Date: Wed, 10 Feb 2016 15:23:39 +0700 From: Eugene Grosbein <eugen@grosbein.net> To: Jeremy Boy <jb@jboy.eu>, freebsd-net@freebsd.org Subject: Re: ifconfig with quoted arguments Message-ID: <56BAF38B.3080809@grosbein.net> In-Reply-To: <76A08658-ACD2-426B-865A-45A6A79BBFB4@jboy.eu> References: <76A08658-ACD2-426B-865A-45A6A79BBFB4@jboy.eu>
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On 10.02.2016 04:51, Jeremy Boy wrote: > Hello list, > > please CC me in replies to this mail, since I am no subscriber to this list. > > For safety reasons, we enclose user input to shell commands in quotes. Until today, the resulting command for ifconfig(8) looked like this: > >> ifconfig ue0 inet "192.168.2.176 netmask 255.255.255.0" According to ifconfig(8) manual page, this syntax is wrong. > What exactly does ifconfig do? It seems to me that it reads the IP address from the quoted string but truncates the netmask. Is this a bug in ifconfig or intended behavior? The word "inet" is for "address_family". The next argument should be "address" and you supply "192.168.2.176 netmask 255.255.255.0" for "address". It seems, ifconfig passes this argument to inet_aton() function that parses IP address and ignores first space and the rest of string.
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