How Can I Efficiently Capture stdout from a `system()` Command in C/C ?

Capturing stdout from a system() Command Optimally

In C/C , capturing the output of an external application started via system() is essential for further processing. The popen() function provides an efficient solution for this task.

According to the popen manual:

#include <stdio.h>

FILE *popen(const char *command, const char *type);

int pclose(FILE *stream);

To use popen():

1. Declare a FILE* variable to hold the stream.
2. Call popen() with the command you want to execute and the type of processing you want to do ("r" for reading from the external application).
3. Use the returned FILE as you would any other FILE to read the output of the command.
4. Call pclose() to close the stream and wait for the external application to finish executing.

This approach provides an efficient way to capture stdout from a system() command and send it to another function for further processing.

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