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-rw-r--r--sys/kern/subr_prf.c607
1 files changed, 607 insertions, 0 deletions
diff --git a/sys/kern/subr_prf.c b/sys/kern/subr_prf.c
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--- /dev/null
+++ b/sys/kern/subr_prf.c
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+/*-
+ * Copyright (c) 1986, 1988, 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * @(#)subr_prf.c 8.3 (Berkeley) 1/21/94
+ * $FreeBSD$
+ */
+
+#include "opt_ddb.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/msgbuf.h>
+#include <sys/proc.h>
+#include <sys/tty.h>
+#include <sys/tprintf.h>
+#include <sys/syslog.h>
+#include <sys/malloc.h>
+#include <machine/cons.h>
+
+/*
+ * Note that stdarg.h and the ANSI style va_start macro is used for both
+ * ANSI and traditional C compilers.
+ */
+#include <machine/stdarg.h>
+
+#define TOCONS 0x01
+#define TOTTY 0x02
+#define TOLOG 0x04
+
+struct tty *constty; /* pointer to console "window" tty */
+
+static void (*v_putc)(int) = cnputc; /* routine to putc on virtual console */
+static void logpri __P((int level));
+static void msglogchar(int c, void *dummyarg);
+struct putchar_arg {int flags; struct tty *tty; };
+static void putchar __P((int ch, void *arg));
+static char *ksprintn __P((u_long num, int base, int *len));
+
+static int consintr = 1; /* Ok to handle console interrupts? */
+
+/*
+ * Warn that a system table is full.
+ */
+void
+tablefull(tab)
+ const char *tab;
+{
+
+ log(LOG_ERR, "%s: table is full\n", tab);
+}
+
+/*
+ * Uprintf prints to the controlling terminal for the current process.
+ * It may block if the tty queue is overfull. No message is printed if
+ * the queue does not clear in a reasonable time.
+ */
+void
+uprintf(const char *fmt, ...)
+{
+ struct proc *p = curproc;
+ va_list ap;
+ struct putchar_arg pca;
+
+ if (p->p_flag & P_CONTROLT && p->p_session->s_ttyvp) {
+ va_start(ap, fmt);
+ pca.tty = p->p_session->s_ttyp;
+ pca.flags = TOTTY;
+ kvprintf(fmt, putchar, &pca, 10, ap);
+ va_end(ap);
+ }
+}
+
+tpr_t
+tprintf_open(p)
+ register struct proc *p;
+{
+
+ if (p->p_flag & P_CONTROLT && p->p_session->s_ttyvp) {
+ SESSHOLD(p->p_session);
+ return ((tpr_t) p->p_session);
+ }
+ return ((tpr_t) NULL);
+}
+
+void
+tprintf_close(sess)
+ tpr_t sess;
+{
+
+ if (sess)
+ SESSRELE((struct session *) sess);
+}
+
+/*
+ * tprintf prints on the controlling terminal associated
+ * with the given session.
+ */
+void
+tprintf(tpr_t tpr, const char *fmt, ...)
+{
+ register struct session *sess = (struct session *)tpr;
+ struct tty *tp = NULL;
+ int flags = TOLOG;
+ va_list ap;
+ struct putchar_arg pca;
+
+ logpri(LOG_INFO);
+ if (sess && sess->s_ttyvp && ttycheckoutq(sess->s_ttyp, 0)) {
+ flags |= TOTTY;
+ tp = sess->s_ttyp;
+ }
+ va_start(ap, fmt);
+ pca.tty = tp;
+ pca.flags = flags;
+ kvprintf(fmt, putchar, &pca, 10, ap);
+ va_end(ap);
+ logwakeup();
+}
+
+/*
+ * Ttyprintf displays a message on a tty; it should be used only by
+ * the tty driver, or anything that knows the underlying tty will not
+ * be revoke(2)'d away. Other callers should use tprintf.
+ */
+void
+ttyprintf(struct tty *tp, const char *fmt, ...)
