shell脚本设置command的timeout

[myccc456]

一个shell脚本中， 有些command需要设置timeout，请问怎么办呢？

[Coder_Granger]

安装timeout这个工具，
Debian/Ubuntu可以

sudo apt-get install timeout

timeout用法如下

TIMEOUT(1)                                                         TIMEOUT(1)

NAME
       timeout - run command with bounded time

SYNOPSIS
       timeout [-signal] time command ...

DESCRIPTION
       timeout  executes  a  command  and imposes an elapsed time limit.  The
       command is run in a separate POSIX process group  so  that  the  right
       thing happens with commands that spawn child processes.

       Arguments:

       -signal
              Specify  an  optional signal to send to the controlled process.
              By default, timeout sends SIGKILL, which cannot  be  caught  or
              ignored. The signal must be provided in its numerical value.

       time   The  elapsed  time  limit in seconds after which the command is
              terminated.

       command
              The command to be executed.

DIAGNOSTICS
       timeout's exit status is the exit status of the specified command or 1
       in case of a usage error.

LICENSE
       The IBM PUBLIC LICENSE must be distributed with this
       software.

HISTORY
       This program was first released as part of SATAN.

AUTHOR(S)
       Wietse Venema

                                                                   TIMEOUT(1)

[masmaster]

如果用bash， 可以用他的read -t sec，也可以用stty来实现。
shell的内部变量TMOUT只能限定在命令行下即交互模式

[shnsunday]

3小时0分钟以前Ambar Ray

[steptodream]

1楼说的那个工具还没用过
什么时候试试 嘿嘿

[louyong0571]

这个，没想法。。

[myccc456]

十分感谢1楼，但是如果服务器很多的话，每个都需要装这个工具的话，也不大现实。
不知道为何unix默认不提供这个命令，perl是可以的。

[ljc007]

./test.sh & { sleep ${TIMEOUT}; eval 'kill -9 $!' &> /dev/null; }