Hi,
I've a few small patches here which I think are definitely required.
1: findutils
a: find (%D printf specifier added) which prints the device id
associated with a file. This (in conjunction with the inode
number) allows you to uniquely identify any file on the system,
which is useful/required for many applications.
b: xargs doesn't ignore "empty" arguments when -0 used (I.E. '\0' is
delimiter). You can test this like:
pb@pb:~$ echo -ne "1\n\n\n2" | xargs -n1 | od -t x1
0000000 31 0a 32 0a
pb@pb:~$ echo -ne "1\000\000\0002" | xargs -0 -n1 | od -t x1
0000000 31 0a 0a 0a 32 0a
As you can see the first command works as expected, whereas the
second doesn't. In summary multiple consequtive '\0's should be
squeezed to 1 '\0'
c: Related to b: xargs should have an option to group arguments passed
to commands by 2 or more delimeters, i.e: you should be able to do:
pb@pb:~$ echo -ne "1\n2\n3\n\na\nb\nc\n" | xargs -nn
1 2 3
a b c
pb@pb:~$
2: textutils
a: uniq should print a blank line after every group of duplicates. I.E.
when you use the -D option to print duplicate lines a blank line
should be printed, otherwise this info is lost, and the output can't
be further processed by anything. e.g.:
pb@pb:~$ echo -ne "1\n2\n2\n3\n4\n4\n" | uniq -Db
2
2
4
4
pb@pb:~$
b: uniq should have the same options for selecting columns to
ignore/process like sort. Obviously this is not trivial and so I
haven't a patch for this ;-)
I'm not on the list, and so would appreciate a direct reply.
thanks,
Padraig.
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