1 | /* |
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2 | * Command parsing routines for RTEMS monitor |
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3 | * |
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4 | * TODO: |
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5 | * |
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6 | * $Id$ |
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7 | */ |
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8 | |
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9 | #include <rtems.h> |
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10 | |
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11 | #include <rtems/monitor.h> |
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12 | |
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13 | #include <stdio.h> |
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14 | #include <string.h> |
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15 | |
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16 | /* |
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17 | * CCJ: 26-3-2000, adding command history and command line |
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18 | * editing. This code is donated from My Right Boot and not |
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19 | * covered by GPL, only the RTEMS license. |
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20 | */ |
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21 | |
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22 | /* |
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23 | * Some key labels to define special keys. |
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24 | */ |
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25 | |
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26 | #define KEYS_EXTENDED (0x8000) |
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27 | #define KEYS_NORMAL_MASK (0x00ff) |
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28 | #define KEYS_INS (0) |
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29 | #define KEYS_DEL (1) |
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30 | #define KEYS_UARROW (2) |
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31 | #define KEYS_DARROW (3) |
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32 | #define KEYS_LARROW (4) |
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33 | #define KEYS_RARROW (5) |
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34 | #define KEYS_HOME (6) |
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35 | #define KEYS_END (7) |
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36 | #define KEYS_F1 (8) |
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37 | #define KEYS_F2 (9) |
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38 | #define KEYS_F3 (10) |
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39 | #define KEYS_F4 (11) |
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40 | #define KEYS_F5 (12) |
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41 | #define KEYS_F6 (13) |
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42 | #define KEYS_F7 (14) |
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43 | #define KEYS_F8 (15) |
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44 | #define KEYS_F9 (16) |
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45 | #define KEYS_F10 (17) |
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46 | |
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47 | #define RTEMS_COMMAND_BUFFER_SIZE (75) |
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48 | |
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49 | static char monitor_prompt[32]; |
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50 | static char buffer[RTEMS_COMMAND_BUFFER_SIZE]; |
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51 | static int pos; |
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52 | static int logged_in; |
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53 | |
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54 | /* |
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55 | * History data. |
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56 | */ |
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57 | |
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58 | #define RTEMS_COMMAND_HISTORIES (20) |
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59 | |
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60 | static char history_buffer[RTEMS_COMMAND_HISTORIES][RTEMS_COMMAND_BUFFER_SIZE]; |
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61 | static int history_pos[RTEMS_COMMAND_HISTORIES]; |
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62 | static int history; |
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63 | static int history_next; |
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64 | |
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65 | /* |
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66 | * Translation tables. Not sure if this is the best way to |
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67 | * handle this, how-ever I wish to avoid the overhead of |
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68 | * including a more complete and standard environment such |
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69 | * as ncurses. |
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70 | */ |
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71 | |
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72 | struct translation_table |
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73 | { |
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74 | char expecting; |
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75 | struct translation_table *branch; |
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76 | unsigned int key; |
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77 | }; |
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78 | |
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79 | static struct translation_table trans_two[] = |
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80 | { |
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81 | { '~', 0, KEYS_INS }, |
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82 | { 0, 0, 0 } |
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83 | }; |
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84 | |
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85 | static struct translation_table trans_three[] = |
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86 | { |
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87 | { '~', 0, KEYS_DEL }, |
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88 | { 0, 0, 0 } |
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89 | }; |
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90 | |
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91 | static struct translation_table trans_tab_csi[] = |
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92 | { |
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93 | { '2', trans_two, 0 }, |
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94 | { '3', trans_three, 0 }, |
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95 | { 'A', 0, KEYS_UARROW }, |
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96 | { 'B', 0, KEYS_DARROW }, |
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97 | { 'D', 0, KEYS_LARROW }, |
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98 | { 'C', 0, KEYS_RARROW }, |
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99 | { 'F', 0, KEYS_END }, |
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100 | { 'H', 0, KEYS_HOME }, |
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101 | { 0, 0, 0 } |
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102 | }; |
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103 | |
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104 | static struct translation_table trans_tab_O[] = |
