FreeCalypso > hg > freecalypso-tools
view miscutil/fc-serterm.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 | fb577c31e960 |
children |
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/* * This hack-utility opens a serial port at the user-specified baud rate * and drops into a terminal pass-thru mode, except that any binary bytes * received on this port are turned into cat -v form. The intent is for * sniffing on and/or talking to targets that emit some ASCII mixed in * with binary. */ #include <stdio.h> #include <stdlib.h> main(argc, argv) char **argv; { if (argc != 3) { fprintf(stderr, "usage: %s ttyname baudrate\n", argv[0]); exit(1); } open_serial_port(argv[1]); set_fixed_baudrate(argv[2]); tty_passthru(); exit(0); }