1 | #!/bin/sh |
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2 | ######################################################################## |
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3 | # Begin $rc_base/init.d/functions |
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4 | # |
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5 | # Description : Run Level Control Functions |
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6 | # |
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7 | # Authors : Gerard Beekmans - gerard@linuxfromscratch.org |
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8 | # |
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9 | # Version : 00.00 |
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10 | # |
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11 | # Notes : With code based on Matthias Benkmann's simpleinit-msb |
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12 | # http://winterdrache.de/linux/newboot/index.html |
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13 | # |
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14 | ######################################################################## |
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15 | |
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16 | ## Environmental setup |
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17 | # Setup default values for environment |
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18 | umask 022 |
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19 | export PATH="/bin:/usr/bin:/sbin:/usr/sbin" |
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20 | |
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21 | # Signal sent to running processes to refresh their configuration |
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22 | RELOADSIG="HUP" |
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23 | |
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24 | # Number of seconds between STOPSIG and FALLBACK when stopping processes |
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25 | KILLDELAY="3" |
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26 | |
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27 | ## Screen Dimensions |
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28 | # Find current screen size |
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29 | if [ -z "${COLUMNS}" ]; then |
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30 | COLUMNS=$(stty size) |
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31 | COLUMNS=${COLUMNS##* } |
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32 | fi |
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33 | |
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34 | # When using remote connections, such as a serial port, stty size returns 0 |
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35 | if [ "${COLUMNS}" = "0" ]; then |
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36 | COLUMNS=80 |
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37 | fi |
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38 | |
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39 | ## Measurements for positioning result messages |
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40 | COL=$((${COLUMNS} - 8)) |
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41 | WCOL=$((${COL} - 2)) |
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42 | |
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43 | ## Set Cursor Position Commands, used via echo -e |
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44 | SET_COL="\\033[${COL}G" # at the $COL char |
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45 | SET_WCOL="\\033[${WCOL}G" # at the $WCOL char |
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46 | CURS_UP="\\033[1A\\033[0G" # Up one line, at the 0'th char |
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47 | |
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48 | ## Set color commands, used via echo -e |
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49 | # Please consult `man console_codes for more information |
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50 | # under the "ECMA-48 Set Graphics Rendition" section |
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51 | # |
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52 | # Warning: when switching from a 8bit to a 9bit font, |
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53 | # the linux console will reinterpret the bold (1;) to |
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54 | # the top 256 glyphs of the 9bit font. This does |
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55 | # not affect framebuffer consoles |
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56 | NORMAL="\\033[0;39m" # Standard console grey |
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57 | SUCCESS="\\033[1;32m" # Success is green |
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58 | WARNING="\\033[1;33m" # Warnings are yellow |
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59 | FAILURE="\\033[1;31m" # Failures are red |
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60 | INFO="\\033[1;36m" # Information is light cyan |
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61 | BRACKET="\\033[1;34m" # Brackets are blue |
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62 | |
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63 | STRING_LENGTH="0" # the length of the current message |
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64 | |
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65 | #******************************************************************************* |
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66 | # Function - boot_mesg() |
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67 | # |
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68 | # Purpose: Sending information from bootup scripts to the console |
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69 | # |
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70 | # Inputs: $1 is the message |
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71 | # $2 is the colorcode for the console |
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72 | # |
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73 | # Outputs: Standard Output |
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74 | # |
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75 | # Dependencies: - sed for parsing strings. |
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76 | # - grep for counting string length. |
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77 | # |
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78 | # Todo: |
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79 | #******************************************************************************* |
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80 | boot_mesg() |
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81 | { |
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82 | local ECHOPARM="" |
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83 | |
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84 | while true |
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85 | do |
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86 | case "${1}" in |
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87 | -n) |
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88 | ECHOPARM=" -n " |
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89 | shift 1 |
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90 | ;; |
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91 | -*) |
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92 | echo "Unknown Option: ${1}" |
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93 | return 1 |
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94 | ;; |
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95 | *) |
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96 | break |
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97 | ;; |
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98 | esac |
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99 | done |
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100 | |
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101 | ## Figure out the length of what is to be printed to be used |
