1 | /* |
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2 | * |
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3 | * Instantatiate a new terminal shell. |
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4 | * |
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5 | * Author: |
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6 | * |
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7 | * WORK: fernando.ruiz@ctv.es |
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8 | * HOME: correo@fernando-ruiz.com |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.com/license/LICENSE. |
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13 | * |
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14 | * $Id$ |
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15 | */ |
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16 | |
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17 | #ifdef HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <stdio.h> |
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22 | #include <time.h> |
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23 | |
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24 | #include <rtems.h> |
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25 | #include <rtems/error.h> |
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26 | #include <rtems/libio.h> |
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27 | #include <rtems/libio_.h> |
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28 | #include <rtems/system.h> |
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29 | #include <rtems/shell.h> |
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30 | #include <rtems/shellconfig.h> |
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31 | #include <rtems/console.h> |
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32 | #include "internal.h" |
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33 | |
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34 | #include <termios.h> |
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35 | #include <string.h> |
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36 | #include <stdlib.h> |
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37 | #include <ctype.h> |
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38 | #include <sys/stat.h> |
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39 | #include <unistd.h> |
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40 | #include <errno.h> |
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41 | #include <pwd.h> |
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42 | |
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43 | rtems_shell_env_t rtems_global_shell_env = { |
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44 | .magic = rtems_build_name('S', 'E', 'N', 'V'), |
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45 | .devname = CONSOLE_DEVICE_NAME, |
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46 | .taskname = "SHGL", |
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47 | .exit_shell = false, |
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48 | .forever = true, |
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49 | .errorlevel = -1, |
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50 | .echo = false, |
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51 | .cwd = "/", |
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52 | .input = NULL, |
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53 | .output = NULL, |
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54 | .output_append = false, |
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55 | .wake_on_end = RTEMS_ID_NONE, |
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56 | .login_check = NULL |
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57 | }; |
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58 | |
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59 | rtems_shell_env_t *rtems_current_shell_env = &rtems_global_shell_env; |
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60 | |
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61 | /* |
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62 | * Initialize the shell user/process environment information |
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63 | */ |
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64 | rtems_shell_env_t *rtems_shell_init_env( |
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65 | rtems_shell_env_t *shell_env_p |
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66 | ) |
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67 | { |
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68 | rtems_shell_env_t *shell_env; |
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69 | |
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70 | shell_env = malloc(sizeof(rtems_shell_env_t)); |
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71 | if ( !shell_env ) |
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72 | return NULL; |
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73 | if ( !shell_env_p ) { |
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74 | *shell_env = rtems_global_shell_env; |
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75 | } else { |
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76 | *shell_env = *shell_env_p; |
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77 | } |
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78 | shell_env->taskname = NULL; |
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79 | |
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80 | return shell_env; |
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81 | } |
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82 | |
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83 | /* |
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84 | * Completely free a shell_env_t and all associated memory |
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85 | */ |
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86 | void rtems_shell_env_free( |
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87 | void *ptr |
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88 | ) |
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89 | { |
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90 | rtems_shell_env_t *shell_env; |
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91 | shell_env = (rtems_shell_env_t *) ptr; |
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92 | |
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93 | if ( !ptr ) |
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94 | return; |
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95 | |
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96 | if ( shell_env->input ) |
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97 | free((void *)shell_env->input); |
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98 | if ( shell_env->output ) |
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99 | free((void *)shell_env->output); |
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100 | free( ptr ); |
