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 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1988, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)tee.c 8.1 (Berkeley) 6/6/93"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/types.h> 49 #include <sys/stat.h> 50 #include <err.h> 51 #include <fcntl.h> 52 #include <signal.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <unistd.h> 57 58 typedef struct _list { 59 struct _list *next; 60 int fd; 61 const char *name; 62 } LIST; 63 LIST *head; 64 65 void add(int, const char *); 66 static void usage(void); 67 68 int 69 main(int argc, char *argv[]) 70 { 71 LIST *p; 72 int n, fd, rval, wval; 73 char *bp; 74 int append, ch, exitval; 75 char *buf; 76 #define BSIZE (8 * 1024) 77 78 append = 0; 79 while ((ch = getopt(argc, argv, "ai")) != -1) 80 switch((char)ch) { 81 case 'a': 82 append = 1; 83 break; 84 case 'i': 85 (void)signal(SIGINT, SIG_IGN); 86 break; 87 case '?': 88 default: 89 usage(); 90 } 91 argv += optind; 92 argc -= optind; 93 94 if ((buf = malloc(BSIZE)) == NULL) 95 err(1, "malloc"); 96 97 add(STDOUT_FILENO, "stdout"); 98 99 for (exitval = 0; *argv; ++argv) 100 if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND : 101 O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0) { 102 warn("%s", *argv); 103 exitval = 1; 104 } else 105 add(fd, *argv); 106 107 while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0) 108 for (p = head; p; p = p->next) { 109 n = rval; 110 bp = buf; 111 do { 112 if ((wval = write(p->fd, bp, n)) == -1) { 113 warn("%s", p->name); 114 exitval = 1; 115 break; 116 } 117 bp += wval; 118 } while (n -= wval); 119 } 120 if (rval < 0) 121 err(1, "read"); 122 exit(exitval); 123 } 124 125 static void 126 usage(void) 127 { 128 (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n"); 129 exit(1); 130 } 131 132 void 133 add(int fd, const char *name) 134 { 135 LIST *p; 136 137 if ((p = malloc(sizeof(LIST))) == NULL) 138 err(1, "malloc"); 139 p->fd = fd; 140 p->name = name; 141 p->next = head; 142 head = p; 143 } 144