1 /*-
2 * Copyright (c) 1987, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef lint
31 static const char copyright[] =
32 "@(#) Copyright (c) 1987, 1992, 1993\n\
33 The Regents of the University of California. All rights reserved.\n";
34 #endif /* not lint */
35
36 #if 0
37 #ifndef lint
38 static char sccsid[] = "@(#)rev.c 8.3 (Berkeley) 5/4/95";
39 #endif /* not lint */
40 #endif
41
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
44
45 #include <sys/types.h>
46
47 #include <err.h>
48 #include <errno.h>
49 #include <locale.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <unistd.h>
54 #include <wchar.h>
55
56 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
69 while ((ch = getopt(argc, argv, "")) != -1)
70 switch(ch) {
71 case '?':
72 default:
73 usage();
74 }
75
76 argc -= optind;
77 argv += optind;
78
79 fp = stdin;
80 filename = "stdin";
81 rval = 0;
82 do {
83 if (*argv) {
84 if ((fp = fopen(*argv, "r")) == NULL) {
85 warn("%s", *argv);
86 rval = 1;
87 ++argv;
88 continue;
89 }
90 filename = *argv++;
91 }
92 while ((p = fgetwln(fp, &len)) != NULL) {
93 if (p[len - 1] == '\n')
94 --len;
95 for (t = p + len - 1; t >= p; --t)
96 putwchar(*t);
97 putwchar('\n');
98 }
99 if (ferror(fp)) {
100 warn("%s", filename);
101 clearerr(fp);
102 rval = 1;
103 }
104 (void)fclose(fp);
105 } while(*argv);
106 exit(rval);
107 }
108
109 void
usage(void)110 usage(void)
111 {
112 (void)fprintf(stderr, "usage: rev [file ...]\n");
113 exit(1);
114 }
115