+{
+ va_list ap;
+ struct putchar_arg pca;
+ va_start(ap, fmt);
+ pca.tty = tp;
+ pca.flags = TOTTY;
+ kvprintf(fmt, putchar, &pca, 10, ap);
+ va_end(ap);
+}
+
+extern int log_open;
+
+/*
+ * 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.
+ */
+void
+log(int level, const char *fmt, ...)
+{
+ register int s;
+ va_list ap;
+
+ s = splhigh();
+ logpri(level);
+ va_start(ap, fmt);
+
+ kvprintf(fmt, msglogchar, NULL, 10, ap);
+ va_end(ap);
+
+ splx(s);
+ if (!log_open) {
+ struct putchar_arg pca;
+ va_start(ap, fmt);
+ pca.tty = NULL;
+ pca.flags = TOCONS;
+ kvprintf(fmt, putchar, &pca, 10, ap);
+ va_end(ap);
+ }
+ logwakeup();
+}
+
+static void
+logpri(level)
+ int level;
+{
+ register char *p;
+
+ msglogchar('<', NULL);
+ for (p = ksprintn((u_long)level, 10, NULL); *p;)
+ msglogchar(*p--, NULL);
+ msglogchar('>', NULL);
+}
+
+int
+addlog(const char *fmt, ...)
+{
+ register int s;
+ va_list ap;
+ int retval;
+
+ s = splhigh();
+ va_start(ap, fmt);
+ retval = kvprintf(fmt, msglogchar, NULL, 10, ap);
+ splx(s);
+ va_end(ap);
+ if (!log_open) {
+ struct putchar_arg pca;
+ va_start(ap, fmt);
+ pca.tty = NULL;
+ pca.flags = TOCONS;
+ kvprintf(fmt, putchar, &pca, 10, ap);
+ va_end(ap);
+ }
+ logwakeup();
+ return (retval);
+}
+
+int
+printf(const char *fmt, ...)
+{
+ va_list ap;
+ register int savintr;
+ struct putchar_arg pca;
+ int retval;
+
+ savintr = consintr; /* disable interrupts */
+ consintr = 0;
+ va_start(ap, fmt);
+ pca.tty = NULL;
+ pca.flags = TOCONS | TOLOG;
+ retval = kvprintf(fmt, putchar, &pca, 10, ap);
+ va_end(ap);
+ if (!panicstr)
+ logwakeup();
+ consintr = savintr; /* reenable interrupts */
+ return retval;
+}
+
+void
+vprintf(const char *fmt, va_list ap)
+{
+ register int savintr;
+ struct putchar_arg pca;
+
+ savintr = consintr; /* disable interrupts */
+ consintr = 0;
+ pca.tty = NULL;
+ pca.flags = TOCONS | TOLOG;
+ kvprintf(fmt, putchar, &pca, 10, ap);
+ if (!panicstr)
+ logwakeup();
+ consintr = savintr; /* reenable interrupts */
+}
+
+/*
+ * Print a character on console or users terminal. If destination is
+ * the console then the last MSGBUFS characters are saved in msgbuf for
+ * inspection later.
+ */
+static void
+putchar(int c, void *arg)
+{
+ struct putchar_arg *ap = (struct putchar_arg*) arg;
+ int flags = ap->flags;
+ struct tty *tp = ap->tty;
+ if (panicstr)
+ constty = NULL;
+ if ((flags & TOCONS) && tp == NULL && constty) {
+ tp = constty;
+ flags |= TOTTY;
+ }
+ if ((flags & TOTTY) && tp && tputchar(c, tp) < 0 &&
+ (flags & TOCONS) && tp == constty)
+ constty = NULL;
+ if ((flags & TOLOG))
+ msglogchar(c, NULL);
+ if ((flags & TOCONS) && constty == NULL && c != '\0')
+ (*v_putc)(c);
+}
+
+/*
+ * Scaled down version of sprintf(3).
+ */
+int
+sprintf(char *buf, const char *cfmt, ...)
