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 * 3. 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 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 110 usage(void) 111 { 112 (void)fprintf(stderr, "usage: rev [file ...]\n"); 113 exit(1); 114 } 115