| 1 | /* |
| 2 | * inih -- simple .INI file parser |
| 3 | * |
| 4 | * The "inih" library is distributed under the New BSD license: |
| 5 | * |
| 6 | * Copyright (C) 2009 Brush Technology - All rights reserved. |
| 7 | * |
| 8 | * SPDX-License-Identifier: BSD-3-Clause |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions are met: |
| 12 | * |
| 13 | * * Redistributions of source code must retain the above copyright notice, |
| 14 | * this list of conditions and the following disclaimer. |
| 15 | * * Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * * Neither the name of Brush Technology nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY BRUSH TECHNOLOGY ''AS IS'' AND ANY EXPRESS OR |
| 23 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| 25 | * EVENT SHALL BRUSH TECHNOLOGY BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 26 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 27 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 28 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 29 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 30 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 31 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | * |
| 33 | * http://code.google.com/p/inih/ |
| 34 | */ |
| 35 | |
| 36 | #include <stdio.h> |
| 37 | #include <ctype.h> |
| 38 | #include <string.h> |
| 39 | #include <common/common.h> |
| 40 | |
| 41 | #include "ini.h" |
| 42 | |
| 43 | #if !INI_USE_STACK |
| 44 | #include <stdlib.h> |
| 45 | #endif |
| 46 | |
| 47 | #define MAX_SECTION 50 |
| 48 | #define MAX_NAME 50 |
| 49 | |
| 50 | /* Strip whitespace chars off end of given string, in place. Return s. */ |
| 51 | static char* rstrip(char* s) |
| 52 | { |
| 53 | char* p = s + strlen(s); |
| 54 | |
| 55 | while (p > s && isspace((unsigned char)(*--p))) |
| 56 | *p = '\0'; |
| 57 | return s; |
| 58 | } |
| 59 | |
| 60 | /* Return pointer to first non-whitespace char in given string. */ |
| 61 | static char* lskip(const char* s) |
| 62 | { |
| 63 | while (*s && isspace((unsigned char)(*s))) |
| 64 | s++; |
| 65 | return (char*)s; |
| 66 | } |
| 67 | |
| 68 | /* |
| 69 | * Return pointer to first char c or ';' comment in given string, or pointer to |
| 70 | * null at end of string if neither found. ';' must be prefixed by a whitespace |
| 71 | * character to register as a comment. |
| 72 | */ |
| 73 | static char* find_char_or_comment(const char* s, char c) |
| 74 | { |
| 75 | int was_whitespace = 0; |
| 76 | |
| 77 | while (*s && *s != c && !(was_whitespace && *s == ';')) { |
| 78 | was_whitespace = isspace((unsigned char)(*s)); |
| 79 | s++; |
| 80 | } |
| 81 | return (char*)s; |
| 82 | } |
| 83 | |
| 84 | /* Version of strncpy that ensures dest (size bytes) is null-terminated. */ |
| 85 | static char* strncpy0(char* dest, const char* src, size_t size) |
| 86 | { |
| 87 | strncpy(dest, src, size - 1); |
| 88 | dest[size - 1] = '\0'; |
| 89 | return dest; |
| 90 | } |
| 91 | |
| 92 | /* See documentation in header file. */ |
| 93 | LTTNG_HIDDEN |
| 94 | int ini_parse_file(FILE* file, ini_entry_handler handler, void* user) |
| 95 | { |
| 96 | /* Uses a fair bit of stack (use heap instead if you need to) */ |
| 97 | #if INI_USE_STACK |
| 98 | char line[INI_MAX_LINE]; |
| 99 | #else |
| 100 | char* line; |
| 101 | #endif |
| 102 | char section[MAX_SECTION] = ""; |
