1 | |
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2 | #******************************************************************************* |
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3 | # Function - start_daemon [-f] [-n nicelevel] [-p pidfile] pathname [args] |
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4 | # |
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5 | # Purpose: This runs the specified program as a daemon |
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6 | # |
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7 | # Inputs: -f, run the program even if it is already running |
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8 | # -n nicelevel, specifies a nice level. See nice(1). |
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9 | # -p pidfile, uses the specified pidfile |
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10 | # pathname, pathname to the specified program |
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11 | # args, arguments to pass to specified program |
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12 | # |
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13 | # Outputs: return 0 - Success |
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14 | # return 2 - Invalid or excessive number of arguments, |
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15 | # warning in stdout |
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16 | # return 4 - Program or service status is unknown |
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17 | # |
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18 | # Dependencies: nice |
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19 | # |
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20 | # Todo: none |
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21 | # |
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22 | #******************************************************************************* |
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23 | start_daemon() |
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24 | { |
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25 | local pidfile="" |
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26 | local forcestart="" |
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27 | local nicelevel="0" |
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28 | |
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29 | while true |
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30 | do |
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31 | case "${1}" in |
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32 | -f) |
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33 | forcestart="1" |
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34 | shift 1 |
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35 | ;; |
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36 | -n) |
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37 | nicelevel="${2}" |
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38 | shift 2 |
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39 | ;; |
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40 | -p) |
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41 | pidfile="${2}" |
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42 | shift 2 |
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43 | ;; |
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44 | -*) |
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45 | log_failure_msg "Unknown Option: ${1}" |
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46 | return 2 |
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47 | ;; |
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48 | *) |
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49 | break |
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50 | ;; |
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51 | esac |
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52 | done |
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53 | |
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54 | if [ -z "${forcestart}" ]; then |
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55 | if [ -z "${pidfile}" ]; then |
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56 | pidofproc "${1}" > /dev/null |
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57 | else |
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58 | pidofproc -p "${pidfile}" "${1}" > /dev/null |
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59 | fi |
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60 | |
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61 | case "${?}" in |
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62 | 0) |
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63 | log_warning_msg "Unable to continue: ${1} is running" |
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64 | return 4 |
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65 | ;; |
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66 | 1) |
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67 | log_warning_msg "Unable to continue: ${pidfile} exists" |
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68 | return 4 |
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69 | ;; |
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70 | 3) |
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71 | ;; |
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72 | *) |
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73 | log_failure_msg "Unknown error code from pidofproc: ${?}" |
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74 | return 4 |
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75 | ;; |
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76 | esac |
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77 | fi |
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78 | |
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79 | nice -n "${nicelevel}" "${@}" |
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80 | } |
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81 | |
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82 | #******************************************************************************* |
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83 | # Function - killproc [-p pidfile] pathname [signal] |
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84 | # |
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85 | # Purpose: |
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86 | # |
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87 | # Inputs: -p pidfile, uses the specified pidfile |
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88 | # pathname, pathname to the specified program |
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89 | # signal, send this signal to pathname |
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90 | # |
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91 | # Outputs: return 0 - Success |
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92 | # return 1 - Invalid or excessive number of arguments, |
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93 | # warning in stdout |
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94 | # return 4 - Unknown Status |
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95 | # |
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96 | # Dependencies: kill |
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97 | # |
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98 | # Todo: test |
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99 | # |
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100 | #******************************************************************************* |
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101 | killproc() |
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102 | { |
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103 | local pidfile="" |
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104 | local killsig="" |
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105 | local pidlist="" |
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106 | while true |
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107 | do |
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108 | case "${1}" in |
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109 | -p) |
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110 | pidfile="${2}" |
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111 | shift 2 |
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112 | ;; |
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113 | -*) |
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114 | log_failure_msg "Unknown Option: ${1}" |
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115 | return 1 |
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116 | ;; |
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117 | *) |
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118 | break |
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119 | ;; |
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120 | esac |
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121 | done |
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122 | |
