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Sourcecode: freebsd-utils version File versions

kdump.c

/*-
 * Copyright (c) 1988, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 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.
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * 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)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1988, 1993\n\
      The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)kdump.c 8.1 (Berkeley) 6/6/93";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/kdump/kdump.c,v 1.37.2.4.2.1 2008/11/25 02:59:29 kensmith Exp $");

#define _KERNEL
extern int errno;
#include <sys/errno.h>
#undef _KERNEL
#include <sys/param.h>
#include <sys/errno.h>
#define _KERNEL
#include <sys/time.h>
#undef _KERNEL
#include <sys/uio.h>
#include <sys/ktrace.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#ifdef IPX
#include <sys/types.h>
#include <netipx/ipx.h>
#endif
#ifdef NETATALK
#include <netatalk/at.h>
#endif
#include <netinet/in.h>
#include <dlfcn.h>
#include <err.h>
#include <grp.h>
#include <inttypes.h>
#include <locale.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <vis.h>
#include "ktrace.h"
#include "kdump_subr.h"

int fread_tail(void *, int, int);
void dumpheader(struct ktr_header *);
void ktrsyscall(struct ktr_syscall *);
void ktrsysret(struct ktr_sysret *);
void ktrnamei(char *, int);
void hexdump(char *, int, int);
void visdump(char *, int, int);
void ktrgenio(struct ktr_genio *, int);
void ktrpsig(struct ktr_psig *);
void ktrcsw(struct ktr_csw *);
void ktruser(int, unsigned char *);
void ktrsockaddr(struct sockaddr *);
void ktrstat(struct stat *);
void ktrstruct(char *, size_t);
void usage(void);
const char *ioctlname(u_long);

int timestamp, decimal, fancy = 1, suppressdata, tail, threads, maxdata,
    resolv = 0;
const char *tracefile = DEF_TRACEFILE;
struct ktr_header ktr_header;

#define TIME_FORMAT     "%b %e %T %Y"
#define eqs(s1, s2)     (strcmp((s1), (s2)) == 0)

int
main(int argc, char *argv[])
{
      int ch, ktrlen, size;
      void *m;
      int trpoints = ALL_POINTS;
      int drop_logged;
      pid_t pid = 0;

      (void) setlocale(LC_CTYPE, "");

      while ((ch = getopt(argc,argv,"f:dElm:np:HRrsTt:")) != -1)
            switch((char)ch) {
            case 'f':
                  tracefile = optarg;
                  break;
            case 'd':
                  decimal = 1;
                  break;
            case 'l':
                  tail = 1;
                  break;
            case 'm':
                  maxdata = atoi(optarg);
                  break;
            case 'n':
                  fancy = 0;
                  break;
            case 'p':
                  pid = atoi(optarg);
                  break;
            case 'r':
                  resolv = 1;
                  break;
            case 's':
                  suppressdata = 1;
                  break;
            case 'E':
                  timestamp = 3;    /* elapsed timestamp */
                  break;
            case 'H':
                  threads = 1;
                  break;
            case 'R':
                  timestamp = 2;    /* relative timestamp */
                  break;
            case 'T':
                  timestamp = 1;
                  break;
            case 't':
                  trpoints = getpoints(optarg);
                  if (trpoints < 0)
                        errx(1, "unknown trace point in %s", optarg);
                  break;
            default:
                  usage();
            }

      if (argc > optind)
            usage();

