1 /* $OpenBSD: tee.c,v 1.8 2013/04/23 17:48:17 tedu 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 struct list { 46 struct list *next; 47 int fd; 48 char *name; 49 }; 50 struct list *head; 51 52 static void 53 add(int fd, char *name) 54 { 55 struct list *p; 56 57 if ((p = malloc(sizeof(*p))) == NULL) 58 err(1, NULL); 59 p->fd = fd; 60 p->name = name; 61 p->next = head; 62 head = p; 63 } 64 65 int 66 main(int argc, char *argv[]) 67 { 68 struct list *p; 69 int fd; 70 ssize_t n, rval, wval; 71 char *bp; 72 int append, ch, exitval; 73 char buf[8192]; 74 75 setlocale(LC_ALL, ""); 76 77 append = 0; 78 while ((ch = getopt(argc, argv, "ai")) != -1) { 79 switch(ch) { 80 case 'a': 81 append = 1; 82 break; 83 case 'i': 84 (void)signal(SIGINT, SIG_IGN); 85 break; 86 case '?': 87 default: 88 (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n"); 89 exit(1); 90 } 91 } 92 argv += optind; 93 argc -= optind; 94 95 add(STDOUT_FILENO, "stdout"); 96 97 exitval = 0; 98 while (*argv) { 99 if ((fd = open(*argv, O_WRONLY | O_CREAT | 100 (append ? O_APPEND : O_TRUNC), DEFFILEMODE)) == -1) { 101 warn("%s", *argv); 102 exitval = 1; 103 } else 104 add(fd, *argv); 105 argv++; 106 } 107 108 while ((rval = read(STDIN_FILENO, buf, sizeof(buf))) > 0) { 109 for (p = head; p; p = p->next) { 110 n = rval; 111 bp = buf; 112 do { 113 if ((wval = write(p->fd, bp, n)) == -1) { 114 warn("%s", p->name); 115 exitval = 1; 116 break; 117 } 118 bp += wval; 119 } while (n -= wval); 120 } 121 } 122 if (rval == -1) { 123 warn("read"); 124 exitval = 1; 125 } 126 127 for (p = head; p; p = p->next) { 128 if (close(p->fd) == -1) { 129 warn("%s", p->name); 130 exitval = 1; 131 } 132 } 133 134 exit(exitval); 135 } 136