--- /dev/null
+/*-
+ * Copyright (c) 1986, 1988, 1991 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.
+ *
+ * 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 7.30 (Berkeley) 6/29/91
+ */
+
+#include "param.h"
+#include "systm.h"
+#include "buf.h"
+#include "conf.h"
+#include "reboot.h"
+#include "msgbuf.h"
+#include "proc.h"
+#include "ioctl.h"
+#include "vnode.h"
+#include "file.h"
+#include "tty.h"
+#include "tprintf.h"
+#include "syslog.h"
+#include "malloc.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>
+
+#ifdef KADB
+#include "machine/kdbparam.h"
+#endif
+
+#define TOCONS 0x01
+#define TOTTY 0x02
+#define TOLOG 0x04
+
+struct tty *constty; /* pointer to console "window" tty */
+
+#ifdef KADB
+extern cngetc(); /* standard console getc */
+int (*v_getc)() = cngetc; /* "" getc from virtual console */
+extern cnpoll();
+int (*v_poll)() = cnpoll; /* kdb hook to enable input polling */
+#endif
+extern cnputc(); /* standard console putc */
+int (*v_putc)() = cnputc; /* routine to putc on virtual console */
+
+static void logpri __P((int level));
+static void putchar __P((int ch, int flags, struct tty *tp));
+static char *ksprintn __P((u_long num, int base, int *len));
+void kprintf __P((const char *fmt, int flags, struct tty *tp, va_list));
+
+/*
+ * Variable panicstr contains argument to first call to panic; used
+ * as flag to indicate that the kernel has already called panic.
+ */
+char *panicstr;
+
+/*
+ * Panic is called on unresolvable fatal errors. It prints "panic: mesg",
+ * and then reboots. If we are called twice, then we avoid trying to sync
+ * the disks as this often leads to recursive panics.
+ */
+void
+panic(msg)
+ char *msg;
+{
+ int bootopt = RB_AUTOBOOT | RB_DUMP;
+
+ if (panicstr)
+ bootopt |= RB_NOSYNC;
+ else
+ panicstr = msg;
+ printf("panic: %s\n", msg);
+#ifdef KGDB
+ kgdb_panic();
+#endif
+#ifdef KADB
+ if (boothowto & RB_KDB) {
+ int s;
+
+ s = splnet(); /* below kdb pri */
+ setsoftkdb();
+ splx(s);
+ }
+#endif
+#include "ddb.h"
+#if NDDB > 0
+ Debugger ();
+#else
+/* pg("press key to boot/dump");*/
+#endif
+ boot(bootopt);
+}
+
+/*
+ * Warn that a system table is full.
+ */
+void
+tablefull(tab)
+ 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
+#ifdef __STDC__
+uprintf(const char *fmt, ...)
+#else
+uprintf(fmt /*, va_alist */)
+ char *fmt;
+#endif
+{
+ register struct proc *p = curproc;
+ va_list ap;
+
+ if (p->p_flag & SCTTY && p->p_session->s_ttyvp) {
+ va_start(ap, fmt);
+ kprintf(fmt, TOTTY, p->p_session->s_ttyp, ap);
+ va_end(ap);
+ }
+}
+
+tpr_t
+tprintf_open(p)
+ register struct proc *p;
+{
+
+ if (p->p_flag & SCTTY && 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
+#ifdef __STDC__
+tprintf(tpr_t tpr, const char *fmt, ...)
+#else
+tprintf(tpr, fmt /*, va_alist */)
+ tpr_t tpr;
+ char *fmt;
+#endif
+{
+ register struct session *sess = (struct session *)tpr;
+ struct tty *tp = NULL;
+ int flags = TOLOG;
+ va_list ap;
+
+ logpri(LOG_INFO);
+ if (sess && sess->s_ttyvp && ttycheckoutq(sess->s_ttyp, 0)) {
+ flags |= TOTTY;
+ tp = sess->s_ttyp;
+ }
+ va_start(ap, fmt);
+ kprintf(fmt, flags, tp, 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
+#ifdef __STDC__
+ttyprintf(struct tty *tp, const char *fmt, ...)
+#else
+ttyprintf(tp, fmt /*, va_alist */)
+ struct tty *tp;
+ char *fmt;
+#endif
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ kprintf(fmt, TOTTY, tp, 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
+#ifdef __STDC__
+log(int level, const char *fmt, ...)
