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config/ConfigFile: use std::exception on syntax error

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This commit is contained in:
Max Kellermann
2015-12-16 11:12:30 +01:00
parent 6717325c3f
commit d256a0e98f
10 changed files with 127 additions and 87 deletions
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17
src/Main.cxx
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@@ -444,11 +444,11 @@ int mpd_main(int argc, char *argv[])
io_thread_init();
config_global_init();
try {
#ifdef ANDROID
(void)argc;
(void)argv;
(void)argc;
(void)argv;
{
const auto sdcard = Environment::getExternalStorageDirectory();
if (!sdcard.IsNull()) {
const auto config_path =
@@ -459,13 +459,16 @@ int mpd_main(int argc, char *argv[])
return EXIT_FAILURE;
}
}
}
#else
if (!parse_cmdline(argc, argv, &options, error)) {
LogError(error);
if (!parse_cmdline(argc, argv, &options, error)) {
LogError(error);
return EXIT_FAILURE;
}
#endif
} catch (const std::exception &e) {
LogError(e);
return EXIT_FAILURE;
}
#endif
#ifdef ENABLE_DAEMON
if (!glue_daemonize_init(&options, error)) {

104
src/config/ConfigFile.cxx
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@@ -27,6 +27,7 @@
#include "util/StringUtil.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
#include "util/RuntimeError.hxx"
#include "fs/Path.hxx"
#include "fs/io/FileReader.hxx"
#include "fs/io/BufferedReader.hxx"
@@ -54,27 +55,20 @@ config_read_name_value(ConfigBlock &block, char *input, unsigned line,
const char *value = tokenizer.NextString(error);
if (value == nullptr) {
if (tokenizer.IsEnd()) {
error.Set(config_file_domain, "Value missing");
} else {
assert(error.IsDefined());
}
if (tokenizer.IsEnd())
throw std::runtime_error("Value missing");
assert(error.IsDefined());
return false;
}
if (!tokenizer.IsEnd() && tokenizer.CurrentChar() != CONF_COMMENT) {
error.Set(config_file_domain, "Unknown tokens after value");
return false;
}
if (!tokenizer.IsEnd() && tokenizer.CurrentChar() != CONF_COMMENT)
throw std::runtime_error("Unknown tokens after value");
const BlockParam *bp = block.GetBlockParam(name);
if (bp != nullptr) {
error.Format(config_file_domain,
"\"%s\" is duplicate, first defined on line %i",
name, bp->line);
return false;
}
if (bp != nullptr)
throw FormatRuntimeError("\"%s\" is duplicate, first defined on line %i",
name, bp->line);
block.AddBlockParam(name, value, line);
return true;
@@ -82,15 +76,14 @@ config_read_name_value(ConfigBlock &block, char *input, unsigned line,
static ConfigBlock *
config_read_block(BufferedReader &reader, Error &error)
{
try {
std::unique_ptr<ConfigBlock> block(new ConfigBlock(reader.GetLineNumber()));
while (true) {
char *line = reader.ReadLine();
if (line == nullptr) {
if (reader.Check(error))
error.Set(config_file_domain,
"Expected '}' before end-of-file");
throw std::runtime_error("Expected '}' before end-of-file");
return nullptr;
}
@@ -103,12 +96,8 @@ config_read_block(BufferedReader &reader, Error &error)
(and from this "while" loop) */
line = StripLeft(line + 1);
if (*line != 0 && *line != CONF_COMMENT) {
error.Format(config_file_domain,
"line %u: Unknown tokens after '}'",
reader.GetLineNumber());
return nullptr;
}
if (*line != 0 && *line != CONF_COMMENT)
throw std::runtime_error("Unknown tokens after '}'");
return block.release();
}
@@ -123,6 +112,8 @@ config_read_block(BufferedReader &reader, Error &error)
return nullptr;
}
}
} catch (...) {
std::throw_with_nested(FormatRuntimeError("Error in line %u", reader.GetLineNumber()));
}
gcc_nonnull_all
