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Old 10-29-2017, 09:25 AM   #1
JockVSJock
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Question on the placement of {} when using -exec with find


So I'm still not clear on what this means when using find and -exec

Code:
{}
Is this some sort of regular expression?

Also I've noticed that {} has to be placed in different locations in order for it to work correctly, for example.

Code:
useradd -c "mary" mary 

find /-user mary

find / -user mary -exec rm -rf {} \;

*** VS ***

Code:
useradd -c "mary" mary

find / -user mary 

mkdir -p /root/mary_backup

find / -user mary -exec -cp rpfv {} /root/mary_backup \;
For the 1st example {} comes right after the rm -rf, and before the \;.

For the 2nd example, {} comes right after the command cp -rpfv but before the \;. I'm not sure why.

thanks
 
Old 10-29-2017, 09:29 AM   #2
ntubski
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man find:

Code:
       -exec command ;
              Execute command; true if 0 status is returned.  All following
              arguments to find are taken to be arguments to the command until
              an argument consisting of `;' is encountered.  The string `{}' is
              replaced by the current file name being processed everywhere it
              occurs in the arguments to the command, [...]
 
Old 10-29-2017, 10:36 AM   #3
Beryllos
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In other words, {} represents the found file name where it needs to go in the command to be executed.
 
Old 10-29-2017, 11:40 AM   #4
JockVSJock
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I've never had a great understanding of this, what does argument mean?

Quote:
Originally Posted by ntubski View Post
man find:

Code:
       -exec command ;
              Execute command; true if 0 status is returned.  All following
              arguments to find are taken to be arguments to the command until
              an argument consisting of `;' is encountered.  The string `{}' is
              replaced by the current file name being processed everywhere it
              occurs in the arguments to the command, [...]
 
Old 10-29-2017, 11:54 AM   #5
ntubski
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Quote:
Originally Posted by JockVSJock View Post
I've never had a great understanding of this, what does argument mean?
when you run a command like
Code:
rm -rf foo
You are passing -rf and foo as the arguments (also known as parameters) to the command rm.
 
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