Mail Archives: cygwin/2001/11/27/18:37:21
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I want to cron/at a bash script but have it check to see if another =
instance of the script is already running.
I did a ps -Wl and a ps -ef while I had the script running and while I =
saw the /usr/bin/bash executables (my current shell and the shell I =
wanted to detect) they did not contain enough information to =
differentiate between the two shells.
Any ideas of how I can determine this? I thought of using a temp file, =
but if the script terminates abnormally it might not cleanup it's files, =
causing the next cron job to not run, thinking that the other script is =
still running.
Basically I'm trying to introduce some error recovery into a script. So =
that if it terminates, another instance will be started.
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<DIV><FONT face=3DArial size=3D2>I want to cron/at a bash =
script but have=20
it check to see if another instance of the script is already=20
running.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I did a ps -Wl and a ps -ef while I had =
the script=20
running and while I saw the /usr/bin/bash executables (my current shell =
and the=20
shell I wanted to detect) they did not contain enough information to=20
differentiate between the two shells.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Any ideas of how I can determine this? =
I thought of=20
using a temp file, but if the script terminates abnormally it might not =
cleanup=20
it's files, causing the next cron job to not run, thinking that the =
other script=20
is still running.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Basically I'm trying to introduce some =
error=20
recovery into a script. So that if it terminates, another instance will =
be=20
started.</FONT></DIV></BODY></HTML>
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