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.org/license/LICENSE. |
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13 | */ |
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14 | |
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15 | #ifdef HAVE_CONFIG_H |
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16 | #include "config.h" |
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17 | #endif |
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18 | |
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19 | #include <stdio.h> |
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20 | #include <time.h> |
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21 | |
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22 | #include <rtems.h> |
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23 | #include <rtems/libio.h> |
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24 | #include <rtems/libio_.h> |
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25 | #include <rtems/shell.h> |
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26 | #include <rtems/shellconfig.h> |
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27 | #include <rtems/console.h> |
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28 | #include "internal.h" |
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29 | |
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30 | #include <termios.h> |
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31 | #include <string.h> |
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32 | #include <stdlib.h> |
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33 | #include <ctype.h> |
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34 | #include <sys/stat.h> |
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35 | #include <unistd.h> |
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36 | #include <errno.h> |
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37 | #include <pwd.h> |
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38 | #include <pthread.h> |
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39 | #include <assert.h> |
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40 | |
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41 | const rtems_shell_env_t rtems_global_shell_env = { |
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42 | .magic = rtems_build_name('S', 'E', 'N', 'V'), |
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43 | .devname = CONSOLE_DEVICE_NAME, |
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44 | .taskname = "SHGL", |
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45 | .exit_shell = false, |
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46 | .forever = true, |
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47 | .errorlevel = -1, |
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48 | .echo = false, |
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49 | .cwd = "/", |
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50 | .input = NULL, |
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51 | .output = NULL, |
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52 | .output_append = false, |
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53 | .wake_on_end = RTEMS_ID_NONE, |
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54 | .login_check = NULL |
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55 | }; |
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56 | |
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57 | static pthread_once_t rtems_shell_once = PTHREAD_ONCE_INIT; |
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58 | |
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59 | static pthread_key_t rtems_shell_current_env_key; |
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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 | static 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 | shell_env->taskname = NULL; |
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76 | } else { |
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77 | *shell_env = *shell_env_p; |
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78 | } |
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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 | static 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 | static void rtems_shell_create_file(const char *name, const char *content) |
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104 | { |
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105 | FILE *fp = fopen(name, "wx"); |
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106 | |
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107 | if (fp != NULL) { |
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108 | fputs(content, fp); |
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109 | fclose(fp); |
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110 | } |
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111 | } |
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112 | |
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113 | static void rtems_shell_init_commands(void) |
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114 | { |
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115 | rtems_shell_cmd_t * const *c; |
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116 | rtems_shell_alias_t * const *a; |
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117 | |
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118 | for ( c = rtems_shell_Initial_commands ; *c ; c++ ) { |
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119 | rtems_shell_add_cmd_struct( *c ); |
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120 | } |
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121 | |
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122 | for ( a = rtems_shell_Initial_aliases ; *a ; a++ ) { |
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123 | rtems_shell_alias_cmd( (*a)->name, (*a)->alias ); |
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124 | } |
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125 | } |
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126 | |
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127 | static void rtems_shell_init_once(void) |
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128 | { |
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129 | struct passwd pwd; |
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130 | struct passwd *pwd_res; |
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131 | |
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132 | pthread_key_create(&rtems_shell_current_env_key, rtems_shell_env_free); |
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133 | |
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134 | /* dummy call to init /etc dir */ |
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135 | getpwuid_r(0, &pwd, NULL, 0, &pwd_res); |
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136 | |
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137 | rtems_shell_create_file("etc/issue", |
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138 | "\n" |
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139 | "Welcome to @V\\n" |
