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script dumb question

 
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# 1  
Old 08-01-2005
script dumb question
Hi,

i'm dealing with a script and I have one question. If I have these:
Code:
#!/bin/bash

wget http://somesite/file.tar
tar xvf file.tar

exit

I need the line that contains the command tar to wait until file.tar is completly downloaded, but it doesn't and continues with the next line generating an error because there is nothing to untar...

Any idea ? Thanks in advance.
# 2  
Old 08-01-2005
wget runs in the current process context, then runs in a child process, I believe. try wait
Code:
#!/bin/bash

wget http://somesite/file.tar &
wait
tar xvf file.tar

exit

# 3  
Old 08-02-2005
Well, I tried your suggestion but I have the same result.
I can put a "sleep 60", but I believe its a dumb solution cause the file can be downloaded, maybe in 15 minutes, depending the lan use.

Thanks.
# 4  
Old 08-02-2005
sorry "sleep 1200"
# 5  
Old 08-02-2005
Ugly answer, but should work and not waste time
This might be an ugly solution but you could write a little loop, im not exactly sure of the syntax, Ill look it up if you want. (It's on google) But any way that does:


#!/bin/bash
donevar=0

wget http://somesite/file.tar &

while [donevar=0]; do
if [ -s "file.tar" ]; then
tar xvf file.tar
donevar=1
else
#you can pause if you want it doesn't really matter
fi
done


if you want you could get rid of the if, but I think it is uglier:

#!/bin/bash

wget http://somesite/file.tar &

while [! -s file.tar]; do
#you can pause if you want it doesn't really matter
done

tar xvf file.tar
# 6  
Old 08-02-2005
This would be awsome
It is also posible that if you made the wget a forground process :


#!/bin/bash

wget http://somesite/file.tar (delete &)
wait
tar xvf file.tar

exit

it would wait the right way
# 7  
Old 08-02-2005
ok, I will try it and the I'll post the comments.

Thanks a lot.
 
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