/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1987, 1992, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/types.h> #include <err.h> #include <errno.h> #include <locale.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <wchar.h> static void usage(void) __dead2; int main(int argc, char *argv[]) { const char *filename; wchar_t *p, *t; FILE *fp; size_t len; int ch, rval; setlocale(LC_ALL, ""); while ((ch = getopt(argc, argv, "")) != -1) switch(ch) { case '?': default: usage(); } argc -= optind; argv += optind; fp = stdin; filename = "stdin"; rval = 0; do { if (*argv) { if ((fp = fopen(*argv, "r")) == NULL) { warn("%s", *argv); rval = 1; ++argv; continue; } filename = *argv++; } while ((p = fgetwln(fp, &len)) != NULL) { if (p[len - 1] == '\n') --len; for (t = p + len - 1; t >= p; --t) putwchar(*t); putwchar('\n'); } if (ferror(fp)) { warn("%s", filename); clearerr(fp); rval = 1; } (void)fclose(fp); } while(*argv); exit(rval); } void usage(void) { (void)fprintf(stderr, "usage: rev [file ...]\n"); exit(1); }