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102 | ## for warning messges. |
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103 | STRING_LENGTH="`echo "${1}" | sed \ |
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104 | -e 's,.,.,g' -e 'l 1' | grep -c \$`" |
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105 | |
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106 | # Print the message to the screen |
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107 | echo ${ECHOPARM} -e "${2}${1}" |
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108 | |
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109 | } |
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110 | |
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111 | boot_mesg_flush() |
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112 | { |
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113 | # Reset STRING_LENGTH for next message |
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114 | STRING_LENGTH="0" |
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115 | } |
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116 | |
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117 | boot_log() |
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118 | { |
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119 | # Left in for backwards compatibility |
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120 | echo -n "" |
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121 | } |
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122 | |
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123 | echo_ok() |
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124 | { |
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125 | echo -n -e "${CURS_UP}${SET_COL}${BRACKET}[${SUCCESS} OK ${BRACKET}]" |
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126 | echo -e "${NORMAL}" |
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127 | boot_mesg_flush "[ OK ]" |
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128 | } |
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129 | |
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130 | echo_failure() |
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131 | { |
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132 | echo -n -e "${CURS_UP}${SET_COL}${BRACKET}[${FAILURE} FAIL ${BRACKET}]" |
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133 | echo -e "${NORMAL}" |
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134 | boot_mesg_flush "[ FAIL ]" |
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135 | } |
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136 | |
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137 | echo_warning() |
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138 | { |
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139 | echo -n -e "${CURS_UP}${SET_COL}${BRACKET}[${WARNING} WARN ${BRACKET}]" |
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140 | echo -e "${NORMAL}" |
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141 | boot_mesg_flush "[ WARN ]" |
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142 | } |
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143 | |
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144 | print_error_msg() |
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145 | { |
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146 | echo_failure |
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147 | # $i is inherited by the rc script |
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148 | boot_log "\n\n${i} failed and exited with a return value of ${error_value}." |
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149 | boot_mesg_flush |
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150 | boot_mesg -n "FAILURE:\n\nYou should not be reading this error message.\n\n" ${FAILURE} |
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151 | boot_mesg -n " It means that an unforeseen error took" |
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152 | boot_mesg -n " place in ${i}, which exited with a return value of" |
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153 | boot_mesg " ${error_value}.\n" |
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154 | boot_mesg_flush |
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155 | boot_mesg -n "If you're able to track this" |
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156 | boot_mesg -n " error down to a bug in one of the files provided by" |
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157 | boot_mesg -n " the LFS book, please be so kind to inform us at" |
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158 | boot_mesg " lfs-dev@linuxfromscratch.org.\n" |
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159 | boot_mesg_flush |
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160 | boot_mesg -n "Press Enter to continue..." ${INFO} |
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161 | boot_mesg "" ${NORMAL} |
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162 | read ENTER |
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163 | } |
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164 | |
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165 | check_script_status() |
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166 | { |
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167 | # $i is inherited by the rc script |
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168 | if [ ! -f ${i} ]; then |
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169 | boot_mesg "${i} is not a valid symlink." ${WARNING} |
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170 | echo_warning |
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171 | continue |
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172 | fi |
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173 | |
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174 | if [ ! -x ${i} ]; then |
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175 | boot_mesg "${i} is not executable, skipping." ${WARNING} |
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176 | echo_warning |
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177 | continue |
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178 | fi |
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179 | } |
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180 | |
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181 | evaluate_retval() |
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182 | { |
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183 | error_value="${?}" |
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184 | |
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185 | if [ ${error_value} = 0 ]; then |
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186 | echo_ok |
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187 | else |
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188 | echo_failure |
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189 | fi |
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190 | |
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191 | # This prevents the 'An Unexpected Error Has Occurred' from trivial |
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192 | # errors. |
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193 | return 0 |
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194 | } |
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195 | |
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196 | print_status() |
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197 | { |
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198 | if [ "${#}" = "0" ]; then |
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199 | echo "Usage: ${0} {success|warning|failure}" |
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200 | return 1 |
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201 | fi |
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202 | |
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203 | # boot_mesg_flush |
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204 | # echo_warning |
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205 | |
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206 | case "${1}" in |
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207 | |
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208 | success) |
