Re: [OpenWrt-Devel] problem with big integer on openwrt
very thanks to all :D
2010/7/15 Andreas Mohr
> On Thu, Jul 15, 2010 at 12:00:04PM +0200,
> openwrt-devel-requ...@lists.openwrt.org wrote:
> > Hey all I have a big problem with openwrt!
> >
> > In a bash shell if i write this command
> > printf "%d\n" "`echo "255.255.255.255" | awk -F\. '{printf "%d",
> > ($4)+($3*256)+($2*256*256)+($1*256*256*256)}'`"
> > i obtain
> > 2147483647
> > that is wrong!
>
> The question here would be WHAT exactly is wrong here ;)
> Probably not this shell...
>
> %d is a format string for a _signed_ integer, not the unsigned
> expression that is being evaluated here.
> And with common systems an integer value is specified as 32bit,
> resulting in this INT_MAX value for any values _larger_ than that.
>
> > If i put the same command in my gentoo bash shell i obtain 4294967295
> that
> > is the good value how to fix this ?
>
> %u would fix that, or perhaps better use %lu (or better %llu?) for
> higher probability to get the correct value.
> OTOH since an IPv4 address will always remain 32bit, %u is fully
> sufficient and thus the exactly adapted and proper solution.
>
> HTH,
>
> Andreas Mohr
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Re: [OpenWrt-Devel] problem with big integer on openwrt
On Thu, Jul 15, 2010 at 12:00:04PM +0200,
openwrt-devel-requ...@lists.openwrt.org wrote:
> Hey all I have a big problem with openwrt!
>
> In a bash shell if i write this command
> printf "%d\n" "`echo "255.255.255.255" | awk -F\. '{printf "%d",
> ($4)+($3*256)+($2*256*256)+($1*256*256*256)}'`"
> i obtain
> 2147483647
> that is wrong!
The question here would be WHAT exactly is wrong here ;)
Probably not this shell...
%d is a format string for a _signed_ integer, not the unsigned
expression that is being evaluated here.
And with common systems an integer value is specified as 32bit,
resulting in this INT_MAX value for any values _larger_ than that.
> If i put the same command in my gentoo bash shell i obtain 4294967295 that
> is the good value how to fix this ?
%u would fix that, or perhaps better use %lu (or better %llu?) for
higher probability to get the correct value.
OTOH since an IPv4 address will always remain 32bit, %u is fully
sufficient and thus the exactly adapted and proper solution.
HTH,
Andreas Mohr
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Re: [OpenWrt-Devel] problem with big integer on openwrt
The problem is not Openwrt but awk that cannot handle big number on small
device :(
bash can than i fixed with this
printf "%d\n" $(( (`echo "255.255.255.255" | awk -F\. '{printf "%d",
($4)}'`)+ (256*`echo "255.255.255.255" | awk -F\. '{printf "%d", ($3)}'`) +
(256*256*`echo "255.255.255.255" | awk -F\. '{printf "%d", ($2)}'`) +
(256*256*256*`echo "255.255.255.255" | awk -F\. '{printf "%d", ($4)}'`) ))
2010/7/15 Gioacchino Mazzurco
> Hey all I have a big problem with openwrt!
>
> In a bash shell if i write this command
> printf "%d\n" "`echo "255.255.255.255" | awk -F\. '{printf "%d",
> ($4)+($3*256)+($2*256*256)+($1*256*256*256)}'`"
> i obtain
> 2147483647
> that is wrong!
>
> If i put the same command in my gentoo bash shell i obtain 4294967295 that
> is the good value how to fix this ?
>
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Re: [OpenWrt-Devel] problem with big integer on openwrt
If awk of Busybox has a range limit issue, then try calculating in the
shell itself:
echo $(( `echo "255.255.255.255" | awk -F\. '{printf "(%i*256*256*256)
+ (%i*256*256) + (%i*256) + (%i)", $1, $2, $3, $4}'` ))
Awk creates the formular, while ash calculates it via $((
Maddes
On 15.07.2010 11:46, Gioacchino Mazzurco wrote:
> Hey all I have a big problem with openwrt!
>
> In a bash shell if i write this command
> printf "%d\n" "`echo "255.255.255.255" | awk -F\. '{printf "%d",
> ($4)+($3*256)+($2*256*256)+($1*256*256*256)}'`"
> i obtain
> 2147483647
> that is wrong!
>
> If i put the same command in my gentoo bash shell i obtain 4294967295
> that is the good value how to fix this ?
>
>
>
> ___
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> openwrt-devel@lists.openwrt.org
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[OpenWrt-Devel] problem with big integer on openwrt
Hey all I have a big problem with openwrt!
In a bash shell if i write this command
printf "%d\n" "`echo "255.255.255.255" | awk -F\. '{printf "%d",
($4)+($3*256)+($2*256*256)+($1*256*256*256)}'`"
i obtain
2147483647
that is wrong!
If i put the same command in my gentoo bash shell i obtain 4294967295 that
is the good value how to fix this ?
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[OpenWrt-Devel] Resolve interfaces in dnsmasq configuration
Hi, shouldn't /etc/init.d/dnsmasq try to "resolve" the name of interfaces w.r.t. how they are called in /etc/config/network? I've been bitten by this recently. If there is no objection, I'll make a patch and submit it here. Regards, -- Gabriel ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
Re: [OpenWrt-Devel] [PATCH 1/3] ar71xx: in-flash macs and eeprom for mach-eap7660d
2010.07.14. 0:38 keltezéssel, daniel.go...@gmail.com írta: > I now renamed everything to ath5k_platform and also included all other > previously suggested fixes. > Cheers! > > > This adds in-flash mac-addresses and callibration data for the Senao EAP7660D > board. > > Signed-off-by: Daniel Golle Applied: https://dev.openwrt.org/changeset/22187 Thanks, Gabor ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
Re: [OpenWrt-Devel] [PATCH 3/3] madwifi: in-flash macs for mach-eap7660d
2010.07.14. 0:45 keltezéssel, daniel.go...@gmail.com írta: > Moved new code outside of #ifdef CONFIG_ATHEROS_AR71XXX and removed unneeded > cast. > > > This patch makes madwifi respect (at least) the platform_data supplied MAC > address. > > Signed-off-by: Daniel Golle Applied: https://dev.openwrt.org/changeset/22190 Thanks, Gabor ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
Re: [OpenWrt-Devel] [PATCH 2/3] ath5k: in-flash macs and eeprom for mach-eap7660d
2010.07.14. 0:42 keltezéssel, daniel.go...@gmail.com írta: > I removed unneeded casts and now hopefully really checking the first word for > the magic... > Also renamed everything to ath5k_platform here, too, of course. > > > This adds ath_platform.h to mac80211 and patches ath5k to respect MAC > addresses and eeprom content from platform_data, if supplied. > > Signed-off-by: Daniel Golle Applied: https://dev.openwrt.org/changeset/22188 Thanks, Gabor ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
