This is not completely exhaustive, but covers a large majority of commands in the tree. Reviewed by: markj Sponsored by: Juniper Networks, Inc. Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D35583
1335 lines
28 KiB
C
1335 lines
28 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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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. 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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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifdef _KERNEL
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#include "opt_ddb.h"
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#include "opt_printf.h"
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#endif /* _KERNEL */
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#include <sys/param.h>
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#ifdef _KERNEL
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#include <sys/systm.h>
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#include <sys/lock.h>
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#include <sys/kdb.h>
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#include <sys/mutex.h>
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#include <sys/sx.h>
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#include <sys/kernel.h>
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#include <sys/msgbuf.h>
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#include <sys/malloc.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/stddef.h>
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#include <sys/sysctl.h>
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#include <sys/tty.h>
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#include <sys/syslog.h>
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#include <sys/cons.h>
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#include <sys/uio.h>
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#else /* !_KERNEL */
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#include <errno.h>
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#endif
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#include <sys/ctype.h>
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#include <sys/sbuf.h>
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#ifdef DDB
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#include <ddb/ddb.h>
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#endif
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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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#ifdef _KERNEL
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#include <machine/stdarg.h>
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#else
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#include <stdarg.h>
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#endif
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/*
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* This is needed for sbuf_putbuf() when compiled into userland. Due to the
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* shared nature of this file, it's the only place to put it.
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*/
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#ifndef _KERNEL
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#include <stdio.h>
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#endif
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#ifdef _KERNEL
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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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/* Max number conversion buffer length: a u_quad_t in base 2, plus NUL byte. */
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#define MAXNBUF (sizeof(intmax_t) * NBBY + 1)
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struct putchar_arg {
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int flags;
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int pri;
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struct tty *tty;
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char *p_bufr;
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size_t n_bufr;
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char *p_next;
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size_t remain;
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};
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struct snprintf_arg {
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char *str;
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size_t remain;
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};
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extern int log_open;
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static void msglogchar(int c, int pri);
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static void msglogstr(char *str, int pri, int filter_cr);
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static void prf_putbuf(char *bufr, int flags, int pri);
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static void putchar(int ch, void *arg);
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static char *ksprintn(char *nbuf, uintmax_t num, int base, int *len, int upper);
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static void snprintf_func(int ch, void *arg);
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static bool msgbufmapped; /* Set when safe to use msgbuf */
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int msgbuftrigger;
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struct msgbuf *msgbufp;
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#ifndef BOOT_TAG_SZ
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#define BOOT_TAG_SZ 32
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#endif
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#ifndef BOOT_TAG
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/* Tag used to mark the start of a boot in dmesg */
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#define BOOT_TAG "---<<BOOT>>---"
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#endif
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static char current_boot_tag[BOOT_TAG_SZ + 1] = BOOT_TAG;
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SYSCTL_STRING(_kern, OID_AUTO, boot_tag, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
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current_boot_tag, 0, "Tag added to dmesg at start of boot");
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static int log_console_output = 1;
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SYSCTL_INT(_kern, OID_AUTO, log_console_output, CTLFLAG_RWTUN,
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&log_console_output, 0, "Duplicate console output to the syslog");
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/*
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* See the comment in log_console() below for more explanation of this.
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*/
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static int log_console_add_linefeed;
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SYSCTL_INT(_kern, OID_AUTO, log_console_add_linefeed, CTLFLAG_RWTUN,
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&log_console_add_linefeed, 0, "log_console() adds extra newlines");
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static int always_console_output;
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SYSCTL_INT(_kern, OID_AUTO, always_console_output, CTLFLAG_RWTUN,
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&always_console_output, 0, "Always output to console despite TIOCCONS");
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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(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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*/
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int
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uprintf(const char *fmt, ...)
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{
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va_list ap;
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struct putchar_arg pca;
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struct proc *p;
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struct thread *td;
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int retval;
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td = curthread;
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if (TD_IS_IDLETHREAD(td))
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return (0);
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if (td->td_proc == initproc) {
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/* Produce output when we fail to load /sbin/init: */
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va_start(ap, fmt);
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retval = vprintf(fmt, ap);
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va_end(ap);
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return (retval);
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}
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sx_slock(&proctree_lock);
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p = td->td_proc;
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PROC_LOCK(p);
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if ((p->p_flag & P_CONTROLT) == 0) {
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PROC_UNLOCK(p);
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sx_sunlock(&proctree_lock);
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return (0);
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}
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SESS_LOCK(p->p_session);
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pca.tty = p->p_session->s_ttyp;
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SESS_UNLOCK(p->p_session);
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PROC_UNLOCK(p);
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if (pca.tty == NULL) {
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sx_sunlock(&proctree_lock);
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return (0);
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}
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pca.flags = TOTTY;
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pca.p_bufr = NULL;
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va_start(ap, fmt);
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tty_lock(pca.tty);
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sx_sunlock(&proctree_lock);
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retval = kvprintf(fmt, putchar, &pca, 10, ap);
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tty_unlock(pca.tty);
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va_end(ap);
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return (retval);
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}
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/*
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* tprintf and vtprintf print on the controlling terminal associated with the
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* given session, possibly to the log as well.
