f591779bb5
New locks are: - pgrpsess_lock which locks the whole pgrps and sessions, - pg_mtx which protects the pgrp members, and - s_mtx which protects the session members. Please refer to sys/proc.h for the coverage of these locks. Changes on the pgrp/session interface: - pgfind() needs the pgrpsess_lock held. - The caller of enterpgrp() is responsible to allocate a new pgrp and session. - Call enterthispgrp() in order to enter an existing pgrp. - pgsignal() requires a pgrp lock held. Reviewed by: jhb, alfred Tested on: cvsup.jp.FreeBSD.org (which is a quad-CPU machine running -current)
933 lines
20 KiB
C
933 lines
20 KiB
C
/*-
|
|
* 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
|
|
* to the University of California by American Telephone and Telegraph
|
|
* 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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*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* 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
|
|
* 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.
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|
* 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.
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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
|
|
* 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
|
|
* 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)
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|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* 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
|
|
* SUCH DAMAGE.
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|
*
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* @(#)subr_prf.c 8.3 (Berkeley) 1/21/94
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* $FreeBSD$
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|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
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#include <sys/lock.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/proc.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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|
|
|
/*
|
|
* Note that stdarg.h and the ANSI style va_start macro is used for both
|
|
* ANSI and traditional C compilers.
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|
*/
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|
#include <machine/stdarg.h>
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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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|
|
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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(quad_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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|
};
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|
|
|
struct snprintf_arg {
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|
char *str;
|
|
size_t remain;
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|
};
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|
|
|
extern int log_open;
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|
|
|
struct tty *constty; /* pointer to console "window" tty */
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|
|
|
static void (*v_putc)(int) = cnputc; /* routine to putc on virtual console */
|
|
static void msglogchar(int c, int pri);
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|
static void msgaddchar(int c, void *dummy);
|
|
static void putchar __P((int ch, void *arg));
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|
static char *ksprintn __P((char *nbuf, u_long num, int base, int *len));
|
|
static char *ksprintqn __P((char *nbuf, u_quad_t num, int base, int *len));
|
|
static void snprintf_func __P((int ch, void *arg));
|
|
|
|
static int consintr = 1; /* Ok to handle console interrupts? */
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|
static int msgbufmapped; /* Set when safe to use msgbuf */
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|
int msgbuftrigger;
|
|
|
|
/*
|
|
* Warn that a system table is full.
|
|
*/
|
|
void
|
|
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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|
}
|
|
|
|
/*
|
|
* 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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|
int
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|
uprintf(const char *fmt, ...)
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|
{
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|
struct thread *td = curthread;
|
|
struct proc *p = td->td_proc;
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|
va_list ap;
|
|
struct putchar_arg pca;
|
|
int retval;
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|
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|
if (td == NULL || td == PCPU_GET(idlethread))
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return (0);
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|
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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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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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return (0);
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pca.flags = TOTTY;
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va_start(ap, fmt);
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retval = kvprintf(fmt, putchar, &pca, 10, ap);
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va_end(ap);
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|
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|
return (retval);
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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, 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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struct tty *tp = NULL;
|
|
int flags = 0, shld = 0;
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|
va_list ap;
|
|
struct putchar_arg pca;
|
|
int retval;
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if (pri != -1)
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flags |= TOLOG;
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if (p != NULL) {
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PGRPSESS_XLOCK();
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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_LOCK(p->p_session);
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SESSHOLD(p->p_session);
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tp = 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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shld++;
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if (ttycheckoutq(tp, 0))
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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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PGRPSESS_XUNLOCK();
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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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va_start(ap, fmt);
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retval = kvprintf(fmt, putchar, &pca, 10, ap);
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va_end(ap);
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if (shld) {
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PGRPSESS_XLOCK();
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SESS_LOCK(p->p_session);
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|
SESSRELE(p->p_session);
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SESS_UNLOCK(p->p_session);
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PGRPSESS_XUNLOCK();
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}
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msgbuftrigger = 1;
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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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int
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|
ttyprintf(struct tty *tp, const char *fmt, ...)
