56 lines
1.2 KiB
Bash
56 lines
1.2 KiB
Bash
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#!/bin/sh
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## Redirecting Filehanders
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ln -sf /proc/$$/fd/1 /log/stdout.log
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ln -sf /proc/$$/fd/2 /log/stderr.log
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## Pre execution handler
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pre_execution_handler() {
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## Pre Execution
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# TODO: put your pre execution steps here
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: # delete this nop
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}
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## Post execution handler
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post_execution_handler() {
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## Post Execution
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# TODO: put your post execution steps here
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: # delete this nop
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}
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## Sigterm Handler
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sigterm_handler() {
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if [ $pid -ne 0 ]; then
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# the above if statement is important because it ensures
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# that the application has already started. without it you
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# could attempt cleanup steps if the application failed to
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# start, causing errors.
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kill -15 "$pid"
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wait "$pid"
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post_execution_handler
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fi
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exit 143 # 128 + 15 -- SIGTERM
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}
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## Setup signal trap
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# on callback execute the specified handler
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trap 'sigterm_handler' SIGTERM
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## Initialization
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pre_execution_handler
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## Start Process
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# run process in background and record PID
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"$@" >/log/stdout.log 2>/log/stderr.log &
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pid="$!"
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# Application can log to stdout/stderr, /log/stdout.log or /log/stderr.log
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## Wait forever until app dies
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wait "$pid"
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return_code="$?"
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## Cleanup
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post_execution_handler
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# echo the return code of the application
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exit $return_code
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