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*/
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void
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tprintf(struct proc *p, int pri, const 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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vtprintf(p, pri, fmt, ap);
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va_end(ap);
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}
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void
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vtprintf(struct proc *p, int pri, const char *fmt, va_list ap)
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{
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struct tty *tp = NULL;
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int flags = 0;
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struct putchar_arg pca;
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struct session *sess = NULL;
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sx_slock(&proctree_lock);
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if (pri != -1)
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flags |= TOLOG;
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if (p != NULL) {
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PROC_LOCK(p);
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if (p->p_flag & P_CONTROLT && p->p_session->s_ttyvp) {
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sess = p->p_session;
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sess_hold(sess);
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PROC_UNLOCK(p);
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tp = sess->s_ttyp;
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if (tp != NULL && tty_checkoutq(tp))
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flags |= TOTTY;
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else
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tp = NULL;
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} else
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PROC_UNLOCK(p);
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}
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pca.pri = pri;
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pca.tty = tp;
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pca.flags = flags;
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pca.p_bufr = NULL;
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if (pca.tty != NULL)
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tty_lock(pca.tty);
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sx_sunlock(&proctree_lock);
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kvprintf(fmt, putchar, &pca, 10, ap);
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if (pca.tty != NULL)
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tty_unlock(pca.tty);
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if (sess != NULL)
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sess_release(sess);
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msgbuftrigger = 1;
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}
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static int
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_vprintf(int level, int flags, const char *fmt, va_list ap)
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{
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struct putchar_arg pca;
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int retval;
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#ifdef PRINTF_BUFR_SIZE
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char bufr[PRINTF_BUFR_SIZE];
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#endif
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TSENTER();
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pca.tty = NULL;
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pca.pri = level;
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pca.flags = flags;
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#ifdef PRINTF_BUFR_SIZE
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pca.p_bufr = bufr;
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pca.p_next = pca.p_bufr;
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pca.n_bufr = sizeof(bufr);
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pca.remain = sizeof(bufr);
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*pca.p_next = '\0';
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#else
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/* Don't buffer console output. */
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pca.p_bufr = NULL;
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#endif
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retval = kvprintf(fmt, putchar, &pca, 10, ap);
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#ifdef PRINTF_BUFR_SIZE
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/* Write any buffered console/log output: */
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if (*pca.p_bufr != '\0')
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prf_putbuf(pca.p_bufr, flags, level);
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#endif
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TSEXIT();
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return (retval);
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}
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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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log(int level, const 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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vlog(level, fmt, ap);
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va_end(ap);
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}
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void
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vlog(int level, const char *fmt, va_list ap)
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{
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(void)_vprintf(level, log_open ? TOLOG : TOCONS | TOLOG, fmt, ap);
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msgbuftrigger = 1;
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}
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#define CONSCHUNK 128
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void
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log_console(struct uio *uio)
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{
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int c, error, nl;
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char *consbuffer;
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int pri;
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if (!log_console_output)
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return;
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pri = LOG_INFO | LOG_CONSOLE;
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uio = cloneuio(uio);
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consbuffer = malloc(CONSCHUNK, M_TEMP, M_WAITOK);
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nl = 0;
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while (uio->uio_resid > 0) {
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c = imin(uio->uio_resid, CONSCHUNK - 1);
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error = uiomove(consbuffer, c, uio);
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if (error != 0)
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break;
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/* Make sure we're NUL-terminated */
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consbuffer[c] = '\0';
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if (consbuffer[c - 1] == '\n')
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nl = 1;
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else
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nl = 0;
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msglogstr(consbuffer, pri, /*filter_cr*/ 1);
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}
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/*
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* The previous behavior in log_console() is preserved when
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* log_console_add_linefeed is non-zero. For that behavior, if an
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* individual console write came in that was not terminated with a
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* line feed, it would add a line feed.
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*
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* This results in different data in the message buffer than
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* appears on the system console (which doesn't add extra line feed
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* characters).