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209 | echo_ok |
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210 | ;; |
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211 | |
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212 | warning) |
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213 | # Leave this extra case in because old scripts |
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214 | # may call it this way. |
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215 | case "${2}" in |
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216 | running) |
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217 | echo -e -n "${CURS_UP}" |
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218 | echo -e -n "\\033[${STRING_LENGTH}G " |
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219 | boot_mesg "Already running." ${WARNING} |
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220 | echo_warning |
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221 | ;; |
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222 | not_running) |
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223 | echo -e -n "${CURS_UP}" |
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224 | echo -e -n "\\033[${STRING_LENGTH}G " |
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225 | boot_mesg "Not running." ${WARNING} |
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226 | echo_warning |
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227 | ;; |
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228 | not_available) |
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229 | echo -e -n "${CURS_UP}" |
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230 | echo -e -n "\\033[${STRING_LENGTH}G " |
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231 | boot_mesg "Not available." ${WARNING} |
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232 | echo_warning |
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233 | ;; |
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234 | *) |
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235 | # This is how it is supposed to |
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236 | # be called |
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237 | echo_warning |
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238 | ;; |
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239 | esac |
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240 | ;; |
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241 | |
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242 | failure) |
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243 | echo_failure |
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244 | ;; |
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245 | |
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246 | esac |
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247 | |
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248 | } |
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249 | |
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250 | reloadproc() |
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251 | { |
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252 | if [ "${#}" = "0" ]; then |
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253 | echo "Usage: reloadproc [{program}]" |
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254 | exit 1 |
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255 | fi |
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256 | |
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257 | getpids "${1}" |
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258 | |
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259 | if [ -n "${pidlist}" ]; then |
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260 | failure="0" |
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261 | for pid in ${pidlist} |
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262 | do |
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263 | kill -"${RELOADSIG}" "${pid}" || failure="1" |
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264 | done |
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265 | |
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266 | (exit ${failure}) |
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267 | evaluate_retval |
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268 | |
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269 | else |
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270 | boot_mesg "Process ${1} not running." ${WARNING} |
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271 | echo_warning |
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272 | fi |
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273 | } |
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274 | |
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275 | statusproc() |
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276 | { |
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277 | if [ "${#}" = "0" ] |
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278 | then |
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279 | echo "Usage: statusproc {program}" |
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280 | exit 1 |
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281 | fi |
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282 | |
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283 | getpids "${1}" |
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284 | |
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285 | if [ -n "${pidlist}" ]; then |
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286 | echo -e "${INFO}${base} is running with Process"\ |
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287 | "ID(s) ${pidlist}.${NORMAL}" |
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288 | else |
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289 | if [ -n "${base}" -a -e "/var/run/${base}.pid" ]; then |
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290 | echo -e "${WARNING}${1} is not running but"\ |
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291 | "/var/run/${base}.pid exists.${NORMAL}" |
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292 | else |
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293 | if [ -n "${PIDFILE}" -a -e "${PIDFILE}" ]; then |
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294 | echo -e "${WARNING}${1} is not running"\ |
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295 | "but ${PIDFILE} exists.${NORMAL}" |
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296 | else |
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297 | echo -e "${INFO}${1} is not running.${NORMAL}" |
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298 | fi |
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299 | fi |
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300 | fi |
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301 | } |
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302 | |
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303 | # The below functions are documented in the LSB-generic 2.1.0 |
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304 | |
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305 | #******************************************************************************* |
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306 | # Function - pidofproc [-s] [-p pidfile] pathname |
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307 | # |
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308 | # Purpose: This function returns one or more pid(s) for a particular daemon |
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309 | # |
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310 | # Inputs: -p pidfile, use the specified pidfile instead of pidof |
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311 | # pathname, path to the specified program |
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312 | # |
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313 | # Outputs: return 0 - Success, pid's in stdout |
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314 | # return 1 - Program is dead, pidfile exists |
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315 | # return 2 - Invalid or excessive number of arguments, |
