73 @@
-/*     tty_subr.c      4.17    82/11/13        */
+/*-
+ * Copyright (c) 1982, 1986, 1993
+ *     The Regents of the University of California.  All rights reserved.
+ *
+ * This module is believed to contain source code proprietary to AT&T.
+ * Use and redistribution is subject to the Berkeley Software License
+ * Agreement and your Software Agreement with AT&T (Western Electric).
+ *
+ *     @(#)tty_subr.c  8.1 (Berkeley) 6/10/93
+ */

 
 

-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../h/conf.h"
-#include "../h/buf.h"
-#include "../h/tty.h"
-#include "../h/clist.h"
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/buf.h>
+#include <sys/ioctl.h>
+#include <sys/proc.h>
+#include <sys/tty.h>
+#include <sys/clist.h>

 
 char   cwaiting;
 
 char   cwaiting;

+struct cblock *cfree, *cfreelist;
+int    cfreecount, nclist;
+
+#define setquote(cp) \
+       setbit(((char *)((int)(cp)&~CROUND)+sizeof(struct cblock *)), \
+               (int)(cp)&CROUND)
+#define isquote(cp) \
+       isset(((char *)((int)(cp)&~CROUND)+sizeof(struct cblock *)), \
+               (int)(cp)&CROUND)
+#define cbptr(x) ((struct cblock *)(x))
+
+/*
+ * Initialize clist by freeing all character blocks.
+ */
+cinit()
+{
+       register int ccp;
+       register struct cblock *cp;
+
+       ccp = (int) cfree;
+       ccp = (ccp + CROUND) & ~CROUND;
+       for(cp = (struct cblock *) ccp; cp < &cfree[nclist - 1]; cp++) {
+               cp->c_next = cfreelist;
+               cfreelist = cp;
+               cfreecount += CBSIZE;
+       }
+}

 
 /*
  * Character list get/put
  */
 getc(p)
 
 /*
  * Character list get/put
  */
 getc(p)

-register struct clist *p;
+       register struct clist *p;

 {
        register struct cblock *bp;
        register int c, s;
 
 {
        register struct cblock *bp;
        register int c, s;
 

-       s = spl5();
+       s = spltty();

        if (p->c_cc <= 0) {
                c = -1;
                p->c_cc = 0;
                p->c_cf = p->c_cl = NULL;
        } else {
        if (p->c_cc <= 0) {
                c = -1;
                p->c_cc = 0;
                p->c_cf = p->c_cl = NULL;
        } else {

-               c = *p->c_cf++ & 0377;
+               c = *p->c_cf & 0377;
+               if (isquote(p->c_cf))
+                       c |= TTY_QUOTE;
+               p->c_cf++;

                if (--p->c_cc<=0) {
                if (--p->c_cc<=0) {

-                       bp = (struct cblock *)(p->c_cf-1);
-                       bp = (struct cblock *) ((int)bp & ~CROUND);
+                       bp = cbptr(p->c_cf-1);
+                       bp = cbptr((int)bp & ~CROUND);

                        p->c_cf = NULL;
                        p->c_cl = NULL;
                        bp->c_next = cfreelist;
                        p->c_cf = NULL;
                        p->c_cl = NULL;
                        bp->c_next = cfreelist;


@@ -38,7 +78,7 @@ register struct clist *p;
                                cwaiting = 0;
                        }
                } else if (((int)p->c_cf & CROUND) == 0){
                                cwaiting = 0;
                        }
                } else if (((int)p->c_cf & CROUND) == 0){

-                       bp = (struct cblock *)(p->c_cf);
+                       bp = cbptr(p->c_cf);

                        bp--;
                        p->c_cf = bp->c_next->c_info;
                        bp->c_next = cfreelist;
                        bp--;
                        p->c_cf = bp->c_next->c_info;
                        bp->c_next = cfreelist;


@@ -51,39 +91,45 @@ register struct clist *p;
                }
        }
        splx(s);
                }
        }
        splx(s);

-       return(c);
+       return (c);

 }
 
 }
 

-#if notdef

 /*
  * copy clist to buffer.
  * return number of bytes moved.
  */
 q_to_b(q, cp, cc)
 /*
  * copy clist to buffer.
  * return number of bytes moved.
  */
 q_to_b(q, cp, cc)

-register struct clist *q;
-register char *cp;
+       register struct clist *q;
+       register char *cp;
+       int cc;

 {
        register struct cblock *bp;
 {
        register struct cblock *bp;

-       register int s;
+       register int s, nc;

        char *acp;
 
        if (cc <= 0)
        char *acp;
 
        if (cc <= 0)