      m = (void *)malloc(size = 1025);
      if (m == NULL)
            errx(1, "%s", strerror(ENOMEM));
      if (!freopen(tracefile, "r", stdin))
            err(1, "%s", tracefile);
      drop_logged = 0;
      while (fread_tail(&ktr_header, sizeof(struct ktr_header), 1)) {
            if (ktr_header.ktr_type & KTR_DROP) {
                  ktr_header.ktr_type &= ~KTR_DROP;
                  if (!drop_logged && threads) {
                        (void)printf("%6d %6d %-8.*s Events dropped.\n",
                            ktr_header.ktr_pid, ktr_header.ktr_tid >
                            0 ? ktr_header.ktr_tid : 0, MAXCOMLEN,
                            ktr_header.ktr_comm);
                        drop_logged = 1;
                  } else if (!drop_logged) {
                        (void)printf("%6d %-8.*s Events dropped.\n",
                            ktr_header.ktr_pid, MAXCOMLEN,
                            ktr_header.ktr_comm);
                        drop_logged = 1;
                  }
            }
            if (trpoints & (1<<ktr_header.ktr_type))
                  if (pid == 0 || ktr_header.ktr_pid == pid)
                        dumpheader(&ktr_header);
            if ((ktrlen = ktr_header.ktr_len) < 0)
                  errx(1, "bogus length 0x%x", ktrlen);
            if (ktrlen > size) {
                  m = (void *)realloc(m, ktrlen+1);
                  if (m == NULL)
                        errx(1, "%s", strerror(ENOMEM));
                  size = ktrlen;
            }
            if (ktrlen && fread_tail(m, ktrlen, 1) == 0)
                  errx(1, "data too short");
            if (pid && ktr_header.ktr_pid != pid)
                  continue;
            if ((trpoints & (1<<ktr_header.ktr_type)) == 0)
                  continue;
            drop_logged = 0;
            switch (ktr_header.ktr_type) {
            case KTR_SYSCALL:
                  ktrsyscall((struct ktr_syscall *)m);
                  break;
            case KTR_SYSRET:
                  ktrsysret((struct ktr_sysret *)m);
                  break;
            case KTR_NAMEI:
                  ktrnamei(m, ktrlen);
                  break;
            case KTR_GENIO:
                  ktrgenio((struct ktr_genio *)m, ktrlen);
                  break;
            case KTR_PSIG:
                  ktrpsig((struct ktr_psig *)m);
                  break;
            case KTR_CSW:
                  ktrcsw((struct ktr_csw *)m);
                  break;
            case KTR_USER:
                  ktruser(ktrlen, m);
                  break;
            case KTR_STRUCT:
                  ktrstruct(m, ktrlen);
                  break;
            default:
                  printf("\n");
                  break;
            }
            if (tail)
                  (void)fflush(stdout);
      }
      return 0;
}

int
fread_tail(void *buf, int size, int num)
{
      int i;

      while ((i = fread(buf, size, num, stdin)) == 0 && tail) {
            (void)sleep(1);
            clearerr(stdin);
      }
      return (i);
}

void
dumpheader(struct ktr_header *kth)
{
      static char unknown[64];
      static struct timeval prevtime, temp;
      const char *type;

      switch (kth->ktr_type) {
      case KTR_SYSCALL:
            type = "CALL";
            break;
      case KTR_SYSRET:
            type = "RET ";
            break;
      case KTR_NAMEI:
            type = "NAMI";
            break;
      case KTR_GENIO:
            type = "GIO ";
            break;
      case KTR_PSIG:
            type = "PSIG";
            break;
      case KTR_CSW:
            type = "CSW ";
            break;
      case KTR_USER:
            type = "USER";
            break;
      case KTR_STRUCT:
            type = "STRU";
            break;
      default:
            (void)sprintf(unknown, "UNKNOWN(%d)", kth->ktr_type);
            type = unknown;
      }

      /*
       * The ktr_tid field was previously the ktr_buffer field, which held
       * the kernel pointer value for the buffer associated with data
       * following the record header.  It now holds a threadid, but only
       * for trace files after the change.  Older trace files still contain
       * kernel pointers.  Detect this and suppress the results by printing
       * negative tid's as 0.
       */
      if (threads)
            (void)printf("%6d %6d %-8.*s ", kth->ktr_pid, kth->ktr_tid >
                0 ? kth->ktr_tid : 0, MAXCOMLEN, kth->ktr_comm);
      else
            (void)printf("%6d %-8.*s ", kth->ktr_pid, MAXCOMLEN,
                kth->ktr_comm);
      if (timestamp) {
            if (timestamp == 3) {
                  if (prevtime.tv_sec == 0)
                        prevtime = kth->ktr_time;
                  timevalsub(&kth->ktr_time, &prevtime);
            }
            if (timestamp == 2) {
                  temp = kth->ktr_time;
                  timevalsub(&kth->ktr_time, &prevtime);
                  prevtime = temp;
            }
            (void)printf("%ld.%06ld ",
                kth->ktr_time.tv_sec, kth->ktr_time.tv_usec);
      }
      (void)printf("%s  ", type);
}

#include <sys/syscall.h>
#define KTRACE
#include <sys/kern/syscalls.c>
#undef KTRACE
int nsyscalls = sizeof (syscallnames) / sizeof (syscallnames[0]);

void
ktrsyscall(struct ktr_syscall *ktr)
{
      int narg = ktr->ktr_narg;
      register_t *ip;

      if (ktr->ktr_code >= nsyscalls || ktr->ktr_code < 0)
            (void)printf("[%d]", ktr->ktr_code);
      else
            (void)printf("%s", syscallnames[ktr->ktr_code]);
      ip = &ktr->ktr_args[0];
      if (narg) {
            char c = '(';
            if (fancy) {

