function::task_exe_file - Linux

Overview

The task_exe_file() function is used to obtain the executable file path of a given task. It is primarily used in performance analysis and debugging scenarios to identify the binary or script associated with a process.

Syntax

string task_exe_file(task_t task);

Parameters

• task_t task: The task for which the executable file path will be retrieved.

Options/Flags

This function has no options or flags.

Examples

Example 1: Getting the Executable Path of a Running Process

#include <stdexcept>
#include <iostream>
#include <libproc.h>

int main() {
  task_t task = proc_pidpath(getpid(), nullptr, 0);
  if (task == TASK_NULL) {
    throw std::runtime_error("Failed to obtain task");
  }

  char path[PROC_PIDPATHINFO_MAXSIZE];
  int len = proc_pidpath(task, path, sizeof(path));
  if (len <= 0) {
    throw std::runtime_error("Failed to get executable path");
  }

  std::cout << "Executable path: " << path << std::endl;
  return 0;
}

Common Issues

• Incorrect Task ID: If the provided task ID is invalid or does not represent a running process, the function will return TASK_NULL.
• Insufficient Permission: To successfully obtain the executable file path, the calling process must have sufficient permissions (e.g., root user or elevated privileges).

Integration

task_exe_file() can be integrated with other performance monitoring tools, such as top or htop, to provide a more detailed view of running processes and their associated binaries.

Related Commands

• proc_pidpath(): Obtains the path of the executable file for a given process ID.
• proc_pidstat(): Provides various statistics about a process, including its executable path.