On 1/5/21 8:27 PM, Karel Zak wrote: > On Thu, Dec 24, 2020 at 11:14:04AM +1000, David O'Brien wrote: >> I don't know if this is expected or not, but it seems very odd: >> >> # lsblk -o=UUID /stratis/labpool/labfs >> lsblk: unknown column: =UUID >> >> [root@serverb ~]# lsblk -o UUID /stratis/labpool/labfs >> UUID >> 0118efb8-66fe-406a-837c-725961bdad4d >> >> [root@serverb ~]# lsblk --output=UUID /stratis/labpool/labfs >> UUID >> 0118efb8-66fe-406a-837c-725961bdad4d >> >> >> From the man(8) page: >> -o, --output list >> Specify which output columns to print. Use --help to get >> a list of all supported columns. The columns may affect >> tree-like output. The default is to use tree for the >> column 'NAME' (see also --tree). >> >> The default list of columns may be extended if list is >> specified in the format +list (e.g., lsblk -o +UUID). >> >> There is no mention of "=" being required, causing failures, etc. I found this quite frustrating. >> > > This is common getopt_long() behavior where equal sign is usable only for > long options (and sometimes for optional arguments). > > lsblk -o UUID > lsblk --output UUID > lsblk --output=UUID > > this is how "=" works in almost all commands and I don't see reason > why we need to be explicit about it for "lsblk -o". > > Karel > ok. If it's common and expected that's fine. I don't spend a lot of time with this class/type of command and it was just new to me and seemed odd. cheers -- David Introvert/Unclubbable/Cool Red Hat's core values are freedom, courage, commitment, and accountability.
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