X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/68503f9a0ca5129190c66647aa8f618b5cc5d441..7bf304e65beb1e282cd098ed53ab9f4999b78280:/usr/src/sys/kern/subr_prf.c

diff --git a/usr/src/sys/kern/subr_prf.c b/usr/src/sys/kern/subr_prf.c
index c7d1cc9b28..b2e04feebe 100644
--- a/usr/src/sys/kern/subr_prf.c
+++ b/usr/src/sys/kern/subr_prf.c
@@ -1,17 +1,33 @@
-/*	subr_prf.c	4.21	82/01/16	*/
-
-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../h/seg.h"
-#include "../h/buf.h"
-#include "../h/conf.h"
-#include "../h/mtpr.h"
-#include "../h/reboot.h"
-#include "../h/vm.h"
-#include "../h/msgbuf.h"
-#include "../h/dir.h"
-#include "../h/user.h"
-#include "../h/tty.h"
+/*
+ * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ *
+ *	@(#)subr_prf.c	7.14 (Berkeley) %G%
+ */
+
+#include "param.h"
+#include "systm.h"
+#include "seg.h"
+#include "buf.h"
+#include "conf.h"
+#include "reboot.h"
+#include "vm.h"
+#include "msgbuf.h"
+#include "user.h"
+#include "proc.h"
+#include "ioctl.h"
+#include "tty.h"
+#include "syslog.h"
+
+#include "machine/mtpr.h"
+#ifdef KADB
+#include "machine/kdbparam.h"
+#endif
+
+#define TOCONS	0x1
+#define TOTTY	0x2
+#define TOLOG	0x4
 
 /*
  * In case console is off,
@@ -20,6 +36,16 @@
  */
 char	*panicstr;
 
+extern	cnputc();			/* standard console putc */
+extern	struct tty cons;		/* standard console tty */
+struct	tty *constty;			/* pointer to console "window" tty */
+int	(*v_putc)() = cnputc;		/* routine to putc on virtual console */
+
+extern	cnputc();			/* standard console putc */
+extern	struct tty cons;		/* standard console tty */
+struct	tty *constty;			/* pointer to console "window" tty */
+int	(*v_console)() = cnputc;	/* routine to putc on virtual console */
+
 /*
  * Scaled down version of C Library printf.
  * Used to print diagnostic information directly on console tty.
@@ -36,34 +62,141 @@ char	*panicstr;
  * a character <= 32), give the name of the register.  Thus
  *	printf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
  * would produce output:
- *	reg=2<BITTWO,BITONE>
+ *	reg=3<BITTWO,BITONE>
+ *
+ * Another additional format: %r is used to pass an additional format string
+ * and argument list recursively.  Usage is typically:
+ *
+ * fn(otherstuff, fmt [, arg1, ... ] )
+ *	char *fmt;
+ *	u_int arg1, ...;
+ *
+ *	printf("prefix: %r, other stuff\n", fmt, &arg1);
  */
+#if defined(tahoe)
+int	consintr;
+#endif
+
 /*VARARGS1*/
 printf(fmt, x1)
 	char *fmt;
 	unsigned x1;
 {
+#if defined(tahoe)
+	register int savintr;
 
-	prf(fmt, &x1, 0);
+	savintr = consintr, consintr = 0;	/* disable interrupts */
+#endif
+	prf(fmt, &x1, TOCONS | TOLOG, (struct tty *)0);
+	logwakeup();
+#if defined(tahoe)
+	consintr = savintr;			/* reenable interrupts */
+#endif
 }
 
 /*
- * Uprintf prints to the current user's terminal,
- * guarantees not to sleep (so can be called by interrupt routines)
- * and does no watermark checking - (so no verbose messages).
+ * Uprintf prints to the current user's terminal.
+ * It may block if the tty queue is overfull.
+ * No message is printed if the queue does not clear
+ * in a reasonable time.
+ * Should determine whether current terminal user is related
+ * to this process.
  */
 /*VARARGS1*/
 uprintf(fmt, x1)
 	char *fmt;
 	unsigned x1;
 {
+#ifdef notdef
+	register struct proc *p;
+#endif
+	register struct tty *tp;
 
-	prf(fmt, &x1, 2);
+	if ((tp = u.u_ttyp) == NULL)
+		return;
+#ifdef notdef
+	if (tp->t_pgrp && (p = pfind(tp->t_pgrp)))
+		if (p->p_uid != u.u_uid)	/* doesn't account for setuid */
+			return;
+#endif
+	if (ttycheckoutq(tp, 1))
+		prf(fmt, &x1, TOTTY, tp);
 }
 
