1 /*- 2 * Copyright (c) 2004-2009, Jilles Tjoelker 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with 6 * or without modification, are permitted provided that the 7 * following conditions are met: 8 * 9 * 1. Redistributions of source code must retain the above 10 * copyright notice, this list of conditions and the 11 * following disclaimer. 12 * 2. Redistributions in binary form must reproduce the 13 * above copyright notice, this list of conditions and 14 * the following disclaimer in the documentation and/or 15 * other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 18 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED 19 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 21 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 22 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY 23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 26 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 27 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 30 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 31 * OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/types.h> 38 #include <sys/event.h> 39 #include <sys/time.h> 40 #include <sys/wait.h> 41 42 #include <err.h> 43 #include <errno.h> 44 #include <fcntl.h> 45 #include <signal.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <sysexits.h> 50 #include <unistd.h> 51 52 static void 53 usage(void) 54 { 55 56 fprintf(stderr, "usage: pwait [-v] pid ...\n"); 57 exit(EX_USAGE); 58 } 59 60 /* 61 * pwait - wait for processes to terminate 62 */ 63 int 64 main(int argc, char *argv[]) 65 { 66 int kq; 67 struct kevent *e; 68 int verbose = 0; 69 int opt, nleft, n, i, duplicate, status; 70 long pid; 71 char *s, *end; 72 73 while ((opt = getopt(argc, argv, "v")) != -1) { 74 switch (opt) { 75 case 'v': 76 verbose = 1; 77 break; 78 default: 79 usage(); 80 /* NOTREACHED */ 81 } 82 } 83 84 argc -= optind; 85 argv += optind; 86 87 if (argc == 0) 88 usage(); 89 90 kq = kqueue(); 91 if (kq == -1) 92 err(1, "kqueue"); 93 94 e = malloc(argc * sizeof(struct kevent)); 95 if (e == NULL) 96 err(1, "malloc"); 97 nleft = 0; 98 for (n = 0; n < argc; n++) { 99 s = argv[n]; 100 if (!strncmp(s, "/proc/", 6)) /* Undocumented Solaris compat */ 101 s += 6; 102 errno = 0; 103 pid = strtol(s, &end, 10); 104 if (pid < 0 || *end != '\0' || errno != 0) { 105 warnx("%s: bad process id", s); 106 continue; 107 } 108 duplicate = 0; 109 for (i = 0; i < nleft; i++) 110 if (e[i].ident == (uintptr_t)pid) 111 duplicate = 1; 112 if (!duplicate) { 113 EV_SET(e + nleft, pid, EVFILT_PROC, EV_ADD, NOTE_EXIT, 114 0, NULL); 115 if (kevent(kq, e + nleft, 1, NULL, 0, NULL) == -1) 116 warn("%ld", pid); 117 else 118 nleft++; 119 } 120 } 121 122 while (nleft > 0) { 123 n = kevent(kq, NULL, 0, e, nleft, NULL); 124 if (n == -1) 125 err(1, "kevent"); 126 if (verbose) 127 for (i = 0; i < n; i++) { 128 status = e[i].data; 129 if (WIFEXITED(status)) 130 printf("%ld: exited with status %d.\n", 131 (long)e[i].ident, 132 WEXITSTATUS(status)); 133 else if (WIFSIGNALED(status)) 134 printf("%ld: killed by signal %d.\n", 135 (long)e[i].ident, 136 WTERMSIG(status)); 137 else 138 printf("%ld: terminated.\n", 139 (long)e[i].ident); 140 } 141 nleft -= n; 142 } 143 144 exit(EX_OK); 145 } 146