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added process

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This commit is contained in:
Alejandro Cervera
2026-09-07 15:24:52 -06:00
parent bdade6bc27
commit 8f895f0757
6 changed files with 420 additions and 42 deletions
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desktoplib.code-workspace
+1 -1
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@@ -5,6 +5,6 @@
}
],
"settings": {
"terminal.integrated.defaultProfile.windows": "MSYS2 UCRT",
"terminal.integrated.defaultProfile.windows": "MSYS2 UCRT"
}
}
src/desktoplib/os/common_proc.hpp
+33
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@@ -0,0 +1,33 @@
#pragma once
#include <string>
#include <string_view>
#include <vector>
namespace ckitty {
namespace proc {
namespace os {
struct ProcessInfo;
ProcessInfo* createProcess(const std::string& exec, const std::vector<std::string>& args);
void destroyProcess(ProcessInfo* info);
bool isRunning(ProcessInfo* info);
int getExitCode(ProcessInfo* info);
void writeInput(ProcessInfo* info, std::string_view data);
std::string readOutput(ProcessInfo* info);
std::string readError(ProcessInfo* info);
}
}
}
src/desktoplib/os/unix_proc.cpp
+154
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@@ -0,0 +1,154 @@
#if defined(__unix__) || defined(__APPLE__) || defined(__linux__)
#include "common_proc.hpp"
#include <unistd.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <signal.h>
#include <vector>
#include <string>
#include <cstring>
namespace ckitty {
namespace proc {
namespace os {
struct ProcessInfo {
pid_t pid = -1;
int stdin_fd = -1;
int stdout_fd = -1;
int stderr_fd = -1;
bool running = false;
std::string output;
std::string error;
};
ProcessInfo* createProcess(const std::string& exec, const std::vector<std::string>& args) {
int stdin_pipe[2], stdout_pipe[2], stderr_pipe[2];
if (pipe(stdin_pipe) != 0) return nullptr;
if (pipe(stdout_pipe) != 0) { close(stdin_pipe[0]); close(stdin_pipe[1]); return nullptr; }
if (pipe(stderr_pipe) != 0) { close(stdin_pipe[0]); close(stdin_pipe[1]); close(stdout_pipe[0]); close(stdout_pipe[1]); return nullptr; }
pid_t pid = fork();
if (pid == 0) {
close(stdin_pipe[1]);
close(stdout_pipe[0]);
close(stderr_pipe[0]);
dup2(stdin_pipe[0], STDIN_FILENO);
dup2(stdout_pipe[1], STDOUT_FILENO);
dup2(stderr_pipe[1], STDERR_FILENO);
close(stdin_pipe[0]);
close(stdout_pipe[1]);
close(stderr_pipe[1]);
std::vector<char*> argv;
argv.push_back(const_cast<char*>(exec.c_str()));
for (const auto& arg : args) {
argv.push_back(const_cast<char*>(arg.c_str()));
}
argv.push_back(nullptr);
execvp(argv[0], argv.data());
_exit(127);
}
if (pid < 0) {
close(stdin_pipe[0]); close(stdin_pipe[1]);
close(stdout_pipe[0]); close(stdout_pipe[1]);
close(stderr_pipe[0]); close(stderr_pipe[1]);
return nullptr;
}
close(stdin_pipe[0]);
close(stdout_pipe[1]);
close(stderr_pipe[1]);
int flags = fcntl(stdout_pipe[0], F_GETFL, 0);
fcntl(stdout_pipe[0], F_SETFL, flags | O_NONBLOCK);
flags = fcntl(stderr_pipe[0], F_GETFL, 0);
fcntl(stderr_pipe[0], F_SETFL, flags | O_NONBLOCK);
auto* info = new ProcessInfo();
info->pid = pid;
info->stdin_fd = stdin_pipe[1];
info->stdout_fd = stdout_pipe[0];
info->stderr_fd = stderr_pipe[0];
info->running = true;
return info;
}
void destroyProcess(ProcessInfo* info) {
if (!info) return;
if (info->running) {
kill(info->pid, SIGKILL);
waitpid(info->pid, nullptr, 0);
}
if (info->stdin_fd != -1) close(info->stdin_fd);
if (info->stdout_fd != -1) close(info->stdout_fd);
if (info->stderr_fd != -1) close(info->stderr_fd);
delete info;
}
bool isRunning(ProcessInfo* info) {
if (!info || !info->running) return false;
int status = 0;
pid_t result = waitpid(info->pid, &status, WNOHANG);
if (result == info->pid) {
info->running = false;
char buf[4096];
ssize_t n;
