08-13-2003
First, post what OS and version.
Second, post how you are starting these two processes - include, if applicable, the lines from the script(s). Post if the processes are started from the same script, or two different ones.
As a suggestion (since the information isn't yet known), you could look for the first process id from the script running the second process (modify your script to write it to a file, or create a temp file that the second script waits to be delete before starting to run) and use either the sleep command or wait command while waiting for the first to finish.
Example:
First script starts first Oracle process: change it to create a temp file
touch /tmp/Oracle1.tmp
At the end of the script, remove the temp file.
Second script starts second Oracle process:
Checks to see if the file exists - if it does, sleep for xx amount of time and then check again. Once the file is removed, the second script will start the second process.
If your OS, as Perderabo has mentioned, uses different scripts in startup, then it's also just as easy to find how much time you need to wait and just put the second script in a 'later' start by changing the number of the script (S99 versus S01).
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LEARN ABOUT OPENDARWIN
sleep
SLEEP(1) BSD General Commands Manual SLEEP(1)
NAME
sleep -- suspend execution for an interval of time
SYNOPSIS
sleep seconds
DESCRIPTION
The sleep command suspends execution for a minimum of seconds.
If the sleep command receives a signal, it takes the standard action.
IMPLEMENTATION NOTES
The SIGALRM signal is not handled specially by this implementation.
The sleep command will accept and honor a non-integer number of specified seconds (with a '.' character as a decimal point). This is a non-
portable extension, and its use will nearly guarantee that a shell script will not execute properly on another system.
EXAMPLES
To schedule the execution of a command for x number seconds later (with csh(1)):
(sleep 1800; sh command_file >& errors)&
This incantation would wait a half hour before running the script command_file. (See the at(1) utility.)
To reiteratively run a command (with the csh(1)):
while (1)
if (! -r zzz.rawdata) then
sleep 300
else
foreach i (`ls *.rawdata`)
sleep 70
awk -f collapse_data $i >> results
end
break
endif
end
The scenario for a script such as this might be: a program currently running is taking longer than expected to process a series of files, and
it would be nice to have another program start processing the files created by the first program as soon as it is finished (when zzz.rawdata
is created). The script checks every five minutes for the file zzz.rawdata, when the file is found, then another portion processing is done
courteously by sleeping for 70 seconds in between each awk job.
DIAGNOSTICS
The sleep utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
nanosleep(2), sleep(3)
STANDARDS
The sleep command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
HISTORY
A sleep command appeared in Version 4 AT&T UNIX.
BSD
April 18, 1994 BSD