+#else
+log(level, fmt /*, va_alist */)
+ int level;
+ char *fmt;
+#endif
+{
+ register int s;
+ va_list ap;
+
+ s = splhigh();
+ logpri(level);
+ va_start(ap, fmt);
+ kprintf(fmt, TOLOG, NULL, ap);
+ splx(s);
+ va_end(ap);
+ if (!log_open) {
+ va_start(ap, fmt);
+ kprintf(fmt, TOCONS, NULL, ap);
+ va_end(ap);
+ }
+ logwakeup();
+}
+
+static void
+logpri(level)
+ int level;
+{
+ register int ch;
+ register char *p;
+
+ putchar('<', TOLOG, NULL);
+ for (p = ksprintn((u_long)level, 10, NULL); ch = *p--;)
+ putchar(ch, TOLOG, NULL);
+ putchar('>', TOLOG, NULL);
+}
+
+void
+#ifdef __STDC__
+addlog(const char *fmt, ...)
+#else
+addlog(fmt /*, va_alist */)
+ char *fmt;
+#endif
+{
+ register int s;
+ va_list ap;
+
+ s = splhigh();
+ va_start(ap, fmt);
+ kprintf(fmt, TOLOG, NULL, ap);
+ splx(s);
+ va_end(ap);
+ if (!log_open) {
+ va_start(ap, fmt);
+ kprintf(fmt, TOCONS, NULL, ap);
+ va_end(ap);
+ }
+ logwakeup();
+}
+
+int consintr = 1; /* ok to handle console interrupts? */
+
+void
+#ifdef __STDC__
+printf(const char *fmt, ...)
+#else
+printf(fmt /*, va_alist */)
+ char *fmt;
+#endif
+{
+ va_list ap;
+ register int savintr;
+
+ savintr = consintr; /* disable interrupts */
+ consintr = 0;
+ va_start(ap, fmt);
+ kprintf(fmt, TOCONS | TOLOG, NULL, ap);
+ va_end(ap);
+ if (!panicstr)
+ logwakeup();
+ consintr = savintr; /* reenable interrupts */
+}
+
+/*
+ * 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:
+ *
+ * printf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
+ *
+ * would produce output:
+ *
+ * reg=3<BITTWO,BITONE>
+ *
+ * The format %r is supposed to pass an additional format string and argument
+ * list recursively.
+ * Its usage is:
+ *
+ * fn(otherstuff, char *fmt, ...)
+ * {
+ * va_list ap;
+ * va_start(ap, fmt);
+ * printf("prefix: %r, other stuff\n", fmt, ap);
+ * va_end(ap);
+ *
+ * Space or zero padding and a field width are supported for the numeric
+ * formats only.
+ */
+void
+kprintf(fmt, flags, tp, ap)
+ register const char *fmt;
+ int flags;
+ struct tty *tp;
+ va_list ap;
+{
+ register char *p;
+ register int ch, n;
+ u_long ul;
+ int base, lflag, tmp, width;
+ char padc;
+
+ for (;;) {
+ padc = ' ';
+ width = 0;
+ while ((ch = *(u_char *)fmt++) != '%') {
+ if (ch == '\0')
+ return;
+ putchar(ch, flags, tp);
+ }
+ lflag = 0;
+reswitch: switch (ch = *(u_char *)fmt++) {
+ case '0':
+ padc = '0';
+ goto reswitch;
+ case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ for (width = 0;; ++fmt) {
+ width = width * 10 + ch - '0';
+ ch = *fmt;
+ if (ch < '0' || ch > '9')
+ break;
+ }
+ goto reswitch;
+ case 'l':
+ lflag = 1;
+ goto reswitch;
+ case 'b':
+ ul = va_arg(ap, int);
+ p = va_arg(ap, char *);
+ for (p = ksprintn(ul, *p++, NULL); ch = *p--;)
+ putchar(ch, flags, tp);
+
+ if (!ul)
+ break;
+
+ for (tmp = 0; n = *p++;) {
+ if (ul & (1 << (n - 1))) {
+ putchar(tmp ? ',' : '<', flags, tp);
+ for (; (n = *p) > ' '; ++p)
+ putchar(n, flags, tp);
+ tmp = 1;
+ } else
+ for (; *p > ' '; ++p);
+ }
+ if (tmp)
+ putchar('>', flags, tp);
+ break;
+ case 'c':
