1 | # Begin /lib/lsb/init-funtions
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2 |
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3 | # Provides initialization funtions as defined by the Linux Standard Base
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4 | # specification, version 3.1.0
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5 |
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6 | # Source rc configuration if not inherited from the environment
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7 | if [ "${RC_BASE}" = "" ]; then
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8 | . /etc/sysconfig/rc
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9 | fi
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10 |
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11 | # Source the distro functions file
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12 | if [ "${DISTRO_MINI}" != "" ]; then
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13 | . "${RC_BASE}/init.d/${DISTRO_MINI}-functions"
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14 | fi
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15 |
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16 | ################################################################################
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17 | # start_daemon() #
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18 | # Usage: start_daemon [-f] [-n nicelevel] [-p pidfile] pathname [args...] #
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19 | # #
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20 | # Purpose: This runs the specified program as a daemon #
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21 | # #
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22 | # Inputs: -f: (force) run the program even if it is already running. #
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23 | # -n nicelevel: specify a nice level. See 'man nice(1)'. #
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24 | # -p pidfile: use the specified file to determine PIDs. #
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25 | # pathname: the complete path to the specified program #
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26 | # args: additional arguments passed to the program (pathname) #
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27 | # #
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28 | # Return values (as defined by LSB exit codes): #
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29 | # 0 - program is running or service is OK #
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30 | # 1 - generic or unspecified error #
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31 | # 2 - invalid or excessive argument(s) #
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32 | # 5 - program is not installed #
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33 | ################################################################################
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34 | start_daemon()
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35 | {
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36 | local force=""
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37 | local nice="0"
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38 | local pidfile=""
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39 | local pidlist=""
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40 | local retval=""
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41 |
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42 | # Process arguments
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43 | while true
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44 | do
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45 | case "${1}" in
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46 |
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47 | -f)
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48 | force="1"
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49 | shift 1
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50 | ;;
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51 |
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52 | -n)
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53 | nice="${2}"
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54 | shift 2
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55 | ;;
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56 |
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57 | -p)
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58 | pidfile="${2}"
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59 | shift 2
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60 | ;;
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61 |
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62 | -*)
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63 | return 2
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64 | ;;
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65 |
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66 | *)
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67 | program="${1}"
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68 | break
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69 | ;;
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70 | esac
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71 | done
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72 |
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73 | # Check for a valid program
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74 | if [ ! -e "${program}" ]
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75 | then
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76 | return 5
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77 | fi
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78 |
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79 | # Execute
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80 | if [ -z "${force}" ]
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81 | then
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82 | if [ -z "${pidfile}" ]
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83 | then
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84 | # determine the pid by discovery
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85 | pidlist=`pidofproc "${1}"`
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86 | retval="${?}"
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87 | else
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88 | # The PID file contains the needed PIDs
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89 | # Note that by LSB requirement, the path must be given to pidofproc,
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90 | # however, it is not used by the current implementation or standard.
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91 | pidlist=`pidofproc -p "${pidfile}" "${1}"`
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92 | retval="${?}"
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93 | fi
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94 |
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95 | # return a value ONLY
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96 | # It is the init script's (or distribution's functions) responsibilty
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97 | # to log messages!
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98 | case "${retval}" in
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99 |
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100 | 0)
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101 | # program is already running correctly, this is a
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102 | # succesful start.
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103 | return 0
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104 | ;;
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105 |
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106 | 1)
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107 | # program is not running, but an invalid pid file exists
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108 | # remove the pid file and continue
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109 | rm -f "${pidfile}"
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110 | ;;
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111 |
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112 | 3)
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113 | # program is not running and no pidfile exists
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114 | # do nothing here, let start_deamon continue.
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115 | ;;
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116 |
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117 | *)
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118 | # Others as returned by status values shall not be interpreted
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119 | # and returned as an unspecified error.
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120 | return 1
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121 | ;;
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122 | esac
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123 | fi
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124 |
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125 | # do the start!
