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quick question
- Thread starter hokky
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Hi,
Shell has some built-in variables :
$! PID of the last background command
$? status of execution of last command
$$ PID of the current runnin process
$# number of arguments passed to the running script
$PWD current workin directory
etc...
man sh; man ksh or even what shell you are using for more infos
Shell has some built-in variables :
$! PID of the last background command
$? status of execution of last command
$$ PID of the current runnin process
$# number of arguments passed to the running script
$PWD current workin directory
etc...
man sh; man ksh or even what shell you are using for more infos
The difference between "[tt]wait[/tt]" and "[tt]wait $ps_id[/tt]" is that the "[tt]wait[/tt]" will wait for all subprocesses of this process to end, where the "[tt]wait $ps_id[/tt]" is waiting for a specific process to end, the one who's PID was captured in the variable "[tt]ps_id[/tt]".
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