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|
{
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|
va_list ap;
|
|
struct putchar_arg pca;
|
|
int retval;
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|
|
|
va_start(ap, fmt);
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pca.tty = tp;
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pca.flags = TOTTY;
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retval = kvprintf(fmt, putchar, &pca, 10, ap);
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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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|
* 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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|
{
|
|
va_list ap;
|
|
int retval;
|
|
struct putchar_arg pca;
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|
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|
pca.tty = NULL;
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|
pca.pri = level;
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|
pca.flags = log_open ? TOLOG : TOCONS;
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|
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|
va_start(ap, fmt);
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retval = kvprintf(fmt, putchar, &pca, 10, ap);
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va_end(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, i, error, iovlen, nl;
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|
struct uio muio;
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|
struct iovec *miov = NULL;
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|
char *consbuffer;
|
|
int pri;
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|
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|
pri = LOG_INFO | LOG_CONSOLE;
|
|
muio = *uio;
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|
iovlen = uio->uio_iovcnt * sizeof (struct iovec);
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MALLOC(miov, struct iovec *, iovlen, M_TEMP, M_WAITOK);
|
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MALLOC(consbuffer, char *, CONSCHUNK, M_TEMP, M_WAITOK);
|
|
bcopy((caddr_t)muio.uio_iov, (caddr_t)miov, iovlen);
|
|
muio.uio_iov = miov;
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|
uio = &muio;
|
|
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|
nl = 0;
|
|
while (uio->uio_resid > 0) {
|
|
c = imin(uio->uio_resid, CONSCHUNK);
|
|
error = uiomove(consbuffer, c, uio);
|
|
if (error != 0)
|
|
return;
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|
for (i = 0; i < c; i++) {
|
|
msglogchar(consbuffer[i], pri);
|
|
if (consbuffer[i] == '\n')
|
|
nl = 1;
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else
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nl = 0;
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|
}
|
|
}
|
|
if (!nl)
|
|
msglogchar('\n', pri);
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|
msgbuftrigger = 1;
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|
FREE(miov, M_TEMP);
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|
FREE(consbuffer, M_TEMP);
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|
return;
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|
}
|
|
|
|
int
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|
printf(const char *fmt, ...)
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|
{
|
|
va_list ap;
|
|
int savintr;
|
|
struct putchar_arg pca;
|
|
int retval;
|
|
|
|
savintr = consintr; /* disable interrupts */
|
|
consintr = 0;
|
|
va_start(ap, fmt);
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|
pca.tty = NULL;
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|
pca.flags = TOCONS | TOLOG;
|
|
pca.pri = -1;
|
|
retval = kvprintf(fmt, putchar, &pca, 10, ap);
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|
va_end(ap);
|
|
if (!panicstr)
|
|
msgbuftrigger = 1;
|
|
consintr = savintr; /* reenable interrupts */
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|
return (retval);
|
|
}
|
|
|
|
int
|
|
vprintf(const char *fmt, va_list ap)
|
|
{
|
|
int savintr;
|
|
struct putchar_arg pca;
|
|
int retval;
|
|
|
|
savintr = consintr; /* disable interrupts */
|
|
consintr = 0;
|
|
pca.tty = NULL;
|
|
pca.flags = TOCONS | TOLOG;
|
|
pca.pri = -1;
|
|
retval = kvprintf(fmt, putchar, &pca, 10, ap);
|
|
if (!panicstr)
|
|
msgbuftrigger = 1;
|
|
consintr = savintr; /* reenable interrupts */
|
|
return (retval);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
int flags = ap->flags;
|
|
struct tty *tp = ap->tty;
|
|
if (panicstr)
|
|
constty = NULL;
|
|
if ((flags & TOCONS) && tp == NULL && constty) {
|
|
tp = constty;
|
|
flags |= TOTTY;
|
|
}
|
|
if ((flags & TOTTY) && tp && tputchar(c, tp) < 0 &&
|
|
(flags & TOCONS) && tp == constty)
|
|
constty = NULL;
|
|
if ((flags & TOLOG))
|
|
msglogchar(c, ap->pri);
|
|
if ((flags & TOCONS) && constty == NULL && c != '\0')
|
|
(*v_putc)(c);
|
|
}
|
|
|
|
/*
|
|
* Scaled down version of sprintf(3).
