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Waiting for a process completion

Waiting for a process completion

Waiting for a process completion

So I am writing a fotran90 code in which I run an executable using system calls:

call system('./myexec')

The executable program writes the data into output file opdata.dat which fortran reads:

! Read output data from file

However, the trouble is the executble takes a long time to complete the process. In the meantime, the read statement tries to access the non-existent file opdata.dat, and obviously return with error. So how do I pasue execution of my fortran code till the process is complete?

One way I can do this is to inquire whether file opdata.dat exists:

and proceed further only when the file exists.

Is there any other elegant way to achive this ?


RE: Waiting for a process completion

Which OS/compiler are you using.  Every vendor's version will exhibit different behaviour.

RE: Waiting for a process completion

So, why can't you use the same process to invoke your and reverse the calling?  I.e., program 2 completes, then calls program 1.


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