f53dbe9765
in the wrong place. Blank padding in the right place or zero padding would be inconsistent with user mode. Put case 'p' in alphabetical order. Implement %p in sprintf() too. I'd like only a single, more complete printf() core, perhaps one based on vsnprintf().
626 lines
14 KiB
C
626 lines
14 KiB
C
/*-
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* Copyright (c) 1986, 1988, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)subr_prf.c 8.3 (Berkeley) 1/21/94
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* $Id: subr_prf.c,v 1.13 1995/04/08 21:32:11 joerg Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/conf.h>
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#include <sys/reboot.h>
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#include <sys/msgbuf.h>
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#include <sys/proc.h>
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#include <sys/ioctl.h>
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#include <sys/vnode.h>
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#include <sys/file.h>
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#include <sys/tty.h>
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#include <sys/tprintf.h>
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#include <sys/syslog.h>
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#include <sys/malloc.h>
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#include <machine/cons.h>
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/*
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* Note that stdarg.h and the ANSI style va_start macro is used for both
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* ANSI and traditional C compilers.
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*/
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#include <machine/stdarg.h>
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#ifdef KADB
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#include <machine/kdbparam.h>
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#endif
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#define TOCONS 0x01
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#define TOTTY 0x02
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#define TOLOG 0x04
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struct tty *constty; /* pointer to console "window" tty */
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void (*v_putc)(int) = cnputc; /* routine to putc on virtual console */
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void logpri __P((int level));
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static void putchar __P((int ch, int flags, struct tty *tp));
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static char *ksprintn __P((u_long num, int base, int *len));
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int consintr = 1; /* Ok to handle console interrupts? */
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/*
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* Variable panicstr contains argument to first call to panic; used as flag
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* to indicate that the kernel has already called panic.
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*/
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const char *panicstr;
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/*
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* Panic is called on unresolvable fatal errors. It prints "panic: mesg",
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* and then reboots. If we are called twice, then we avoid trying to sync
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* the disks as this often leads to recursive panics.
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*/
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#ifdef __GNUC__
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__dead /* panic() does not return */
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#endif
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void
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#ifdef __STDC__
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panic(const char *fmt, ...)
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#else
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panic(fmt, va_alist)
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char *fmt;
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#endif
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{
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int bootopt;
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va_list ap;
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bootopt = RB_AUTOBOOT | RB_DUMP;
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if (panicstr)
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bootopt |= RB_NOSYNC;
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else
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panicstr = fmt;
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va_start(ap, fmt);
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printf("panic: %r\n", fmt, ap);
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va_end(ap);
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#ifdef KGDB
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kgdb_panic();
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#endif
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#ifdef KADB
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if (boothowto & RB_KDB)
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kdbpanic();
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#endif
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#ifdef DDB
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Debugger ("panic");
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#endif
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boot(bootopt);
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}
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/*
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* Warn that a system table is full.
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*/
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void
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tablefull(tab)
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const char *tab;
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{
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log(LOG_ERR, "%s: table is full\n", tab);
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}
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/*
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* Uprintf prints to the controlling terminal for the current process.
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* It may block if the tty queue is overfull. No message is printed if
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* the queue does not clear in a reasonable time.
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*/
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void
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#ifdef __STDC__
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uprintf(const char *fmt, ...)
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#else
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uprintf(fmt, va_alist)
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char *fmt;
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#endif
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{
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register struct proc *p = curproc;
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va_list ap;
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if (p->p_flag & P_CONTROLT && p->p_session->s_ttyvp) {
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va_start(ap, fmt);
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kprintf(fmt, TOTTY, p->p_session->s_ttyp, ap);
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va_end(ap);
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}
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}
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tpr_t
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tprintf_open(p)
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register struct proc *p;
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{
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if (p->p_flag & P_CONTROLT && p->p_session->s_ttyvp) {
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SESSHOLD(p->p_session);
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return ((tpr_t) p->p_session);
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}
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return ((tpr_t) NULL);
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}
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void
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tprintf_close(sess)
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tpr_t sess;
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{
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if (sess)
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SESSRELE((struct session *) sess);
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}
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/*
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* tprintf prints on the controlling terminal associated
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* with the given session.
