misc/158846: printf error if format string begin with a dash '-'

[freethread]

>Number:         158846
>Category:       misc
>Synopsis:       printf error if format string begin with a dash '-'
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jul 12 21:50:10 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     freethread
>Release:        8.2 RELEASE
>Organization:
>Environment:
FreeBSD alpha.freethread.lan 8.2-RELEASE FreeBSD 8.2-RELEASE #1: Wed Mar 30 00:29:15 CEST 2011     root at alpha.freethread.lan:/usr/obj/usr/src/sys/ALPHA  i386

>Description:
using the following command (inline or in script)

    printf "-h, --help       show help"

the printf command raise the error

    printf: illegal option -- h
    usage: printf format [arguments ...]

it should be ok if printf accept options, but this is not the case (as in the previous message):

    usage: printf format [arguments ...]

workarounds:

    printf "\-h, --help       show help"
    printf "%s" "-h, --help       show help"

>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: