| 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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