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140 | "Login into @S\\n"); |
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141 | |
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142 | rtems_shell_create_file("/etc/issue.net", |
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143 | "\n" |
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144 | "Welcome to %v\n" |
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145 | "running on %m\n"); |
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146 | |
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147 | rtems_shell_init_commands(); |
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148 | rtems_shell_register_monitor_commands(); |
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149 | } |
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150 | |
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151 | void rtems_shell_init_environment(void) |
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152 | { |
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153 | assert(pthread_once(&rtems_shell_once, rtems_shell_init_once) == 0); |
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154 | } |
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155 | |
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156 | /* |
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157 | * Return the current shell environment |
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158 | */ |
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159 | rtems_shell_env_t *rtems_shell_get_current_env(void) |
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160 | { |
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161 | return (rtems_shell_env_t *) pthread_getspecific(rtems_shell_current_env_key); |
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162 | } |
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163 | |
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164 | /* |
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165 | * Duplication the current shell environment and if none is set |
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166 | * clear it. |
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167 | */ |
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168 | void rtems_shell_dup_current_env(rtems_shell_env_t *copy) |
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169 | { |
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170 | rtems_shell_env_t *env = rtems_shell_get_current_env(); |
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171 | if (env) { |
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172 | *copy = *env; |
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173 | } |
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174 | else { |
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175 | memset(copy, 0, sizeof(rtems_shell_env_t)); |
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176 | copy->magic = rtems_build_name('S', 'E', 'N', 'V'); |
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177 | copy->devname = CONSOLE_DEVICE_NAME; |
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178 | copy->taskname = "RTSH"; |
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179 | } |
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180 | } |
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181 | |
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182 | /* |
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183 | * Get a line of user input with modest features |
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184 | */ |
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185 | static int rtems_shell_line_editor( |
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186 | char *cmds[], |
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187 | int count, |
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188 | int size, |
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189 | const char *prompt, |
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190 | FILE *in, |
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191 | FILE *out |
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192 | ) |
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193 | { |
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194 | unsigned int extended_key; |
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195 | int c; |
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196 | int col; |
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197 | int last_col; |
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198 | int output; |
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199 | char line[size]; |
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200 | char new_line[size]; |
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201 | int up; |
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202 | int cmd = -1; |
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203 | int inserting = 1; |
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204 | |
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205 | output = (out && isatty(fileno(in))); |
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206 | |
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207 | col = last_col = 0; |
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208 | |
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209 | tcdrain(fileno(in)); |
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210 | if (out) |
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211 | tcdrain(fileno(out)); |
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212 | |
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213 | if (output && prompt) |
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214 | fprintf(out, "\r%s", prompt); |
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215 | |
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216 | line[0] = 0; |
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217 | new_line[0] = 0; |
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218 | |
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219 | for (;;) { |
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220 | |
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221 | if (output) |
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222 | fflush(out); |
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223 | |
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224 | extended_key = rtems_shell_getchar(in); |
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225 | |
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226 | if (extended_key == EOF) |
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227 | return -2; |
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228 | |
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229 | c = extended_key & RTEMS_SHELL_KEYS_NORMAL_MASK; |
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230 | |
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231 | /* |
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232 | * Make the extended_key usable as a boolean. |
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233 | */ |
