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Print all the directory with no directory name mydir

 
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Top Forums UNIX for Dummies Questions & Answers Print all the directory with no directory name mydir
# 8  
Old 02-14-2013
Quote:
Originally Posted by DGPickett
Well, sometimes it is cheaper to "2>/dev/null" than to test for potential directories or files.
To quote Grace Hopper:
Quote:
It's easier to ask forgiveness than it is to get permission.
That maxim comes to mind every time I see code contorted to avoid harmless errors.

Regards,
Alister
# 9  
Old 02-14-2013
Well, not quite up to the forgiveness/permission level! More hidden requirements for the competence of those who use and maintain, avoiding anything that might cause them to overreact, like 'normal errors', so sometimes it is important to have none logged. It has more to do with the local culture. Shops vary enormously in that.
# 10  
Old 02-14-2013
Quote:
Originally Posted by DGPickett
Well, not quite up to the forgiveness/permission level!
Trying to avoid error messages with pre-emptive file existence checks is indeed a matter of asking for permission instead of forgiveness. Further, it's a faulty approach because of the race between the check and the subsequent command.

Regards,
Alister
# 11  
Old 02-15-2013
Race situations are not easy to process error free, like if you mv input_file3976 input_file3976_$$ and it errors ENOENT, someone else renamed it first. If input_file3976_$$ exists, you got there first, and used directory file locking to get control of the file cleanly.

Luckily, most scripts run in a quiexcent situation.
 
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