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101 | } |
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102 | |
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103 | /* |
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104 | * Get a line of user input with modest features |
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105 | */ |
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106 | int rtems_shell_line_editor( |
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107 | char *cmds[], |
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108 | int count, |
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109 | int size, |
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110 | const char *prompt, |
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111 | FILE *in, |
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112 | FILE *out |
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113 | ) |
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114 | { |
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115 | unsigned int extended_key; |
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116 | int c; |
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117 | int col; |
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118 | int last_col; |
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119 | int output; |
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120 | char line[size]; |
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121 | char new_line[size]; |
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122 | int up; |
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123 | int cmd = -1; |
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124 | int inserting = 1; |
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125 | |
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126 | output = (out && isatty(fileno(in))); |
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127 | |
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128 | col = last_col = 0; |
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129 | |
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130 | tcdrain(fileno(in)); |
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131 | if (out) |
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132 | tcdrain(fileno(out)); |
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133 | |
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134 | if (output && prompt) |
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135 | fprintf(out, "\r%s", prompt); |
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136 | |
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137 | line[0] = 0; |
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138 | new_line[0] = 0; |
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139 | |
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140 | for (;;) { |
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141 | |
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142 | if (output) |
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143 | fflush(out); |
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144 | |
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145 | extended_key = rtems_shell_getchar(in); |
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146 | |
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147 | if (extended_key == EOF) |
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148 | return -2; |
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149 | |
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150 | c = extended_key & RTEMS_SHELL_KEYS_NORMAL_MASK; |
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151 | |
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152 | /* |
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153 | * Make the extended_key usable as a boolean. |
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154 | */ |
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155 | extended_key &= ~RTEMS_SHELL_KEYS_NORMAL_MASK; |
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156 | |
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157 | up = 0; |
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158 | |
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159 | if (extended_key) |
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160 | { |
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161 | switch (c) |
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162 | { |
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163 | case RTEMS_SHELL_KEYS_END: |
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164 | if (output) |
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165 | fprintf(out, "%s", line + col); |
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166 | col = (int) strlen (line); |
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167 | break; |
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168 | |
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169 | case RTEMS_SHELL_KEYS_HOME: |
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170 | if (output) { |
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171 | if (prompt) |
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172 | fprintf(out,"\r%s", prompt); |
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173 | } |
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174 | col = 0; |
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175 | break; |
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176 | |
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177 | case RTEMS_SHELL_KEYS_LARROW: |
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178 | if (col > 0) |
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179 | { |
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180 | col--; |
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181 | if (output) |
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182 | fputc('\b', out); |
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183 | } |
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184 | break; |
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185 | |
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186 | case RTEMS_SHELL_KEYS_RARROW: |
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187 | if ((col < size) && (line[col] != '\0')) |
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188 | { |
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189 | if (output) |
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190 | fprintf(out, "%c", line[col]); |
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191 | col++; |
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192 | } |
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193 | break; |
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194 | |
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195 | case RTEMS_SHELL_KEYS_UARROW: |
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196 | if ((cmd >= (count - 1)) || (strlen(cmds[cmd + 1]) == 0)) { |
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197 | if (output) |
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198 | fputc('\x7', out); |
