hexdump.c revision 1817
1/*- 2 * Copyright (c) 1986, 1988, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)subr_prf.c 8.3 (Berkeley) 1/21/94 39 * $Id$ 40 */ 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/buf.h> 45#include <sys/conf.h> 46#include <sys/reboot.h> 47#include <sys/msgbuf.h> 48#include <sys/proc.h> 49#include <sys/ioctl.h> 50#include <sys/vnode.h> 51#include <sys/file.h> 52#include <sys/tty.h> 53#include <sys/tprintf.h> 54#include <sys/syslog.h> 55#include <sys/malloc.h> 56 57/* 58 * Note that stdarg.h and the ANSI style va_start macro is used for both 59 * ANSI and traditional C compilers. 60 */ 61#include <machine/stdarg.h> 62 63#ifdef KADB 64#include <machine/kdbparam.h> 65#endif 66 67#define TOCONS 0x01 68#define TOTTY 0x02 69#define TOLOG 0x04 70 71struct tty *constty; /* pointer to console "window" tty */ 72 73extern cnputc(); /* standard console putc */ 74int (*v_putc)() = cnputc; /* routine to putc on virtual console */ 75 76void logpri __P((int level)); 77static void putchar __P((int ch, int flags, struct tty *tp)); 78static char *ksprintn __P((u_long num, int base, int *len)); 79void kprintf __P((const char *fmt, int flags, struct tty *tp, va_list ap)); 80 81int consintr = 1; /* Ok to handle console interrupts? */ 82 83/* 84 * Variable panicstr contains argument to first call to panic; used as flag 85 * to indicate that the kernel has already called panic. 86 */ 87const char *panicstr; 88 89/* 90 * Panic is called on unresolvable fatal errors. It prints "panic: mesg", 91 * and then reboots. If we are called twice, then we avoid trying to sync 92 * the disks as this often leads to recursive panics. 93 */ 94#ifdef __GNUC__ 95volatile void boot(int flags); /* boot() does not return */ 96volatile /* panic() does not return */ 97#endif 98void 99#ifdef __STDC__ 100panic(const char *fmt, ...) 101#else 102panic(fmt, va_alist) 103 char *fmt; 104#endif 105{ 106 int bootopt; 107 va_list ap; 108 109 bootopt = RB_AUTOBOOT | RB_DUMP; 110 if (panicstr) 111 bootopt |= RB_NOSYNC; 112 else 113 panicstr = fmt; 114 115 va_start(ap, fmt); 116 printf("panic: %r\n", fmt, ap); 117 va_end(ap); 118 119#ifdef KGDB 120 kgdb_panic(); 121#endif 122#ifdef KADB 123 if (boothowto & RB_KDB) 124 kdbpanic(); 125#endif 126#include "ddb.h" 127#if NDDB > 0 128 Debugger ("panic"); 129#endif 130 boot(bootopt); 131} 132 133/* 134 * Warn that a system table is full. 135 */ 136void 137tablefull(tab) 138 const char *tab; 139{ 140 141 log(LOG_ERR, "%s: table is full\n", tab); 142} 143 144/* 145 * Uprintf prints to the controlling terminal for the current process. 146 * It may block if the tty queue is overfull. No message is printed if 147 * the queue does not clear in a reasonable time. 148 */ 149void 150#ifdef __STDC__ 151uprintf(const char *fmt, ...) 152#else 153uprintf(fmt, va_alist) 154 char *fmt; 155#endif 156{ 157 register struct proc *p = curproc; 158 va_list ap; 159 160 if (p->p_flag & P_CONTROLT && p->p_session->s_ttyvp) { 161 va_start(ap, fmt); 162 kprintf(fmt, TOTTY, p->p_session->s_ttyp, ap); 163 va_end(ap); 164 } 165} 166 167tpr_t 168tprintf_open(p) 169 register struct proc *p; 170{ 171 172 if (p->p_flag & P_CONTROLT && p->p_session->s_ttyvp) { 173 SESSHOLD(p->p_session); 174 return ((tpr_t) p->p_session); 175 } 176 return ((tpr_t) NULL); 177} 178 179void 180tprintf_close(sess) 181 tpr_t sess; 182{ 183 184 if (sess) 185 SESSRELE((struct session *) sess); 186} 187 188/* 189 * tprintf prints on the controlling terminal associated 190 * with the given session. 