[Bug 206809] [patch] Add Octal Number Support for install -f

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206809

            Bug ID: 206809
           Summary: [patch] Add Octal Number Support for install -f
           Product: Base System
           Version: 10.2-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Keywords: patch
          Severity: Affects Many People
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: freebsd-bugs at nanoman.ca
          Keywords: patch

Created attachment 166372
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=166372&action=edit
patch to add octal number support for install -f

Let's say you have a file that has file flags, and you need to use install(1)
to install a copy of it that doesn't have file flags.  After reading the
manuals of install(1) and chflags(1), you try this:

# install -f 0 /path/to/foo /path/to/bar
install: 0: invalid flag

It seems that install -f doesn't support octal numbers.  There isn't a single
keyword that clears all file flags, so to use only install, you'd have to do
this:

# install -f
noarch,dump,noopaque,nosappnd,noschg,nosunlnk,nouappnd,nouarch,nouchg,nouhidden,nouoffline,nourdonly,nousparse,nousystem,noureparse,nouunlnk
/path/to/foo /path/to/bar

A workaround would be to use both install and chflags:

# install /path/to/foo /path/to/bar
# chflags 0 /path/to/bar

I've attached a patch for /head/usr.bin/xinstall/xinstall.c.  This patch adds
octal number support for install -f.

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