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*/
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void
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#ifdef __STDC__
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tprintf(tpr_t tpr, const char *fmt, ...)
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#else
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tprintf(tpr, fmt, va_alist)
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tpr_t tpr;
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char *fmt;
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#endif
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{
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register struct session *sess = (struct session *)tpr;
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struct tty *tp = NULL;
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int flags = TOLOG;
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va_list ap;
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logpri(LOG_INFO);
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if (sess && sess->s_ttyvp && ttycheckoutq(sess->s_ttyp, 0)) {
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flags |= TOTTY;
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tp = sess->s_ttyp;
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}
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va_start(ap, fmt);
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kprintf(fmt, flags, tp, ap);
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va_end(ap);
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logwakeup();
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}
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/*
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* Ttyprintf displays a message on a tty; it should be used only by
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* the tty driver, or anything that knows the underlying tty will not
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* be revoke(2)'d away. Other callers should use tprintf.
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*/
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void
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#ifdef __STDC__
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ttyprintf(struct tty *tp, const char *fmt, ...)
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#else
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ttyprintf(tp, fmt, va_alist)
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struct tty *tp;
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char *fmt;
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#endif
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{
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va_list ap;
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va_start(ap, fmt);
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kprintf(fmt, TOTTY, tp, ap);
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va_end(ap);
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}
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extern int log_open;
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/*
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* Log writes to the log buffer, and guarantees not to sleep (so can be
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* called by interrupt routines). If there is no process reading the
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* log yet, it writes to the console also.
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*/
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void
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#ifdef __STDC__
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log(int level, const char *fmt, ...)
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#else
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log(level, fmt, va_alist)
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int level;
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char *fmt;
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#endif
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{
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register int s;
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va_list ap;
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s = splhigh();
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logpri(level);
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va_start(ap, fmt);
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kprintf(fmt, TOLOG, NULL, ap);
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splx(s);
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va_end(ap);
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if (!log_open) {
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va_start(ap, fmt);
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kprintf(fmt, TOCONS, NULL, ap);
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va_end(ap);
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}
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logwakeup();
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}
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void
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logpri(level)
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int level;
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{
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register char *p;
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putchar('<', TOLOG, NULL);
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for (p = ksprintn((u_long)level, 10, NULL); *p;)
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putchar(*p--, TOLOG, NULL);
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putchar('>', TOLOG, NULL);
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}
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void
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#ifdef __STDC__
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addlog(const char *fmt, ...)
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#else
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addlog(fmt, va_alist)
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char *fmt;
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#endif
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{
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register int s;
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va_list ap;
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s = splhigh();
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va_start(ap, fmt);
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kprintf(fmt, TOLOG, NULL, ap);
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splx(s);
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va_end(ap);
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if (!log_open) {
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va_start(ap, fmt);
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kprintf(fmt, TOCONS, NULL, ap);
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va_end(ap);
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}
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logwakeup();
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}
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void
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#ifdef __STDC__
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printf(const char *fmt, ...)
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#else
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printf(fmt, va_alist)
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char *fmt;
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#endif
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{
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va_list ap;
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register int savintr;
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savintr = consintr; /* disable interrupts */
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consintr = 0;
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va_start(ap, fmt);
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kprintf(fmt, TOCONS | TOLOG, NULL, ap);
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va_end(ap);
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if (!panicstr)
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logwakeup();
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consintr = savintr; /* reenable interrupts */
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}
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/*
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* Scaled down version of printf(3).
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*
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* Two additional formats:
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*
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* The format %b is supported to decode error registers.
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* Its usage is:
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|
*
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* printf("reg=%b\n", regval, "<base><arg>*");
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*
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* where <base> is the output base expressed as a control character, e.g.
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* \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
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* the first of which gives the bit number to be inspected (origin 1), and
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* the next characters (up to a control character, i.e. a character <= 32),
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* give the name of the register. Thus:
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*
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* kprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
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*
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* would produce output:
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*
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* reg=3<BITTWO,BITONE>
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*
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|
* The format %r passes an additional format string and argument list
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|
* recursively. Its usage is:
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|
*
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* fn(char *fmt, ...)
