FreeCalypso > hg > freecalypso-sw
annotate loadtools/tpinterf2.c @ 823:d93ecff8544b
aci: psa_mms.c imported from TCS211 version
author | Space Falcon <falcon@ivan.Harhan.ORG> |
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date | Sun, 05 Apr 2015 20:45:18 +0000 |
parents | 05af070c4b60 |
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rev | line source |
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1 /* |
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2 * This module provides a more advanced target interface function |
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3 * than tpinterf.c - programmatic capture of target responses, |
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4 * for dumps etc. It will be linked by fc-loadtool, but not fc-chainload. |
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5 */ |
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6 |
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7 #include <sys/types.h> |
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8 #include <sys/time.h> |
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9 #include <sys/errno.h> |
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10 #include <stdio.h> |
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11 #include <string.h> |
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12 #include <strings.h> |
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13 #include <stdlib.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 /* |
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20 * This functions reads the serial output from the target until a |
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21 * '=' prompt is received. All intermediate output is parsed into |
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22 * lines and passed to a callback function. |
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23 * |
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24 * The callback function is called with a pointer to each received |
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25 * line, stored in a buffer ending in NUL, with CRLF stripped. |
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26 * The callback function is expected to return an int. If the |
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27 * callback return value is negative, this function returns immediately |
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28 * with that negative value. If the callback return value is positive |
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29 * or zero, it is added to an accumulator. |
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30 * |
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31 * Termination: this function returns when it has received a '=' at |
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32 * the beginning of a line (return value is the callback return |
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33 * accumulator, or 0 if no lines came), if the callback returns a |
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34 * negative value (that value is returned), or if an error is detected |
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35 * within this function (return value -1, and an error message |
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36 * printed on stderr). |
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37 */ |
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38 tpinterf_capture_output(timeout, callback) |
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39 int timeout; /* seconds */ |
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40 int (*callback)(); |
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41 { |
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42 char buf[512], *cp; |
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43 char line[1024], *dp = line; |
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44 fd_set fds; |
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45 struct timeval tv; |
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46 int cc, linelen = 0; |
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47 int totout = 0, cbret; |
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48 |
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49 for (;;) { |
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50 FD_ZERO(&fds); |
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51 FD_SET(target_fd, &fds); |
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52 tv.tv_sec = timeout; |
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53 tv.tv_usec = 0; |
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54 cc = select(target_fd+1, &fds, NULL, NULL, &tv); |
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55 if (cc < 0) { |
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56 if (errno == EINTR) |
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57 continue; |
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58 perror("select"); |
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59 return(-1); |
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60 } |
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61 if (cc < 1) { |
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62 fprintf(stderr, |
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63 "error: timeout waiting for \'=\' prompt from target\n"); |
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64 return(-1); |
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65 } |
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66 cc = read(target_fd, buf, sizeof buf); |
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67 if (cc <= 0) { |
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68 perror("read after successful select"); |
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69 return(-1); |
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70 } |
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71 for (cp = buf; cc; cp++) { |
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72 cc--; |
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73 if (*cp == '=' && !linelen && !cc) |
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74 return(totout); |
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75 if (*cp == '\r') |
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76 continue; |
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77 if (*cp == '\n') { |
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78 *dp = '\0'; |
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79 cbret = callback(line); |
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80 if (cbret < 0) |
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81 return(cbret); |
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82 totout += cbret; |
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83 dp = line; |
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84 linelen = 0; |
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85 continue; |
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86 } |
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87 *dp++ = *cp; |
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88 linelen++; |
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89 if (linelen >= sizeof line) { |
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90 fprintf(stderr, |
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91 "error: target response line length exceeds buffer\n"); |
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92 return(-1); |
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93 } |
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94 } |
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95 } |
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96 } |
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97 |
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98 /* single line response capture mechanism */ |
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99 /* same line buffer size as in tpinterf_capture_output() */ |
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100 char target_response_line[1024]; |
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101 |
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102 static |
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103 oneline_catcher(linein) |
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104 char *linein; |
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105 { |
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106 strcpy(target_response_line, linein); |
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107 return(1); |
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108 } |
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109 |
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110 tpinterf_capture_output_oneline(timeout) |
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111 { |
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112 return tpinterf_capture_output(timeout, oneline_catcher); |
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113 } |