-               return(0);
-       s = spl5();
+               return (0);
+       s = spltty();

        if (q->c_cc <= 0) {
                q->c_cc = 0;
                q->c_cf = q->c_cl = NULL;
                splx(s);
        if (q->c_cc <= 0) {
                q->c_cc = 0;
                q->c_cf = q->c_cl = NULL;
                splx(s);

-               return(0);
+               return (0);

        }
        acp = cp;
        }
        acp = cp;

-       cc++;

 
 

-       while (--cc) {
-               *cp++ = *q->c_cf++;
-               if (--q->c_cc <= 0) {
-                       bp = (struct cblock *)(q->c_cf-1);
-                       bp = (struct cblock *)((int)bp & ~CROUND);
+       while (cc) {
+               nc = sizeof (struct cblock) - ((int)q->c_cf & CROUND);
+               nc = min(nc, cc);
+               nc = min(nc, q->c_cc);
+               (void) bcopy(q->c_cf, cp, (unsigned)nc);
+               q->c_cf += nc;
+               q->c_cc -= nc;
+               cc -= nc;
+               cp += nc;
+               if (q->c_cc <= 0) {
+                       bp = cbptr(q->c_cf - 1);
+                       bp = cbptr((int)bp & ~CROUND);

                        q->c_cf = q->c_cl = NULL;
                        bp->c_next = cfreelist;
                        cfreelist = bp;
                        q->c_cf = q->c_cl = NULL;
                        bp->c_next = cfreelist;
                        cfreelist = bp;


@@ -95,7 +141,7 @@ register char *cp;
                        break;
                }
                if (((int)q->c_cf & CROUND) == 0) {
                        break;
                }
                if (((int)q->c_cf & CROUND) == 0) {

-                       bp = (struct cblock *)(q->c_cf);
+                       bp = cbptr(q->c_cf);

                        bp--;
                        q->c_cf = bp->c_next->c_info;
                        bp->c_next = cfreelist;
                        bp--;
                        q->c_cf = bp->c_next->c_info;
                        bp->c_next = cfreelist;


@@ -108,9 +154,8 @@ register char *cp;
                }
        }
        splx(s);
                }
        }
        splx(s);

-       return(cp-acp);
+       return (cp-acp);

 }
 }

-#endif

 
 /*
  * Return count of contiguous characters
 
 /*
  * Return count of contiguous characters


@@ -118,12 +163,12 @@ register char *cp;
  * Stop counting if flag&character is non-null.
  */
 ndqb(q, flag)
  * Stop counting if flag&character is non-null.
  */
 ndqb(q, flag)

-register struct clist *q;
+       register struct clist *q;
+       int flag;

 {
 {

-register cc;
-int s;
+       register int cc, s;

 
 

-       s = spl5();
+       s = spltty();

        if (q->c_cc <= 0) {
                cc = -q->c_cc;
                goto out;
        if (q->c_cc <= 0) {
                cc = -q->c_cc;
                goto out;


@@ -149,33 +194,25 @@ int s;
        }
 out:
        splx(s);
        }
 out:
        splx(s);

-       return(cc);
+       return (cc);

 }
 
 }
 

-
-

 /*
  * Flush cc bytes from q.
  */
 ndflush(q, cc)
 /*
  * Flush cc bytes from q.
  */
 ndflush(q, cc)

-register struct clist *q;
-register cc;
+       register struct clist *q;
+       register int cc;

 {
 {

-register struct cblock *bp;
-char *end;
-int rem;
-register s;
-
-       s = spl5();
-       if (q->c_cc < 0) {
-               printf("neg q flush\n");
-               goto out;
-       }
-       if (q->c_cc == 0) {
+       register struct cblock *bp;
+       char *end;
+       int rem, s;
+
+       s = spltty();
+       if (q->c_cc <= 0)

                goto out;
                goto out;

-       }

        while (cc>0 && q->c_cc) {
        while (cc>0 && q->c_cc) {

-               bp = (struct cblock *)((int)q->c_cf & ~CROUND);
+               bp = cbptr((int)q->c_cf & ~CROUND);

                if ((int)bp == (((int)q->c_cl-1) & ~CROUND)) {
                        end = q->c_cl;
                } else {
                if ((int)bp == (((int)q->c_cl-1) & ~CROUND)) {
                        end = q->c_cl;
                } else {


@@ -218,27 +255,29 @@ out:
 
 
 putc(c, p)
 
 
 putc(c, p)

-register struct clist *p;
+       int c;
+       register struct clist *p;

