如何重試bash命令，直到其狀態爲好或達到超時？重試超時Bash命令
我最好的拍攝（我在尋找簡單的東西）：
NEXT_WAIT_TIME=0
COMMAND_STATUS=1
until [ $COMMAND_STATUS -eq 0 || $NEXT_WAIT_TIME -eq 4 ]; do
command
COMMAND_STATUS=$?
sleep $NEXT_WAIT_TIME
let NEXT_WAIT_TIME=NEXT_WAIT_TIME+1
done
您可以通過將command就在測試和做事情簡單化有點不同遞增位。否則腳本看起來很好：
NEXT_WAIT_TIME=0
until command || [ $NEXT_WAIT_TIME -eq 4 ]; do
sleep $((NEXT_WAIT_TIME++))
done
至少在bash版本4.1.5中，您需要將睡眠行更改爲 sleep $（（NEXT_WAIT_TIME ++）） – Nightscape
謝謝，修復了答案。 –
好的解決方案，唯一的問題是最後一個「命令」失敗後，你仍然需要睡4秒。不確定這是否可以避免，並保持代碼緊湊。 – David
把一些工具放在一起。
重試：https://github.com/kadwanev/retry
超時：http://manpages.courier-mta.org/htmlman1/timeout.1.html
然後看到最終通魔
retry timeout 3 ping google.com
PING google.com (173.194.123.97): 56 data bytes
64 bytes from 173.194.123.97: icmp_seq=0 ttl=55 time=13.982 ms
64 bytes from 173.194.123.97: icmp_seq=1 ttl=55 time=44.857 ms
64 bytes from 173.194.123.97: icmp_seq=2 ttl=55 time=64.187 ms
Before retry #1: sleeping 0.3 seconds
PING google.com (173.194.123.103): 56 data bytes
64 bytes from 173.194.123.103: icmp_seq=0 ttl=55 time=56.549 ms
64 bytes from 173.194.123.103: icmp_seq=1 ttl=55 time=60.220 ms
64 bytes from 173.194.123.103: icmp_seq=2 ttl=55 time=8.872 ms
Before retry #2: sleeping 0.6 seconds
PING google.com (173.194.123.103): 56 data bytes
64 bytes from 173.194.123.103: icmp_seq=0 ttl=55 time=25.819 ms
64 bytes from 173.194.123.103: icmp_seq=1 ttl=55 time=16.382 ms
64 bytes from 173.194.123.103: icmp_seq=2 ttl=55 time=3.224 ms
Before retry #3: sleeping 1.2 seconds
PING google.com (173.194.123.103): 56 data bytes
64 bytes from 173.194.123.103: icmp_seq=0 ttl=55 time=58.438 ms
64 bytes from 173.194.123.103: icmp_seq=1 ttl=55 time=94.828 ms
64 bytes from 173.194.123.103: icmp_seq=2 ttl=55 time=61.075 ms
Before retry #4: sleeping 2.4 seconds
PING google.com (173.194.123.103): 56 data bytes
64 bytes from 173.194.123.103: icmp_seq=0 ttl=55 time=43.361 ms
64 bytes from 173.194.123.103: icmp_seq=1 ttl=55 time=32.171 ms
...
檢查退出狀態/失敗。
管理單元：https：//github.com/sky-shiny/retrycli – J0hnG4lt
#!/bin/bash
# Retries a command on failure.
# $1 - the max number of attempts
# $2... - the command to run
retry() {
local -r -i max_attempts="$1"; shift
local -r cmd="[email protected]"
local -i attempt_num=1
until $cmd
do
if ((attempt_num == max_attempts))
then
echo "Attempt $attempt_num failed and there are no more attempts left!"
return 1
else
echo "Attempt $attempt_num failed! Trying again in $attempt_num seconds..."
sleep $((attempt_num++))
fi
done
}
# example usage:
retry 5 ls -ltr foo
# example usage:
foo()
{
#whatever you want do.
}
declare -fxr foo
retry 3 timeout 60 bash -ce 'foo'
你不想把'$？'的權利放在測試語句中 - 我認爲這是一個錯字，你真的想要'$ COMMAND_STATUS'嗎？ –
@Grisha Levit：你說得對，我更新了這個問題 –
這個表格有一個好處，那就是$ COMMAND_STATUS在執行後可用。 – AnneTheAgile