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234 | extended_key &= ~RTEMS_SHELL_KEYS_NORMAL_MASK; |
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235 | |
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236 | up = 0; |
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237 | |
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238 | if (extended_key) |
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239 | { |
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240 | switch (c) |
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241 | { |
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242 | case RTEMS_SHELL_KEYS_END: |
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243 | if (output) |
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244 | fprintf(out, "%s", line + col); |
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245 | col = (int) strlen (line); |
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246 | break; |
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247 | |
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248 | case RTEMS_SHELL_KEYS_HOME: |
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249 | if (output) { |
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250 | if (prompt) |
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251 | fprintf(out,"\r%s", prompt); |
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252 | } |
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253 | col = 0; |
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254 | break; |
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255 | |
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256 | case RTEMS_SHELL_KEYS_LARROW: |
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257 | c = 2; |
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258 | extended_key = 0; |
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259 | break; |
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260 | |
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261 | case RTEMS_SHELL_KEYS_RARROW: |
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262 | c = 6; |
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263 | extended_key = 0; |
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264 | break; |
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265 | |
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266 | case RTEMS_SHELL_KEYS_UARROW: |
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267 | c = 16; |
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268 | extended_key = 0; |
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269 | break; |
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270 | |
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271 | case RTEMS_SHELL_KEYS_DARROW: |
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272 | c = 14; |
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273 | extended_key = 0; |
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274 | break; |
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275 | |
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276 | case RTEMS_SHELL_KEYS_DEL: |
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277 | if (line[col] != '\0') |
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278 | { |
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279 | int end; |
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280 | int bs; |
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281 | strcpy (&line[col], &line[col + 1]); |
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282 | if (output) { |
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283 | fprintf(out,"\r%s%s ", prompt, line); |
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284 | end = (int) strlen (line); |
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285 | for (bs = 0; bs < ((end - col) + 1); bs++) |
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286 | fputc('\b', out); |
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287 | } |
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288 | } |
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289 | break; |
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290 | |
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291 | case RTEMS_SHELL_KEYS_INS: |
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292 | inserting = inserting ? 0 : 1; |
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293 | break; |
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294 | } |
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295 | } |
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296 | if (!extended_key) |
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297 | { |
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298 | switch (c) |
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299 | { |
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300 | case 1: /*Control-a*/ |
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301 | if (output) { |
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302 | if (prompt) |
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303 | fprintf(out,"\r%s", prompt); |
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304 | } |
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305 | col = 0; |
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306 | break; |
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307 | |
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308 | case 2: /* Control-B */ |
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309 | if (col > 0) |
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310 | { |
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311 | col--; |
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312 | if (output) |
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313 | fputc('\b', out); |
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314 | } |
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315 | break; |
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316 | |
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317 | case 4: /* Control-D */ |
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318 | if (strlen(line)) { |
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319 | if (col < strlen(line)) { |
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320 | strcpy (line + col, line + col + 1); |
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321 | if (output) { |
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322 | int bs; |
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323 | fprintf(out,"%s \b", line + col); |
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324 | for (bs = 0; bs < ((int) strlen (line) - col); bs++) |
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325 | fputc('\b', out); |
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326 | } |
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327 | } |
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328 | break; |
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329 | } |
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330 | /* Fall through */ |
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331 | |
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332 | case EOF: |
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333 | if (output) |
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334 | fputc('\n', out); |
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335 | return -2; |
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336 | |
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337 | case 5: /*Control-e*/ |
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338 | if (output) |
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339 | fprintf(out, "%s", line + col); |
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340 | col = (int) strlen (line); |
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341 | break; |
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342 | |
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343 | case 6: /* Control-F */ |
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344 | if ((col < size) && (line[col] != '\0')) { |
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345 | if (output) |
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346 | fputc(line[col], out); |
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347 | col++; |
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348 | } |
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349 | break; |
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350 | |
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351 | case 7: /* Control-G */ |
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352 | if (output) { |
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353 | /* |
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354 | * The (int) cast is needed because the width specifier (%*) |
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355 | * must be an int, but strlen() returns a size_t. Without |
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356 | * the case, the result is a printf() format warning. |
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357 | */ |
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358 | fprintf(out,"\r%s%*c", prompt, (int) strlen (line), ' '); |
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359 | fprintf(out,"\r%s\x7", prompt); |
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360 | } |
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361 | memset (line, '\0', strlen(line)); |
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362 | col = 0; |
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363 | break; |
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364 | |
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365 | case 11: /*Control-k*/ |
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366 | if (line[col]) { |
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367 | if (output) { |
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368 | int end = strlen(line); |
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369 | int bs; |
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370 | fprintf(out,"%*c", end - col, ' '); |
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371 | for (bs = 0; bs < (end - col); bs++) |
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372 | fputc('\b', out); |
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373 | } |
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374 | line[col] = '\0'; |
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375 | } |
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376 | break; |
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377 | |
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378 | case '\f': |
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379 | if (output) { |
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380 | int end; |
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381 | int bs; |
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382 | fputc('\f',out); |
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383 | fprintf(out,"\r%s%s", prompt, line); |
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384 | end = (int) strlen (line); |
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385 | for (bs = 0; bs < (end - col); bs++) |
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386 | fputc('\b', out); |
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387 | } |
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388 | break; |
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389 | |
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390 | case '\b': |
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391 | case '\x7f': |
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392 | if (col > 0) |
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393 | { |
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394 | int bs; |
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395 | col--; |
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396 | strcpy (line + col, line + col + 1); |
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397 | if (output) { |
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398 | fprintf(out,"\b%s \b", line + col); |
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399 | for (bs = 0; bs < ((int) strlen (line) - col); bs++) |
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400 | fputc('\b', out); |
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401 | } |
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402 | } |
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403 | break; |
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404 | |
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405 | case '\n': |
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406 | case '\r': |
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407 | { |
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408 | /* |
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409 | * Process the command. |
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410 | */ |
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411 | if (output) |
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412 | fprintf(out,"\n"); |
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413 | |
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414 | /* |
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415 | * Only process the command if we have a command and it is not |
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416 | * repeated in the history. |
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417 | */ |
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418 | if (strlen(line) == 0) { |
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419 | cmd = -1; |
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420 | } else { |
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421 | if ((cmd < 0) || (strcmp(line, cmds[cmd]) != 0)) { |
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422 | if (count > 1) |
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423 | memmove(cmds[1], cmds[0], (count - 1) * size); |
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424 | memmove (cmds[0], line, size); |
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425 | cmd = 0; |
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426 | } else { |
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427 | if ((cmd > 1) && (strcmp(line, cmds[cmd]) == 0)) { |
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428 | memmove(cmds[1], cmds[0], cmd * size); |
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429 | memmove (cmds[0], line, size); |
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430 | cmd = 0; |
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431 | } |
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432 | } |
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433 | } |
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434 | } |
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435 | return cmd; |
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436 | |
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437 | case 16: /* Control-P */ |
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438 | if ((cmd >= (count - 1)) || (strlen(cmds[cmd + 1]) == 0)) { |
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439 | if (output) |
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440 | fputc('\x7', out); |
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441 | break; |
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442 | } |
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443 | |
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444 | up = 1; |
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445 | /* drop through */ |
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446 | |
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447 | case 14: /* Control-N */ |
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448 | { |
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449 | int last_cmd = cmd; |
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450 | int clen = strlen (line); |
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451 | |
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452 | if (prompt) |
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453 | clen += strlen(prompt); |
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454 | |
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455 | if (up) { |
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456 | cmd++; |
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457 | } else { |
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458 | if (cmd < 0) { |
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459 | if (output) |
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460 | fprintf(out, "\x7"); |
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461 | break; |
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462 | } |
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463 | else |
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464 | cmd--; |
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465 | } |
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466 | |
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467 | if ((last_cmd < 0) || (strcmp(cmds[last_cmd], line) != 0)) |
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468 | memcpy (new_line, line, size); |
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469 | |
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470 | if (cmd < 0) |
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471 | memcpy (line, new_line, size); |
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472 | else |
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473 | memcpy (line, cmds[cmd], size); |
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474 | |
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475 | col = strlen (line); |
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476 | |
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477 | if (output) { |
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478 | fprintf(out,"\r%s%*c", prompt, clen, ' '); |
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479 | fprintf(out,"\r%s%s", prompt, line); |
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480 | } |
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481 | } |
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482 | break; |
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483 | |
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484 | case 20: /* Control-T */ |
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485 | if (col > 0) |
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486 | { |
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487 | char tmp; |
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488 | if (col == strlen(line)) { |
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489 | col--; |
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490 | if (output) |
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491 | fprintf(out,"\b"); |
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492 | } |
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493 | tmp = line[col]; |
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494 | line[col] = line[col - 1]; |
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495 | line[col - 1] = tmp; |
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496 | if (output) |
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497 | fprintf(out,"\b%c%c", line[col - 1], line[col]); |
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498 | col++; |
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499 | } else { |
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500 | if (output) |
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501 | fputc('\x7', out); |
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502 | } |
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503 | break; |
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504 | |
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505 | case 21: /* Control-U */ |
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506 | if (col > 0) |
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507 | { |
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508 | int clen = strlen (line); |
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509 | |
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510 | strcpy (line, line + col); |
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511 | if (output) { |
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512 | fprintf(out,"\r%s%*c", prompt, clen, ' '); |
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513 | fprintf(out,"\r%s%s", prompt, line); |
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514 | } |
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515 | col = 0; |
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516 | } |
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517 | break; |
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518 | |
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519 | default: |
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520 | if ((col < (size - 1)) && (c >= ' ') && (c <= '~')) { |
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521 | int end = strlen (line); |
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522 | if (inserting && (col < end) && (end < size)) { |
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523 | int ch, bs; |
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524 | for (ch = end + 1; ch > col; ch--) |
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525 | line[ch] = line[ch - 1]; |
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526 | if (output) { |
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527 | fprintf(out, "%s", line + col); |
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528 | for (bs = 0; bs < (end - col + 1); bs++) |
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529 | fputc('\b', out); |
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530 | } |
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531 | } |
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532 | line[col++] = c; |
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533 | if (col > end) |
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534 | line[col] = '\0'; |
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535 | if (output) |
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536 | fputc(c, out); |
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537 | } |
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538 | break; |
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539 | } |
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540 | } |
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541 | } |
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542 | return -2; |
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543 | } |
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544 | |
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545 | static bool rtems_shell_login(rtems_shell_env_t *env, FILE * in,FILE * out) |
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546 | { |
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547 | FILE *fd; |
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548 | int c; |
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549 | time_t t; |
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550 | |
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551 | if (out) { |
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552 | if ((env->devname[5]!='p')|| |
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553 | (env->devname[6]!='t')|| |
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554 | (env->devname[7]!='y')) { |
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555 | fd = fopen("/etc/issue","r"); |
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556 | if (fd) { |
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557 | while ((c=fgetc(fd))!=EOF) { |
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558 | if (c=='@') { |
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559 | switch(c=fgetc(fd)) { |
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560 | case 'L': |
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561 | fprintf(out,"%s", env->devname); |
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562 | break; |
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563 | case 'B': |
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564 | fprintf(out,"0"); |
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565 | break; |
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566 | case 'T': |
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567 | case 'D': |
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568 | time(&t); |
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569 | fprintf(out,"%s",ctime(&t)); |
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570 | break; |
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571 | case 'S': |
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572 | fprintf(out,"RTEMS"); |
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573 | break; |
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574 | case 'V': |
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575 | fprintf(out,"%s\n%s",_RTEMS_version, _Copyright_Notice); |
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576 | break; |
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577 | case '@': |
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578 | fprintf(out,"@"); |
---|
579 | break; |
---|
580 | default : |
---|
581 | fprintf(out,"@%c",c); |
---|
582 | break; |
---|
583 | } |
---|
584 | } else if (c=='\\') { |
---|
585 | switch(c=fgetc(fd)) { |
---|
586 | case '\\': fprintf(out,"\\"); break; |
---|
587 | case 'b': fprintf(out,"\b"); break; |
---|
588 | case 'f': fprintf(out,"\f"); break; |
---|
589 | case 'n': fprintf(out,"\n"); break; |
---|
590 | case 'r': fprintf(out,"\r"); break; |
---|
591 | case 's': fprintf(out," "); break; |
---|
592 | case 't': fprintf(out,"\t"); break; |
---|
593 | case '@': fprintf(out,"@"); break; |
---|
594 | } |
---|
595 | } else { |
---|
596 | fputc(c,out); |
---|
597 | } |
---|
598 | } |
---|
599 | fclose(fd); |
---|
600 | } |
---|
601 | } else { |
---|
602 | fd = fopen("/etc/issue.net","r"); |
---|
603 | if (fd) { |
---|
604 | while ((c=fgetc(fd))!=EOF) { |
---|
605 | if (c=='%') { |
---|
606 | switch(c=fgetc(fd)) { |
---|
607 | case 't': |
---|
608 | fprintf(out,"%s", env->devname); |
---|
609 | break; |
---|
610 | case 'h': |
---|
611 | fprintf(out,"0"); |
---|
612 | break; |
---|
613 | case 'D': |
---|
614 | fprintf(out," "); |
---|
615 | break; |
---|
616 | case 'd': |
---|
617 | time(&t); |
---|
618 | fprintf(out,"%s",ctime(&t)); |
---|
619 | break; |
---|
620 | case 's': |
---|
621 | fprintf(out,"RTEMS"); |
---|
622 | break; |
---|
623 | case 'm': |
---|
624 | fprintf(out,"(" CPU_NAME "/" CPU_MODEL_NAME ")"); |
---|
625 | break; |
---|
626 | case 'r': |
---|
627 | fprintf(out,_RTEMS_version); |
---|
628 | break; |
---|
629 | case 'v': |
---|
630 | fprintf(out,"%s\n%s",_RTEMS_version,_Copyright_Notice); |
---|
631 | break; |
---|
632 | case '%':fprintf(out,"%%"); |
---|
633 | break; |
---|
634 | default: |
---|
635 | fprintf(out,"%%%c",c); |
---|
636 | break; |
---|
637 | } |
---|
638 | } else { |
---|
639 | fputc(c,out); |
---|
640 | } |
---|
641 | } |
---|
642 | fclose(fd); |
---|
643 | } |
---|
644 | } |
---|
645 | } |
---|
646 | |
---|
647 | return rtems_shell_login_prompt(in, out, env->devname, env->login_check); |
---|
648 | } |
---|
649 | |
---|
650 | #if defined(SHELL_DEBUG) |
---|
651 | void rtems_shell_print_env( |
---|
652 | rtems_shell_env_t * shell_env |
---|
653 | ) |
---|
654 | { |
---|
655 | if ( !shell_env ) { |
---|
656 | printk( "shell_env is NULL\n" ); |
---|
657 | return; |
---|
658 | } |
---|
659 | printk( "shell_env=%p\n" |
---|
660 | "shell_env->magic=0x%08x\t" |
---|
661 | "shell_env->devname=%s\n" |
---|
662 | "shell_env->taskname=%s\t" |
---|
663 | "shell_env->exit_shell=%d\t" |
---|
664 | "shell_env->forever=%d\n", |
---|
665 | shell_env->magic, |
---|
666 | shell_env->devname, |
---|
667 | ((shell_env->taskname) ? shell_env->taskname : "NOT SET"), |
---|
668 | shell_env->exit_shell, |
---|
669 | shell_env->forever |
---|
670 | ); |
---|
671 | } |
---|
672 | #endif |
---|
673 | |
---|
674 | static rtems_task rtems_shell_task(rtems_task_argument task_argument) |
---|
675 | { |
---|
676 | rtems_shell_env_t *shell_env = (rtems_shell_env_t*) task_argument; |
