2 * Copyright (c) 1987, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 * @(#) Copyright (c) 1987, 1992, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)rev.c 8.3 (Berkeley) 5/4/95
31 * $DragonFly: src/usr.bin/rev/rev.c,v 1.8 2008/10/16 01:52:33 swildner Exp $
34 #include <sys/types.h>
41 static void usage(void);
42 static int dorev(FILE *, const char *);
45 main(int argc, char **argv)
52 while ((ch = getopt(argc, argv, "")) != -1)
63 rval += dorev(stdin, "stdin");
65 for (i = 0; i < argc; ++i) {
66 if ((fp = fopen(argv[i], "r")) != NULL) {
67 rval += dorev(fp, argv[i]);
70 warn("failed to open %s", argv[i]);
75 exit(rval != 0 ? 1 : 0);
81 fprintf(stderr, "usage: rev [file ...]\n");
86 dorev(FILE *fp, const char *filepath)
91 while ((p = fgetln(fp, &len)) != NULL) {
92 if (p[len - 1] == '\n')
94 for (t = p + len - 1; t >= p; --t)
100 warn("%s", filepath);
101 /* Reset error indicator */