#define print_number(i,n,c) do {                      \
      if (decimal)                                  \
            (void)printf("%c%ld", c, (long)*i);   \
      else                                          \
            (void)printf("%c%#lx", c, (long)*i);  \
      i++;                                          \
      n--;                                          \
      c = ',';                                      \
      } while (0);

                  if (ktr->ktr_code == SYS_ioctl) {
                        const char *cp;
                        print_number(ip,narg,c);
                        if ((cp = ioctlname(*ip)) != NULL)
                              (void)printf(",%s", cp);
                        else {
                              if (decimal)
                                    (void)printf(",%ld", (long)*ip);
                              else
                                    (void)printf(",%#lx ", (long)*ip);
                        }
                        c = ',';
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_ptrace) {
                        (void)putchar('(');
                        ptraceopname ((int)*ip);
                        c = ',';
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_access ||
                           ktr->ktr_code == SYS_eaccess) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        accessmodename ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_open) {
                        int   flags;
                        int   mode;
                        print_number(ip,narg,c);
                        flags = *ip;
                        mode = *++ip;
                        (void)putchar(',');
                        flagsandmodename (flags, mode, decimal);
                        ip++;
                        narg-=2;
                  } else if (ktr->ktr_code == SYS_wait4) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        wait4optname ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_chmod ||
                           ktr->ktr_code == SYS_fchmod ||
                           ktr->ktr_code == SYS_lchmod) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        modename ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_mknod) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        modename ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_getfsstat) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        getfsstatflagsname ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_mount) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        mountflagsname ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_unmount) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        mountflagsname ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_recvmsg ||
                           ktr->ktr_code == SYS_sendmsg) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        sendrecvflagsname ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_recvfrom ||
                           ktr->ktr_code == SYS_sendto) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        sendrecvflagsname ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_chflags ||
                           ktr->ktr_code == SYS_fchflags ||
                           ktr->ktr_code == SYS_lchflags) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        modename((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_kill) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        signame((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_reboot) {
                        (void)putchar('(');
                        rebootoptname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_umask) {
                        (void)putchar('(');
                        modename((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_msync) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        msyncflagsname((int)*ip);
                        ip++;
                        narg--;
#ifdef SYS_freebsd6_mmap
                  } else if (ktr->ktr_code == SYS_freebsd6_mmap) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        mmapprotname ((int)*ip);
                        (void)putchar(',');
                        ip++;
                        narg--;
                        mmapflagsname ((int)*ip);
                        ip++;
                        narg--;
#endif
                  } else if (ktr->ktr_code == SYS_mmap) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        mmapprotname ((int)*ip);
                        (void)putchar(',');
                        ip++;
                        narg--;
                        mmapflagsname ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_mprotect) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        mmapprotname ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_madvise) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        madvisebehavname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_setpriority) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        prioname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_fcntl) {
                        int cmd;
                        int arg;
                        print_number(ip,narg,c);
                        cmd = *ip;
                        arg = *++ip;
                        (void)putchar(',');
                        fcntlcmdname(cmd, arg, decimal);
                        ip++;
                        narg-=2;
                  } else if (ktr->ktr_code == SYS_socket) {
                        int sockdomain;
                        (void)putchar('(');
                        sockdomain=(int)*ip;
                        sockdomainname(sockdomain);
                        ip++;
                        narg--;
                        (void)putchar(',');
                        socktypename((int)*ip);
                        ip++;
                        narg--;
                        if (sockdomain == PF_INET ||
                            sockdomain == PF_INET6) {
                              (void)putchar(',');
                              sockipprotoname((int)*ip);
                              ip++;
                              narg--;
                        }
                        c = ',';
                  } else if (ktr->ktr_code == SYS_setsockopt ||
                           ktr->ktr_code == SYS_getsockopt) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        sockoptlevelname((int)*ip, decimal);
                        if ((int)*ip == SOL_SOCKET) {
                              ip++;
                              narg--;
                              (void)putchar(',');
                              sockoptname((int)*ip);
                        }
                        ip++;
                        narg--;
#ifdef SYS_freebsd6_lseek
                  } else if (ktr->ktr_code == SYS_freebsd6_lseek) {
                        print_number(ip,narg,c);
                        /* Hidden 'pad' argument, not in lseek(2) */
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        whencename ((int)*ip);
                        ip++;
                        narg--;
#endif
                  } else if (ktr->ktr_code == SYS_lseek) {
                        print_number(ip,narg,c);
                        /* Hidden 'pad' argument, not in lseek(2) */
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        whencename ((int)*ip);
                        ip++;
                        narg--;

