Annotation of src/usr.bin/ktrace/ktrace.c, Revision 1.4
1.4 ! millert 1: /* $OpenBSD: ktrace.c,v 1.3 1996/09/21 08:11:03 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: ktrace.c,v 1.4 1995/08/31 23:01:44 jtc Exp $ */
3:
4: /*-
5: * Copyright (c) 1988, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: static char copyright[] =
39: "@(#) Copyright (c) 1988, 1993\n\
40: The Regents of the University of California. All rights reserved.\n";
41: #endif /* not lint */
42:
43: #ifndef lint
44: #if 0
45: static char sccsid[] = "@(#)ktrace.c 8.2 (Berkeley) 4/28/95";
46: #endif
1.4 ! millert 47: static char *rcsid = "$OpenBSD: ktrace.c,v 1.3 1996/09/21 08:11:03 deraadt Exp $";
1.1 deraadt 48: #endif /* not lint */
49:
50: #include <sys/param.h>
51: #include <sys/stat.h>
52: #include <sys/file.h>
53: #include <sys/time.h>
54: #include <sys/errno.h>
55: #include <sys/uio.h>
56: #include <sys/ktrace.h>
57:
58: #include <err.h>
59: #include <stdio.h>
60: #include <unistd.h>
61:
62: #include "ktrace.h"
63:
64: void no_ktrace __P((int));
65: void usage __P((void));
66:
67: main(argc, argv)
68: int argc;
69: char **argv;
70: {
71: enum { NOTSET, CLEAR, CLEARALL } clear;
72: int append, ch, fd, inherit, ops, pid, pidset, trpoints;
73: char *tracefile;
1.3 deraadt 74: mode_t omask;
1.1 deraadt 75:
76: clear = NOTSET;
77: append = ops = pidset = inherit = 0;
78: trpoints = DEF_POINTS;
79: tracefile = DEF_TRACEFILE;
1.4 ! millert 80: while ((ch = getopt(argc,argv,"aCcdf:g:ip:t:")) != -1)
1.1 deraadt 81: switch((char)ch) {
82: case 'a':
83: append = 1;
84: break;
85: case 'C':
86: clear = CLEARALL;
87: pidset = 1;
88: break;
89: case 'c':
90: clear = CLEAR;
91: break;
92: case 'd':
93: ops |= KTRFLAG_DESCEND;
94: break;
95: case 'f':
96: tracefile = optarg;
97: break;
98: case 'g':
99: pid = -rpid(optarg);
100: pidset = 1;
101: break;
102: case 'i':
103: inherit = 1;
104: break;
105: case 'p':
106: pid = rpid(optarg);
107: pidset = 1;
108: break;
109: case 't':
110: trpoints = getpoints(optarg);
111: if (trpoints < 0) {
112: warnx("unknown facility in %s", optarg);
113: usage();
114: }
115: break;
116: default:
117: usage();
118: }
119: argv += optind;
120: argc -= optind;
121:
122: if (pidset && *argv || !pidset && !*argv)
123: usage();
124:
125: if (inherit)
126: trpoints |= KTRFAC_INHERIT;
127:
128: (void)signal(SIGSYS, no_ktrace);
129: if (clear != NOTSET) {
130: if (clear == CLEARALL) {
131: ops = KTROP_CLEAR | KTRFLAG_DESCEND;
132: trpoints = ALL_POINTS;
133: pid = 1;
134: } else
135: ops |= pid ? KTROP_CLEAR : KTROP_CLEARFILE;
136:
137: if (ktrace(tracefile, ops, trpoints, pid) < 0)
138: err(1, tracefile);
139: exit(0);
140: }
141:
1.3 deraadt 142: omask = umask(S_IRWXG|S_IRWXO);
1.1 deraadt 143: if ((fd = open(tracefile, O_CREAT | O_WRONLY | (append ? 0 : O_TRUNC),
144: DEFFILEMODE)) < 0)
145: err(1, tracefile);
1.3 deraadt 146: (void)umask(omask);
1.1 deraadt 147: (void)close(fd);
148:
149: if (*argv) {
150: if (ktrace(tracefile, ops, trpoints, getpid()) < 0)
151: err(1, tracefile);
152: execvp(argv[0], &argv[0]);
153: err(1, "exec of '%s' failed", argv[0]);
154: }
155: else if (ktrace(tracefile, ops, trpoints, pid) < 0)
156: err(1, tracefile);
157: exit(0);
158: }
159:
160: rpid(p)
161: char *p;
162: {
163: static int first;
164:
165: if (first++) {
166: warnx("only one -g or -p flag is permitted.");
167: usage();
168: }
169: if (!*p) {
170: warnx("illegal process id.");
171: usage();
172: }
173: return(atoi(p));
174: }
175:
176: void
177: usage()
178: {
179: (void)fprintf(stderr,
180: "usage:\tktrace [-aCcid] [-f trfile] [-g pgid] [-p pid] [-t [acgn]\n\tktrace [-aCcid] [-f trfile] [-t [acgn] command\n");
181: exit(1);
182: }
183:
184: void
185: no_ktrace(sig)
186: int sig;
187: {
188: (void)fprintf(stderr,
189: "error:\tktrace() system call not supported in the running kernel\n\tre-compile kernel with 'options KTRACE'\n");
190: exit(1);
191: }
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