1 /* $NetBSD: iconv.c,v 1.16 2009/02/20 15:28:21 yamt Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c)2003 Citrus Project, 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/capsicum.h> 32 33 #include <capsicum_helpers.h> 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 46 static int do_conv(FILE *, iconv_t, bool, bool); 47 static int do_list(unsigned int, const char * const *, void *); 48 static void usage(void) __dead2; 49 50 static 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 58 static void 59 usage(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) 71 static int 72 do_conv(FILE *fp, iconv_t cd, bool silent, bool hide_invalid) 73 { 74 char inbuf[INBUFSIZE], outbuf[OUTBUFSIZE], *in, *out; 75 unsigned long long invalids; 76 size_t inbytes, outbytes, ret; 77 78 /* 79 * Don't touch ICONV_SET_DISCARD_ILSEQ if -c wasn't specified. It may 80 * be that the user has specified //IGNORE in the -t specification, and 81 * we don't want to clobber that. 82 */ 83 if (hide_invalid) { 84 int arg = (int)hide_invalid; 85 if (iconvctl(cd, ICONV_SET_DISCARD_ILSEQ, (void *)&arg) == -1) 86 err(EXIT_FAILURE, "iconvctl(DISCARD_ILSEQ, %d)", arg); 87 } 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 return (invalids > 0); 139 } 140 141 static int 142 do_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 } 155 156 int 157 main(int argc, char **argv) 158 { 159 iconv_t cd; 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(); 206 207 if (caph_limit_stdio() < 0) 208 err(EXIT_FAILURE, "capsicum"); 209 210 /* 211 * Cache NLS data, for strerror, for err(3), before entering capability 212 * mode. 213 */ 214 caph_cache_catpages(); 215 216 /* 217 * Cache iconv conversion handle before entering sandbox. 218 */ 219 cd = iconv_open(opt_t, opt_f); 220 if (cd == (iconv_t)-1) 221 err(EXIT_FAILURE, "iconv_open(%s, %s)", opt_t, opt_f); 222 223 if (argc == 0) { 224 if (caph_enter() < 0) 225 err(EXIT_FAILURE, "unable to enter capability mode"); 226 res = do_conv(stdin, cd, opt_s, opt_c); 227 } else { 228 res = 0; 229 for (i = 0; i < argc; i++) { 230 fp = (strcmp(argv[i], "-") != 0) ? 231 fopen(argv[i], "r") : stdin; 232 if (fp == NULL) 233 err(EXIT_FAILURE, "Cannot open `%s'", 234 argv[i]); 235 /* Enter Capsicum sandbox for final input file. */ 236 if (i + 1 == argc && caph_enter() < 0) 237 err(EXIT_FAILURE, 238 "unable to enter capability mode"); 239 res |= do_conv(fp, cd, opt_s, opt_c); 240 (void)fclose(fp); 241 242 /* Reset iconv descriptor state. */ 243 (void)iconv(cd, NULL, NULL, NULL, NULL); 244 } 245 } 246 iconv_close(cd); 247 return (res == 0 ? EXIT_SUCCESS : EXIT_FAILURE); 248 } 249