                  } else if (ktr->ktr_code == SYS_flock) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        flockname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_mkfifo ||
                           ktr->ktr_code == SYS_mkdir) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        modename((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_shutdown) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        shutdownhowname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_socketpair) {
                        (void)putchar('(');
                        sockdomainname((int)*ip);
                        ip++;
                        narg--;
                        (void)putchar(',');
                        socktypename((int)*ip);
                        ip++;
                        narg--;
                        c = ',';
                  } else if (ktr->ktr_code == SYS_getrlimit ||
                           ktr->ktr_code == SYS_setrlimit) {
                        (void)putchar('(');
                        rlimitname((int)*ip);
                        ip++;
                        narg--;
                        c = ',';
                  } else if (ktr->ktr_code == SYS_quotactl) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        quotactlname((int)*ip);
                        ip++;
                        narg--;
                        c = ',';
                  } else if (ktr->ktr_code == SYS_nfssvc) {
                        (void)putchar('(');
                        nfssvcname((int)*ip);
                        ip++;
                        narg--;
                        c = ',';
                  } else if (ktr->ktr_code == SYS_rtprio) {
                        (void)putchar('(');
                        rtprioname((int)*ip);
                        ip++;
                        narg--;
                        c = ',';
                  } else if (ktr->ktr_code == SYS___semctl) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        semctlname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_semget) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        semgetname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_msgctl) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        shmctlname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_shmat) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        shmatname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_shmctl) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        shmctlname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_minherit) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        minheritname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_rfork) {
                        (void)putchar('(');
                        rforkname((int)*ip);
                        ip++;
                        narg--;
                        c = ',';
                  } else if (ktr->ktr_code == SYS_lio_listio) {
                        (void)putchar('(');
                        lio_listioname((int)*ip);
                        ip++;
                        narg--;
                        c = ',';
                  } else if (ktr->ktr_code == SYS_mlockall) {
                        (void)putchar('(');
                        mlockallname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_sched_setscheduler) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        schedpolicyname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_sched_get_priority_max ||
                           ktr->ktr_code == SYS_sched_get_priority_min) {
                        (void)putchar('(');
                        schedpolicyname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_sendfile) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        sendfileflagsname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_kldsym) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        kldsymcmdname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_sigprocmask) {
                        (void)putchar('(');
                        sigprocmaskhowname((int)*ip);
                        ip++;
                        narg--;
                        c = ',';
                  } else if (ktr->ktr_code == SYS___acl_get_file ||
                           ktr->ktr_code == SYS___acl_set_file ||
                           ktr->ktr_code == SYS___acl_get_fd ||
                           ktr->ktr_code == SYS___acl_set_fd ||
                           ktr->ktr_code == SYS___acl_delete_file ||
                           ktr->ktr_code == SYS___acl_delete_fd ||
                           ktr->ktr_code == SYS___acl_aclcheck_file ||
                           ktr->ktr_code == SYS___acl_aclcheck_fd ||
                           ktr->ktr_code == SYS___acl_get_link ||
                           ktr->ktr_code == SYS___acl_set_link ||
                           ktr->ktr_code == SYS___acl_delete_link ||
                           ktr->ktr_code == SYS___acl_aclcheck_link) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        acltypename((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_sigaction) {
                        (void)putchar('(');
                        signame((int)*ip);
                        ip++;
                        narg--;
                        c = ',';
                  } else if (ktr->ktr_code == SYS_extattrctl) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        extattrctlname((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_nmount) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        mountflagsname ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_kse_thr_interrupt) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        ksethrcmdname ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_thr_create) {
                        print_number(ip,narg,c);
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        thrcreateflagsname ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_thr_kill) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        signame ((int)*ip);
                        ip++;
                        narg--;
                  } else if (ktr->ktr_code == SYS_kldunloadf) {
                        print_number(ip,narg,c);
                        (void)putchar(',');
                        kldunloadfflagsname ((int)*ip);
                        ip++;
                        narg--;
                  }
            }
            while (narg) {
                  print_number(ip,narg,c);
            }
            (void)putchar(')');
      }
      (void)putchar('\n');
}

void
ktrsysret(struct ktr_sysret *ktr)
{
      register_t ret = ktr->ktr_retval;
      int error = ktr->ktr_error;
      int code = ktr->ktr_code;

