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annotate packages/redboot/current/src/io.c @ 191:678094f34118

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Merge from eCos master repository on 2001-10-19-06:43:02-BST
author jlarmour
date Fri, 19 Oct 2001 07:02:26 +0000
parents f62680ef1804
children feb0fcf83327
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1 //==========================================================================
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2 //
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3 // io.c
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4 //
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5 // RedBoot I/O support
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000, 2001 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): gthomas
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35 // Contributors: gthomas,hmt,jlarmour
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36 // Date: 2000-07-14
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37 // Purpose:
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38 // Description:
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39 //
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40 // This code is part of RedBoot (tm).
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41 //
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42 //####DESCRIPTIONEND####
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43 //
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44 //==========================================================================
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45
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46 #include "redboot.h"
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47
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48 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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49 // GDB interface functions
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50 extern void ungetDebugChar(char c);
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51 #endif
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52
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53 static void
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54 do_channel(int argc, char *argv[]);
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55
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56 #ifdef CYGPKG_REDBOOT_ANY_CONSOLE
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57 RedBoot_cmd("channel",
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58 "Display/switch console channel",
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59 "[-1|<channel number>]",
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60 do_channel
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61 );
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62 #else
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63 RedBoot_cmd("channel",
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64 "Display/switch console channel",
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65 "[<channel number>]",
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66 do_channel
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67 );
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68 #endif
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69
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70 static void
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71 do_channel(int argc, char *argv[])
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72 {
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73 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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74
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75 if (argc == 2) {
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76 #ifdef CYGPKG_REDBOOT_ANY_CONSOLE
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77 if (strcmp( argv[1], "-1") == 0) {
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78 console_selected = false;
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79 console_echo = true;
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80 } else
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81 #endif
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82 {
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83 unsigned long chan;
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84 if ( !parse_num( argv[1], &chan, NULL, NULL) ) {
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85 diag_printf("** Error: invalid channel '%s'\n", argv[1]);
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86 } else {
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87 if (chan < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS) {
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88 CYGACC_CALL_IF_SET_CONSOLE_COMM(chan);
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89 CYGACC_CALL_IF_SET_DEBUG_COMM(chan);
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90 if (chan != cur)
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91 console_echo = true;
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92 }
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93 else {
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94 diag_printf("**Error: bad channel number '%s'\n", argv[1]);
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95 }
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96 }
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97 }
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98 }
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99 /* else display */
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100 else {
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101 diag_printf("Current console channel id: ");
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102 #ifdef CYGPKG_REDBOOT_ANY_CONSOLE
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103 if (!console_selected)
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104 diag_printf("-1\n");
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105 else
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106 #endif
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107 diag_printf("%d\n", cur);
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108 }
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109 }
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110
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111 void
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112 mon_write_char(char c)
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113 {
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114 hal_virtual_comm_table_t *__chan;
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115
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116 #ifdef CYGPKG_REDBOOT_ANY_CONSOLE
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117 if (!console_selected) {
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118 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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119 int i;
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120 // Send output to all channels
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121 for (i = 0; i < CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS; i++) {
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122 CYGACC_CALL_IF_SET_CONSOLE_COMM(i);
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123 __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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124 CYGACC_COMM_IF_PUTC(*__chan, c);
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125 }
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126 CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
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127 } else
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128 #endif
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129 {
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130 __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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131 if (__chan)
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132 CYGACC_COMM_IF_PUTC(*__chan, c);
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133 else {