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105 | { |
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106 | { '1', 0, KEYS_F1 }, |
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107 | { '2', 0, KEYS_F2 }, |
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108 | { '3', 0, KEYS_F3 }, |
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109 | { '4', 0, KEYS_F4 }, |
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110 | { '5', 0, KEYS_F5 }, |
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111 | { '6', 0, KEYS_F6 }, |
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112 | { '7', 0, KEYS_F7 }, |
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113 | { '8', 0, KEYS_F8 }, |
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114 | { '9', 0, KEYS_F9 }, |
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115 | { ':', 0, KEYS_F10 }, |
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116 | { 'P', 0, KEYS_F1 }, |
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117 | { 'Q', 0, KEYS_F2 }, |
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118 | { 'R', 0, KEYS_F3 }, |
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119 | { 'S', 0, KEYS_F4 }, |
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120 | { 'T', 0, KEYS_F5 }, |
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121 | { 'U', 0, KEYS_F6 }, |
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122 | { 'V', 0, KEYS_F7 }, |
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123 | { 'W', 0, KEYS_F8 }, |
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124 | { 'X', 0, KEYS_F9 }, |
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125 | { 'Y', 0, KEYS_F10 }, |
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126 | { 0, 0, 0 } |
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127 | }; |
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128 | |
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129 | static struct translation_table trans_tab[] = |
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130 | { |
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131 | { '[', trans_tab_csi, 0 }, /* CSI command sequences */ |
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132 | { 'O', trans_tab_O, 0 }, /* O are the fuction keys */ |
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133 | { 0, 0, 0 } |
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134 | }; |
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135 | |
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136 | /* |
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137 | * Perform a basic tranlation for some ANSI/VT100 key codes. |
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138 | * This code could do with a timeout on the ESC as it is |
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139 | * now lost from the input stream. It is not* used by the |
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140 | * line editor below so considiered not worth the effort. |
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141 | */ |
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142 | |
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143 | static unsigned int |
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144 | rtems_monitor_getchar ( |
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145 | ) |
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146 | { |
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147 | struct translation_table *translation = 0; |
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148 | for (;;) |
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149 | { |
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150 | char c = getchar (); |
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151 | if (c == 27) |
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152 | translation = trans_tab; |
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153 | else |
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154 | { |
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155 | /* |
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156 | * If no translation happing just pass through |
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157 | * and return the key. |
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158 | */ |
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159 | if (translation) |
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160 | { |
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161 | /* |
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162 | * Scan the current table for the key, and if found |
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163 | * see if this key is a fork. If so follow it and |
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164 | * wait else return the extended key. |
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165 | */ |
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166 | int index = 0; |
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167 | int branched = 0; |
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168 | while ((translation[index].expecting != '\0') || |
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169 | (translation[index].key != '\0')) |
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170 | { |
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171 | if (translation[index].expecting == c) |
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172 | { |
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173 | /* |
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174 | * A branch is take if more keys are to come. |
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175 | */ |
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176 | if (translation[index].branch == 0) |
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177 | return KEYS_EXTENDED | translation[index].key; |
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178 | else |
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179 | { |
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180 | translation = translation[index].branch; |
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181 | branched = 1; |
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182 | break; |
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183 | } |
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184 | } |
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185 | index++; |
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186 | } |
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187 | /* |
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188 | * Who knows what these keys are, just drop them. |
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189 | */ |
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190 | if (!branched) |
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191 | translation = 0; |
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192 | } |
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193 | else |
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194 | return c; |
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195 | } |
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196 | } |
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197 | } |
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198 | |
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199 | /* |
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200 | * The line editor with history. |
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201 | */ |
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202 | |
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203 | static int |
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204 | rtems_monitor_line_editor ( |
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205 | char *command |
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206 | ) |
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207 | { |
