08-08-2019
This problem has been discussed umpteen times in these fora, e.g.
here.
I'd recommend using
jobs -r to avoid counting non-running jobs; if this
bashism is not available in
ksh, try
jobs| grep -c "running"
Quote:
Originally Posted by
Sangu
...
I tried wait -n ,but it did not work in ksh
What did you expect to accomplish with this? Both
man ksh (
wait [job]) and
man bash (
wait [n]) don't have a minus sign.
This User Gave Thanks to RudiC For This Post:
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WAIT(1) BSD General Commands Manual WAIT(1)
NAME
wait -- await process completion
SYNOPSIS
wait [pid]
DESCRIPTION
If invoked with no arguments, the wait utility waits until all existing child processes in the background have terminated.
Available operands:
pid If a pid operand is specified, and it is the process ID of a background child process that still exists, the wait utility waits until
that process has completed and consumes its status information, without consuming the status information of any other process.
If a pid operand is specified that is not the process ID of a child background process that still exists, wait exits without waiting
for any processes to complete.
The wait utility exits with one of the following values:
0 The wait utility was invoked with no operands and all of the existing background child processes have terminated, or the process
specified by the pid operand exited normally with 0 as its exit status.
>0 The specified process did not exist and its exit status information was not available, or the specified process existed or its exit
status information was available, and it terminated with a non-zero exit status.
If the specified process terminated abnormally due to the receipt of a signal, the exit status information of wait contains that termination
status as well.
STANDARDS
The wait command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
BSD
June 5, 1993 BSD