|
|
*/
|
|
int
|
|
sprintf(char *buf, const char *cfmt, ...)
|
|
{
|
|
int retval;
|
|
va_list ap;
|
|
|
|
va_start(ap, cfmt);
|
|
retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
|
|
buf[retval] = '\0';
|
|
va_end(ap);
|
|
return (retval);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
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(nbuf, ul, base, lenp)
|
|
char *nbuf;
|
|
u_long ul;
|
|
int base, *lenp;
|
|
{
|
|
char *p;
|
|
|
|
p = nbuf;
|
|
*p = '\0';
|
|
do {
|
|
*++p = hex2ascii(ul % base);
|
|
} while (ul /= base);
|
|
if (lenp)
|
|
*lenp = p - nbuf;
|
|
return (p);
|
|
}
|
|
/* ksprintn, but for a quad_t. */
|
|
static char *
|
|
ksprintqn(nbuf, uq, base, lenp)
|
|
char *nbuf;
|
|
u_quad_t uq;
|
|
int base, *lenp;
|
|
{
|
|
char *p;
|
|
|
|
p = nbuf;
|
|
*p = '\0';
|
|
do {
|
|
*++p = hex2ascii(uq % base);
|
|
} while (uq /= 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\n");
|
|
*
|
|
* would produce output:
|
|
*
|
|
* reg=3<BITTWO,BITONE>
|
|
*
|
|
* XXX: %D -- Hexdump, takes pointer and separator string:
|
|
* ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX
|
|
* ("%*D", len, ptr, " " -> XX XX XX XX ...
|
|
*/
|
|
int
|
|
kvprintf(char const *fmt, void (*func)(int, void*), void *arg, int radix, va_list ap)
|
|
{
|
|
#define PCHAR(c) {int cc=(c); if (func) (*func)(cc,arg); else *d++ = cc; retval++; }
|
|
char nbuf[MAXNBUF];
|
|
char *p, *q, *d;
|
|
u_char *up;
|
|
int ch, n;
|
|
u_long ul;
|
|
u_quad_t uq;
|
|
int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
|
|
int dwidth;
|
|
char padc;
|
|
int retval = 0;
|
|
|
|
ul = 0;
|
|
uq = 0;
|
|
if (!func)
|
|
d = (char *) arg;
|
|
else
|
|
d = NULL;
|
|
|
|
if (fmt == NULL)
|
|
fmt = "(fmt null)\n";
|
|
|
|
if (radix < 2 || radix > 36)
|
|
radix = 10;
|
|
|
|
for (;;) {
|
|
padc = ' ';
|
|
width = 0;
|
|
while ((ch = (u_char)*fmt++) != '%') {
|
|
if (ch == '\0')
|
|
return (retval);
|
|
PCHAR(ch);
|
|
}
|
|
qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
|
|
sign = 0; dot = 0; dwidth = 0;
|
|
reswitch: switch (ch = (u_char)*fmt++) {
|
|
case '.':
|
|
dot = 1;
|
|
goto reswitch;
|
|
case '#':
|
|
sharpflag = 1;
|
|
goto reswitch;
|
|
case '+':
|
|
sign = 1;
|
|
goto reswitch;
|
|
case '-':
|
|
ladjust = 1;
|
|
goto reswitch;
|
|
case '%':
|
|
PCHAR(ch);
|
|
break;
|
|
case '*':
|
|
if (!dot) {
|
|
width = va_arg(ap, int);
|
|
if (width < 0) {
|
|
ladjust = !ladjust;
|
|
width = -width;
|
|
}
|
|
} else {
|
|
dwidth = va_arg(ap, int);
|
|
}
|
|
goto reswitch;
|
|
case '0':
|
|
if (!dot) {
|
|
padc = '0';
|
|
goto reswitch;
|
|
}
|
|
case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
for (n = 0;; ++fmt) {