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199 | break; |
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200 | } |
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201 | |
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202 | up = 1; |
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203 | |
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204 | /* drop through */ |
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205 | case RTEMS_SHELL_KEYS_DARROW: |
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206 | |
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207 | { |
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208 | int last_cmd = cmd; |
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209 | int clen = strlen (line); |
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210 | |
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211 | if (prompt) |
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212 | clen += strlen(prompt); |
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213 | |
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214 | if (up) { |
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215 | cmd++; |
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216 | } else { |
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217 | if (cmd < 0) { |
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218 | if (output) |
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219 | fprintf(out, "\x7"); |
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220 | break; |
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221 | } |
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222 | else |
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223 | cmd--; |
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224 | } |
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225 | |
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226 | if ((last_cmd < 0) || (strcmp(cmds[last_cmd], line) != 0)) |
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227 | memcpy (new_line, line, size); |
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228 | |
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229 | if (cmd < 0) |
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230 | memcpy (line, new_line, size); |
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231 | else |
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232 | memcpy (line, cmds[cmd], size); |
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233 | |
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234 | col = strlen (line); |
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235 | |
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236 | if (output) { |
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237 | fprintf(out,"\r%*c", clen, ' '); |
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238 | fprintf(out,"\r%s%s", prompt, line); |
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239 | } |
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240 | } |
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241 | break; |
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242 | |
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243 | case RTEMS_SHELL_KEYS_DEL: |
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244 | if (line[col] != '\0') |
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245 | { |
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246 | int end; |
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247 | int bs; |
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248 | strcpy (&line[col], &line[col + 1]); |
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249 | if (output) { |
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250 | fprintf(out,"\r%s%s ", prompt, line); |
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251 | end = (int) strlen (line); |
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252 | for (bs = 0; bs < ((end - col) + 1); bs++) |
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253 | fputc('\b', out); |
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254 | } |
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255 | } |
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256 | break; |
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257 | |
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258 | case RTEMS_SHELL_KEYS_INS: |
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259 | inserting = inserting ? 0 : 1; |
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260 | break; |
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261 | } |
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262 | } |
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263 | else |
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264 | { |
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265 | switch (c) |
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266 | { |
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267 | case 1:/*Control-a*/ |
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268 | if (output) { |
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269 | if (prompt) |
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270 | fprintf(out,"\r%s", prompt); |
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271 | } |
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272 | col = 0; |
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273 | break; |
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274 | |
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275 | case 5:/*Control-e*/ |
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276 | if (output) |
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277 | fprintf(out, "%s", line + col); |
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278 | col = (int) strlen (line); |
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279 | break; |
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280 | |
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281 | case 11:/*Control-k*/ |
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282 | if (line[col]) { |
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283 | if (output) { |
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284 | int end = strlen(line); |
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285 | int bs; |
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286 | fprintf(out,"%*c", end - col, ' '); |
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287 | for (bs = 0; bs < (end - col); bs++) |
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288 | fputc('\b', out); |
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289 | } |
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290 | line[col] = '\0'; |
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291 | } |
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292 | break; |
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293 | |
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294 | case 0x04:/*Control-d*/ |
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295 | if (strlen(line)) |
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296 | break; |