---|
677 | rtems_id wake_on_end = shell_env->wake_on_end; |
---|
678 | rtems_shell_main_loop( shell_env ); |
---|
679 | if (wake_on_end != RTEMS_INVALID_ID) |
---|
680 | rtems_event_send (wake_on_end, RTEMS_EVENT_1); |
---|
681 | rtems_task_exit(); |
---|
682 | } |
---|
683 | |
---|
684 | static bool rtems_shell_init_user_env(void) |
---|
685 | { |
---|
686 | rtems_status_code sc; |
---|
687 | |
---|
688 | /* Make sure we have a private user environment */ |
---|
689 | sc = rtems_libio_set_private_env(); |
---|
690 | if (sc != RTEMS_SUCCESSFUL) { |
---|
691 | return false; |
---|
692 | } |
---|
693 | |
---|
694 | /* Make an effective root user */ |
---|
695 | seteuid(0); |
---|
696 | setegid(0); |
---|
697 | |
---|
698 | return chroot("/") == 0; |
---|
699 | } |
---|
700 | |
---|
701 | #define RTEMS_SHELL_MAXIMUM_ARGUMENTS (128) |
---|
702 | #define RTEMS_SHELL_CMD_SIZE (128) |
---|
703 | #define RTEMS_SHELL_CMD_COUNT (32) |
---|
704 | #define RTEMS_SHELL_PROMPT_SIZE (128) |
---|
705 | |
---|
706 | bool rtems_shell_main_loop( |
---|
707 | rtems_shell_env_t *shell_env_arg |
---|
708 | ) |
---|
709 | { |
---|
710 | rtems_shell_env_t *shell_env; |
---|
711 | int eno; |
---|
712 | struct termios term; |
---|
713 | struct termios previous_term; |
---|
714 | char *prompt = NULL; |
---|
715 | int cmd; |
---|
716 | int cmd_count = 1; /* assume a script and so only 1 command line */ |
---|
717 | char *cmds[RTEMS_SHELL_CMD_COUNT]; |
---|
718 | char *cmd_argv; |
---|
719 | int argc; |
---|
720 | char *argv[RTEMS_SHELL_MAXIMUM_ARGUMENTS]; |
---|
721 | bool result = true; |
---|
722 | bool input_file = false; |
---|
723 | int line = 0; |
---|
724 | FILE *stdinToClose = NULL; |
---|
725 | FILE *stdoutToClose = NULL; |
---|
726 | |
---|
727 | rtems_shell_init_environment(); |
---|
728 | |
---|
729 | shell_env = rtems_shell_init_env(shell_env_arg); |
---|
730 | if (shell_env == NULL) { |
---|
731 | return false; |
---|
732 | } |
---|
733 | |
---|
734 | eno = pthread_setspecific(rtems_shell_current_env_key, shell_env); |
---|
735 | if (eno != 0) { |
---|
736 | return false; |
---|
737 | } |
---|
738 | |
---|
739 | if (!rtems_shell_init_user_env()) { |
---|
740 | return false; |
---|
741 | } |
---|
742 | |
---|
743 | fileno(stdout); |
---|
744 | |
---|
745 | /* fprintf( stderr, |
---|
746 | "-%s-%s-\n", shell_env->input, shell_env->output ); |
---|
747 | */ |
---|
748 | |
---|
749 | if (shell_env->output && strcmp(shell_env->output, "stdout") != 0) { |
---|
750 | if (strcmp(shell_env->output, "stderr") == 0) { |
---|
751 | stdout = stderr; |
---|
752 | } else if (strcmp(shell_env->output, "/dev/null") == 0) { |
---|
753 | fclose (stdout); |
---|
754 | } else { |
---|
755 | FILE *output = fopen(shell_env_arg->output, |
---|
756 | shell_env_arg->output_append ? "a" : "w"); |
---|
757 | if (!output) { |
---|
758 | fprintf(stderr, "shell: open output %s failed: %s\n", |
---|
759 | shell_env_arg->output, strerror(errno)); |
---|
760 | return false; |
---|
761 | } |
---|
762 | stdout = output; |
---|
763 | stdoutToClose = output; |
---|
764 | } |
---|
765 | } |
---|
766 | |
---|
767 | if (shell_env->input && strcmp(shell_env_arg->input, "stdin") != 0) { |
---|
768 | FILE *input = fopen(shell_env_arg->input, "r"); |
---|
769 | if (!input) { |
---|
770 | fprintf(stderr, "shell: open input %s failed: %s\n", |
---|
771 | shell_env_arg->input, strerror(errno)); |
---|
772 | return false; |
---|
773 | } |
---|
774 | stdin = input; |
---|
775 | stdinToClose = input; |
---|
776 | shell_env->forever = false; |
---|
777 | input_file =true; |
---|
778 | } |
---|
779 | else { |
---|
780 | /* make a raw terminal,Linux Manuals */ |
---|
781 | if (tcgetattr(fileno(stdin), &previous_term) >= 0) { |
---|
782 | term = previous_term; |
---|
783 | term.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON); |
---|
784 | term.c_oflag &= ~OPOST; |
---|
785 | term.c_oflag |= (OPOST|ONLCR); /* But with cr+nl on output */ |
---|
786 | term.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); |
---|
787 | term.c_cflag |= CLOCAL | CREAD; |
---|
788 | term.c_cc[VMIN] = 1; |
---|
789 | term.c_cc[VTIME] = 0; |
---|
790 | if (tcsetattr (fileno(stdin), TCSADRAIN, &term) < 0) { |
---|
791 | fprintf(stderr, |
---|
792 | "shell:cannot set terminal attributes(%s)\n",shell_env->devname); |
---|
793 | } |
---|
794 | } |
---|
795 | cmd_count = RTEMS_SHELL_CMD_COUNT; |
---|
796 | prompt = malloc(RTEMS_SHELL_PROMPT_SIZE); |
---|
797 | if (!prompt) |
---|
798 | fprintf(stderr, |
---|
799 | "shell:cannot allocate prompt memory\n"); |
---|
800 | } |
---|
801 | |
---|
802 | setvbuf(stdin,NULL,_IONBF,0); /* Not buffered*/ |
---|
803 | setvbuf(stdout,NULL,_IONBF,0); /* Not buffered*/ |
---|
804 | |
---|
805 | /* |
---|
806 | * Allocate the command line buffers. |
---|
807 | */ |
---|
808 | cmd_argv = malloc (RTEMS_SHELL_CMD_SIZE); |
---|
809 | if (!cmd_argv) { |
---|
810 | fprintf(stderr, "no memory for command line buffers\n" ); |
---|
811 | } |
---|
812 | |
---|
813 | cmds[0] = calloc (cmd_count, RTEMS_SHELL_CMD_SIZE); |
---|
814 | if (!cmds[0]) { |
---|
815 | fprintf(stderr, "no memory for command line buffers\n" ); |
---|
816 | } |
---|
817 | |
---|
818 | if (cmd_argv && cmds[0]) { |
---|
819 | |
---|
820 | memset (cmds[0], 0, cmd_count * RTEMS_SHELL_CMD_SIZE); |
---|
821 | |
---|
822 | for (cmd = 1; cmd < cmd_count; cmd++) { |
---|
823 | cmds[cmd] = cmds[cmd - 1] + RTEMS_SHELL_CMD_SIZE; |
---|
824 | } |
---|
825 | |
---|
826 | do { |
---|
827 | result = rtems_shell_init_user_env(); |
---|
828 | |
---|
829 | if (result) { |
---|
830 | /* |
---|
831 | * By using result here, we can fall to the bottom of the |
---|
832 | * loop when the connection is dropped during login and |
---|
833 | * keep on trucking. |
---|
834 | */ |
---|
835 | if (shell_env->login_check != NULL) { |
---|
836 | result = rtems_shell_login(shell_env, stdin,stdout); |
---|
837 | } else { |
---|
838 | setuid(shell_env->uid); |
---|
839 | setgid(shell_env->gid); |
---|
840 | seteuid(shell_env->uid); |
---|
841 | setegid(shell_env->gid); |
---|
842 | rtems_current_user_env_getgroups(); |
---|
843 | |
---|
844 | result = true; |
---|
845 | } |
---|
846 | } |
---|
847 | |
---|
848 | if (result) { |
---|
849 | const char *c; |
---|
850 | memset (cmds[0], 0, cmd_count * RTEMS_SHELL_CMD_SIZE); |
---|
851 | if (!input_file) { |
---|
852 | rtems_shell_cat_file(stdout,"/etc/motd"); |
---|
853 | fprintf(stdout, "\n" |
---|
854 | "RTEMS Shell on %s. Use 'help' to list commands.\n", |
---|
855 | shell_env->devname); |
---|
856 | } |
---|
857 | |
---|
858 | if (input_file) |
---|
859 | chdir(shell_env->cwd); |
---|
860 | else |
---|
861 | chdir("/"); /* XXX: chdir to getpwent homedir */ |
---|
862 | |
---|
863 | shell_env->exit_shell = false; |
---|
864 | |
---|
865 | for (;;) { |
---|
866 | int cmd; |
---|
867 | |
---|
868 | /* Prompt section */ |
---|
869 | if (prompt) { |
---|
870 | rtems_shell_get_prompt(shell_env, prompt, |
---|
871 | RTEMS_SHELL_PROMPT_SIZE); |
---|
872 | } |
---|
873 | |
---|
874 | /* getcmd section */ |
---|
875 | cmd = rtems_shell_line_editor(cmds, cmd_count, |
---|
876 | RTEMS_SHELL_CMD_SIZE, prompt, |
---|
877 | stdin, stdout); |
---|
878 | |
---|
879 | if (cmd == -1) |
---|
880 | continue; /* empty line */ |
---|
881 | |
---|
882 | if (cmd == -2) |
