FreeCalypso > hg > freecalypso-tools
view libserial-linux/setbyname.c @ 965:2969032bdfac
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.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 01 Sep 2023 07:33:51 +0000 |
parents | fd7b447b99e3 |
children |
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/* * This module contains the wrapper function (used by loadtools) * that looks up a baud rate by name and calls set_serial_baud(). */ #include <stdio.h> #include <stdlib.h> #include "baudrate.h" extern struct baudrate *find_baudrate_by_name(); set_fixed_baudrate(baudname) char *baudname; { struct baudrate *br; br = find_baudrate_by_name(baudname); if (!br) exit(1); /* error msg already printed */ set_serial_baudrate(br); }