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297 | case EOF: |
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298 | if (output) |
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299 | fputc('\n', out); |
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300 | return -2; |
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301 | |
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302 | case '\f': |
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303 | if (output) { |
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304 | int end; |
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305 | int bs; |
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306 | fputc('\f',out); |
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307 | fprintf(out,"\r%s%s", prompt, line); |
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308 | end = (int) strlen (line); |
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309 | for (bs = 0; bs < (end - col); bs++) |
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310 | fputc('\b', out); |
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311 | } |
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312 | break; |
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313 | |
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314 | case '\b': |
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315 | case '\x7f': |
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316 | if (col > 0) |
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317 | { |
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318 | int bs; |
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319 | col--; |
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320 | strcpy (line + col, line + col + 1); |
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321 | if (output) { |
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322 | fprintf(out,"\b%s \b", line + col); |
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323 | for (bs = 0; bs < ((int) strlen (line) - col); bs++) |
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324 | fputc('\b', out); |
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325 | } |
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326 | } |
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327 | break; |
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328 | |
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329 | case '\n': |
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330 | case '\r': |
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331 | { |
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332 | /* |
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333 | * Process the command. |
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334 | */ |
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335 | if (output) |
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336 | fprintf(out,"\n"); |
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337 | |
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338 | /* |
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339 | * Only process the command if we have a command and it is not |
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340 | * repeated in the history. |
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341 | */ |
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342 | if (strlen(line) == 0) { |
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343 | cmd = -1; |
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344 | } else { |
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345 | if ((cmd < 0) || (strcmp(line, cmds[cmd]) != 0)) { |
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346 | if (count > 1) |
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347 | memmove(cmds[1], cmds[0], (count - 1) * size); |
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348 | memmove (cmds[0], line, size); |
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349 | cmd = 0; |
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350 | } |
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351 | } |
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352 | } |
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353 | return cmd; |
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354 | |
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355 | default: |
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356 | if ((col < (size - 1)) && (c >= ' ') && (c <= '~')) { |
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357 | int end = strlen (line); |
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358 | if (inserting && (col < end) && (end < size)) { |
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359 | int ch, bs; |
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360 | for (ch = end + 1; ch > col; ch--) |
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361 | line[ch] = line[ch - 1]; |
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362 | if (output) { |
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363 | fprintf(out, "%s", line + col); |
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364 | for (bs = 0; bs < (end - col + 1); bs++) |
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365 | fputc('\b', out); |
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366 | } |
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367 | } |
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368 | line[col++] = c; |
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369 | if (col > end) |
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370 | line[col] = '\0'; |
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371 | if (output) |
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372 | fputc(c, out); |
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373 | } |
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374 | break; |
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375 | } |
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376 | } |
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377 | } |
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378 | return -2; |
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379 | } |
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380 | |
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381 | /* ----------------------------------------------- * |
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382 | * - The shell TASK |
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383 | * Poor but enough.. |
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384 | * TODO: Redirection. Tty Signals. ENVVARs. Shell language. |
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385 | * ----------------------------------------------- */ |
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386 | |
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387 | void rtems_shell_init_issue(void) |
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388 | { |
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389 | static bool issue_inited=false; |
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390 | struct stat buf; |