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*
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* A number of programs and rc scripts write a line feed, or a period
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* and a line feed when they have completed their operation. On
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* the console, this looks seamless, but when displayed with
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* 'dmesg -a', you wind up with output that looks like this:
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*
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* Updating motd:
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* .
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*
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* On the console, it looks like this:
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* Updating motd:.
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*
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* We could add logic to detect that situation, or just not insert
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* the extra newlines. Set the kern.log_console_add_linefeed
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* sysctl/tunable variable to get the old behavior.
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*/
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if (!nl && log_console_add_linefeed) {
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consbuffer[0] = '\n';
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consbuffer[1] = '\0';
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msglogstr(consbuffer, pri, /*filter_cr*/ 1);
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}
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msgbuftrigger = 1;
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free(uio, M_IOV);
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free(consbuffer, M_TEMP);
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}
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int
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printf(const char *fmt, ...)
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{
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va_list ap;
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int retval;
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va_start(ap, fmt);
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retval = vprintf(fmt, ap);
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va_end(ap);
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return (retval);
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}
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int
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vprintf(const char *fmt, va_list ap)
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{
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int retval;
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retval = _vprintf(-1, TOCONS | TOLOG, fmt, ap);
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if (!KERNEL_PANICKED())
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msgbuftrigger = 1;
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return (retval);
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}
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|
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static void
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prf_putchar(int c, int flags, int pri)
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{
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if (flags & TOLOG)
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msglogchar(c, pri);
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if (flags & TOCONS) {
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if ((!KERNEL_PANICKED()) && (constty != NULL))
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msgbuf_addchar(&consmsgbuf, c);
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if ((constty == NULL) || always_console_output)
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cnputc(c);
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}
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}
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|
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static void
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prf_putbuf(char *bufr, int flags, int pri)
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|
{
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if (flags & TOLOG)
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msglogstr(bufr, pri, /*filter_cr*/1);
|
|
|
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if (flags & TOCONS) {
|
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if ((!KERNEL_PANICKED()) && (constty != NULL))
|
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msgbuf_addstr(&consmsgbuf, -1,
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bufr, /*filter_cr*/ 0);
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|
|
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if ((constty == NULL) || always_console_output)
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cnputs(bufr);
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}
|
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}
|
|
|
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static void
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|
putbuf(int c, struct putchar_arg *ap)
|
|
{
|
|
/* Check if no console output buffer was provided. */
|
|
if (ap->p_bufr == NULL) {
|
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prf_putchar(c, ap->flags, ap->pri);
|
|
} else {
|
|
/* Buffer the character: */
|
|
*ap->p_next++ = c;
|
|
ap->remain--;
|
|
|
|
/* Always leave the buffer zero terminated. */
|
|
*ap->p_next = '\0';
|
|
|
|
/* Check if the buffer needs to be flushed. */
|
|
if (ap->remain == 2 || c == '\n') {
|
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prf_putbuf(ap->p_bufr, ap->flags, ap->pri);
|
|
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ap->p_next = ap->p_bufr;
|
|
ap->remain = ap->n_bufr;
|
|
*ap->p_next = '\0';
|
|
}
|
|
|
|
/*
|
|
* Since we fill the buffer up one character at a time,
|
|
* this should not happen. We should always catch it when
|
|
* ap->remain == 2 (if not sooner due to a newline), flush
|
|
* the buffer and move on. One way this could happen is
|
|
* if someone sets PRINTF_BUFR_SIZE to 1 or something
|
|
* similarly silly.
|
|
*/
|
|
KASSERT(ap->remain > 2, ("Bad buffer logic, remain = %zd",
|
|
ap->remain));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Print a character on console or users terminal. If destination is
|
|
* the console then the last bunch of characters are saved in msgbuf for
|
|
* inspection later.
|
|
*/
|
|
static void
|
|
putchar(int c, void *arg)
|
|
{
|
|
struct putchar_arg *ap = (struct putchar_arg*) arg;
|
|
struct tty *tp = ap->tty;
|
|
int flags = ap->flags;
|
|
|
|
/* Don't use the tty code after a panic or while in ddb. */
|
|
if (kdb_active) {
|
|
if (c != '\0')
|
|
cnputc(c);
|
|
return;
|
|
}
|
|
|
|
if ((flags & TOTTY) && tp != NULL && !KERNEL_PANICKED())
|
|
tty_putchar(tp, c);
|
|
|
|
if ((flags & (TOCONS | TOLOG)) && c != '\0')
|
|
putbuf(c, ap);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
/*
|
|
* Scaled down version of vsprintf(3).
