1 /* $FreeBSD$ */ 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 #include <sys/capsicum.h> 34 35 #include <capsicum_helpers.h> 36 #include <err.h> 37 #include <errno.h> 38 #include <getopt.h> 39 #include <iconv.h> 40 #include <limits.h> 41 #include <locale.h> 42 #include <stdbool.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 static int do_conv(FILE *, iconv_t, bool, bool); 49 static int do_list(unsigned int, const char * const *, void *); 50 static void usage(void) __dead2; 51 52 static const struct option long_options[] = { 53 {"from-code", required_argument, NULL, 'f'}, 54 {"list", no_argument, NULL, 'l'}, 55 {"silent", no_argument, NULL, 's'}, 56 {"to-code", required_argument, NULL, 't'}, 57 {NULL, no_argument, NULL, 0} 58 }; 59 60 static void 61 usage(void) 62 { 63 (void)fprintf(stderr, 64 "Usage:\t%1$s [-cs] -f <from_code> -t <to_code> [file ...]\n" 65 "\t%1$s -f <from_code> [-cs] [-t <to_code>] [file ...]\n" 66 "\t%1$s -t <to_code> [-cs] [-f <from_code>] [file ...]\n" 67 "\t%1$s -l\n", getprogname()); 68 exit(1); 69 } 70 71 #define INBUFSIZE 1024 72 #define OUTBUFSIZE (INBUFSIZE * 2) 73 static int 74 do_conv(FILE *fp, iconv_t cd, bool silent, bool hide_invalid) 75 { 76 char inbuf[INBUFSIZE], outbuf[OUTBUFSIZE], *in, *out; 77 unsigned long long invalids; 78 size_t inbytes, outbytes, ret; 79 80 int arg = (int)hide_invalid; 81 if (iconvctl(cd, ICONV_SET_DISCARD_ILSEQ, (void *)&arg) == -1) 82 err(EXIT_FAILURE, "iconvctl(DISCARD_ILSEQ, %d)", arg); 83 84 invalids = 0; 85 while ((inbytes = fread(inbuf, 1, INBUFSIZE, fp)) > 0) { 86 in = inbuf; 87 while (inbytes > 0) { 88 size_t inval; 89 90 out = outbuf; 91 outbytes = OUTBUFSIZE; 92 ret = __iconv(cd, &in, &inbytes, &out, &outbytes, 93 0, &inval); 94 invalids += inval; 95 if (outbytes < OUTBUFSIZE) 96 (void)fwrite(outbuf, 1, OUTBUFSIZE - outbytes, 97 stdout); 98 if (ret == (size_t)-1 && errno != E2BIG) { 99 if (errno != EINVAL || in == inbuf) 100 err(EXIT_FAILURE, "iconv()"); 101 102 /* incomplete input character */ 103 (void)memmove(inbuf, in, inbytes); 104 ret = fread(inbuf + inbytes, 1, 105 INBUFSIZE - inbytes, fp); 106 if (ret == 0) { 107 fflush(stdout); 108 if (feof(fp)) 109 errx(EXIT_FAILURE, 110 "unexpected end of file; " 111 "the last character is " 112 "incomplete."); 113 else 114 err(EXIT_FAILURE, "fread()"); 115 } 116 in = inbuf; 117 inbytes += ret; 118 } 119 } 120 } 121 /* reset the shift state of the output buffer */ 122 outbytes = OUTBUFSIZE; 123 out = outbuf; 124 ret = iconv(cd, NULL, NULL, &out, &outbytes); 125 if (ret == (size_t)-1) 126 err(EXIT_FAILURE, "iconv()"); 127 if (outbytes < OUTBUFSIZE) 128 (void)fwrite(outbuf, 1, OUTBUFSIZE - outbytes, stdout); 129 130 if (invalids > 0 && !silent) 131 warnx("warning: invalid characters: %llu", invalids); 132 133 return (invalids > 0); 134 } 135 136 static int 137 do_list(unsigned int n, const char * const *list, void *data __unused) 138 { 139 unsigned int i; 140 141 for(i = 0; i < n; i++) { 142 printf("%s", list[i]); 143 if (i < n - 1) 144 printf(" "); 145 } 146 printf("\n"); 147 148 return (1); 149 } 150 151 int 152 main(int argc, char **argv) 153 { 154 iconv_t cd; 155 FILE *fp; 156 const char *opt_f, *opt_t; 157 int ch, i, res; 158 bool opt_c = false, opt_s = false; 159 160 opt_f = opt_t = ""; 161 162 setlocale(LC_ALL, ""); 163 setprogname(argv[0]); 164 165 while ((ch = getopt_long(argc, argv, "csLlf:t:", 166 long_options, NULL)) != -1) { 167 switch (ch) { 168 case 'c': 169 opt_c = true; 170 break; 171 case 's': 172 opt_s = true; 173 break; 174 case 'l': 175 /* list */ 176 if (opt_s || opt_c || strcmp(opt_f, "") != 0 || 177 strcmp(opt_t, "") != 0) { 178 warnx("-l is not allowed with other flags."); 179 usage(); 180 } 181 iconvlist(do_list, NULL); 182 return (EXIT_SUCCESS); 183 case 'f': 184 /* from */ 185 if (optarg != NULL) 186 opt_f = optarg; 187 break; 188 case 't': 189 /* to */ 190 if (optarg != NULL) 191 opt_t = optarg; 192 break; 193 default: 194 usage(); 195 } 196 } 197 argc -= optind; 198 argv += optind; 199 if ((strcmp(opt_f, "") == 0) && (strcmp(opt_t, "") == 0)) 200 usage(); 201 202 if (caph_limit_stdio() < 0) 203 err(EXIT_FAILURE, "capsicum"); 204 205 /* 206 * Cache NLS data, for strerror, for err(3), before entering capability 207 * mode. 208 */ 209 caph_cache_catpages(); 210 211 /* 212 * Cache iconv conversion handle before entering sandbox. 213 */ 214 cd = iconv_open(opt_t, opt_f); 215 if (cd == (iconv_t)-1) 216 err(EXIT_FAILURE, "iconv_open(%s, %s)", opt_t, opt_f); 217 218 if (argc == 0) { 219 if (caph_enter() < 0) 220 err(EXIT_FAILURE, "unable to enter capability mode"); 221 res = do_conv(stdin, cd, opt_s, opt_c); 222 } else { 223 res = 0; 224 for (i = 0; i < argc; i++) { 225 fp = (strcmp(argv[i], "-") != 0) ? 226 fopen(argv[i], "r") : stdin; 227 if (fp == NULL) 228 err(EXIT_FAILURE, "Cannot open `%s'", 229 argv[i]); 230 /* Enter Capsicum sandbox for final input file. */ 231 if (i + 1 == argc && caph_enter() < 0) 232 err(EXIT_FAILURE, 233 "unable to enter capability mode"); 234 res |= do_conv(fp, cd, opt_s, opt_c); 235 (void)fclose(fp); 236 237 /* Reset iconv descriptor state. */ 238 (void)iconv(cd, NULL, NULL, NULL, NULL); 239 } 240 } 241 iconv_close(cd); 242 return (res == 0 ? EXIT_SUCCESS : EXIT_FAILURE); 243 } 244