FreeCalypso > hg > freecalypso-tools

annotate loadtools/tpinterfb.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 8d7dcfd9df53
children
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1 /*
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2 * This module contains functions for binary (as opposed to our usual ASCII)
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3 * interfacing to loadagent.
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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/time.h>
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8 #include <sys/errno.h>
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9 #include <stdio.h>
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10 #include <string.h>
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11 #include <strings.h>
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12 #include <stdlib.h>
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13 #include <unistd.h>
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14
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15 extern int errno;
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16
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17 extern int target_fd;
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18
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19 collect_binblock_from_target(buf, expect_len, timeout)
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20 u_char *buf;
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21 unsigned expect_len;
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22 {
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23 fd_set fds;
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24 struct timeval tv;
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25 unsigned rcvd;
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26 int cc;
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27
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28 for (rcvd = 0; rcvd < expect_len; ) {
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29 FD_ZERO(&fds);
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30 FD_SET(target_fd, &fds);
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31 tv.tv_sec = timeout;
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32 tv.tv_usec = 0;
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33 cc = select(target_fd+1, &fds, NULL, NULL, &tv);
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34 if (cc < 0) {
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35 if (errno == EINTR)
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36 continue;
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37 perror("select");
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38 return(-1);
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39 }
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40 if (cc < 1) {
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41 fprintf(stderr,
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42 "error: timeout waiting for binary block\n");
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43 return(-1);
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44 }
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45 cc = read(target_fd, buf + rcvd, expect_len - rcvd);
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46 if (cc <= 0) {
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47 perror("read after successful select");
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48 return(-1);
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49 }
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50 rcvd += cc;
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51 }
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52 return(0);
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53 }