+ putchar(va_arg(ap, int), flags, tp);
+ break;
+ case 'r':
+ p = va_arg(ap, char *);
+ kprintf(p, flags, tp, va_arg(ap, va_list));
+ break;
+ case 's':
+ p = va_arg(ap, char *);
+ while (ch = *p++)
+ putchar(ch, flags, tp);
+ break;
+ case 'd':
+ ul = lflag ? va_arg(ap, long) : va_arg(ap, int);
+ if ((long)ul < 0) {
+ putchar('-', flags, tp);
+ ul = -(long)ul;
+ }
+ base = 10;
+ goto number;
+ case 'o':
+ ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
+ base = 8;
+ goto number;
+ 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: p = ksprintn(ul, base, &tmp);
+ if (width && (width -= tmp) > 0)
+ while (width--)
+ putchar(padc, flags, tp);
+ while (ch = *p--)
+ putchar(ch, flags, tp);
+ break;
+ default:
+ putchar('%', flags, tp);
+ if (lflag)
+ putchar('l', flags, tp);
+ /* FALLTHROUGH */
+ case '%':
+ putchar(ch, flags, tp);
+ }
+ }
+}
+
+/*
+ * 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(c, flags, tp)
+ register int c;
+ int flags;
+ struct tty *tp;
+{
+ extern int msgbufmapped;
+ register struct msgbuf *mbp;
+
+ 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) &&
+ c != '\0' && c != '\r' && c != 0177 && msgbufmapped) {
+ mbp = msgbufp;
+ if (mbp->msg_magic != MSG_MAGIC) {
+ bzero((caddr_t)mbp, sizeof(*mbp));
+ mbp->msg_magic = MSG_MAGIC;
+ }
+ mbp->msg_bufc[mbp->msg_bufx++] = c;
+ if (mbp->msg_bufx < 0 || mbp->msg_bufx >= MSG_BSIZE)
+ mbp->msg_bufx = 0;
+ }
+ if ((flags & TOCONS) && constty == NULL && c != '\0')
+ (*v_putc)(c);
+}
+
+/*
+ * Scaled down version of sprintf(3).
+ */
+#ifdef __STDC__
+sprintf(char *buf, const char *cfmt, ...)
+#else
+sprintf(buf, cfmt /*, va_alist */)
+ char *buf, *cfmt;
+#endif
+{
+ register const char *fmt = cfmt;
+ register char *p, *bp;
+ register int ch, base;
+ u_long ul;
+ int lflag;
+ va_list ap;
+
+ va_start(ap, cfmt);
+ for (bp = buf; ; ) {
+ while ((ch = *(u_char *)fmt++) != '%')
+ if ((*bp++ = ch) == '\0')
+ return ((bp - buf) - 1);
+
+ lflag = 0;
+reswitch: switch (ch = *(u_char *)fmt++) {
+ case 'l':
+ lflag = 1;
+ goto reswitch;
+ case 'c':
+ *bp++ = va_arg(ap, int);
+ break;
+ case 's':
+ p = va_arg(ap, char *);
+ while (*bp++ = *p++)
+ ;
+ --bp;
+ break;
+ case 'd':
+ ul = lflag ? va_arg(ap, long) : va_arg(ap, int);
+ if ((long)ul < 0) {
+ *bp++ = '-';
+ ul = -(long)ul;
+ }
+ base = 10;
+ goto number;
+ break;
+ case 'o':
+ ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
+ base = 8;
+ goto number;
+ break;
+ case 'u':
+ ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
+ base = 10;
+ goto number;
+ break;
+ case 'x':
+ ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
+ base = 16;
+number: for (p = ksprintn(ul, base, NULL); ch = *p--;)
+ *bp++ = ch;
+ break;
+ default:
+ *bp++ = '%';
+ if (lflag)
+ *bp++ = 'l';
+ /* FALLTHROUGH */
+ case '%':
+ *bp++ = ch;
+ }
+ }
+ va_end(ap);
+}
+
+/*
+ * 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 = "0123456789abcdef"[ul % base];
+ } while (ul /= base);
+ if (lenp)
+ *lenp = p - buf;
+ return (p);
+}
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