Annotation of src/usr.bin/ktrace/ktrace.c, Revision 1.37
1.37 ! tedu 1: /* $OpenBSD: ktrace.c,v 1.36 2019/06/28 13:35:01 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.
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:
1.31 deraadt 33: #include <sys/param.h> /* MAXCOMLEN */
34: #include <sys/signal.h>
1.1 deraadt 35: #include <sys/stat.h>
36: #include <sys/time.h>
37: #include <sys/uio.h>
38: #include <sys/ktrace.h>
39:
40: #include <err.h>
1.19 millert 41: #include <errno.h>
1.8 millert 42: #include <fcntl.h>
1.10 deraadt 43: #include <stdlib.h>
1.1 deraadt 44: #include <stdio.h>
1.14 deraadt 45: #include <string.h>
1.1 deraadt 46: #include <unistd.h>
47:
48: #include "ktrace.h"
1.11 espie 49: #include "extern.h"
1.1 deraadt 50:
1.25 miod 51: extern char *__progname;
52:
1.13 millert 53: static int rpid(const char *);
54: static void no_ktrace(int);
55: static void usage(void);
1.1 deraadt 56:
1.25 miod 57: int is_ltrace;
58:
1.10 deraadt 59: int
1.17 deraadt 60: main(int argc, char *argv[])
1.1 deraadt 61: {
62: enum { NOTSET, CLEAR, CLEARALL } clear;
1.10 deraadt 63: int append, ch, fd, inherit, ops, pidset, trpoints;
64: pid_t pid;
1.25 miod 65: char *tracefile, *tracespec;
1.3 deraadt 66: mode_t omask;
1.6 angelos 67: struct stat sb;
1.1 deraadt 68:
1.25 miod 69: is_ltrace = strcmp(__progname, "ltrace") == 0;
70:
1.1 deraadt 71: clear = NOTSET;
1.21 tedu 72: append = ops = pidset = inherit = pid = 0;
1.25 miod 73: trpoints = is_ltrace ? KTRFAC_USER : DEF_POINTS;
1.1 deraadt 74: tracefile = DEF_TRACEFILE;
1.25 miod 75: tracespec = NULL;
76:
77: if (is_ltrace) {
1.28 miod 78: while ((ch = getopt(argc, argv, "af:it:u:")) != -1)
1.25 miod 79: switch ((char)ch) {
80: case 'a':
81: append = 1;
82: break;
83: case 'f':
84: tracefile = optarg;
85: break;
86: case 'i':
87: inherit = 1;
1.28 miod 88: break;
89: case 't':
1.33 guenther 90: trpoints = getpoints(optarg, KTRFAC_USER);
1.28 miod 91: if (trpoints < 0) {
92: warnx("unknown facility in %s", optarg);
93: usage();
94: }
1.25 miod 95: break;
96: case 'u':
97: tracespec = optarg;
98: break;
99: default:
100: usage();
101: }
102: } else {
1.37 ! tedu 103: while ((ch = getopt(argc, argv, "aBCcdf:g:ip:t:T")) != -1)
1.25 miod 104: switch ((char)ch) {
105: case 'a':
106: append = 1;
107: break;
108: case 'B':
109: putenv("LD_BIND_NOW=");
110: break;
111: case 'C':
112: clear = CLEARALL;
1.35 tedu 113: tracefile = NULL;
1.25 miod 114: pidset = 1;
115: break;
116: case 'c':
117: clear = CLEAR;
118: break;
119: case 'd':
120: ops |= KTRFLAG_DESCEND;
121: break;
122: case 'f':
123: tracefile = optarg;
124: break;
125: case 'g':
126: pid = -rpid(optarg);
127: pidset = 1;
128: break;
129: case 'i':
130: inherit = 1;
131: break;
132: case 'p':
133: pid = rpid(optarg);
134: pidset = 1;
135: break;
136: case 't':
1.33 guenther 137: trpoints = getpoints(optarg, DEF_POINTS);
1.25 miod 138: if (trpoints < 0) {
139: warnx("unknown facility in %s", optarg);
140: usage();
141: }
142: break;
1.37 ! tedu 143: case 'T':
! 144: putenv("LIBC_NOUSERTC=");
! 145: break;
1.25 miod 146: default:
1.1 deraadt 147: usage();
148: }
1.25 miod 149: }
150:
1.1 deraadt 151: argv += optind;
152: argc -= optind;
153:
1.15 deraadt 154: if ((pidset && *argv) || (!pidset && !*argv && clear != CLEAR))
1.1 deraadt 155: usage();
1.25 miod 156:
1.1 deraadt 157: if (inherit)
