FreeCalypso > hg > freecalypso-tools

annotate uptools/atcmd/smsend_concat.c @ 1012:11391cb6bdc0

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patch from fixeria: doc change from SE K2x0 to K2xx Since their discovery in late 2022, Sony Ericsson K200 and K220 phones were collectively referred to as SE K2x0 in FreeCalypso documentation. However, now that SE K205 has been discovered as yet another member of the same family (same PCBA in different case), it makes more sense to refer to the whole family as SE K2xx.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 23 Sep 2024 12:23:20 +0000
parents 076d533f840d
children
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076d533f840d fcup-smsend: implemented automatic concat SMS refno generation
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1 /*
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2 * This module contains the messy code for automatic generation and
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3 * increment of concat SMS reference numbers.
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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/param.h>
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8 #include <sys/file.h>
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9 #include <sys/time.h>
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10 #include <ctype.h>
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11 #include <stdio.h>
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12 #include <stdlib.h>
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13 #include <unistd.h>
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14 #include "../../rvinterf/include/exitcodes.h"
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15
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16 static int
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17 initial_seed()
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18 {
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19 struct timeval tv;
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20 u_char refno, *cp, *endp;
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21
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22 gettimeofday(&tv, 0);
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23 cp = (u_char *) &tv;
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24 endp = cp + sizeof(struct timeval);
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25 refno = 0;
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26 while (cp < endp)
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27 refno ^= *cp++;
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28 return refno;
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29 }
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30
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31 get_concsms_refno_from_host_fs()
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32 {
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33 char *homedir, statefile[MAXPATHLEN];
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34 int fd, cc;
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35 char buf[6];
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36 u_char refno;
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37
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38 homedir = getenv("HOME");
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39 if (!homedir) {
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40 fprintf(stderr,
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41 "error: no HOME= defined, needed for concat SMS refno\n");
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42 exit(ERROR_UNIX);
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43 }
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44 sprintf(statefile, "%s/.concat_sms_refno", homedir);
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45 fd = open(statefile, O_RDWR|O_CREAT, 0666);
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46 if (fd < 0) {
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47 perror(statefile);
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48 exit(ERROR_UNIX);
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49 }
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50 cc = read(fd, buf, 5);
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51 if (cc == 5 && buf[0] == '0' && buf[1] == 'x' && isxdigit(buf[2]) &&
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52 isxdigit(buf[3]) && buf[4] == '\n')
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53 refno = strtoul(buf, 0, 16) + 1;
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54 else
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55 refno = initial_seed();
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56 sprintf(buf, "0x%02X\n", refno);
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57 lseek(fd, 0, SEEK_SET);
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58 write(fd, buf, 5);
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59 close(fd);
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60 return refno;
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61 }