ProvaPratica 2009.06.23

http://www.cs.unibo.it/~renzo/so/pratiche/2009.06.23.pdf

Esercizio 1

Soluzione di Stefano92

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main(int argc, char* argv[])
{
	if (argc!=2)
	{
		printf("Usage: ./scriptexec COMMAND_FILE\n");
		return(1);
	}
	FILE* fp;
	char* buf= NULL;
	int ris=0,ris_fork=0;
	unsigned long size=0;
	fp=fopen(argv[1],"r");
	if(fp == NULL)
	{
		printf("FILE NON ESISTENTE\n");
		return -1;
	}
	while ((ris=getline(&buf,&size,fp)!=-1))
	{
		if (buf[0]!='#')
		{
			ris_fork= fork();
			if (ris_fork == 0)
				execl("/bin/sh","/bin/sh","-c",buf,0);
			else
				wait(&ris_fork);
		}
	}
}

-stefano92

Soluzione di Dado e Pierg

#include <stdio.h>
#include <stdlib.h>
#include "s2argv/s2argv.h"

int main(int argc, char * argv[]){
    if(argc!=2){
        printf("Wrong parameters number\n");
    }else{
    	char *comm=NULL;
    	FILE *f;
    	ssize_t dim=0;
    	f=fopen(argv[1],"r");
    	if(f==NULL){
    		printf("Error while opening file %s\n",argv[1]);
    		exit(1);
    	}
        while(getline(&comm,&dim,f)>0){
		system_noshell(comm);
		/*preparo comandi successivi*/
    	        free(comm);
    	        comm=NULL;
        }
    }
}