Annotation of src/usr.bin/tee/tee.c, Revision 1.11
1.11 ! schwarze 1: /* $OpenBSD: tee.c,v 1.10 2015/10/09 01:37:09 deraadt 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>
1.11 ! schwarze 35:
! 36: #include <err.h>
1.1 deraadt 37: #include <errno.h>
38: #include <fcntl.h>
1.11 ! schwarze 39: #include <signal.h>
1.1 deraadt 40: #include <stdio.h>
41: #include <stdlib.h>
42: #include <string.h>
1.11 ! schwarze 43: #include <unistd.h>
1.1 deraadt 44:
1.8 tedu 45: struct list {
46: struct list *next;
1.1 deraadt 47: int fd;
48: char *name;
1.8 tedu 49: };
50: struct list *head;
1.1 deraadt 51:
1.8 tedu 52: static void
53: add(int fd, char *name)
54: {
55: struct list *p;
56:
57: if ((p = malloc(sizeof(*p))) == NULL)
58: err(1, NULL);
59: p->fd = fd;
60: p->name = name;
61: p->next = head;
62: head = p;
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:
1.1 deraadt 78: append = 0;
1.8 tedu 79: while ((ch = getopt(argc, argv, "ai")) != -1) {
80: switch(ch) {
1.1 deraadt 81: case 'a':
82: append = 1;
83: break;
84: case 'i':
85: (void)signal(SIGINT, SIG_IGN);
86: break;
87: default:
88: (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n");
1.11 ! schwarze 89: return 1;
1.1 deraadt 90: }
1.8 tedu 91: }
1.1 deraadt 92: argv += optind;
93: argc -= optind;
94:
95: add(STDOUT_FILENO, "stdout");
96:
1.8 tedu 97: exitval = 0;
98: while (*argv) {
99: if ((fd = open(*argv, O_WRONLY | O_CREAT |
100: (append ? O_APPEND : O_TRUNC), DEFFILEMODE)) == -1) {
1.1 deraadt 101: warn("%s", *argv);
102: exitval = 1;
103: } else
104: add(fd, *argv);
1.8 tedu 105: argv++;
106: }
1.9 deraadt 107:
1.10 deraadt 108: if (pledge("stdio", NULL) == -1)
109: err(1, "pledge");
1.1 deraadt 110:
1.8 tedu 111: while ((rval = read(STDIN_FILENO, buf, sizeof(buf))) > 0) {
1.1 deraadt 112: for (p = head; p; p = p->next) {
113: n = rval;
114: bp = buf;
115: do {
116: if ((wval = write(p->fd, bp, n)) == -1) {
117: warn("%s", p->name);
118: exitval = 1;
119: break;
120: }
121: bp += wval;
122: } while (n -= wval);
123: }
1.8 tedu 124: }
125: if (rval == -1) {
1.1 deraadt 126: warn("read");
127: exitval = 1;
128: }
129:
130: for (p = head; p; p = p->next) {
131: if (close(p->fd) == -1) {
132: warn("%s", p->name);
133: exitval = 1;
134: }
135: }
136:
1.11 ! schwarze 137: return exitval;
1.1 deraadt 138: }
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