Prova Pratica 2012.05.30

Soluzione di Dado e Pierg

#include <stdio.h>
#include <stdlib.h>
#include "s2argv/s2argv.h"
#define MAKEFILE "minimakefile"
#define RUN "run"

int main(int argc, char * argv[]){
	FILE *mf;
	char *line=NULL;
	char *target,*command;
	int dim=0;
	mf=fopen(MAKEFILE,"r");
	if(mf==NULL){
		fprintf(stderr,"minimakefile not found!\n");
		exit(1);
	}
	while(getline(&line,&dim,mf)>0){
		target=strtok(line,":");
		command=strtok(NULL,"\n");
		if(strcmp(target,RUN)==0){
			system_noshell(command);
		}
		else if(fopen(target,"r")==NULL){
			system_noshell(command);
		}
        else{
			fprintf(stderr,"target %s già esistente: non eseguo\n",target);
		}
	}
	free(line);
	fclose(mf);
	return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#include "s2argv/s2argv.h"
#define MAKEFILE "minimakefile"
#define RUN "run"

int main(int argc, char * argv[]){
	FILE *mf;
	char *line=NULL;
	char *target, *tmp;
	int dim = 0;
    int a = b = 0;
    struct stat st_target, st_tmp;
    
	mf=fopen(MAKEFILE,"r");
	if(fd==NULL){
		fprintf(stderr,"minimakefile not found!\n");
		exit(1);
	}
	while(getline(&line,&dim,mf)>0){
        if (line[0] == "\t") {
            if(a || b){
                system_noshell(line + 1);
            }
        }
		else{
			a = b = 0;
            target = strtok(line, ":")
            if(fopen(target,"r")==NULL){
                a = 1;
		    }
            else if(strcmp(target,RUN)==0){
                char *command = strtok(NULL, "\n");
                system_noshell(command);
		    }
            else {
                stat(target, &st_target);
                while ((tmp = (strtok(NULL, " "))!=NULL){
                    stat(tmp, &st_tmp);
                    if (st_tmp.st_mtime > st_target.st_mtime ) {
                        b = 1;
                        break;
                    }
                }
		    }
		}
	}
	free(line);
	fclose(fd);
	return 0;
}