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134 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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135 CYGACC_COMM_IF_PUTC(*__chan, c);
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136 }
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137 }
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138 }
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139
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140 static void
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141 mon_read_char(char *c)
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142 {
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143 hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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144
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145 if (__chan)
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146 *c = CYGACC_COMM_IF_GETC(*__chan);
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147 else {
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148 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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149 *c = CYGACC_COMM_IF_GETC(*__chan);
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150 }
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151 }
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152
156
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153 #ifdef CYGPKG_REDBOOT_ANY_CONSOLE
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154 static int _mon_timeout;
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155 #endif
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156
115
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157 static bool
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158 mon_read_char_with_timeout(char *c)
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159 {
156
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160 bool res = false;
115
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161 hal_virtual_comm_table_t *__chan;
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162
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163 #ifdef CYGPKG_REDBOOT_ANY_CONSOLE
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164 if (!console_selected) {
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165 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
156
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166 int i, tot;
115
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167 // Try input from all channels
156
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168 tot = 0;
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169 while (tot < _mon_timeout) {
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170 for (i = 0; i < CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS; i++, tot++) {
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171 CYGACC_CALL_IF_SET_CONSOLE_COMM(i);
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172 __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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173 res = CYGACC_COMM_IF_GETC_TIMEOUT(*__chan, c);
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174 if (res) {
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175 // Input available on this channel, make it be the console
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176 if (*c != '\0') {
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177 // Don't chose this unless real data have arrived
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178 console_selected = true;
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179 CYGACC_CALL_IF_SET_DEBUG_COMM(i);
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180 return res;
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181 }
126
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182 }
115
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183 }
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184 }
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185 CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
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186 } else
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187 #endif
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188 {
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189 __chan = CYGACC_CALL_IF_CONSOLE_PROCS();
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190 if (__chan)
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191 res = CYGACC_COMM_IF_GETC_TIMEOUT(*__chan, c);
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192 else {
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193 __chan = CYGACC_CALL_IF_DEBUG_PROCS();
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194 res = CYGACC_COMM_IF_GETC_TIMEOUT(*__chan, c);
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195 }
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196 }
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197 return res;
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198 }
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199
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200 static void
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201 mon_set_read_char_timeout(int ms)
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202 {
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203 hal_virtual_comm_table_t *__chan;
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204
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205 #ifdef CYGPKG_REDBOOT_ANY_CONSOLE
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206 if (!console_selected) {
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207 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
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208 int i;
156
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209 // Set timeout to minimum on each channel; total amounts to desired value
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210 _mon_timeout = ms;
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211 ms = 1;
115
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212 for (i = 0; i < CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS; i++) {
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213 CYGACC_CALL_IF_SET_CONSOLE_COMM(i);
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214 if ((__chan = CYGACC_CALL_IF_CONSOLE_PROCS()) != 0) {
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215 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_SET_TIMEOUT, ms);
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216 }
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217 }
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218 CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
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219 } else
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220 #endif
172
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221 {
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222 if ((__chan = CYGACC_CALL_IF_CONSOLE_PROCS()) != 0) {
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223 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_SET_TIMEOUT, ms);
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224 }
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225 if ((__chan = CYGACC_CALL_IF_DEBUG_PROCS()) != 0) {
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226 CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_SET_TIMEOUT, ms);
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227 }
115
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228 }
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229 }
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230
179
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231 #ifdef CYGFUN_REDBOOT_BOOT_SCRIPT
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232 #define __STRINGIFY(x) #x
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233 #define _STRINGIFY(x) __STRINGIFY(x)
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234 #define _STARTUP_STR _STRINGIFY(CYG_HAL_STARTUP) "}"
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235
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236 //
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237 // Read a character from script.
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238 // Return true if script character found, false if not.
