#include<unistd.h>
#include<sys/wait.h>
#include<stdlib.h>
#include<string.h>
#include<stdio.h>

char* getoutput(const char *command){
	int pipe_ends[2];
	if(pipe(pipe_ends))
		return 0;
	size_t read_so_far = 0;
	ssize_t readlen;
	size_t space_left = 250;
	char *buffer = (char*)malloc(250);
	
	if(fork()) { // Then this is the parent process
		close(pipe_ends[1]);
		while(1){
			readlen = read(pipe_ends[0], buffer + read_so_far, space_left);
			if(readlen <= 0)
				break;
			read_so_far += readlen;
			space_left -= readlen;
			if(!space_left) {
				buffer = (char*)realloc(buffer, read_so_far + 250);
				space_left += 250;
			}
		}
		wait(0);
	} else { // Child process
		dup2(pipe_ends[1], 1);
		execl("/bin/sh", "sh", "-c", command);
		perror("exec");
		return 0;
	}
	return buffer;
}

char **split(char *tosplit, size_t *line_count){
	size_t length = strlen(tosplit);
	char **lines = (char**)malloc(100 * sizeof(char*));
	size_t line = 0;
	size_t lines_space_left = 100;
	lines[0] = tosplit;
	for(size_t i = 0; i < length; i++){
		if(tosplit[i] == '\n'){
			line++;
			tosplit[i] = 0;
			lines[line] = &tosplit[i] + 1; // If we have an extra one, revise this
			lines_space_left -= 1;
		}
		if(!lines_space_left){
			lines = (char**)realloc(lines, (line + 100) * sizeof(char*));
			lines_space_left += 100;
		}
	}
	*line_count = line;
	return lines;
}