fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing The only 100% safe way to pass a NULL pointer as a function argument in K&R C is to cast 0 to a pointer type; failing to do so may cause mysterious bugs (invalid stack frames or garbage in argument registers) on 64-bit machines. This issue has already been fixed in most of FC host tools, but I just found some missed spots: passing of NULL UDH to PDU encoding functions in fcup-smsend[mult] in the case of single (not concatenated) SMS.

/*
 * This module contains the loadtool_cmd_passthru() function,
 * which implements the simplest commands that pass directly
 * through to loadagent.
 */

#include <stdio.h>

loadtool_cmd_passthru(argc, argv)
	char **argv;
{
	if (tpinterf_make_cmd(argv) < 0) {
		fprintf(stderr, "error: unable to form target command\n");
		return(-1);
	}
	if (tpinterf_send_cmd() < 0)
		return(-1);
	return tpinterf_pass_output(1);
}