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316 | # warning in stdout |
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317 | # return 3 - Program is not running |
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318 | # |
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319 | # Dependencies: pidof, echo, head |
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320 | # |
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321 | # Todo: Remove dependency on head |
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322 | # This depreciates getpids |
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323 | # Test changes to pidof |
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324 | # |
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325 | #******************************************************************************* |
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326 | pidofproc() |
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327 | { |
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328 | local pidfile="" |
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329 | local lpids="" |
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330 | local silent="" |
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331 | pidlist="" |
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332 | while true |
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333 | do |
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334 | case "${1}" in |
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335 | -p) |
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336 | pidfile="${2}" |
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337 | shift 2 |
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338 | ;; |
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339 | |
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340 | -s) |
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341 | # Added for legacy opperation of getpids |
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342 | # eliminates several '> /dev/null' |
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343 | silent="1" |
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344 | shift 1 |
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345 | ;; |
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346 | -*) |
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347 | log_failure_msg "Unknown Option: ${1}" |
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348 | return 2 |
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349 | ;; |
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350 | *) |
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351 | break |
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352 | ;; |
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353 | esac |
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354 | done |
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355 | |
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356 | if [ "${#}" != "1" ]; then |
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357 | shift 1 |
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358 | log_failure_msg "Usage: pidofproc [-s] [-p pidfile] pathname" |
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359 | return 2 |
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360 | fi |
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361 | |
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362 | if [ -n "${pidfile}" ]; then |
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363 | if [ ! -r "${pidfile}" ]; then |
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364 | return 3 # Program is not running |
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365 | fi |
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366 | |
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367 | lpids=`head -n 1 ${pidfile}` |
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368 | for pid in ${lpids} |
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369 | do |
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370 | if [ "${pid}" -ne "$$" -a "${pid}" -ne "${PPID}" ]; then |
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371 | kill -0 "${pid}" > /dev/null && |
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372 | pidlist="${pidlist} ${pid}" |
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373 | fi |
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374 | |
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375 | if [ "${silent}" -ne "1" ]; then |
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376 | echo "${pidlist}" |
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377 | fi |
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378 | |
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379 | test -z "${pidlist}" && |
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380 | # Program is dead, pidfile exists |
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381 | return 1 |
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382 | # else |
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383 | return 0 |
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384 | done |
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385 | |
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386 | else |
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387 | pidlist=`pidof -o $$ -o $PPID -x "$1"` |
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388 | if [ "x${silent}" != "x1" ]; then |
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389 | echo "${pidlist}" |
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390 | fi |
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391 | |
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392 | # Get provide correct running status |
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393 | if [ -n "${pidlist}" ]; then |
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394 | return 0 |
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395 | else |
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396 | return 3 |
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397 | fi |
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398 | |
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399 | fi |
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400 | |
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401 | if [ "$?" != "0" ]; then |
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402 | return 3 # Program is not running |
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403 | fi |
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404 | } |
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405 | |
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406 | # This will ensure compatibility with previous LFS Bootscripts |
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407 | getpids() |
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408 | { |
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409 | if [ -z "${PIDFILE}" ]; then |
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410 | pidofproc -s -p "${PIDFILE}" $@ |
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411 | else |
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412 | pidofproc -s $@ |
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413 | fi |
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414 | base="${1##*/}" |
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415 | } |
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416 | |
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417 | #******************************************************************************* |
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418 | # Function - loadproc [-f] [-n nicelevel] [-p pidfile] pathname [args] |
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419 | # |
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420 | # Purpose: This runs the specified program as a daemon |
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421 | # |
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422 | # Inputs: -f, run the program even if it is already running |
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423 | # -n nicelevel, specifies a nice level. See nice(1). |
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424 | # -p pidfile, uses the specified pidfile |