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126 | nice -n "${nice}" "${@}"
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127 |
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128 | }
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129 |
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130 | ################################################################################
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131 | # killproc() #
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132 | # Usage: killproc [-p pidfile] pathname [signal] #
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133 | # #
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134 | # Purpose: Send control signals to running processes #
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135 | # #
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136 | # Inputs: -p pidfile, uses the specified pidfile #
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137 | # pathname, pathname to the specified program #
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138 | # signal, send this signal to pathname #
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139 | # #
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140 | # Return values (as defined by LSB exit codes): #
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141 | # 0 - program (pathname) has stopped/is already stopped or a #
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142 | # running program has been sent specified signal and stopped #
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143 | # successfully #
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144 | # 1 - generic or unspecified error #
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145 | # 2 - invalid or excessive argument(s) #
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146 | # 5 - program is not installed #
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147 | # 7 - program is not running and a signal was supplied #
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148 | ################################################################################
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149 | killproc()
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150 | {
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151 | local pidfile
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152 | local program
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153 | local prefix
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154 | local progname
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155 | local signal="-TERM"
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156 | local fallback="-KILL"
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157 | local nosig
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158 | local pidlist
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159 | local retval
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160 | local pid
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161 | local delay="30"
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162 | local piddead
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163 | local dtime
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164 |
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165 | # Process arguments
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166 | while true
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167 | do
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168 | case "${1}" in
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169 |
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170 | -p)
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171 | pidfile="${2}"
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172 | shift 2
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173 | ;;
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174 |
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175 | *)
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176 | program="${1}"
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177 | if [ -n "${2}" ]
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178 | then
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179 | signal="${2}"
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180 | fallback=""
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181 | else
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182 | nosig=1
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183 | fi
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184 |
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185 | # error on additional arguments
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186 | if [ -n "${3}" ]
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187 | then
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188 | return 2
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189 | else
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190 | break
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191 | fi
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192 | ;;
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193 | esac
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194 | done
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195 |
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196 | # Check for a valid program
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197 | if [ ! -e "${program}" ]
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198 | then
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199 | return 5
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200 | fi
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201 |
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202 | # Check for a valid signal
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203 | check_signal "${signal}"
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204 | if [ "${?}" != "0" ]
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205 | then
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206 | return 2
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207 | fi
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208 |
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209 | # Get a list of pids
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210 | if [ -z "${pidfile}" ]
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211 | then
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212 | # determine the pid by discovery
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213 | pidlist=`pidofproc "${1}"`
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214 | retval="${?}"
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215 | else
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216 | # The PID file contains the needed PIDs
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217 | # Note that by LSB requirement, the path must be given to pidofproc,
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218 | # however, it is not used by the current implementation or standard.
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219 | pidlist=`pidofproc -p "${pidfile}" "${1}"`
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220 | retval="${?}"
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221 | fi
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222 |
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223 | # return a value ONLY
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224 | # It is the init script's (or distribution's functions) responsibilty
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225 | # to log messages!
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226 | case "${retval}" in
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227 |
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228 | 0)
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229 | # program is running correctly
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230 | # do nothing here, let killproc continue.
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231 | ;;
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232 |
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233 | 1)
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234 | # program is not running, but an invalid pid file exists
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235 | # remove the pid file.
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236 | rm -f "${pidfile}"
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237 | # this is only a success if no signal was passed.
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238 | if [ -n "${nosig}" ]
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239 | then
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240 | return 0
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241 | else
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242 | return 7
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243 | fi
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244 | ;;
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245 |
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246 | 3)
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247 | # program is not running and no pidfile exists
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248 | # this is only a success if no signal was passed.
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249 | if [ -n "${nosig}" ]
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250 | then
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251 | return 0
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252 | else
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253 | return 7
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254 | fi
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255 | ;;
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256 |
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257 | *)
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258 | # Others as returned by status values shall not be interpreted
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259 | # and returned as an unspecified error.