158: trpoints |= KTRFAC_INHERIT;
159:
160: (void)signal(SIGSYS, no_ktrace);
161: if (clear != NOTSET) {
162: if (clear == CLEARALL) {
163: ops = KTROP_CLEAR | KTRFLAG_DESCEND;
164: trpoints = ALL_POINTS;
165: pid = 1;
166: } else
167: ops |= pid ? KTROP_CLEAR : KTROP_CLEARFILE;
168:
1.36 deraadt 169: if (ktrace(tracefile, ops, trpoints, pid) == -1) {
1.30 deraadt 170: if (errno == ESRCH)
171: err(1, "%d", pid);
1.9 millert 172: err(1, "%s", tracefile);
1.30 deraadt 173: }
1.1 deraadt 174: exit(0);
175: }
176:
1.3 deraadt 177: omask = umask(S_IRWXG|S_IRWXO);
1.5 deraadt 178: if (append) {
1.36 deraadt 179: if ((fd = open(tracefile, O_CREAT | O_WRONLY, DEFFILEMODE)) == -1)
1.9 millert 180: err(1, "%s", tracefile);
1.5 deraadt 181: if (fstat(fd, &sb) != 0 || sb.st_uid != getuid())
182: errx(1, "Refuse to append to %s: not owned by you.",
183: tracefile);
184: } else {
185: if (unlink(tracefile) == -1 && errno != ENOENT)
186: err(1, "unlink %s", tracefile);
187: if ((fd = open(tracefile, O_CREAT | O_EXCL | O_WRONLY,
1.36 deraadt 188: DEFFILEMODE)) == -1)
1.9 millert 189: err(1, "%s", tracefile);
1.5 deraadt 190: }
1.3 deraadt 191: (void)umask(omask);
1.1 deraadt 192: (void)close(fd);
193:
194: if (*argv) {
1.25 miod 195: if (is_ltrace) {
196: if (setenv("LD_TRACE_PLT", inherit ? "i" : "", 1) < 0)
197: err(1, "setenv(LD_TRACE_PLT)");
198: if (tracespec &&
199: setenv("LD_TRACE_PLTSPEC", tracespec, 1) < 0)
200: err(1, "setenv(LD_TRACE_PLTSPEC)");
201: }
1.36 deraadt 202: if (ktrace(tracefile, ops, trpoints, getpid()) == -1)
1.9 millert 203: err(1, "%s", tracefile);
1.1 deraadt 204: execvp(argv[0], &argv[0]);
205: err(1, "exec of '%s' failed", argv[0]);
206: }
1.36 deraadt 207: else if (ktrace(tracefile, ops, trpoints, pid) == -1) {
1.30 deraadt 208: if (errno == ESRCH)
209: err(1, "%d", pid);
1.9 millert 210: err(1, "%s", tracefile);
1.30 deraadt 211: }
1.1 deraadt 212: exit(0);
213: }
214:
1.11 espie 215: static int
1.17 deraadt 216: rpid(const char *p)
1.1 deraadt 217: {
1.32 deraadt 218: const char *errstr;
1.1 deraadt 219: static int first;
1.32 deraadt 220: pid_t pid;
1.1 deraadt 221:
222: if (first++) {
223: warnx("only one -g or -p flag is permitted.");
224: usage();
225: }
226: if (!*p) {
227: warnx("illegal process id.");
228: usage();
229: }
1.32 deraadt 230: pid = strtonum(p, 1, INT_MAX, &errstr);
231: if (errstr) {
232: warnx("illegal process id: %s", errstr);
233: usage();
234: }
235: return pid;
1.1 deraadt 236: }
237:
1.11 espie 238: static void
1.17 deraadt 239: usage(void)
1.1 deraadt 240: {
1.25 miod 241: if (is_ltrace)
1.29 jmc 242: fprintf(stderr, "usage: %s [-ai] [-f trfile] [-t trstr]"
243: " [-u trspec] command\n",
1.25 miod 244: __progname);
245: else
1.37 ! tedu 246: fprintf(stderr, "usage: %s [-aCcdi] [-f trfile] [-g pgid]"
1.25 miod 247: " [-p pid] [-t trstr]\n"
1.37 ! tedu 248: " %s [-aBdiT] [-f trfile] [-t trstr] command\n",
1.25 miod 249: __progname, __progname);
1.1 deraadt 250: exit(1);
251: }
252:
1.18 deraadt 253: /* ARGSUSED */
1.11 espie 254: static void
1.17 deraadt 255: no_ktrace(int signo)
1.1 deraadt 256: {
1.34 awolk 257: dprintf(STDERR_FILENO,
1.15 deraadt 258: "error:\tktrace() system call not supported in the running kernel\n\tre-compile kernel with 'option KTRACE'\n");
1.12 deraadt 259: _exit(1);
1.1 deraadt 260: }
![[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