IPC fuzzer child process component

base/command_line.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This class works with command lines: building and parsing.
 // Arguments with prefixes ('--', '-', and on Windows, '/') are switches.
 // Switches will precede all other arguments without switch prefixes.
 // Switches can optionally have values, delimited by '=', e.g., "-switch=value".
 // An argument of "--" will terminate switch parsing during initialization,
 // interpreting subsequent tokens as non-switch arguments, regardless of prefix.
@@ skipping 105 matching lines @@
   // Append a switch [with optional value] to the command line.
   // Note: Switches will precede arguments regardless of appending order.
   void AppendSwitch(const std::string& switch_string);
   void AppendSwitchPath(const std::string& switch_string,
                         const base::FilePath& path);
   void AppendSwitchNative(const std::string& switch_string,
                           const StringType& value);
   void AppendSwitchASCII(const std::string& switch_string,
                          const std::string& value);
 
-  // Copy a set of switches (and any values) from another command line.
+  // Copy a switch (and a value, if any) from another command line.
+  void CopySwitchFrom(const CommandLine& source,
+                      const char* switch_name);
+
+  // Same as CopySwitchFrom, but for multiple switches.
   // Commonly used when launching a subprocess.
   void CopySwitchesFrom(const CommandLine& source,

[brettw, 2013/09/03 20:21:18]

I don't think this is a very commonly used function and the existing one isn't
*that* hard to call with only one argument, so my preference would be to keep
the API smaller and just have the one caller of the new one use the existing
version.

                         const char* const switches[],
                         size_t count);
 
   // Get the remaining arguments to the command.
   StringVector GetArgs() const;
 
   // Append an argument to the command line. Note that the argument is quoted
   // properly such that it is interpreted as one argument to the target command.
   // AppendArg is primarily for ASCII; non-ASCII input is interpreted as UTF-8.
   // Note: Switches will precede arguments regardless of appending order.
@@ skipping 30 matching lines @@
   StringVector argv_;
 
   // Parsed-out switch keys and values.
   SwitchMap switches_;
 
   // The index after the program and switches, any arguments start here.
   size_t begin_args_;
 };
 
 #endif  // BASE_COMMAND_LINE_H_