2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 static const char copyright[] =
36 "@(#) Copyright (c) 1992, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
42 static char sccsid[] = "@(#)gcore.c 8.2 (Berkeley) 9/23/93";
45 #include <sys/cdefs.h>
46 __FBSDID("$FreeBSD$");
49 * Originally written by Eric Cooper in Fall 1981.
50 * Inspired by a version 6 program by Len Levin, 1978.
51 * Several pieces of code lifted from Bill Joy's 4BSD ps.
52 * Most recently, hacked beyond recognition for 4.4BSD by Steven McCanne,
53 * Lawrence Berkeley Laboratory.
55 * Portions of this software were developed by the Computer Systems
56 * Engineering group at Lawrence Berkeley Laboratory under DARPA
57 * contract BG 91-66 and contributed to Berkeley.
60 #include <sys/param.h>
63 #include <sys/linker_set.h>
64 #include <sys/sysctl.h>
76 static void killed(int);
77 static void usage(void) __dead2;
81 SET_DECLARE(dumpset, struct dumpers);
84 main(int argc, char *argv[])
86 int ch, efd, fd, name[4];
87 char *binfile, *corefile;
88 char passpath[MAXPATHLEN], fname[MAXPATHLEN];
89 struct dumpers **d, *dumper;
94 while ((ch = getopt(argc, argv, "c:fs")) != -1) {
100 pflags |= PFLAGS_FULL;
103 pflags |= PFLAGS_RESUME;
112 /* XXX we should check that the pid argument is really a number */
118 name[2] = KERN_PROC_PATHNAME;
120 len = sizeof(passpath);
121 if (sysctl(name, 4, passpath, &len, NULL, 0) == -1)
122 errx(1, "kern.proc.pathname failure");
132 efd = open(binfile, O_RDONLY, 0);
134 err(1, "%s", binfile);
136 SET_FOREACH(d, dumpset) {
137 lseek(efd, 0, SEEK_SET);
138 if (((*d)->ident)(efd, pid, binfile)) {
140 lseek(efd, 0, SEEK_SET);
145 errx(1, "Invalid executable file");
146 if (corefile == NULL) {
147 (void)snprintf(fname, sizeof(fname), "core.%d", pid);
150 fd = open(corefile, O_RDWR|O_CREAT|O_TRUNC, DEFFILEMODE);
152 err(1, "%s", corefile);
154 * The semantics of the 's' flag is to stop the target process.
155 * Previous versions of gcore would manage this by trapping SIGHUP,
156 * SIGINT and SIGTERM (to be passed to the target pid), and then
157 * signal the child to stop.
159 * However, this messes up if the selected dumper uses ptrace calls
160 * that leave the child already stopped. The waitpid call in elfcore
163 * The best thing to do here is to externalize the 's' flag and let
164 * each dumper dispose of what that means, if anything. For the elfcore
165 * dumper, the 's' flag is a no-op since the ptrace attach stops the
166 * process in question already.
169 dumper->dump(efd, fd, pid);
179 (void)fprintf(stderr, "usage: gcore [-s] [-c core] [executable] pid\n");