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 * 4. 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 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1988, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)tee.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 static const char rcsid[] = 41 "$FreeBSD$"; 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 #include <sys/stat.h> 46 #include <err.h> 47 #include <fcntl.h> 48 #include <signal.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 54 typedef struct _list { 55 struct _list *next; 56 int fd; 57 const char *name; 58 } LIST; 59 LIST *head; 60 61 void add(int, const char *); 62 static void usage(void); 63 64 int 65 main(int argc, char *argv[]) 66 { 67 LIST *p; 68 int n, fd, rval, wval; 69 char *bp; 70 int append, ch, exitval; 71 char *buf; 72 #define BSIZE (8 * 1024) 73 74 append = 0; 75 while ((ch = getopt(argc, argv, "ai")) != -1) 76 switch((char)ch) { 77 case 'a': 78 append = 1; 79 break; 80 case 'i': 81 (void)signal(SIGINT, SIG_IGN); 82 break; 83 case '?': 84 default: 85 usage(); 86 } 87 argv += optind; 88 argc -= optind; 89 90 if ((buf = malloc(BSIZE)) == NULL) 91 err(1, "malloc"); 92 93 add(STDOUT_FILENO, "stdout"); 94 95 for (exitval = 0; *argv; ++argv) 96 if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND : 97 O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0) { 98 warn("%s", *argv); 99 exitval = 1; 100 } else 101 add(fd, *argv); 102 103 while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0) 104 for (p = head; p; p = p->next) { 105 n = rval; 106 bp = buf; 107 do { 108 if ((wval = write(p->fd, bp, n)) == -1) { 109 warn("%s", p->name); 110 exitval = 1; 111 break; 112 } 113 bp += wval; 114 } while (n -= wval); 115 } 116 if (rval < 0) 117 err(1, "read"); 118 exit(exitval); 119 } 120 121 static void 122 usage(void) 123 { 124 (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n"); 125 exit(1); 126 } 127 128 void 129 add(int fd, const char *name) 130 { 131 LIST *p; 132 133 if ((p = malloc(sizeof(LIST))) == NULL) 134 err(1, "malloc"); 135 p->fd = fd; 136 p->name = name; 137 p->next = head; 138 head = p; 139 } 140