Bug 219080

Summary: "sort" command -o output to overwrite the input file, new file permission neither the input file one nor umask conf
Product: Base System Reporter: Howard Wong <ffp.howard>
Component: binAssignee: freebsd-bugs (Nobody) <bugs>
Status: New ---    
Severity: Affects Only Me CC: cem, hiyorin
Priority: ---    
Version: 11.0-RELEASE   
Hardware: Any   
OS: Any   

Description Howard Wong 2017-05-05 08:57:29 UTC 
Given a txt/csv file named 'a',

-rw-r--r--   1 howie  howie  18 May  5 16:26 a

$ sort -k 1 -r a -o b
$ ls -la
total 37
drwxr-xr-x   2 howie  howie   4 May  5 16:33 .
drwxr-xr-x  10 howie  howie  12 May  5 16:26 ..
-rw-------   1 howie  howie  18 May  5 16:33 a
-rw-r--r--   1 howie  howie  18 May  5 16:32 b


That's ok! Now, let's use sort to 'update' the input file, note the file permission of 'a'

$ sort -k 1 -r a --output a
$ls -la
total 37
drwxr-xr-x   2 howie  howie   4 May  5 16:47 .
drwxr-xr-x  10 howie  howie  12 May  5 16:26 ..
-rw-------   1 howie  howie  18 May  5 16:47 a
-rw-r--r--   1 howie  howie  18 May  5 16:32 b

$ chmod a+r a
$ ls -la
total 37
drwxr-xr-x   2 howie  howie   4 May  5 16:47 .
drwxr-xr-x  10 howie  howie  12 May  5 16:26 ..
-rw-r--r--   1 howie  howie  18 May  5 16:47 a
-rw-r--r--   1 howie  howie  18 May  5 16:32 b

$ sort -k 1 -r a --output a
$ ls -la
total 37
drwxr-xr-x   2 howie  howie   4 May  5 16:48 .
drwxr-xr-x  10 howie  howie  12 May  5 16:26 ..
-rw-------   1 howie  howie  18 May  5 16:48 a
-rw-r--r--   1 howie  howie  18 May  5 16:32 b