| /*- |
| * 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 MiĆkiewicz <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" |
| |
| static void sig_handler(int signo __attribute__ ((__unused__))) |
| { |
| _exit(EXIT_SUCCESS); |
| } |
| |
| static void __attribute__((__noreturn__)) usage(void) |
| { |
| FILE *out = stdout; |
| fprintf(out, _("Usage: %s [options] [file ...]\n"), |
| program_invocation_short_name); |
| |
| fputs(USAGE_SEPARATOR, out); |
| fputs(_("Reverse lines characterwise.\n"), out); |
| |
| fputs(USAGE_OPTIONS, out); |
| printf(USAGE_HELP_OPTIONS(16)); |
| printf(USAGE_MAN_TAIL("rev(1)")); |
| |
| exit(EXIT_SUCCESS); |
| } |
| |
| static void reverse_str(wchar_t *str, size_t n) |
| { |
| size_t i; |
| |
| for (i = 0; i < n / 2; ++i) { |
| wchar_t tmp = str[i]; |
| str[i] = str[n - 1 - i]; |
| str[n - 1 - i] = tmp; |
| } |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| char const *filename = "stdin"; |
| wchar_t *buf; |
| size_t len, bufsiz = BUFSIZ; |
| FILE *fp = stdin; |
| int ch, rval = EXIT_SUCCESS; |
| |
| static const struct option longopts[] = { |
| { "version", no_argument, NULL, 'V' }, |
| { "help", no_argument, NULL, 'h' }, |
| { NULL, 0, NULL, 0 } |
| }; |
| |
| setlocale(LC_ALL, ""); |
| bindtextdomain(PACKAGE, LOCALEDIR); |
| textdomain(PACKAGE); |
| atexit(close_stdout); |
| |
| signal(SIGINT, sig_handler); |
| signal(SIGTERM, sig_handler); |
| |
| while ((ch = getopt_long(argc, argv, "Vh", longopts, NULL)) != -1) |
| switch(ch) { |
| case 'V': |
| printf(UTIL_LINUX_VERSION); |
| exit(EXIT_SUCCESS); |
| case 'h': |
| usage(); |
| default: |
| errtryhelp(EXIT_FAILURE); |
| } |
| |
| 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); |
| |
| if (len == 0) |
| continue; |
| |
| /* 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); |
| } |
| if (buf[len - 1] == '\n') |
| buf[len--] = '\0'; |
| reverse_str(buf, len); |
| fputws(buf, stdout); |
| } |
| if (ferror(fp)) { |
| warn("%s", filename); |
| rval = EXIT_FAILURE; |
| } |
| fclose(fp); |
| } while(*argv); |
| |
| free(buf); |
| return rval; |
| } |
| |