191 */ 192void 193#ifdef __STDC__ 194tprintf(tpr_t tpr, const char *fmt, ...) 195#else 196tprintf(tpr, fmt, va_alist) 197 tpr_t tpr; 198 char *fmt; 199#endif 200{ 201 register struct session *sess = (struct session *)tpr; 202 struct tty *tp = NULL; 203 int flags = TOLOG; 204 va_list ap; 205 206 logpri(LOG_INFO); 207 if (sess && sess->s_ttyvp && ttycheckoutq(sess->s_ttyp, 0)) { 208 flags |= TOTTY; 209 tp = sess->s_ttyp; 210 } 211 va_start(ap, fmt); 212 kprintf(fmt, flags, tp, ap); 213 va_end(ap); 214 logwakeup(); 215} 216 217/* 218 * Ttyprintf displays a message on a tty; it should be used only by 219 * the tty driver, or anything that knows the underlying tty will not 220 * be revoke(2)'d away. Other callers should use tprintf. 221 */ 222void 223#ifdef __STDC__ 224ttyprintf(struct tty *tp, const char *fmt, ...) 225#else 226ttyprintf(tp, fmt, va_alist) 227 struct tty *tp; 228 char *fmt; 229#endif 230{ 231 va_list ap; 232 233 va_start(ap, fmt); 234 kprintf(fmt, TOTTY, tp, ap); 235 va_end(ap); 236} 237 238extern int log_open; 239 240/* 241 * Log writes to the log buffer, and guarantees not to sleep (so can be 242 * called by interrupt routines). If there is no process reading the 243 * log yet, it writes to the console also. 244 */ 245void 246#ifdef __STDC__ 247log(int level, const char *fmt, ...) 248#else 249log(level, fmt, va_alist) 250 int level; 251 char *fmt; 252#endif 253{ 254 register int s; 255 va_list ap; 256 257 s = splhigh(); 258 logpri(level); 259 va_start(ap, fmt); 260 kprintf(fmt, TOLOG, NULL, ap); 261 splx(s); 262 va_end(ap); 263 if (!log_open) { 264 va_start(ap, fmt); 265 kprintf(fmt, TOCONS, NULL, ap); 266 va_end(ap); 267 } 268 logwakeup(); 269} 270 271void 272logpri(level) 273 int level; 274{ 275 register int ch; 276 register char *p; 277 278 putchar('<', TOLOG, NULL); 279 for (p = ksprintn((u_long)level, 10, NULL); ch = *p--;) 280 putchar(ch, TOLOG, NULL); 281 putchar('>', TOLOG, NULL); 282} 283 284void 285#ifdef __STDC__ 286addlog(const char *fmt, ...) 287#else 288addlog(fmt, va_alist) 289 char *fmt; 290#endif 291{ 292 register int s; 293 va_list ap; 294 295 s = splhigh(); 296 va_start(ap, fmt); 297 kprintf(fmt, TOLOG, NULL, ap); 298 splx(s); 299 va_end(ap); 300 if (!log_open) { 301 va_start(ap, fmt); 302 kprintf(fmt, TOCONS, NULL, ap); 303 va_end(ap); 304 } 305 logwakeup(); 306} 307 308void 309#ifdef __STDC__ 310printf(const char *fmt, ...) 311#else 312printf(fmt, va_alist) 313 char *fmt; 314#endif 315{ 316 va_list ap; 317 register int savintr; 318 319 savintr = consintr; /* disable interrupts */ 320 consintr = 0; 321 va_start(ap, fmt); 322 kprintf(fmt, TOCONS | TOLOG, NULL, ap); 323 va_end(ap); 324 if (!panicstr) 325 logwakeup(); 326 consintr = savintr; /* reenable interrupts */ 327} 328 329/* 330 * Scaled down version of printf(3). 331 * 332 * Two additional formats: 333 * 334 * The format %b is supported to decode error registers. 