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 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 111 usage(void) 112 { 113 (void)fprintf(stderr, "usage: %s [file ...]\n", getprogname()); 114 exit(EXIT_FAILURE); 115 } 116