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/* $OpenBSD: ktrace.c,v 1.17 2003/06/10 22:20:47 deraadt Exp $ */
/* $NetBSD: ktrace.c,v 1.4 1995/08/31 23:01:44 jtc Exp $ */
/*-
* 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. 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
#if 0
static char sccsid[] = "@(#)ktrace.c 8.2 (Berkeley) 4/28/95";
#endif
static char *rcsid = "$OpenBSD: ktrace.c,v 1.17 2003/06/10 22:20:47 deraadt Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/errno.h>
#include <sys/uio.h>
#include <sys/ktrace.h>
#include <err.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "ktrace.h"
#include "extern.h"
static int rpid(const char *);
static void no_ktrace(int);
static void usage(void);
int
main(int argc, char *argv[])
{
enum { NOTSET, CLEAR, CLEARALL } clear;
int append, ch, fd, inherit, ops, pidset, trpoints;
pid_t pid;
char *tracefile;
mode_t omask;
struct stat sb;
clear = NOTSET;
append = ops = pidset = inherit = 0;
trpoints = DEF_POINTS;
tracefile = DEF_TRACEFILE;
while ((ch = getopt(argc,argv,"aCcdf:g:ip:t:")) != -1)
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 && clear != CLEAR))
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, "%s", tracefile);
exit(0);
}
omask = umask(S_IRWXG|S_IRWXO);
if (append) {
if ((fd = open(tracefile, O_CREAT | O_WRONLY, DEFFILEMODE)) < 0)
err(1, "%s", tracefile);
if (fstat(fd, &sb) != 0 || sb.st_uid != getuid())
errx(1, "Refuse to append to %s: not owned by you.",
tracefile);
} else {
if (unlink(tracefile) == -1 && errno != ENOENT)
err(1, "unlink %s", tracefile);
if ((fd = open(tracefile, O_CREAT | O_EXCL | O_WRONLY,
DEFFILEMODE)) < 0)
err(1, "%s", tracefile);
}
(void)umask(omask);
(void)close(fd);
if (*argv) {
if (ktrace(tracefile, ops, trpoints, getpid()) < 0)
err(1, "%s", tracefile);
execvp(argv[0], &argv[0]);
err(1, "exec of '%s' failed", argv[0]);
}
else if (ktrace(tracefile, ops, trpoints, pid) < 0)
err(1, "%s", tracefile);
exit(0);
}
static int
rpid(const 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));
}
static void
usage(void)
{
(void)fprintf(stderr,
"usage:\tktrace [-aCcdi] [-f trfile] [-g pgid] [-p pid] [-t [ceinsw]]\n\tktrace [-adi] [-f trfile] [-t [ceinsw]] command\n");
exit(1);
}
static void
no_ktrace(int signo)
{
char buf[8192];
snprintf(buf, sizeof(buf),
"error:\tktrace() system call not supported in the running kernel\n\tre-compile kernel with 'option KTRACE'\n");
write(STDERR_FILENO, buf, strlen(buf));
_exit(1);
}
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