1 /* $NetBSD: gcore.c,v 1.9 2006/04/01 22:34:01 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __RCSID("$NetBSD: gcore.c,v 1.9 2006/04/01 22:34:01 christos Exp $"); 41 42 #include <sys/types.h> 43 #include <sys/param.h> 44 #include <sys/time.h> 45 #include <sys/ptrace.h> 46 #include <sys/proc.h> 47 #include <sys/wait.h> 48 49 #include <stdio.h> 50 #include <string.h> 51 #include <err.h> 52 #include <limits.h> 53 #include <stdlib.h> 54 #include <unistd.h> 55 #include <errno.h> 56 57 static void usage(void) __attribute__((__noreturn__)); 58 59 static void 60 usage(void) 61 { 62 (void)fprintf(stderr, "Usage: %s [-c <corename>] <pid> [<pid> ...]\n", 63 getprogname()); 64 exit(1); 65 } 66 67 68 int 69 main(int argc, char **argv) 70 { 71 int c; 72 char *corename = NULL; 73 int corelen = 0; 74 75 while ((c = getopt(argc, argv, "c:")) != -1) 76 switch (c) { 77 case 'c': 78 corename = optarg; 79 corelen = strlen(corename); 80 break; 81 case '?': 82 default: 83 usage(); 84 /*NOTREACHED*/ 85 } 86 87 if (optind == argc) 88 usage(); 89 90 for (c = optind; c < argc; c++) { 91 char *ep; 92 u_long lval; 93 int status, serrno; 94 pid_t pid, cpid; 95 96 errno = 0; 97 lval = strtoul(argv[c], &ep, 0); 98 if (argv[c] == '\0' || *ep) 99 errx(1, "`%s' is not a number.", argv[c]); 100 101 if (errno == ERANGE && lval == ULONG_MAX) 102 err(1, "Pid `%s'", argv[c]); 103 104 pid = (pid_t)lval; 105 106 if (ptrace(PT_ATTACH, pid, 0, 0) == -1) 107 err(1, "ptrace(PT_ATTACH) to %lu failed", lval); 108 109 if ((cpid = waitpid(pid, &status, 0)) != pid) { 110 serrno = errno; 111 (void)ptrace(PT_DETACH, pid, (void *)1, 0); 112 errno = serrno; 113 if (cpid == -1) 114 err(1, "Cannot wait for %lu", lval); 115 else 116 errx(1, "Unexpected process %lu waited", 117 (unsigned long)cpid); 118 } 119 120 if (ptrace(PT_DUMPCORE, pid, corename, corelen) == -1) { 121 serrno = errno; 122 (void)ptrace(PT_DETACH, pid, (void *)1, 0); 123 errno = serrno; 124 err(1, "ptrace(PT_DUMPCORE) to %lu failed", lval); 125 } 126 if (ptrace(PT_DETACH, pid, (void *)1, 0) == -1) 127 err(1, "ptrace(PT_DETACH) to %lu failed", lval); 128 } 129 return 0; 130 } 131