      if (code >= nsyscalls || code < 0)
            (void)printf("[%d] ", code);
      else
            (void)printf("%s ", syscallnames[code]);

      if (error == 0) {
            if (fancy) {
                  (void)printf("%d", ret);
                  if (ret < 0 || ret > 9)
                        (void)printf("/%#lx", (long)ret);
            } else {
                  if (decimal)
                        (void)printf("%ld", (long)ret);
                  else
                        (void)printf("%#lx", (long)ret);
            }
      } else if (error == ERESTART)
            (void)printf("RESTART");
      else if (error == EJUSTRETURN)
            (void)printf("JUSTRETURN");
      else {
            (void)printf("-1 errno %d", ktr->ktr_error);
            if (fancy)
                  (void)printf(" %s", strerror(ktr->ktr_error));
      }
      (void)putchar('\n');
}

void
ktrnamei(char *cp, int len)
{
      (void)printf("\"%.*s\"\n", len, cp);
}

void
hexdump(char *p, int len, int screenwidth)
{
      int n, i;
      int width;

      width = 0;
      do {
            width += 2;
            i = 13;                 /* base offset */
            i += (width / 2) + 1;   /* spaces every second byte */
            i += (width * 2); /* width of bytes */
            i += 3;                 /* "  |" */
            i += width;       /* each byte */
            i += 1;                 /* "|" */
      } while (i < screenwidth);
      width -= 2;

      for (n = 0; n < len; n += width) {
            for (i = n; i < n + width; i++) {
                  if ((i % width) == 0) { /* beginning of line */
                        printf("       0x%04x", i);
                  }
                  if ((i % 2) == 0) {
                        printf(" ");
                  }
                  if (i < len)
                        printf("%02x", p[i] & 0xff);
                  else
                        printf("  ");
            }
            printf("  |");
            for (i = n; i < n + width; i++) {
                  if (i >= len)
                        break;
                  if (p[i] >= ' ' && p[i] <= '~')
                        printf("%c", p[i]);
                  else
                        printf(".");
            }
            printf("|\n");
      }
      if ((i % width) != 0)
            printf("\n");
}

void
visdump(char *dp, int datalen, int screenwidth)
{
      int col = 0;
      char *cp;
      int width;
      char visbuf[5];

      (void)printf("       \"");
      col = 8;
      for (;datalen > 0; datalen--, dp++) {
            (void) vis(visbuf, *dp, VIS_CSTYLE, *(dp+1));
            cp = visbuf;
            /*
             * Keep track of printables and
             * space chars (like fold(1)).
             */
            if (col == 0) {
                  (void)putchar('\t');
                  col = 8;
            }
            switch(*cp) {
            case '\n':
                  col = 0;
                  (void)putchar('\n');
                  continue;
            case '\t':
                  width = 8 - (col&07);
                  break;
            default:
                  width = strlen(cp);
            }
            if (col + width > (screenwidth-2)) {
                  (void)printf("\\\n\t");
                  col = 8;
            }
            col += width;
            do {
                  (void)putchar(*cp++);
            } while (*cp);
      }
      if (col == 0)
            (void)printf("       ");
      (void)printf("\"\n");
}

void
ktrgenio(struct ktr_genio *ktr, int len)
{
      int datalen = len - sizeof (struct ktr_genio);
      char *dp = (char *)ktr + sizeof (struct ktr_genio);
      static int screenwidth = 0;
      int i, binary;

      if (screenwidth == 0) {
            struct winsize ws;

            if (fancy && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 &&
                ws.ws_col > 8)
                  screenwidth = ws.ws_col;
            else
                  screenwidth = 80;
      }
      printf("fd %d %s %d byte%s\n", ktr->ktr_fd,
            ktr->ktr_rw == UIO_READ ? "read" : "wrote", datalen,
            datalen == 1 ? "" : "s");
      if (suppressdata)
            return;
      if (maxdata && datalen > maxdata)
            datalen = maxdata;

      for (i = 0, binary = 0; i < datalen && binary == 0; i++)  {
            if (dp[i] >= 32 && dp[i] < 127)
                  continue;
            if (dp[i] == 10 || dp[i] == 13 || dp[i] == 0 || dp[i] == 9)
                  continue;
            binary = 1;
      }
      if (binary)
            hexdump(dp, datalen, screenwidth);
      else
            visdump(dp, datalen, screenwidth);
}