-prf(fmt, adx, touser)
+/*
+ * tprintf prints on the specified terminal (console if none)
+ * and logs the message.  It is designed for error messages from
+ * single-open devices, and may be called from interrupt level
+ * (does not sleep).
+ */
+/*VARARGS2*/
+tprintf(tp, fmt, x1)
+	register struct tty *tp;
+	char *fmt;
+	unsigned x1;
+{
+	int flags = TOTTY | TOLOG;
+
+	logpri(LOG_INFO);
+	if (tp == (struct tty *)NULL) {
+		tp = constty;
+		if (tp == (struct tty *)NULL)
+			tp = &cons;
+	}
+	if (ttycheckoutq(tp, 0) == 0)
+		flags = TOLOG;
+	prf(fmt, &x1, flags, tp);
+	logwakeup();
+}
+
+/*
+ * Log writes to the log buffer,
+ * and guarantees not to sleep (so can be called by interrupt routines).
+ * If there is no process reading the log yet, it writes to the console also.
+ */
+/*VARARGS2*/
+log(level, fmt, x1)
+	char *fmt;
+	unsigned x1;
+{
+	register s = splhigh();
+	extern int log_open;
+
+	logpri(level);
+	prf(fmt, &x1, TOLOG, (struct tty *)0);
+	splx(s);
+	if (!log_open)
+		prf(fmt, &x1, TOCONS, (struct tty *)0);
+	logwakeup();
+}
+
+logpri(level)
+	int level;
+{
+
+	putchar('<', TOLOG, (struct tty *)0);
+	printn((u_long)level, 10, TOLOG, (struct tty *)0);
+	putchar('>', TOLOG, (struct tty *)0);
+}
+
+/*VARARGS1*/
+addlog(fmt, x1)
+	char *fmt;
+	unsigned x1;
+{
+	register s = splhigh();
+
+	prf(fmt, &x1, TOLOG, (struct tty *)0);
+	splx(s);
+	if (!log_open)
+		prf(fmt, &x1, TOCONS, (struct tty *)0);
+	logwakeup();
+}
+
+prf(fmt, adx, flags, ttyp)
 	register char *fmt;
 	register u_int *adx;
+	struct tty *ttyp;
 {
 	register int b, c, i;
 	char *s;
@@ -71,13 +204,13 @@ prf(fmt, adx, touser)
 
 loop:
 	while ((c = *fmt++) != '%') {
-		if(c == '\0')
+		if (c == '\0')
 			return;
-		putchar(c, touser);
+		putchar(c, flags, ttyp);
 	}
 again:
 	c = *fmt++;
-	/* THIS CODE IS VAX DEPENDENT IN HANDLING %l? AND %c */
+	/* THIS CODE IS MACHINE DEPENDENT IN HANDLING %l? AND %c */
 	switch (c) {
 
 	case 'l':
@@ -86,51 +219,62 @@ again:
 		b = 16;
 		goto number;
 	case 'd': case 'D':
-	case 'u':		/* what a joke */
+		b = -10;
+		goto number;
+	case 'u':
 		b = 10;
 		goto number;
 	case 'o': case 'O':
 		b = 8;
 number:
-		printn((u_long)*adx, b, touser);
+		printn((u_long)*adx, b, flags, ttyp);
 		break;
 	case 'c':
 		b = *adx;
+#if BYTE_ORDER == LITTLE_ENDIAN
 		for (i = 24; i >= 0; i -= 8)
 			if (c = (b >> i) & 0x7f)
-				putchar(c, touser);
+				putchar(c, flags, ttyp);
+#endif
+#if BYTE_ORDER == BIG_ENDIAN
+		if (c = (b & 0x7f))
+			putchar(c, flags, ttyp);
+#endif
 		break;
 	case 'b':
 		b = *adx++;
 		s = (char *)*adx;
-		printn((u_long)b, *s++, touser);
+		printn((u_long)b, *s++, flags, ttyp);
 		any = 0;
 		if (b) {
-			putchar('<', touser);
 			while (i = *s++) {
 				if (b & (1 << (i-1))) {
-					if (any)
-						putchar(',', touser);
+					putchar(any ? ',' : '<', flags, ttyp);
 					any = 1;
 					for (; (c = *s) > 32; s++)
-						putchar(c, touser);
+						putchar(c, flags, ttyp);
 				} else
 					for (; *s > 32; s++)
 						;
 			}
 			if (any)
-				putchar('>', touser);
+				putchar('>', flags, ttyp);
 		}
 		break;
 
 	case 's':
 		s = (char *)*adx;
 		while (c = *s++)
-			putchar(c, touser);
+			putchar(c, flags, ttyp);
+		break;
+
+	case 'r':
+		s = (char *)*adx++;
+		prf(s, (u_int *)*adx, flags, ttyp);
 		break;
 
 	case '%':
-		putchar('%', touser);
+		putchar('%', flags, ttyp);
 		break;
 	}
 	adx++;
@@ -141,15 +285,19 @@ number:
  * Printn prints a number n in base b.
  * We don't use recursion to avoid deep kernel stacks.
  */
-printn(n, b, touser)
+printn(n, b, flags, ttyp)
 	u_long n;
+	struct tty *ttyp;
 {
 	char prbuf[11];
 	register char *cp;
 