|
|
n = n * 10 + ch - '0';
|
|
ch = *fmt;
|
|
if (ch < '0' || ch > '9')
|
|
break;
|
|
}
|
|
if (dot)
|
|
dwidth = n;
|
|
else
|
|
width = n;
|
|
goto reswitch;
|
|
case 'b':
|
|
ul = va_arg(ap, int);
|
|
p = va_arg(ap, char *);
|
|
for (q = ksprintn(nbuf, ul, *p++, NULL); *q;)
|
|
PCHAR(*q--);
|
|
|
|
if (!ul)
|
|
break;
|
|
|
|
for (tmp = 0; *p;) {
|
|
n = *p++;
|
|
if (ul & (1 << (n - 1))) {
|
|
PCHAR(tmp ? ',' : '<');
|
|
for (; (n = *p) > ' '; ++p)
|
|
PCHAR(n);
|
|
tmp = 1;
|
|
} else
|
|
for (; *p > ' '; ++p)
|
|
continue;
|
|
}
|
|
if (tmp)
|
|
PCHAR('>');
|
|
break;
|
|
case 'c':
|
|
PCHAR(va_arg(ap, int));
|
|
break;
|
|
case 'D':
|
|
up = va_arg(ap, u_char *);
|
|
p = va_arg(ap, char *);
|
|
if (!width)
|
|
width = 16;
|
|
while(width--) {
|
|
PCHAR(hex2ascii(*up >> 4));
|
|
PCHAR(hex2ascii(*up & 0x0f));
|
|
up++;
|
|
if (width)
|
|
for (q=p;*q;q++)
|
|
PCHAR(*q);
|
|
}
|
|
break;
|
|
case 'd':
|
|
if (qflag)
|
|
uq = va_arg(ap, quad_t);
|
|
else if (lflag)
|
|
ul = va_arg(ap, long);
|
|
else
|
|
ul = va_arg(ap, int);
|
|
sign = 1;
|
|
base = 10;
|
|
goto number;
|
|
case 'l':
|
|
if (lflag) {
|
|
lflag = 0;
|
|
qflag = 1;
|
|
} else
|
|
lflag = 1;
|
|
goto reswitch;
|
|
case 'o':
|
|
if (qflag)
|
|
uq = va_arg(ap, u_quad_t);
|
|
else if (lflag)
|
|
ul = va_arg(ap, u_long);
|
|
else
|
|
ul = va_arg(ap, u_int);
|
|
base = 8;
|
|
goto nosign;
|
|
case 'p':
|
|
ul = (uintptr_t)va_arg(ap, void *);
|
|
base = 16;
|
|
sharpflag = (width == 0);
|
|
goto nosign;
|
|
case 'q':
|
|
qflag = 1;
|
|
goto reswitch;
|
|
case 'n':
|
|
case 'r':
|
|
if (qflag)
|
|
uq = va_arg(ap, u_quad_t);
|
|
else if (lflag)
|
|
ul = va_arg(ap, u_long);
|
|
else
|
|
ul = sign ?
|
|
(u_long)va_arg(ap, int) : va_arg(ap, u_int);
|
|
base = radix;
|
|
goto number;
|
|
case 's':
|
|
p = va_arg(ap, char *);
|
|
if (p == NULL)
|
|
p = "(null)";
|
|
if (!dot)
|
|
n = strlen (p);
|
|
else
|
|
for (n = 0; n < dwidth && p[n]; n++)
|
|
continue;
|
|
|
|
width -= n;
|
|
|
|
if (!ladjust && width > 0)
|
|
while (width--)
|
|
PCHAR(padc);
|
|
while (n--)
|
|
PCHAR(*p++);
|
|
if (ladjust && width > 0)
|
|
while (width--)
|
|
PCHAR(padc);
|
|
break;
|
|
case 'u':
|
|
if (qflag)
|
|
uq = va_arg(ap, u_quad_t);
|
|
else if (lflag)
|
|
ul = va_arg(ap, u_long);
|
|
else
|
|
ul = va_arg(ap, u_int);
|
|
base = 10;
|
|
goto nosign;
|
|
case 'x':
|
|
case 'X':
|
|
if (qflag)
|
|
uq = va_arg(ap, u_quad_t);
|
|
else if (lflag)
|
|
ul = va_arg(ap, u_long);
|
|
else
|
|
ul = va_arg(ap, u_int);
|
|
base = 16;
|
|
goto nosign;
|
|
case 'z':
|
|
if (qflag)
|
|
uq = va_arg(ap, u_quad_t);
|
|
else if (lflag)
|
|
ul = va_arg(ap, u_long);
|
|
else
|
|
ul = sign ?