 {
        register struct cblock *bp;
        register char *cp;
 {
        register struct cblock *bp;
        register char *cp;

-       register s;
+       register int s;

 
 

-       s = spl5();
-       if ((cp = p->c_cl) == NULL || p->c_cc < 0 ) {
+       s = spltty();
+       if ((cp = p->c_cl) == NULL || p->c_cc < 0 ) {   /* no cblocks yet */

                if ((bp = cfreelist) == NULL) {
                        splx(s);
                if ((bp = cfreelist) == NULL) {
                        splx(s);

-                       return(-1);
+                       return (-1);

                }
                cfreelist = bp->c_next;
                cfreecount -= CBSIZE;
                bp->c_next = NULL;
                }
                cfreelist = bp->c_next;
                cfreecount -= CBSIZE;
                bp->c_next = NULL;

+               bzero(bp->c_quote, CBQSIZE);

                p->c_cf = cp = bp->c_info;
        } else if (((int)cp & CROUND) == 0) {
                p->c_cf = cp = bp->c_info;
        } else if (((int)cp & CROUND) == 0) {

-               bp = (struct cblock *)cp - 1;
+               bp = cbptr(cp) - 1;     /* pointer arith */

                if ((bp->c_next = cfreelist) == NULL) {
                        splx(s);
                if ((bp->c_next = cfreelist) == NULL) {
                        splx(s);

-                       return(-1);
+                       return (-1);

                }
                bp = bp->c_next;
                cfreelist = bp->c_next;
                }
                bp = bp->c_next;
                cfreelist = bp->c_next;


@@ -246,62 +285,66 @@ register struct clist *p;
                bp->c_next = NULL;
                cp = bp->c_info;
        }
                bp->c_next = NULL;
                cp = bp->c_info;
        }

+       if (c&TTY_QUOTE)
+               setquote(cp);

        *cp++ = c;
        p->c_cc++;
        p->c_cl = cp;
        splx(s);
        *cp++ = c;
        p->c_cc++;
        p->c_cl = cp;
        splx(s);

-       return(0);
+       return (0);

 }
 
 }
 

-
-

 /*
  * copy buffer to clist.
  * return number of bytes not transfered.
  */
 b_to_q(cp, cc, q)
 /*
  * copy buffer to clist.
  * return number of bytes not transfered.
  */
 b_to_q(cp, cc, q)

-register char *cp;
-struct clist *q;
-register int cc;
+       register char *cp;
+       struct clist *q;
+       register int cc;

 {
        register char *cq;
        register struct cblock *bp;
 {
        register char *cq;
        register struct cblock *bp;

-       register s, acc;
+       register int s, nc;
+       int acc;

 
        if (cc <= 0)
 
        if (cc <= 0)

-               return(0);
+               return (0);

        acc = cc;
        acc = cc;

-
-
-       s = spl5();
+       s = spltty();

        if ((cq = q->c_cl) == NULL || q->c_cc < 0) {
                if ((bp = cfreelist) == NULL) 
                        goto out;
                cfreelist = bp->c_next;
                cfreecount -= CBSIZE;
        if ((cq = q->c_cl) == NULL || q->c_cc < 0) {
                if ((bp = cfreelist) == NULL) 
                        goto out;
                cfreelist = bp->c_next;
                cfreecount -= CBSIZE;

+               bzero(bp->c_quote, CBQSIZE);

                bp->c_next = NULL;
                q->c_cf = cq = bp->c_info;
        }
 
        while (cc) {
                if (((int)cq & CROUND) == 0) {
                bp->c_next = NULL;
                q->c_cf = cq = bp->c_info;
        }
 
        while (cc) {
                if (((int)cq & CROUND) == 0) {

-                       bp = (struct cblock *) cq - 1;
+                       bp = cbptr(cq) - 1;

                        if ((bp->c_next = cfreelist) == NULL) 
                                goto out;
                        bp = bp->c_next;
                        cfreelist = bp->c_next;
                        cfreecount -= CBSIZE;
                        if ((bp->c_next = cfreelist) == NULL) 
                                goto out;
                        bp = bp->c_next;
                        cfreelist = bp->c_next;
                        cfreecount -= CBSIZE;

+                       bzero(bp->c_quote, CBQSIZE);

                        bp->c_next = NULL;
                        cq = bp->c_info;
                }
                        bp->c_next = NULL;
                        cq = bp->c_info;
                }

-               *cq++ = *cp++;
-               cc--;
+               nc = min(cc, sizeof (struct cblock) - ((int)cq & CROUND));
+               (void) bcopy(cp, cq, (unsigned)nc);
+               cp += nc;
+               cq += nc;
+               cc -= nc;

