BSD 4_4_Lite2 release

[unix-history] / usr / src / usr.bin / ktrace / ktrace.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 char copyright[] =
"@(#) Copyright (c) 1988, 1993\n\
       The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)ktrace.c    8.2 (Berkeley) 4/28/95";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/errno.h>
#include <sys/uio.h>
#include <sys/ktrace.h>

#include <err.h>
#include <stdio.h>
#include <unistd.h>

#include "ktrace.h"

void no_ktrace __P((int));
void usage __P((void));

main(argc, argv)
       int argc;
       char **argv;
{
       enum { NOTSET, CLEAR, CLEARALL } clear;
       int append, ch, fd, inherit, ops, pid, pidset, trpoints;
       char *tracefile;

       clear = NOTSET;
       append = ops = pidset = inherit = 0;
       trpoints = DEF_POINTS;
       tracefile = DEF_TRACEFILE;
       while ((ch = getopt(argc,argv,"aCcdf:g:ip:t:")) != EOF)
               switch((char)ch) {
               case 'a':
                       append = 1;
                       break;
               case 'C':
                       clear = CLEARALL;
                       pidset = 1;
                       break;
               case 'c':
                       clear = CLEAR;
                       break;
               case 'd':
                       ops |= KTRFLAG_DESCEND;
                       break;
               case 'f':
                       tracefile = optarg;
                       break;
               case 'g':
                       pid = -rpid(optarg);
                       pidset = 1;
                       break;
               case 'i':
                       inherit = 1;
                       break;
               case 'p':
                       pid = rpid(optarg);
                       pidset = 1;
                       break;
               case 't':
                       trpoints = getpoints(optarg);
                       if (trpoints < 0) {
                               warnx("unknown facility in %s", optarg);
                               usage();
                       }
                       break;
               default:
                       usage();
               }
       argv += optind;
       argc -= optind;
       
       if (pidset && *argv || !pidset && !*argv)
               usage();
                       
       if (inherit)
               trpoints |= KTRFAC_INHERIT;

       (void)signal(SIGSYS, no_ktrace);
       if (clear != NOTSET) {
               if (clear == CLEARALL) {
                       ops = KTROP_CLEAR | KTRFLAG_DESCEND;
                       trpoints = ALL_POINTS;
                       pid = 1;
               } else
                       ops |= pid ? KTROP_CLEAR : KTROP_CLEARFILE;

               if (ktrace(tracefile, ops, trpoints, pid) < 0)
                       err(1, tracefile);
               exit(0);
       }

       if ((fd = open(tracefile, O_CREAT | O_WRONLY | (append ? 0 : O_TRUNC),
           DEFFILEMODE)) < 0)
               err(1, tracefile);
       (void)close(fd);

       if (*argv) { 
               if (ktrace(tracefile, ops, trpoints, getpid()) < 0)
                       err(1, tracefile);
               execvp(argv[0], &argv[0]);
               err(1, "exec of '%s' failed", argv[0]);
       }
       else if (ktrace(tracefile, ops, trpoints, pid) < 0)
               err(1, tracefile);
       exit(0);
}

rpid(p)
       char *p;
{
       static int first;

       if (first++) {
               warnx("only one -g or -p flag is permitted.");
               usage();
       }
       if (!*p) {
               warnx("illegal process id.");
               usage();
       }
       return(atoi(p));
}

void
usage()
{
       (void)fprintf(stderr,
"usage:\tktrace [-aCcid] [-f trfile] [-g pgid] [-p pid] [-t [acgn]\n\tktrace [-aCcid] [-f trfile] [-t [acgn] command\n");
       exit(1);
}

void
no_ktrace(sig)
       int sig;
{
       (void)fprintf(stderr,
"error:\tktrace() system call not supported in the running kernel\n\tre-compile kernel with 'options KTRACE'\n");
       exit(1);
}