while ((n = read(info->stdout_fd, buf, sizeof(buf))) > 0) {
info->output.append(buf, n);
}
while ((n = read(info->stderr_fd, buf, sizeof(buf))) > 0) {
info->error.append(buf, n);
}
return false;
}
return true;
}
int getExitCode(ProcessInfo* info) {
if (!info) return 0;
if (info->running) return 0;
int status = 0;
waitpid(info->pid, &status, WNOHANG);
if (WIFEXITED(status)) return WEXITSTATUS(status);
return 1;
}
void writeInput(ProcessInfo* info, std::string_view data) {
if (!info || !info->running) return;
write(info->stdin_fd, data.data(), data.size());
}
std::string readOutput(ProcessInfo* info) {
if (!info) return "";
char buf[4096];
ssize_t n = read(info->stdout_fd, buf, sizeof(buf));
if (n > 0) {
info->output.append(buf, n);
return info->output.substr(info->output.size() - n, n);
}
return "";
}
std::string readError(ProcessInfo* info) {
if (!info) return "";
char buf[4096];
ssize_t n = read(info->stderr_fd, buf, sizeof(buf));
if (n > 0) {
info->error.append(buf, n);
return info->error.substr(info->error.size() - n, n);
}
return "";
}
}
}
}
#endif
src/desktoplib/os/windows_proc.cpp
+165
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@@ -0,0 +1,165 @@
#ifdef _WIN32
#include "common_proc.hpp"
#include <windows.h>
#include <vector>
#include <string>
#include <sstream>
namespace ckitty {
namespace proc {
namespace os {
struct ProcessInfo {
PROCESS_INFORMATION pi = {};
HANDLE hStdin = nullptr;
HANDLE hStdout = nullptr;
HANDLE hStderr = nullptr;
bool running = false;
std::string output;
std::string error;
};
ProcessInfo* createProcess(const std::string& exec, const std::vector<std::string>& args) {
SECURITY_ATTRIBUTES sa;
sa.nLength = sizeof(SECURITY_ATTRIBUTES);
sa.bInheritHandle = TRUE;
sa.lpSecurityDescriptor = nullptr;
HANDLE hStdinRead = nullptr, hStdinWrite = nullptr;
HANDLE hStdoutRead = nullptr, hStdoutWrite = nullptr;
HANDLE hStderrRead = nullptr, hStderrWrite = nullptr;
if (!CreatePipe(&hStdoutRead, &hStdoutWrite, &sa, 0)) return nullptr;
if (!CreatePipe(&hStderrRead, &hStderrWrite, &sa, 0)) {
CloseHandle(hStdoutRead); CloseHandle(hStdoutWrite);
return nullptr;
}
if (!CreatePipe(&hStdinRead, &hStdinWrite, &sa, 0)) {
CloseHandle(hStdoutRead); CloseHandle(hStdoutWrite);
CloseHandle(hStderrRead); CloseHandle(hStderrWrite);
return nullptr;
}
SetHandleInformation(hStdoutRead, HANDLE_FLAG_INHERIT, 0);
SetHandleInformation(hStderrRead, HANDLE_FLAG_INHERIT, 0);
SetHandleInformation(hStdinWrite, HANDLE_FLAG_INHERIT, 0);
STARTUPINFOA si = { sizeof(STARTUPINFOA) };
si.dwFlags = STARTF_USESTDHANDLES;
si.hStdOutput = hStdoutWrite;
si.hStdError = hStderrWrite;
si.hStdInput = hStdinRead;
std::string cmdLine = exec;
for (const auto& arg : args) {
cmdLine += ' ';
cmdLine += arg;
}
PROCESS_INFORMATION pi = {};
BOOL result = CreateProcessA(
nullptr,
&cmdLine[0],
nullptr,
nullptr,
TRUE,
0,
nullptr,
nullptr,
&si,
&pi
);
CloseHandle(hStdoutWrite);
CloseHandle(hStderrWrite);
CloseHandle(hStdinRead);
if (!result) {
CloseHandle(hStdoutRead);
CloseHandle(hStderrRead);
CloseHandle(hStdinWrite);
return nullptr;
}
auto* info = new ProcessInfo();
info->pi = pi;
info->hStdin = hStdinWrite;
info->hStdout = hStdoutRead;
info->hStderr = hStderrRead;
info->running = true;
return info;
}
void destroyProcess(ProcessInfo* info) {
if (!info) return;
if (info->running) {
TerminateProcess(info->pi.hProcess, 1);
WaitForSingleObject(info->pi.hProcess, 1000);
}
if (info->pi.hProcess) CloseHandle(info->pi.hProcess);
if (info->pi.hThread) CloseHandle(info->pi.hThread);
if (info->hStdin) CloseHandle(info->hStdin);
if (info->hStdout) CloseHandle(info->hStdout);
if (info->hStderr) CloseHandle(info->hStderr);
delete info;
}
bool isRunning(ProcessInfo* info) {
if (!info || !info->running) return false;
DWORD result = WaitForSingleObject(info->pi.hProcess, 0);
if (result == WAIT_OBJECT_0) {