+{
+ int retval;
+ va_list ap;
+
+ va_start(ap, cfmt);
+ retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
+ buf[retval] = '\0';
+ va_end(ap);
+ return retval;
+}
+
+/*
+ * Put a number (base <= 16) in a buffer in reverse order; return an
+ * optional length and a pointer to the NULL terminated (preceded?)
+ * buffer.
+ */
+static char *
+ksprintn(ul, base, lenp)
+ register u_long ul;
+ register int base, *lenp;
+{ /* A long in base 8, plus NULL. */
+ static char buf[sizeof(long) * NBBY / 3 + 2];
+ register char *p;
+
+ p = buf;
+ do {
+ *++p = hex2ascii(ul % base);
+ } while (ul /= base);
+ if (lenp)
+ *lenp = p - buf;
+ return (p);
+}
+
+/*
+ * Scaled down version of printf(3).
+ *
+ * Two additional formats:
+ *
+ * The format %b is supported to decode error registers.
+ * Its usage is:
+ *
+ * printf("reg=%b\n", regval, "<base><arg>*");
+ *
+ * where <base> is the output base expressed as a control character, e.g.
+ * \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
+ * the first of which gives the bit number to be inspected (origin 1), and
+ * the next characters (up to a control character, i.e. a character <= 32),
+ * give the name of the register. Thus:
+ *
+ * kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
+ *
+ * would produce output:
+ *
+ * reg=3<BITTWO,BITONE>
+ *
+ * XXX: %D -- Hexdump, takes pointer and separator string:
+ * ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX
+ * ("%*D", len, ptr, " " -> XX XX XX XX ...
+ */
+int
+kvprintf(char const *fmt, void (*func)(int, void*), void *arg, int radix, va_list ap)
+{
+#define PCHAR(c) {int cc=(c); if (func) (*func)(cc,arg); else *d++ = cc; retval++; }
+ char *p, *q, *d;
+ u_char *up;
+ int ch, n;
+ u_long ul;
+ int base, lflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
+ int dwidth;
+ char padc;
+ int retval = 0;
+
+ if (!func)
+ d = (char *) arg;
+ else
+ d = NULL;
+
+ if (fmt == NULL)
+ fmt = "(fmt null)\n";
+
+ if (radix < 2 || radix > 36)
+ radix = 10;
+
+ for (;;) {
+ padc = ' ';
+ width = 0;
+ while ((ch = (u_char)*fmt++) != '%') {
+ if (ch == '\0')
+ return retval;
+ PCHAR(ch);
+ }
+ lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
+ sign = 0; dot = 0; dwidth = 0;
+reswitch: switch (ch = (u_char)*fmt++) {
+ case '.':
+ dot = 1;
+ goto reswitch;
+ case '#':
+ sharpflag = 1;
+ goto reswitch;
+ case '+':
+ sign = 1;
+ goto reswitch;
+ case '-':
+ ladjust = 1;
+ goto reswitch;
+ case '%':
+ PCHAR(ch);
+ break;
+ case '*':
+ if (!dot) {
+ width = va_arg(ap, int);
+ if (width < 0) {
+ ladjust = !ladjust;
+ width = -width;
+ }
+ } else {
+ dwidth = va_arg(ap, int);
+ }
+ goto reswitch;
+ case '0':
+ if (!dot) {
+ padc = '0';
+ goto reswitch;
+ }
+ case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ for (n = 0;; ++fmt) {
+ n = n * 10 + ch - '0';
+ ch = *fmt;
+ if (ch < '0' || ch > '9')
+ break;
+ }
+ if (dot)
+ dwidth = n;
+ else
+ width = n;
+ goto reswitch;
+ case 'b':
+ ul = va_arg(ap, int);
