1 | #!/bin/bash
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2 | ########################################################################
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3 | # Begin rc
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4 | #
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5 | # Description : Main Run Level Control Script
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6 | #
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7 | # Authors : Gerard Beekmans - gerard@linuxfromscratch.org
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8 | # : DJ Lucas - dj@linuxfromscratch.org
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9 | # Update : Bruce Dubbs - bdubbs@linuxfromscratch.org
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10 | #
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11 | # Version : LFS 7.0
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12 | #
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13 | ########################################################################
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14 |
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15 | . /lib/lsb/init-functions
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16 |
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17 | function print_error_msg()
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18 | {
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19 | log_failure_msg
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20 | # $i is set when called
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21 | MSG="FAILURE:\n\nYou should not be reading this error message.\n\n"
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22 | MSG="${MSG}It means that an unforeseen error took place in\n"
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23 | MSG="${MSG}${i},\n"
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24 | MSG="${MSG}which exited with a return value of ${error_value}.\n"
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25 |
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26 | MSG="${MSG}If you're able to track this error down to a bug in one of\n"
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27 | MSG="${MSG}the files provided by the files provided by\n"
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28 | MSG="${MSG}the ${DISDRI_MINI} book, please be so kind to inform us at\n"
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29 | MSG="${MSG}${DISTRO_CONTACT}.\n"
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30 | log_failure_msg "${MSG}"
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31 |
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32 | log_info_msg "Press Enter to continue..."
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33 | wait_for_user
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34 | }
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35 |
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36 | function check_script_status()
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37 | {
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38 | # $i is set when called
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39 | if [ ! -f ${i} ]; then
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40 | log_warning_msg "${i} is not a valid symlink."
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41 | continue
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42 | fi
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43 |
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44 | if [ ! -x ${i} ]; then
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45 | log_warning_msg "${i} is not executable, skipping."
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46 | continue
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47 | fi
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48 | }
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49 |
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50 | function run()
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51 | {
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52 | if [ -z $interactive ]; then
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53 | ${1} ${2}
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54 | return $?
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55 | fi
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56 |
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57 | while true; do
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58 | read -p "Run ${1} ${2} (Yes/no/continue)? " -n 1 runit
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59 | echo
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60 |
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61 | case ${runit} in
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62 | c | C)
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63 | interactive=""
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64 | ${i} ${2}
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65 | ret=${?}
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66 | break;
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67 | ;;
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68 |
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69 | n | N)
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70 | return 0
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71 | ;;
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72 |
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73 | y | Y)
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74 | ${i} ${2}
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75 | ret=${?}
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76 | break
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77 | ;;
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78 | esac
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79 | done
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80 |
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81 | return $ret
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82 | }
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83 |
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84 | # Read any local settings/overrides
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85 | [ -r /etc/sysconfig/rc.site ] && source /etc/sysconfig/rc.site
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86 |
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87 | DISTRO=${DISTRO:-"Linux From Scratch"}
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88 | DISTRO_CONTACT=${DISTRO_CONTACT:-"lfs-dev@linuxfromscratch.org (Registration required)"}
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89 | DISTRO_MINI=${DISTRO_MINI:-"LFS"}
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90 | IPROMPT=${IPROMPT:-"no"}
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91 |
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92 | # These 3 signals will not cause our script to exit
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93 | trap "" INT QUIT TSTP
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94 |
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95 | [ "${1}" != "" ] && runlevel=${1}
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96 |
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97 | if [ "${runlevel}" == "" ]; then
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98 | echo "Usage: ${0} <runlevel>" >&2
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99 | exit 1
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100 | fi
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101 |
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102 | previous=${PREVLEVEL}
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103 | [ "${previous}" == "" ] && previous=N
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104 |
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105 | if [ ! -d /etc/rc.d/rc${runlevel}.d ]; then
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106 | log_info_msg "/etc/rc.d/rc${runlevel}.d does not exist.\n"
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107 | exit 1
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108 | fi
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109 |
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110 | if [ "$runlevel" == "6" -o "$runlevel" == "0" ]; then IPROMPT="no"; fi
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111 |
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112 | # Note: In ${LOGLEVEL:-7}, it is ':' 'dash' '7', not minus 7
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113 | if [ "$runlevel" == "S" ]; then dmesg -n "${LOGLEVEL:-7}"; fi
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114 |
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115 | if [ "${IPROMPT}" == "yes" -a "${runlevel}" == "S" ]; then
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116 | # The total length of the distro welcome string, without escape codes
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117 | wlen=${wlen:-$(echo "Welcome to ${DISTRO}" | wc -c )}
