Implement the mecanism to spawn a program. More...

#include <Spawn.hpp>

Inheritance diagram for Spawn:

Collaboration diagram for Spawn:

Public Member Functions
	Spawn ()

	~Spawn () override=default

void	execute (const std::string &args) override
	Spawn a program using the command arguments Double fork to avoid zombie processes Parse the command arguments to get the program name and its arguments use of execvp to execute the command so it will search the bin using PATH throw an exception if the command fails. More...

Detailed Description

Implement the mecanism to spawn a program.

Constructor & Destructor Documentation

◆ Spawn()

Spawn::Spawn ( )

default

◆ ~Spawn()

Spawn::~Spawn ( )

overridedefault

Member Function Documentation

◆ execute()

void Spawn::execute ( const std::string & args )

overridevirtual

Spawn a program using the command arguments Double fork to avoid zombie processes Parse the command arguments to get the program name and its arguments use of execvp to execute the command so it will search the bin using PATH throw an exception if the command fails.

Parameters

args	the first word separated by a space is the binary name, the rest is the arguments

Implements CommandBase.

                                          {
     std::istringstream iss(args);
     std::string command;
     iss >> command;
     std::vector<const char*> argv;
     argv.push_back(command.c_str());
     std::string arg;
     while (iss >> arg) {
         argv.push_back(arg.c_str());
     }
     argv.push_back(nullptr);
     pid_t pid = fork();
     if (pid < 0) {
         throw std::runtime_error("Fork failed: " + std::string(strerror(errno)));
     } else if (pid == 0) {
         pid_t pid_inner = fork();
         if (pid_inner < 0) {
             exit(EXIT_FAILURE);
         } else if (pid_inner == 0) {
             execvp(command.c_str(), const_cast<char* const*>(argv.data()));
             Logger::GetInstance()->Log("Failed to execute command \""
                                         + command
                                         + "\": "
                                         + strerror(errno),L_ERROR);
             exit(EXIT_FAILURE);
         }
         exit(EXIT_SUCCESS);
     } else {
         waitpid(pid, nullptr, 0);
     }
     Logger::GetInstance()->Log("Succefully launched " + args,L_INFO);
 }

References Logger::GetInstance(), L_ERROR, L_INFO, and Logger::Log().

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The documentation for this class was generated from the following files: