FreeCalypso > hg > freecalypso-tools

annotate libserial-linux/setbaud.c @ 965:2969032bdfac

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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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1 /*
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2 * This module implements the termios/ioctl setting of the baud rate.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <sys/ioctl.h>
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7 #include <asm/ioctls.h>
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8 #include <asm/termbits.h>
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9 #include <stdio.h>
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10 #include <stdlib.h>
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11 #include <unistd.h>
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12 #include "baudrate.h"
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14 extern int target_fd;
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16 struct baudrate *current_baud_rate;
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17
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18 set_serial_baudrate(br)
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19 struct baudrate *br;
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20 {
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21 struct termios2 target_termios;
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23 target_termios.c_iflag = IGNBRK;
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24 target_termios.c_oflag = 0;
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25 target_termios.c_cflag = br->termios_code | CLOCAL|HUPCL|CREAD|CS8;
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26 target_termios.c_lflag = 0;
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27 target_termios.c_cc[VMIN] = 1;
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28 target_termios.c_cc[VTIME] = 0;
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29 target_termios.c_ispeed = br->nonstd_speed;
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30 target_termios.c_ospeed = br->nonstd_speed;
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31 if (ioctl(target_fd, TCSETSF2, &target_termios) < 0) {
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32 perror("TCSETSF2");
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33 exit(1);
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34 }
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35 current_baud_rate = br;
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36 return 0;
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37 }