root / logic / trunk / measurement_reader / src / drv_comm / dev01 / drv_comm.c @ 72
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1 | 72 | Janez1 | /*
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2 | * ioctl.c − the process to use ioctl's to control the kernel module
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3 | *
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4 | * Until now we could have used cat for input and output. But now
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5 | * we need to do ioctl's, which require writing our own process.
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6 | */
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7 | /*
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8 | * device specifics, such as ioctl numbers and the
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9 | * major device file.
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10 | */
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11 | #include "drv_comm.h" |
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12 | #include "generator.h" |
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13 | #include <stdio.h> |
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14 | #include <stdlib.h> |
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15 | #include <syslog.h> |
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16 | #include <fcntl.h> /* open */ |
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17 | #include <unistd.h> /* exit */ |
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18 | //#include <sys/ioctl.h> /* ioctl */
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19 | /*
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20 | * Functions for the ioctl calls
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21 | */
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22 | ioctl_set_msg_1(int file_desc, char *message) |
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23 | { |
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24 | int ret_val;
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25 | ret_val = ioctl(file_desc, IOCTL_SET_MSG_1, message); |
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26 | if (ret_val < 0) { |
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27 | printf("ioctl_set_msg failed:%d\n", ret_val);
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28 | exit(-1);
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29 | } |
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30 | } |
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31 | |||
32 | ioctl_set_msg_2(int file_desc, char *message) |
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33 | { |
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34 | int ret_val;
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35 | ret_val = ioctl(file_desc, IOCTL_SET_MSG_2, message); |
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36 | if (ret_val < 0) { |
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37 | printf("ioctl_set_msg failed:%d\n", ret_val);
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38 | exit(-1);
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39 | } |
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40 | } |
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41 | |||
42 | ioctl_set_msg_3(int file_desc, char *message) |
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43 | { |
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44 | int ret_val;
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45 | ret_val = ioctl(file_desc, IOCTL_SET_MSG_3, message); |
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46 | if (ret_val < 0) { |
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47 | printf("ioctl_set_msg failed:%d\n", ret_val);
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48 | exit(-1);
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49 | } |
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50 | } |
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51 | |||
52 | ioctl_set_msg_4(int file_desc, char *message) |
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53 | { |
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54 | int ret_val;
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55 | ret_val = ioctl(file_desc, IOCTL_SET_MSG_4, message); |
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56 | if (ret_val < 0) { |
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57 | printf("ioctl_set_msg failed:%d\n", ret_val);
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58 | exit(-1);
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59 | } |
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60 | } |
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61 | |||
62 | ioctl_set_msg_5(int file_desc, char *message) |
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63 | { |
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64 | int ret_val;
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65 | ret_val = ioctl(file_desc, IOCTL_SET_MSG_5, message); |
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66 | if (ret_val < 0) { |
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67 | printf("ioctl_set_msg failed:%d\n", ret_val);
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68 | exit(-1);
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69 | } |
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70 | } |
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71 | |||
72 | ioctl_set_msg_6(int file_desc, char *message) |
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73 | { |
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74 | int ret_val;
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75 | ret_val = ioctl(file_desc, IOCTL_SET_MSG_6, message); |
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76 | if (ret_val < 0) { |
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77 | printf("ioctl_set_msg failed:%d\n", ret_val);
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78 | exit(-1);
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79 | } |
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80 | } |
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81 | |||
82 | void set_device_value(const char *dev, int devIdx) |
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83 | { |
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84 | //TODO use mutex?
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85 | int file_desc;
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86 | |||
87 | char *msg = int_to_str(generate_value());
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88 | |||
89 | file_desc = open(dev, 0);
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90 | |||
91 | if (file_desc < 0) { |
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92 | printf("Can't open device file: %s\n", dev);
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93 | } |
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94 | else{
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95 | //printf("Open device file: %s\n", dev);
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96 | switch(devIdx)
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97 | { |
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98 | case 1: |
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99 | //printf("Setting message dev %d\n", devIdx);
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100 | ioctl_set_msg_1(file_desc, msg); |
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101 | break;
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102 | case 2: |
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103 | //printf("Setting message dev %d\n", devIdx);
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104 | ioctl_set_msg_2(file_desc, msg); |
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105 | break;
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106 | case 3: |
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107 | //printf("Setting message dev %d\n", devIdx);
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108 | ioctl_set_msg_3(file_desc, msg); |
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109 | break;
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110 | case 4: |
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111 | //printf("Setting message dev %d\n", devIdx);
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112 | ioctl_set_msg_4(file_desc, msg); |
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113 | break;
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114 | case 5: |
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115 | //printf("Setting message dev %d\n", devIdx);
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116 | ioctl_set_msg_5(file_desc, msg); |
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117 | break;
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118 | case 6: |
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119 | //printf("Setting message dev %d\n", devIdx);
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120 | ioctl_set_msg_6(file_desc, msg); |
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121 | break;
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122 | |||
123 | } |
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124 | syslog(LOG_MAIL, "%s:%s", dev, msg);
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125 | // TODO syslog
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126 | } |
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127 | |||
128 | close(file_desc); |
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129 | } |