Justin Pryzby <[EMAIL PROTECTED]> wrote:
> As noted in the (now merged) twin bug #367011, I suspected that there
> had been some change regarding optional arguments to commandline
> options. Can you give more information on this change?
This change was mentioned in NEWS.
POSIX conformance...
-----------------------------
** Bring back support for `head -NUM', `tail -NUM', etc. even when
conforming to POSIX 1003.1-2001. The following changes apply only
when conforming to POSIX 1003.1-2001; there is no effect when
conforming to older POSIX versions.
The following usages now behave just as when conforming to older POSIX:
date -I
expand -TAB1[,TAB2,...]
fold -WIDTH
head -NUM
join -j FIELD
join -j1 FIELD
join -j2 FIELD
join -o FIELD_NAME1 FIELD_NAME2...
nice -NUM
od -w
pr -S
split -NUM
tail -[NUM][bcl][f] [FILE]
The following usages no longer work, due to the above changes:
date -I TIMESPEC (use `date -ITIMESPEC' instead)
od -w WIDTH (use `od -wWIDTH' instead)
pr -S STRING (use `pr -SSTRING' instead)
A few usages still have behavior that depends on which POSIX standard is
being conformed to, and portable applications should beware these
problematic usages. These include:
Problematic Standard-conforming replacement, depending on
usage whether you prefer the behavior of:
POSIX 1003.2-1992 POSIX 1003.1-2001
sort +4 sort -k 5 sort ./+4
tail +4 tail -n +4 tail ./+4
tail - f tail f [see (*) below]
tail -c 4 tail -c 10 ./4 tail -c4
touch 12312359 f touch -t 12312359 f touch ./12312359 f
uniq +4 uniq -s 4 uniq ./+4
(*) "tail - f" does not conform to POSIX 1003.1-2001; to read
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