setCV

#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <limits.h>
#include <string.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>

#define SECTOR_SIZE 4096

char numeFisierSursa[PATH_MAX],numeFisierDestinatie[PATH_MAX];
char buffer[SECTOR_SIZE],comanda[10];
int bytes_read;

int main(int argc,char **argv)
{
    FILE *fptr1,*fptr2;

    printf("Nume fisier sursa : ");
    scanf("%s",numeFisierSursa);

    printf("Nume fisier destinatie : ");
    scanf("%s",numeFisierDestinatie);

    if((fptr1 = fopen(numeFisierSursa,"r")) == NULL)
    {
	perror("Error on opening file");
	exit(1);
    }

    if(fopen(numeFisierDestinatie,"w")!=NULL)
    {
	printf("Doriti sa suprascrieti continutul ? da/nu ");
	scanf("%10s",&comanda);
	if(strcmp(comanda,"da")!=0)
	{
	    printf("\nNu ati acordat permisiunea");
	    exit(5);
	}
	fptr2 = fopen(numeFisierDestinatie,"wb");
	chmod(numeFisierDestinatie,S_IRUSR | S_IWUSR);
    }
    while(fgets(buffer,SECTOR_SIZE,fptr1)!=NULL)
    {
	for(int i=0;buffer[i]!=NULL;i++)
	    if(buffer[i] >= 'a' && buffer[i] <= 'z')
		buffer[i]=buffer[i]-'a'+'A';

	fprintf(fptr2,"%s",buffer);
    }

    if(fclose(fptr1)==-1||fclose(fptr2)==-1)
    {
	perror("Error on closing file");
	exit(4);
    }

    return 0;
}