hexdump.c revision 116660
197049Speter/*- 2184989Srafan * Copyright (c) 1986, 1988, 1991, 1993 397049Speter * The Regents of the University of California. All rights reserved. 497049Speter * (c) UNIX System Laboratories, Inc. 597049Speter * All or some portions of this file are derived from material licensed 697049Speter * to the University of California by American Telephone and Telegraph 797049Speter * Co. or Unix System Laboratories, Inc. and are reproduced herein with 897049Speter * the permission of UNIX System Laboratories, Inc. 997049Speter * 1097049Speter * Redistribution and use in source and binary forms, with or without 1197049Speter * modification, are permitted provided that the following conditions 1297049Speter * are met: 1397049Speter * 1. Redistributions of source code must retain the above copyright 1497049Speter * notice, this list of conditions and the following disclaimer. 1597049Speter * 2. Redistributions in binary form must reproduce the above copyright 1697049Speter * notice, this list of conditions and the following disclaimer in the 1797049Speter * documentation and/or other materials provided with the distribution. 1897049Speter * 3. All advertising materials mentioning features or use of this software 1997049Speter * must display the following acknowledgement: 2097049Speter * This product includes software developed by the University of 2197049Speter * California, Berkeley and its contributors. 2297049Speter * 4. Neither the name of the University nor the names of its contributors 2397049Speter * may be used to endorse or promote products derived from this software 2497049Speter * without specific prior written permission. 2597049Speter * 2697049Speter * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2797049Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2897049Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2997049Speter * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30184989Srafan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3197049Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3297049Speter * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3397049Speter * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3497049Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3597049Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3697049Speter * SUCH DAMAGE. 3797049Speter * 3897049Speter * @(#)subr_prf.c 8.3 (Berkeley) 1/21/94 3997049Speter */ 4097049Speter 4197049Speter#include <sys/cdefs.h> 4297049Speter__FBSDID("$FreeBSD: head/sys/kern/subr_prf.c 116660 2003-06-22 02:18:31Z iedowse $"); 4397049Speter 4497049Speter#include "opt_ddb.h" 4597049Speter 4697049Speter#include <sys/param.h> 4797049Speter#include <sys/systm.h> 4897049Speter#include <sys/lock.h> 4997049Speter#include <sys/mutex.h> 5097049Speter#include <sys/sx.h> 5197049Speter#include <sys/kernel.h> 5297049Speter#include <sys/msgbuf.h> 5397049Speter#include <sys/malloc.h> 5497049Speter#include <sys/proc.h> 5597049Speter#include <sys/stddef.h> 5697049Speter#include <sys/sysctl.h> 5797049Speter#include <sys/tty.h> 5897049Speter#include <sys/syslog.h> 5997049Speter#include <sys/cons.h> 6097049Speter#include <sys/uio.h> 6197049Speter 6297049Speter#ifdef DDB 6397049Speter#include <ddb/ddb.h> 6497049Speter#endif 6597049Speter 6697049Speter/* 6797049Speter * Note that stdarg.h and the ANSI style va_start macro is used for both 6897049Speter * ANSI and traditional C compilers. 