| 103 | char prev_name[MAX_NAME] = ""; |
| 104 | |
| 105 | char* start; |
| 106 | char* end; |
| 107 | char* name; |
| 108 | char* value; |
| 109 | int lineno = 0; |
| 110 | int error = 0; |
| 111 | |
| 112 | #if !INI_USE_STACK |
| 113 | line = (char*)zmalloc(INI_MAX_LINE); |
| 114 | if (!line) { |
| 115 | return -2; |
| 116 | } |
| 117 | #endif |
| 118 | |
| 119 | /* Scan through file line by line */ |
| 120 | while (fgets(line, INI_MAX_LINE, file) != NULL) { |
| 121 | lineno++; |
| 122 | |
| 123 | start = line; |
| 124 | #if INI_ALLOW_BOM |
| 125 | if (lineno == 1 && (unsigned char)start[0] == 0xEF && |
| 126 | (unsigned char)start[1] == 0xBB && |
| 127 | (unsigned char)start[2] == 0xBF) { |
| 128 | start += 3; |
| 129 | } |
| 130 | #endif |
| 131 | start = lskip(rstrip(start)); |
| 132 | |
| 133 | if (*start == ';' || *start == '#') { |
| 134 | /* |
| 135 | * Per Python ConfigParser, allow '#' comments at |
| 136 | * start of line. |
| 137 | */ |
| 138 | } |
| 139 | #if INI_ALLOW_MULTILINE |
| 140 | else if (*prev_name && *start && start > line) { |
| 141 | /* Non-black line with leading whitespace, treat as |
| 142 | * continuation of previous name's value |
| 143 | * (as per Python ConfigParser). |
| 144 | */ |
| 145 | if (handler(user, section, prev_name, start) < 0 && |
| 146 | !error) { |
| 147 | error = lineno; |
| 148 | } |
| 149 | } |
| 150 | #endif |
| 151 | else if (*start == '[') { |
| 152 | /* A "[section]" line */ |
| 153 | end = find_char_or_comment(start + 1, ']'); |
| 154 | if (*end == ']') { |
| 155 | *end = '\0'; |
| 156 | strncpy0(section, start + 1, sizeof(section)); |
| 157 | *prev_name = '\0'; |
| 158 | } |
| 159 | else if (!error) { |
| 160 | /* No ']' found on section line */ |
| 161 | error = lineno; |
| 162 | } |
| 163 | } |
| 164 | else if (*start && *start != ';') { |
| 165 | /* Not a comment, must be a name[=:]value pair */ |
| 166 | end = find_char_or_comment(start, '='); |
| 167 | if (*end != '=') { |
| 168 | end = find_char_or_comment(start, ':'); |
| 169 | } |
| 170 | if (*end == '=' || *end == ':') { |
| 171 | *end = '\0'; |
| 172 | name = rstrip(start); |
| 173 | value = lskip(end + 1); |
| 174 | end = find_char_or_comment(value, '\0'); |
| 175 | if (*end == ';') { |
| 176 | *end = '\0'; |
| 177 | } |
| 178 | |
| 179 | rstrip(value); |
| 180 | |
| 181 | /* |
| 182 | * Valid name[=:]value pair found, call |
| 183 | * handler |
| 184 | */ |
| 185 | strncpy0(prev_name, name, sizeof(prev_name)); |
| 186 | if (handler(user, section, name, value) < 0 && |
| 187 | !error) { |
| 188 | error = lineno; |
| 189 | } |
| 190 | } |
| 191 | else if (!error) { |
| 192 | /* No '=' or ':' found on name[=:]value line */ |
| 193 | error = lineno; |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | #if !INI_USE_STACK |
| 199 | free(line); |
| 200 | #endif |
| 201 | |
| 202 | return error; |
| 203 | } |
| 204 | |
| 205 | /* See documentation in header file. */ |
| 206 | LTTNG_HIDDEN |
| 207 | int ini_parse(const char* filename, ini_entry_handler handler, void* user) |
| 208 | { |
| 209 | FILE* file; |
| 210 | int error; |
| 211 | |
| 212 | file = fopen(filename, "r"); |
| 213 | if (!file) { |
| 214 | return -1; |
| 215 | } |
| 216 | |
| 217 | error = ini_parse_file(file, handler, user); |
| 218 | fclose(file); |
| 219 | return error; |
| 220 | } |