1 /* 2 * Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/lib/libc/locale/ldpart.c 241046 2012-09-29 11:54:34Z jilles $ 27 */ 28 29 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 *using_locale = 0; 66 return (_LDP_CACHE); 67 } 68 69 /* 70 * If the locale name is the same as our cache, use the cache. 71 */ 72 if (*locale_buf != NULL && strcmp(name, *locale_buf) == 0) { 73 *using_locale = 1; 74 return (_LDP_CACHE); 75 } 76 77 /* 78 * Slurp the locale file into the cache. 79 */ 80 namesize = strlen(name) + 1; 81 82 /* 'PathLocale' must be already set & checked. */ 83 84 /* Range checking not needed, 'name' size is limited */ 85 strcpy(filename, _PathLocale); 86 strcat(filename, "/"); 87 strcat(filename, name); 88 strcat(filename, "/"); 89 strcat(filename, category_filename); 90 if ((fd = _open(filename, O_RDONLY | O_CLOEXEC)) < 0) 91 return (_LDP_ERROR); 92 if (_fstat(fd, &st) != 0) 93 goto bad_locale; 94 if (st.st_size <= 0) { 95 errno = EFTYPE; 96 goto bad_locale; 97 } 98 bufsize = namesize + st.st_size; 99 if ((lbuf = malloc(bufsize)) == NULL) { 100 errno = ENOMEM; 101 goto bad_locale; 102 } 103 (void)strcpy(lbuf, name); 104 p = lbuf + namesize; 105 plim = p + st.st_size; 106 if (_read(fd, p, (size_t) st.st_size) != st.st_size) 107 goto bad_lbuf; 108 /* 109 * Parse the locale file into localebuf. 110 */ 111 if (plim[-1] != '\n') { 112 errno = EFTYPE; 113 goto bad_lbuf; 114 } 115 num_lines = split_lines(p, plim); 116 if (num_lines >= locale_buf_size_max) 117 num_lines = locale_buf_size_max; 118 else if (num_lines >= locale_buf_size_min) 119 num_lines = locale_buf_size_min; 120 else { 121 errno = EFTYPE; 122 goto bad_lbuf; 123 } 124 (void)_close(fd); 125 /* 126 * Record the successful parse in the cache. 127 */ 128 if (*locale_buf != NULL) 129 free(*locale_buf); 130 *locale_buf = lbuf; 131 for (p = *locale_buf, i = 0; i < num_lines; i++) 132 dst_localebuf[i] = (p += strlen(p) + 1); 133 for (i = num_lines; i < locale_buf_size_max; i++) 134 dst_localebuf[i] = NULL; 135 *using_locale = 1; 136 137 return (_LDP_LOADED); 138 139 bad_lbuf: 140 saverr = errno; 141 free(lbuf); 142 errno = saverr; 143 bad_locale: 144 saverr = errno; 145 (void)_close(fd); 146 errno = saverr; 147 148 return (_LDP_ERROR); 149 } 150 151 static int 152 split_lines(char *p, const char *plim) 153 { 154 int i; 155 156 i = 0; 157 while (p < plim) { 158 if (*p == '\n') { 159 *p = '\0'; 160 i++; 161 } 162 p++; 163 } 164 return (i); 165 } 166 167