6997049Speter */ 7097049Speter#include <machine/stdarg.h> 7197049Speter 7297049Speter#define TOCONS 0x01 7397049Speter#define TOTTY 0x02 7497049Speter#define TOLOG 0x04 7597049Speter 7697049Speter/* Max number conversion buffer length: a u_quad_t in base 2, plus NUL byte. */ 7797049Speter#define MAXNBUF (sizeof(intmax_t) * NBBY + 1) 7897049Speter 79166124Srafanstruct putchar_arg { 80166124Srafan int flags; 81166124Srafan int pri; 82166124Srafan struct tty *tty; 83166124Srafan}; 84166124Srafan 8597049Speterstruct snprintf_arg { 8697049Speter char *str; 8797049Speter size_t remain; 8897049Speter}; 8997049Speter 9097049Speterextern int log_open; 9197049Speter 9297049Speterstruct tty *constty; /* pointer to console "window" tty */ 9397049Speter 9497049Speterstatic void (*v_putc)(int) = cnputc; /* routine to putc on virtual console */ 9597049Speterstatic void msglogchar(int c, int pri); 9697049Speterstatic void putchar(int ch, void *arg); 9797049Speterstatic char *ksprintn(char *nbuf, uintmax_t num, int base, int *len); 9897049Speterstatic void snprintf_func(int ch, void *arg); 9997049Speter 10097049Speterstatic int consintr = 1; /* Ok to handle console interrupts? */ 10197049Speterstatic int msgbufmapped; /* Set when safe to use msgbuf */ 10297049Speterint msgbuftrigger; 10397049Speter 10497049Speterstatic int log_console_output = 1; 10597049SpeterTUNABLE_INT("kern.log_console_output", &log_console_output); 10697049SpeterSYSCTL_INT(_kern, OID_AUTO, log_console_output, CTLFLAG_RW, 10797049Speter &log_console_output, 0, ""); 108166124Srafan 10997049Speter/* 11097049Speter * Warn that a system table is full. 11197049Speter */ 11297049Spetervoid 11397049Spetertablefull(const char *tab) 11497049Speter{ 115166124Srafan 11697049Speter log(LOG_ERR, "%s: table is full\n", tab); 11797049Speter} 11897049Speter 11997049Speter/* 12097049Speter * Uprintf prints to the controlling terminal for the current process. 12197049Speter * It may block if the tty queue is overfull. No message is printed if 12297049Speter * the queue does not clear in a reasonable time. 12397049Speter */ 12497049Speterint 12597049Speteruprintf(const char *fmt, ...) 12697049Speter{ 127166124Srafan struct thread *td = curthread; 12897049Speter struct proc *p = td->td_proc; 12997049Speter va_list ap; 13097049Speter struct putchar_arg pca; 13197049Speter int retval; 13297049Speter 13397049Speter if (td == NULL || td == PCPU_GET(idlethread)) 13497049Speter return (0); 13597049Speter 13697049Speter p = td->td_proc; 13797049Speter PROC_LOCK(p); 13897049Speter if ((p->p_flag & P_CONTROLT) == 0) { 13997049Speter PROC_UNLOCK(p); 14097049Speter return (0); 14197049Speter } 14297049Speter SESS_LOCK(p->p_session); 14397049Speter pca.tty = p->p_session->s_ttyp; 14497049Speter SESS_UNLOCK(p->p_session); 14597049Speter PROC_UNLOCK(p); 14697049Speter if (pca.tty == NULL) 14797049Speter return (0); 14897049Speter pca.flags = TOTTY; 14997049Speter va_start(ap, fmt); 15097049Speter retval = kvprintf(fmt, putchar, &pca, 10, ap); 15197049Speter va_end(ap); 15297049Speter 15397049Speter return (retval); 15497049Speter} 15597049Speter 15697049Speter/* 15797049Speter * tprintf prints on the controlling terminal associated 15897049Speter * with the given session, possibly to the log as well. 15997049Speter */ 16097049Spetervoid 16197049Spetertprintf(struct proc *p, int pri, const char *fmt, ...) 16297049Speter{ 16397049Speter struct tty *tp = NULL; 16497049Speter int flags = 0; 16597049Speter va_list ap; 16697049Speter struct putchar_arg pca; 167166124Srafan struct session *sess = NULL; 16897049Speter 16997049Speter if (pri != -1) 17097049Speter flags |= TOLOG; 17197049Speter if (p != NULL) { 17297049Speter PROC_LOCK(p); 17397049Speter if (p->p_flag & P_CONTROLT && p->p_session->s_ttyvp) { 17497049Speter sess = p->p_session; 17597049Speter SESS_LOCK(sess); 17697049Speter PROC_UNLOCK(p); 17797049Speter SESSHOLD(sess); 17897049Speter tp = sess->s_ttyp; 17997049Speter SESS_UNLOCK(sess); 18097049Speter if (ttycheckoutq(tp, 0)) 18197049Speter flags |= TOTTY; 18297049Speter else 18397049Speter tp = NULL; 18497049Speter } else 18597049Speter PROC_UNLOCK(p); 18697049Speter } 18797049Speter pca.pri = pri; 18897049Speter pca.tty = tp; 18997049Speter pca.flags = flags; 19097049Speter va_start(ap, fmt); 19197049Speter kvprintf(fmt, putchar, &pca, 10, ap); 19297049Speter va_end(ap); 19397049Speter if (sess != NULL) { 19497049Speter SESS_LOCK(sess); 19597049Speter SESSRELE(sess); 19697049Speter SESS_UNLOCK(sess); 19797049Speter } 19897049Speter msgbuftrigger = 1; 19997049Speter} 20097049Speter 20197049Speter/* 20297049Speter * Ttyprintf displays a message on a tty; it should be used only by 20397049Speter * the tty driver, or anything that knows the underlying tty will not 20497049Speter * be revoke(2)'d away. Other callers should use tprintf. 