|
|
*/
|
|
int
|
|
vsprintf(char *buf, const char *cfmt, va_list ap)
|
|
{
|
|
int retval;
|
|
|
|
retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
|
|
buf[retval] = '\0';
|
|
return (retval);
|
|
}
|
|
|
|
/*
|
|
* Scaled down version of snprintf(3).
|
|
*/
|
|
int
|
|
snprintf(char *str, size_t size, const char *format, ...)
|
|
{
|
|
int retval;
|
|
va_list ap;
|
|
|
|
va_start(ap, format);
|
|
retval = vsnprintf(str, size, format, ap);
|
|
va_end(ap);
|
|
return(retval);
|
|
}
|
|
|
|
/*
|
|
* Scaled down version of vsnprintf(3).
|
|
*/
|
|
int
|
|
vsnprintf(char *str, size_t size, const char *format, va_list ap)
|
|
{
|
|
struct snprintf_arg info;
|
|
int retval;
|
|
|
|
info.str = str;
|
|
info.remain = size;
|
|
retval = kvprintf(format, snprintf_func, &info, 10, ap);
|
|
if (info.remain >= 1)
|
|
*info.str++ = '\0';
|
|
return (retval);
|
|
}
|
|
|
|
/*
|
|
* Kernel version which takes radix argument vsnprintf(3).
|
|
*/
|
|
int
|
|
vsnrprintf(char *str, size_t size, int radix, const char *format, va_list ap)
|
|
{
|
|
struct snprintf_arg info;
|
|
int retval;
|
|
|
|
info.str = str;
|
|
info.remain = size;
|
|
retval = kvprintf(format, snprintf_func, &info, radix, ap);
|
|
if (info.remain >= 1)
|
|
*info.str++ = '\0';
|
|
return (retval);
|
|
}
|
|
|
|
static void
|
|
snprintf_func(int ch, void *arg)
|
|
{
|
|
struct snprintf_arg *const info = arg;
|
|
|
|
if (info->remain >= 2) {
|
|
*info->str++ = ch;
|
|
info->remain--;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse
|
|
* order; return an optional length and a pointer to the last character
|
|
* written in the buffer (i.e., the first character of the string).
|
|
* The buffer pointed to by `nbuf' must have length >= MAXNBUF.
|
|
*/
|
|
static char *
|
|
ksprintn(char *nbuf, uintmax_t num, int base, int *lenp, int upper)
|
|
{
|
|
char *p, c;
|
|
|
|
p = nbuf;
|
|
*p = '\0';
|
|
do {
|
|
c = hex2ascii(num % base);
|
|
*++p = upper ? toupper(c) : c;
|
|
} while (num /= base);
|
|
if (lenp)
|
|
*lenp = p - nbuf;
|
|
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");
|
|
*
|
|
* 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 nbuf[MAXNBUF];
|
|
char *d;
|
|
const char *p, *percent, *q;
|
|
u_char *up;
|
|
int ch, n;
|
|
uintmax_t num;
|
|
int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
|
|
int cflag, hflag, jflag, tflag, zflag;
|
|
int bconv, dwidth, upper;
|
|
char padc;
|
|
int stop = 0, retval = 0;
|
|
|
|
num = 0;
|
|
q = NULL;
|
|
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++) != '%' || stop) {
|
|
if (ch == '\0')
|
|
return (retval);
|
|
PCHAR(ch);
|
|
}
|
|
percent = fmt - 1;
|
|
qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
|
|
sign = 0; dot = 0; bconv = 0; dwidth = 0; upper = 0;
|
|
cflag = 0; hflag = 0; jflag = 0; tflag = 0; zflag = 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;
|
|
}
|
|
/* FALLTHROUGH */
|
|
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':
|
|
ladjust = 1;
|
|
bconv = 1;
|
|
goto handle_nosign;
|
|
case 'c':
|
|
width -= 1;
|
|
|
|
if (!ladjust && width > 0)
|
|
while (width--)
|
|
PCHAR(padc);
|
|
PCHAR(va_arg(ap, int));
|
|
if (ladjust && width > 0)
|
|
while (width--)
|
|
PCHAR(padc);
|
|
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':
|
|
case 'i':
|
|
base = 10;
|
|
sign = 1;
|
|
goto handle_sign;
|
|
case 'h':
|
|
if (hflag) {
|
|
hflag = 0;
|
|
cflag = 1;
|
|
} else
|
|
hflag = 1;
|
|
goto reswitch;
|
|
case 'j':
|
|
jflag = 1;
|
|
goto reswitch;
|
|
case 'l':
|
|
if (lflag) {
|
|
lflag = 0;
|
|
qflag = 1;
|
|
} else
|
|
lflag = 1;
|
|
goto reswitch;
|
|
case 'n':
|
|
/*
|
|
* We do not support %n in kernel, but consume the
|
|
* argument.
