FreeCalypso > hg > freecalypso-tools

annotate miscutil/fc-pulse-dtr.c @ 1011:6d9b10633f10 default tip

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etmsync Pirelli IMEI retrieval: fix poor use of printf() Bug reported by Vadim Yanitskiy <fixeria@osmocom.org>: the construct where a static-allocated string was passed to printf() without any format arguments causes newer compilers to report a security problem. Given that formatted output is not needed here, just fixed string output, change printf() to fputs(), and direct the error message to stderr while at it.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 23 May 2024 17:29:57 +0000
parents 5b8287c655cf
children
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5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
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1 /*
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2 * This utility opens a serial port, asserts DTR for 50 ms, then negates it
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3 * and exits. It is intended for use with FreeCalypso DUART28C adapters.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <sys/file.h>
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8 #include <sys/ioctl.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
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13 main(argc, argv)
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14 char **argv;
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15 {
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16 int target_fd;
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17 int mctl_arg = TIOCM_DTR;
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18
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19 if (argc != 2) {
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20 fprintf(stderr, "usage: %s ttyname\n", argv[0]);
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21 exit(1);
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22 }
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23 target_fd = open(argv[1], O_RDWR|O_NONBLOCK);
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24 if (target_fd < 0) {
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25 perror(argv[1]);
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26 exit(1);
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27 }
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28 ioctl(target_fd, TIOCMBIS, &mctl_arg);
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29 usleep(50000);
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30 ioctl(target_fd, TIOCMBIC, &mctl_arg);
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31 exit(0);
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32 }