Тестовые примеры / ch4 / ps

	/* ps.C */

	#include <stdio.h>

	int main () 

	{

		/* execute the command */

		FILE * cmdp = popen( "ps -ef | grep root","r" );

		if ( !cmdp ) 		{

			perror ( "popen" );

			return 1;

		}

	

		char result [256] ;

		/* now read the "grep" command outputs */

		while ( fgets( result, sizeof(result), cmdp ) )

			fputs( result, stdout );	// echo each line read



		pclose( cmdp );		// close the stream

		return 0;

	}