tee/tee.c

   1 /*      $NetBSD: tee.c,v 1.6 1997/10/20 00:37:11 lukem Exp $    */
   2
   3 /*
   4  * Copyright (c) 1988, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #ifndef lint
  38 __COPYRIGHT("@(#) Copyright (c) 1988, 1993\n\
  39         The Regents of the University of California.  All rights reserved.\n");
  40 #endif /* not lint */
  41
  42 #ifndef lint
  43 #if 0
  44 static char sccsid[] = "@(#)tee.c       8.1 (Berkeley) 6/6/93";
  45 #endif
  46 __RCSID("$NetBSD: tee.c,v 1.6 1997/10/20 00:37:11 lukem Exp $");
  47 #endif
  48
  49 #include <sys/types.h>
  50 #include <sys/stat.h>
  51 #include <signal.h>
  52 #include <errno.h>
  53 #include <fcntl.h>
  54 #include <unistd.h>
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57 #include <string.h>
  58 #include <locale.h>
  59 #include <err.h>
  60
  61 typedef struct _list {
  62         struct _list *next;
  63         int fd;
  64         char *name;
  65 } LIST;
  66 LIST *head;
  67
  68 void    add __P((int, char *));
  69 int     main __P((int, char **));
  70
  71 int
  72 main(argc, argv)
  73         int argc;
  74         char *argv[];
  75 {
  76         LIST *p;
  77         int n, fd, rval, wval;
  78         char *bp;
  79         int append, ch, exitval;
  80         char *buf;
  81 #define BSIZE (8 * 1024)
  82
  83         setlocale(LC_ALL, "");
  84
  85         append = 0;
  86         while ((ch = getopt(argc, argv, "ai")) != -1)
  87                 switch((char)ch) {
  88                 case 'a':
  89                         append = 1;
  90                         break;
  91                 case 'i':
  92                         (void)signal(SIGINT, SIG_IGN);
  93                         break;
  94                 case '?':
  95                 default:
  96                         (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n");
  97                         exit(1);
  98                 }
  99         argv += optind;
 100         argc -= optind;
 101
 102         if ((buf = malloc((size_t)BSIZE)) == NULL)
 103                 err(1, "malloc");
 104
 105         add(STDOUT_FILENO, "stdout");
 106
 107         for (exitval = 0; *argv; ++argv)
 108                 if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND :
 109                     O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0) {
 110                         warn("%s", *argv);
 111                         exitval = 1;
 112                 } else
 113                         add(fd, *argv);
 114
 115         while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0)
 116                 for (p = head; p; p = p->next) {
 117                         n = rval;
 118                         bp = buf;
 119                         do {
 120                                 if ((wval = write(p->fd, bp, n)) == -1) {
 121                                         warn("%s", p->name);
 122                                         exitval = 1;
 123                                         break;
 124                                 }
 125                                 bp += wval;
 126                         } while (n -= wval);
 127                 }
 128         if (rval < 0) {
 129                 warn("read");
 130                 exitval = 1;
 131         }
 132
 133         for (p = head; p; p = p->next) {
 134                 if (close(p->fd) == -1) {
 135                         warn("%s", p->name);
 136                         exitval = 1;
 137                 }
 138         }
 139
 140         exit(exitval);
 141 }
 142
 143 void
 144 add(fd, name)
 145         int fd;
 146         char *name;
 147 {
 148         LIST *p;
 149
 150         if ((p = malloc((size_t)sizeof(LIST))) == NULL)
 151                 err(1, "malloc");
 152         p->fd = fd;
 153         p->name = name;
 154         p->next = head;
 155         head = p;
 156 }