20597049Speter */ 20697049Speterint 20797049Speterttyprintf(struct tty *tp, const char *fmt, ...) 20897049Speter{ 20997049Speter va_list ap; 21097049Speter struct putchar_arg pca; 21197049Speter int retval; 21297049Speter 21397049Speter va_start(ap, fmt); 21497049Speter pca.tty = tp; 21597049Speter pca.flags = TOTTY; 21697049Speter retval = kvprintf(fmt, putchar, &pca, 10, ap); 21797049Speter va_end(ap); 21897049Speter return (retval); 21997049Speter} 22097049Speter 22197049Speter/* 22297049Speter * Log writes to the log buffer, and guarantees not to sleep (so can be 22397049Speter * called by interrupt routines). If there is no process reading the 22497049Speter * log yet, it writes to the console also. 22597049Speter */ 22697049Spetervoid 22797049Speterlog(int level, const char *fmt, ...) 22897049Speter{ 22997049Speter va_list ap; 23097049Speter struct putchar_arg pca; 23197049Speter 23297049Speter pca.tty = NULL; 23397049Speter pca.pri = level; 234166124Srafan pca.flags = log_open ? TOLOG : TOCONS; 235166124Srafan 236166124Srafan va_start(ap, fmt); 237166124Srafan kvprintf(fmt, putchar, &pca, 10, ap); 23897049Speter va_end(ap); 23997049Speter 24097049Speter msgbuftrigger = 1; 24197049Speter} 24297049Speter 24397049Speter#define CONSCHUNK 128 24497049Speter 24597049Spetervoid 24697049Speterlog_console(struct uio *uio) 24797049Speter{ 24897049Speter int c, i, error, iovlen, nl; 24997049Speter struct uio muio; 25097049Speter struct iovec *miov = NULL; 25197049Speter char *consbuffer; 25297049Speter int pri; 25397049Speter 25497049Speter if (!log_console_output) 25597049Speter return; 25697049Speter 25797049Speter pri = LOG_INFO | LOG_CONSOLE; 25897049Speter muio = *uio; 25997049Speter iovlen = uio->uio_iovcnt * sizeof (struct iovec); 26097049Speter MALLOC(miov, struct iovec *, iovlen, M_TEMP, M_WAITOK); 26197049Speter MALLOC(consbuffer, char *, CONSCHUNK, M_TEMP, M_WAITOK); 26297049Speter bcopy(muio.uio_iov, miov, iovlen); 26397049Speter muio.uio_iov = miov; 26497049Speter uio = &muio; 26597049Speter 26697049Speter nl = 0; 26797049Speter while (uio->uio_resid > 0) { 26897049Speter c = imin(uio->uio_resid, CONSCHUNK); 26997049Speter error = uiomove(consbuffer, c, uio); 27097049Speter if (error != 0) 27197049Speter break; 27297049Speter for (i = 0; i < c; i++) { 27397049Speter msglogchar(consbuffer[i], pri); 27497049Speter if (consbuffer[i] == '\n') 27597049Speter nl = 1; 27697049Speter else 27797049Speter nl = 0; 27897049Speter } 27997049Speter } 28097049Speter if (!nl) 28197049Speter msglogchar('\n', pri); 282166124Srafan msgbuftrigger = 1; 283166124Srafan FREE(miov, M_TEMP); 28497049Speter FREE(consbuffer, M_TEMP); 28597049Speter return; 28697049Speter} 28797049Speter 28897049Speterint 28997049Speterprintf(const char *fmt, ...) 29097049Speter{ 29197049Speter va_list ap; 29297049Speter int savintr; 29397049Speter struct putchar_arg pca; 29497049Speter int retval; 29597049Speter 29697049Speter savintr = consintr; /* disable interrupts */ 29797049Speter consintr = 0; 29897049Speter va_start(ap, fmt); 29997049Speter pca.tty = NULL; 30097049Speter pca.flags = TOCONS | TOLOG; 30197049Speter pca.pri = -1; 30297049Speter retval = kvprintf(fmt, putchar, &pca, 10, ap); 30397049Speter va_end(ap); 30497049Speter if (!panicstr) 30597049Speter msgbuftrigger = 1; 30697049Speter consintr = savintr; /* reenable interrupts */ 30797049Speter return (retval); 30897049Speter} 30997049Speter 