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208 | int repeating = 0; |
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209 | |
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210 | memset (buffer, 0, RTEMS_COMMAND_BUFFER_SIZE); |
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211 | history = history_next; |
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212 | pos = 0; |
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213 | |
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214 | if (!logged_in) |
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215 | printf ("\nMonitor ready, press enter to login.\n\n"); |
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216 | else |
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217 | printf ("%s $ ", monitor_prompt); |
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218 | |
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219 | while (1) |
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220 | { |
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221 | unsigned int extended_key = rtems_monitor_getchar (); |
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222 | char c = extended_key & KEYS_NORMAL_MASK; |
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223 | |
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224 | /* |
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225 | * Make the extended_key usable as a boolean. |
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226 | */ |
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227 | extended_key &= ~KEYS_NORMAL_MASK; |
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228 | |
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229 | if (!extended_key && !logged_in) |
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230 | { |
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231 | if (c == '\n') |
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232 | { |
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233 | logged_in = 1; |
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234 | /* |
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235 | * The prompt has changed from `>' to `$' to help know |
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236 | * which version of the monitor code people are using. |
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237 | */ |
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238 | printf("%s $ ", monitor_prompt); |
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239 | } |
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240 | } |
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241 | else |
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242 | { |
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243 | if (extended_key) |
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244 | { |
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245 | switch (c) |
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246 | { |
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247 | case KEYS_END: |
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248 | printf (buffer + pos); |
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249 | pos = (int) strlen (buffer); |
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250 | break; |
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251 | |
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252 | case KEYS_HOME: |
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253 | printf ("\r%s $ ", monitor_prompt); |
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254 | pos = 0; |
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255 | break; |
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256 | |
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257 | case KEYS_LARROW: |
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258 | if (pos > 0) |
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259 | { |
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260 | pos--; |
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261 | putchar ('\b'); |
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262 | } |
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263 | break; |
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264 | |
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265 | case KEYS_RARROW: |
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266 | if ((pos < RTEMS_COMMAND_BUFFER_SIZE) && (buffer[pos] != '\0')) |
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267 | { |
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268 | putchar (buffer[pos]); |
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269 | pos++; |
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270 | } |
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271 | break; |
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272 | |
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273 | case KEYS_UARROW: |
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274 | /* |
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275 | * If we are moving up the histories then we need to save the working |
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276 | * buffer. |
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277 | */ |
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278 | if (history) |
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279 | { |
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280 | int end; |
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281 | int bs; |
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282 | if (history == history_next) |
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283 | { |
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284 | memcpy (history_buffer[history_next], buffer, |
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285 | RTEMS_COMMAND_BUFFER_SIZE); |
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286 | history_pos[history_next] = pos; |
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287 | } |
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288 | history--; |
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289 | memcpy (buffer, history_buffer[history], |
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290 | RTEMS_COMMAND_BUFFER_SIZE); |
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291 | pos = history_pos[history]; |
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292 | printf ("\r%*c", RTEMS_COMMAND_BUFFER_SIZE, ' '); |
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293 | printf ("\r%s $ %s", monitor_prompt, buffer); |
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294 | end = (int) strlen (buffer); |
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295 | for (bs = 0; bs < (end - pos); bs++) |
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296 | putchar ('\b'); |
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297 | } |
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298 | break; |
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299 | |
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300 | case KEYS_DARROW: |
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301 | if (history < history_next) |
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302 | { |
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303 | int end; |
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304 | int bs; |
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305 | history++; |
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306 | memcpy (buffer, history_buffer[history], |
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307 | RTEMS_COMMAND_BUFFER_SIZE); |
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308 | pos = history_pos[history]; |
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309 | printf ("\r%*c", RTEMS_COMMAND_BUFFER_SIZE, ' '); |
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310 | printf ("\r%s $ %s", monitor_prompt, buffer); |
