/** * The "dhcp" command * * @v argc Argument count * @v argv Argument list * @ret rc Exit code */ static int dhcp_exec ( int argc, char **argv ) { static struct option longopts[] = { { "help", 0, NULL, 'h' }, { NULL, 0, NULL, 0 }, }; const char *netdev_txt; struct net_device *netdev; int c; int rc; /* Parse options */ while ( ( c = getopt_long ( argc, argv, "h", longopts, NULL ) ) >= 0 ){ switch ( c ) { case 'h': /* Display help text */ default: /* Unrecognised/invalid option */ dhcp_syntax ( argv ); return 1; } } /* Need exactly one interface name remaining after the options */ if ( optind != ( argc - 1 ) ) { dhcp_syntax ( argv ); return 1; } netdev_txt = argv[optind]; /* Parse arguments */ netdev = find_netdev ( netdev_txt ); if ( ! netdev ) { printf ( "No such interface: %s\n", netdev_txt ); return 1; } /* Perform DHCP */ if ( ( rc = dhcp ( netdev ) ) != 0 ) { printf ( "Could not configure %s: %s\n", netdev->name, strerror ( rc ) ); return 1; } return 0; }
/** * The "dhcp" command * * @v argc Argument count * @v argv Argument list * @ret rc Exit code */ static int dhcp_exec ( int argc, char **argv ) { static struct option longopts[] = { { "help", 0, NULL, 'h' }, { NULL, 0, NULL, 0 }, }; const char *netdev_name; struct net_device *netdev; int c; int rc; /* Parse options */ while ( ( c = getopt_long ( argc, argv, "h", longopts, NULL ) ) >= 0 ){ switch ( c ) { case 'h': /* Display help text */ default: /* Unrecognised/invalid option */ dhcp_syntax ( argv ); return 1; } } if ( optind != argc ) { /* Treat arguments as a list of interfaces to try */ while ( optind != argc ) { netdev_name = argv[optind++]; if ( ( rc = dhcp_exec_name ( netdev_name ) ) == 0 ) return 0; } } else { /* Try all interfaces */ for_each_netdev ( netdev ) { if ( ( rc = dhcp_exec_netdev ( netdev ) ) == 0 ) return 0; } } return 1; }