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123 | if [ "${#}" = "2" ]; then |
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124 | killsig="${2}" |
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125 | elif [ "${#}" != "1" ]; then |
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126 | shift 2 |
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127 | log_failure_msg "Excess Arguments: $@" |
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128 | return 1 |
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129 | fi |
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130 | |
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131 | if [ -z "${pidfile}" ]; then |
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132 | pidlist=`pidofproc "${1}"` |
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133 | else |
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134 | pidlist=`pidofproc -p "${pidfile}" "${1}"` |
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135 | fi |
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136 | |
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137 | for pid in ${pidlist} |
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138 | do |
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139 | kill -${killsig:-TERM} ${pid} 2> /dev/null |
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140 | if [ -z "${killsig}" ]; then |
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141 | # Wait up to 3 seconds, for ${pid} to terminate |
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142 | local dtime=3 |
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143 | while [ "${dtime}" != "0" ] |
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144 | do |
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145 | kill -0 ${pid} 2> /dev/null || break |
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146 | sleep 1 |
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147 | dtime=$(( ${dtime} - 1)) |
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148 | done |
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149 | # If ${pid} is still running, kill it |
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150 | kill -0 ${pid} 2> /dev/null && kill -KILL ${pid} 2> /dev/null |
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151 | fi |
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152 | done |
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153 | |
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154 | if [ -z "${killsig}" ]; then |
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155 | pidofproc "${1}" 2>&1 > /dev/null |
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156 | |
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157 | # Program was terminated |
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158 | if [ "$?" != "0" ]; then |
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159 | # Pidfile Exists |
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160 | if [ -f "${pidfile}" ]; then |
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161 | rm -f "${pidfile}" 2>&1 > /dev/null |
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162 | fi |
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163 | return 0 |
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164 | else # Program is still running |
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165 | return 4 # Unknown Status |
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166 | fi |
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167 | else |
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168 | if [ -z "${pidfile}" ]; then |
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169 | pidofproc "${1}" 2> /dev/null |
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170 | else |
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171 | pidofproc -p "${pidfile}" "${1}" 2> /dev/null |
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172 | fi |
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173 | fi |
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174 | } |
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175 | |
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176 | #******************************************************************************* |
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177 | # Function - pidofproc [-p pidfile] pathname |
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178 | # |
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179 | # Purpose: This function returns one or more pid(s) for a particular daemon |
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180 | # |
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181 | # Inputs: -p pidfile, use the specified pidfile instead of pidof |
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182 | # pathname, path to the specified program |
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183 | # |
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184 | # Outputs: return 0 - Success, pid's in stdout |
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185 | # return 1 - Invalid or excessive number of arguments, |
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186 | # warning in stdout |
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187 | # return 1 - Program is dead, pidfile exists |
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188 | # return 3 - Program is not running |
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189 | # |
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190 | # Dependencies: pidof, echo |
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191 | # |
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192 | # Todo: - Invalid or excessive argments, and program is dead pidfile exists |
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193 | # conflict with eachother |
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194 | # |
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195 | #******************************************************************************* |
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196 | pidofproc() |
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197 | { |
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198 | local pidfile="" |
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199 | local lpids="" |
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200 | local pidlist="" |
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201 | while true |
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202 | do |
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203 | case "${1}" in |
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204 | -p) |
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205 | pidfile="${2}" |
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206 | shift 2 |
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207 | ;; |
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208 | -*) |
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209 | log_failure_msg "Unknown Option: ${1}" |
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210 | return 1 |
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211 | ;; |
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212 | *) |
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213 | break |
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214 | ;; |
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215 | esac |
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216 | done |
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217 | |
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218 | if [ "${#}" != "1" ]; then |
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219 | shift 1 |
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220 | log_failure_msg "Excess Arguments: $@" |
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221 | return 1 |
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222 | fi |
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223 | |
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224 | if [ -n "${pidfile}" ]; then |
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225 | if [ ! -r "${pidfile}" ]; then |
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226 | return 3 # Program is not running |
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227 | fi |
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228 | |
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229 | lpids=`head -n 1 ${pidfile}` |
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230 | for pid in ${lpids} |
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231 | do |
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232 | if [ "${pid}" -ne "$$" -a "${pid}" -ne "${PPID}" ]; then |
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233 | kill -0 "${pid}" 2> /dev/null && |
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234 | pidlist="${pidlist} ${pid}" |
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235 | fi |
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236 | echo ${pidlist} |
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237 | test -z "${pidlist}" && return 1 # Program is dead, pidfile exists |
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238 | return 0 |