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311 | end = (int) strlen (buffer); |
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312 | for (bs = 0; bs < (end - pos); bs++) |
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313 | putchar ('\b'); |
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314 | } |
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315 | break; |
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316 | |
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317 | case KEYS_DEL: |
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318 | if (buffer[pos] != '\0') |
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319 | { |
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320 | int end; |
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321 | int bs; |
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322 | strcpy (&buffer[pos], &buffer[pos + 1]); |
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323 | printf ("\r%s $ %s", monitor_prompt, buffer); |
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324 | end = (int) strlen (buffer); |
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325 | for (bs = 0; bs < (end - pos); bs++) |
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326 | putchar ('\b'); |
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327 | } |
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328 | break; |
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329 | } |
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330 | } |
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331 | else |
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332 | { |
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333 | switch (c) |
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334 | { |
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335 | case '\b': |
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336 | case '\x7e': |
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337 | case '\x7f': |
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338 | if (pos > 0) |
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339 | { |
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340 | int bs; |
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341 | pos--; |
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342 | strcpy (buffer + pos, buffer + pos + 1); |
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343 | printf ("\b%s \b", buffer + pos); |
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344 | for (bs = 0; bs < ((int) strlen (buffer) - pos); bs++) |
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345 | putchar ('\b'); |
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346 | } |
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347 | break; |
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348 | |
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349 | case '\n': |
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350 | /* |
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351 | * Process the command. |
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352 | */ |
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353 | printf ("\n"); |
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354 | repeating = 1; |
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355 | /* |
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356 | * Only process the history if we have a command and |
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357 | *a history. |
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358 | */ |
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359 | if (strlen (buffer)) |
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360 | { |
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361 | if (history_next && (history == history_next)) |
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362 | { |
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363 | /* |
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364 | * Do not place the last command into the history |
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365 | *if the same. |
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366 | */ |
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367 | if (strcmp (history_buffer[history_next - 1], buffer)) |
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368 | repeating = 0; |
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369 | } |
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370 | else |
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371 | repeating = 0; |
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372 | } |
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373 | if (!repeating) |
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374 | { |
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375 | memcpy (history_buffer[history_next], buffer, |
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376 | RTEMS_COMMAND_BUFFER_SIZE); |
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377 | history_pos[history_next] = pos; |
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378 | if (history_next < (RTEMS_COMMAND_HISTORIES - 1)) |
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379 | history_next++; |
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380 | else |
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381 | { |
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382 | memmove (history_buffer[0], history_buffer[1], |
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383 | RTEMS_COMMAND_BUFFER_SIZE * (RTEMS_COMMAND_HISTORIES - 1)); |
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384 | memmove (&history_pos[0], &history_pos[1], |
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385 | sizeof (history_pos[0]) * (RTEMS_COMMAND_HISTORIES - 1)); |
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386 | } |
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387 | } |
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388 | else |
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389 | { |
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390 | if (history_next) |
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391 | memcpy (buffer, history_buffer[history_next - 1], |
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392 | RTEMS_COMMAND_BUFFER_SIZE); |
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393 | } |
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394 | memmove (command, buffer, RTEMS_COMMAND_BUFFER_SIZE); |
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395 | return repeating; |
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396 | break; |
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397 | |
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398 | default: |
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399 | if ((pos < (RTEMS_COMMAND_BUFFER_SIZE - 1)) && |
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400 | (c >= ' ') && (c <= 'z')) |
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401 | { |
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402 | int end; |
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403 | if (c >= 'A' && c <= 'Z') |
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404 | c += 'a' - 'A'; |
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405 | end = strlen (buffer); |
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406 | if ((pos < end) && (end < RTEMS_COMMAND_BUFFER_SIZE)) |
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407 | { |
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408 | int ch, bs; |
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409 | for (ch = end + 1; ch > pos; ch--) |
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410 | buffer[ch] = buffer[ch - 1]; |
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411 | printf (buffer + pos); |
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412 | for (bs = 0; bs < (end - pos + 1); bs++) |
