So even if I execute following command, it gives same result: env POSIXLY_CORRECT=1 echo --help
prateek@prateek-pc:~/Documents/awk$ env POSIXLY_CORRECT=1 echo --help --help Thanks, prateek On 15 January 2015 at 19:39, Eric Blake <[email protected]> wrote: > On 01/15/2015 04:36 AM, Pádraig Brady wrote: > > tag 19604 notabug > > close 19604 > > stop > > > > On 15/01/15 06:20, prateek goyal wrote: > >> Hi, > >> > >> > >> when I try to use --help option with echo command, it does not print > help contents, but prints "--help". > >> > >> > >> prateek@prateek-pc:~/Documents/awk$ echo --help > >> --help > > > > You're actually using your shell's echo there. > > To use the coreutils one: > > > > env echo --help > > Furthermore, the behavior you saw in your shell is required by POSIX. > If you do 'env POSIXLY_CORRECT=1 echo --help', you will get the same > behavior from coreutils as you did from your shell. 'echo' is one of > the few utilities that _cannot_ honor --help for compatibility reasons. > > > > Note newer versions of bash will support $builtin --help, > > though I've not tested the echo case which would > > introduce a change in behavior. > > If bash changes the behavior of 'echo --help' in POSIX mode, then that > would be a bug in bash. > > -- > Eric Blake eblake redhat com +1-919-301-3266 > Libvirt virtualization library http://libvirt.org > > -- *Thanks,Prateek Goyal*
