1 /* $NetBSD: rev.c,v 1.12 2011/09/16 15:39:28 joerg Exp $ */
2
3 /*-
4 * Copyright (c) 1987, 1992, 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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __COPYRIGHT("@(#) Copyright (c) 1987, 1992, 1993\
35 The Regents of the University of California. All rights reserved.");
36 #endif /* not lint */
37
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)rev.c 8.3 (Berkeley) 5/4/95";
41 #else
42 __RCSID("$NetBSD: rev.c,v 1.12 2011/09/16 15:39:28 joerg Exp $");
43 #endif
44 #endif /* not lint */
45
46 #include <sys/types.h>
47
48 #include <err.h>
49 #include <errno.h>
50 #include <locale.h>
51 #include <stdio.h>
52 #include <stdlib.h>
53 #include <unistd.h>
54 #include <wchar.h>
55
56 __dead static void usage(void);
57
58 int
main(int argc,char * argv[])59 main(int argc, char *argv[])
60 {
61 const char *filename;
62 wchar_t *p, *t;
63 FILE *fp;
64 size_t len;
65 int ch, rval;
66
67 setlocale(LC_ALL, "");
68 setprogname(argv[0]);
69
70 while ((ch = getopt(argc, argv, "")) != -1)
71 switch(ch) {
72 case '?':
73 default:
74 usage();
75 }
76
77 argc -= optind;
78 argv += optind;
79
80 fp = stdin;
81 filename = "stdin";
82 rval = 0;
83 do {
84 if (*argv) {
85 if ((fp = fopen(*argv, "r")) == NULL) {
86 warn("%s", *argv);
87 rval = 1;
88 ++argv;
89 continue;
90 }
91 filename = *argv++;
92 }
93 while ((p = fgetwln(fp, &len)) != NULL) {
94 if (p[len - 1] == L'\n')
95 --len;
96 t = p + len - 1;
97 for (t = p + len - 1; t >= p; --t)
98 putwchar(*t);
99 putwchar(L'\n');
100 }
101 if (ferror(fp)) {
102 warn("%s", filename);
103 rval = 1;
104 }
105 (void)fclose(fp);
106 } while(*argv);
107 exit(rval);
108 }
109
110 static void
usage(void)111 usage(void)
112 {
113 (void)fprintf(stderr, "usage: %s [file ...]\n", getprogname());
114 exit(EXIT_FAILURE);
115 }
116