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239 //
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240 static int
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241 getc_script(char *cp)
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242 {
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243 static bool newline = true;
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244 bool skip;
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245
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246 while (script && *script) {
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247 if (newline && *script == '{') {
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248 skip = false;
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249 ++script;
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250
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251 // skip if it isn't for this startup type
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252 if (strncmp(script, _STARTUP_STR, strlen(_STARTUP_STR)))
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253 skip = true;
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254
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255 // skip past "{...}"
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256 while (*script && *script++ != '}')
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257 ;
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258
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259 // skip script line if neccessary
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260 if (skip) {
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261 while (*script && *script++ != '\n')
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262 ;
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263 } else
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264 newline = false;
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265
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266 } else {
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267 *cp = *script++;
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268 if (*cp == '\n')
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269 newline = true;
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270 return true;
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271 }
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272 }
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273 return false;
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274 }
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275 #endif
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276
115
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277 //
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278 // Read a line of input from the user
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279 // Return:
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280 // n: 'n' valid characters received
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281 // 0: '$' (GDB lead-in)
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282 // -1: No input before timeout
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283 // -2: ^C typed
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284 //
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285 int
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286 _rb_gets(char *buf, int buflen, int timeout)
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287 {
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288 char *ptr = buf;
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289 char c;
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290 bool res = false;
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291 static char last_ch = '\0';
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292
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293 while (true) {
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294 #ifdef CYGFUN_REDBOOT_BOOT_SCRIPT
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295 if (getc_script(&c))
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296 do_idle(false);
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297 else
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298 #endif
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299 if ((timeout > 0) && (ptr == buf)) {
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300 #define MIN_TIMEOUT 50
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301 mon_set_read_char_timeout(timeout > MIN_TIMEOUT ? MIN_TIMEOUT : timeout);
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302 while (timeout > 0) {
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303 res = mon_read_char_with_timeout(&c);
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304 if (res) {
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305 // Got a character
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306 do_idle(false);
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307 break;
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308 }
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309 timeout -= MIN_TIMEOUT;
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310 }
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311 if (res == false) {
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312 do_idle(true);
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313 return _GETS_TIMEOUT; // Input timed out
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314 }
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315 } else {
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316 mon_read_char(&c);
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317 }
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318 *ptr = '\0';
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319 switch (c) {
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320 case 0x03: // ^C
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321 if (ptr == buf) {
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322 diag_printf("^C\n");
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323 return _GETS_CTRLC;
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324 }
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325 *ptr++ = c;
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326 break;
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327 case '\n':
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328 case '\r':
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329 // If previous character was the "other" end-of-line, ignore this one
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330 if (((c == '\n') && (last_ch == '\r')) ||
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331 ((c == '\r') && (last_ch == '\n'))) {
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332 c = '\0';
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333 break;
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334 }
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335 // End of line
128
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336 if (console_echo) {
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337 mon_write_char('\r');
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338 mon_write_char('\n');
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339 }
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340 last_ch = c;
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341 return _GETS_OK;
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342 case '\b':
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343 case 0x7F: // DEL
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344 if (ptr != buf) {
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345 if (console_echo) {
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346 mon_write_char('\b');
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347 mon_write_char(' ');
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348 mon_write_char('\b');
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349 }
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350 ptr--;
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351 }
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352 break;
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353 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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354 case '+': // fall through
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355 case '$':
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356 if (ptr == buf || last_ch != '\\')
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357 {
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358 // Give up and try GDB protocol
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359 ungetDebugChar(c); // Push back character so stubs will see it
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360 return _GETS_GDB;
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361 }
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362 if (last_ch == '\\') {
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363 ptr--; // Save \$ as $
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364 }
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365 // else fall through
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366 #endif
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367 default:
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368 if (console_echo) {
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369 mon_write_char(c);
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370 }
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371 *ptr++ = c;
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372 }
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373 last_ch = c;
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374 if (ptr == buf + buflen) // Buffer full
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375 return buflen;
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376 }
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377 }
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378
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379 bool
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380 verify_action(char *fmt, ...)
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381 {
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382 va_list ap;
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383 char ans[8];
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384 #ifdef CYGFUN_REDBOOT_BOOT_SCRIPT
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385 // Don't ask if we're executing a script
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386 if (script && *script)
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387 return 1;
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388 #endif
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389
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390 va_start(ap, fmt);
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391 diag_vprintf(fmt, ap);
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392 diag_printf(" - are you sure (y/n)? ");
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393 _rb_gets(ans, sizeof(ans), 0);
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394 return ((ans[0] == 'y') || (ans[0] == 'Y'));
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395 }