1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1988, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)tee.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/tee/tee.c,v 1.4 1999/08/28 01:06:21 peter Exp $ 36 * $DragonFly: src/usr.bin/tee/tee.c,v 1.5 2005/02/18 16:33:53 liamfoy Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/queue.h> 41 #include <sys/stat.h> 42 43 #include <err.h> 44 #include <fcntl.h> 45 #include <signal.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <unistd.h> 49 50 struct desc_list { 51 SLIST_ENTRY(desc_list) link; 52 int fd; 53 const char *name; 54 }; 55 SLIST_HEAD(, desc_list) desc_head; 56 57 static void add(int, const char *); 58 static void usage(void); 59 60 int 61 main(int argc, char **argv) 62 { 63 struct desc_list *p; 64 int n, fd, rval, wval, flags; 65 char *bp, *buf; 66 int append, ch, exitval; 67 #define BSIZE (8 * 1024) 68 69 append = 0; 70 while ((ch = getopt(argc, argv, "ai")) != -1) 71 switch(ch) { 72 case 'a': 73 append = 1; 74 break; 75 case 'i': 76 if (signal(SIGINT, SIG_IGN) == SIG_ERR) 77 err(1, "signal"); 78 break; 79 default: 80 usage(); 81 } 82 argv += optind; 83 argc -= optind; 84 85 if ((buf = malloc(BSIZE)) == NULL) 86 err(1, "malloc failed"); 87 88 add(STDOUT_FILENO, "stdout"); 89 90 if (append) 91 flags = O_WRONLY|O_CREAT|O_APPEND; 92 else 93 flags = O_WRONLY|O_CREAT|O_TRUNC; 94 95 for (exitval = 0; *argv != NULL; ++argv) { 96 if ((fd = open(*argv, flags, DEFFILEMODE)) < 0) { 97 warn("open failed: %s", *argv); 98 exitval = 1; 99 } else { 100 add(fd, *argv); 101 } 102 } 103 104 while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0) { 105 SLIST_FOREACH(p, &desc_head, link) { 106 n = rval; 107 bp = buf; 108 do { 109 if ((wval = write(p->fd, bp, n)) == -1) { 110 warn("write failed: %s", p->name); 111 exitval = 1; 112 break; 113 } 114 bp += wval; 115 } while (n -= wval); 116 } 117 } 118 if (rval < 0) 119 err(1, "read failed"); 120 exit(exitval); 121 } 122 123 static void 124 usage(void) 125 { 126 fprintf(stderr, "usage: tee [-ai] [file ...]\n"); 127 exit(1); 128 } 129 130 static void 131 add(int fd, const char *name) 132 { 133 struct desc_list *p; 134 135 p = malloc(sizeof(struct desc_list)); 136 if (p == NULL) 137 err(1, "malloc failed"); 138 p->fd = fd; 139 p->name = name; 140 SLIST_INSERT_HEAD(&desc_head, p, link); 141 } 142