|
|
*/
|
|
if (jflag)
|
|
(void)va_arg(ap, intmax_t *);
|
|
else if (qflag)
|
|
(void)va_arg(ap, quad_t *);
|
|
else if (lflag)
|
|
(void)va_arg(ap, long *);
|
|
else if (zflag)
|
|
(void)va_arg(ap, size_t *);
|
|
else if (hflag)
|
|
(void)va_arg(ap, short *);
|
|
else if (cflag)
|
|
(void)va_arg(ap, char *);
|
|
else
|
|
(void)va_arg(ap, int *);
|
|
break;
|
|
case 'o':
|
|
base = 8;
|
|
goto handle_nosign;
|
|
case 'p':
|
|
base = 16;
|
|
sharpflag = (width == 0);
|
|
sign = 0;
|
|
num = (uintptr_t)va_arg(ap, void *);
|
|
goto number;
|
|
case 'q':
|
|
qflag = 1;
|
|
goto reswitch;
|
|
case 'r':
|
|
base = radix;
|
|
if (sign)
|
|
goto handle_sign;
|
|
goto handle_nosign;
|
|
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 't':
|
|
tflag = 1;
|
|
goto reswitch;
|
|
case 'u':
|
|
base = 10;
|
|
goto handle_nosign;
|
|
case 'X':
|
|
upper = 1;
|
|
/* FALLTHROUGH */
|
|
case 'x':
|
|
base = 16;
|
|
goto handle_nosign;
|
|
case 'y':
|
|
base = 16;
|
|
sign = 1;
|
|
goto handle_sign;
|
|
case 'z':
|
|
zflag = 1;
|
|
goto reswitch;
|
|
handle_nosign:
|
|
sign = 0;
|
|
if (jflag)
|
|
num = va_arg(ap, uintmax_t);
|
|
else if (qflag)
|
|
num = va_arg(ap, u_quad_t);
|
|
else if (tflag)
|
|
num = va_arg(ap, ptrdiff_t);
|
|
else if (lflag)
|
|
num = va_arg(ap, u_long);
|
|
else if (zflag)
|
|
num = va_arg(ap, size_t);
|
|
else if (hflag)
|
|
num = (u_short)va_arg(ap, int);
|
|
else if (cflag)
|
|
num = (u_char)va_arg(ap, int);
|
|
else
|
|
num = va_arg(ap, u_int);
|
|
if (bconv) {
|
|
q = va_arg(ap, char *);
|
|
base = *q++;
|
|
}
|
|
goto number;
|
|
handle_sign:
|
|
if (jflag)
|
|
num = va_arg(ap, intmax_t);
|
|
else if (qflag)
|
|
num = va_arg(ap, quad_t);
|
|
else if (tflag)
|
|
num = va_arg(ap, ptrdiff_t);
|
|
else if (lflag)
|
|
num = va_arg(ap, long);
|
|
else if (zflag)
|
|
num = va_arg(ap, ssize_t);
|
|
else if (hflag)
|
|
num = (short)va_arg(ap, int);
|
|
else if (cflag)
|
|
num = (char)va_arg(ap, int);
|
|
else
|
|
num = va_arg(ap, int);
|
|
number:
|
|
if (sign && (intmax_t)num < 0) {
|
|
neg = 1;
|
|
num = -(intmax_t)num;
|
|
}
|
|
p = ksprintn(nbuf, num, base, &n, upper);
|
|
tmp = 0;
|
|
if (sharpflag && num != 0) {
|
|
if (base == 8)
|
|
tmp++;
|
|
else if (base == 16)
|
|
tmp += 2;
|
|
}
|
|
if (neg)
|
|
tmp++;
|
|
|
|
if (!ladjust && padc == '0')
|
|
dwidth = width - tmp;
|
|
width -= tmp + imax(dwidth, n);
|
|
dwidth -= n;
|
|
if (!ladjust)
|
|
while (width-- > 0)
|
|
PCHAR(' ');
|
|
if (neg)
|
|
PCHAR('-');
|
|
if (sharpflag && num != 0) {
|
|
if (base == 8) {
|
|
PCHAR('0');
|
|
} else if (base == 16) {
|
|
PCHAR('0');
|
|
PCHAR('x');
|
|
}
|
|
}
|
|
while (dwidth-- > 0)
|
|
PCHAR('0');
|
|
|
|
while (*p)
|
|
PCHAR(*p--);
|
|
|
|
if (bconv && num != 0) {
|
|
/* %b conversion flag format. */
|
|
tmp = retval;
|
|
while (*q) {
|
|
n = *q++;
|
|
if (num & (1 << (n - 1))) {
|
|
PCHAR(retval != tmp ?