-	if (b == 10 && (int)n < 0) {
-		putchar('-', touser);
-		n = (unsigned)(-(int)n);
+	if (b == -10) {
+		if ((int)n < 0) {
+			putchar('-', flags, ttyp);
+			n = (unsigned)(-(int)n);
+		}
+		b = -b;
 	}
 	cp = prbuf;
 	do {
@@ -157,7 +305,7 @@ printn(n, b, touser)
 		n /= b;
 	} while (n);
 	do
-		putchar(*--cp, touser);
+		putchar(*--cp, flags, ttyp);
 	while (cp > prbuf);
 }
 
@@ -170,13 +318,23 @@ printn(n, b, touser)
 panic(s)
 	char *s;
 {
-	int bootopt = RB_AUTOBOOT;
+	int bootopt = RB_AUTOBOOT | RB_DUMP;
 
 	if (panicstr)
 		bootopt |= RB_NOSYNC;
-	panicstr = s;
+	else {
+		panicstr = s;
+	}
 	printf("panic: %s\n", s);
-	boot(RB_PANIC, bootopt);
+#ifdef KADB
+	if (boothowto & RB_KDB) {
+		int x = splnet();	/* below kdb pri */
+
+		setsoftkdb();
+		splx(x);
+	}
+#endif
+	boot(bootopt);
 }
 
 /*
@@ -186,20 +344,7 @@ tablefull(tab)
 	char *tab;
 {
 
-	printf("%s: table is full\n", tab);
-}
-
-/*
- * Hard error is the preface to plaintive error messages
- * about failing disk transfers.
- */
-harderr(bp, cp)
-	struct buf *bp;
-	char *cp;
-{
-
-	printf("%s%d%c: hard error sn%d ", cp,
-	    dkunit(bp), 'a'+(minor(bp->b_dev)&07), bp->b_blkno);
+	log(LOG_ERR, "%s: table is full\n", tab);
 }
 
 /*
@@ -208,33 +353,49 @@ harderr(bp, cp)
  * are saved in msgbuf for inspection later.
  */
 /*ARGSUSED*/
-putchar(c, touser)
+putchar(c, flags, tp)
 	register int c;
+	struct tty *tp;
 {
+	extern int msgbufmapped;
 
-	if (touser) {
-		register struct tty *tp = u.u_ttyp;
+	if (panicstr)
+		constty = 0;
+	if ((flags & TOCONS) && tp == 0 && constty) {
+		tp = constty;
+		flags |= TOTTY;
+	}
+	if ((flags & TOCONS) && panicstr == 0 && tp == 0 && constty) {
+		tp = constty;
+		flags |= TOTTY;
+	}
+	if (flags & TOTTY) {
+		register s = spltty();
 
-		if (tp && (tp->t_state&TS_CARR_ON)) {
-			register s = spl6();
+		if (tp && (tp->t_state & (TS_CARR_ON | TS_ISOPEN)) ==
+		    (TS_CARR_ON | TS_ISOPEN)) {
 			if (c == '\n')
 				(void) ttyoutput('\r', tp);
 			(void) ttyoutput(c, tp);
 			ttstart(tp);
-			splx(s);
-		}
-		return;
+			flags &= ~TOCONS;
+		} else if ((flags & TOCONS) && tp == constty)
+			constty = 0;
+		splx(s);
 	}
-	if (c != '\0' && c != '\r' && c != 0177 && mfpr(MAPEN)) {
+	if ((flags & TOLOG) && c != '\0' && c != '\r' && c != 0177 &&
+	    msgbufmapped) {
 		if (msgbuf.msg_magic != MSG_MAGIC) {
-			msgbuf.msg_bufx = 0;
+			register int i;
+
 			msgbuf.msg_magic = MSG_MAGIC;
+			msgbuf.msg_bufx = msgbuf.msg_bufr = 0;
+			for (i=0; i < MSG_BSIZE; i++)
+				msgbuf.msg_bufc[i] = 0;
 		}
+		msgbuf.msg_bufc[msgbuf.msg_bufx++] = c;
 		if (msgbuf.msg_bufx < 0 || msgbuf.msg_bufx >= MSG_BSIZE)
 			msgbuf.msg_bufx = 0;
-		msgbuf.msg_bufc[msgbuf.msg_bufx++] = c;
 	}
-	if (c == 0)
-		return;
-	cnputc(c);
+		(*v_console)(c);
 }