1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #include "namespace.h" 31 #include <sys/types.h> 32 #include <sys/stat.h> 33 34 #include <errno.h> 35 #include <fcntl.h> 36 #include <limits.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 #include "un-namespace.h" 41 42 #include "ldpart.h" 43 #include "setlocale.h" 44 45 static int split_lines(char *, const char *); 46 47 int 48 __part_load_locale(const char *name, 49 int *using_locale, 50 char **locale_buf, 51 const char *category_filename, 52 int locale_buf_size_max, 53 int locale_buf_size_min, 54 const char **dst_localebuf) 55 { 56 int saverr, fd, i, num_lines; 57 char *lbuf, *p; 58 const char *plim; 59 char filename[PATH_MAX]; 60 struct stat st; 61 size_t namesize, bufsize; 62 63 /* 'name' must be already checked. */ 64 if (strcmp(name, "C") == 0 || strcmp(name, "POSIX") == 0 || 65 strncmp(name, "C.", 2) == 0) { 66 *using_locale = 0; 67 return (_LDP_CACHE); 68 } 69 70 /* 71 * If the locale name is the same as our cache, use the cache. 72 */ 73 if (*locale_buf != NULL && strcmp(name, *locale_buf) == 0) { 74 *using_locale = 1; 75 return (_LDP_CACHE); 76 } 77 78 /* 79 * Slurp the locale file into the cache. 80 */ 81 namesize = strlen(name) + 1; 82 83 /* 'PathLocale' must be already set & checked. */ 84 85 /* Range checking not needed, 'name' size is limited */ 86 strcpy(filename, _PathLocale); 87 strcat(filename, "/"); 88 strcat(filename, name); 89 strcat(filename, "/"); 90 strcat(filename, category_filename); 91 if ((fd = _open(filename, O_RDONLY | O_CLOEXEC)) < 0) 92 return (_LDP_ERROR); 93 if (_fstat(fd, &st) != 0) 94 goto bad_locale; 95 if (st.st_size <= 0) { 96 errno = EFTYPE; 97 goto bad_locale; 98 } 99 bufsize = namesize + st.st_size; 100 if ((lbuf = malloc(bufsize)) == NULL) { 101 errno = ENOMEM; 102 goto bad_locale; 103 } 104 (void)strcpy(lbuf, name); 105 p = lbuf + namesize; 106 plim = p + st.st_size; 107 if (_read(fd, p, (size_t) st.st_size) != st.st_size) 108 goto bad_lbuf; 109 /* 110 * Parse the locale file into localebuf. 111 */ 112 if (plim[-1] != '\n') { 113 errno = EFTYPE; 114 goto bad_lbuf; 115 } 116 num_lines = split_lines(p, plim); 117 if (num_lines >= locale_buf_size_max) 118 num_lines = locale_buf_size_max; 119 else if (num_lines >= locale_buf_size_min) 120 num_lines = locale_buf_size_min; 121 else { 122 errno = EFTYPE; 123 goto bad_lbuf; 124 } 125 (void)_close(fd); 126 /* 127 * Record the successful parse in the cache. 128 */ 129 if (*locale_buf != NULL) 130 free(*locale_buf); 131 *locale_buf = lbuf; 132 for (p = *locale_buf, i = 0; i < num_lines; i++) 133 dst_localebuf[i] = (p += strlen(p) + 1); 134 for (i = num_lines; i < locale_buf_size_max; i++) 135 dst_localebuf[i] = NULL; 136 *using_locale = 1; 137 138 return (_LDP_LOADED); 139 140 bad_lbuf: 141 saverr = errno; 142 free(lbuf); 143 errno = saverr; 144 bad_locale: 145 saverr = errno; 146 (void)_close(fd); 147 errno = saverr; 148 149 return (_LDP_ERROR); 150 } 151 152 static int 153 split_lines(char *p, const char *plim) 154 { 155 int i; 156 157 i = 0; 158 while (p < plim) { 159 if (*p == '\n') { 160 *p = '\0'; 161 i++; 162 } 163 p++; 164 } 165 return (i); 166 } 167 168