const char *signames[] = {
      "NULL", "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT",   /*  1 - 6  */
      "EMT", "FPE", "KILL", "BUS", "SEGV", "SYS",           /*  7 - 12 */
      "PIPE", "ALRM",  "TERM", "URG", "STOP", "TSTP",       /* 13 - 18 */
      "CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU",         /* 19 - 24 */
      "XFSZ", "VTALRM", "PROF", "WINCH", "29", "USR1",      /* 25 - 30 */
      "USR2", NULL,                                   /* 31 - 32 */
};

void
ktrpsig(struct ktr_psig *psig)
{
      if (psig->signo > 0 && psig->signo < NSIG)
            (void)printf("SIG%s ", signames[psig->signo]);
      else
            (void)printf("SIG %d ", psig->signo);
      if (psig->action == SIG_DFL)
            (void)printf("SIG_DFL\n");
      else {
            (void)printf("caught handler=0x%lx mask=0x%x code=0x%x\n",
                (u_long)psig->action, psig->mask.__bits[0], psig->code);
      }
}

void
ktrcsw(struct ktr_csw *cs)
{
      (void)printf("%s %s\n", cs->out ? "stop" : "resume",
            cs->user ? "user" : "kernel");
}

#define     UTRACE_DLOPEN_START           1
#define     UTRACE_DLOPEN_STOP            2
#define     UTRACE_DLCLOSE_START          3
#define     UTRACE_DLCLOSE_STOP           4
#define     UTRACE_LOAD_OBJECT            5
#define     UTRACE_UNLOAD_OBJECT          6
#define     UTRACE_ADD_RUNDEP       7
#define     UTRACE_PRELOAD_FINISHED       8
#define     UTRACE_INIT_CALL        9
#define     UTRACE_FINI_CALL        10

struct utrace_rtld {
      char sig[4];                        /* 'RTLD' */
      int event;
      void *handle;
      void *mapbase;
      size_t mapsize;
      int refcnt;
      char name[MAXPATHLEN];
};

void
ktruser_rtld(int len, unsigned char *p)
{
      struct utrace_rtld *ut = (struct utrace_rtld *)p;
      void *parent;
      int mode;

      switch (ut->event) {
      case UTRACE_DLOPEN_START:
            mode = ut->refcnt;
            printf("dlopen(%s, ", ut->name);
            switch (mode & RTLD_MODEMASK) {
            case RTLD_NOW:
                  printf("RTLD_NOW");
                  break;
            case RTLD_LAZY:
                  printf("RTLD_LAZY");
                  break;
            default:
                  printf("%#x", mode & RTLD_MODEMASK);
            }
            if (mode & RTLD_GLOBAL)
                  printf(" | RTLD_GLOBAL");
            if (mode & RTLD_TRACE)
                  printf(" | RTLD_TRACE");
            if (mode & ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE))
                  printf(" | %#x", mode &
                      ~(RTLD_MODEMASK | RTLD_GLOBAL | RTLD_TRACE));
            printf(")\n");
            break;
      case UTRACE_DLOPEN_STOP:
            printf("%p = dlopen(%s) ref %d\n", ut->handle, ut->name,
                ut->refcnt);
            break;
      case UTRACE_DLCLOSE_START:
            printf("dlclose(%p) (%s, %d)\n", ut->handle, ut->name,
                ut->refcnt);
            break;
      case UTRACE_DLCLOSE_STOP:
            printf("dlclose(%p) finished\n", ut->handle);
            break;
      case UTRACE_LOAD_OBJECT:
            printf("RTLD: loaded   %p @ %p - %p (%s)\n", ut->handle,
                ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1,
                ut->name);
            break;
      case UTRACE_UNLOAD_OBJECT:
            printf("RTLD: unloaded %p @ %p - %p (%s)\n", ut->handle,
                ut->mapbase, (char *)ut->mapbase + ut->mapsize - 1,
                ut->name);
            break;
      case UTRACE_ADD_RUNDEP:
            parent = ut->mapbase;
            printf("RTLD: %p now depends on %p (%s, %d)\n", parent,
                ut->handle, ut->name, ut->refcnt);
            break;
      case UTRACE_PRELOAD_FINISHED:
            printf("RTLD: LD_PRELOAD finished\n");
            break;
      case UTRACE_INIT_CALL:
            printf("RTLD: init %p for %p (%s)\n", ut->mapbase, ut->handle,
                ut->name);
            break;
      case UTRACE_FINI_CALL:
            printf("RTLD: fini %p for %p (%s)\n", ut->mapbase, ut->handle,
                ut->name);
            break;
      default:
            p += 4;
            len -= 4;
            printf("RTLD: %d ", len);
            while (len--)
                  if (decimal)
                        printf(" %d", *p++);
                  else
                        printf(" %02x", *p++);
            printf("\n");
      }
}