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391 | |
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392 | if (issue_inited) |
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393 | return; |
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394 | issue_inited = true; |
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395 | |
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396 | /* dummy call to init /etc dir */ |
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397 | getpwnam("root"); |
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398 | |
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399 | if (stat("/etc/issue",&buf)) { |
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400 | rtems_shell_write_file("/etc/issue", |
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401 | "\n" |
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402 | "Welcome to @V\\n" |
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403 | "Login into @S\\n"); |
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404 | } |
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405 | |
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406 | if (stat("/etc/issue.net",&buf)) { |
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407 | rtems_shell_write_file("/etc/issue.net", |
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408 | "\n" |
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409 | "Welcome to %v\n" |
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410 | "running on %m\n"); |
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411 | } |
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412 | } |
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413 | |
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414 | static bool rtems_shell_login(FILE * in,FILE * out) { |
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415 | FILE *fd; |
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416 | int c; |
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417 | time_t t; |
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418 | |
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419 | rtems_shell_init_issue(); |
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420 | setuid(0); |
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421 | setgid(0); |
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422 | rtems_current_user_env->euid = |
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423 | rtems_current_user_env->egid =0; |
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424 | |
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425 | if (out) { |
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426 | if ((rtems_current_shell_env->devname[5]!='p')|| |
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427 | (rtems_current_shell_env->devname[6]!='t')|| |
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428 | (rtems_current_shell_env->devname[7]!='y')) { |
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429 | fd = fopen("/etc/issue","r"); |
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430 | if (fd) { |
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431 | while ((c=fgetc(fd))!=EOF) { |
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432 | if (c=='@') { |
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433 | switch(c=fgetc(fd)) { |
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434 | case 'L': |
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435 | fprintf(out,"%s",rtems_current_shell_env->devname); |
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436 | break; |
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437 | case 'B': |
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438 | fprintf(out,"0"); |
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439 | break; |
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440 | case 'T': |
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441 | case 'D': |
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442 | time(&t); |
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443 | fprintf(out,"%s",ctime(&t)); |
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444 | break; |
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445 | case 'S': |
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446 | fprintf(out,"RTEMS"); |
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447 | break; |
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448 | case 'V': |
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449 | fprintf(out,"%s\n%s",_RTEMS_version, _Copyright_Notice); |
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450 | break; |
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451 | case '@': |
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452 | fprintf(out,"@"); |
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453 | break; |
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454 | default : |
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455 | fprintf(out,"@%c",c); |
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456 | break; |
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457 | } |
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458 | } else if (c=='\\') { |
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459 | switch(c=fgetc(fd)) { |
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460 | case '\\': fprintf(out,"\\"); break; |
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461 | case 'b': fprintf(out,"\b"); break; |
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462 | case 'f': fprintf(out,"\f"); break; |
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463 | case 'n': fprintf(out,"\n"); break; |
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464 | case 'r': fprintf(out,"\r"); break; |
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465 | case 's': fprintf(out," "); break; |
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466 | case 't': fprintf(out,"\t"); break; |
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467 | case '@': fprintf(out,"@"); break; |
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468 | } |
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469 | } else { |
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470 | fputc(c,out); |
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471 | } |
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472 | } |
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473 | fclose(fd); |
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474 | } |
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475 | } else { |
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476 | fd = fopen("/etc/issue.net","r"); |
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477 | if (fd) { |
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478 | while ((c=fgetc(fd))!=EOF) { |
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479 | if (c=='%') { |
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480 | switch(c=fgetc(fd)) { |
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481 | case 't': |
