| File: | src/usr.bin/tee/tee.c |
| Warning: | line 96, column 2 Value stored to 'argc' is never read |
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| 1 | /* $OpenBSD: tee.c,v 1.14 2021/12/13 18:33:23 cheloha Exp $ */ |
| 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. |
| 16 | * 3. Neither the name of the University nor the names of its contributors |
| 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> |
| 35 | #include <sys/queue.h> |
| 36 | |
| 37 | #include <err.h> |
| 38 | #include <errno(*__errno()).h> |
| 39 | #include <fcntl.h> |
| 40 | #include <signal.h> |
| 41 | #include <stdio.h> |
| 42 | #include <stdlib.h> |
| 43 | #include <string.h> |
| 44 | #include <unistd.h> |
| 45 | |
| 46 | #define BSIZE(64 * 1024) (64 * 1024) |
| 47 | |
| 48 | struct list { |
| 49 | SLIST_ENTRY(list)struct { struct list *sle_next; } next; |
| 50 | int fd; |
| 51 | char *name; |
| 52 | }; |
| 53 | SLIST_HEAD(, list)struct { struct list *slh_first; } head; |
| 54 | |
| 55 | static void |
| 56 | add(int fd, char *name) |
| 57 | { |
| 58 | struct list *p; |
| 59 | |
| 60 | if ((p = malloc(sizeof(*p))) == NULL((void *)0)) |
| 61 | err(1, NULL((void *)0)); |
| 62 | p->fd = fd; |
| 63 | p->name = name; |
| 64 | SLIST_INSERT_HEAD(&head, p, next)do { (p)->next.sle_next = (&head)->slh_first; (& head)->slh_first = (p); } while (0); |
| 65 | } |
| 66 | |
| 67 | int |
| 68 | main(int argc, char *argv[]) |
| 69 | { |
| 70 | struct list *p; |
| 71 | int fd; |
| 72 | ssize_t n, rval, wval; |
| 73 | int append, ch, exitval; |
| 74 | char *buf; |
| 75 | |
| 76 | if (pledge("stdio wpath cpath", NULL((void *)0)) == -1) |
| 77 | err(1, "pledge"); |
| 78 | |
| 79 | SLIST_INIT(&head){ ((&head)->slh_first) = ((void *)0); }; |
| 80 | |
| 81 | append = 0; |
| 82 | while ((ch = getopt(argc, argv, "ai")) != -1) { |
| 83 | switch(ch) { |
| 84 | case 'a': |
| 85 | append = 1; |
| 86 | break; |
| 87 | case 'i': |
| 88 | (void)signal(SIGINT2, SIG_IGN(void (*)(int))1); |
| 89 | break; |
| 90 | default: |
| 91 | (void)fprintf(stderr(&__sF[2]), "usage: tee [-ai] [file ...]\n"); |
| 92 | return 1; |
| 93 | } |
| 94 | } |
| 95 | argv += optind; |
| 96 | argc -= optind; |
Value stored to 'argc' is never read | |
| 97 | |
| 98 | add(STDOUT_FILENO1, "stdout"); |
| 99 | |
| 100 | exitval = 0; |
| 101 | while (*argv) { |
| 102 | if ((fd = open(*argv, O_WRONLY0x0001 | O_CREAT0x0200 | |
| 103 | (append ? O_APPEND0x0008 : O_TRUNC0x0400), DEFFILEMODE(0000400|0000200|0000040|0000020|0000004|0000002))) == -1) { |
| 104 | warn("%s", *argv); |
| 105 | exitval = 1; |
| 106 | } else |
| 107 | add(fd, *argv); |
| 108 | argv++; |
| 109 | } |
| 110 | |
| 111 | if (pledge("stdio", NULL((void *)0)) == -1) |
| 112 | err(1, "pledge"); |
| 113 | |
| 114 | buf = malloc(BSIZE(64 * 1024)); |
| 115 | if (buf == NULL((void *)0)) |
| 116 | err(1, NULL((void *)0)); |
| 117 | while ((rval = read(STDIN_FILENO0, buf, BSIZE(64 * 1024))) > 0) { |
| 118 | SLIST_FOREACH(p, &head, next)for((p) = ((&head)->slh_first); (p) != ((void *)0); (p ) = ((p)->next.sle_next)) { |
| 119 | for (n = 0; n < rval; n += wval) { |
| 120 | wval = write(p->fd, buf + n, rval - n); |
| 121 | if (wval == -1) { |
| 122 | warn("%s", p->name); |
| 123 | exitval = 1; |
| 124 | break; |
| 125 | } |
| 126 | } |
| 127 | } |
| 128 | } |
| 129 | free(buf); |
| 130 | if (rval == -1) { |
| 131 | warn("read"); |
| 132 | exitval = 1; |
| 133 | } |
| 134 | |
| 135 | SLIST_FOREACH(p, &head, next)for((p) = ((&head)->slh_first); (p) != ((void *)0); (p ) = ((p)->next.sle_next)) { |
| 136 | if (close(p->fd) == -1) { |
| 137 | warn("%s", p->name); |
| 138 | exitval = 1; |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | return exitval; |
| 143 | } |