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+/*-
+ * Copyright (c) 1987, 1992 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. 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.
+ *
+ * Modified for Linux by Charles Hannum (mycroft@gnu.ai.mit.edu)
+ * and Brian Koehmstedt (bpk@gnu.ai.mit.edu)
+ *
+ * Wed Sep 14 22:26:00 1994: Patch from bjdouma <bjdouma@xs4all.nl> to handle
+ * last line that has no newline correctly.
+ * 3-Jun-1998: Patched by Nicolai Langfeldt to work better on Linux:
+ * Handle any-length-lines. Code copied from util-linux' setpwnam.c
+ * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
+ * added Native Language Support
+ * 1999-09-19 Bruno Haible <haible@clisp.cons.org>
+ * modified to work correctly in multi-byte locales
+ * July 2010 - Davidlohr Bueso <dave@gnu.org>
+ * Fixed memory leaks (including Linux signal handling)
+ * Added some memory allocation error handling
+ * Lowered the default buffer size to 256, instead of 512 bytes
+ * Changed tab indentation to 8 chars for better reading the code
+ */
+
+#include <stdarg.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <signal.h>
+#include <getopt.h>
+
+#include "nls.h"
+#include "xalloc.h"
+#include "widechar.h"
+#include "c.h"
+#include "closestream.h"
+
+wchar_t *buf;
+
+static void sig_handler(int signo __attribute__ ((__unused__)))
+{
+ free(buf);
+ _exit(EXIT_SUCCESS);
+}
+
+static void __attribute__ ((__noreturn__)) usage(FILE * out)
+{
+ fprintf(out, _("Usage: %s [options] [file ...]\n"),
+ program_invocation_short_name);
+
+ fprintf(out, _("\nOptions:\n"
+ " -V, --version output version information and exit\n"
+ " -h, --help display this help and exit\n"));
+
+ fprintf(out, _("\nFor more information see rev(1).\n"));
+
+ exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
+}
+
+int main(int argc, char *argv[])
+{
+ char *filename = "stdin";
+ wchar_t *t;
+ size_t len, bufsiz = BUFSIZ;
+ FILE *fp = stdin;
+ int ch, rval = EXIT_SUCCESS;
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ atexit(close_stdout);
+
+ signal(SIGINT, sig_handler);
+ signal(SIGTERM, sig_handler);
+
+ static const struct option longopts[] = {
+ { "version", no_argument, 0, 'V' },
+ { "help", no_argument, 0, 'h' },
+ { NULL, 0, 0, 0 }
+ };
+
+ while ((ch = getopt_long(argc, argv, "Vh", longopts, NULL)) != -1)
+ switch(ch) {
+ case 'V':
+ printf(_("%s from %s\n"), program_invocation_short_name,
+ PACKAGE_STRING);
+ exit(EXIT_SUCCESS);
+ case 'h':
+ usage(stdout);
+ default:
+ usage(stderr);
+ }
+
+ argc -= optind;
+ argv += optind;
+
+ buf = xmalloc(bufsiz * sizeof(wchar_t));
+
+ do {
+ if (*argv) {
+ if ((fp = fopen(*argv, "r")) == NULL) {
+ warn(_("cannot open %s"), *argv );
+ rval = EXIT_FAILURE;
+ ++argv;
+ continue;
+ }
+ filename = *argv++;
+ }
+
+ while (fgetws(buf, bufsiz, fp)) {
+ len = wcslen(buf);
+
+ /* This is my hack from setpwnam.c -janl */
+ while (buf[len-1] != '\n' && !feof(fp)) {
+ /* Extend input buffer if it failed getting the whole line */
+ /* So now we double the buffer size */
+ bufsiz *= 2;
+
+ buf = xrealloc(buf, bufsiz * sizeof(wchar_t));
+
+ /* And fill the rest of the buffer */
+ if (!fgetws(&buf[len], bufsiz/2, fp))
+ break;
+
+ len = wcslen(buf);
+ }
+
+ t = buf + len - 1 - (*(buf+len-1)=='\r' || *(buf+len-1)=='\n');
+ for ( ; t >= buf; --t) {
+ if (*t != 0)
+ putwchar(*t);
+ }
+ putwchar('\n');
+ }
+
+ fflush(fp);
+ if (ferror(fp)) {
+ warn("%s", filename);
+ rval = EXIT_FAILURE;
+ }
+ if (fclose(fp))
+ rval = EXIT_FAILURE;
+ } while(*argv);
+
+ free(buf);
+ return rval;
+}
+