77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
/*
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* Copyright (c) 2018 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2022-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#pragma once
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#include <maxscale/ccdefs.hh>
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#include <functional>
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#include <memory>
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#include <unistd.h>
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class ExternalCmd
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{
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public:
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/**
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* Create a new external command. The name and parameters are copied so
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* the original memory can be freed.
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*
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* @param argstr Command to execute with the parameters
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* @param timeout Command timeout in seconds
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* @return Pointer to new external command struct or NULL if an error occurred
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*/
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static std::unique_ptr<ExternalCmd> create(const std::string& argstr, int timeout);
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/**
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* Execute a command
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*
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* The output of the command must be freed by the caller by calling MXS_FREE.
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*
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* @return The return value of the executed command or -1 on error
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*/
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int externcmd_execute();
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/**
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* If keyword is found in command script, replace keyword with output of generator function.
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*
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* @param keyword Keyword to replace
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* @param generator Function which generates the replacement string. Only ran if keyword was found.
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*/
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void match_substitute(const std::string& keyword, const std::function<std::string(void)>& generator);
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/**
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* Reset substituted command to the unaltered command. Should be ran before a substitution pass begins.
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*/
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void reset_substituted();
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const char* substituted() const;
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private:
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static const int MAX_ARGS {256};
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std::string m_orig_command; /**< Original command */
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std::string m_subst_command; /**< Command with substitutions */
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int m_timeout; /**< Command timeout in seconds */
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ExternalCmd(const std::string& script, int timeout);
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int tokenize_args(char* dest[], int dest_size);
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/**
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* Substitute all occurrences of @c match with @c replace in the arguments.
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*
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* @param match Match string
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* @param replace Replacement string
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*/
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void substitute_arg(const std::string& match, const std::string& replace);
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};
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