31097049Speterint 31197049Spetervprintf(const char *fmt, va_list ap) 31297049Speter{ 31397049Speter int savintr; 31497049Speter struct putchar_arg pca; 31597049Speter int retval; 31697049Speter 31797049Speter savintr = consintr; /* disable interrupts */ 31897049Speter consintr = 0; 31997049Speter pca.tty = NULL; 32097049Speter pca.flags = TOCONS | TOLOG; 32197049Speter pca.pri = -1; 32297049Speter retval = kvprintf(fmt, putchar, &pca, 10, ap); 32397049Speter if (!panicstr) 32497049Speter msgbuftrigger = 1; 32597049Speter consintr = savintr; /* reenable interrupts */ 32697049Speter return (retval); 32797049Speter} 32897049Speter 32997049Speter/* 33097049Speter * Print a character on console or users terminal. If destination is 33197049Speter * the console then the last bunch of characters are saved in msgbuf for 33297049Speter * inspection later. 33397049Speter */ 33497049Speterstatic void 33597049Speterputchar(int c, void *arg) 33697049Speter{ 33797049Speter struct putchar_arg *ap = (struct putchar_arg*) arg; 33897049Speter int flags = ap->flags; 33997049Speter struct tty *tp = ap->tty; 34097049Speter if (panicstr) 34197049Speter constty = NULL; 34297049Speter if ((flags & TOCONS) && tp == NULL && constty) { 34397049Speter tp = constty; 34497049Speter flags |= TOTTY; 34597049Speter } 34697049Speter if ((flags & TOTTY) && tp && tputchar(c, tp) < 0 && 34797049Speter (flags & TOCONS) && tp == constty) 34897049Speter constty = NULL; 34997049Speter if ((flags & TOLOG)) 35097049Speter msglogchar(c, ap->pri); 35197049Speter if ((flags & TOCONS) && constty == NULL && c != '\0') 35297049Speter (*v_putc)(c); 35397049Speter} 35497049Speter 35597049Speter/* 35697049Speter * Scaled down version of sprintf(3). 35797049Speter */ 35897049Speterint 35997049Spetersprintf(char *buf, const char *cfmt, ...) 36097049Speter{ 36197049Speter int retval; 36297049Speter va_list ap; 36397049Speter 36497049Speter va_start(ap, cfmt); 36597049Speter retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap); 36697049Speter buf[retval] = '\0'; 36797049Speter va_end(ap); 36897049Speter return (retval); 36997049Speter} 37097049Speter 37197049Speter/* 37297049Speter * Scaled down version of vsprintf(3). 37397049Speter */ 37497049Speterint 37597049Spetervsprintf(char *buf, const char *cfmt, va_list ap) 37697049Speter{ 37797049Speter int retval; 37897049Speter 37997049Speter retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap); 38097049Speter buf[retval] = '\0'; 38197049Speter return (retval); 38297049Speter} 38397049Speter 38497049Speter/* 38597049Speter * Scaled down version of snprintf(3). 38697049Speter */ 38797049Speterint 38897049Spetersnprintf(char *str, size_t size, const char *format, ...) 38997049Speter{ 39097049Speter int retval; 39197049Speter va_list ap; 39297049Speter 39397049Speter va_start(ap, format); 39497049Speter retval = vsnprintf(str, size, format, ap); 39597049Speter va_end(ap); 39697049Speter return(retval); 39797049Speter} 39897049Speter 39997049Speter/* 40097049Speter * Scaled down version of vsnprintf(3). 40197049Speter */ 40297049Speterint 40397049Spetervsnprintf(char *str, size_t size, const char *format, va_list ap) 40497049Speter{ 40597049Speter struct snprintf_arg info; 40697049Speter int retval; 40797049Speter 40897049Speter info.str = str; 40997049Speter info.remain = size; 41097049Speter retval = kvprintf(format, snprintf_func, &info, 10, ap); 41197049Speter if (info.remain >= 1) 41297049Speter *info.str++ = '\0'; 41397049Speter return (retval); 41497049Speter} 41597049Speter 41697049Speter/* 41797049Speter * Kernel version which takes radix argument vsnprintf(3). 