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413 | putchar ('\b'); |
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414 | } |
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415 | buffer[pos++] = c; |
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416 | if (pos > end) |
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417 | buffer[pos] = '\0'; |
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418 | putchar (c); |
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419 | } |
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420 | break; |
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421 | } |
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422 | } |
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423 | } |
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424 | } |
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425 | } |
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426 | |
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427 | /* |
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428 | * make_argv(cp): token-count |
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429 | * Break up the command line in 'cp' into global argv[] and argc (return |
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430 | * value). |
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431 | */ |
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432 | |
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433 | int |
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434 | rtems_monitor_make_argv( |
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435 | char *cp, |
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436 | int *argc_p, |
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437 | char **argv) |
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438 | { |
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439 | int argc = 0; |
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440 | |
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441 | while ((cp = strtok(cp, " \t\n\r"))) |
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442 | { |
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443 | argv[argc++] = cp; |
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444 | cp = (char *) NULL; |
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445 | } |
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446 | argv[argc] = (char *) NULL; /* end of argv */ |
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447 | |
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448 | return *argc_p = argc; |
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449 | } |
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450 | |
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451 | |
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452 | /* |
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453 | * Read and break up a monitor command |
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454 | * |
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455 | * We have to loop on the gets call, since it will return NULL under UNIX |
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456 | * RTEMS when we get a signal (eg: SIGALRM). |
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457 | */ |
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458 | |
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459 | int |
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460 | rtems_monitor_command_read(char *command, |
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461 | int *argc, |
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462 | char **argv) |
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463 | { |
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464 | /* |
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465 | * put node number in the prompt if we are multiprocessing |
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466 | */ |
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467 | |
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468 | if (!rtems_configuration_get_user_multiprocessing_table ()) |
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469 | sprintf (monitor_prompt, "%s", MONITOR_PROMPT); |
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470 | else if (rtems_monitor_default_node != rtems_monitor_node) |
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471 | sprintf (monitor_prompt, "%d-%s-%d", rtems_monitor_node, |
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472 | MONITOR_PROMPT, rtems_monitor_default_node); |
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473 | else |
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474 | sprintf (monitor_prompt, "%d-%s", rtems_monitor_node, MONITOR_PROMPT); |
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475 | |
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476 | #ifdef RTEMS_UNIX |
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477 | /* RTEMS on unix gets so many interrupt system calls this is hosed */ |
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478 | printf ("%s> ", monitor_prompt); |
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479 | fflush (stdout); |
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480 | while (gets(command) == (char *) 0) |
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481 | ; |
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482 | #else |
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483 | rtems_monitor_line_editor (command); |
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484 | #endif |
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485 | |
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486 | return rtems_monitor_make_argv (command, argc, argv); |
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487 | } |
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488 | |
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489 | /* |
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490 | * Look up a command in a command table |
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491 | * |
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492 | */ |
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493 | |
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494 | rtems_monitor_command_entry_t * |
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495 | rtems_monitor_command_lookup( |
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496 | rtems_monitor_command_entry_t *table, |
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497 | int argc, |
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498 | char **argv |
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499 | ) |
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500 | { |
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501 | char *command; |
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502 | |
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503 | command = argv[0]; |
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504 | |
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505 | if ((table == 0) || (command == 0)) |
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506 | return 0; |
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507 | |
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508 | while (table) |
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509 | { |
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510 | if (table->command) |
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511 | { |
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512 | if (STREQ (command, table->command)) /* exact match */ |
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513 | { |
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514 | if (table->command_function == 0) |
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515 | return 0; |
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516 | return table; |
