iconv.c revision 219019 
1/* $FreeBSD: head/usr.bin/iconv/iconv.c 219019 2011-02-25 00:04:39Z gabor $ */
2/* $NetBSD: iconv.c,v 1.16 2009/02/20 15:28:21 yamt Exp $ */
3
4/*-
5 * Copyright (c)2003 Citrus Project,
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31
32#include <err.h>
33#include <errno.h>
34#include <getopt.h>
35#include <iconv.h>
36#include <limits.h>
37#include <locale.h>
38#include <stdbool.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <unistd.h>
43
44static unsigned long long invalids;
45
46static void		 do_conv(FILE *, const char *, const char *, bool, bool);
47static int		 do_list(unsigned int, const char * const *, void *);
48static void		 usage(void);
49
50struct option long_options[] =
51{
52	{"from-code",		required_argument,	NULL, 'f'},
53	{"list",		no_argument,		NULL, 'l'},
54	{"silent",		no_argument,		NULL, 's'},
55        {"to-code",		required_argument,	NULL, 't'},
56        {NULL,                  no_argument,            NULL, 0}
57};
58
59static void
60usage(void)
61{
62	(void)fprintf(stderr,
63	    "Usage:\t%1$s [-cs] -f <from_code> -t <to_code> [file ...]\n"
64	    "\t%1$s -f <from_code> [-cs] [-t <to_code>] [file ...]\n"
65	    "\t%1$s -t <to_code> [-cs] [-f <from_code>] [file ...]\n"
66	    "\t%1$s -l\n", getprogname());
67	exit(1);
68}
69
70#define INBUFSIZE 1024
71#define OUTBUFSIZE (INBUFSIZE * 2)
72static void
73do_conv(FILE *fp, const char *from, const char *to, bool silent,
74    bool hide_invalid)
75{
76	iconv_t cd;
77	char inbuf[INBUFSIZE], outbuf[OUTBUFSIZE], *out;
78	char *in;
79	size_t inbytes, outbytes, ret;
80
81	if ((cd = iconv_open(to, from)) == (iconv_t)-1)
82		err(EXIT_FAILURE, "iconv_open(%s, %s)", to, from);
83
84	if (hide_invalid) {
85		int arg = 1;
86
87		if (iconvctl(cd, ICONV_SET_DISCARD_ILSEQ, (void *)&arg) == -1)
88			err(1, NULL);
89	}
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}
140
141static int
142do_list(unsigned int n, const char * const *list, void *data __unused)
143{
144	unsigned int i;
145
146	for(i = 0; i < n; i++) {
147		printf("%s", list[i]);
148		if (i < n - 1)
149			printf(" ");
150	}
151	printf("\n");
152
153	return (1);
154}
155
156int
157main(int argc, char **argv)
158{
159	FILE *fp;
160	char *opt_f, *opt_t;
161	int ch, i;
162	bool opt_c = false, opt_s = false;
163
164	opt_f = opt_t = strdup("");
165
166	setlocale(LC_ALL, "");
167	setprogname(argv[0]);
168
169	while ((ch = getopt_long(argc, argv, "csLlf:t:",
170	    long_options, NULL)) != -1) {
171		switch (ch) {
172		case 'c':
173			opt_c = true;
174			break;
175		case 's':
176			opt_s = true;
177			break;
178		case 'l':
179			/* list */
180			if (opt_s || opt_c || strcmp(opt_f, "") != 0 ||
181			    strcmp(opt_t, "") != 0) {
182				warnx("-l is not allowed with other flags.");
183				usage();
184			}
185			iconvlist(do_list, NULL);
186			return (EXIT_SUCCESS);
187		case 'f':
188			/* from */
189			if (optarg != NULL)
190				opt_f = strdup(optarg);
191			break;
192		case 't':
193			/* to */
194			if (optarg != NULL)
195				opt_t = strdup(optarg);
196			break;
197		default:
198			usage();
199		}
200	}
201	argc -= optind;
202	argv += optind;
203	if ((strcmp(opt_f, "") == 0) && (strcmp(opt_t, "") == 0))
204		usage();
205	if (argc == 0)
206		do_conv(stdin, opt_f, opt_t, opt_s, opt_c);
207	else {
208		for (i = 0; i < argc; i++) {
209			fp = (strcmp(argv[i], "-") != 0) ?
210			    fopen(argv[i], "r") : stdin;
211			if (fp == NULL)
212				err(EXIT_FAILURE, "Cannot open `%s'",
213				    argv[i]);
214			do_conv(fp, opt_f, opt_t, opt_s,
215			    opt_c);
216			(void)fclose(fp);
217		}
218	}
219	return (EXIT_SUCCESS);
220}
221