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425 | # pathname, pathname to the specified program |
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426 | # args, arguments to pass to specified program |
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427 | # |
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428 | # Outputs: return 0 - Success |
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429 | # return 2 - Invalid of excessive number of arguments, |
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430 | # warning in stdout |
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431 | # return 4 - Program or service status is unknown |
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432 | # |
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433 | # Dependencies: nice |
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434 | # |
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435 | # Todo: LSB says this should be called start_daemon |
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436 | # LSB does not say that it should call evaluate_retval |
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437 | # It checks for PIDFILE, which is deprecated. |
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438 | # Will be removed after BLFS 6.0 |
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439 | # loadproc returns 0 if program is already running, not LSB compliant |
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440 | # |
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441 | #******************************************************************************* |
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442 | loadproc() |
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443 | { |
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444 | local pidfile="" |
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445 | local forcestart="" |
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446 | local nicelevel="10" |
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447 | |
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448 | # This will ensure compatibility with previous LFS Bootscripts |
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449 | if [ -n "${PIDFILE}" ]; then |
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450 | pidfile="${PIDFILE}" |
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451 | fi |
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452 | |
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453 | while true |
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454 | do |
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455 | case "${1}" in |
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456 | -f) |
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457 | forcestart="1" |
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458 | shift 1 |
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459 | ;; |
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460 | -n) |
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461 | nicelevel="${2}" |
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462 | shift 2 |
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463 | ;; |
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464 | -p) |
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465 | pidfile="${2}" |
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466 | shift 2 |
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467 | ;; |
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468 | -*) |
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469 | log_failure_msg "Unknown Option: ${1}" |
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470 | return 2 #invalid or excess argument(s) |
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471 | ;; |
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472 | *) |
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473 | break |
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474 | ;; |
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475 | esac |
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476 | done |
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477 | |
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478 | if [ "${#}" = "0" ]; then |
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479 | log_failure_msg "Usage: loadproc [-f] [-n nicelevel] [-p pidfile] pathname [args]" |
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480 | return 2 #invalid or excess argument(s) |
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481 | fi |
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482 | |
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483 | if [ -z "${forcestart}" ]; then |
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484 | if [ -z "${pidfile}" ]; then |
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485 | pidofproc -s "${1}" |
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486 | else |
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487 | pidofproc -s -p "${pidfile}" "${1}" |
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488 | fi |
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489 | |
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490 | case "${?}" in |
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491 | 0) |
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492 | log_warning_msg "Unable to continue: ${1} is running" |
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493 | return 0 # 4 |
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494 | ;; |
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495 | 1) |
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496 | log_warning_msg "Unable to continue: ${pidfile} exists" |
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497 | return 0 # 4 |
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498 | ;; |
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499 | 3) |
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500 | ;; |
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501 | *) |
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502 | log_failure_msg "Unknown error code from pidofproc: ${?}" |
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503 | return 4 |
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504 | ;; |
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505 | esac |
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506 | fi |
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507 | |
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508 | nice -n "${nicelevel}" "${@}" |
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509 | evaluate_retval # This is "Probably" not LSB compliant, but required to be compatible with older bootscripts |
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510 | return 0 |
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511 | } |
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512 | |
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513 | #******************************************************************************* |
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514 | # Function - killproc [-p pidfile] pathname [signal] |
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515 | # |
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516 | # Purpose: |
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517 | # |
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518 | # Inputs: -p pidfile, uses the specified pidfile |
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519 | # pathname, pathname to the specified program |
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520 | # signal, send this signal to pathname |
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521 | # |
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522 | # Outputs: return 0 - Success |
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523 | # return 2 - Invalid of excessive number of arguments, |
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524 | # warning in stdout |
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525 | # return 4 - Unknown Status |
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526 | # |
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527 | # Dependencies: kill |
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528 | # |
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529 | # Todo: LSB does not say that it should call evaluate_retval |
