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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 static const char copyright[] =
32 "@(#) Copyright (c) 1992, 1993\n\
33 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)gcore.c 8.2 (Berkeley) 9/23/93";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
45 * Originally written by Eric Cooper in Fall 1981.
46 * Inspired by a version 6 program by Len Levin, 1978.
47 * Several pieces of code lifted from Bill Joy's 4BSD ps.
48 * Most recently, hacked beyond recognition for 4.4BSD by Steven McCanne,
49 * Lawrence Berkeley Laboratory.
51 * Portions of this software were developed by the Computer Systems
52 * Engineering group at Lawrence Berkeley Laboratory under DARPA
53 * contract BG 91-66 and contributed to Berkeley.
56 #include <sys/param.h>
59 #include <sys/linker_set.h>
60 #include <sys/sysctl.h>
72 static void killed(int);
73 static void usage(void) __dead2;
77 SET_DECLARE(dumpset, struct dumpers);
80 main(int argc, char *argv[])
82 int ch, efd, fd, name[4];
83 char *binfile, *corefile;
84 char passpath[MAXPATHLEN], fname[MAXPATHLEN];
85 struct dumpers **d, *dumper;
90 while ((ch = getopt(argc, argv, "c:fs")) != -1) {
96 pflags |= PFLAGS_FULL;
99 pflags |= PFLAGS_RESUME;
108 /* XXX we should check that the pid argument is really a number */
114 name[2] = KERN_PROC_PATHNAME;
116 len = sizeof(passpath);
117 if (sysctl(name, 4, passpath, &len, NULL, 0) == -1)
118 errx(1, "kern.proc.pathname failure");
128 efd = open(binfile, O_RDONLY, 0);
130 err(1, "%s", binfile);
132 SET_FOREACH(d, dumpset) {
133 lseek(efd, 0, SEEK_SET);
134 if (((*d)->ident)(efd, pid, binfile)) {
136 lseek(efd, 0, SEEK_SET);
141 errx(1, "Invalid executable file");
142 if (corefile == NULL) {
143 (void)snprintf(fname, sizeof(fname), "core.%d", pid);
146 fd = open(corefile, O_RDWR|O_CREAT|O_TRUNC, DEFFILEMODE);
148 err(1, "%s", corefile);
150 * The semantics of the 's' flag is to stop the target process.
151 * Previous versions of gcore would manage this by trapping SIGHUP,
152 * SIGINT and SIGTERM (to be passed to the target pid), and then
153 * signal the child to stop.
155 * However, this messes up if the selected dumper uses ptrace calls
156 * that leave the child already stopped. The waitpid call in elfcore
159 * The best thing to do here is to externalize the 's' flag and let
160 * each dumper dispose of what that means, if anything. For the elfcore
161 * dumper, the 's' flag is a no-op since the ptrace attach stops the
162 * process in question already.
165 dumper->dump(efd, fd, pid);
175 (void)fprintf(stderr, "usage: gcore [-s] [-c core] [executable] pid\n");