struct utrace_malloc {
      void *p;
      size_t s;
      void *r;
};

void
ktruser_malloc(int len, unsigned char *p)
{
      struct utrace_malloc *ut = (struct utrace_malloc *)p;

      if (ut->p == NULL) {
            if (ut->s == 0 && ut->r == NULL)
                  printf("malloc_init()\n");
            else
                  printf("%p = malloc(%zu)\n", ut->r, ut->s);
      } else {
            if (ut->s == 0)
                  printf("free(%p)\n", ut->p);
            else
                  printf("%p = realloc(%p, %zu)\n", ut->r, ut->p, ut->s);
      }
}

void
ktruser(int len, unsigned char *p)
{

      if (len >= 8 && bcmp(p, "RTLD", 4) == 0) {
            ktruser_rtld(len, p);
            return;
      }

      if (len == sizeof(struct utrace_malloc)) {
            ktruser_malloc(len, p);
            return;
      }

      (void)printf("%d ", len);
      while (len--)
            if (decimal)
                  (void)printf(" %d", *p++);
            else
                  (void)printf(" %02x", *p++);
      (void)printf("\n");
}

void
ktrsockaddr(struct sockaddr *sa)
{
/*
 TODO: Support additional address families
      #include <netnatm/natm.h>
      struct sockaddr_natm    *natm;
      #include <netsmb/netbios.h>
      struct sockaddr_nb      *nb;
*/
      char addr[64];

      /*
       * note: ktrstruct() has already verified that sa points to a
       * buffer at least sizeof(struct sockaddr) bytes long and exactly
       * sa->sa_len bytes long.
       */
      printf("struct sockaddr { ");
      sockfamilyname(sa->sa_family);
      printf(", ");

#define check_sockaddr_len(n)                         \
      if (sa_##n->s##n##_len < sizeof(struct sockaddr_##n)) {     \
            printf("invalid");                        \
            break;                                    \
      }

      switch(sa->sa_family) {
      case AF_INET: {
            struct sockaddr_in      *sa_in;

            sa_in = (struct sockaddr_in *)sa;
            check_sockaddr_len(in);
            inet_ntop(AF_INET, &sa_in->sin_addr, addr, sizeof addr);
            printf("%s:%u", addr, ntohs(sa_in->sin_port));
            break;
      }
#ifdef NETATALK
      case AF_APPLETALK: {
            struct sockaddr_at      *sa_at;
            struct netrange         *nr;

            sa_at = (struct sockaddr_at *)sa;
            check_sockaddr_len(at);
            nr = &sa_at->sat_range.r_netrange;
            printf("%d.%d, %d-%d, %d", ntohs(sa_at->sat_addr.s_net),
                  sa_at->sat_addr.s_node, ntohs(nr->nr_firstnet),
                  ntohs(nr->nr_lastnet), nr->nr_phase);
            break;
      }
#endif
      case AF_INET6: {
            struct sockaddr_in6     *sa_in6;

            sa_in6 = (struct sockaddr_in6 *)sa;
            check_sockaddr_len(in6);
            inet_ntop(AF_INET6, &sa_in6->sin6_addr, addr, sizeof addr);
            printf("[%s]:%u", addr, htons(sa_in6->sin6_port));
            break;
      }
#ifdef IPX
      case AF_IPX: {
            struct sockaddr_ipx     *sa_ipx;

            sa_ipx = (struct sockaddr_ipx *)sa;
            check_sockaddr_len(ipx);
            /* XXX wish we had ipx_ntop */
            printf("%s", ipx_ntoa(sa_ipx->sipx_addr));
            break;
      }
#endif
      case AF_UNIX: {
            struct sockaddr_un *sa_un;

            sa_un = (struct sockaddr_un *)sa;
            check_sockaddr_len(un);
            printf("%.*s", (int)sizeof(sa_un->sun_path), sa_un->sun_path);
            break;
      }
      default:
            printf("unknown address family");
      }
      printf(" }\n");
}

void
ktrstat(struct stat *statp)
{
      char mode[12], timestr[PATH_MAX + 4];
      struct passwd *pwd;
      struct group  *grp;
      struct tm *tm;

