Hi Gurus,

Some questions regarding wait. I have tried searching in this forum for threads on wait but not completely got what I am looking for.

Background:
One script (.sh) that starts/calls a reference to an application's executable and submits a batch job to it. Objective is to wait for the submitted job and once the batch job finishes, get its return code to the scheduler which is sniffing for a return code.

parent script: run.sh

Code:

  #! /usr/sh
  #sample to understand behavior
   /opt/app/r.exe /code/project1/foo.r &
    wait
   echo $?

I get invalid file /code/project1/foo.r 0

I man(ed) wait read thru it but frankly the WIFEXITED, WNOHANG etc I understood but could not find a simple workable "example". The forum threads talk about spawning multiple scripts form one parent script, or ftp, etc etc which is not what I could use.

Questions:
1. Does wait only works with a script starting a child script?
2. I google (d) but could not find any simple working example of wait or an example of how best to use the WIFEXITED, WNOHANG, etc etc. Is there a dummy proof simple example?

Perhaps this is rather simple but I have been staring at it for a while now and dazed

All suggestions are eagerly accepted and thank you in advance.

---------- Post updated at 06:40 PM ---------- Previous update was at 06:36 PM ----------

Hi Gurus,

Some questions regarding wait. I have tried searching in this forum for threads on wait but not completely got what I am looking for.

Background:
One script (.sh) that starts/calls a reference to an application's executable and submits a batch job to it. Objective is to wait for the submitted job and once the batch job finishes, get its return code to the scheduler which is sniffing for a return code.

parent script: run.sh

Code:

  #! /usr/sh
  #sample to understand behavior
   /opt/app/r.exe /code/project1/foo.r &
    wait
   echo $?

I get invalid file /code/project1/foo.r 0

I man(ed) wait read thru it but frankly the WIFEXITED, WNOHANG etc I understood but could not find a simple workable "example". The forum threads talk about spawning multiple scripts form one parent script, or ftp, etc etc which is not what I could use.

Questions:
1. Does wait only works with a script starting a child script?
2. I google (d) but could not find any simple working example of wait or an example of how best to use the WIFEXITED, WNOHANG, etc etc. Is there a dummy proof simple example?

Perhaps this is rather simple but I have been staring at it for a while now and dazed

All suggestions are eagerly accepted and thank you in advance.

** I googled, did man wait, did more google. Perhaps it needs to be dummied down a bit for me, lol.