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260 | return 1
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261 | ;;
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262 | esac
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263 |
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264 | # perform different actions for exit signals and control signals
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265 | check_sig_type "${signal}"
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266 | if [ "${?}" -eq "0" ] # signal is used to terminate the program
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267 | then
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268 | # account for empty pidlist (pid file still exists and nosignal was given)
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269 | if [ "${pidlist}" != "" ]; then
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270 | #kill the list of pids
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271 | for pid in ${pidlist}
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272 | do
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273 | kill -0 "${pid}" 2> /dev/null
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274 | if [ "${?}" -ne "0" ]; then
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275 | # process is dead, continue to next and assume all is well
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276 | continue
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277 | else
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278 | kill "${signal}" "${pid}" 2> /dev/null
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279 | # Wait up to ${delay}/10 seconds to for "${pid}" to
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280 | # terminate in 10ths of a second
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281 | while [ "${delay}" != "0" ]
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282 | do
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283 | kill -0 "${pid}" 2> /dev/null || piddead="1"
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284 | if [ "${piddead}" = "1" ]
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285 | then
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286 | break
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287 | fi
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288 | sleep 0.1
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289 | delay="$(( ${delay} - 1 ))"
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290 | done
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291 | # If a fallback is set, and program is still running, then
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292 | # use the fallback
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293 | if [ -n "${fallback}" -a "${piddead}" != "1" ]
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294 | then
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295 | kill "${fallback}" "${pid}" 2> /dev/null
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296 | sleep 1
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297 | # Check again, and fail if still running
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298 | kill -0 "${pid}" 2> /dev/null && return 1
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299 | else
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300 | # just check one last time and if still alive, fail
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301 | sleep 1
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302 | kill -0 "${pid}" 2> /dev/null && return 1
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303 | fi
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304 | fi
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305 | done
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306 | fi
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307 |
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308 | # Check for and remove stale PID files.
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309 | if [ -z "${pidfile}" ]
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310 | then
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311 | #find the basename of $program
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312 | prefix=`echo "${program}" | sed 's/[^/]*$//'`
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313 | progname=`echo "${program}" | sed "s@${prefix}@@"`
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314 | if [ -e "/var/run/${progname}.pid" ]
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315 | then
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316 | rm -f "/var/run/${progname}.pid" 2> /dev/null
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317 | fi
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318 | else
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319 | if [ -e "${pidfile}" ]
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320 | then
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321 | rm -f "${pidfile}" 2> /dev/null
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322 | fi
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323 | fi
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324 |
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325 | # For signals that do not expect a program to exit, simply
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326 | # let kill do it's job, and evaluate kills return for value
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327 | else # check_sig_type - signal is not used to terminate program
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328 | for pid in ${pidlist}
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329 | do
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330 | kill "${signal}" "${pid}"
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331 | if [ "${?}" -ne "0" ]; then
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332 | return 1
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333 | fi
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334 | done
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335 | fi
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336 | }
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337 |
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338 | ################################################################################
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339 | # pidofproc() #
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340 | # Usage: pidofproc [-p pidfile] pathname #
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341 | # #
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342 | # Purpose: This function returns one or more pid(s) for a particular daemon #
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343 | # #
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344 | # Inputs: -p pidfile, use the specified pidfile instead of pidof #
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345 | # pathname, path to the specified program #
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346 | # #
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347 | # Return values (as defined by LSB status codes): #
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348 | # 0 - Success (PIDs to stdout) #
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349 | # 1 - Program is dead, PID file still exists (remaining PIDs output) #
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350 | # 3 - Program is not running (no output) #
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351 | ################################################################################
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352 | pidofproc()
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353 | {
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354 |
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355 | local pidfile
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356 | local program
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357 | local prefix
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358 | local progname
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359 | local pidlist
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360 | local lpids
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361 | local exitstatus="0"
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362 |
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363 | # Process arguments
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364 | while true
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365 | do
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366 | case "${1}" in
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367 |
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368 | -p)
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369 | pidfile="${2}"
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370 | shift 2
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371 | ;;
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372 |
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373 | *)
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374 | program="${1}"
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375 | if [ -n "${2}" ]
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376 | then
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377 | # Too many arguments
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378 | # Since this is status, return unknown
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379 | return 4
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380 | else
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381 | break
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382 | fi
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383 | ;;
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384 | esac
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385 | done
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386 |
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387 | # If a PID file is not specified, try and find one.
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388 | if [ -z "${pidfile}" ]
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389 | then
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390 | # get the program's basename
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391 | prefix=`echo "${program}" | sed 's/[^/]*$//'`
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392 | progname=`echo "${program}" | sed "s@${prefix}@@"`
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393 | # if a PID file exists with that name, assume that is it.