      /*
       * note: ktrstruct() has already verified that statp points to a
       * buffer exactly sizeof(struct stat) bytes long.
       */
      printf("struct stat {");
      strmode(statp->st_mode, mode);
      printf("dev=%ju, ino=%ju, mode=%s, nlink=%ju, ",
            (uintmax_t)statp->st_dev, (uintmax_t)statp->st_ino, mode,
            (uintmax_t)statp->st_nlink);
      if (resolv == 0 || (pwd = getpwuid(statp->st_uid)) == NULL)
            printf("uid=%ju, ", (uintmax_t)statp->st_uid);
      else
            printf("uid=\"%s\", ", pwd->pw_name);
      if (resolv == 0 || (grp = getgrgid(statp->st_gid)) == NULL)
            printf("gid=%ju, ", (uintmax_t)statp->st_gid);
      else
            printf("gid=\"%s\", ", grp->gr_name);
      printf("rdev=%ju, ", (uintmax_t)statp->st_rdev);
      printf("atime=");
      if (resolv == 0)
            printf("%ld", statp->st_atimespec.tv_sec);
      else {
            tm = localtime(&statp->st_atimespec.tv_sec);
            (void)strftime(timestr, sizeof(timestr), TIME_FORMAT, tm);
            printf("\"%s\"", timestr);
      }
      if (statp->st_atimespec.tv_nsec != 0)
            printf(".%09ld, ", statp->st_atimespec.tv_nsec);
      else
            printf(", ");
      printf("stime=");
      if (resolv == 0)
            printf("%ld", statp->st_mtimespec.tv_sec);
      else {
            tm = localtime(&statp->st_mtimespec.tv_sec);
            (void)strftime(timestr, sizeof(timestr), TIME_FORMAT, tm);
            printf("\"%s\"", timestr);
      }
      if (statp->st_mtimespec.tv_nsec != 0)
            printf(".%09ld, ", statp->st_mtimespec.tv_nsec);
      else
            printf(", ");
      printf("ctime=");
      if (resolv == 0)
            printf("%ld", statp->st_ctimespec.tv_sec);
      else {
            tm = localtime(&statp->st_ctimespec.tv_sec);
            (void)strftime(timestr, sizeof(timestr), TIME_FORMAT, tm);
            printf("\"%s\"", timestr);
      }
      if (statp->st_ctimespec.tv_nsec != 0)
            printf(".%09ld, ", statp->st_ctimespec.tv_nsec);
      else
            printf(", ");
      printf("birthtime=");
      if (resolv == 0)
            printf("%ld", statp->st_birthtimespec.tv_sec);
      else {
            tm = localtime(&statp->st_birthtimespec.tv_sec);
            (void)strftime(timestr, sizeof(timestr), TIME_FORMAT, tm);
            printf("\"%s\"", timestr);
      }
      if (statp->st_birthtimespec.tv_nsec != 0)
            printf(".%09ld, ", statp->st_birthtimespec.tv_nsec);
      else
            printf(", ");
      printf("size=%jd, blksize=%ju, blocks=%jd, flags=0x%x",
            (uintmax_t)statp->st_size, (uintmax_t)statp->st_blksize,
            (intmax_t)statp->st_blocks, statp->st_flags);
      printf(" }\n");
}

void
ktrstruct(char *buf, size_t buflen)
{
      char *name, *data;
      size_t namelen, datalen;
      int i;

      for (name = buf, namelen = 0;
           namelen < buflen && name[namelen] != '\0';
           ++namelen)
            /* nothing */;
      if (namelen == buflen)
            goto invalid;
      if (name[namelen] != '\0')
            goto invalid;
      data = buf + namelen + 1;
      datalen = buflen - namelen - 1;
      if (datalen == 0)
            goto invalid;
      /* sanity check */
      for (i = 0; i < namelen; ++i)
            if (!isalpha((unsigned char)name[i]))
                  goto invalid;
      if (strcmp(name, "stat") == 0) {
            if (datalen != sizeof(struct stat))
                  goto invalid;
            ktrstat((struct stat *)data);
      } else if (strcmp(name, "sockaddr") == 0) {
            if (datalen < sizeof(struct sockaddr) ||
                datalen != ((struct sockaddr *)(data))->sa_len)
                  goto invalid;
            ktrsockaddr((struct sockaddr *)data);
      } else {
            printf("unknown structure\n");
      }
      return;
invalid:
      printf("invalid record\n");
}

void
usage(void)
{
      fprintf(stderr, "usage: kdump [-dEnlHRrsT] [-f trfile] "
          "[-m maxdata] [-p pid] [-t [cnistuw]]\n");
      exit(1);
}

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