App.cc File Reference

#include "App.h"
#include <unistd.h>
#include <climits>
#include <fstream>
#include <sstream>
#include "FileSystem.h"
#include "Logger/Logger.h"

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Macros
#define	MAX_PLATFORM_INFO_LENGTH   1024
#define	MAX_PLATFORM_LINE_LENGTH   256

Functions
bool	FindExecutablePath (std::string &path)
	Retrieves the absolute path of the currently running executable.
std::string	GetReleaseInformation ()
	Retrieves the operating system release information.
std::string	OutputOfCommand (const char *command)
	Executes a shell command and returns its output.

Macro Definition Documentation

MAX_PLATFORM_INFO_LENGTH

#define MAX_PLATFORM_INFO_LENGTH   1024

MAX_PLATFORM_LINE_LENGTH

#define MAX_PLATFORM_LINE_LENGTH   256

Function Documentation

FindExecutablePath()

bool FindExecutablePath

(

std::string &

path

)

Retrieves the absolute path of the currently running executable.

This function determines the full path of the running executable and stores it in the path parameter. It supports both macOS (_NSGetExecutablePath) and Linux (/proc/self/exe).

Note

On macOS, _NSGetExecutablePath is used, and the buffer size is checked dynamically.

On Linux, the function reads from /proc/self/exe using readlink().

Warning

On macOS, if the buffer is too small, _NSGetExecutablePath may fail, this implementation does not handle resizing the buffer.

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GetReleaseInformation()

std::string GetReleaseInformation

(

)

Retrieves the operating system release information.

This function fetches OS release details using platform-specific methods:

• On macOS, it runs the sw_vers command and reads the output.
• On Linux/Unix, it attempts to read /etc/os-release, which is available on most distributions using systemd.

Note

• On macOS, popen("sw_vers", "r") is used to execute sw_vers, which outputs OS version details.
• On Linux, the function reads the /etc/os-release file into a string.
• If an error occurs while reading the file, a warning is logged via spdlog::warn.

Warning

• The function does not support Windows.
• On macOS, buffer overflow protection is in place, but the buffer size is fixed.

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OutputOfCommand()

std::string OutputOfCommand

(

const char *

command

)

Executes a shell command and returns its output.

This function opens a pipe using popen() to execute the given command, reads its output, and returns it as a std::string.

Note

• The function trims trailing newline characters from the output.
• The caller must ensure the command is safe to execute (avoid shell injection).
• Works only on Unix-like systems.

Warning

• If popen() fails, an error message is printed, and an empty string is returned.
• The function does not handle command execution failures beyond detecting if popen() fails.

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