Bug 219080 - "sort" command -o output to overwrite the input file, new file permission neither the input file one nor umask conf
Summary: "sort" command -o output to overwrite the input file, new file permission nei...
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: bin (show other bugs)
Version: 11.0-RELEASE
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-bugs mailing list
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-05-05 08:57 UTC by Howard Wong
Modified: 2017-05-05 14:47 UTC (History)
2 users (show)

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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