1/* $FreeBSD: stable/11/usr.bin/iconv/iconv.c 330449 2018-03-05 07:26:05Z eadler $ */
2/* $NetBSD: iconv.c,v 1.16 2009/02/20 15:28:21 yamt Exp $ */
3
4/*-
5 * SPDX-License-Identifier: BSD-2-Clause
6 *
7 * Copyright (c)2003 Citrus Project,
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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
34#include <err.h>
35#include <errno.h>
36#include <getopt.h>
37#include <iconv.h>
38#include <limits.h>
39#include <locale.h>
40#include <stdbool.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <unistd.h>
45
46static int		do_conv(FILE *, const char *, const char *, bool, bool);
47static int		do_list(unsigned int, const char * const *, void *);
48static void		usage(void) __dead2;
49
50static const struct option long_options[] = {
51	{"from-code",		required_argument,	NULL, 'f'},
52	{"list",		no_argument,		NULL, 'l'},
53	{"silent",		no_argument,		NULL, 's'},
54        {"to-code",		required_argument,	NULL, 't'},
55        {NULL,                  no_argument,            NULL, 0}
56};
57
58static void
59usage(void)
60{
61	(void)fprintf(stderr,
62	    "Usage:\t%1$s [-cs] -f <from_code> -t <to_code> [file ...]\n"
63	    "\t%1$s -f <from_code> [-cs] [-t <to_code>] [file ...]\n"
64	    "\t%1$s -t <to_code> [-cs] [-f <from_code>] [file ...]\n"
65	    "\t%1$s -l\n", getprogname());
66	exit(1);
67}
68
69#define INBUFSIZE 1024
70#define OUTBUFSIZE (INBUFSIZE * 2)
71static int
72do_conv(FILE *fp, const char *from, const char *to, bool silent,
73    bool hide_invalid)
74{
75	iconv_t cd;
76	char inbuf[INBUFSIZE], outbuf[OUTBUFSIZE], *in, *out;
77	unsigned long long invalids;
78	size_t inbytes, outbytes, ret;
79
80	if ((cd = iconv_open(to, from)) == (iconv_t)-1)
81		err(EXIT_FAILURE, "iconv_open(%s, %s)", to, from);
82
83	if (hide_invalid) {
84		int arg = 1;
85
86		if (iconvctl(cd, ICONV_SET_DISCARD_ILSEQ, (void *)&arg) == -1)
87			err(EXIT_FAILURE, NULL);
88	}
89	invalids = 0;
90	while ((inbytes = fread(inbuf, 1, INBUFSIZE, fp)) > 0) {
91		in = inbuf;
92		while (inbytes > 0) {
93			size_t inval;
94
95			out = outbuf;
96			outbytes = OUTBUFSIZE;
97			ret = __iconv(cd, &in, &inbytes, &out, &outbytes,
98			    0, &inval);
99			invalids += inval;
100			if (outbytes < OUTBUFSIZE)
101				(void)fwrite(outbuf, 1, OUTBUFSIZE - outbytes,
102				    stdout);
103			if (ret == (size_t)-1 && errno != E2BIG) {
104				if (errno != EINVAL || in == inbuf)
105					err(EXIT_FAILURE, "iconv()");
106
107				/* incomplete input character */
108				(void)memmove(inbuf, in, inbytes);
109				ret = fread(inbuf + inbytes, 1,
110				    INBUFSIZE - inbytes, fp);
111				if (ret == 0) {
112					fflush(stdout);
113					if (feof(fp))
114						errx(EXIT_FAILURE,
115						    "unexpected end of file; "
116						    "the last character is "
117						    "incomplete.");
118					else
119						err(EXIT_FAILURE, "fread()");
120				}
121				in = inbuf;
122				inbytes += ret;
123			}
124		}
125	}
126	/* reset the shift state of the output buffer */
127	outbytes = OUTBUFSIZE;
128	out = outbuf;
129	ret = iconv(cd, NULL, NULL, &out, &outbytes);
130	if (ret == (size_t)-1)
131		err(EXIT_FAILURE, "iconv()");
132	if (outbytes < OUTBUFSIZE)
133		(void)fwrite(outbuf, 1, OUTBUFSIZE - outbytes, stdout);
134
135	if (invalids > 0 && !silent)
136		warnx("warning: invalid characters: %llu", invalids);
137
138	iconv_close(cd);
139	return (invalids > 0);
140}
141
142static int
143do_list(unsigned int n, const char * const *list, void *data __unused)
144{
145	unsigned int i;
146
147	for(i = 0; i < n; i++) {
148		printf("%s", list[i]);
149		if (i < n - 1)
150			printf(" ");
151	}
152	printf("\n");
153
154	return (1);
155}
156
157int
158main(int argc, char **argv)
159{
160	FILE *fp;
161	const char *opt_f, *opt_t;
162	int ch, i, res;
163	bool opt_c = false, opt_s = false;
164
165	opt_f = opt_t = "";
166
167	setlocale(LC_ALL, "");
168	setprogname(argv[0]);
169
170	while ((ch = getopt_long(argc, argv, "csLlf:t:",
171	    long_options, NULL)) != -1) {
172		switch (ch) {
173		case 'c':
174			opt_c = true;
175			break;
176		case 's':
177			opt_s = true;
178			break;
179		case 'l':
180			/* list */
181			if (opt_s || opt_c || strcmp(opt_f, "") != 0 ||
182			    strcmp(opt_t, "") != 0) {
183				warnx("-l is not allowed with other flags.");
184				usage();
185			}
186			iconvlist(do_list, NULL);
187			return (EXIT_SUCCESS);
188		case 'f':
189			/* from */
190			if (optarg != NULL)
191				opt_f = optarg;
192			break;
193		case 't':
194			/* to */
195			if (optarg != NULL)
196				opt_t = optarg;
197			break;
198		default:
199			usage();
200		}
201	}
202	argc -= optind;
203	argv += optind;
204	if ((strcmp(opt_f, "") == 0) && (strcmp(opt_t, "") == 0))
205		usage();
206	if (argc == 0)
207		res = do_conv(stdin, opt_f, opt_t, opt_s, opt_c);
208	else {
209		res = 0;
210		for (i = 0; i < argc; i++) {
211			fp = (strcmp(argv[i], "-") != 0) ?
212			    fopen(argv[i], "r") : stdin;
213			if (fp == NULL)
214				err(EXIT_FAILURE, "Cannot open `%s'",
215				    argv[i]);
216			res |= do_conv(fp, opt_f, opt_t, opt_s, opt_c);
217			(void)fclose(fp);
218		}
219	}
220	return (res == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
221}
222