1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1987, 1992, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #if 0 39 #endif 40 41 #include <sys/cdefs.h> 42 #include <sys/types.h> 43 44 #include <err.h> 45 #include <errno.h> 46 #include <locale.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include <wchar.h> 52 53 static void usage(void) __dead2; 54 55 int 56 main(int argc, char *argv[]) 57 { 58 const char *filename; 59 wchar_t *p, *t; 60 FILE *fp; 61 size_t len; 62 int ch, rval; 63 64 setlocale(LC_ALL, ""); 65 66 while ((ch = getopt(argc, argv, "")) != -1) 67 switch(ch) { 68 case '?': 69 default: 70 usage(); 71 } 72 73 argc -= optind; 74 argv += optind; 75 76 fp = stdin; 77 filename = "stdin"; 78 rval = 0; 79 do { 80 if (*argv) { 81 if ((fp = fopen(*argv, "r")) == NULL) { 82 warn("%s", *argv); 83 rval = 1; 84 ++argv; 85 continue; 86 } 87 filename = *argv++; 88 } 89 while ((p = fgetwln(fp, &len)) != NULL) { 90 if (p[len - 1] == '\n') 91 --len; 92 for (t = p + len - 1; t >= p; --t) 93 putwchar(*t); 94 putwchar('\n'); 95 } 96 if (ferror(fp)) { 97 warn("%s", filename); 98 clearerr(fp); 99 rval = 1; 100 } 101 (void)fclose(fp); 102 } while(*argv); 103 exit(rval); 104 } 105 106 void 107 usage(void) 108 { 109 (void)fprintf(stderr, "usage: rev [file ...]\n"); 110 exit(1); 111 } 112