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482 | fprintf(out,"%s",rtems_current_shell_env->devname); |
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483 | break; |
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484 | case 'h': |
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485 | fprintf(out,"0"); |
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486 | break; |
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487 | case 'D': |
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488 | fprintf(out," "); |
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489 | break; |
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490 | case 'd': |
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491 | time(&t); |
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492 | fprintf(out,"%s",ctime(&t)); |
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493 | break; |
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494 | case 's': |
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495 | fprintf(out,"RTEMS"); |
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496 | break; |
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497 | case 'm': |
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498 | fprintf(out,"(" CPU_NAME "/" CPU_MODEL_NAME ")"); |
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499 | break; |
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500 | case 'r': |
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501 | fprintf(out,_RTEMS_version); |
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502 | break; |
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503 | case 'v': |
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504 | fprintf(out,"%s\n%s",_RTEMS_version,_Copyright_Notice); |
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505 | break; |
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506 | case '%':fprintf(out,"%%"); |
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507 | break; |
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508 | default: |
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509 | fprintf(out,"%%%c",c); |
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510 | break; |
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511 | } |
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512 | } else { |
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513 | fputc(c,out); |
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514 | } |
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515 | } |
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516 | fclose(fd); |
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517 | } |
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518 | } |
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519 | } |
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520 | |
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521 | return rtems_shell_login_prompt( |
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522 | in, |
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523 | out, |
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524 | rtems_current_shell_env->devname, |
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525 | rtems_current_shell_env->login_check |
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526 | ); |
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527 | } |
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528 | |
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529 | #if defined(SHELL_DEBUG) |
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530 | void rtems_shell_print_env( |
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531 | rtems_shell_env_t * shell_env |
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532 | ) |
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533 | { |
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534 | if ( !shell_env ) { |
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535 | printk( "shell_env is NULL\n" ); |
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536 | return; |
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537 | } |
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538 | printk( "shell_env=%p\n" |
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539 | "shell_env->magic=0x%08x\t" |
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540 | "shell_env->devname=%s\n" |
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541 | "shell_env->taskname=%s\t" |
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542 | "shell_env->exit_shell=%d\t" |
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543 | "shell_env->forever=%d\n", |
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544 | shell_env->magic, |
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545 | shell_env->devname, |
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546 | ((shell_env->taskname) ? shell_env->taskname : "NOT SET"), |
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547 | shell_env->exit_shell, |
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548 | shell_env->forever |
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549 | ); |
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550 | } |
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551 | #endif |
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552 | |
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553 | rtems_task rtems_shell_task(rtems_task_argument task_argument) |
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554 | { |
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555 | rtems_shell_env_t *shell_env = (rtems_shell_env_t*) task_argument; |
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556 | rtems_id wake_on_end = shell_env->wake_on_end; |
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557 | rtems_shell_main_loop( shell_env ); |
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558 | if (wake_on_end != RTEMS_INVALID_ID) |
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559 | rtems_event_send (wake_on_end, RTEMS_EVENT_1); |
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560 | rtems_task_delete( RTEMS_SELF ); |
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561 | } |
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562 | |
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563 | #define RTEMS_SHELL_MAXIMUM_ARGUMENTS (128) |
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564 | #define RTEMS_SHELL_CMD_SIZE (128) |
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565 | #define RTEMS_SHELL_CMD_COUNT (32) |
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566 | #define RTEMS_SHELL_PROMPT_SIZE (128) |
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567 | |
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568 | bool rtems_shell_main_loop( |
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569 | rtems_shell_env_t *shell_env_arg |
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570 | ) |
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571 | { |
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572 | rtems_shell_env_t *shell_env; |
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573 | rtems_shell_cmd_t *shell_cmd; |
