1 /* 2 * Copyright (c) 2000, 2001 Alexey Zelkin 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 * $FreeBSD$ 27 */ 28 29 #include "namespace.h" 30 #include <sys/types.h> 31 #include <sys/stat.h> 32 #include <sys/syslimits.h> 33 #include <fcntl.h> 34 #include "un-namespace.h" 35 #include <stdlib.h> 36 #include <string.h> 37 #include "setlocale.h" 38 #include "ldpart.h" 39 40 static int split_lines(char *, const char *); 41 static void set_from_buf(const char *, int, const char **); 42 43 int 44 __part_load_locale(const char *name, 45 int* using_locale, 46 char *locale_buf, 47 const char *category_name, 48 int locale_buf_size_max, 49 int locale_buf_size_min, 50 const char **dst_localebuf) { 51 52 static char locale_buf_C[] = "C"; 53 static int num_lines; 54 55 int fd; 56 char * lbuf; 57 char * p; 58 const char * plim; 59 char filename[PATH_MAX]; 60 struct stat st; 61 size_t namesize; 62 size_t bufsize; 63 int save_using_locale; 64 65 save_using_locale = *using_locale; 66 *using_locale = 0; 67 68 if (name == NULL) 69 goto no_locale; 70 71 if (!strcmp(name, "C") || !strcmp(name, "POSIX")) 72 return 0; 73 74 /* 75 ** If the locale name is the same as our cache, use the cache. 76 */ 77 lbuf = locale_buf; 78 if (lbuf != NULL && strcmp(name, lbuf) == 0) { 79 set_from_buf(lbuf, num_lines, dst_localebuf); 80 *using_locale = 1; 81 return 0; 82 } 83 /* 84 ** Slurp the locale file into the cache. 85 */ 86 namesize = strlen(name) + 1; 87 88 if (!_PathLocale) 89 goto no_locale; 90 /* Range checking not needed, 'name' size is limited */ 91 strcpy(filename, _PathLocale); 92 strcat(filename, "/"); 93 strcat(filename, name); 94 strcat(filename, "/"); 95 strcat(filename, category_name); 96 fd = _open(filename, O_RDONLY); 97 if (fd < 0) 98 goto no_locale; 99 if (_fstat(fd, &st) != 0) 100 goto bad_locale; 101 if (st.st_size <= 0) 102 goto bad_locale; 103 bufsize = namesize + st.st_size; 104 locale_buf = NULL; 105 lbuf = (lbuf == NULL || lbuf == locale_buf_C) ? 106 malloc(bufsize) : reallocf(lbuf, bufsize); 107 if (lbuf == NULL) 108 goto bad_locale; 109 (void) strcpy(lbuf, name); 110 p = lbuf + namesize; 111 plim = p + st.st_size; 112 if (_read(fd, p, (size_t) st.st_size) != st.st_size) 113 goto bad_lbuf; 114 if (_close(fd) != 0) 115 goto bad_lbuf; 116 /* 117 ** Parse the locale file into localebuf. 118 */ 119 if (plim[-1] != '\n') 120 goto bad_lbuf; 121 num_lines = split_lines(p, plim); 122 if (num_lines >= locale_buf_size_max) 123 num_lines = locale_buf_size_max; 124 else if (num_lines >= locale_buf_size_min) 125 num_lines = locale_buf_size_min; 126 else 127 goto reset_locale; 128 set_from_buf(lbuf, num_lines, dst_localebuf); 129 /* 130 ** Record the successful parse in the cache. 131 */ 132 locale_buf = lbuf; 133 134 *using_locale = 1; 135 return 0; 136 137 reset_locale: 138 locale_buf = locale_buf_C; 139 save_using_locale = 0; 140 bad_lbuf: 141 free(lbuf); 142 bad_locale: 143 (void)_close(fd); 144 no_locale: 145 *using_locale = save_using_locale; 146 return -1; 147 } 148 149 static int 150 split_lines(char *p, const char *plim) 151 { 152 int i; 153 154 for (i = 0; p < plim; i++) { 155 p = strchr(p, '\n'); 156 *p++ = '\0'; 157 } 158 return i; 159 } 160 161 static void 162 set_from_buf(const char *p, int num_lines, const char **dst_localebuf) 163 { 164 const char **ap; 165 int i; 166 167 for (ap = dst_localebuf, i = 0; i < num_lines; ++ap, ++i) 168 *ap = p += strlen(p) + 1; 169 } 170 171