FreeCalypso > hg > freecalypso-tools

annotate rvinterf/asyncshell/sendarb.c @ 407:19e5a3e2f9c0

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fcup-settime: moved time() retrieval a little closer to the output A fundamental problem with all simple time transfer tools is that there is always some delay between the time retrieval on the source system and that transmitted time being set on the destination, and the resulting time on the destination system is off by that delay amount. This delay cannot be fully eliminated when working in a simple environment like ours, but we should make our best effort to minimize it. In the present case, moving the atinterf_init() call before the time() retrieval should make a teensy-tiny improvement.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Aug 2018 21:52:17 +0000
parents d43d82cbfb85
children
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1 /*
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2 * Command for sending arbitrary packets to the target
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3 */
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4
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5 #include <sys/types.h>
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6 #include <stdio.h>
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7 #include <ctype.h>
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8 #include <string.h>
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9 #include <strings.h>
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10 #include <stdlib.h>
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11 #include "limits.h"
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12 #include "exitcodes.h"
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14 cmd_send_common(argc, argv)
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15 char **argv;
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16 {
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17 u_char sendpkt[MAX_PKT_TO_TARGET];
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18 unsigned pktlen = argc, i;
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19 char *endp;
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21 for (i = 0; i < pktlen; i++) {
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22 sendpkt[i] = strtoul(argv[i], &endp, 16);
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23 if (*endp) {
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24 printf(
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25 "error: all arguments to send command must be hex bytes\n");
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26 return(ERROR_USAGE);
0
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27 }
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28 }
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29 /* send it! */
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30 send_pkt_to_target(sendpkt, pktlen);
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31 return(0);
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32 }
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33
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34 void
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35 cmd_send_interactive(argstr)
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36 char *argstr;
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37 {
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38 char *argv[MAX_PKT_TO_TARGET+1];
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39 int argc, rc;
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41 rc = parse_interactive_command_into_argv(argstr, argv, 1,
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42 MAX_PKT_TO_TARGET, &argc);
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43 if (rc < 0)
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44 return;
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45 cmd_send_common(argc, argv);
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46 }
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48 cmd_send_oneshot(argc, argv)
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49 char **argv;
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50 {
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51 return cmd_send_common(argc - 1, argv + 1);
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52 }