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/* Effettua la manipolazione dei canali standard output ed error */
#include
#include
#include
#include
#define STDIN 0
#define STDOUT 1
#define STDERR 2
#define DEVNULL "file.log"
int main() {
int fd;
printf("messaggio n.1 sullo standard output\n");
perror("errore n.1 simulato");
if ((fd = open(DEVNULL, O_WRONLY | O_CREAT | O_TRUNC, 0600)) == -1) {
perror(DEVNULL);
exit(1);
}
close(STDOUT);
dup(fd);
printf("messaggio n.2 sullo standard output\n");
perror("errore n.2 simulato");
close(STDERR);
dup(fd);
printf("messaggio n.3 sullo standard output\n");
perror("errore n.3 simulato");
}