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alexfvolk's questions

Martin Hope
alexfvolk
Asked: 2020-01-18 13:47:11 +0800 CST
  • 2

这对我来说是莫名其妙的行为。我在 aws s3 sync 命令运行时向我的脚本发送终止信号，尽管我处理了 sigterm 错误，但错误陷阱也由 aws sync 命令触发，我不明白为什么。更令人困惑的是，该命令会引发错误并继续：

脚本：

#! /bin/bash

trap 'echo GOT ERROR, exiting' ERR
trap 'echo GOT SIGTERM!' SIGTERM
while true; do
    date +%F_%T
    aws s3 cp /vagrant/audio/ s3://testarchive/tester/ --recursive
    sleep 1
done

运行脚本的命令：

timeout 5s ./tester.sh

输出：

upload: ../../vagrant/audio/2019-09-16/3/35322118-8264-406B-961B-EAF1FE7A34EF.wav to s3://testarchive/tester/2019-09-16/3/35322118-8264-406B-961B-EAF1FE7A34EF.wav
upload: ../../vagrant/audio/2019-09-16/1/165BD3D0-773A-4591-A43E-D67810716066.wav to s3://testarchive/tester/2019-09-16/1/165BD3D0-773A-4591-A43E-D67810716066.wav
upload: ../../vagrant/audio/2019-09-16/2/2A9559BB-168A-47D2-943A-A51B7885233B.wav to s3://testarchive/tester/2019-09-16/2/2A9559BB-168A-47D2-943A-A51B7885233B.wav
Terminated6.8 MiB/123.1 MiB (1.5 MiB/s) with 422 file(s) remaining
GOT ERROR, exiting
GOT SIGTERM!
2020-01-17_21:05:40
upload: ../../vagrant/audio/2019-09-16/0/07502A17-9304-4995-94E1-A1B0D439EEE7.wav to s3://testarchive/tester/2019-09-16/0/07502A17-9304-4995-94E1-A1B0D439EEE7.wav
upload: ../../vagrant/audio/2019-09-16/0/05E4C765-C2FA-4EC0-9803-8FF02C0FEDDE.wav to s3://testarchive/tester/2019-09-16/0/05E4C765-C2FA-4EC0-9803-8FF02C0FEDDE.wav
upload: ../../vagrant/audio/2019-09-

编辑＃2：

29   1   *   *   *   root   strace -e trace=kill timeout --foreground 6 /home/vagrant/tester.sh &> /home/vagrant/tester.log

#! /bin/bash

trap 'echo GOT ERROR..' ERR
trap 'echo GOT SIGTERM! && set_terminate_flag' SIGTERM

terminate_flag=false

function set_terminate_flag {
  terminate_flag=true
}

while true; do
  if [ "$terminate_flag" = true ]; then
    echo OMG IT WORKS!
    exit 0
  fi
  date +%F_%T
  aws s3 cp /vagrant/audio/ s3://testarchive/tester/ --recursive
  echo LOOP IS Done, begin sleep
done

输出：

...(skip output, 6 seconds have passed!!!)
--- SIGALRM {si_signo=SIGALRM, si_code=SI_TIMER, si_timerid=0, si_overrun=0, si_value={int=14831664, ptr=0xe25030}} ---
kill(9432, SIGTERM)                     = 0
kill(9432, SIGCONT)                     = 0
...(skip output)
upload: ../vagrant/audio/2020-01-01/E7914F83-8A89-4679-ABBC-8DB261D13349-01.wav to s3://testarchive/tester/2020-01-01/E7914F83-8A89-4679-ABBC-8DB261D13349-01.wav
GOT SIGTERM!
LOOP IS Done, begin sleep
OMG IT WORKS!
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=9432, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
+++ exited with 124 +++
shell-script aws