LDD mistery

vadiml · 07-16-2009, 08:42 AM

Hello,

While looking at the /usr/bin/ldd script i observe there a following chunk of code:

for file do
... do something with ${file}
done

Can some shell guru explain me please how does the above loop works?

It seems that 'file' is not shell builtin...
If simply execute file on the command line t gives a help message

Thanks
Vadim

AlucardZero · 07-16-2009, 10:45 AM

file is a local variable in that script. But, I don't see how it is set. Hopefully someone more versed in shell scripting can tell us.

Valery Reznic · 07-17-2009, 04:46 AM

Code:

for file in var1 var2 var3; do
done

file iterate in the list var1, var2, var3

Code:

for file do
done

file iterate over positional parameters list, i., $1, $2, $3, etc