FreeCalypso > hg > freecalypso-tools

annotate loadtools/old/gtapower.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 62a91abc0300
children
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1 /*
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2 * This module is included only when loadtools are being built to run on the
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3 * GTA0x application processor (AP). It provides automated modem power
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4 * control, i.e., coordinates modem power control with loadtools operations
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5 * for convenience.
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6 */
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7
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8 #include <sys/types.h>
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9 #include <sys/file.h>
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10 #include <stdio.h>
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11 #include <stdlib.h>
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12 #include <unistd.h>
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13
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14 /*
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15 * Check this pathname: it is correct for the kernel version I'm using
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16 * on my test GTA02, but it differs for some other kernel versions.
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17 */
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18 static char modem_powerctl_pathname[] =
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19 "/sys/bus/platform/devices/gta02-pm-gsm.0/power_on";
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20
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21 void
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22 set_gta_modem_power_ctrl(boolval)
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23 {
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24 char strbuf[16];
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25 int len, fd;
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26
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27 len = sprintf(strbuf, "%d\n", boolval);
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28 fd = open(modem_powerctl_pathname, O_WRONLY);
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29 if (fd < 0) {
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30 perror(modem_powerctl_pathname);
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31 exit(1);
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32 }
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33 write(fd, strbuf, len);
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34 close(fd);
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35 }
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36
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37 void
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38 fork_gta_modem_poweron()
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39 {
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40 int i;
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41
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42 i = fork();
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43 if (i < 0) {
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44 perror("fork");
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45 exit(1);
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46 }
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47 if (i)
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48 return;
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49 printf("Toggling %s\n", modem_powerctl_pathname);
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50 set_gta_modem_power_ctrl(0);
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51 usleep(350000);
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52 set_gta_modem_power_ctrl(1);
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53 exit(0);
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54 }