335 * Its usage is: 336 * 337 * printf("reg=%b\n", regval, "<base><arg>*"); 338 * 339 * where <base> is the output base expressed as a control character, e.g. 340 * \10 gives octal; \20 gives hex. Each arg is a sequence of characters, 341 * the first of which gives the bit number to be inspected (origin 1), and 342 * the next characters (up to a control character, i.e. a character <= 32), 343 * give the name of the register. Thus: 344 * 345 * kprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n"); 346 * 347 * would produce output: 348 * 349 * reg=3<BITTWO,BITONE> 350 * 351 * The format %r passes an additional format string and argument list 352 * recursively. Its usage is: 353 * 354 * fn(char *fmt, ...) 355 * { 356 * va_list ap; 357 * va_start(ap, fmt); 358 * printf("prefix: %r: suffix\n", fmt, ap); 359 * va_end(ap); 360 * } 361 * 362 * Space or zero padding and a field width are supported for the numeric 363 * formats only. 364 */ 365void 366kprintf(fmt, flags, tp, ap) 367 register const char *fmt; 368 int flags; 369 struct tty *tp; 370 va_list ap; 371{ 372 register char *p, *q; 373 register int ch, n; 374 u_long ul; 375 int base, lflag, tmp, width; 376 char padc; 377 378 for (;;) { 379 padc = ' '; 380 width = 0; 381 while ((ch = *(u_char *)fmt++) != '%') { 382 if (ch == '\0') 383 return; 384 putchar(ch, flags, tp); 385 } 386 lflag = 0; 387reswitch: switch (ch = *(u_char *)fmt++) { 388 case '0': 389 padc = '0'; 390 goto reswitch; 391 case '1': case '2': case '3': case '4': 392 case '5': case '6': case '7': case '8': case '9': 393 for (width = 0;; ++fmt) { 394 width = width * 10 + ch - '0'; 395 ch = *fmt; 396 if (ch < '0' || ch > '9') 397 break; 398 } 399 goto reswitch; 400 case 'l': 401 lflag = 1; 402 goto reswitch; 403 case 'b': 404 ul = va_arg(ap, int); 405 p = va_arg(ap, char *); 406 for (q = ksprintn(ul, *p++, NULL); ch = *q--;) 407 putchar(ch, flags, tp); 408 409 if (!ul) 410 break; 411 412 for (tmp = 0; n = *p++;) { 413 if (ul & (1 << (n - 1))) { 414 putchar(tmp ? ',' : '<', flags, tp); 415 for (; (n = *p) > ' '; ++p) 416 putchar(n, flags, tp); 417 tmp = 1; 418 } else 419 for (; *p > ' '; ++p) 420 continue; 421 } 422 if (tmp) 423 putchar('>', flags, tp); 424 break; 425 case 'c': 426 putchar(va_arg(ap, int), flags, tp); 427 break; 428 case 'r': 429 p = va_arg(ap, char *); 430 kprintf(p, flags, tp, va_arg(ap, va_list)); 431 break; 432 case 's': 433 p = va_arg(ap, char *); 434 while (ch = *p++) 435 putchar(ch, flags, tp); 436 break; 437 case 'd': 438 ul = lflag ? va_arg(ap, long) : va_arg(ap, int); 439 if ((long)ul < 0) { 440 putchar('-', flags, tp); 441 ul = -(long)ul; 442 } 443 base = 10; 444 goto number; 445 case 'o': 446 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int); 447 base = 8; 448 goto number; 449 case 'u': 450 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int); 451 base = 10; 452 goto number; 453 case 'x': 454 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int); 455 base = 16; 456number: p = ksprintn(ul, base, &tmp); 457 if (width && (width -= tmp) > 0) 458 while (width--) 459 putchar(padc, flags, tp); 460 while (ch = *p--) 461 putchar(ch, flags, tp); 462 break; 463 default: 464 putchar('%', flags, tp); 465 if (lflag) 466 putchar('l', flags, tp); 467 /* FALLTHROUGH */ 468 case '%': 469 putchar(ch, flags, tp); 470 } 471 } 472} 473 474/* 475 * Print a character on console or users terminal. If destination is 476 * the console then the last MSGBUFS characters are saved in msgbuf for 477 * inspection later. 