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239 | done |
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240 | |
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241 | else |
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242 | pidof "${1}" |
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243 | fi |
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244 | |
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245 | if [ "$?" != "0" ]; then |
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246 | return 3 # Program is not running |
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247 | fi |
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248 | } |
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249 | |
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250 | # Screen Dimentions |
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251 | if [ -z "${COLUMNS}" ]; then |
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252 | COLUMNS=$(stty size) |
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253 | COLUMNS=${COLUMNS##* } |
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254 | fi |
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255 | |
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256 | # When using remote connections, such as a serial port, stty size returns 0 |
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257 | if [ "${COLUMNS}" = "0" ]; then |
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258 | COLUMNS=80 |
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259 | fi |
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260 | |
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261 | # Measurements for positioning result messages |
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262 | COL=$((${COLUMNS} - 8)) |
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263 | WCOL=$((${COL} - 2)) |
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264 | |
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265 | # Set Cursur Position Commands, used via echo -e |
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266 | SET_COL="\\033[${COL}G" # at the $COL char |
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267 | SET_WCOL="\\033[${WCOL}G" # at the $WCOL char |
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268 | CURS_UP="\\033[1A\\033[0G" # Up one line, at the 0'th char |
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269 | |
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270 | # Set color commands, used via echo -e |
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271 | # Please consult `man console_codes` for more information |
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272 | # under the "Set Graphics Resolution" section |
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273 | # |
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274 | # Warning, when switching from a 8bit to a 9bit font, |
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275 | # the linux console will reinterpret the bold (1;) to |
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276 | # the top 256 glyphs of the 9bit font. This does |
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277 | # not affect framebuffer consoles |
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278 | NORMAL="\\033[0;39m" # Standard console grey |
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279 | SUCCESS="\\033[1;32m" # Success is green |
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280 | WARNING="\\033[1;33m" # Warnings are yellow |
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281 | FAILURE="\\033[1;31m" # Failures are red |
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282 | INFO="\\033[1;36m" # Information is light cyan |
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283 | BRACKET="\\033[1;34m" # Brackets are blue |
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284 | |
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285 | BOOTMESG_PREFIX=" * " # Text at the beginning of every line |
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286 | |
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287 | |
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288 | #******************************************************************************* |
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289 | # Function - log_success_msg "message" |
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290 | # |
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291 | # Purpose: Print a success message |
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292 | # |
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293 | # Inputs: |
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294 | # |
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295 | # Outputs: |
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296 | # |
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297 | # Dependencies: echo |
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298 | # |
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299 | # Todo: logging |
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300 | # |
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301 | #******************************************************************************* |
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302 | log_success_msg() |
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303 | { |
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304 | echo -n -e "${BOOTMESG_PREFIX}${@}" |
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305 | echo -e "${SET_COL}""${BRACKET}""[""${SUCCESS}"" OK ""${BRACKET}""]""${NORMAL}" |
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306 | return 0 |
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307 | } |
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308 | |
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309 | #******************************************************************************* |
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310 | # Function - log_failure_msg "message" |
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311 | # |
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312 | # Purpose: Print a failure message |
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313 | # |
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314 | # Inputs: $@ - Message |
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315 | # |
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316 | # Outputs: Text output to screen |
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317 | # |
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318 | # Dependencies: echo |
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319 | # |
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320 | # Todo: logging |
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321 | # |
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322 | #******************************************************************************* |
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323 | log_failure_msg() { |
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324 | echo -n -e "${BOOTMESG_PREFIX}${@}" |
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325 | echo -e "${SET_COL}""${BRACKET}""[""${FAILURE}"" FAIL ""${BRACKET}""]""${NORMAL}" |
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326 | return 0 |
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327 | } |
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328 | |
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329 | #******************************************************************************* |
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330 | # Function - log_warning_msg "message" |
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331 | # |
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332 | # Purpose: print a warning message |
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333 | # |
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334 | # Inputs: $@ - Message |
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335 | # |
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336 | # Outputs: Text output to screen |
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337 | # |
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338 | # Dependencies: echo |
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339 | # |
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340 | # Todo: logging |
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341 | # |
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342 | #******************************************************************************* |
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343 | log_warning_msg() { |
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344 | echo -n -e "${BOOTMESG_PREFIX}${@}" |
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345 | echo -e "${SET_COL}""${BRACKET}""[""${WARNING}"" WARN ""${BRACKET}""]""${NORMAL}" |
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346 | return 0 |
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347 | } |
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348 | |
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