info->running = false;
return false;
}
return true;
}
int getExitCode(ProcessInfo* info) {
if (!info) return 0;
if (info->running) return 0;
DWORD code = 0;
GetExitCodeProcess(info->pi.hProcess, &code);
return static_cast<int>(code);
}
void writeInput(ProcessInfo* info, std::string_view data) {
if (!info || !info->running) return;
DWORD written = 0;
WriteFile(info->hStdin, data.data(), static_cast<DWORD>(data.size()), &written, nullptr);
}
std::string readOutput(ProcessInfo* info) {
if (!info) return "";
char buf[4096];
DWORD read = 0;
DWORD avail = 0;
if (PeekNamedPipe(info->hStdout, nullptr, 0, nullptr, &avail, nullptr) && avail > 0) {
if (ReadFile(info->hStdout, buf, std::min<DWORD>(avail, sizeof(buf)), &read, nullptr) && read > 0) {
info->output.append(buf, read);
return info->output.substr(info->output.size() - read, read);
}
}
return "";
}
std::string readError(ProcessInfo* info) {
if (!info) return "";
char buf[4096];
DWORD read = 0;
DWORD avail = 0;
if (PeekNamedPipe(info->hStderr, nullptr, 0, nullptr, &avail, nullptr) && avail > 0) {
if (ReadFile(info->hStderr, buf, std::min<DWORD>(avail, sizeof(buf)), &read, nullptr) && read > 0) {
info->error.append(buf, read);
return info->error.substr(info->error.size() - read, read);
}
}
return "";
}
}
}
}
#endif
src/desktoplib/proc/Process.cpp
+59
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@@ -0,0 +1,59 @@
#include "Process.hpp"
#include <sstream>
namespace ckitty {
Process::~Process() {
if (ProcessInfo) {
ckitty::proc::os::destroyProcess(ProcessInfo);
ProcessInfo = nullptr;
}
}
void Process::setExec(std::string_view view) {
exec_ = view;
}
void Process::addParam(std::string_view param) {
args_.push_back(std::string(param));
}
void Process::run() {
if (ProcessInfo) return;
ProcessInfo = ckitty::proc::os::createProcess(exec_, args_);
}
bool Process::isRunning() {
if (!ProcessInfo) return false;
return ckitty::proc::os::isRunning(ProcessInfo);
}
int Process::stopCode() {
if (!ProcessInfo) return 0;
return ckitty::proc::os::getExitCode(ProcessInfo);
}
void Process::addInput(std::string_view view) {
if (!ProcessInfo) return;
ckitty::proc::os::writeInput(ProcessInfo, view);
}
std::string_view Process::getOutput() {
if (!ProcessInfo) return "";
static std::string accumulated;
std::string fresh = ckitty::proc::os::readOutput(ProcessInfo);
if (!fresh.empty()) {
accumulated += fresh;
}
return accumulated;
}
std::string_view Process::nextOutput() {
if (!ProcessInfo) return "";
static std::string fresh;
fresh = ckitty::proc::os::readOutput(ProcessInfo);
return fresh;
}
}
src/desktoplib/proc/Process.hpp
+8 -41
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@@ -1,66 +1,33 @@
#pragma once
#include <iostream>
#include <string>
#include <string_view>
#include <sstream>
#include <optional>
#include <vector>
#include <desktoplib/os/common_proc.hpp>
namespace ckitty {
/**
* Represents a process, which is executed by an OS.
* It exposes streams to the input and output of the process.
*/
class Process {
private:
ckitty::proc::os::ProcessInfo* ProcessInfo = nullptr;
std::string exec_;
std::vector<std::string> args_;
public:
Process();
Process() = default;
~Process();
public:
/**
* Sets the program string.
*/
void setExec(std::string_view view);
/**
* Sets the parameters, with a map<string, string> map.
* They can also be passed as a raw string in the setExec method.
*/
void setParams();
/**
* Starts executing the program.
*/
void addParam(std::string_view param);
void run();
bool isRunning();
/**
* Returns the stop code.
* Returns 0 if the code is still running.
*/
int stopCode();
void addInput(std::string_view view);
/**
* Receives all the output so far.
*/
std::string_view getOutput();
/**
* Receives the output fresh from the pipe.
*/
std::string_view nextOutput();
// same pipe for error...
};
}