1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "namespace.h" 33 #include <sys/types.h> 34 #include <sys/stat.h> 35 36 #include <errno.h> 37 #include <fcntl.h> 38 #include <limits.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 #include "un-namespace.h" 43 44 #include "ldpart.h" 45 #include "setlocale.h" 46 47 static int split_lines(char *, const char *); 48 49 int 50 __part_load_locale(const char *name, 51 int *using_locale, 52 char **locale_buf, 53 const char *category_filename, 54 int locale_buf_size_max, 55 int locale_buf_size_min, 56 const char **dst_localebuf) 57 { 58 int saverr, fd, i, num_lines; 59 char *lbuf, *p; 60 const char *plim; 61 char filename[PATH_MAX]; 62 struct stat st; 63 size_t namesize, bufsize; 64 65 /* 'name' must be already checked. */ 66 if (strcmp(name, "C") == 0 || strcmp(name, "POSIX") == 0) { 67 *using_locale = 0; 68 return (_LDP_CACHE); 69 } 70 71 /* 72 * If the locale name is the same as our cache, use the cache. 73 */ 74 if (*locale_buf != NULL && strcmp(name, *locale_buf) == 0) { 75 *using_locale = 1; 76 return (_LDP_CACHE); 77 } 78 79 /* 80 * Slurp the locale file into the cache. 81 */ 82 namesize = strlen(name) + 1; 83 84 /* 'PathLocale' must be already set & checked. */ 85 86 /* Range checking not needed, 'name' size is limited */ 87 strcpy(filename, _PathLocale); 88 strcat(filename, "/"); 89 strcat(filename, name); 90 strcat(filename, "/"); 91 strcat(filename, category_filename); 92 if ((fd = _open(filename, O_RDONLY | O_CLOEXEC)) < 0) 93 return (_LDP_ERROR); 94 if (_fstat(fd, &st) != 0) 95 goto bad_locale; 96 if (st.st_size <= 0) { 97 errno = EFTYPE; 98 goto bad_locale; 99 } 100 bufsize = namesize + st.st_size; 101 if ((lbuf = malloc(bufsize)) == NULL) { 102 errno = ENOMEM; 103 goto bad_locale; 104 } 105 (void)strcpy(lbuf, name); 106 p = lbuf + namesize; 107 plim = p + st.st_size; 108 if (_read(fd, p, (size_t) st.st_size) != st.st_size) 109 goto bad_lbuf; 110 /* 111 * Parse the locale file into localebuf. 112 */ 113 if (plim[-1] != '\n') { 114 errno = EFTYPE; 115 goto bad_lbuf; 116 } 117 num_lines = split_lines(p, plim); 118 if (num_lines >= locale_buf_size_max) 119 num_lines = locale_buf_size_max; 120 else if (num_lines >= locale_buf_size_min) 121 num_lines = locale_buf_size_min; 122 else { 123 errno = EFTYPE; 124 goto bad_lbuf; 125 } 126 (void)_close(fd); 127 /* 128 * Record the successful parse in the cache. 129 */ 130 if (*locale_buf != NULL) 131 free(*locale_buf); 132 *locale_buf = lbuf; 133 for (p = *locale_buf, i = 0; i < num_lines; i++) 134 dst_localebuf[i] = (p += strlen(p) + 1); 135 for (i = num_lines; i < locale_buf_size_max; i++) 136 dst_localebuf[i] = NULL; 137 *using_locale = 1; 138 139 return (_LDP_LOADED); 140 141 bad_lbuf: 142 saverr = errno; 143 free(lbuf); 144 errno = saverr; 145 bad_locale: 146 saverr = errno; 147 (void)_close(fd); 148 errno = saverr; 149 150 return (_LDP_ERROR); 151 } 152 153 static int 154 split_lines(char *p, const char *plim) 155 { 156 int i; 157 158 i = 0; 159 while (p < plim) { 160 if (*p == '\n') { 161 *p = '\0'; 162 i++; 163 } 164 p++; 165 } 166 return (i); 167 } 168 169