        }
 out:
        q->c_cl = cq;
        }
 out:
        q->c_cl = cq;

-       q->c_cc += acc-cc;
+       q->c_cc += acc - cc;

        splx(s);
        splx(s);

-       return(cc);
+       return (cc);

 }
 
 /*
 }
 
 /*


@@ -313,14 +356,19 @@ out:
  * pointer becomes invalid.  Note that interrupts are NOT masked.
  */
 char *
  * pointer becomes invalid.  Note that interrupts are NOT masked.
  */
 char *

-nextc(p, cp)
-register struct clist *p;
-register char *cp;
+nextc(p, cp, c)
+       register struct clist *p;
+       register char *cp;
+       register int *c;

 {
 
        if (p->c_cc && ++cp != p->c_cl) {
 {
 
        if (p->c_cc && ++cp != p->c_cl) {

-               if (((int)cp & CROUND) == 0)
-                       return (((struct cblock *)cp)[-1].c_next->c_info);
+               if (((int)cp & CROUND) == 0) {
+                       cp = (cbptr(cp))[-1].c_next->c_info;
+               }
+               *c = *cp;
+               if (isquote(cp))
+                       *c |= TTY_QUOTE;

                return (cp);
        }
        return (0);
                return (cp);
        }
        return (0);


@@ -330,29 +378,32 @@ register char *cp;
  * Remove the last character in the list and return it.
  */
 unputc(p)
  * Remove the last character in the list and return it.
  */
 unputc(p)

-register struct clist *p;
+       register struct clist *p;

 {
        register struct cblock *bp;
        register int c, s;
        struct cblock *obp;
 
 {
        register struct cblock *bp;
        register int c, s;
        struct cblock *obp;
 

-       s = spl5();
+       s = spltty();

        if (p->c_cc <= 0)
                c = -1;
        else {
                c = *--p->c_cl;
        if (p->c_cc <= 0)
                c = -1;
        else {
                c = *--p->c_cl;

+               if (isquote(p->c_cl))
+                       c |= TTY_QUOTE;

                if (--p->c_cc <= 0) {
                if (--p->c_cc <= 0) {

-                       bp = (struct cblock *)p->c_cl;
-                       bp = (struct cblock *)((int)bp & ~CROUND);
+                       bp = cbptr(p->c_cl);
+                       bp = cbptr((int)bp & ~CROUND);

                        p->c_cl = p->c_cf = NULL;
                        bp->c_next = cfreelist;
                        cfreelist = bp;
                        cfreecount += CBSIZE;
                        p->c_cl = p->c_cf = NULL;
                        bp->c_next = cfreelist;
                        cfreelist = bp;
                        cfreecount += CBSIZE;

-               } else if (((int)p->c_cl & CROUND) == sizeof(bp->c_next)) {
+               } else if (p->c_cl == (cbptr((int)p->c_cl & ~CROUND))->c_info) {

                        p->c_cl = (char *)((int)p->c_cl & ~CROUND);
                        p->c_cl = (char *)((int)p->c_cl & ~CROUND);

-                       bp = (struct cblock *)p->c_cf;
-                       bp = (struct cblock *)((int)bp & ~CROUND);
-                       while (bp->c_next != (struct cblock *)p->c_cl)
+
+                       bp = cbptr(p->c_cf);
+                       bp = cbptr((int)bp & ~CROUND);
+                       while (bp->c_next != cbptr(p->c_cl))

                                bp = bp->c_next;
                        obp = bp;
                        p->c_cl = (char *)(bp + 1);
                                bp = bp->c_next;
                        obp = bp;
                        p->c_cl = (char *)(bp + 1);


@@ -370,48 +421,147 @@ register struct clist *p;
 /*
  * Put the chars in the from que
  * on the end of the to que.
 /*
  * Put the chars in the from que
  * on the end of the to que.

- *
- * SHOULD JUST USE q_to_b AND THEN b_to_q HERE.

  */
 catq(from, to)
  */
 catq(from, to)

-struct clist *from, *to;
+       struct clist *from, *to;

 {
 {

-       register c;
-
+#ifdef notdef
+       char bbuf[CBSIZE*4];
+#endif
+       register int s, c;
+
+       s = spltty();
+       if (to->c_cc == 0) {
+               *to = *from;
+               from->c_cc = 0;
+               from->c_cf = NULL;
+               from->c_cl = NULL;
+               splx(s);
+               return;
+       }
+       splx(s);
+#ifdef notdef
+       while (from->c_cc > 0) {
+               c = q_to_b(from, bbuf, sizeof bbuf);
+               (void) b_to_q(bbuf, c, to);
+       }
+#endif
+       /* XXX - FIX */

        while ((c = getc(from)) >= 0)
        while ((c = getc(from)) >= 0)

-               (void) putc(c, to);
+               putc(c, to);

 }
 
 }
 

-#include "dmc.h"
-#ifdef NDMC > 0
+#ifdef unneeded

 /*
 /*

- * integer (2-byte) get/put
- * using clists
+ * Integer (short) get/put using clists.

