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Top Forums UNIX for Advanced & Expert Users Finding process id of subsequent process Post 302367481 by thmnetwork on Monday 2nd of November 2009 08:02:54 PM
Old 11-02-2009
Unless you expect the first script to finish within a second or two, frans's solution is fine. Also, if you added a lock file that gets deleted when the process ends, can't you use the same script that creates the lock file to create it with the pid in the lock file's name? Alternative concepts could be to have envVarSetter write the pid of the child and any other useful info to its parent process's read pipe.

Alternatively, you could look through children of init for processes of that name that began a within a second or two of the script's initial running.

etc, etc. There are a lot of possibilities.
 

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ptree(1)						      General Commands Manual							  ptree(1)

NAME
ptree - prints the process tree hierarchy SYNOPSIS
[pid1|username1 [pid2|username2]...] DESCRIPTION
prints the process tree of all processes that match the specified arguments. While printing the tree, the child processes are indented to the right from their respective parent processes. Options Prints the tree starting from the children of (usually pid 0). The default is to print the tree starting from the children of (pid 1). Operands pid Print the process tree for the process ID number specified by pid. username Print the process tree for all the processes from the user specified by username. Note that only username (and not user ID) can be specified for this instance. If no operands are specified, then prints the process tree of all processes starting from the children of or (if is specified). EXTERNAL INFLUENCES
Environment Variables If is not specified or is null, it defaults to (see lang(5)). EXAMPLES
Print the process tree for pid 100 and for all processes owned by WARNINGS
Process information can change while is running; the tree displayed by is only a snapshot in time. Some data printed for defunct processes is irrelevant. Users of must not rely on the exact field widths and spacing of its output, as these will vary depending on the system and the release of HP-UX. SEE ALSO
pgrep(1), pkill(1), ps(1), fork(2). ptree(1)
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