FreeCalypso > hg > freecalypso-tools
annotate loadtools/tpinterfb.c @ 942:fab04df64690
rvinterf/lowlevel: replace libg23 with libprint
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 24 May 2023 06:55:54 +0000 |
parents | 8d7dcfd9df53 |
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rev | line source |
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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 } |