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/*
Homework n.1
Scrivere un programma in linguaggio C che permetta di copiare un numero
arbitrario di file regolari su una directory di destinazione preesistente.
Il programma dovra' accettare una sintassi del tipo:
$ homework-1 file1.txt path/file2.txt "nome con spazi.pdf" directory-destinazione
*/
#include
#include
#include
#include
#include
#define BUFSIZE 4096
#define MODE 0660
int main(int argc, char *argv[]) {
int sd, dd, size, i;
char buffer[BUFSIZE];
char *p1, *p2;
// controlla di avere almeno 2 parametri effettivi
if (argc < 3) {
printf("utilizzo: %s [...] \n", argv[0]);
exit(1);
}
for (i = 1; i < argc-1; i++) {
// apre il file sorgente di turno in sola lettura
printf("%s\t--> ", argv[i]);
if ((sd = open(argv[i], O_RDONLY)) == -1) {
perror(argv[i]);
exit(1);
}
/* prepara in 'buffer' il nome del file di destinazione:
/ */
strncpy(buffer, argv[argc-1], BUFSIZE);
size = strlen(buffer);
strncpy(buffer + size, "/", BUFSIZE - size);
size++;
/* isola nel pathname sorgente la parte finale del filename;
in alternativa si poteva usare basename() */
p1 = p2 = argv[i];
while (*p2 != '\0') {
if (*p2 == '/') p1 = p2+1;
p2++;
}
strncpy(buffer + size, p1, BUFSIZE - size);
// apre il file destinazione in sola scrittura, con troncamento e creazione
printf("%s\n", buffer);
if ((dd = open(buffer, O_WRONLY|O_CREAT|O_TRUNC, MODE)) == -1) {
perror(buffer);
exit(1);
}
// copia i dati dalla sorgente alla destinazione
do {
// legge fino ad un massimo di BUFSIZE byte dalla sorgente
if ((size = read(sd, buffer, BUFSIZE)) == -1) {
perror(argv[1]);
exit(1);
}
// scrive i byte letti
if (write(dd, buffer, size) == -1) {
perror(argv[2]);
exit(1);
}
} while (size == BUFSIZE);
// chiude i file attualmente aperti
close(sd);
close(dd);
}
}