2017-07-01 commit

master
Chris Punches 2017-07-01 16:29:27 -04:00
parent 9ba01c358c
commit 0552f80b77
1 changed files with 71 additions and 2 deletions

View File

@ -1,4 +1,6 @@
#include "Task.h"
#include <unistd.h>
#include <stdio.h>
/// Task_InvalidDataStructure - Exception thrown when a Task is defined with invalid JSON.
class Task_InvalidDataStructure: public std::runtime_error { public:
@ -94,8 +96,75 @@ void Task::execute( bool verbose )
std::cout << "\t Executing target \"" << this->definition.get_target() << "\"." << std::endl;
}
FILE * STDOUT;
FILE * STDERR;
this->do_raw_command();
}
int Task::do_raw_command( std::string command, std::string & STDOUT, std::string & STDIN );
{
/*
* since pipes are unidirectional, we need two pipes. one for data to flow from parent's stdout to child's stdin and
* the other for child's stdout to flow to parent's stdin
*/
#define NUM_PIPES 2
#define PARENT_WRITE_PIPE 0
#define PARENT_READ_PIPE 1
int pipes[NUM_PIPES][2];
/*
* always in a pipe[], pipe[0] is for read and pipe[1] is for write
*/
#define READ_FD 0
#define WRITE_FD 1
#define PARENT_READ_FD ( pipes[PARENT_READ_PIPE][READ_FD] )
#define PARENT_WRITE_FD ( pipes[PARENT_WRITE_PIPE][WRITE_FD] )
#define CHILD_READ_FD ( pipes[PARENT_WRITE_PIPE][READ_FD] )
#define CHILD_WRITE_FD ( pipes[PARENT_READ_PIPE][WRITE_FD] )
int outfd[2];
int infd[2];
// pipes for parent to write and read
pipe(pipes[PARENT_READ_PIPE]);
pipe(pipes[PARENT_WRITE_PIPE]);
if(!fork()) {
char *argv[]={ "/usr/bin/bc", "-q", 0};
dup2(CHILD_READ_FD, STDIN_FILENO);
dup2(CHILD_WRITE_FD, STDOUT_FILENO);
/* Close fds not required by child. Also, we don't
want the exec'ed program to know these existed */
close(CHILD_READ_FD);
close(CHILD_WRITE_FD);
close(PARENT_READ_FD);
close(PARENT_WRITE_FD);
execv(argv[0], argv);
} else {
char buffer[100];
int count;
/* close fds not required by parent */
close(CHILD_READ_FD);
close(CHILD_WRITE_FD);
// Write to childs stdin
write(PARENT_WRITE_FD, "2^32\n", 5);
// Read from childs stdout
count = read(PARENT_READ_FD, buffer, sizeof(buffer)-1);
if (count >= 0) {
buffer[count] = 0;
printf("%s", buffer);
} else {
printf("IO Error\n");
}
}
}