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394 | if [ -e "/var/run/${progname}.pid" ]
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395 | then
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396 | pidfile="/var/run/${progname}.pid"
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397 | fi
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398 | fi
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399 |
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400 | # if a PID file is set and exists, use it.
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401 | if [ -n "${pidfile}" -a -e "${pidfile}" ]
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402 | then
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403 | # use the value in the first line of the pidfile
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404 | pidlist=`/bin/head -n1 "${pidfile}"`
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405 | # This can optionally be written as 'sed 1q' to repalce 'head -n1'
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406 | # should LFS move /bin/head to /usr/bin/head
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407 | else
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408 | # use pidof
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409 | pidlist=`pidof "${program}"`
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410 | fi
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411 |
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412 | # Figure out if all listed PIDs are running.
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413 | for pid in ${pidlist}
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414 | do
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415 | kill -0 ${pid} 2> /dev/null
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416 | if [ "${?}" = "0" ]; then
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417 | lpids="${pids}${pid} "
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418 | else
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419 | exitstatus="1"
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420 | fi
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421 | done
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422 |
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423 | if [ -z "${lpids}" -a ! -f "${pidfile}" ]; then
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424 | return 3
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425 | else
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426 | echo "${lpids}"
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427 | return "${exitstatus}"
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428 | fi
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429 | }
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430 | ################################################################################
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431 | # log_success_msg() #
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432 | # Usage: log_success_msg [$MESSAGE | "message"] #
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433 | # #
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434 | # Purpose: Print a successful status message to the screen and optionally #
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435 | # a boot log file. #
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436 | # #
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437 | # Inputs: accepts one string value, either a quoted string or optionally #
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438 | # the value of $MESSAGE if set in the running environment. #
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439 | # #
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440 | # Return values: Not used #
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441 | ################################################################################
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442 | log_success_msg()
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443 | {
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444 | echo -n -e "${PREFIX_SUCCESS}${@}"
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445 | echo -e "${SET_COL}${BRACKET}[${SUCCESS} OK ${BRACKET}]${NORMAL}"
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446 | if [ "${BOOTLOG_ENAB}" = "yes" ]; then
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447 | if [ $( hostname ) = "(none)" ]; then
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448 | BTTIMESPEC=""
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449 | else
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450 | BTTIMESPEC="$(echo `date +"%b %d %T"` `hostname`) "
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451 | fi
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452 | echo "${BTTIMESPEC}bootlog: ${@} Successful" >> "${TEMPFS_MOUNT}/.bootlog"
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453 | fi
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454 | return 0
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455 | }
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456 |
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457 | ################################################################################
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458 | # log_failure_msg() #
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459 | # Usage: log_failure_msg [$MESSAGE | "message"] #
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460 | # #
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461 | # Purpose: Print a failure status message to the screen and optionally #
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462 | # a boot log file. #
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463 | # #
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464 | # Inputs: accepts one string value, either a quoted string or optionally #
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465 | # the value of $MESSAGE if set in the running environment. #
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466 | # #
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467 | # Return values: Not used #
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468 | ################################################################################
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469 | log_failure_msg()
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470 | {
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471 | echo -n -e "${PREFIX_FAILURE}${@}"
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472 | echo -e "${SET_COL}${BRACKET}[${FAILURE} FAIL ${BRACKET}]${NORMAL}"
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473 | if [ "${BOOTLOG_ENAB}" = "yes" ]; then
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474 | if [ $( hostname ) = "(none)" ]; then
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475 | BTTIMESPEC=""
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476 | else
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477 | BTTIMESPEC="$(echo `date +"%b %d %T"` `hostname`) "
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478 | fi