|
|
(u_long)va_arg(ap, int) : va_arg(ap, u_int);
|
|
base = 16;
|
|
goto number;
|
|
nosign: sign = 0;
|
|
number:
|
|
if (qflag) {
|
|
if (sign && (quad_t)uq < 0) {
|
|
neg = 1;
|
|
uq = -(quad_t)uq;
|
|
}
|
|
p = ksprintqn(nbuf, uq, base, &tmp);
|
|
} else {
|
|
if (sign && (long)ul < 0) {
|
|
neg = 1;
|
|
ul = -(long)ul;
|
|
}
|
|
p = ksprintn(nbuf, ul, base, &tmp);
|
|
}
|
|
if (sharpflag && (qflag ? uq != 0 : ul != 0)) {
|
|
if (base == 8)
|
|
tmp++;
|
|
else if (base == 16)
|
|
tmp += 2;
|
|
}
|
|
if (neg)
|
|
tmp++;
|
|
|
|
if (!ladjust && width && (width -= tmp) > 0)
|
|
while (width--)
|
|
PCHAR(padc);
|
|
if (neg)
|
|
PCHAR('-');
|
|
if (sharpflag && (qflag ? uq != 0 : ul != 0)) {
|
|
if (base == 8) {
|
|
PCHAR('0');
|
|
} else if (base == 16) {
|
|
PCHAR('0');
|
|
PCHAR('x');
|
|
}
|
|
}
|
|
|
|
while (*p)
|
|
PCHAR(*p--);
|
|
|
|
if (ladjust && width && (width -= tmp) > 0)
|
|
while (width--)
|
|
PCHAR(padc);
|
|
|
|
break;
|
|
default:
|
|
PCHAR('%');
|
|
if (lflag)
|
|
PCHAR('l');
|
|
PCHAR(ch);
|
|
break;
|
|
}
|
|
}
|
|
#undef PCHAR
|
|
}
|
|
|
|
/*
|
|
* Put character in log buffer 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) {
|
|
msgaddchar('\n', NULL);
|
|
dangling = 0;
|
|
}
|
|
msgaddchar('<', NULL);
|
|
for (p = ksprintn(nbuf, (u_long)pri, 10, NULL); *p;)
|
|
msgaddchar(*p--, NULL);
|
|
msgaddchar('>', NULL);
|
|
lastpri = pri;
|
|
}
|
|
msgaddchar(c, NULL);
|
|
if (c == '\n') {
|
|
dangling = 0;
|
|
lastpri = -1;
|
|
} else {
|
|
dangling = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Put char in log buffer
|
|
*/
|
|
static void
|
|
msgaddchar(int c, void *dummy)
|
|
{
|
|
struct msgbuf *mbp;
|
|
|
|
if (!msgbufmapped)
|
|
return;
|
|
mbp = msgbufp;
|
|
mbp->msg_ptr[mbp->msg_bufx++] = c;
|
|
if (mbp->msg_bufx >= mbp->msg_size)
|
|
mbp->msg_bufx = 0;
|
|
/* If the buffer is full, keep the most recent data. */
|
|
if (mbp->msg_bufr == mbp->msg_bufx) {
|
|
if (++mbp->msg_bufr >= mbp->msg_size)
|
|
mbp->msg_bufr = 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
msgbufcopy(struct msgbuf *oldp)
|
|
{
|
|
int pos;
|
|
|
|
pos = oldp->msg_bufr;
|
|
while (pos != oldp->msg_bufx) {
|
|
msglogchar(oldp->msg_ptr[pos], -1);
|
|
if (++pos >= oldp->msg_size)
|
|
pos = 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
msgbufinit(void *ptr, size_t size)
|
|
{
|
|
char *cp;
|
|
static struct msgbuf *oldp = NULL;
|
|
|
|
size -= sizeof(*msgbufp);
|
|
cp = (char *)ptr;
|
|
msgbufp = (struct msgbuf *) (cp + size);
|
|
