Annotation of src/usr.bin/ktrace/ktrace.c, Revision 1.24
1.24 ! jmc 1: /* $OpenBSD: ktrace.c,v 1.23 2012/07/12 16:45:15 guenther 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.
1.16 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include <sys/param.h>
34: #include <sys/stat.h>
35: #include <sys/time.h>
36: #include <sys/uio.h>
37: #include <sys/ktrace.h>
38:
39: #include <err.h>
1.19 millert 40: #include <errno.h>
1.8 millert 41: #include <fcntl.h>
1.10 deraadt 42: #include <stdlib.h>
1.1 deraadt 43: #include <stdio.h>
1.14 deraadt 44: #include <string.h>
1.1 deraadt 45: #include <unistd.h>
46:
47: #include "ktrace.h"
1.11 espie 48: #include "extern.h"
1.1 deraadt 49:
1.13 millert 50: static int rpid(const char *);
51: static void no_ktrace(int);
52: static void usage(void);
1.1 deraadt 53:
1.10 deraadt 54: int
1.17 deraadt 55: main(int argc, char *argv[])
1.1 deraadt 56: {
57: enum { NOTSET, CLEAR, CLEARALL } clear;
1.10 deraadt 58: int append, ch, fd, inherit, ops, pidset, trpoints;
59: pid_t pid;
1.1 deraadt 60: char *tracefile;
1.3 deraadt 61: mode_t omask;
1.6 angelos 62: struct stat sb;
1.1 deraadt 63:
64: clear = NOTSET;
1.21 tedu 65: append = ops = pidset = inherit = pid = 0;
1.1 deraadt 66: trpoints = DEF_POINTS;
67: tracefile = DEF_TRACEFILE;
1.23 guenther 68: while ((ch = getopt(argc,argv,"aBCcdf:g:ip:t:")) != -1)
1.1 deraadt 69: switch((char)ch) {
70: case 'a':
71: append = 1;
1.23 guenther 72: break;
73: case 'B':
74: putenv("LD_BIND_NOW=");
1.1 deraadt 75: break;
76: case 'C':
77: clear = CLEARALL;
78: pidset = 1;
79: break;
80: case 'c':
81: clear = CLEAR;
82: break;
83: case 'd':
84: ops |= KTRFLAG_DESCEND;
85: break;
86: case 'f':
87: tracefile = optarg;
88: break;
89: case 'g':
90: pid = -rpid(optarg);
91: pidset = 1;
92: break;
93: case 'i':
94: inherit = 1;
95: break;
96: case 'p':
97: pid = rpid(optarg);
98: pidset = 1;
99: break;
100: case 't':
101: trpoints = getpoints(optarg);
102: if (trpoints < 0) {
103: warnx("unknown facility in %s", optarg);
104: usage();
105: }
106: break;
107: default:
108: usage();
109: }
110: argv += optind;
111: argc -= optind;
112:
1.15 deraadt 113: if ((pidset && *argv) || (!pidset && !*argv && clear != CLEAR))
1.1 deraadt 114: usage();
115:
116: if (inherit)
117: trpoints |= KTRFAC_INHERIT;
118:
119: (void)signal(SIGSYS, no_ktrace);
120: if (clear != NOTSET) {
121: if (clear == CLEARALL) {
122: ops = KTROP_CLEAR | KTRFLAG_DESCEND;
123: trpoints = ALL_POINTS;
124: pid = 1;
125: } else
126: ops |= pid ? KTROP_CLEAR : KTROP_CLEARFILE;
127:
128: if (ktrace(tracefile, ops, trpoints, pid) < 0)
1.9 millert 129: err(1, "%s", tracefile);
1.1 deraadt 130: exit(0);
131: }
132:
1.3 deraadt 133: omask = umask(S_IRWXG|S_IRWXO);
1.5 deraadt 134: if (append) {
135: if ((fd = open(tracefile, O_CREAT | O_WRONLY, DEFFILEMODE)) < 0)
1.9 millert 136: err(1, "%s", tracefile);
1.5 deraadt 137: if (fstat(fd, &sb) != 0 || sb.st_uid != getuid())
138: errx(1, "Refuse to append to %s: not owned by you.",
139: tracefile);
140: } else {
141: if (unlink(tracefile) == -1 && errno != ENOENT)
142: err(1, "unlink %s", tracefile);
143: if ((fd = open(tracefile, O_CREAT | O_EXCL | O_WRONLY,
144: DEFFILEMODE)) < 0)
1.9 millert 145: err(1, "%s", tracefile);
1.5 deraadt 146: }
1.3 deraadt 147: (void)umask(omask);
1.1 deraadt 148: (void)close(fd);
149:
150: if (*argv) {
151: if (ktrace(tracefile, ops, trpoints, getpid()) < 0)
1.9 millert 152: err(1, "%s", tracefile);
1.1 deraadt 153: execvp(argv[0], &argv[0]);
154: err(1, "exec of '%s' failed", argv[0]);
155: }
156: else if (ktrace(tracefile, ops, trpoints, pid) < 0)
1.9 millert 157: err(1, "%s", tracefile);
1.1 deraadt 158: exit(0);
159: }
160:
1.11 espie 161: static int
1.17 deraadt 162: rpid(const char *p)
1.1 deraadt 163: {
164: static int first;
165:
166: if (first++) {
167: warnx("only one -g or -p flag is permitted.");
168: usage();
169: }
170: if (!*p) {
171: warnx("illegal process id.");
172: usage();
173: }
174: return(atoi(p));
175: }
176:
1.11 espie 177: static void
1.17 deraadt 178: usage(void)
1.1 deraadt 179: {
180: (void)fprintf(stderr,
1.24 ! jmc 181: "usage: ktrace [-aBCcdi] [-f trfile] [-g pgid] [-p pid] [-t trstr]\n"
1.20 jmc 182: " ktrace [-adi] [-f trfile] [-t trstr] command\n");
1.1 deraadt 183: exit(1);
184: }
185:
1.18 deraadt 186: /* ARGSUSED */
1.11 espie 187: static void
1.17 deraadt 188: no_ktrace(int signo)
1.1 deraadt 189: {
1.12 deraadt 190: char buf[8192];
191:
192: snprintf(buf, sizeof(buf),
1.15 deraadt 193: "error:\tktrace() system call not supported in the running kernel\n\tre-compile kernel with 'option KTRACE'\n");
1.12 deraadt 194: write(STDERR_FILENO, buf, strlen(buf));
195: _exit(1);
1.1 deraadt 196: }
![[BACK]](/icons/back.gif){kind=icon}
Return to ktrace.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ktrace