+ p = va_arg(ap, char *);
+ for (q = ksprintn(ul, *p++, NULL); *q;)
+ PCHAR(*q--);
+
+ if (!ul)
+ break;
+
+ for (tmp = 0; *p;) {
+ n = *p++;
+ if (ul & (1 << (n - 1))) {
+ PCHAR(tmp ? ',' : '<');
+ for (; (n = *p) > ' '; ++p)
+ PCHAR(n);
+ tmp = 1;
+ } else
+ for (; *p > ' '; ++p)
+ continue;
+ }
+ if (tmp)
+ PCHAR('>');
+ break;
+ case 'c':
+ PCHAR(va_arg(ap, int));
+ break;
+ case 'D':
+ up = va_arg(ap, u_char *);
+ p = va_arg(ap, char *);
+ if (!width)
+ width = 16;
+ while(width--) {
+ PCHAR(hex2ascii(*up >> 4));
+ PCHAR(hex2ascii(*up & 0x0f));
+ up++;
+ if (width)
+ for (q=p;*q;q++)
+ PCHAR(*q);
+ }
+ break;
+ case 'd':
+ ul = lflag ? va_arg(ap, long) : va_arg(ap, int);
+ sign = 1;
+ base = 10;
+ goto number;
+ case 'l':
+ lflag = 1;
+ goto reswitch;
+ case 'n':
+ ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
+ base = radix;
+ goto number;
+ case 'o':
+ ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
+ base = 8;
+ goto number;
+ case 'p':
+ ul = (u_long)va_arg(ap, void *);
+ base = 16;
+ PCHAR('0');
+ PCHAR('x');
+ goto number;
+ case 's':
+ p = va_arg(ap, char *);
+ if (p == NULL)
+ p = "(null)";
+ if (!dot)
+ n = strlen (p);
+ else
+ for (n = 0; n < dwidth && p[n]; n++)
+ continue;
+
+ width -= n;
+
+ if (!ladjust && width > 0)
+ while (width--)
+ PCHAR(padc);
+ while (n--)
+ PCHAR(*p++);
+ if (ladjust && width > 0)
+ while (width--)
+ PCHAR(padc);
+ break;
+ case 'u':
+ ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
+ base = 10;
+ goto number;
+ case 'x':
+ ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
+ base = 16;
+number: if (sign && (long)ul < 0L) {
+ neg = 1;
+ ul = -(long)ul;
+ }
+ p = ksprintn(ul, base, &tmp);
+ if (sharpflag && ul != 0) {
+ if (base == 8)
+ tmp++;
+ else if (base == 16)
+ tmp += 2;
+ }
+ if (neg)
+ tmp++;
+
+ if (!ladjust && width && (width -= tmp) > 0)
+ while (width--)
+ PCHAR(padc);
+ if (neg)
+ PCHAR('-');
+ if (sharpflag && ul != 0) {
+ if (base == 8) {
+ PCHAR('0');
+ } else if (base == 16) {
+ PCHAR('0');
+ PCHAR('x');
+ }
+ }
+
+ while (*p)
+ PCHAR(*p--);
+
+ if (ladjust && width && (width -= tmp) > 0)
+ while (width--)
+ PCHAR(padc);
+
+ break;
+ default:
+ PCHAR('%');
+ if (lflag)
+ PCHAR('l');
+ PCHAR(ch);
+ break;
+ }
+ }
+#undef PCHAR
+}
+
+/*
+ * Put character in log buffer.
+ */
+static void
+msglogchar(int c, void *dummyarg)
+{
+ struct msgbuf *mbp;
+
+ if (c != '\0' && c != '\r' && c != 0177 && msgbufmapped) {
+ mbp = msgbufp;
+ if (mbp->msg_magic != MSG_MAGIC ||
+ mbp->msg_bufx >= MSG_BSIZE ||
+ mbp->msg_bufr >= MSG_BSIZE) {
+ bzero(mbp, sizeof(struct msgbuf));
+ mbp->msg_magic = MSG_MAGIC;
+ }
+ mbp->msg_bufc[mbp->msg_bufx++] = c;
+ if (mbp->msg_bufx >= MSG_BSIZE)
+ mbp->msg_bufx = 0;
+ /* If the buffer is full, keep the most recent data. */
+ if (mbp->msg_bufr == mbp->msg_bufx) {
+ if (++mbp->msg_bufr >= MSG_BSIZE)
+ mbp->msg_bufr = 0;
+ }
+ }
+}
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