/* $NetBSD: iconv.c,v 1.16 2009/02/20 15:28:21 yamt Exp $ */
/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c)2003 Citrus Project,
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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/cdefs.h>
#include <sys/capsicum.h>
#include <capsicum_helpers.h>
#include <err.h>
#include <errno.h>
#include <getopt.h>
#include <iconv.h>
#include <limits.h>
#include <locale.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static int do_conv(FILE *, iconv_t, bool, bool);
static int do_list(unsigned int, const char * const *, void *);
static void usage(void) __dead2;
static const struct option long_options[] = {
{"from-code", required_argument, NULL, 'f'},
{"list", no_argument, NULL, 'l'},
{"silent", no_argument, NULL, 's'},
{"to-code", required_argument, NULL, 't'},
{NULL, no_argument, NULL, 0}
};
static void
usage(void)
{
(void)fprintf(stderr,
"Usage:\t%1$s [-cs] -f <from_code> -t <to_code> [file ...]\n"
"\t%1$s -f <from_code> [-cs] [-t <to_code>] [file ...]\n"
"\t%1$s -t <to_code> [-cs] [-f <from_code>] [file ...]\n"
"\t%1$s -l\n", getprogname());
exit(1);
}
#define INBUFSIZE 1024
#define OUTBUFSIZE (INBUFSIZE * 2)
static int
do_conv(FILE *fp, iconv_t cd, bool silent, bool hide_invalid)
{
char inbuf[INBUFSIZE], outbuf[OUTBUFSIZE], *in, *out;
unsigned long long invalids;
size_t inbytes, outbytes, ret;
/*
* Don't touch ICONV_SET_DISCARD_ILSEQ if -c wasn't specified. It may
* be that the user has specified //IGNORE in the -t specification, and
* we don't want to clobber that.
*/
if (hide_invalid) {
int arg = (int)hide_invalid;
if (iconvctl(cd, ICONV_SET_DISCARD_ILSEQ, (void *)&arg) == -1)
err(EXIT_FAILURE, "iconvctl(DISCARD_ILSEQ, %d)", arg);
}
invalids = 0;
while ((inbytes = fread(inbuf, 1, INBUFSIZE, fp)) > 0) {
in = inbuf;
while (inbytes > 0) {
size_t inval;
out = outbuf;
outbytes = OUTBUFSIZE;
ret = __iconv(cd, &in, &inbytes, &out, &outbytes,
0, &inval);
invalids += inval;
if (outbytes < OUTBUFSIZE)
(void)fwrite(outbuf, 1, OUTBUFSIZE - outbytes,
stdout);
if (ret == (size_t)-1 && errno != E2BIG) {
if (errno != EINVAL || in == inbuf)
err(EXIT_FAILURE, "iconv()");
/* incomplete input character */
(void)memmove(inbuf, in, inbytes);
ret = fread(inbuf + inbytes, 1,
INBUFSIZE - inbytes, fp);
if (ret == 0) {
fflush(stdout);
if (feof(fp))
errx(EXIT_FAILURE,
"unexpected end of file; "
"the last character is "
"incomplete.");
else
err(EXIT_FAILURE, "fread()");
}
in = inbuf;
inbytes += ret;
}
}
}
/* reset the shift state of the output buffer */
outbytes = OUTBUFSIZE;
out = outbuf;
ret = iconv(cd, NULL, NULL, &out, &outbytes);
if (ret == (size_t)-1)
err(EXIT_FAILURE, "iconv()");
if (outbytes < OUTBUFSIZE)
(void)fwrite(outbuf, 1, OUTBUFSIZE - outbytes, stdout);
if (invalids > 0 && !silent)
warnx("warning: invalid characters: %llu", invalids);
return (invalids > 0);
}
static int
do_list(unsigned int n, const char * const *list, void *data __unused)
{
unsigned int i;
for(i = 0; i < n; i++) {
printf("%s", list[i]);
if (i < n - 1)
printf(" ");
}
printf("\n");
return (1);
}
int
main(int argc, char **argv)
{
iconv_t cd;
FILE *fp;
const char *opt_f, *opt_t;
int ch, i, res;
bool opt_c = false, opt_s = false;
opt_f = opt_t = "";
setlocale(LC_ALL, "");
setprogname(argv[0]);
while ((ch = getopt_long(argc, argv, "csLlf:t:",
long_options, NULL)) != -1) {
switch (ch) {
case 'c':
opt_c = true;
break;
case 's':
opt_s = true;
break;
case 'l':
/* list */
if (opt_s || opt_c || strcmp(opt_f, "") != 0 ||
strcmp(opt_t, "") != 0) {
warnx("-l is not allowed with other flags.");
usage();
}
iconvlist(do_list, NULL);
return (EXIT_SUCCESS);
case 'f':
/* from */
if (optarg != NULL)
opt_f = optarg;
break;
case 't':
/* to */
if (optarg != NULL)
opt_t = optarg;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if ((strcmp(opt_f, "") == 0) && (strcmp(opt_t, "") == 0))
usage();
if (caph_limit_stdio() < 0)
err(EXIT_FAILURE, "capsicum");
/*
* Cache NLS data, for strerror, for err(3), before entering capability
* mode.
*/
caph_cache_catpages();
/*
* Cache iconv conversion handle before entering sandbox.
*/
cd = iconv_open(opt_t, opt_f);
if (cd == (iconv_t)-1)
err(EXIT_FAILURE, "iconv_open(%s, %s)", opt_t, opt_f);
if (argc == 0) {
if (caph_enter() < 0)
err(EXIT_FAILURE, "unable to enter capability mode");
res = do_conv(stdin, cd, opt_s, opt_c);
} else {
res = 0;
for (i = 0; i < argc; i++) {
fp = (strcmp(argv[i], "-") != 0) ?
fopen(argv[i], "r") : stdin;
if (fp == NULL)
err(EXIT_FAILURE, "Cannot open `%s'",
argv[i]);
/* Enter Capsicum sandbox for final input file. */
if (i + 1 == argc && caph_enter() < 0)
err(EXIT_FAILURE,
"unable to enter capability mode");
res |= do_conv(fp, cd, opt_s, opt_c);
(void)fclose(fp);
/* Reset iconv descriptor state. */
(void)iconv(cd, NULL, NULL, NULL, NULL);
}
}
iconv_close(cd);
return (res == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}
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