1 /* $OpenBSD: tee.c,v 1.7 2009/10/27 23:59:44 deraadt Exp $ */ 2 /* $NetBSD: tee.c,v 1.5 1994/12/09 01:43:39 jtc Exp $ */ 3 4 /* 5 * Copyright (c) 1988, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/types.h> 34 #include <sys/stat.h> 35 #include <signal.h> 36 #include <errno.h> 37 #include <fcntl.h> 38 #include <unistd.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <locale.h> 43 #include <err.h> 44 45 typedef struct _list { 46 struct _list *next; 47 int fd; 48 char *name; 49 } LIST; 50 LIST *head; 51 52 void add(int, char *); 53 54 int 55 main(int argc, char *argv[]) 56 { 57 LIST *p; 58 int n, fd, rval, wval; 59 char *bp; 60 int append, ch, exitval; 61 char *buf; 62 #define BSIZE (8 * 1024) 63 64 setlocale(LC_ALL, ""); 65 66 append = 0; 67 while ((ch = getopt(argc, argv, "ai")) != -1) 68 switch((char)ch) { 69 case 'a': 70 append = 1; 71 break; 72 case 'i': 73 (void)signal(SIGINT, SIG_IGN); 74 break; 75 case '?': 76 default: 77 (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n"); 78 exit(1); 79 } 80 argv += optind; 81 argc -= optind; 82 83 if ((buf = malloc((size_t)BSIZE)) == NULL) 84 err(1, NULL); 85 86 add(STDOUT_FILENO, "stdout"); 87 88 for (exitval = 0; *argv; ++argv) 89 if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND : 90 O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0) { 91 warn("%s", *argv); 92 exitval = 1; 93 } else 94 add(fd, *argv); 95 96 while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0) 97 for (p = head; p; p = p->next) { 98 n = rval; 99 bp = buf; 100 do { 101 if ((wval = write(p->fd, bp, n)) == -1) { 102 warn("%s", p->name); 103 exitval = 1; 104 break; 105 } 106 bp += wval; 107 } while (n -= wval); 108 } 109 if (rval < 0) { 110 warn("read"); 111 exitval = 1; 112 } 113 114 for (p = head; p; p = p->next) { 115 if (close(p->fd) == -1) { 116 warn("%s", p->name); 117 exitval = 1; 118 } 119 } 120 121 exit(exitval); 122 } 123 124 void 125 add(int fd, char *name) 126 { 127 LIST *p; 128 129 if ((p = malloc((size_t)sizeof(LIST))) == NULL) 130 err(1, NULL); 131 p->fd = fd; 132 p->name = name; 133 p->next = head; 134 head = p; 135 } 136