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530 | # It checks for PIDFILE, which is deprecated. |
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531 | # Will be removed after BLFS 6.0 |
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532 | # |
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533 | #******************************************************************************* |
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534 | killproc() |
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535 | { |
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536 | local pidfile="" |
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537 | local killsig="" |
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538 | pidlist="" |
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539 | |
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540 | # This will ensure compatibility with previous LFS Bootscripts |
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541 | if [ -n "${PIDFILE}" ]; then |
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542 | pidfile="${PIDFILE}" |
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543 | fi |
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544 | |
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545 | while true |
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546 | do |
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547 | case "${1}" in |
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548 | -p) |
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549 | pidfile="${2}" |
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550 | shift 2 |
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551 | ;; |
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552 | -*) |
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553 | log_failure_msg "Unknown Option: ${1}" |
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554 | return 2 |
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555 | ;; |
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556 | *) |
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557 | break |
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558 | ;; |
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559 | esac |
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560 | done |
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561 | |
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562 | if [ "${#}" = "2" ]; then |
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563 | killsig="${2}" |
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564 | elif [ "${#}" != "1" ]; then |
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565 | shift 2 |
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566 | log_failure_msg "Usage: killproc [-p pidfile] pathname [signal]" |
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567 | return 2 |
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568 | fi |
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569 | |
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570 | if [ -z "${pidfile}" ]; then |
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571 | pidofproc -s "${1}" |
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572 | else |
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573 | pidofproc -s -p "${pidfile}" "${1}" |
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574 | fi |
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575 | |
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576 | # Change.... |
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577 | if [ -n "${pidlist}" ]; then |
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578 | for pid in ${pidlist} |
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579 | do |
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580 | kill -${killsig:-TERM} ${pid} 2>/dev/null |
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581 | if [ -z "${killsig}" ]; then |
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582 | # Wait up to 3 seconds, for ${pid} to terminate |
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583 | local dtime=${KILLDELAY} |
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584 | while [ "${dtime}" != "0" ] |
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585 | do |
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586 | kill -0 ${pid} 2>/dev/null || break |
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587 | sleep 1 |
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588 | dtime=$(( ${dtime} - 1)) |
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589 | done |
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590 | # If ${pid} is still running, kill it |
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591 | kill -0 ${pid} 2>/dev/null && kill -KILL ${pid} 2>/dev/null |
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592 | fi |
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593 | done |
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594 | |
---|
595 | if [ -z "${killsig}" ]; then |
---|
596 | pidofproc -s "${1}" |
---|
597 | |
---|
598 | # Program was terminated |
---|
599 | if [ "$?" != "0" ]; then |
---|
600 | # Pidfile Exists |
---|
601 | if [ -f "${pidfile}" ]; then |
---|
602 | rm -f "${pidfile}" |
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603 | fi |
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604 | echo_ok |
---|
605 | return 0 |
---|
606 | else # Program is still running |
---|
607 | echo_failure |
---|
608 | return 4 # Unknown Status |
---|
609 | fi |
---|
610 | else |
---|
611 | if [ -z "${pidfile}" ]; then |
---|
612 | pidofproc -s "${1}" |
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613 | else |
---|
614 | pidofproc -s -p "${pidfile}" "${1}" |
---|
615 | fi |
---|
616 | fi |
---|
617 | |
---|
618 | evaluate_retval # This is "Probably" not LSB compliant, but required to be compatible with older bootscripts |
---|
619 | |
---|
620 | else |
---|
621 | print_status warning not_running |
---|
622 | fi |
---|
623 | } |
---|
624 | |
---|
625 | |
---|
626 | #******************************************************************************* |
---|
627 | # Function - log_success_msg "message" |
---|
628 | # |
---|
629 | # Purpose: Print a success message |
---|
630 | # |
---|
631 | # Inputs: $@ - Message |
---|
632 | # |
---|
633 | # Outputs: Text output to screen |
---|
634 | # |
---|
635 | # Dependencies: echo |
---|
636 | # |
---|
637 | # Todo: logging |
---|
638 | # |
---|
639 | #******************************************************************************* |
---|
640 | log_success_msg() |
---|
641 | { |
---|
642 | echo -n -e "${BOOTMESG_PREFIX}${@}" |
---|
643 | echo -e "${SET_COL}""${BRACKET}""[""${SUCCESS}"" OK ""${BRACKET}""]""${NORMAL}" |
---|
644 | return 0 |
---|
645 | } |
---|
646 | |
---|
647 | #******************************************************************************* |
---|
648 | # Function - log_failure_msg "message" |
---|
649 | # |
---|
650 | # Purpose: Print a failure message |
---|
651 | # |
---|
652 | # Inputs: $@ - Message |
---|
653 | # |
---|
654 | # Outputs: Text output to screen |
---|
655 | # |
---|
656 | # Dependencies: echo |
---|
657 | # |
---|
658 | # Todo: logging |
---|
659 | # |
---|
660 | #******************************************************************************* |
---|
661 | log_failure_msg() { |
---|
662 | echo -n -e "${BOOTMESG_PREFIX}${@}" |
---|
663 | echo -e "${SET_COL}""${BRACKET}""[""${FAILURE}"" FAIL ""${BRACKET}""]""${NORMAL}" |
---|
664 | return 0 |
---|
665 | } |
---|
666 | |
---|
667 | #******************************************************************************* |
---|
668 | # Function - log_warning_msg "message" |
---|
669 | # |
---|
670 | # Purpose: print a warning message |
---|
671 | # |
---|
672 | # Inputs: $@ - Message |
---|
673 | # |
---|
674 | # Outputs: Text output to screen |
---|
675 | # |
---|
676 | # Dependencies: echo |
---|
677 | # |
---|
678 | # Todo: logging |
---|
679 | # |
---|
680 | #******************************************************************************* |
---|
681 | log_warning_msg() { |
---|
682 | echo -n -e "${BOOTMESG_PREFIX}${@}" |
---|
683 | echo -e "${SET_COL}""${BRACKET}""[""${WARNING}"" WARN ""${BRACKET}""]""${NORMAL}" |
---|
684 | return 0 |
---|
685 | } |
---|
686 | |
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687 | # End $rc_base/init.d/functions |
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