I have a need to run any number of identical scripts simultaneously, so I've created a driver script which reads a template script, edits these appropriately and then submits them via nohup. The spawned scripts all check to see at some point how many of their number are running and once the count has dropped to 2 (I'm grepping so that means only 1 is still running) it should spawn the final script which should only run once.
The variable of the count is gotten at by
Code:
number_running=`ps -ef | grep simple | -wc l`
This number_running is always zero somehow.
Moderator's Comments:
Please use CODE tags when displaying sample input, output, and code segments.
Unless you redirected diagnostic output to /dev/null, one would assume that the code marked in red above would produce a message similar to:
Code:
-ksh: -wc: not found
since most systems do not have a utility named -wc. One would guess that you intended to use:
Code:
number_running=`ps -ef | grep simple | wc -l`
Note that the output produced by wc -l may include leading <space>s (depending on what version of wc you're using). This may make a difference in the way you write the test to determine the value returned. And, although you can look for 2 instead of 1 to account for the grep command being captured by the grep, there are ways to avoid that. One way to do that is to add another grep to filter out the grep:
but that is rather inefficient. A preferred way to do that is to use a BRE that will match the lines you want to match and avoid matching the grep command too:
Code:
number_running=`ps -ef | grep '[s]imple' | wc -l`
which will just return the number of processes with that contain the string simple in the initial parts of their argument list.
I'm getting rather frustrated with an interactive script I'm writing.
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Hi,
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Hi
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For example
-------
Script ABC
-------
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Hi,
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Dear Members,
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02-23-2018
