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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "namespace.h" 31 #include <sys/types.h> 32 #include <sys/stat.h> 33 #include <sys/syslimits.h> 34 #include <errno.h> 35 #include <fcntl.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <unistd.h> 39 #include "un-namespace.h" 40 41 #include "setlocale.h" 42 #include "ldpart.h" 43 44 static int split_lines(char *, const char *); 45 46 int 47 __part_load_locale(const char *name, 48 int *using_locale, 49 char *locale_buf, 50 const char *category_filename, 51 int locale_buf_size_max, 52 int locale_buf_size_min, 53 const char **dst_localebuf) 54 { 55 int saverr, fd, i, num_lines; 56 char *lbuf, *p; 57 const char *plim; 58 char filename[PATH_MAX]; 59 struct stat st; 60 size_t namesize, bufsize; 61 62 /* 'name' must be already checked. */ 63 if (strcmp(name, "C") == 0 || strcmp(name, "POSIX") == 0) { 64 *using_locale = 0; 65 return (_LDP_CACHE); 66 } 67 68 /* 69 * If the locale name is the same as our cache, use the cache. 70 */ 71 if (locale_buf != NULL && strcmp(name, locale_buf) == 0) { 72 *using_locale = 1; 73 return (_LDP_CACHE); 74 } 75 76 /* 77 * Slurp the locale file into the cache. 78 */ 79 namesize = strlen(name) + 1; 80 81 /* 'PathLocale' must be already set & checked. */ 82 /* Range checking not needed, 'name' size is limited */ 83 strcpy(filename, _PathLocale); 84 strcat(filename, "/"); 85 strcat(filename, name); 86 strcat(filename, "/"); 87 strcat(filename, category_filename); 88 if ((fd = _open(filename, O_RDONLY)) < 0) 89 return (_LDP_ERROR); 90 if (_fstat(fd, &st) != 0) 91 goto bad_locale; 92 if (st.st_size <= 0) { 93 errno = EFTYPE; 94 goto bad_locale; 95 } 96 bufsize = namesize + st.st_size; 97 if ((lbuf = malloc(bufsize)) == NULL) { 98 errno = ENOMEM; 99 goto bad_locale; 100 } 101 (void)strcpy(lbuf, name); 102 p = lbuf + namesize; 103 plim = p + st.st_size; 104 if (_read(fd, p, (size_t) st.st_size) != st.st_size) 105 goto bad_lbuf; 106 /* 107 * Parse the locale file into localebuf. 108 */ 109 if (plim[-1] != '\n') { 110 errno = EFTYPE; 111 goto bad_lbuf; 112 } 113 num_lines = split_lines(p, plim); 114 if (num_lines >= locale_buf_size_max) 115 num_lines = locale_buf_size_max; 116 else if (num_lines >= locale_buf_size_min) 117 num_lines = locale_buf_size_min; 118 else { 119 errno = EFTYPE; 120 goto bad_lbuf; 121 } 122 (void)_close(fd); 123 /* 124 * Record the successful parse in the cache. 125 */ 126 if (locale_buf != NULL) 127 free(locale_buf); 128 locale_buf = lbuf; 129 for (p = locale_buf, i = 0; i < num_lines; i++) 130 dst_localebuf[i] = (p += strlen(p) + 1); 131 for (i = num_lines; i < locale_buf_size_max; i++) 132 dst_localebuf[i] = NULL; 133 *using_locale = 1; 134 135 return (_LDP_LOADED); 136 137 bad_lbuf: 138 saverr = errno; 139 free(lbuf); 140 errno = saverr; 141 bad_locale: 142 saverr = errno; 143 (void)_close(fd); 144 errno = saverr; 145 146 return (_LDP_ERROR); 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