NetBSD/usr.bin/tee/tee.c

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1993-03-21 12:45:37 +03:00
/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1988 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)tee.c 5.11 (Berkeley) 5/6/91";
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct _list {
struct _list *next;
int fd;
char *name;
} LIST;
LIST *head;
main(argc, argv)
int argc;
char **argv;
{
extern int errno, optind;
register LIST *p;
register int n, fd, rval, wval;
register char *bp;
int append, ch, exitval;
char *buf;
off_t lseek();
append = 0;
while ((ch = getopt(argc, argv, "ai")) != EOF)
switch((char)ch) {
case 'a':
append = 1;
break;
case 'i':
(void)signal(SIGINT, SIG_IGN);
break;
case '?':
default:
(void)fprintf(stderr, "usage: tee [-ai] [file ...]\n");
exit(1);
}
argv += optind;
argc -= optind;
if (!(buf = malloc((u_int)8 * 1024))) {
(void)fprintf(stderr, "tee: out of space.\n");
exit(1);
}
add(STDOUT_FILENO, "stdout");
for (; *argv; ++argv)
if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND :
O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0)
(void)fprintf(stderr, "tee: %s: %s.\n",
*argv, strerror(errno));
else
add(fd, *argv);
exitval = 0;
while ((rval = read(STDIN_FILENO, buf, sizeof(buf))) > 0)
for (p = head; p; p = p->next) {
n = rval;
bp = buf;
do {
if ((wval = write(p->fd, bp, n)) == -1) {
(void)fprintf(stderr, "tee: %s: %s.\n",
p->name, strerror(errno));
exitval = 1;
break;
}
bp += wval;
} while (n -= wval);
}
if (rval < 0) {
(void)fprintf(stderr, "tee: read: %s\n", strerror(errno));
exit(1);
}
exit(exitval);
}
add(fd, name)
int fd;
char *name;
{
LIST *p;
if (!(p = malloc((u_int)sizeof(LIST)))) {
(void)fprintf(stderr, "tee: out of space.\n");
exit(1);
}
p->fd = fd;
p->name = name;
p->next = head;
head = p;
}