478 */ 479static void 480putchar(c, flags, tp) 481 register int c; 482 int flags; 483 struct tty *tp; 484{ 485 extern int msgbufmapped; 486 register struct msgbuf *mbp; 487 488 if (panicstr) 489 constty = NULL; 490 if ((flags & TOCONS) && tp == NULL && constty) { 491 tp = constty; 492 flags |= TOTTY; 493 } 494 if ((flags & TOTTY) && tp && tputchar(c, tp) < 0 && 495 (flags & TOCONS) && tp == constty) 496 constty = NULL; 497 if ((flags & TOLOG) && 498 c != '\0' && c != '\r' && c != 0177 && msgbufmapped) { 499 mbp = msgbufp; 500 if (mbp->msg_magic != MSG_MAGIC) { 501 bzero((caddr_t)mbp, sizeof(*mbp)); 502 mbp->msg_magic = MSG_MAGIC; 503 } 504 mbp->msg_bufc[mbp->msg_bufx++] = c; 505 if (mbp->msg_bufx < 0 || mbp->msg_bufx >= MSG_BSIZE) 506 mbp->msg_bufx = 0; 507 } 508 if ((flags & TOCONS) && constty == NULL && c != '\0') 509 (*v_putc)(c); 510} 511 512/* 513 * Scaled down version of sprintf(3). 514 */ 515#ifdef __STDC__ 516int 517sprintf(char *buf, const char *cfmt, ...) 518#else 519int 520sprintf(buf, cfmt, va_alist) 521 char *buf, *cfmt; 522#endif 523{ 524 register const char *fmt = cfmt; 525 register char *p, *bp; 526 register int ch, base; 527 u_long ul; 528 int lflag; 529 va_list ap; 530 531 va_start(ap, cfmt); 532 for (bp = buf; ; ) { 533 while ((ch = *(u_char *)fmt++) != '%') 534 if ((*bp++ = ch) == '\0') 535 return ((bp - buf) - 1); 536 537 lflag = 0; 538reswitch: switch (ch = *(u_char *)fmt++) { 539 case 'l': 540 lflag = 1; 541 goto reswitch; 542 case 'c': 543 *bp++ = va_arg(ap, int); 544 break; 545 case 's': 546 p = va_arg(ap, char *); 547 while (*bp++ = *p++) 548 continue; 549 --bp; 550 break; 551 case 'd': 552 ul = lflag ? va_arg(ap, long) : va_arg(ap, int); 553 if ((long)ul < 0) { 554 *bp++ = '-'; 555 ul = -(long)ul; 556 } 557 base = 10; 558 goto number; 559 break; 560 case 'o': 561 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int); 562 base = 8; 563 goto number; 564 break; 565 case 'u': 566 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int); 567 base = 10; 568 goto number; 569 break; 570 case 'x': 571 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int); 572 base = 16; 573number: for (p = ksprintn(ul, base, NULL); ch = *p--;) 574 *bp++ = ch; 575 break; 576 default: 577 *bp++ = '%'; 578 if (lflag) 579 *bp++ = 'l'; 580 /* FALLTHROUGH */ 581 case '%': 582 *bp++ = ch; 583 } 584 } 585 va_end(ap); 586} 587 588/* 589 * Put a number (base <= 16) in a buffer in reverse order; return an 590 * optional length and a pointer to the NULL terminated (preceded?) 591 * buffer. 592 */ 593static char * 594ksprintn(ul, base, lenp) 595 register u_long ul; 596 register int base, *lenp; 597{ /* A long in base 8, plus NULL. */ 598 static char buf[sizeof(long) * NBBY / 3 + 2]; 599 register char *p; 600 601 p = buf; 602 do { 603 *++p = "0123456789abcdef"[ul % base]; 604 } while (ul /= base); 605 if (lenp) 606 *lenp = p - buf; 607 return (p); 608} 609