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