---|
883 | break; /*EOF*/ |
---|
884 | |
---|
885 | line++; |
---|
886 | |
---|
887 | if (shell_env->echo) |
---|
888 | fprintf(stdout, "%d: %s\n", line, cmds[cmd]); |
---|
889 | |
---|
890 | /* evaluate cmd section */ |
---|
891 | c = cmds[cmd]; |
---|
892 | while (*c) { |
---|
893 | if (!isblank((unsigned char)*c)) |
---|
894 | break; |
---|
895 | c++; |
---|
896 | } |
---|
897 | |
---|
898 | if (*c == '\0') /* empty line */ |
---|
899 | continue; |
---|
900 | |
---|
901 | if (*c == '#') { /* comment character */ |
---|
902 | cmds[cmd][0] = 0; |
---|
903 | continue; |
---|
904 | } |
---|
905 | |
---|
906 | if (!strcmp(cmds[cmd],"bye") || !strcmp(cmds[cmd],"exit")) { |
---|
907 | fprintf(stdout, "Shell exiting\n" ); |
---|
908 | break; |
---|
909 | } |
---|
910 | |
---|
911 | /* exec cmd section */ |
---|
912 | /* TODO: |
---|
913 | * To avoid user crash catch the signals. |
---|
914 | * Open a new stdio files with posibility of redirection * |
---|
915 | * Run in a new shell task background. (unix &) |
---|
916 | * Resuming. A little bash. |
---|
917 | */ |
---|
918 | memcpy (cmd_argv, cmds[cmd], RTEMS_SHELL_CMD_SIZE); |
---|
919 | if (!rtems_shell_make_args(cmd_argv, &argc, argv, |
---|
920 | RTEMS_SHELL_MAXIMUM_ARGUMENTS)) { |
---|
921 | shell_env->errorlevel = rtems_shell_execute_cmd(argv[0], argc, argv); |
---|
922 | } |
---|
923 | |
---|
924 | /* end exec cmd section */ |
---|
925 | if (shell_env->exit_shell) |
---|
926 | break; |
---|
927 | } |
---|
928 | |
---|
929 | fflush( stdout ); |
---|
930 | fflush( stderr ); |
---|
931 | } |
---|
932 | } while (result && shell_env->forever); |
---|
933 | |
---|
934 | } |
---|
935 | |
---|
936 | if (cmds[0]) |
---|
937 | free (cmds[0]); |
---|
938 | if (cmd_argv) |
---|
939 | free (cmd_argv); |
---|
940 | if (prompt) |
---|
941 | free (prompt); |
---|
942 | |
---|
943 | if (stdinToClose) { |
---|
944 | fclose( stdinToClose ); |
---|
945 | } else { |
---|
946 | if (tcsetattr(fileno(stdin), TCSADRAIN, &previous_term) < 0) { |
---|
947 | fprintf( |
---|
948 | stderr, |
---|
949 | "shell: cannot reset terminal attributes (%s)\n", |
---|
950 | shell_env->devname |
---|
951 | ); |
---|
952 | } |
---|
953 | } |
---|
954 | if ( stdoutToClose ) |
---|
955 | fclose( stdoutToClose ); |
---|
956 | return result; |
---|
957 | } |
---|
958 | |
---|
959 | /* ----------------------------------------------- */ |
---|
960 | static rtems_status_code rtems_shell_run ( |
---|
961 | const char *task_name, |
---|
962 | size_t task_stacksize, |
---|
963 | rtems_task_priority task_priority, |
---|
964 | const char *devname, |
---|
965 | bool forever, |
---|
966 | bool wait, |
---|
967 | const char *input, |
---|
968 | const char *output, |
---|
969 | bool output_append, |
---|
970 | rtems_id wake_on_end, |
---|
971 | bool echo, |
---|
972 | rtems_shell_login_check_t login_check |
---|
973 | ) |
---|
974 | { |
---|
975 | rtems_id task_id; |
---|
976 | rtems_status_code sc; |
---|
977 | rtems_shell_env_t *shell_env; |
---|
978 | rtems_name name; |
---|
979 | |
---|
980 | if ( task_name && strlen(task_name) >= 4) |
---|
981 | name = rtems_build_name( |
---|
982 | task_name[0], task_name[1], task_name[2], task_name[3]); |
---|
983 | else |
---|
984 | name = rtems_build_name( 'S', 'E', 'N', 'V' ); |
---|
985 | |
---|
986 | sc = rtems_task_create( |
---|
987 | name, |
---|
988 | task_priority, |
---|
989 | task_stacksize, |
---|
990 | RTEMS_PREEMPT | RTEMS_TIMESLICE | RTEMS_NO_ASR, |
---|
991 | RTEMS_LOCAL | RTEMS_FLOATING_POINT, |
---|
992 | &task_id |
---|
993 | ); |
---|
994 | if (sc != RTEMS_SUCCESSFUL) { |
---|
995 | return sc; |
---|
996 | } |
---|
997 | |
---|
998 | shell_env = rtems_shell_init_env( NULL ); |
---|
999 | if ( !shell_env ) { |
---|
1000 | return RTEMS_NO_MEMORY; |
---|
1001 | } |
---|
1002 | shell_env->devname = devname; |
---|
1003 | shell_env->taskname = task_name; |
---|
1004 | shell_env->exit_shell = false; |
---|
1005 | shell_env->forever = forever; |
---|
1006 | shell_env->echo = echo; |
---|
1007 | shell_env->input = strdup (input); |
---|
1008 | shell_env->output = strdup (output); |
---|
1009 | shell_env->output_append = output_append; |
---|
1010 | shell_env->wake_on_end = wake_on_end; |
---|
1011 | shell_env->login_check = login_check; |
---|
1012 | shell_env->uid = getuid(); |
---|
1013 | shell_env->gid = getgid(); |
---|
1014 | |
---|
1015 | getcwd(shell_env->cwd, sizeof(shell_env->cwd)); |
---|
1016 | |
---|
1017 | sc = rtems_task_start(task_id, rtems_shell_task, |
---|
1018 | (rtems_task_argument) shell_env); |
---|
1019 | if (sc != RTEMS_SUCCESSFUL) { |
---|
1020 | return sc; |
---|
1021 | } |
---|
1022 | |
---|
1023 | if (wait) { |
---|
1024 | rtems_event_set out; |
---|
1025 | sc = rtems_event_receive (RTEMS_EVENT_1, RTEMS_WAIT, 0, &out); |
---|
1026 | } |
---|
1027 | |
---|
1028 | return 0; |
---|
1029 | } |
---|
1030 | |
---|
1031 | rtems_status_code rtems_shell_init( |
---|
1032 | const char *task_name, |
---|
1033 | size_t task_stacksize, |
---|
1034 | rtems_task_priority task_priority, |
---|
1035 | const char *devname, |
---|
1036 | bool forever, |
---|
1037 | bool wait, |
---|
1038 | rtems_shell_login_check_t login_check |
---|
1039 | ) |
---|
1040 | { |
---|
1041 | rtems_id to_wake = RTEMS_ID_NONE; |
---|
1042 | |
---|
1043 | if ( wait ) |
---|
1044 | to_wake = rtems_task_self(); |
---|
1045 | |
---|
1046 | return rtems_shell_run( |
---|
1047 | task_name, /* task_name */ |
---|
1048 | task_stacksize, /* task_stacksize */ |
---|
1049 | task_priority, /* task_priority */ |
---|
1050 | devname, /* devname */ |
---|
1051 | forever, /* forever */ |
---|
1052 | wait, /* wait */ |
---|
1053 | "stdin", /* input */ |
---|
1054 | "stdout", /* output */ |
---|
1055 | false, /* output_append */ |
---|
1056 | to_wake, /* wake_on_end */ |
---|
1057 | false, /* echo */ |
---|
1058 | login_check /* login check */ |
---|
1059 | ); |
---|
1060 | } |
---|
1061 | |
---|
1062 | rtems_status_code rtems_shell_script ( |
---|
1063 | const char *task_name, |
---|
1064 | size_t task_stacksize, |
---|
1065 | rtems_task_priority task_priority, |
---|
1066 | const char* input, |
---|
1067 | const char* output, |
---|
1068 | bool output_append, |
---|
1069 | bool wait, |
---|
1070 | bool echo |
---|
1071 | ) |
---|
1072 | { |
---|
1073 | rtems_id current_task = RTEMS_INVALID_ID; |
---|
1074 | rtems_status_code sc; |
---|
1075 | |
---|
1076 | if (wait) { |
---|
1077 | sc = rtems_task_ident (RTEMS_SELF, RTEMS_LOCAL, ¤t_task); |
---|
1078 | if (sc != RTEMS_SUCCESSFUL) |
---|
1079 | return sc; |
---|
1080 | } |
---|
1081 | |
---|
1082 | sc = rtems_shell_run( |
---|
1083 | task_name, /* task_name */ |
---|
1084 | task_stacksize, /* task_stacksize */ |
---|
1085 | task_priority, /* task_priority */ |
---|
1086 | NULL, /* devname */ |
---|
1087 | 0, /* forever */ |
---|
1088 | wait, /* wait */ |
---|
1089 | input, /* input */ |
---|
1090 | output, /* output */ |
---|
1091 | output_append, /* output_append */ |
---|
1092 | current_task, /* wake_on_end */ |
---|
1093 | echo, /* echo */ |
---|
1094 | NULL /* login check */ |
---|
1095 | ); |
---|
1096 | if (sc != RTEMS_SUCCESSFUL) |
---|
1097 | return sc; |
---|
1098 | |
---|
1099 | return sc; |
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1100 | } |
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