|
|
',' : '<');
|
|
for (; (n = *q) > ' '; ++q)
|
|
PCHAR(n);
|
|
} else
|
|
for (; *q > ' '; ++q)
|
|
continue;
|
|
}
|
|
if (retval != tmp) {
|
|
PCHAR('>');
|
|
width -= retval - tmp;
|
|
}
|
|
}
|
|
|
|
if (ladjust)
|
|
while (width-- > 0)
|
|
PCHAR(' ');
|
|
|
|
break;
|
|
default:
|
|
while (percent < fmt)
|
|
PCHAR(*percent++);
|
|
/*
|
|
* Since we ignore a formatting argument it is no
|
|
* longer safe to obey the remaining formatting
|
|
* arguments as the arguments will no longer match
|
|
* the format specs.
|
|
*/
|
|
stop = 1;
|
|
break;
|
|
}
|
|
}
|
|
#undef PCHAR
|
|
}
|
|
|
|
/*
|
|
* Put character in log buffer with a particular priority.
|
|
*/
|
|
static void
|
|
msglogchar(int c, int pri)
|
|
{
|
|
static int lastpri = -1;
|
|
static int dangling;
|
|
char nbuf[MAXNBUF];
|
|
char *p;
|
|
|
|
if (!msgbufmapped)
|
|
return;
|
|
if (c == '\0' || c == '\r')
|
|
return;
|
|
if (pri != -1 && pri != lastpri) {
|
|
if (dangling) {
|
|
msgbuf_addchar(msgbufp, '\n');
|
|
dangling = 0;
|
|
}
|
|
msgbuf_addchar(msgbufp, '<');
|
|
for (p = ksprintn(nbuf, (uintmax_t)pri, 10, NULL, 0); *p;)
|
|
msgbuf_addchar(msgbufp, *p--);
|
|
msgbuf_addchar(msgbufp, '>');
|
|
lastpri = pri;
|
|
}
|
|
msgbuf_addchar(msgbufp, c);
|
|
if (c == '\n') {
|
|
dangling = 0;
|
|
lastpri = -1;
|
|
} else {
|
|
dangling = 1;
|
|
}
|
|
}
|
|
|
|
static void
|
|
msglogstr(char *str, int pri, int filter_cr)
|
|
{
|
|
if (!msgbufmapped)
|
|
return;
|
|
|
|
msgbuf_addstr(msgbufp, pri, str, filter_cr);
|
|
}
|
|
|
|
void
|
|
msgbufinit(void *ptr, int size)
|
|
{
|
|
char *cp;
|
|
static struct msgbuf *oldp = NULL;
|
|
bool print_boot_tag;
|
|
|
|
size -= sizeof(*msgbufp);
|
|
cp = (char *)ptr;
|
|
print_boot_tag = !msgbufmapped;
|
|
/* Attempt to fetch kern.boot_tag tunable on first mapping */
|
|
if (!msgbufmapped)
|
|
TUNABLE_STR_FETCH("kern.boot_tag", current_boot_tag,
|
|
sizeof(current_boot_tag));
|
|
msgbufp = (struct msgbuf *)(cp + size);
|
|
msgbuf_reinit(msgbufp, cp, size);
|
|
if (msgbufmapped && oldp != msgbufp)
|
|
msgbuf_copy(oldp, msgbufp);
|
|
msgbufmapped = true;
|
|
if (print_boot_tag && *current_boot_tag != '\0')
|
|
printf("%s\n", current_boot_tag);
|
|
oldp = msgbufp;
|
|
}
|
|
|
|
/* Sysctls for accessing/clearing the msgbuf */
|
|
static int
|
|
sysctl_kern_msgbuf(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
char buf[128], *bp;
|
|
u_int seq;
|
|
int error, len;
|
|
bool wrap;
|
|
|
|
error = priv_check(req->td, PRIV_MSGBUF);
|
|
if (error)
|
|
return (error);
|
|
|
|
/* Read the whole buffer, one chunk at a time. */
|
|
mtx_lock(&msgbuf_lock);
|
|
msgbuf_peekbytes(msgbufp, NULL, 0, &seq);
|
|
wrap = (seq != 0);
|
|
for (;;) {
|
|
len = msgbuf_peekbytes(msgbufp, buf, sizeof(buf), &seq);
|
|
mtx_unlock(&msgbuf_lock);
|
|
if (len == 0)
|
|