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517 | } |
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518 | } |
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519 | table = table->next; |
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520 | } |
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521 | |
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522 | return 0; |
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523 | } |
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524 | |
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525 | void |
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526 | rtems_monitor_show_help ( |
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527 | rtems_monitor_command_entry_t *help_cmd, |
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528 | int max_cmd_len |
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529 | ) |
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530 | { |
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531 | #define MAX_HELP_LINE_LENGTH (75 - max_cmd_len - 2) |
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532 | |
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533 | if (help_cmd && help_cmd->command) |
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534 | { |
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535 | const char *help = help_cmd->usage; |
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536 | int help_len = strlen (help); |
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537 | int spaces = max_cmd_len - strlen (help_cmd->command); |
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538 | int show_this_line = 0; |
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539 | int line_one = 1; |
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540 | int c; |
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541 | |
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542 | printf ("%s", help_cmd->command); |
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543 | |
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544 | if (help_len == 0) |
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545 | { |
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546 | printf (" - No help associated.\n"); |
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547 | return; |
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548 | } |
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549 | |
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550 | while (help_len) |
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551 | { |
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552 | printf ("%*c", spaces, ' '); |
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553 | |
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554 | if (line_one) |
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555 | printf (" - "); |
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556 | |
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557 | spaces = max_cmd_len + 2; |
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558 | line_one = 0; |
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559 | |
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560 | /* |
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561 | * See if greater then the line length if so, work back |
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562 | * from the end for a space, tab or lf or cr. |
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563 | */ |
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564 | |
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565 | if (help_len > MAX_HELP_LINE_LENGTH) |
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566 | { |
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567 | for (show_this_line = MAX_HELP_LINE_LENGTH - 1; |
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568 | show_this_line; |
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569 | show_this_line--) |
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570 | if ((help[show_this_line] == ' ') || |
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571 | (help[show_this_line] == '\n') || |
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572 | (help[show_this_line] == '\r')) |
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573 | break; |
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574 | |
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575 | /* |
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576 | * If show_this_line is 0, it is a very long word !! |
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577 | */ |
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578 | |
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579 | if (show_this_line == 0) |
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580 | show_this_line = MAX_HELP_LINE_LENGTH - 1; |
---|
581 | } |
---|
582 | else |
---|
583 | show_this_line = help_len; |
---|
584 | |
---|
585 | for (c = 0; c < show_this_line; c++) |
---|
586 | if ((help[c] == '\r') || (help[c] == '\n')) |
---|
587 | show_this_line = c; |
---|
588 | else |
---|
589 | putchar (help[c]); |
---|
590 | |
---|
591 | printf ("\n"); |
---|
592 | |
---|
593 | help += show_this_line; |
---|
594 | help_len -= show_this_line; |
---|
595 | |
---|
596 | /* |
---|
597 | * Move past the line feeds or what ever else is being skipped. |
---|
598 | */ |
---|
599 | |
---|
600 | while (help_len) |
---|
601 | { |
---|
602 | if ((*help != '\r') && (*help != '\n')) |
---|
603 | break; |
---|
604 | |
---|
605 | if (*help != ' ') |
---|
606 | { |
---|
607 | help++; |
---|
608 | help_len--; |
---|
609 | break; |
---|
610 | } |
---|
611 | help++; |
---|
612 | help_len--; |
---|
613 | } |
---|
614 | } |
---|
615 | } |
---|
616 | } |
---|
617 | |
---|
618 | void |
---|
619 | rtems_monitor_command_usage( |
---|
620 | rtems_monitor_command_entry_t *table, |
---|
621 | char *command_string |
---|
622 | ) |
---|
623 | { |
---|
624 | rtems_monitor_command_entry_t *command = table; |
---|
625 | int max_cmd_len = 0; |
---|
626 | |
---|
627 | /* if first entry in table is a usage, then print it out */ |
---|
628 | |
---|
629 | if (command_string && (*command_string != '\0')) |
---|
630 | { |
---|
631 | char *argv[2]; |
---|
632 | |
---|
633 | argv[0] = command_string; |
---|
634 | argv[1] = 0; |
---|
635 | |
---|
636 | command = rtems_monitor_command_lookup (table, 1, argv); |
---|
637 | |
---|
638 | if (command) |
---|
639 | rtems_monitor_show_help (command, strlen (command_string)); |
---|
640 | else |
---|
641 | printf ("Unrecognised command; try just 'help'\n"); |
---|
642 | return; |
---|
643 | } |
---|
644 | |
---|
645 | /* |
---|
646 | * Find the largest command size. |
---|
647 | */ |
---|
648 | |
---|
649 | while (command) |
---|
650 | { |
---|
651 | int len = strlen (command->command); |
---|
652 | |
---|
653 | if (len > max_cmd_len) |
---|
654 | max_cmd_len = len; |
---|
655 | |
---|
656 | command = command->next; |
---|
657 | } |
---|
658 | |
---|
659 | max_cmd_len++; |
---|
660 | |
---|
661 | command = table; |
---|
662 | |
---|
663 | /* |
---|
664 | * Now some nice formatting for the help. |
---|
665 | */ |
---|
666 | |
---|
667 | while (command) |
---|
668 | { |
---|
669 | rtems_monitor_show_help (command, max_cmd_len); |
---|
670 | command = command->next; |
---|
671 | } |
---|
672 | } |
---|
673 | |
---|
674 | |
---|
675 | void |
---|
676 | rtems_monitor_help_cmd( |
---|
677 | int argc, |
---|
678 | char **argv, |
---|
679 | unsigned32 command_arg, |
---|
680 | boolean verbose |
---|
681 | ) |
---|
682 | { |
---|
683 | int arg; |
---|
684 | rtems_monitor_command_entry_t *command; |
---|
685 | |
---|
686 | command = (rtems_monitor_command_entry_t *) command_arg; |
---|
687 | |
---|
688 | if (argc == 1) |
---|
689 | rtems_monitor_command_usage(command, 0); |
---|
690 | else |
---|
691 | { |
---|
692 | for (arg = 1; argv[arg]; arg++) |
---|
693 | rtems_monitor_command_usage(command, argv[arg]); |
---|
694 | } |
---|
695 | } |
---|