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118 | welcome_message=${welcome_message:-"Welcome to ${INFO}${DISTRO}${NORMAL}"}
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119 |
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120 | # The total length of the interactive string, without escape codes
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121 | ilen=${ilen:-$(echo "Press 'I' to enter interactive startup" | wc -c )}
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122 | i_message=${i_message:-"Press '${FAILURE}I${NORMAL}' to enter interactive startup"}
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123 |
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124 |
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125 | # dcol and icol are spaces before the message to center the message
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126 | # on screen. itime is the amount of wait time for the user to press a key
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127 | wcol=$(( ( ${COLUMNS} - ${wlen} ) / 2 ))
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128 | icol=$(( ( ${COLUMNS} - ${ilen} ) / 2 ))
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129 | itime=${itime:-"3"}
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130 |
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131 | echo -e "\n\n"
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132 | echo -e "\\033[${wcol}G${welcome_message}"
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133 | echo -e "\\033[${icol}G${i_message}${NORMAL}"
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134 | echo ""
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135 | read -t "${itime}" -n 1 interactive 2>&1 > /dev/null
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136 | fi
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137 |
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138 | # Make lower case
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139 | [ "${interactive}" == "I" ] && interactive="i"
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140 | [ "${interactive}" != "i" ] && interactive=""
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141 |
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142 | # Read the state file if it exists from runlevel S
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143 | [ -r /var/run/interactive ] && source /var/run/interactive
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144 |
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145 | # Attempt to stop all services started by the previous runlevel,
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146 | # and killed in this runlevel
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147 | if [ "${previous}" != "N" ]; then
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148 | for i in $(ls -v /etc/rc.d/rc${runlevel}.d/K* 2> /dev/null)
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149 | do
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150 | check_script_status
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151 |
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152 | suffix=${i#/etc/rc.d/rc$runlevel.d/K[0-9][0-9]}
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153 | prev_start=/etc/rc.d/rc$previous.d/S[0-9][0-9]$suffix
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154 | sysinit_start=/etc/rc.d/rcS.d/S[0-9][0-9]$suffix
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155 |
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156 | if [ "${runlevel}" != "0" -a "${runlevel}" != "6" ]; then
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157 | if [ ! -f ${prev_start} -a ! -f ${sysinit_start} ]; then
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158 | MSG="WARNING:\n\n${i} can't be "
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159 | MSG="${MSG}executed because it was not "
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160 | MSG="${MSG}not started in the previous "
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161 | MSG="${MSG}runlevel (${previous})."
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162 | log_warning_msg "$MSG"
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163 | continue
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164 | fi
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165 | fi
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166 |
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167 | run ${i} stop
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168 | error_value=${?}
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169 |
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170 | if [ "${error_value}" != "0" ]; then print_error_msg; fi
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171 | done
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172 | fi
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173 |
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174 | if [ "${previous}" == "N" ]; then export IN_BOOT=1; fi
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175 |
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176 | if [ "$runlevel" == "6" -a -n "${FASTBOOT}" ]; then
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177 | touch /fastboot
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178 | fi
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179 |
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180 |
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181 | # Start all functions in this runlevel
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182 | for i in $( ls -v /etc/rc.d/rc${runlevel}.d/S* 2> /dev/null)
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183 | do
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184 | if [ "${previous}" != "N" ]; then
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185 | suffix=${i#/etc/rc.d/rc$runlevel.d/S[0-9][0-9]}
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186 | stop=/etc/rc.d/rc$runlevel.d/K[0-9][0-9]$suffix
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187 | prev_start=/etc/rc.d/rc$previous.d/S[0-9][0-9]$suffix
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188 |
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189 | [ -f ${prev_start} -a ! -f ${stop} ] && continue
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190 | fi
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191 |
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192 | check_script_status
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193 |
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194 | case ${runlevel} in
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195 | 0|6)
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196 | run ${i} stop
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197 | ;;
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198 | *)
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199 | run ${i} start
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200 | ;;
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201 | esac
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202 |
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203 | error_value=${?}
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204 |
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205 | if [ "${error_value}" != "0" ]; then print_error_msg; fi
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206 | done
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207 |
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208 | # Store interactive variable on switch from runlevel S and remove if not
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209 | if [ "${runlevel}" == "S" -a "${interactive}" == "i" ]; then
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210 | echo "interactive=\"i\"" > /var/run/interactive
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211 | else
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212 | rm -f /var/run/interactive 2> /dev/null
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213 | fi
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214 |
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215 | # Copy the boot log on initial boot only
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216 | if [ "${previous}" == "N" -a "${runlevel}" != "S" ]; then
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217 | cat /run/var/bootlog >> /var/log/boot.log
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218 |
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219 | # Mark the end of boot
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220 | echo "--------" >> /var/log/boot.log
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221 |
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222 | # Remove the temporary file
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223 | rm -f /run/var/bootlog 2> /dev/null
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224 | fi
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225 |
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226 | # End rc
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