124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
/* $NetBSD: gcore.c,v 1.12 2019/02/01 08:29:04 mrg Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: gcore.c,v 1.12 2019/02/01 08:29:04 mrg Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/ptrace.h>
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#include <sys/proc.h>
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#include <sys/wait.h>
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#include <stdio.h>
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#include <string.h>
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#include <err.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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static void usage(void) __dead;
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static void
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usage(void)
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{
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(void)fprintf(stderr, "Usage: %s [-c <corename>] <pid> [<pid> ...]\n",
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getprogname());
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exit(1);
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}
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int
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main(int argc, char **argv)
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{
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int c;
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char *corename = NULL;
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int corelen = 0;
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while ((c = getopt(argc, argv, "c:")) != -1)
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switch (c) {
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case 'c':
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corename = optarg;
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corelen = strlen(corename);
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break;
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case '?':
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default:
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usage();
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/*NOTREACHED*/
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}
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if (optind == argc)
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usage();
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for (c = optind; c < argc; c++) {
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char *ep;
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u_long lval;
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int status, serrno;
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pid_t pid, cpid;
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errno = 0;
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lval = strtoul(argv[c], &ep, 0);
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if (argv[c] == NULL || *ep)
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errx(1, "`%s' is not a number.", argv[c]);
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if (errno == ERANGE && lval == ULONG_MAX)
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err(1, "Pid `%s'", argv[c]);
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pid = (pid_t)lval;
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if (ptrace(PT_ATTACH, pid, 0, 0) == -1)
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err(1, "ptrace(PT_ATTACH) to %lu failed", lval);
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if ((cpid = waitpid(pid, &status, 0)) != pid) {
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serrno = errno;
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(void)ptrace(PT_DETACH, pid, (void *)1, 0);
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errno = serrno;
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if (cpid == -1)
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err(1, "Cannot wait for %lu", lval);
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else
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errx(1, "Unexpected process %lu waited",
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(unsigned long)cpid);
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}
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if (ptrace(PT_DUMPCORE, pid, corename, corelen) == -1) {
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serrno = errno;
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(void)ptrace(PT_DETACH, pid, (void *)1, 0);
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errno = serrno;
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err(1, "ptrace(PT_DUMPCORE) to %lu failed", lval);
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}
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if (ptrace(PT_DETACH, pid, (void *)1, 0) == -1)
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err(1, "ptrace(PT_DETACH) to %lu failed", lval);
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}
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return 0;
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}
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