  */
  */

+typedef        u_short word_t;
+

 getw(p)
        register struct clist *p;
 {
 getw(p)
        register struct clist *p;
 {

-       register int s;
+       register int s, c;
+       register struct cblock *bp;

 
        if (p->c_cc <= 1)
                return(-1);
 
        if (p->c_cc <= 1)
                return(-1);

-       s = getc(p);
-       return(s | (getc(p)<<8));
+       if (p->c_cc & 01) {
+               c = getc(p);
+#if BYTE_ORDER == LITTLE_ENDIAN
+               return (c | (getc(p)<<8));
+#else
+               return (getc(p) | (c<<8));
+#endif
+       }
+       s = spltty();
+#if BYTE_ORDER == LITTLE_ENDIAN 
+       c = (((u_char *)p->c_cf)[0] << 8) | ((u_char *)p->c_cf)[1];
+#else
+       c = (((u_char *)p->c_cf)[1] << 8) | ((u_char *)p->c_cf)[0];
+#endif
+       p->c_cf += sizeof (word_t);
+       p->c_cc -= sizeof (word_t);
+       if (p->c_cc <= 0) {
+               bp = cbptr(p->c_cf-1);
+               bp = cbptr((int)bp & ~CROUND);
+               p->c_cf = NULL;
+               p->c_cl = NULL;
+               bp->c_next = cfreelist;
+               cfreelist = bp;
+               cfreecount += CBSIZE;
+               if (cwaiting) {
+                       wakeup(&cwaiting);
+                       cwaiting = 0;
+               }
+       } else if (((int)p->c_cf & CROUND) == 0) {
+               bp = cbptr(p->c_cf);
+               bp--;
+               p->c_cf = bp->c_next->c_info;
+               bp->c_next = cfreelist;
+               cfreelist = bp;
+               cfreecount += CBSIZE;
+               if (cwaiting) {
+                       wakeup(&cwaiting);
+                       cwaiting = 0;
+               }
+       }
+       splx(s);
+       return (c);

 }
 
 putw(c, p)
        register struct clist *p;
 }
 
 putw(c, p)
        register struct clist *p;

+       word_t c;

 {
 {

-       register s;
+       register int s;
+       register struct cblock *bp;
+       register char *cp;

 
 

-       s = spl5();
+       s = spltty();

        if (cfreelist==NULL) {
                splx(s);
                return(-1);
        }
        if (cfreelist==NULL) {
                splx(s);
                return(-1);
        }

-       (void) putc(c, p);
-       (void) putc(c>>8, p);
+       if (p->c_cc & 01) {
+#if BYTE_ORDER == LITTLE_ENDIAN
+               (void) putc(c, p);
+               (void) putc(c>>8, p);
+#else
+               (void) putc(c>>8, p);
+               (void) putc(c, p);
+#endif
+       } else {
+               if ((cp = p->c_cl) == NULL || p->c_cc < 0 ) {
+                       if ((bp = cfreelist) == NULL) {
+                               splx(s);
+                               return (-1);
+                       }
+                       cfreelist = bp->c_next;
+                       cfreecount -= CBSIZE;
+                       bp->c_next = NULL;
+                       p->c_cf = cp = bp->c_info;
+               } else if (((int)cp & CROUND) == 0) {
+                       bp = cbptr(cp) - 1;
+                       if ((bp->c_next = cfreelist) == NULL) {
+                               splx(s);
+                               return (-1);
+                       }
+                       bp = bp->c_next;
+                       cfreelist = bp->c_next;
+                       cfreecount -= CBSIZE;
+                       bp->c_next = NULL;
+                       cp = bp->c_info;
+               }
+#if defined(vax)
+               *(word_t *)cp = c;
+#else
+               ((u_char *)cp)[0] = c>>8;
+               ((u_char *)cp)[1] = c;
+#endif
+               p->c_cl = cp + sizeof (word_t);
+               p->c_cc += sizeof (word_t);
+       }

        splx(s);
        splx(s);

-       return(0);
+       return (0);

 }
 }

-#endif
+#endif /* unneeded */