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 <stdlib.h> 35 #include <string.h> 36 #include <unistd.h> 37 #include "un-namespace.h" 38 #include "setlocale.h" 39 #include "ldpart.h" 40 41 static int split_lines(char *, const char *); 42 static void set_from_buf(const char *, int, const char **); 43 44 int 45 __part_load_locale(const char *name, 46 int* using_locale, 47 char *locale_buf, 48 const char *category_name, 49 int locale_buf_size_max, 50 int locale_buf_size_min, 51 const char **dst_localebuf) { 52 53 static char locale_buf_C[] = "C"; 54 static int num_lines; 55 56 int fd; 57 char * lbuf; 58 char * p; 59 const char * plim; 60 char filename[PATH_MAX]; 61 struct stat st; 62 size_t namesize; 63 size_t bufsize; 64 int save_using_locale; 65 66 save_using_locale = *using_locale; 67 *using_locale = 0; 68 69 if (name == NULL) 70 goto no_locale; 71 72 if (!strcmp(name, "C") || !strcmp(name, "POSIX")) 73 return 0; 74 75 /* 76 ** If the locale name is the same as our cache, use the cache. 77 */ 78 lbuf = locale_buf; 79 if (lbuf != NULL && strcmp(name, lbuf) == 0) { 80 set_from_buf(lbuf, num_lines, dst_localebuf); 81 *using_locale = 1; 82 return 0; 83 } 84 /* 85 ** Slurp the locale file into the cache. 86 */ 87 namesize = strlen(name) + 1; 88 89 if (!_PathLocale) 90 goto no_locale; 91 /* Range checking not needed, 'name' size is limited */ 92 strcpy(filename, _PathLocale); 93 strcat(filename, "/"); 94 strcat(filename, name); 95 strcat(filename, "/"); 96 strcat(filename, category_name); 97 fd = _open(filename, O_RDONLY); 98 if (fd < 0) 99 goto no_locale; 100 if (_fstat(fd, &st) != 0) 101 goto bad_locale; 102 if (st.st_size <= 0) 103 goto bad_locale; 104 bufsize = namesize + st.st_size; 105 locale_buf = NULL; 106 lbuf = (lbuf == NULL || lbuf == locale_buf_C) ? 107 malloc(bufsize) : reallocf(lbuf, bufsize); 108 if (lbuf == NULL) 109 goto bad_locale; 110 (void) strcpy(lbuf, name); 111 p = lbuf + namesize; 112 plim = p + st.st_size; 113 if (_read(fd, p, (size_t) st.st_size) != st.st_size) 114 goto bad_lbuf; 115 if (_close(fd) != 0) 116 goto bad_lbuf; 117 /* 118 ** Parse the locale file into localebuf. 119 */ 120 if (plim[-1] != '\n') 121 goto bad_lbuf; 122 num_lines = split_lines(p, plim); 123 if (num_lines >= locale_buf_size_max) 124 num_lines = locale_buf_size_max; 125 else if (num_lines >= locale_buf_size_min) 126 num_lines = locale_buf_size_min; 127 else 128 goto reset_locale; 129 set_from_buf(lbuf, num_lines, dst_localebuf); 130 /* 131 ** Record the successful parse in the cache. 132 */ 133 locale_buf = lbuf; 134 135 *using_locale = 1; 136 return 0; 137 138 reset_locale: 139 locale_buf = locale_buf_C; 140 save_using_locale = 0; 141 bad_lbuf: 142 free(lbuf); 143 bad_locale: 144 (void)_close(fd); 145 no_locale: 146 *using_locale = save_using_locale; 147 return -1; 148 } 149 150 static int 151 split_lines(char *p, const char *plim) 152 { 153 int i; 154 155 for (i = 0; p < plim; i++) { 156 p = strchr(p, '\n'); 157 *p++ = '\0'; 158 } 159 return i; 160 } 161 162 static void 163 set_from_buf(const char *p, int num_lines, const char **dst_localebuf) 164 { 165 const char **ap; 166 int i; 167 168 for (ap = dst_localebuf, i = 0; i < num_lines; ++ap, ++i) 169 *ap = p += strlen(p) + 1; 170 } 171 172