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|
* {
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|
* va_list ap;
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|
* va_start(ap, fmt);
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|
* printf("prefix: %r: suffix\n", fmt, ap);
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|
* va_end(ap);
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|
* }
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|
*
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* Space or zero padding and a field width are supported for the numeric
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* formats only.
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*/
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|
void
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kprintf(fmt, flags, tp, ap)
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register const char *fmt;
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int flags;
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struct tty *tp;
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va_list ap;
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{
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register char *p, *q;
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|
register int ch, n;
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u_long ul;
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int base, lflag, tmp, width;
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char padc;
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|
if (fmt == NULL)
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fmt = "(fmt null)\n";
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for (;;) {
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padc = ' ';
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width = 0;
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while ((ch = *(u_char *)fmt++) != '%') {
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if (ch == '\0')
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return;
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putchar(ch, flags, tp);
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}
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lflag = 0;
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reswitch: switch (ch = *(u_char *)fmt++) {
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case '0':
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padc = '0';
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goto reswitch;
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case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
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for (width = 0;; ++fmt) {
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width = width * 10 + ch - '0';
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ch = *fmt;
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if (ch < '0' || ch > '9')
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break;
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|
}
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goto reswitch;
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case 'l':
|
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lflag = 1;
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goto reswitch;
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case 'b':
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ul = va_arg(ap, int);
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p = va_arg(ap, char *);
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for (q = ksprintn(ul, *p++, NULL); *q;)
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putchar(*q--, flags, tp);
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|
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if (!ul)
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break;
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for (tmp = 0; *p;) {
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n = *p++;
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if (ul & (1 << (n - 1))) {
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putchar(tmp ? ',' : '<', flags, tp);
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for (; (n = *p) > ' '; ++p)
|
|
putchar(n, flags, tp);
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tmp = 1;
|
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} else
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for (; *p > ' '; ++p)
|
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continue;
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|
}
|
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if (tmp)
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putchar('>', flags, tp);
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break;
|
|
case 'c':
|
|
putchar(va_arg(ap, int), flags, tp);
|
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break;
|
|
case 'r':
|
|
p = va_arg(ap, char *);
|
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kprintf(p, flags, tp, va_arg(ap, va_list));
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break;
|
|
case 's':
|
|
p = va_arg(ap, char *);
|
|
if (p == NULL)
|
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p = "(null)";
|
|
while (*p)
|
|
putchar(*p++, flags, tp);
|
|
break;
|
|
case 'd':
|
|
ul = lflag ? va_arg(ap, long) : va_arg(ap, int);
|
|
if ((long)ul < 0) {
|
|
putchar('-', flags, tp);
|
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ul = -(long)ul;
|
|
}
|
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base = 10;
|
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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;
|
|
putchar('0', flags, tp);
|
|
putchar('x', flags, tp);
|
|
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 (*p)
|
|
putchar(*p--, 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;
|
|
{
|
|
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 >= MSG_BSIZE)
|
|
mbp->msg_bufx = 0;
|
|
if (mbp->msg_bufr == mbp->msg_bufx) {
|
|
mbp->msg_bufr++;
|
|
if (mbp->msg_bufr >= MSG_BSIZE)
|
|
mbp->msg_bufr = 0;
|
|
}
|
|
}
|
|
if ((flags & TOCONS) && constty == NULL && c != '\0')
|
|
(*v_putc)(c);
|
|
}
|
|
|
|
/*
|
|
* Scaled down version of sprintf(3).
|
|
*/
|
|
#ifdef __STDC__
|
|
int
|
|
sprintf(char *buf, const char *cfmt, ...)
|
|
#else
|
|
int
|
|
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 (*p)
|
|
*bp++ = *p++;
|
|
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 'p':
|
|
ul = (u_long)va_arg(ap, void *);
|
|
base = 16;
|
|
*bp++ = '0';
|
|
*bp++ = 'x';
|
|
goto number;
|
|
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); *p;)
|
|
*bp++ = *p--;
|
|
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);
|
|
}
|