SlHelpers::Process Class Reference

Creates a process and executes a program. More...

#include <Process.h>

Public Types
enum	Error {   UnknownError , BusyError , PipeError , SpawnError ,   WaitPidError , ReadError , WriteError }
	Errors returned by lastErrorNo().

Public Member Functions
bool	run (const std::filesystem::path &program, const std::vector< std::string > &args={}, std::string *out=nullptr)
	Spawns a process, executes program with args, and waits for its termination.
bool	spawn (const std::filesystem::path &program, const std::vector< std::string > &args={}, bool captureStdout=false)
	Forks a process and executes program with args.
bool	readAll (std::string &out)
	Read everything from process' stdout.
int	readPipe () const
	Get the stdout pipe of the process.
bool	waitForFinished ()
	Wait until the underlying process is finished (or dead).
bool	kill (int sig)
	Send a signal sig to the process.
pid_t	pid () const
	Return the process ID for the child process.
bool	signalled () const
	Was the child signalled?
unsigned int	exitStatus () const
	Exit status of the children (aka WEXITSTATUS()).
const std::string &	lastError () const
	Return the last error string if some.
Error	lastErrorNo () const
	Return the last error number.

Detailed Description

Creates a process and executes a program.

Member Function Documentation

exitStatus()

unsigned int SlHelpers::Process::exitStatus ( ) const

inline

Exit status of the children (aka WEXITSTATUS()).

Returns

Exit status.

pid()

pid_t SlHelpers::Process::pid ( ) const

inline

Return the process ID for the child process.

Returns

PID

readAll()

bool SlHelpers::Process::readAll

(

std::string &

out

)

Read everything from process' stdout.

Parameters

out	Where to read to

Returns

true on success.

readPipe()

int SlHelpers::Process::readPipe ( ) const

inline

Get the stdout pipe of the process.

Returns

Pipe file descriptor.

run()

bool SlHelpers::Process::run	(	const std::filesystem::path &	program,
		const std::vector< std::string > &	args = {},
		std::string *	out = nullptr )

Spawns a process, executes program with args, and waits for its termination.

Parameters

program	Program to execute
args	Arguments passed to the program (do not add program itself)
out	stdout of the program

Returns

zero on success

If out is non-NULL, the stdout of the program is filled in there. run() combines spawn(), readAll(), and waitForFinished().

signalled()

bool SlHelpers::Process::signalled ( ) const

inline

Was the child signalled?

Returns

true if signalled.

spawn()

bool SlHelpers::Process::spawn	(	const std::filesystem::path &	program,
		const std::vector< std::string > &	args = {},
		bool	captureStdout = false )

Forks a process and executes program with args.

Parameters

program	Program to run
args	Arguments to pass to program
captureStdout	Stdout of the program. If nullptr, output is discarded

Returns

true on success.

waitForFinished()

bool SlHelpers::Process::waitForFinished

(

)

Wait until the underlying process is finished (or dead).

Returns

true on success.

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

• /home/abuild/rpmbuild/BUILD/slhelpers-20260428.f233ce9-build/slhelpers-20260428.f233ce9/include/helpers/Process.h