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 "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 | * make_argv(cp): token-count |
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18 | * Break up the command line in 'cp' into global argv[] and argc (return |
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19 | * value). |
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20 | */ |
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21 | |
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22 | int |
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23 | rtems_monitor_make_argv( |
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24 | char *cp, |
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25 | int *argc_p, |
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26 | char **argv) |
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27 | { |
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28 | int argc = 0; |
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29 | |
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30 | while ((cp = strtok(cp, " \t\n\r"))) |
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31 | { |
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32 | argv[argc++] = cp; |
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33 | cp = (char *) NULL; |
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34 | } |
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35 | argv[argc] = (char *) NULL; /* end of argv */ |
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36 | |
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37 | return *argc_p = argc; |
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38 | } |
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39 | |
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40 | |
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41 | /* |
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42 | * Read and break up a monitor command |
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43 | * |
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44 | * We have to loop on the gets call, since it will return NULL under UNIX |
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45 | * RTEMS when we get a signal (eg: SIGALRM). |
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46 | */ |
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47 | |
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48 | int |
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49 | rtems_monitor_command_read(char *command, |
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50 | int *argc, |
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51 | char **argv) |
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52 | { |
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53 | extern rtems_configuration_table BSP_Configuration; |
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54 | static char monitor_prompt[32]; |
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55 | |
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56 | /* |
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57 | * put node number in the prompt if we are multiprocessing |
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58 | */ |
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59 | |
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60 | if (BSP_Configuration.User_multiprocessing_table == 0) |
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61 | sprintf(monitor_prompt, "%s", MONITOR_PROMPT); |
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62 | else if (rtems_monitor_default_node != rtems_monitor_node) |
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63 | sprintf(monitor_prompt, "%d-%s-%d", rtems_monitor_node, MONITOR_PROMPT, rtems_monitor_default_node); |
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64 | else |
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65 | sprintf(monitor_prompt, "%d-%s", rtems_monitor_node, MONITOR_PROMPT); |
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66 | |
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67 | #ifdef RTEMS_UNIX |
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68 | /* RTEMS on unix gets so many interrupt system calls this is hosed */ |
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69 | printf("%s> ", monitor_prompt); |
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70 | fflush(stdout); |
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71 | while (gets(command) == (char *) 0) |
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72 | ; |
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73 | #else |
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74 | do |
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75 | { |
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76 | printf("%s> ", monitor_prompt); |
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77 | fflush(stdout); |
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78 | } while (gets(command) == (char *) 0); |
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79 | #endif |
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80 | |
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81 | return rtems_monitor_make_argv(command, argc, argv); |
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82 | } |
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83 | |
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84 | /* |
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85 | * Look up a command in a command table |
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86 | * |
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87 | */ |
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88 | |
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89 | rtems_monitor_command_entry_t * |
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90 | rtems_monitor_command_lookup( |
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91 | rtems_monitor_command_entry_t *table, |
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92 | int argc, |
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93 | char **argv |
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94 | ) |
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95 | { |
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96 | rtems_monitor_command_entry_t *p; |
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97 | rtems_monitor_command_entry_t *abbreviated_match = 0; |
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98 | int abbreviated_matches = 0; |
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99 | char *command; |
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100 | int command_length; |
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101 | |
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102 | command = argv[0]; |
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103 | |
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104 | if ((table == 0) || (command == 0)) |
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105 | goto failed; |
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106 | |
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107 | command_length = strlen(command); |
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108 | |
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109 | for (p = table; p->command; p++) |
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110 | if (STREQ(command, p->command)) /* exact match */ |
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111 | goto done; |
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112 | else if (STRNEQ(command, p->command, command_length)) |
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113 | { |
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114 | abbreviated_matches++; |
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115 | abbreviated_match = p; |
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116 | } |
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117 | |
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118 | /* no perfect match; is there a non-ambigous abbreviated match? */ |
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119 | if ( ! abbreviated_match) |
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120 | { |
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121 | printf("Unrecognized command '%s'; try 'help'\n", command); |
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122 | goto failed; |
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123 | } |
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124 | |
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125 | if (abbreviated_matches > 1) |
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126 | { |
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127 | printf("Command '%s' is ambiguous; try 'help'\n", command); |
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128 | goto failed; |
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129 | } |
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130 | |
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131 | p = abbreviated_match; |
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132 | |
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133 | done: |
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134 | if (p->command_function == 0) |
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135 | goto failed; |
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136 | return p; |
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137 | |
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138 | failed: |
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139 | return 0; |
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140 | } |
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141 | |
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142 | void |
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143 | rtems_monitor_command_usage(rtems_monitor_command_entry_t *table, |
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144 | char *command_string) |
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145 | { |
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146 | rtems_monitor_command_entry_t *help = 0; |
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147 | char *help_command_argv[2]; |
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148 | |
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149 | /* if first entry in table is a usage, then print it out */ |
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150 | if (command_string == 0) |
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151 | { |
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152 | if (STREQ(table->command, "--usage--") && table->usage) |
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153 | help = table; |
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154 | } |
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155 | else |
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156 | { |
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157 | help_command_argv[0] = command_string; |
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158 | help_command_argv[1] = 0; |
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159 | help = rtems_monitor_command_lookup(table, 1, help_command_argv); |
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160 | } |
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161 | |
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162 | if (help) |
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163 | printf("%s\n", help->usage); |
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164 | } |
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165 | |
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166 | |
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167 | void |
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168 | rtems_monitor_help_cmd( |
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169 | int argc, |
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170 | char **argv, |
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171 | unsigned32 command_arg, |
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172 | boolean verbose |
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173 | ) |
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174 | { |
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175 | int arg; |
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176 | rtems_monitor_command_entry_t *command; |
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177 | |
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178 | command = (rtems_monitor_command_entry_t *) command_arg; |
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179 | |
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180 | if (argc == 1) |
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181 | rtems_monitor_command_usage(command, 0); |
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182 | else |
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183 | { |
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184 | for (arg=1; argv[arg]; arg++) |
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185 | rtems_monitor_command_usage(command, argv[arg]); |
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186 | } |
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187 | } |
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