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574 | rtems_status_code sc; |
---|
575 | struct termios term; |
---|
576 | struct termios previous_term; |
---|
577 | char *prompt = NULL; |
---|
578 | int cmd; |
---|
579 | int cmd_count = 1; /* assume a script and so only 1 command line */ |
---|
580 | char *cmds[RTEMS_SHELL_CMD_COUNT]; |
---|
581 | char *cmd_argv; |
---|
582 | int argc; |
---|
583 | char *argv[RTEMS_SHELL_MAXIMUM_ARGUMENTS]; |
---|
584 | bool result = true; |
---|
585 | bool input_file = false; |
---|
586 | int line = 0; |
---|
587 | FILE *stdinToClose = NULL; |
---|
588 | FILE *stdoutToClose = NULL; |
---|
589 | |
---|
590 | rtems_shell_initialize_command_set(); |
---|
591 | |
---|
592 | shell_env = |
---|
593 | rtems_current_shell_env = rtems_shell_init_env( shell_env_arg ); |
---|
594 | |
---|
595 | /* |
---|
596 | * @todo chrisj |
---|
597 | * Remove the use of task variables. Change to have a single |
---|
598 | * allocation per shell and then set into a notepad register |
---|
599 | * in the TCB. Provide a function to return the pointer. |
---|
600 | * Task variables are a virus to embedded systems software. |
---|
601 | */ |
---|
602 | sc = rtems_task_variable_add( |
---|
603 | RTEMS_SELF, |
---|
604 | (void*)&rtems_current_shell_env, |
---|
605 | rtems_shell_env_free |
---|
606 | ); |
---|
607 | if (sc != RTEMS_SUCCESSFUL) { |
---|
608 | rtems_error(sc,"rtems_task_variable_add(current_shell_env):"); |
---|
609 | return false; |
---|
610 | } |
---|
611 | |
---|
612 | setuid(0); |
---|
613 | setgid(0); |
---|
614 | |
---|
615 | rtems_current_user_env->euid = rtems_current_user_env->egid = 0; |
---|
616 | |
---|
617 | fileno(stdout); |
---|
618 | |
---|
619 | /* fprintf( stderr, |
---|
620 | "-%s-%s-\n", shell_env->input, shell_env->output ); |
---|
621 | */ |
---|
622 | |
---|
623 | if (shell_env->output && strcmp(shell_env->output, "stdout") != 0) { |
---|
624 | if (strcmp(shell_env->output, "stderr") == 0) { |
---|
625 | stdout = stderr; |
---|
626 | } else if (strcmp(shell_env->output, "/dev/null") == 0) { |
---|
627 | fclose (stdout); |
---|
628 | } else { |
---|
629 | FILE *output = fopen(shell_env_arg->output, |
---|
630 | shell_env_arg->output_append ? "a" : "w"); |
---|
631 | if (!output) { |
---|
632 | fprintf(stderr, "shell: open output %s failed: %s\n", |
---|
633 | shell_env_arg->output, strerror(errno)); |
---|
634 | return false; |
---|
635 | } |
---|
636 | stdout = output; |
---|
637 | stdoutToClose = output; |
---|
638 | } |
---|
639 | } |
---|
640 | |
---|
641 | if (shell_env->input && strcmp(shell_env_arg->input, "stdin") != 0) { |
---|
642 | FILE *input = fopen(shell_env_arg->input, "r"); |
---|
643 | if (!input) { |
---|
644 | fprintf(stderr, "shell: open input %s failed: %s\n", |
---|
645 | shell_env_arg->input, strerror(errno)); |
---|
646 | return false; |
---|
647 | } |
---|
648 | stdin = input; |
---|
649 | stdinToClose = input; |
---|
650 | shell_env->forever = false; |
---|
651 | input_file =true; |
---|
652 | } |
---|
653 | else { |
---|
654 | /* make a raw terminal,Linux Manuals */ |
---|
655 | if (tcgetattr(fileno(stdin), &previous_term) >= 0) { |
---|
656 | term = previous_term; |
---|
657 | term.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON); |
---|
658 | term.c_oflag &= ~OPOST; |
---|
659 | term.c_oflag |= (OPOST|ONLCR); /* But with cr+nl on output */ |
---|
660 | term.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); |
---|
661 | term.c_cflag |= CLOCAL | CREAD; |
---|
662 | term.c_cc[VMIN] = 1; |
---|
663 | term.c_cc[VTIME] = 0; |
---|
664 | if (tcsetattr (fileno(stdin), TCSADRAIN, &term) < 0) { |
---|
665 | fprintf(stderr, |
---|
666 | "shell:cannot set terminal attributes(%s)\n",shell_env->devname); |
---|
667 | } |
---|
668 | } |
---|
669 | cmd_count = RTEMS_SHELL_CMD_COUNT; |
---|
670 | prompt = malloc(RTEMS_SHELL_PROMPT_SIZE); |
---|
671 | if (!prompt) |
---|
672 | fprintf(stderr, |
---|
673 | "shell:cannot allocate prompt memory\n"); |
---|
674 | } |
---|
675 | |
---|
676 | setvbuf(stdin,NULL,_IONBF,0); /* Not buffered*/ |
---|
677 | setvbuf(stdout,NULL,_IONBF,0); /* Not buffered*/ |
---|
678 | |
---|
679 | rtems_shell_initialize_command_set(); |
---|
680 | |
---|
681 | /* |
---|
682 | * Allocate the command line buffers. |
---|
683 | */ |
---|
684 | cmd_argv = malloc (RTEMS_SHELL_CMD_SIZE); |
---|
685 | if (!cmd_argv) { |
---|
686 | fprintf(stderr, "no memory for command line buffers\n" ); |
---|
687 | } |
---|
688 | |
---|
689 | cmds[0] = calloc (cmd_count, RTEMS_SHELL_CMD_SIZE); |
---|
690 | if (!cmds[0]) { |
---|
691 | fprintf(stderr, "no memory for command line buffers\n" ); |
---|
692 | } |
---|
693 | |
---|
694 | if (cmd_argv && cmds[0]) { |
---|
695 | |
---|
696 | memset (cmds[0], 0, cmd_count * RTEMS_SHELL_CMD_SIZE); |
---|
697 | |
---|
698 | for (cmd = 1; cmd < cmd_count; cmd++) { |
---|
699 | cmds[cmd] = cmds[cmd - 1] + RTEMS_SHELL_CMD_SIZE; |
---|
700 | } |
---|
701 | |
---|
702 | do { |
---|
703 | /* Set again root user and root filesystem, side effect of set_priv..*/ |
---|
704 | sc = rtems_libio_set_private_env(); |
---|
705 | if (sc != RTEMS_SUCCESSFUL) { |
---|
706 | rtems_error(sc,"rtems_libio_set_private_env():"); |
---|
707 | result = false; |
---|
708 | break; |
---|
709 | } |
---|
710 | |
---|
711 | /* |
---|
712 | * By using result here, we can fall to the bottom of the |
---|
713 | * loop when the connection is dropped during login and |
---|
714 | * keep on trucking. |
---|
715 | */ |
---|
716 | if (shell_env->login_check != NULL) { |
---|
717 | result = rtems_shell_login(stdin,stdout); |
---|
718 | } else { |
---|
719 | result = true; |
---|
720 | } |
---|
721 | |
---|
722 | if (result) { |
---|
723 | const char *c; |
---|
724 | memset (cmds[0], 0, cmd_count * RTEMS_SHELL_CMD_SIZE); |
---|
725 | if (!input_file) { |
---|
726 | rtems_shell_cat_file(stdout,"/etc/motd"); |
---|
727 | fprintf(stdout, "\n" |
---|
728 | "RTEMS SHELL (Ver.1.0-FRC):%s. " \ |
---|
729 | __DATE__". 'help' to list commands.\n", |
---|
730 | shell_env->devname); |
---|
731 | } |
---|
732 | |
---|
733 | if (input_file) |
---|
734 | chdir(shell_env->cwd); |
---|
735 | else |
---|
736 | chdir("/"); /* XXX: chdir to getpwent homedir */ |
---|
737 | |
---|
738 | shell_env->exit_shell = false; |
---|
739 | |
---|
740 | for (;;) { |
---|
741 | int cmd; |
---|
742 | |
---|
743 | /* Prompt section */ |
---|
744 | if (prompt) { |
---|
745 | rtems_shell_get_prompt(shell_env, prompt, |
---|
746 | RTEMS_SHELL_PROMPT_SIZE); |
---|
747 | } |
---|
748 | |
---|
749 | /* getcmd section */ |
---|
750 | cmd = rtems_shell_line_editor(cmds, cmd_count, |
---|
751 | RTEMS_SHELL_CMD_SIZE, prompt, |
---|
752 | stdin, stdout); |
---|
753 | |
---|
754 | if (cmd == -1) |
---|
755 | continue; /* empty line */ |
---|
756 | |
---|
757 | if (cmd == -2) |
---|
758 | break; /*EOF*/ |
---|
759 | |
---|
760 | line++; |
---|
761 | |
---|
762 | if (shell_env->echo) |
---|
763 | fprintf(stdout, "%d: %s\n", line, cmds[cmd]); |
---|
764 | |
---|
765 | /* evaluate cmd section */ |
---|
766 | c = cmds[cmd]; |
---|
767 | while (*c) { |
---|
768 | if (!isblank((unsigned char)*c)) |
---|
769 | break; |
---|
770 | c++; |
---|
771 | } |
---|
772 | |
---|
773 | if (*c == '\0') /* empty line */ |
---|
774 | continue; |
---|
775 | |