@@ -150,30 +141,22 @@ ReadConfigBlock(ConfigData &config_data, BufferedReader &reader,
if (head != nullptr && !option.repeatable) {
ConfigBlock *block = head;
error.Format(config_file_domain,
"config parameter \"%s\" is first defined "
"on line %d and redefined on line %u\n",
name, block->line,
reader.GetLineNumber());
return false;
throw FormatRuntimeError("config parameter \"%s\" is first defined "
"on line %d and redefined on line %u\n",
name, block->line,
reader.GetLineNumber());
}
/* now parse the block or the value */
if (tokenizer.CurrentChar() != '{') {
error.Format(config_file_domain,
"line %u: '{' expected",
reader.GetLineNumber());
return false;
}
if (tokenizer.CurrentChar() != '{')
throw FormatRuntimeError("line %u: '{' expected",
reader.GetLineNumber());
char *line = StripLeft(tokenizer.Rest() + 1);
if (*line != 0 && *line != CONF_COMMENT) {
error.Format(config_file_domain,
"line %u: Unknown tokens after '{'",
reader.GetLineNumber());
return false;
}
if (*line != 0 && *line != CONF_COMMENT)
throw FormatRuntimeError("line %u: Unknown tokens after '{'",
reader.GetLineNumber());
auto *param = config_read_block(reader, error);
if (param == nullptr)
@@ -208,12 +191,10 @@ ReadConfigParam(ConfigData &config_data, BufferedReader &reader,
if (head != nullptr && !option.repeatable) {
struct config_param *param = head;
error.Format(config_file_domain,
"config parameter \"%s\" is first defined "
"on line %d and redefined on line %u\n",
name, param->line,
reader.GetLineNumber());
return false;
throw FormatRuntimeError("config parameter \"%s\" is first defined "
"on line %d and redefined on line %u\n",
name, param->line,
reader.GetLineNumber());
}
/* now parse the block or the value */
@@ -221,23 +202,16 @@ ReadConfigParam(ConfigData &config_data, BufferedReader &reader,
const char *value = tokenizer.NextString(error);
if (value == nullptr) {
if (tokenizer.IsEnd())
error.Format(config_file_domain,
"line %u: Value missing",
reader.GetLineNumber());
else
error.FormatPrefix("line %u: ",
reader.GetLineNumber());
throw FormatRuntimeError("line %u: Value missing",
reader.GetLineNumber());
error.FormatPrefix("line %u: ", reader.GetLineNumber());
return false;
}
if (!tokenizer.IsEnd() &&
tokenizer.CurrentChar() != CONF_COMMENT) {
error.Format(config_file_domain,
"line %u: Unknown tokens after value",
reader.GetLineNumber());
return false;
}
if (!tokenizer.IsEnd() && tokenizer.CurrentChar() != CONF_COMMENT)
throw FormatRuntimeError("line %u: Unknown tokens after value",
reader.GetLineNumber());
auto *param = new config_param(value, reader.GetLineNumber());
Append(head, param);
@@ -281,11 +255,9 @@ ReadConfigFile(ConfigData &config_data, BufferedReader &reader, Error &error)
tokenizer, error))
return false;
} else {
error.Format(config_file_domain,
"unrecognized parameter in config file at "
"line %u: %s\n",
reader.GetLineNumber(), name);
return false;
throw FormatRuntimeError("unrecognized parameter in config file at "
"line %u: %s\n",
reader.GetLineNumber(), name);
}
}
}

45
src/util/RuntimeError.hxx Normal file
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@@ -0,0 +1,45 @@
/*
* Copyright (C) 2013-2015 Max Kellermann <max@duempel.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef RUNTIME_ERROR_HXX
#define RUNTIME_ERROR_HXX
#include <stdexcept>
#include <utility>
template<typename... Args>
static inline std::runtime_error
FormatRuntimeError(const char *fmt, Args&&... args) noexcept
{
char buffer[1024];
snprintf(buffer, sizeof(buffer), fmt, std::forward<Args>(args)...);
return std::runtime_error(buffer);
}
#endif