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

#define MAXCHAR 1000

int main() {
	pid_t child_id;
	int status;
	char file_name[] = "access.log.2";
	child_id = fork();

  	if (child_id < 0) {
    	exit(EXIT_FAILURE);
  	}

  	if (child_id == 0) {
    	// this is child

		char *argv[] = {"unzip","access.log.2.zip", NULL};
		execv("/usr/bin/unzip", argv);
	}

	else {
    	// this is parent
		while ((wait(&status)) > 0);
		FILE *fo, *fw;
		char *line = NULL;
		size_t len = 0;
		ssize_t read;

		fo = fopen("access.log.2","r");
		fw = fopen("output.txt","a");

		while ((read = getline(&line, &len, fo)) != -1)
		{
			if(strstr(line,"Apache"))
			{
				fprintf(fw,"%s\n",line);
			}
		}
		fclose(fo);
		fclose(fw);

		status = remove("access.log.2");

		if(status == 0)
			printf("%s successfully deleted\n",file_name);
		else
			printf("Unable to delete file\n");
    }

	return 0;
}