---|
776 | if (*c == '#') { /* comment character */ |
---|
777 | cmds[cmd][0] = 0; |
---|
778 | continue; |
---|
779 | } |
---|
780 | |
---|
781 | if (!strcmp(cmds[cmd],"bye") || !strcmp(cmds[cmd],"exit")) { |
---|
782 | fprintf(stdout, "Shell exiting\n" ); |
---|
783 | break; |
---|
784 | } else if (!strcmp(cmds[cmd],"shutdown")) { /* exit application */ |
---|
785 | fprintf(stdout, "System shutting down at user request\n" ); |
---|
786 | exit(0); |
---|
787 | } |
---|
788 | |
---|
789 | /* exec cmd section */ |
---|
790 | /* TODO: |
---|
791 | * To avoid user crash catch the signals. |
---|
792 | * Open a new stdio files with posibility of redirection * |
---|
793 | * Run in a new shell task background. (unix &) |
---|
794 | * Resuming. A little bash. |
---|
795 | */ |
---|
796 | memcpy (cmd_argv, cmds[cmd], RTEMS_SHELL_CMD_SIZE); |
---|
797 | if (!rtems_shell_make_args(cmd_argv, &argc, argv, |
---|
798 | RTEMS_SHELL_MAXIMUM_ARGUMENTS)) { |
---|
799 | shell_cmd = rtems_shell_lookup_cmd(argv[0]); |
---|
800 | if ( argv[0] == NULL ) { |
---|
801 | shell_env->errorlevel = -1; |
---|
802 | } else if ( shell_cmd == NULL ) { |
---|
803 | shell_env->errorlevel = rtems_shell_script_file(argc, argv); |
---|
804 | } else { |
---|
805 | shell_env->errorlevel = shell_cmd->command(argc, argv); |
---|
806 | } |
---|
807 | } |
---|
808 | |
---|
809 | /* end exec cmd section */ |
---|
810 | if (shell_env->exit_shell) |
---|
811 | break; |
---|
812 | } |
---|
813 | |
---|
814 | fflush( stdout ); |
---|
815 | fflush( stderr ); |
---|
816 | } |
---|
817 | } while (result && shell_env->forever); |
---|
818 | |
---|
819 | } |
---|
820 | |
---|
821 | if (cmds[0]) |
---|
822 | free (cmds[0]); |
---|
823 | if (cmd_argv) |
---|
824 | free (cmd_argv); |
---|
825 | if (prompt) |
---|
826 | free (prompt); |
---|
827 | |
---|
828 | if (stdinToClose) { |
---|
829 | fclose( stdinToClose ); |
---|
830 | } else { |
---|
831 | if (tcsetattr(fileno(stdin), TCSADRAIN, &previous_term) < 0) { |
---|
832 | fprintf( |
---|
833 | stderr, |
---|
834 | "shell: cannot reset terminal attributes (%s)\n", |
---|
835 | shell_env->devname |
---|
836 | ); |
---|
837 | } |
---|
838 | } |
---|
839 | if ( stdoutToClose ) |
---|
840 | fclose( stdoutToClose ); |
---|
841 | return result; |
---|
842 | } |
---|
843 | |
---|
844 | /* ----------------------------------------------- */ |
---|
845 | static rtems_status_code rtems_shell_run ( |
---|
846 | const char *task_name, |
---|
847 | size_t task_stacksize, |
---|
848 | rtems_task_priority task_priority, |
---|
849 | const char *devname, |
---|
850 | bool forever, |
---|
851 | bool wait, |
---|
852 | const char *input, |
---|
853 | const char *output, |
---|
854 | bool output_append, |
---|
855 | rtems_id wake_on_end, |
---|
856 | bool echo, |
---|
857 | rtems_shell_login_check_t login_check |
---|
858 | ) |
---|
859 | { |
---|
860 | rtems_id task_id; |
---|
861 | rtems_status_code sc; |
---|
862 | rtems_shell_env_t *shell_env; |
---|
863 | rtems_name name; |
---|
864 | |
---|
865 | if ( task_name && strlen(task_name) >= 4) |
---|
866 | name = rtems_build_name( |
---|
867 | task_name[0], task_name[1], task_name[2], task_name[3]); |
---|
868 | else |
---|
869 | name = rtems_build_name( 'S', 'E', 'N', 'V' ); |
---|
870 | |
---|
871 | sc = rtems_task_create( |
---|
872 | name, |
---|
873 | task_priority, |
---|
874 | task_stacksize, |
---|
875 | RTEMS_PREEMPT | RTEMS_TIMESLICE | RTEMS_NO_ASR, |
---|
876 | RTEMS_LOCAL | RTEMS_FLOATING_POINT, |
---|
877 | &task_id |
---|
878 | ); |
---|
879 | if (sc != RTEMS_SUCCESSFUL) { |
---|
880 | rtems_error(sc,"creating task %s in shell_init()",task_name); |
---|
881 | return sc; |
---|
882 | } |
---|
883 | |
---|
884 | shell_env = rtems_shell_init_env( NULL ); |
---|
885 | if ( !shell_env ) { |
---|
886 | rtems_error(RTEMS_NO_MEMORY, |
---|
887 | "allocating shell_env %s in shell_init()",task_name); |
---|
888 | return RTEMS_NO_MEMORY; |
---|
889 | } |
---|
890 | shell_env->devname = devname; |
---|
891 | shell_env->taskname = task_name; |
---|
892 | shell_env->exit_shell = false; |
---|
893 | shell_env->forever = forever; |
---|
894 | shell_env->echo = echo; |
---|
895 | shell_env->input = strdup (input); |
---|
896 | shell_env->output = strdup (output); |
---|
897 | shell_env->output_append = output_append; |
---|
898 | shell_env->wake_on_end = wake_on_end; |
---|
899 | shell_env->login_check = login_check; |
---|
900 | |
---|
901 | getcwd(shell_env->cwd, sizeof(shell_env->cwd)); |
---|
902 | |
---|
903 | sc = rtems_task_start(task_id, rtems_shell_task, |
---|
904 | (rtems_task_argument) shell_env); |
---|
905 | if (sc != RTEMS_SUCCESSFUL) { |
---|
906 | rtems_error(sc,"starting task %s in shell_init()",task_name); |
---|
907 | return sc; |
---|
908 | } |
---|
909 | |
---|
910 | if (wait) { |
---|
911 | rtems_event_set out; |
---|
912 | sc = rtems_event_receive (RTEMS_EVENT_1, RTEMS_WAIT, 0, &out); |
---|
913 | } |
---|
914 | |
---|
915 | return 0; |
---|
916 | } |
---|
917 | |
---|
918 | rtems_status_code rtems_shell_init( |
---|
919 | const char *task_name, |
---|
920 | size_t task_stacksize, |
---|
921 | rtems_task_priority task_priority, |
---|
922 | const char *devname, |
---|
923 | bool forever, |
---|
924 | bool wait, |
---|
925 | rtems_shell_login_check_t login_check |
---|
926 | ) |
---|
927 | { |
---|
928 | rtems_id to_wake = RTEMS_ID_NONE; |
---|
929 | |
---|
930 | if ( wait ) |
---|
931 | to_wake = rtems_task_self(); |
---|
932 | |
---|
933 | return rtems_shell_run( |
---|
934 | task_name, /* task_name */ |
---|
935 | task_stacksize, /* task_stacksize */ |
---|
936 | task_priority, /* task_priority */ |
---|
937 | devname, /* devname */ |
---|
938 | forever, /* forever */ |
---|
939 | wait, /* wait */ |
---|
940 | "stdin", /* input */ |
---|
941 | "stdout", /* output */ |
---|
942 | false, /* output_append */ |
---|
943 | to_wake, /* wake_on_end */ |
---|
944 | false, /* echo */ |
---|
945 | login_check /* login check */ |
---|
946 | ); |
---|
947 | } |
---|
948 | |
---|
949 | rtems_status_code rtems_shell_script ( |
---|
950 | const char *task_name, |
---|
951 | size_t task_stacksize, |
---|
952 | rtems_task_priority task_priority, |
---|
953 | const char* input, |
---|
954 | const char* output, |
---|
955 | bool output_append, |
---|
956 | bool wait, |
---|
957 | bool echo |
---|
958 | ) |
---|
959 | { |
---|
960 | rtems_id current_task = RTEMS_INVALID_ID; |
---|
961 | rtems_status_code sc; |
---|
962 | |
---|
963 | if (wait) { |
---|
964 | sc = rtems_task_ident (RTEMS_SELF, RTEMS_LOCAL, ¤t_task); |
---|
965 | if (sc != RTEMS_SUCCESSFUL) |
---|
966 | return sc; |
---|
967 | } |
---|
968 | |
---|
969 | sc = rtems_shell_run( |
---|
970 | task_name, /* task_name */ |
---|
971 | task_stacksize, /* task_stacksize */ |
---|
972 | task_priority, /* task_priority */ |
---|
973 | NULL, /* devname */ |
---|
974 | 0, /* forever */ |
---|
975 | wait, /* wait */ |
---|
976 | input, /* input */ |
---|
977 | output, /* output */ |
---|
978 | output_append, /* output_append */ |
---|
979 | current_task, /* wake_on_end */ |
---|
980 | echo, /* echo */ |
---|
981 | NULL /* login check */ |
---|
982 | ); |
---|
983 | if (sc != RTEMS_SUCCESSFUL) |
---|
984 | return sc; |
---|
985 | |
---|
986 | return sc; |
---|
987 | } |
---|