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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1987, 1992, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #if 0 41 #ifndef lint 42 static char sccsid[] = "@(#)rev.c 8.3 (Berkeley) 5/4/95"; 43 #endif /* not lint */ 44 #endif 45 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 #include <sys/types.h> 50 51 #include <err.h> 52 #include <errno.h> 53 #include <locale.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 #include <wchar.h> 59 60 static void usage(void); 61 62 int 63 main(int argc, char *argv[]) 64 { 65 const char *filename; 66 wchar_t *p, *t; 67 FILE *fp; 68 size_t len; 69 int ch, rval; 70 71 setlocale(LC_ALL, ""); 72 73 while ((ch = getopt(argc, argv, "")) != -1) 74 switch(ch) { 75 case '?': 76 default: 77 usage(); 78 } 79 80 argc -= optind; 81 argv += optind; 82 83 fp = stdin; 84 filename = "stdin"; 85 rval = 0; 86 do { 87 if (*argv) { 88 if ((fp = fopen(*argv, "r")) == NULL) { 89 warn("%s", *argv); 90 rval = 1; 91 ++argv; 92 continue; 93 } 94 filename = *argv++; 95 } 96 while ((p = fgetwln(fp, &len)) != NULL) { 97 if (p[len - 1] == '\n') 98 --len; 99 for (t = p + len - 1; t >= p; --t) 100 putwchar(*t); 101 putwchar('\n'); 102 } 103 if (ferror(fp)) { 104 warn("%s", filename); 105 clearerr(fp); 106 rval = 1; 107 } 108 (void)fclose(fp); 109 } while(*argv); 110 exit(rval); 111 } 112 113 void 114 usage(void) 115 { 116 (void)fprintf(stderr, "usage: rev [file ...]\n"); 117 exit(1); 118 } 119