41897049Speter */ 41997049Speterint 42097049Spetervsnrprintf(char *str, size_t size, int radix, const char *format, va_list ap) 42197049Speter{ 42297049Speter struct snprintf_arg info; 42397049Speter int retval; 42497049Speter 42597049Speter info.str = str; 42697049Speter info.remain = size; 42797049Speter retval = kvprintf(format, snprintf_func, &info, radix, ap); 42897049Speter if (info.remain >= 1) 42997049Speter *info.str++ = '\0'; 43097049Speter return (retval); 43197049Speter} 43297049Speter 43397049Speterstatic void 43497049Spetersnprintf_func(int ch, void *arg) 43597049Speter{ 43697049Speter struct snprintf_arg *const info = arg; 43797049Speter 43897049Speter if (info->remain >= 2) { 43997049Speter *info->str++ = ch; 44097049Speter info->remain--; 44197049Speter } 44297049Speter} 44397049Speter 44497049Speter/* 44597049Speter * Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse 44697049Speter * order; return an optional length and a pointer to the last character 44797049Speter * written in the buffer (i.e., the first character of the string). 44897049Speter * The buffer pointed to by `nbuf' must have length >= MAXNBUF. 44997049Speter */ 45097049Speterstatic char * 45197049Speterksprintn(char *nbuf, uintmax_t num, int base, int *lenp) 45297049Speter{ 45397049Speter char *p; 45497049Speter 45597049Speter p = nbuf; 45697049Speter *p = '\0'; 45797049Speter do { 45897049Speter *++p = hex2ascii(num % base); 45997049Speter } while (num /= base); 46097049Speter if (lenp) 46197049Speter *lenp = p - nbuf; 46297049Speter return (p); 46397049Speter} 46497049Speter 46597049Speter/* 46697049Speter * Scaled down version of printf(3). 46797049Speter * 46897049Speter * Two additional formats: 46997049Speter * 47097049Speter * The format %b is supported to decode error registers. 47197049Speter * Its usage is: 47297049Speter * 47397049Speter * printf("reg=%b\n", regval, "<base><arg>*"); 47497049Speter * 47597049Speter * where <base> is the output base expressed as a control character, e.g. 47697049Speter * \10 gives octal; \20 gives hex. Each arg is a sequence of characters, 47797049Speter * the first of which gives the bit number to be inspected (origin 1), and 47897049Speter * the next characters (up to a control character, i.e. a character <= 32), 47997049Speter * give the name of the register. Thus: 48097049Speter * 48197049Speter * kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n"); 48297049Speter * 48397049Speter * would produce output: 48497049Speter * 48597049Speter * reg=3<BITTWO,BITONE> 48697049Speter * 48797049Speter * XXX: %D -- Hexdump, takes pointer and separator string: 48897049Speter * ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX 48997049Speter * ("%*D", len, ptr, " " -> XX XX XX XX ... 49097049Speter */ 49197049Speterint 49297049Speterkvprintf(char const *fmt, void (*func)(int, void*), void *arg, int radix, va_list ap) 49397049Speter{ 49497049Speter#define PCHAR(c) {int cc=(c); if (func) (*func)(cc,arg); else *d++ = cc; retval++; } 49597049Speter char nbuf[MAXNBUF]; 49697049Speter char *d; 49797049Speter const char *p, *percent, *q; 49897049Speter u_char *up; 49997049Speter int ch, n; 50097049Speter uintmax_t num; 50197049Speter int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot; 50297049Speter int jflag, tflag, zflag; 50397049Speter int dwidth; 50497049Speter char padc; 50597049Speter int retval = 0; 50697049Speter 50797049Speter num = 0; 50897049Speter if (!func) 50997049Speter d = (char *) arg; 51097049Speter else 51197049Speter d = NULL; 51297049Speter 51397049Speter if (fmt == NULL) 51497049Speter fmt = "(fmt null)\n"; 51597049Speter 51697049Speter if (radix < 2 || radix > 36) 51797049Speter radix = 10; 51897049Speter 51997049Speter for (;;) { 52097049Speter padc = ' '; 52197049Speter width = 0; 52297049Speter while ((ch = (u_char)*fmt++) != '%') { 52397049Speter if (ch == '\0') 52497049Speter return (retval); 52597049Speter PCHAR(ch); 52697049Speter } 52797049Speter percent = fmt - 1; 52897049Speter qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0; 52997049Speter sign = 0; dot = 0; dwidth = 0; 53097049Speter jflag = 0; tflag = 0; zflag = 0; 53197049Speterreswitch: switch (ch = (u_char)*fmt++) { 53297049Speter case '.': 53397049Speter dot = 1; 53497049Speter goto reswitch; 53597049Speter case '#': 53697049Speter sharpflag = 1; 53797049Speter goto reswitch; 53897049Speter case '+': 53997049Speter sign = 1; 54097049Speter goto reswitch; 54197049Speter case '-': 54297049Speter ladjust = 1; 54397049Speter goto reswitch; 54497049Speter case '%': 54597049Speter PCHAR(ch); 54697049Speter break; 54797049Speter case '*': 54897049Speter if (!dot) { 54997049Speter width = va_arg(ap, int); 55097049Speter if (width < 0) { 55197049Speter ladjust = !ladjust; 55297049Speter width = -width; 55397049Speter } 55497049Speter } else { 55597049Speter dwidth = va_arg(ap, int); 55697049Speter } 55797049Speter goto reswitch; 55897049Speter case '0': 55997049Speter if (!dot) { 56097049Speter padc = '0'; 56197049Speter goto reswitch; 56297049Speter } 56397049Speter case '1': case '2': case '3': case '4': 56497049Speter case '5': case '6': case '7': case '8': case '9': 56597049Speter for (n = 0;; ++fmt) { 56697049Speter n = n * 10 + ch - '0'; 56797049Speter ch = *fmt; 56897049Speter if (ch < '0' || ch > '9') 56997049Speter break; 57097049Speter } 57197049Speter if (dot) 57297049Speter dwidth = n; 57397049Speter else 57497049Speter width = n; 57597049Speter goto reswitch; 57697049Speter case 'b': 57797049Speter num = (u_int)va_arg(ap, int); 57897049Speter p = va_arg(ap, char *); 57997049Speter for (q = ksprintn(nbuf, num, *p++, NULL); *q;) 58097049Speter PCHAR(*q--); 58197049Speter 58297049Speter if (num == 0) 58397049Speter break; 58497049Speter 58597049Speter for (tmp = 0; *p;) { 58697049Speter n = *p++; 58797049Speter if (num & (1 << (n - 1))) { 58897049Speter PCHAR(tmp ? ',' : '<'); 58997049Speter for (; (n = *p) > ' '; ++p) 59097049Speter PCHAR(n); 59197049Speter tmp = 1; 59297049Speter } else 59397049Speter for (; *p > ' '; ++p) 59497049Speter continue; 59597049Speter } 59697049Speter if (tmp) 59797049Speter PCHAR('>'); 59897049Speter break; 59997049Speter case 'c': 60097049Speter PCHAR(va_arg(ap, int)); 60197049Speter break; 60297049Speter case 'D': 60397049Speter up = va_arg(ap, u_char *); 60497049Speter p = va_arg(ap, char *); 60597049Speter if (!width) 60697049Speter width = 16; 60797049Speter while(width--) { 60897049Speter PCHAR(hex2ascii(*up >> 4)); 60997049Speter PCHAR(hex2ascii(*up & 0x0f)); 61097049Speter up++; 61197049Speter if (width) 61297049Speter for (q=p;*q;q++) 61397049Speter PCHAR(*q); 61497049Speter } 61597049Speter break; 61697049Speter case 'd': 61797049Speter case 'i': 61897049Speter base = 10; 61997049Speter sign = 1; 62097049Speter goto handle_sign; 62197049Speter case 'j': 62297049Speter jflag = 1; 62397049Speter goto reswitch; 62497049Speter case 'l': 62597049Speter if (lflag) { 62697049Speter lflag = 0; 62797049Speter qflag = 1; 62897049Speter } else 62997049Speter lflag = 1; 63097049Speter goto reswitch; 63197049Speter case 'n': 63297049Speter if (jflag) 63397049Speter *(va_arg(ap, intmax_t *)) = retval; 63497049Speter else if (qflag) 63597049Speter *(va_arg(ap, quad_t *)) = retval; 63697049Speter else if (lflag) 63797049Speter *(va_arg(ap, long *)) = retval; 63897049Speter else if (zflag) 63997049Speter *(va_arg(ap, size_t *)) = retval; 64097049Speter else 64197049Speter *(va_arg(ap, int *)) = retval; 64297049Speter break; 64397049Speter case 'o': 64497049Speter base = 8; 64597049Speter goto handle_nosign; 64697049Speter case 'p': 64797049Speter base = 16; 64897049Speter sharpflag = (width == 0); 64997049Speter sign = 0; 65097049Speter num = (uintptr_t)va_arg(ap, void *); 65197049Speter goto number; 65297049Speter case 'q': 65397049Speter qflag = 1; 65497049Speter goto reswitch; 65597049Speter case 'r': 65697049Speter base = radix; 65797049Speter if (sign) 65897049Speter goto handle_sign; 65997049Speter goto handle_nosign; 66097049Speter case 's': 66197049Speter p = va_arg(ap, char *); 66297049Speter if (p == NULL) 66397049Speter p = "(null)"; 66497049Speter if (!dot) 66597049Speter n = strlen (p); 66697049Speter else 66797049Speter for (n = 0; n < dwidth && p[n]; n++) 66897049Speter continue; 66997049Speter 67097049Speter width -= n; 67197049Speter 67297049Speter if (!ladjust && width > 0) 67397049Speter while (width--) 67497049Speter PCHAR(padc); 67597049Speter while (n--) 67697049Speter PCHAR(*p++); 67797049Speter if (ladjust && width > 0) 67897049Speter while (width--) 67997049Speter PCHAR(padc); 68097049Speter break; 68197049Speter case 't': 68297049Speter tflag = 1; 68397049Speter goto reswitch; 68497049Speter case 'u': 68597049Speter base = 10; 68697049Speter goto handle_nosign; 68797049Speter case 'x': 68897049Speter case 'X': 68997049Speter base = 16; 69097049Speter goto handle_nosign; 69197049Speter case 'y': 69297049Speter base = 16; 69397049Speter sign = 1; 69497049Speter goto handle_sign; 69597049Speter case 'z': 69697049Speter zflag = 1; 69797049Speter goto reswitch; 69897049Speterhandle_nosign: 69997049Speter sign = 0; 70097049Speter if (jflag) 70197049Speter num = va_arg(ap, uintmax_t); 70297049Speter else if (qflag) 70397049Speter num = va_arg(ap, u_quad_t); 70497049Speter else if (tflag) 70597049Speter num = va_arg(ap, ptrdiff_t); 70697049Speter else if (lflag) 70797049Speter num = va_arg(ap, u_long); 70897049Speter else if (zflag) 70997049Speter num = va_arg(ap, size_t); 71097049Speter else 71197049Speter num = va_arg(ap, u_int); 71297049Speter goto number; 71397049Speterhandle_sign: 71497049Speter if (jflag) 71597049Speter num = va_arg(ap, intmax_t); 71697049Speter else if (qflag) 71797049Speter num = va_arg(ap, quad_t); 71897049Speter else if (tflag) 71997049Speter num = va_arg(ap, ptrdiff_t); 72097049Speter else if (lflag) 72197049Speter num = va_arg(ap, long); 72297049Speter else if (zflag) 72397049Speter num = va_arg(ap, size_t); 72497049Speter else 72597049Speter num = va_arg(ap, int); 72697049Speternumber: 72797049Speter if (sign && (intmax_t)num < 0) { 72897049Speter neg = 1; 72997049Speter num = -(intmax_t)num; 73097049Speter } 73197049Speter p = ksprintn(nbuf, num, base, &tmp); 73297049Speter if (sharpflag && num != 0) { 73397049Speter if (base == 8) 73497049Speter tmp++; 73597049Speter else if (base == 16) 73697049Speter tmp += 2; 73797049Speter } 73897049Speter if (neg) 73997049Speter tmp++; 74097049Speter 74197049Speter if (!ladjust && width && (width -= tmp) > 0) 74297049Speter while (width--) 74397049Speter PCHAR(padc); 74497049Speter if (neg) 74597049Speter PCHAR('-'); 74697049Speter if (sharpflag && num != 0) { 74797049Speter if (base == 8) { 74897049Speter PCHAR('0'); 74997049Speter } else if (base == 16) { 75097049Speter PCHAR('0'); 75197049Speter PCHAR('x'); 75297049Speter } 75397049Speter } 75497049Speter 75597049Speter while (*p) 75697049Speter PCHAR(*p--); 75797049Speter 75897049Speter if (ladjust && width && (width -= tmp) > 0) 75997049Speter while (width--) 76097049Speter PCHAR(padc); 76197049Speter 76297049Speter break; 76397049Speter default: 76497049Speter while (percent < fmt) 76597049Speter PCHAR(*percent++); 76697049Speter break; 76797049Speter } 76897049Speter } 76997049Speter#undef PCHAR 77097049Speter} 77197049Speter 77297049Speter/* 77397049Speter * Put character in log buffer with a particular priority. 77497049Speter */ 77597049Speterstatic void 77697049Spetermsglogchar(int c, int pri) 77797049Speter{ 77897049Speter static int lastpri = -1; 77997049Speter static int dangling; 78097049Speter char nbuf[MAXNBUF]; 78197049Speter char *p; 78297049Speter 78397049Speter if (!msgbufmapped) 78497049Speter return; 78597049Speter if (c == '\0' || c == '\r') 78697049Speter return; 78797049Speter if (pri != -1 && pri != lastpri) { 78897049Speter if (dangling) { 78997049Speter msgbuf_addchar(msgbufp, '\n'); 79097049Speter dangling = 0; 79197049Speter } 79297049Speter msgbuf_addchar(msgbufp, '<'); 79397049Speter