fd_in = open(argv[1], O_RDONLY);
if (fd_in < 0)
{
- perror("Error while opening: ");
+ perror("Error opening input file");
exit(1);
}
fd_out = open(argv[2], O_WRONLY|O_CREAT, 00644);
if (fd_out < 0)
{
- perror("Error while opening: ");
+ perror("Error opening output file");
close(fd_in);
exit(1);
}