Annotation of src/usr.bin/tee/tee.c, Revision 1.12
1.12 ! bluhm 1: /* $OpenBSD: tee.c,v 1.11 2016/10/28 07:22:59 schwarze Exp $ */
1.1 deraadt 2: /* $NetBSD: tee.c,v 1.5 1994/12/09 01:43:39 jtc Exp $ */
3:
4: /*
5: * Copyright (c) 1988, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.5 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include <sys/types.h>
34: #include <sys/stat.h>
1.12 ! bluhm 35: #include <sys/queue.h>
1.11 schwarze 36:
37: #include <err.h>
1.1 deraadt 38: #include <errno.h>
39: #include <fcntl.h>
1.11 schwarze 40: #include <signal.h>
1.1 deraadt 41: #include <stdio.h>
42: #include <stdlib.h>
43: #include <string.h>
1.11 schwarze 44: #include <unistd.h>
1.1 deraadt 45:
1.8 tedu 46: struct list {
1.12 ! bluhm 47: SLIST_ENTRY(list) next;
1.1 deraadt 48: int fd;
49: char *name;
1.8 tedu 50: };
1.12 ! bluhm 51: SLIST_HEAD(, list) head;
1.1 deraadt 52:
1.8 tedu 53: static void
54: add(int fd, char *name)
55: {
56: struct list *p;
57:
58: if ((p = malloc(sizeof(*p))) == NULL)
59: err(1, NULL);
60: p->fd = fd;
61: p->name = name;
1.12 ! bluhm 62: SLIST_INSERT_HEAD(&head, p, next);
1.8 tedu 63: }
1.1 deraadt 64:
65: int
1.6 deraadt 66: main(int argc, char *argv[])
1.1 deraadt 67: {
1.8 tedu 68: struct list *p;
69: int fd;
70: ssize_t n, rval, wval;
1.3 mpech 71: char *bp;
1.1 deraadt 72: int append, ch, exitval;
1.8 tedu 73: char buf[8192];
1.1 deraadt 74:
1.10 deraadt 75: if (pledge("stdio wpath cpath", NULL) == -1)
76: err(1, "pledge");
1.9 deraadt 77:
1.12 ! bluhm 78: SLIST_INIT(&head);
! 79:
1.1 deraadt 80: append = 0;
1.8 tedu 81: while ((ch = getopt(argc, argv, "ai")) != -1) {
82: switch(ch) {
1.1 deraadt 83: case 'a':
84: append = 1;
85: break;
86: case 'i':
87: (void)signal(SIGINT, SIG_IGN);
88: break;
89: default:
90: (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n");
1.11 schwarze 91: return 1;
1.1 deraadt 92: }
1.8 tedu 93: }
1.1 deraadt 94: argv += optind;
95: argc -= optind;
96:
97: add(STDOUT_FILENO, "stdout");
98:
1.8 tedu 99: exitval = 0;
100: while (*argv) {
101: if ((fd = open(*argv, O_WRONLY | O_CREAT |
102: (append ? O_APPEND : O_TRUNC), DEFFILEMODE)) == -1) {
1.1 deraadt 103: warn("%s", *argv);
104: exitval = 1;
105: } else
106: add(fd, *argv);
1.8 tedu 107: argv++;
108: }
1.9 deraadt 109:
1.10 deraadt 110: if (pledge("stdio", NULL) == -1)
111: err(1, "pledge");
1.1 deraadt 112:
1.8 tedu 113: while ((rval = read(STDIN_FILENO, buf, sizeof(buf))) > 0) {
1.12 ! bluhm 114: SLIST_FOREACH(p, &head, next) {
1.1 deraadt 115: n = rval;
116: bp = buf;
117: do {
118: if ((wval = write(p->fd, bp, n)) == -1) {
119: warn("%s", p->name);
120: exitval = 1;
121: break;
122: }
123: bp += wval;
124: } while (n -= wval);
125: }
1.8 tedu 126: }
127: if (rval == -1) {
1.1 deraadt 128: warn("read");
129: exitval = 1;
130: }
131:
1.12 ! bluhm 132: SLIST_FOREACH(p, &head, next) {
1.1 deraadt 133: if (close(p->fd) == -1) {
134: warn("%s", p->name);
135: exitval = 1;
136: }
137: }
138:
1.11 schwarze 139: return exitval;
1.1 deraadt 140: }
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