1 /* $OpenBSD: tee.c,v 1.6 2003/06/10 22:20:53 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 #ifndef lint 34 static char copyright[] = 35 "@(#) Copyright (c) 1988, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 #if 0 41 static char sccsid[] = "@(#)tee.c 8.1 (Berkeley) 6/6/93"; 42 #endif 43 static char rcsid[] = "$OpenBSD: tee.c,v 1.6 2003/06/10 22:20:53 deraadt Exp $"; 44 #endif 45 46 #include <sys/types.h> 47 #include <sys/stat.h> 48 #include <signal.h> 49 #include <errno.h> 50 #include <fcntl.h> 51 #include <unistd.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <locale.h> 56 #include <err.h> 57 58 typedef struct _list { 59 struct _list *next; 60 int fd; 61 char *name; 62 } LIST; 63 LIST *head; 64 65 void add(int, char *); 66 67 int 68 main(int argc, char *argv[]) 69 { 70 LIST *p; 71 int n, fd, rval, wval; 72 char *bp; 73 int append, ch, exitval; 74 char *buf; 75 #define BSIZE (8 * 1024) 76 77 setlocale(LC_ALL, ""); 78 79 append = 0; 80 while ((ch = getopt(argc, argv, "ai")) != -1) 81 switch((char)ch) { 82 case 'a': 83 append = 1; 84 break; 85 case 'i': 86 (void)signal(SIGINT, SIG_IGN); 87 break; 88 case '?': 89 default: 90 (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n"); 91 exit(1); 92 } 93 argv += optind; 94 argc -= optind; 95 96 if ((buf = malloc((size_t)BSIZE)) == NULL) 97 err(1, NULL); 98 99 add(STDOUT_FILENO, "stdout"); 100 101 for (exitval = 0; *argv; ++argv) 102 if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND : 103 O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0) { 104 warn("%s", *argv); 105 exitval = 1; 106 } else 107 add(fd, *argv); 108 109 while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0) 110 for (p = head; p; p = p->next) { 111 n = rval; 112 bp = buf; 113 do { 114 if ((wval = write(p->fd, bp, n)) == -1) { 115 warn("%s", p->name); 116 exitval = 1; 117 break; 118 } 119 bp += wval; 120 } while (n -= wval); 121 } 122 if (rval < 0) { 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 } 136 137 void 138 add(int fd, char *name) 139 { 140 LIST *p; 141 142 if ((p = malloc((size_t)sizeof(LIST))) == NULL) 143 err(1, NULL); 144 p->fd = fd; 145 p->name = name; 146 p->next = head; 147 head = p; 148 } 149