04-08-2010
Finding apache process id that is spawned by a wget
Hi,
I have a situation where I am writing a programme that runs a series of long running PHP scripts that can take anything from 20 minutes to 10 hours to execute.
I have a solution half implemented where I use via php exec(wget <location to command>) and get the process id back.
This returns to PHP the process ID of the wget process. However what I'm looking for is to get the process ID of the apache process that wget starts and runs. However the apache process that is doing the work doesn't appear to be any relation to the wget process (eg the apache process isn't a child process of wget).
What my question is - is there a way of determing the process Id of the apache process to send back to my php script for monitoring it ?
Cheers.
-mrploddy
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FORK(2) System Calls Manual FORK(2)
NAME
fork - spawn new process
SYNOPSIS
fork( )
DESCRIPTION
Fork is the only way new processes are created. The new process's core image is a copy of that of the caller of fork. The only distinc-
tion is the fact that the value returned in the old (parent) process contains the process ID of the new (child) process, while the value
returned in the child is 0. Process ID's range from 1 to 30,000. This process ID is used by wait(2).
Files open before the fork are shared, and have a common read-write pointer. In particular, this is the way that standard input and output
files are passed and also how pipes are set up.
SEE ALSO
wait(2), exec(2)
DIAGNOSTICS
Returns -1 and fails to create a process if: there is inadequate swap space, the user is not super-user and has too many processes, or the
system's process table is full. Only the super-user can take the last process-table slot.
ASSEMBLER
(fork = 2.)
sys fork
(new process return)
(old process return, new process ID in r0)
The return locations in the old and new process differ by one word. The C-bit is set in the old process if a new process could not be cre-
ated.
FORK(2)