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system

Abstract

system() executes the specified command.
system() は指定されたコマンドを実行します．

Header file

namespace sstd{
    int system(const        char* cmd);
    int system(const std::string& cmd);

    int system_stdout(std::string& ret, const        char* cmd);
    int system_stdout(std::string& ret, const std::string& cmd);

    int system_stderr(std::string& ret, const        char* cmd);
    int system_stderr(std::string& ret, const std::string& cmd);

    int system_stdout_stderr(std::string& ret, const        char* cmd);
    int system_stdout_stderr(std::string& ret, const std::string& cmd);
}

//-----------------------------------------------------------------------------------------------------------------------------------------------
// Below functions are the not recommended to use. (Below functions will be delete on sstd ver 3.x.x).

namespace sstd{
    std::string system_stdout(const        char* cmd);
    std::string system_stdout(const std::string& cmd);

    std::string system_stderr(const        char* cmd);
    std::string system_stderr(const std::string& cmd);

    std::string system_stdout_stderr(const        char* cmd);
    std::string system_stdout_stderr(const std::string& cmd);
}
//-----------------------------------------------------------------------------------------------------------------------------------------------

Usage

system

  • main.cpp 
    #include <sstd/sstd.hpp>

int main(){
    sstd::system("mkdir -p ./tmp/a/b/c");
    sstd::system("tree ./tmp");
}
  • Execution result 
    ./tmp
└── a
    └── b
        └── c

3 directories, 0 files

system_stdout_stderr

Acquires the stdout and stderr that accompany the execution result.
実行結果に伴う標準出力と標準エラー出力を取得します．

  • main.cpp 
    #include <sstd/sstd.hpp>

int main(){
    sstd::system("touch hello");
    sstd::system("touch system_stdout_stderr");

    int ret;
    std::string ret_s;
    ret = sstd::system_stdout_stderr(ret_s, "ls");
    sstd::printn( WEXITSTATUS(ret) );
    sstd::printn( ret_s );
}
  • Execution result 
    WEXITSTATUS(ret) = 0
ret_s = "hello
sstd
system_stdout_stderr
"

Implementation