1 /* $NetBSD: tee.c,v 1.12 2016/09/05 00:40:30 sevan Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1988, 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)tee.c 8.1 (Berkeley) 6/6/93"; 41 #endif 42 __RCSID("$NetBSD: tee.c,v 1.12 2016/09/05 00:40:30 sevan Exp $"); 43 #endif 44 45 #include <sys/types.h> 46 #include <sys/stat.h> 47 #include <signal.h> 48 #include <errno.h> 49 #include <fcntl.h> 50 #include <unistd.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <locale.h> 55 #include <err.h> 56 57 typedef struct _list { 58 struct _list *next; 59 int fd; 60 const char *name; 61 } LIST; 62 LIST *head; 63 64 void add(int, const char *); 65 66 int 67 main(int argc, char *argv[]) 68 { 69 LIST *p; 70 ssize_t rval; 71 int fd; 72 int append, ch, exitval; 73 char *buf; 74 #define BSIZE (8 * 1024) 75 76 setlocale(LC_ALL, ""); 77 78 append = 0; 79 while ((ch = getopt(argc, argv, "ai")) != -1) 80 switch((char)ch) { 81 case 'a': 82 append = 1; 83 break; 84 case 'i': 85 (void)signal(SIGINT, SIG_IGN); 86 break; 87 case '?': 88 default: 89 (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n"); 90 exit(1); 91 } 92 argv += optind; 93 argc -= optind; 94 95 if ((buf = malloc(BSIZE)) == NULL) 96 err(1, "malloc"); 97 98 add(STDOUT_FILENO, "stdout"); 99 100 for (exitval = 0; *argv; ++argv) 101 if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND : 102 O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0) { 103 warn("%s", *argv); 104 exitval = 1; 105 } else 106 add(fd, *argv); 107 108 while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0) 109 for (p = head; p; p = p->next) { 110 const char *bp = buf; 111 size_t n = rval; 112 ssize_t wval; 113 114 do { 115 if ((wval = write(p->fd, bp, n)) == -1) { 116 warn("%s", p->name); 117 exitval = 1; 118 break; 119 } 120 bp += wval; 121 } while (n -= wval); 122 } 123 if (rval < 0) { 124 warn("read"); 125 exitval = 1; 126 } 127 128 for (p = head; p; p = p->next) { 129 if (close(p->fd) == -1) { 130 warn("%s", p->name); 131 exitval = 1; 132 } 133 } 134 135 exit(exitval); 136 } 137 138 void 139 add(int fd, const char *name) 140 { 141 LIST *p; 142 143 if ((p = malloc(sizeof(LIST))) == NULL) 144 err(1, "malloc"); 145 p->fd = fd; 146 p->name = name; 147 p->next = head; 148 head = p; 149 } 150