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annotate rvinterf/etmsync/launchrvif.c @ 275:cedf09b6b5ac

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started laying the foundation for fc-fsio host utility
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sun, 23 Feb 2014 20:27:15 +0000
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children 909f00c15f27
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275
cedf09b6b5ac started laying the foundation for fc-fsio host utility
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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1 /*
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2 * This module implements the optional "behind the scenes" invokation
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3 * of rvinterf from fc-fsio etc.
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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/socket.h>
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include <unistd.h>
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11
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12 static char rvinterf_pathname[] = "/usr/local/bin/rvinterf";
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13
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14 extern int sock;
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15
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16 char *rvinterf_ttyport, *rvinterf_Bopt, *rvinterf_lopt, *rvinterf_wopt;
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17
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18 launch_rvinterf()
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19 {
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20 int sp[2], rc;
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21 char *rvif_argv[11], Sarg[16], **ap;
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22
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23 rc = socketpair(AF_UNIX, SOCK_STREAM, 0, sp);
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24 if (rc < 0) {
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25 perror("socketpair");
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26 exit(1);
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27 }
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28 sock = sp[0];
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29 sprintf(Sarg, "-S%d", sp[1]);
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30 ap = rvif_argv;
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31 *ap++ = "rvinterf";
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32 *ap++ = Sarg;
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33 *ap++ = "-n";
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34 if (rvinterf_Bopt) {
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35 *ap++ = "-B";
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36 *ap++ = rvinterf_Bopt;
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37 }
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38 if (rvinterf_lopt) {
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39 *ap++ = "-l";
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40 *ap++ = rvinterf_lopt;
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41 }
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42 if (rvinterf_wopt) {
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43 *ap++ = "-w";
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44 *ap++ = rvinterf_wopt;
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45 }
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46 *ap++ = rvinterf_ttyport;
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47 *ap = 0;
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48 rc = vfork();
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49 if (rc < 0) {
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50 perror("vfork for launching rvinterf");
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51 exit(1);
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52 }
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53 if (!rc) {
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54 /* we are in the child - do the exec */
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55 close(sp[0]);
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56 execv(rvinterf_pathname, rvif_argv);
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57 perror(rvinterf_pathname);
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58 _exit(1);
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59 }
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60 close(sp[1]);
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61 return 0;
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62 }