FreeCalypso > hg > freecalypso-tools

annotate uptools/atcmd/smsend_concat.c @ 926:6a0aa8d36d06

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rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +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 }