for (p = ksprintn(nbuf, (uintmax_t)pri, 10, NULL); *p;) 79497049Speter msgbuf_addchar(msgbufp, *p--); 79597049Speter msgbuf_addchar(msgbufp, '>'); 79697049Speter lastpri = pri; 79797049Speter } 79897049Speter msgbuf_addchar(msgbufp, c); 79997049Speter if (c == '\n') { 80097049Speter dangling = 0; 80197049Speter lastpri = -1; 80297049Speter } else { 80397049Speter dangling = 1; 80497049Speter } 80597049Speter} 80697049Speter 80797049Spetervoid 80897049Spetermsgbufinit(void *ptr, int size) 80997049Speter{ 81097049Speter char *cp; 81197049Speter static struct msgbuf *oldp = NULL; 81297049Speter 81397049Speter size -= sizeof(*msgbufp); 81497049Speter cp = (char *)ptr; 81597049Speter msgbufp = (struct msgbuf *)(cp + size); 81697049Speter msgbuf_reinit(msgbufp, cp, size); 81797049Speter if (msgbufmapped && oldp != msgbufp) 81897049Speter msgbuf_copy(oldp, msgbufp); 81997049Speter msgbufmapped = 1; 82097049Speter oldp = msgbufp; 82197049Speter} 82297049Speter 82397049SpeterSYSCTL_DECL(_security_bsd); 82497049Speter 82597049Speterstatic int unprivileged_read_msgbuf = 1; 82697049SpeterSYSCTL_INT(_security_bsd, OID_AUTO, unprivileged_read_msgbuf, 82797049Speter CTLFLAG_RW, &unprivileged_read_msgbuf, 0, 82897049Speter "Unprivileged processes may read the kernel message buffer"); 82997049Speter 83097049Speter/* Sysctls for accessing/clearing the msgbuf */ 83197049Speterstatic int 83297049Spetersysctl_kern_msgbuf(SYSCTL_HANDLER_ARGS) 83397049Speter{ 83497049Speter char buf[128]; 83597049Speter u_int seq; 83697049Speter int error, len; 83797049Speter 83897049Speter if (!unprivileged_read_msgbuf) { 83997049Speter error = suser(req->td); 84097049Speter if (error) 84197049Speter return (error); 84297049Speter } 84397049Speter 84497049Speter /* Read the whole buffer, one chunk at a time. */ 84597049Speter msgbuf_peekbytes(msgbufp, NULL, 0, &seq); 84697049Speter while ((len = msgbuf_peekbytes(msgbufp, buf, sizeof(buf), &seq)) > 0) { 84797049Speter error = sysctl_handle_opaque(oidp, buf, len, req); 84897049Speter if (error) 84997049Speter return (error); 85097049Speter } 85197049Speter return (0); 85297049Speter} 85397049Speter 85497049SpeterSYSCTL_PROC(_kern, OID_AUTO, msgbuf, CTLTYPE_STRING | CTLFLAG_RD, 85597049Speter 0, 0, sysctl_kern_msgbuf, "A", "Contents of kernel message buffer"); 85697049Speter 85797049Speterstatic int msgbuf_clearflag; 85897049Speter 85997049Speterstatic int 86097049Spetersysctl_kern_msgbuf_clear(SYSCTL_HANDLER_ARGS) 86197049Speter{ 86297049Speter int error; 86397049Speter error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req); 86497049Speter if (!error && req->newptr) { 86597049Speter msgbuf_clear(msgbufp); 86697049Speter msgbuf_clearflag = 0; 86797049Speter } 86897049Speter return (error); 86997049Speter} 87097049Speter 87197049SpeterSYSCTL_PROC(_kern, OID_AUTO, msgbuf_clear, 87297049Speter CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_SECURE, &msgbuf_clearflag, 0, 87397049Speter sysctl_kern_msgbuf_clear, "I", "Clear kernel message buffer"); 87497049Speter 87597049Speter#ifdef DDB 87697049Speter 87797049SpeterDB_SHOW_COMMAND(msgbuf, db_show_msgbuf) 87897049Speter{ 87997049Speter int i, j; 88097049Speter 88197049Speter if (!msgbufmapped) { 88297049Speter db_printf("msgbuf not mapped yet\n"); 88397049Speter return; 88497049Speter } 88597049Speter db_printf("msgbufp = %p\n", msgbufp); 88697049Speter db_printf("magic = %x, size = %d, r= %u, w = %u, ptr = %p, cksum= %u\n", 88797049Speter msgbufp->msg_magic, msgbufp->msg_size, msgbufp->msg_rseq, 88897049Speter msgbufp->msg_wseq, msgbufp->msg_ptr, msgbufp->msg_cksum); 88997049Speter for (i = 0; i < msgbufp->msg_size; i++) { 89097049Speter j = MSGBUF_SEQ_TO_POS(msgbufp, i + msgbufp->msg_rseq); 89197049Speter db_printf("%c", msgbufp->msg_ptr[j]); 89297049Speter } 89397049Speter db_printf("\n"); 89497049Speter} 89597049Speter 89697049Speter#endif /* DDB */ 89797049Speter