return (SYSCTL_OUT(req, "", 1)); /* add nulterm */
|
|
if (wrap) {
|
|
/* Skip the first line, as it is probably incomplete. */
|
|
bp = memchr(buf, '\n', len);
|
|
if (bp == NULL) {
|
|
mtx_lock(&msgbuf_lock);
|
|
continue;
|
|
}
|
|
wrap = false;
|
|
bp++;
|
|
len -= bp - buf;
|
|
if (len == 0) {
|
|
mtx_lock(&msgbuf_lock);
|
|
continue;
|
|
}
|
|
} else
|
|
bp = buf;
|
|
error = sysctl_handle_opaque(oidp, bp, len, req);
|
|
if (error)
|
|
return (error);
|
|
|
|
mtx_lock(&msgbuf_lock);
|
|
}
|
|
}
|
|
|
|
SYSCTL_PROC(_kern, OID_AUTO, msgbuf,
|
|
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE,
|
|
NULL, 0, sysctl_kern_msgbuf, "A", "Contents of kernel message buffer");
|
|
|
|
static int msgbuf_clearflag;
|
|
|
|
static int
|
|
sysctl_kern_msgbuf_clear(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int error;
|
|
error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
|
|
if (!error && req->newptr) {
|
|
mtx_lock(&msgbuf_lock);
|
|
msgbuf_clear(msgbufp);
|
|
mtx_unlock(&msgbuf_lock);
|
|
msgbuf_clearflag = 0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_PROC(_kern, OID_AUTO, msgbuf_clear,
|
|
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_SECURE | CTLFLAG_MPSAFE,
|
|
&msgbuf_clearflag, 0, sysctl_kern_msgbuf_clear, "I",
|
|
"Clear kernel message buffer");
|
|
|
|
#ifdef DDB
|
|
|
|
DB_SHOW_COMMAND_FLAGS(msgbuf, db_show_msgbuf, DB_CMD_MEMSAFE)
|
|
{
|
|
int i, j;
|
|
|
|
if (!msgbufmapped) {
|
|
db_printf("msgbuf not mapped yet\n");
|
|
return;
|
|
}
|
|
db_printf("msgbufp = %p\n", msgbufp);
|
|
db_printf("magic = %x, size = %d, r= %u, w = %u, ptr = %p, cksum= %u\n",
|
|
msgbufp->msg_magic, msgbufp->msg_size, msgbufp->msg_rseq,
|
|
msgbufp->msg_wseq, msgbufp->msg_ptr, msgbufp->msg_cksum);
|
|
for (i = 0; i < msgbufp->msg_size && !db_pager_quit; i++) {
|
|
j = MSGBUF_SEQ_TO_POS(msgbufp, i + msgbufp->msg_rseq);
|
|
db_printf("%c", msgbufp->msg_ptr[j]);
|
|
}
|
|
db_printf("\n");
|
|
}
|
|
|
|
#endif /* DDB */
|
|
|
|
void
|
|
hexdump(const void *ptr, int length, const char *hdr, int flags)
|
|
{
|
|
int i, j, k;
|
|
int cols;
|
|
const unsigned char *cp;
|
|
char delim;
|
|
|
|
if ((flags & HD_DELIM_MASK) != 0)
|
|
delim = (flags & HD_DELIM_MASK) >> 8;
|
|
else
|
|
delim = ' ';
|
|
|
|
if ((flags & HD_COLUMN_MASK) != 0)
|
|
cols = flags & HD_COLUMN_MASK;
|
|
else
|
|
cols = 16;
|
|
|
|
cp = ptr;
|
|
for (i = 0; i < length; i+= cols) {
|
|
if (hdr != NULL)
|
|
printf("%s", hdr);
|
|
|
|
if ((flags & HD_OMIT_COUNT) == 0)
|
|
printf("%04x ", i);
|
|
|
|
if ((flags & HD_OMIT_HEX) == 0) {
|
|
for (j = 0; j < cols; j++) {
|
|
k = i + j;
|
|
if (k < length)
|
|
printf("%c%02x", delim, cp[k]);
|
|
else
|
|
printf(" ");
|
|
}
|
|
}
|
|
|
|
if ((flags & HD_OMIT_CHARS) == 0) {
|
|
printf(" |");
|
|
for (j = 0; j < cols; j++) {
|
|
k = i + j;
|
|
if (k >= length)
|
|