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479 | echo "${BTTIMESPEC}bootlog: ${@} Failed!" >> "${TEMPFS_MOUNT}/.bootlog"
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480 | fi
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481 | return 0
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482 | }
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483 |
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484 | ################################################################################
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485 | # log_warning_msg() #
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486 | # Usage: log_warning_msg [$MESSAGE | "message"] #
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487 | # #
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488 | # Purpose: Print a warning status message to the screen and optionally #
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489 | # a boot log file. #
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490 | # #
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491 | # Inputs: accepts one string value, either a quoted string or optionally #
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492 | # the value of $MESSAGE if set in the running environment. #
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493 | # #
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494 | # Return values: Not used #
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495 | ################################################################################
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496 | log_warning_msg()
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497 | {
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498 | echo -n -e "${PREFIX_WARNING}${@}"
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499 | echo -e "${SET_COL}${BRACKET}[${WARNING} WARN ${BRACKET}]${NORMAL}"
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500 | if [ "${BOOTLOG_ENAB}" = "yes" ]; then
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501 | if [ $( hostname ) = "(none)" ]; then
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502 | BTTIMESPEC=""
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503 | else
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504 | BTTIMESPEC="$(echo `date +"%b %d %T"` `hostname`) "
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505 | fi
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506 | echo "${BTTIMESPEC}bootlog: ${@} Warning" >> "${TEMPFS_MOUNT}/.bootlog"
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507 | fi
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508 | return 0
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509 | }
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510 |
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511 | ################################################################################
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512 | # check_signal() #
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513 | # Usage: check_signal [ -{signal} | {signal} ] #
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514 | # #
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515 | # Purpose: Check for a valid signal. This is not defined by any LSB draft, #
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516 | # however, it is required to check the signals to determine if the #
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517 | # signals chosen are invalid arguments to the other functions. #
|
---|
518 | # #
|
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519 | # Inputs: accepts a single string value in the form or -{signal} or {signal} #
|
---|
520 | # #
|
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521 | # Return values: #
|
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522 | # 0 - Success (signal is valid #
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523 | # 1 - Signal is not valid #
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524 | ################################################################################
|
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525 | check_signal()
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---|
526 | {
|
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527 | local valsig
|
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528 |
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529 | # Add error handling for invalid signals
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530 | valsig="-ALRM -HUP -INT -KILL -PIPE -POLL -PROF -TERM -USR1 -USR2"
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531 | valsig="${valsig} -VTALRM -STKFLT -PWR -WINCH -CHLD -URG -TSTP -TTIN"
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532 | valsig="${valsig} -TTOU -STOP -CONT -ABRT -FPE -ILL -QUIT -SEGV -TRAP"
|
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533 | valsig="${valsig} -SYS -EMT -BUS -XCPU -XFSZ -0 -1 -2 -3 -4 -5 -6 -8 -9"
|
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534 | valsig="${valsig} -11 -13 -14 -15"
|
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535 |
|
---|
536 | echo "${valsig}" | grep -- " ${1} " > /dev/null
|
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537 | if [ "${?}" = "0" ]
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538 | then
|
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539 | return 0
|
---|
540 | else
|
---|
541 | return 1
|
---|
542 | fi
|
---|
543 | }
|
---|
544 |
|
---|
545 |
|
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546 | ################################################################################
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547 | # check_sig_type() #
|
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548 | # Usage: check_signal [ -{signal} | {signal} ] #
|
---|
549 | # #
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550 | # Purpose: Check if signal is a program termination signal or a control signal #
|
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551 | # This is not defined by any LSB draft, however, it is required to #
|
---|
552 | # check the signals to determine if they are intended to end a #
|
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553 | # program or simply to control it. #
|
---|
554 | # #
|
---|
555 | # Inputs: accepts a single string value in the form or -{signal} or {signal} #
|
---|
556 | # #
|
---|
557 | # Return values: #
|
---|
558 | # 0 - Signal is used for program termination #
|
---|
559 | # 1 - Signal is used for program control #
|
---|
560 | ################################################################################
|
---|
561 | check_sig_type()
|
---|
562 | {
|
---|
563 | local valsig
|
---|
564 |
|
---|
565 | # The list of termination signals (limited to generally used items)
|
---|
566 | valsig="-ALRM -INT -KILL -TERM -PWR -STOP -ABRT -QUIT -2 -3 -6 -9 -14 -15"
|
---|
567 |
|
---|
568 | echo "${valsig}" | grep -- " ${1} " > /dev/null
|
---|
569 | if [ "${?}" = "0" ]
|
---|
570 | then
|
---|
571 | return 0
|
---|
572 | else
|
---|
573 | return 1
|
---|
574 | fi
|
---|
575 | }
|
---|
576 |
|
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577 | # End /lib/lsb/init-functions
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