if (msgbufp->msg_magic != MSG_MAGIC || msgbufp->msg_size != size ||
|
|
msgbufp->msg_bufx >= size || msgbufp->msg_bufr >= size) {
|
|
bzero(cp, size);
|
|
bzero(msgbufp, sizeof(*msgbufp));
|
|
msgbufp->msg_magic = MSG_MAGIC;
|
|
msgbufp->msg_size = (char *)msgbufp - cp;
|
|
}
|
|
msgbufp->msg_ptr = cp;
|
|
if (msgbufmapped && oldp != msgbufp)
|
|
msgbufcopy(oldp);
|
|
msgbufmapped = 1;
|
|
oldp = msgbufp;
|
|
}
|
|
|
|
SYSCTL_DECL(_security_bsd);
|
|
|
|
static int unprivileged_read_msgbuf = 1;
|
|
SYSCTL_INT(_security_bsd, OID_AUTO, unprivileged_read_msgbuf,
|
|
CTLFLAG_RW, &unprivileged_read_msgbuf, 0,
|
|
"Unprivileged processes may read the kernel message buffer");
|
|
|
|
/* Sysctls for accessing/clearing the msgbuf */
|
|
static int
|
|
sysctl_kern_msgbuf(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int error;
|
|
|
|
if (!unprivileged_read_msgbuf) {
|
|
error = suser_td(req->td);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Unwind the buffer, so that it's linear (possibly starting with
|
|
* some initial nulls).
|
|
*/
|
|
error = sysctl_handle_opaque(oidp, msgbufp->msg_ptr + msgbufp->msg_bufx,
|
|
msgbufp->msg_size - msgbufp->msg_bufx, req);
|
|
if (error)
|
|
return (error);
|
|
if (msgbufp->msg_bufx > 0) {
|
|
error = sysctl_handle_opaque(oidp, msgbufp->msg_ptr,
|
|
msgbufp->msg_bufx, req);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_PROC(_kern, OID_AUTO, msgbuf, CTLTYPE_STRING | CTLFLAG_RD,
|
|
0, 0, sysctl_kern_msgbuf, "A", "Contents of kernel message buffer");
|
|
|
|
static int msgbuf_clear;
|
|
|
|
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) {
|
|
/* Clear the buffer and reset write pointer */
|
|
bzero(msgbufp->msg_ptr, msgbufp->msg_size);
|
|
msgbufp->msg_bufr = msgbufp->msg_bufx = 0;
|
|
msgbuf_clear = 0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_PROC(_kern, OID_AUTO, msgbuf_clear,
|
|
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_SECURE, &msgbuf_clear, 0,
|
|
sysctl_kern_msgbuf_clear, "I", "Clear kernel message buffer");
|
|
|
|
#include "opt_ddb.h"
|
|
#ifdef DDB
|
|
#include <ddb/ddb.h>
|
|
|
|
DB_SHOW_COMMAND(msgbuf, db_show_msgbuf)
|
|
{
|
|
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= %d, w = %d, ptr = %p\n",
|
|
msgbufp->msg_magic, msgbufp->msg_size, msgbufp->msg_bufr,
|
|
msgbufp->msg_bufx, msgbufp->msg_ptr);
|
|
for (i = 0; i < msgbufp->msg_size; i++) {
|
|
j = (i + msgbufp->msg_bufr) % msgbufp->msg_size;
|
|
db_printf("%c", msgbufp->msg_ptr[j]);
|
|
}
|
|
db_printf("\n");
|
|
}
|
|
|
|
#endif /* DDB */
|