printf(" ");
|
|
else if (cp[k] >= ' ' && cp[k] <= '~')
|
|
printf("%c", cp[k]);
|
|
else
|
|
printf(".");
|
|
}
|
|
printf("|");
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
#endif /* _KERNEL */
|
|
|
|
void
|
|
sbuf_hexdump(struct sbuf *sb, const void *ptr, int length, const char *hdr,
|
|
int flags)
|
|
{
|
|
int i, j, k;
|
|
int cols;
|
|
const unsigned char *cp;
|
|
char delim;
|
|
|
|
if ((flags & HD_DELIM_MASK) != 0)
|
|
delim = (flags & HD_DELIM_MASK) >> 8;
|
|
else
|
|
delim = ' ';
|
|
|
|
if ((flags & HD_COLUMN_MASK) != 0)
|
|
cols = flags & HD_COLUMN_MASK;
|
|
else
|
|
cols = 16;
|
|
|
|
cp = ptr;
|
|
for (i = 0; i < length; i+= cols) {
|
|
if (hdr != NULL)
|
|
sbuf_printf(sb, "%s", hdr);
|
|
|
|
if ((flags & HD_OMIT_COUNT) == 0)
|
|
sbuf_printf(sb, "%04x ", i);
|
|
|
|
if ((flags & HD_OMIT_HEX) == 0) {
|
|
for (j = 0; j < cols; j++) {
|
|
k = i + j;
|
|
if (k < length)
|
|
sbuf_printf(sb, "%c%02x", delim, cp[k]);
|
|
else
|
|
sbuf_printf(sb, " ");
|
|
}
|
|
}
|
|
|
|
if ((flags & HD_OMIT_CHARS) == 0) {
|
|
sbuf_printf(sb, " |");
|
|
for (j = 0; j < cols; j++) {
|
|
k = i + j;
|
|
if (k >= length)
|
|
sbuf_printf(sb, " ");
|
|
else if (cp[k] >= ' ' && cp[k] <= '~')
|
|
sbuf_printf(sb, "%c", cp[k]);
|
|
else
|
|
sbuf_printf(sb, ".");
|
|
}
|
|
sbuf_printf(sb, "|");
|
|
}
|
|
sbuf_printf(sb, "\n");
|
|
}
|
|
}
|
|
|
|
#ifdef _KERNEL
|
|
void
|
|
counted_warning(unsigned *counter, const char *msg)
|
|
{
|
|
struct thread *td;
|
|
unsigned c;
|
|
|
|
for (;;) {
|
|
c = *counter;
|
|
if (c == 0)
|
|
break;
|
|
if (atomic_cmpset_int(counter, c, c - 1)) {
|
|
td = curthread;
|
|
log(LOG_INFO, "pid %d (%s) %s%s\n",
|
|
td->td_proc->p_pid, td->td_name, msg,
|
|
c > 1 ? "" : " - not logging anymore");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef _KERNEL
|
|
void
|
|
sbuf_putbuf(struct sbuf *sb)
|
|
{
|
|
|
|
prf_putbuf(sbuf_data(sb), TOLOG | TOCONS, -1);
|
|
}
|
|
#else
|
|
void
|
|
sbuf_putbuf(struct sbuf *sb)
|
|
{
|
|
|
|
printf("%s", sbuf_data(sb));
|
|
}
|
|
#endif
|
|
|
|
int
|
|
sbuf_printf_drain(void *arg, const char *data, int len)
|
|
{
|
|
size_t *retvalptr;
|
|
int r;
|
|
#ifdef _KERNEL
|
|
char *dataptr;
|
|
char oldchr;
|
|
|
|
/*
|
|
* This is allowed as an extra byte is always resvered for
|
|
* terminating NUL byte. Save and restore the byte because
|
|
* we might be flushing a record, and there may be valid
|
|
* data after the buffer.
|
|
*/
|
|
oldchr = data[len];
|
|
dataptr = __DECONST(char *, data);
|
|
dataptr[len] = '\0';
|
|
|
|
prf_putbuf(dataptr, TOLOG | TOCONS, -1);
|
|
r = len;
|
|
|
|
dataptr[len] = oldchr;
|
|
|
|
#else /* !_KERNEL */
|
|
|
|
r = printf("%.*s", len, data);
|
|
if (r < 0)
|
|
return (-errno);
|
|
|
|
#endif
|
|
|
|
retvalptr = arg;
|
|
if (retvalptr != NULL)
|
|
*retvalptr += r;
|
|
|
|
return (r);
|
|
}
|